U.S. Department of the Interior

U.S. Geological Survey

Data Series 788

Prepared in cooperation with the Fort Irwin National Training Center

Construction, Water-Level, and Water-Quality Data for 

Multiple-Well Monitoring Sites and Test Wells, Fort Irwin 

National Training Center, San Bernardino County, California, 

2009–12
Cover. U.S. Geological Survey drilling rig at Nelson Lake, Fort Irwin National Training Center, California. Photograph by Joseph 

Nawikas, U.S. Geological Survey.
Construction, Water-Level, and WaterQuality Data for Multiple-Well Monitoring 

Sites and Test Wells, Fort Irwin National 

Training Center, San Bernardino County, 

California, 2009–12

By A.R. Kjos, J.N. Densmore, J.M. Nawikas, and A.A. Brown

Prepared in cooperation with the Fort Irwin National Training Center 

Data Series 788

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

SALLY JEWELL, Secretary

U.S. Geological Survey

Suzette M. Kimball, Acting Director

U.S. Geological Survey, Reston, Virginia: 2014

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Suggested citation:

Kjos, A.R., Densmore, J.N., Nawikas, J.M., and Brown, A.A., 2014, Construction, water-level, and water-quality 

data for multiple-well monitoring sites and test wells, Fort Irwin National Training Center, San Bernardino County, 

California, 2009–12, Data Series 788, 139 p., https://dx.doi.org/10.3133/ds788.

ISSN 2327-638X (online)
iii

Contents

Abstract...........................................................................................................................................................1

Introduction.....................................................................................................................................................1

Hydrogeologic Setting .........................................................................................................................2

Purpose and Scope ..............................................................................................................................3

Drilling Procedures and Associated Construction Data .........................................................................3

Well Drilling and Construction............................................................................................................3

Lithologic Data.......................................................................................................................................4

Geophysical Logs..................................................................................................................................4

Water-Level and Water-Quality Methods And Data................................................................................5

Water-Level Methods and Data .........................................................................................................5

Water-Quality Methods and Data ......................................................................................................5

Quality-Control Methods and Data ....................................................................................................6

Blank Samples..............................................................................................................................6

Replicate Samples.......................................................................................................................6

Replicate Analysis ..............................................................................................................6

Replicate Results ................................................................................................................6

Sample Comparisons to Sum of Major Constituents .............................................................7

References Cited............................................................................................................................................7

Figures ...........................................................................................................................................................10

Tables ...........................................................................................................................................................33
iv

Figures

1. Map showing location of study area, production wells, and groundwater

basins within Fort Irwin National Training Center, California..............................................11

2. Map showing location of study area, groundwater basins, and well locations

within Fort Irwin National Training Center, California...........................................................12

3. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site LL04 (12N/03E-01M1S, 

-01M2S, -01M3S) and well-construction diagram for multiple-well 

monitoring site LL04B (12N/03E-01M4S, -01M5S), Fort Irwin National 

Training Center, California.........................................................................................................13

4. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site CRTH2 (13N/05E-08B1S, 

-08B2S), Fort Irwin National Training Center, California .......................................................14

5. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, 

-28Q2S, -28Q3S), Fort Irwin National Training Center, California .........................................15

6. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site GOLD2 (14N/01E-07R1S, 

-07R2S, -07R3S), Fort Irwin National Training Center, California..........................................16

7. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site BLA5 (14N/03E-26K1S, 

-26K2S, -26K3S) and well-construction diagram for single-well monitoring 

site BLA5B (14N/03E-26K4S), Fort Irwin National Training Center, California ....................17

8. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site GOLD1 (15N/01E-28R1S, 

-28R2S, -28R3S), Fort Irwin National Training Center, California..........................................18

9. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well GOLD1-T (15N/01E-28R4S), Fort Irwin 

National Training Center, California.........................................................................................19

10. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well NELT6 (15N/02E-05N1S), Fort Irwin 

National Training Center, California.........................................................................................20

11. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site NELT2 (15N/03E-06L1S, 

-06L2S, -06L3S), Fort Irwin National Training Center, California...........................................21

12. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well NELT4 (15N/03E-08L1S), Fort Irwin 

National Training Center, California.........................................................................................22
v

13. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site CCT1 (15N/03E-25L1S, 

-25L2S, -25L3S), Fort Irwin National Training Center, California...........................................23

14. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well RDPS (15N/06E-33L1S), Fort Irwin 

National Training Center, California.........................................................................................24

15. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well NELT5 (16N/01E-35P1S), Fort Irwin 

National Training Center, California.........................................................................................25

16. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site NELT7 (16N/02E-16P1S, 

-16P2S, -16P3S), Fort Irwin National Training Center, California..........................................26

17. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well NELT3 (16N/02E-31H1S), Fort Irwin 

National Training Center, California.........................................................................................27

18. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for multiple-well monitoring site NELT1 (16N/02E-34Q1S, 

-34Q2S), Fort Irwin National Training Center, California .......................................................28

19. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for test well SBTW (31S/46E-05B1M), Fort Irwin 

National Training Center, California.........................................................................................29

20. Diagrams showing well-construction and generalized lithology for multiplewell monitoring site SBMW (31S/46E-05B2M, -05B3M) Fort Irwin National 

Training Center, California, and geophysical logs from SBTW (31S/46E-05B1M)...................30

21. Diagrams showing geophysical logs, well-construction diagram, and

generalized lithology for single-well monitoring site SBMC (31S/46E-05D1M), 

Fort Irwin National Training Center, California.......................................................................30

22. Graphs showing nomenclature used for description of texture in lithologic logs.

A, ternary diagram used for samples containing gravel; B, ternary diagram

used for samples lacking gravel ..............................................................................................31

23. Graph showing the relation between the sum of major constituents and

dissolved solids and specific conductance from monitoring and test wells at

the Fort Irwin National Training Center, San Bernardino County, California,

2009–12 .........................................................................................................................................32

Figures—Continued
vi

Tables

1. Well construction data for monitoring and test wells, Fort Irwin National

Training Center, California.........................................................................................................34

2A. Lithologic SHAKER log for multiple-well monitoring site LL04 (12N/03E-01M1S,

-01M2S, -01M3S), Fort Irwin National Training Center, California......................................37

2B. Lithologic SIEVE log for multiple-well monitoring site LL04 (12N/03E-01M1S,

-01M2S, -01M3S) Fort Irwin National Training Center, California.......................................41

3A. Lithologic SHAKER log for multiple-well monitoring site CRTH2 (13N/05E-08B1S,

-08B2S) Fort Irwin National Training Center, California........................................................43

3B. Lithologic SIEVE log for multiple-well monitoring site CRTH2 (13N/05E-08B1S,

-08B2S) Fort Irwin National Training Center, California........................................................46

4A. Lithologic SHAKER log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S,

-28Q2S, -28Q3S), Fort Irwin National Training Center, California........................................48

4B. Lithologic SIEVE log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S,

-28Q2S, -28Q3S), Fort Irwin National Training Center, California........................................52

5A. Lithologic SHAKER log for multiple-well monitoring site GOLD2 (14N/01E-07R1S,

-07R2S, -07R3S), Fort Irwin National Training Center, California ........................................55

5B. Lithologic SIEVE log for multiple-well monitoring site GOLD2 (14N/01E-07R1S,

-07R2S, -07R3S), Fort Irwin National Training Center, California ........................................57

6A. Lithologic SHAKER log for multiple-well monitoring site BLA5 (14N/03E-26K1S,

-26K2S, -26K3S), Fort Irwin National Training Center, California ........................................58

6B. Lithologic SIEVE log for multiple-well monitoring site BLA5 (14N/03E-26K1S,

-26K2S,-26K3S), Fort Irwin National Training Center, California .........................................60

7A. Lithologic SHAKER log for multiple-well monitoring site GOLD1 (15N/01E-28R1S,

-28R2S, -28R3S), Fort Irwin National Training Center, California ........................................61

7B. Lithologic SIEVE log for multiple-well monitoring site GOLD1 (15N/01E-28R1S,

-28R2S, -28R3S), Fort Irwin National Training Center, California ........................................64

8A. Lithologic SHAKER log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin

National Training Center, California.........................................................................................66

8B. Lithologic SIEVE log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin 

National Training Center, California.........................................................................................69

9A. Lithologic SHAKER log for test well NELT6 (15N/02E-05N1S), Fort Irwin 

National Training Center, California.........................................................................................71

9B. Lithologic SIEVE log for test well NELT6 (15N/02E-05N1S), Fort Irwin 

National Training Center, California.........................................................................................75

10A. Lithologic SHAKER log for multiple-well monitoring site NELT2 (15N/03E-06L1S,

-06L2S, -06L3S), Fort Irwin National Training Center, California .........................................77

10B. Lithologic SIEVE log for multiple-well monitoring site NELT2 (15N/03E-06L1S,

-06L2S, -06L3S), Fort Irwin National Training Center, California .........................................81

11A. Lithologic SHAKER log for test well NELT4 (15N/03E-08L1S), Fort Irwin 

National Training Center, California.........................................................................................83

11B. Lithologic SIEVE log for test well NELT4 (15N/03E-08L1S), Fort Irwin 

National Training Center, California.........................................................................................87
vii

12A. Lithologic SHAKER log for multiple-well monitoring site CCT1 (15N/03E-25L1S,

-25L2S, -25L3S), Fort Irwin National Training Center, California .........................................89

12B. Lithologic SIEVE log for multiple-well monitoring site CCT1 (15N/03E-25L1S,

-25L2S, -25L3S)............................................................................................................................92

13A. Lithologic SHAKER log for test well RDPS (15N/06E-33L1S), Fort Irwin 

National Training Center, California.........................................................................................94

13B. Lithologic SIEVE log for test well RDPS (15N/06E-33L1S), Fort Irwin 

National Training Center, California.........................................................................................96

14A. Lithologic SHAKER log for test well NELT5 (16N/01E-35P1S), Fort Irwin 

National Training Center, California.........................................................................................98

14B. Lithologic SIEVE log for test well NELT5 (16N/01E-35P1S), Fort Irwin 

National Training Center, California.......................................................................................101

15A. Lithologic SHAKER log for multiple-well monitoring site NELT7 (16N/02E-16P1S,

-16P2S, -16P3S), Fort Irwin National Training Center, California ......................................103

15B. Lithologic SIEVE log for multiple-well monitoring site NELT-7 (16N/02E-16P1S,

-16P2S, -16P3S), Fort Irwin National Training Center, California ......................................106

16A. Lithologic SHAKER log for test well NELT3 (16N/02E-31H1S), Fort Irwin 

National Training Center, California.......................................................................................108

16B. Lithologic SIEVE log for test well NELT3 (16N/02E-31H1S), Fort Irwin 

National Training Center, California.......................................................................................111

17A. Lithologic SHAKER log for multiple-well monitoring site NELT1 (16N/02E-34Q1S,

-34Q2S), Fort Irwin National Training Center, California.....................................................113

17B. Lithologic SIEVE log for multiple-well monitoring site NELT1 (16N/02E-34Q1S,

-34Q2S), Fort Irwin National Training Center, California.....................................................116

18A. Lithologic SHAKER log for test well SBTW (31S/46E-05B1M), Fort Irwin 

National Training Center, California.......................................................................................118

18B. Lithologic SIEVE log for test well SBTW (31S/46E-05B1M), Fort Irwin 

National Training Center, California.......................................................................................120

19A. Lithologic SHAKER log for multiple-well monitoring site SBMW

(31S/46E-05B2M, -05B3M), Fort Irwin National Training Center, California....................121

19B. Lithologic SIEVE log for multiple-well monitoring site SBMW (31S/46E-05B2M,

-05B3M), Fort Irwin National Training Center, California ...................................................122

20A. Lithologic SHAKER log for single-well monitoring site SBMC (31S/46E-05D1M),

Fort Irwin National Training Center, California.....................................................................123

20B. Lithologic SIEVE log for single-well monitoring site SBMC (31S/46E-05D1M),

Fort Irwin National Training Center, California.....................................................................124

21. Summary of water-level data from monitoring and test wells, Fort Irwin

National Training Center, California, 2012.............................................................................125

22. Summary of water-quality data from monitoring and test wells at the Fort Irwin

National Training Center, San Bernardino County, California, 2009–12...........................128

Tables—Continued
viii

Conversion Factors

Inch/Pound to SI

Multiply By To obtain

Length

inch (in.) 2.54 centimeter (cm)

inch (in.) 25.4 millimeter (mm)

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

acre 4,047 square meter (m2

)

acre 0.4047 hectare (ha)

square mile (mi2

) 259.0 hectare (ha)

square mile (mi2

) 2.590 square kilometer (km2) 

Radioactivity

picocurie per liter (pCi/L) 0.037 becquerel per liter (Bq/L) 

Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:

°C=(°F-32)/1.8

Vertical coordinate information is referenced to North American Vertical Datum of 1988 

(NAVD 88).

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius 

(μS/cm at 25 °C).

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) 

or micrograms per liter (μg/L). Milligrams per liter is equivalent to parts per million (ppm) and 

micrograms per liter is equivalent to parts per billion (ppb).
ix

Abbreviations

ASL above sea level

CDWR California Department of Water Resources

EM electromagnetic

MCL maximum contaminant level (USEPA)

NFM National Field Manual

NOSAMS National Ocean Sciences Accelerator Mass Spectrometry Facility

NTC (Fort Irwin) National Training Center

NWIS National Water Information System (USGS)

NWQL National Water Quality Laboratory, Denver, Colorado (USGS)

QC quality-control

RSD relative standard deviation

SD standard deviation

SP spontaneous potential

STIL Stable Isotope Laboratory, Reston, Virginia

TDS total dissolved solids

USGS U.S. Geological Survey
x

Well-Numbering and Naming System

Wells are assigned a state well number (station name) by the California Department of Water Resources 

according to the location in the rectangular township and range grid system for the subdivision of public 

lands. Station names consist of the township number, north or south; the range number, east or west; 

and the section number. Each section is divided into sixteen 40-acre tracts lettered consecutively (except 

“I” and “O”), beginning with “A” in the northeast corner of the section and progressing in a sinusoidal 

manner to “R” in the southeast corner. Within the 40-acre tract, numbers are assigned sequentially in 

the order the wells are inventoried. The next letter within the station name refers to the base line and 

meridian. California has three base lines and meridians—Humboldt (H), Mount Diablo (M), and San 

Bernardino (S). Wells in the study area are referenced to the San Bernardino and Mount Diablo base line 

and meridian (S and M). Well numbers consist of 15 characters and follow the format 012N003E01M001S. 

In this report, wells are abbreviated and written as 12N/03E-01M1S. Wells are abbreviated in figures by 

their section number, tract letter, and sequence number (for example, 1M1). In addition to a station name 

assigned by the California Department of Water Resources, wells were assigned a common name derived 

from the basin in which they were installed and a sequence number. Wells were also assigned a 15-digit 

site identification number in the U.S. Geological Survey National Water Information System database.

D C B A

E F G H

M L JK

N P RQ

6 5 4 3 2

7 8 9 10 11

18 17 16 15 13

19 20 21 22 23 24

30 29 28 26 25

31 32 33 34 36

27

R4E R5E

T12N

T13N

T14N

R3E

RANGE

TOWNSHIP

R2ER1E

T15N

T16N R3E

Well-numbering diagram (Note: maps in this report use abbreviated well numbers such as "6L2".)

SECTION 6

T15N

15N/3E-6L2

1

San Bernardino Meridian

12

14

35
Abstract

Because of increasing water demands at the U.S. Army 

Fort Irwin National Training Center, the U.S. Geological 

Survey in cooperation with the U.S. Army carried out a study 

to evaluate the water quality and potential groundwater supply of undeveloped basins within the U.S. Army Fort Irwin 

National Training Center. In addition, work was performed in 

the three developed basins—Langford, Bicycle, and Irwin—

proximal to or underlying cantonment to provide information 

in support of water-resources management and to supplement 

monitoring in these basins. Between 2009 and 2012, the U.S. 

Geological Survey installed 41 wells to expand collection of 

water-resource data within the U.S. Army Fort Irwin National 

Training Center. Thirty-four monitoring wells (2-inch diameter) were constructed at 14 single- or multiple-well monitoring sites and 7 test wells (8-inch diameter) were installed. The 

majority of the wells were installed in previously undeveloped 

or minimally developed basins (Cronise, Red Pass, the Central 

Corridor area, Superior, Goldstone, and Nelson Basins) proximal to cantonment (primary base housing and infrastructure). 

Data associated with well construction, water-level monitoring, and water-quality sampling are presented in this report.

Introduction

The U.S. Army Fort Irwin National Training 

Center (NTC), approximately 35 miles (mi) north-northeast 

of Barstow, California, is comprised of 13 groundwater basins 

(fig. 1). Currently (2012), the NTC withdraws all its potable 

water from three basins (Irwin, Langford, and Bicycle Basins) 

located proximal to the cantonment area where all base 

housing and substantial infrastructure is located. Extraction 

of groundwater at the NTC began as early as 1941 in Irwin 

Basin. Since the 1990s, reduced pumping in the Irwin Basin 

and artificial recharge by infiltration of wastewater from Irwin, 

Bicycle, and Langford Basins have caused water levels to stabilize or recover throughout much of the Irwin Basin (Voronin 

and others, 2013). However, water levels have declined 

in Bicycle and Langford Basins. Continued groundwater 

extraction has resulted in the following two unintended 

consequences: (1) land subsidence and earth fissuring, presumably as a result of water-level declines and differential compaction in Bicycle Basin; and (2) elevated total dissolved solid 

(TDS) and nitrate concentrations in Irwin Basin as a result of 

infiltration of treated wastewater (Densmore and Longquist, 

1997; Densmore, 2003). The U.S. Geological Survey (USGS) 

has been working on water-resource studies at Fort Irwin 

since the early 1990s, because planned expansion of the NTC 

could put a further strain on these limited water resources. In 

2010, the USGS entered into cooperative agreements with the 

U.S. Army to conduct a broad study of water resources within 

groundwater basins (focusing primarily on undeveloped 

basins) at the NTC. In addition to collection of new hydrologic 

and drilling data under the 2010 agreement, this broad study 

included compiling hydrologic data and data from drilling 

performed in 2004 and 2009 under previous agreements.

Various land-based and air-based geophysical techniques 

were used to evaluate all the groundwater basins prior to 

drilling, and results of these evaluations will be presented 

in a separate report (David Buesch, U.S. Geological Survey, 

written commun., 2012). Drilling and well installation were 

concentrated in undeveloped or minimally developed basins. 

Multi-depth monitoring wells and test wells were installed in 

Bicycle, Langford, Cronise, Red Pass, the Central Corridor 

area, Superior, Goldstone, and Nelson Basins to help evaluate the long-term availability and quality of water resources 

within the NTC.

Construction, Water-Level, and Water-Quality Data for 

Multiple-Well Monitoring Sites and Test Wells, Fort 

Irwin National Training Center, San Bernardino County, 

California, 2009–12

By A.R. Kjos, J.N. Densmore, J.M. Nawikas, and A.A. Brown
2 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Hydrogeologic Setting

The NTC is in the Mojave Desert region of southern 

California. It is approximately 130 mi northeast of Los 

Angeles and approximately 35 mi north-northeast of Barstow, 

Calif. The NTC covers approximately 1,070 square miles 

(mi2) and includes ten groundwater basins whose boundaries 

are defined by the California Department of Water Resources 

(CDWR): Riggs Valley, Red Pass Valley, Bicycle Valley, 

Avawatz Valley, Leach Valley, Cronise Valley, Langford 

Valley, Coyote Lake Valley, Goldstone Valley, and Superior 

Valley Basin (California Department of Water Resources, 

2003). For the purposes of this report, these basins have 

been broken up into 13 basins and subbasins, referred to as 

Riggs (Riggs Valley), Red Pass (Red Pass Valley), the Central 

Corridor area (Red Pass Valley), Bicycle (Bicycle Valley), 

Nelson (Bicycle Valley), Drinkwater (Avawatz Valley), Leach 

(Leach Valley), Cronise (Cronise Valley), Langford (Langford 

Valley), Irwin (Langford Valley), Coyote (Coyote Lake 

Valley), Goldstone (Goldstone Valley), and Superior (Superior 

Valley) Basin (fig. 1). 

Limited natural recharge to these basins occurs as 

precipitation runoff and infiltration, along ephemeral washes 

and near the base of the surrounding hills, primarily during 

winter rains or short summer thunderstorms (Densmore 

and Londquist, 1997). No perennial streams are present on 

the NTC (Mendez and Christensen, 1997). Limited official 

precipitation data are available for the basins on the NTC; the 

most current data from the Goldstone ECHO 2, Calif., weather 

station (043498) in Goldstone Basin from December 01, 

1973, to July 31, 2006, indicate an average annual precipitation of 5.80 (inch) in. (Western Region Climate Center, 2009). 

Because of similar climatic conditions across the basins, 

similar precipitation values are expected for all basins on the 

NTC. The Bicycle, Langford, and Irwin Basins, listed in order 

of most temporally active pumping, currently (2012) supply 

all potable water to the NTC. For the purpose of this report, 

only the basins and subbasins in which wells were constructed 

for this part of the study (Bicycle, Nelson, Langford, Superior, 

Goldstone, Cronise, Red Pass, and the Central Corridor area) 

are discussed (fig. 2). 

CDWR defines the Bicycle Valley Basin as having a 

surface area of approximately 140 mi2

 and encompassing 

the Nelson and Bicycle Valleys (California Department of 

Water Resources, 2003). This report divides the Bicycle 

Valley Basin into Bicycle and Nelson subbasins, referred to as 

Bicycle Basin and Nelson Basin, respectively. Bicycle Basin is 

bounded to the northwest and northeast by low-lying unnamed 

granitic and volcanic hills and to the east by the Tiefort Mountains (fig. 2). To the south, low-lying hills separate Bicycle 

Basin from Irwin Basin (California Department of Water 

Resources, 2003). Bicycle Lake (dry), a playa, lies in the 

southern part of the basin (fig. 2). The floor of Bicycle Basin 

ranges in elevation from approximately 2,350 feet (ft) above 

sea level (ASL) at the playa to about 2,600 ft ASL at the base 

of Tiefort Mountain (fig. 2). Surface runoff drains internally 

to Bicycle Lake; however, there is underflow from Bicycle 

Basin to the east of Bicycle Lake through fractured rock in the 

faulted area along the southeastern edge of the playa (Diane 

Rewis, U.S. Geological Survey, written commun., 2010). 

Nelson Basin is bounded to the north and east by the 

Granite Mountains, to the southwest by Tertiary volcanic 

highlands, and to the south-southeast by low-lying granitic 

and volcanic hills separating it from Central Corridor area 

and Bicycle Basin, respectively (fig. 2). A surficial drainage 

divide forms a part of the eastern boundary (Jennings and 

others, 1962). The basin elevation ranges from approximately 

3,050 ft ASL at Nelson Lake (dry), a playa, to approximately 

3,400 ft ASL in the southwest of the basin. Surface runoff 

drains from the Tertiary volcanic highlands and Granite Mountains to Nelson Lake (dry) and McLean Lake (dry), a playa, 

in the central and northern part of the basin, respectively, and 

along an ephemeral wash that terminates at Bicycle Lake (dry) 

in the southeastern part of Bicycle Basin (fig. 2). 

Langford Valley Basin is subdivided into two subbasins 

by the CDWR—Langford Well Lake and Irwin—and for the 

purposes of this report, these subbasins are referred to as the 

Langford and Irwin Basins, respectively. The Langford Basin 

has a surface area of approximately 30 mi2

 (California Department of Water Resources, 2003; Densmore and Londquist, 

1997). The Langford Basin is bounded to the northeast by 

low-lying hills at the base of the Tiefort Mountains, to the 

northwest by low-lying hills separating it from Irwin Basin, to 

the west by Noble Dome, and to the south by Alvord Mountain 

(fig. 2). To the east, the low-lying hills form a drainage divide 

that separates Langford Basin from Cronise Basin. Langford 

Well Lake (dry), a playa (fig. 2), is in the northeastern part of 

the basin. The basin ranges in elevation from approximately 

2,160 ft ASL at Langford Well Lake to approximately 2,800 ft 

ASL at the base of Alvord Mountain. Surface runoff drains 

to Langford Well Lake, but the low permeability of the playa 

sediments impedes groundwater recharge. Groundwater flows 

from Irwin Basin into Langford Basin beneath an unnamed 

wash paralleling the Garlic Spring Fault (Densmore and 

Londquist, 1997; fig. 2). Groundwater also flows though a 

heavily faulted zone out of the basin beneath the low-lying 

drainage divide east of the Langford Well Lake (Voronin and 

others, 2013).

Superior Valley Basin, referred to as Superior Basin for 

the purpose of this report, has a surface area of approximately 

188 mi2

 (California Department of Water Resources, 2003). 

The basin is bounded to the north by Eagle Crags, to the east 

and southeast by low-lying hills dividing Superior Basin from 

Goldstone Basin and Coyote Basin, to the south by Lane 

Mountain and Opal Mountain, and to the west by Slocum 

Mountain (fig. 2; California Department of Water Resources, 

2003). The basin ranges in elevation from approximately 

2,990 ft ASL at Superior Lake (dry), a playa, to approximately 

3,400 ft ASL at the base of Eagle Crags. Superior Lake (dry) 

is the eastern most of three playas in the south-central part of 

the basin where surface runoff drains internally (fig. 2). The 

middle playa is informally referred to as Inferior Lake by NTC 

personnel (fig. 2).
Drilling Procedures and Associated Construction Data 3

Goldstone Valley Basin, referred to as Goldstone Basin 

for the purpose of this report, has a surface area of approximately 44 mi2

 (California Department of Water Resources, 

2003). The basin is bounded to the west and southwest by 

consolidated nonwater-bearing rocks of the Goldstone Hills 

and to the north, east, and south by Tertiary volcanic and 

pyroclastic hills (fig. 2). The basin ranges in elevation from 

approximately 3,025 ft ASL at Goldstone Lake (dry), a playa, 

to approximately 3,700 ft ASL at the southwestern end of the 

basin. Surface runoff drains internally to Goldstone Lake in 

the northern part of the basin (fig. 2).

Cronise Valley Basin (alternatively spelled Cronese), 

referred to as Cronise Basin for the purpose of this report, has 

a surface area of approximately 198 mi2 (California Department of Water Resources, 2003). The basin is bounded to 

the west by low-lying hills separating Cronise Basin from 

Langford Basin, to the east and northeast by the Soda Mountains, and to the north-northwest by Tiefort Mountains (fig. 2; 

California Department of Water Resources, 2003). The basin 

extends south beyond the edge of the NTC to a low point at 

the eastward extension of the Alvord and Cronise Mountains 

near West and East Cronise Lakes (dry), playas (fig. 2). The 

basin ranges in elevation from 1,065 ft ASL at West Cronise 

Lake to 2,500 ft ASL in the northern part of the basin. Surface 

runoff drains internally to West and East Cronise Lakes in the 

southeastern part of the basin (fig. 2).The heavily faulted, lowlying drainage divide east of Langford Lake allows subsurface 

underflow into the basin (fig. 2).

The Red Pass Valley Basin, including the Central 

Corridor area, has a surface area of approximately 250 mi2

(California Department of Water Resources, 2003). For this 

report, the Red Pass Basin is divided into the Red Pass subbasin in the east and the Central Corridor area subbasin in the 

west, referred to as Red Pass Basin and the Central Corridor 

area, respectively. The Red Pass Basin is bounded to the north 

by the Avawatz Mountains, to the east by low-lying hills that 

separate Red Pass Basin from the Riggs Basin, to the south by 

the Soda Mountains, and to the southeast by low-lying hills 

that separate Red Pass Basin from Cronise Basin (fig. 2; California Department of Water Resources, 2003). A low rise to 

the northwest separates Red Pass Basin from the Central Corridor area, which is bounded to the north by the Granite Mountains and to the south by the Tiefort Mountains and low-lying 

hills that separate Central Corridor area from Cronise Basin. 

Surface runoff flows from the Granite Mountains through the 

Central Corridor area into Red Pass Basin from the west and 

from the Avawatz Mountains in the north. Red Pass, a narrow 

canyon, cuts through the low-lying hills separating Red Pass 

Basin from Riggs Basin to the east and allows surface runoff 

from the northern part of the basin to exit into Riggs Basin 

(California Department of Water Resources, 2003). The basin 

ranges in elevation from approximately 1,600 ft ASL at Red 

Pass to approximately 2,600 ft ASL at the base of Avawatz 

Mountain. Red Pass Lake (dry), a playa (fig. 2), is in the 

southern part of the Red Pass Basin. Red Pass Lake is approximately 1,850 ft ASL and is separated from the northern part 

of the basin by a small rise acting as a barrier to surface-water 

drainage from the north. The southern part of the basin is 

drained internally to Red Pass Lake. The northern part of Red 

Pass Basin is drained externally through Red Pass to the east 

into Riggs Basin.

Purpose and Scope

The purpose of this study was to collect hydrogeologic 

data from new monitoring sites and test wells in basins 

proximal to the cantonment area on the NTC and to supplement data collected in already developed basins. This report 

describes the sites, the construction and data-collection 

methods, and the results associated with the installation of 

14 (2-in. diameter) single-well and multiple-well “nested” 

monitoring sites—2 of which were replacement sites for failed 

or abandoned wells—and 7 test wells (8-in. diameter) within 

the NTC. This report details the construction and data-collection methods for the newly drilled well sites and presents the 

lithologic, borehole-geophysical, water-level monitoring, and 

water-quality sampling data collected.

Drilling Procedures and Associated 

Construction Data

Well drilling, construction, lithologic, core, and boreholegeophysical data were collected from most boreholes drilled 

for this study. The total depth and perforated intervals of well 

casings installed in the boreholes were chosen on the basis of 

the newly collected lithologic and borehole-geophysical data 

and historical data from nearby wells. The lithology of each 

borehole was described initially in the field on the basis of 

cuttings and cores retrieved during drilling. Descriptions were 

subsequently modified after site completion on the basis of an 

examination of the cuttings and core sub-samples using a binocular microscope. Generally, borehole-geophysical logs were 

conducted after the drilling of each borehole at a previously 

unlogged location and prior to well construction.

Well Drilling and Construction

During 2009–12, 14 multiple-well or single-well 

monitoring sites and 7 test wells were drilled on the NTC. 

Sites LL04B (12N/03E-01M4S, -01M5S) and BLA5B 

(14N/03E-26K4S) contained replacement wells for failed and 

abandoned wells (fig. 2). The wells were installed in eight 

basins (Bicycle, Langford, Cronise, Red Pass, Central Corridor 

area, Superior, Goldstone, and Nelson). Boreholes were drilled 

using a mud-rotary method. Sites were chosen where previous 

depth-dependent lithologic, borehole-geophysical, water-level, 

and water-quality data were unavailable or limited. Diameters 

of the boreholes ranged from 5 to 15 in. Generally, a pilot 

borehole was initially drilled (5- to 10-in. diameter) allowing 
4 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

geophysical logs to be collected in a smaller diameter hole, 

improving their quality. Typically, a full suite of boreholegeophysical logs were run for each borehole before wells were 

constructed. Analyses of lithologic and geophysical data were 

used to determine the number, diameter, type of well(s), and 

depths of screened intervals to be placed in each borehole. 

If necessary, boreholes were reamed to enlarge them up to a 

15-in. diameter, depending on the number and diameter of the 

well casing(s) placed in each borehole. Generally, the larger 

diameter boreholes contained test wells, which were larger in 

diameter. One to three wells were installed in each borehole. 

Well construction began with the casing and screen being 

placed in the borehole to the desired depth. Well casings 

varied from approximately 2 to 8 in. in diameter, dependent 

on whether it was a single- or multiple-well monitoring site 

or a test well. Test wells were constructed with multiple 

screen intervals. Adjacent to and extending above and below 

the screened intervals, the boreholes were packed with #3 

Monterey sand, medium aquarium Monterey sand, and (or) 

gravel, dependent on whether it was a monitoring site or test 

well. Larger aggregate and screen openings were typically 

used for test wells to allow for greater flow. Sand-packed 

intervals in each borehole were isolated by bentonite grout 

(30 percent solids) pumped into the annular space, timerelease bentonite pellets, and (or) bentonite chips. In the 

multiple-well monitoring sites, this method was repeated for 

each well. The bentonite seal was extended to land surface in 

all boreholes except RDPS (15N/06E-33L1S), where a surface 

cement seal was placed above the bentonite seal. Well sites 

were protected and secured by a flush-mount traffic-rated 

vault, manhole, or steel stove-pipe with a cement pad. Wellconstruction data are given in table 1. Diagrams of the well 

construction for the monitoring and test sites are shown in 

figures 3–21.

Lithologic Data

In addition to onsite description of cuttings and cores, the 

drill cuttings were later examined in more detail at the USGS 

San Diego Projects Office, San Diego, Calif., under a binocular microscope, using the Folk (1954) classification (fig. 22) 

and a Munsell soil color chart (Munsell Color, 1998, 2000). 

For each site, lithology of the drill cuttings and core “shoe” 

samples was described. Drill cuttings were collected by the 

following two methods: (1) “sieved” samples were collected 

throughout a 20-ft interval from the returning drilling fluid by 

using a 120-mesh [125-micrometer (μm)] U.S.A. Standard 

Testing Sieve; and (2) “shaker” samples were collected as grab 

samples every 10 ft from the 20 mesh (841-μm) shaker screen, 

which is the initial phase of the drilling fluid recycling process. 

Sieved samples represent a composite of finer-grained material 

from the entire 20-ft drilling interval, whereas shaker samples 

represent the coarser-grained material at discrete points. Cores 

were collected in most boreholes, and their depths are depicted 

in figures 3–21. Additionally, core depths and a description 

of the bottom of the core or “shoe” and occasionally the top 

of the core were also described and included in the shaker 

lithologic log. Cores were typically collected after major 

lithologic changes and at the bottom of the hole, at the discretion of the project chief. Rounding and sorting classification 

of lithologic samples was determined on the basis of visual 

examination under a binocular microscope. Separate lithologic 

logs of shaker and sieve cuttings for all sites, except replacement well sites, are presented in tables 2–20. The lithologic 

information in figures 3–21 is summarized from the notes of 

the onsite geologist, geophysical logs, and subsequent microscope examination of the drill cuttings and is generalized for 

presentation purposes.

Geophysical Logs

In addition to lithologic logs, a suite of geophysical 

logs were collected from the boreholes at most sites to 

aid in selecting screened intervals for construction of the 

wells (figs. 3–21). Geophysical logs were not collected at 

new sites LL04B (12N/03E-01M4S, -01M5S), BLA5B 

(14N/03E-26K4S), and SBMW (31S/46E-05B2M, 

-05B3M) because log data existed for already established 

sites LL04 (12N/03E-01M1S, -01M2S, -01M3S), 

BLA5 (14N-03E-26K1S, -26K2S, -26K3S), and SBTW 

(31S/46E-05B1M), which are in close proximity to the 

new sites. Geophysical log data from the established sites 

are combined with well-construction information from the 

new sites and presented in figures 3, 7, and 20. Site RDPS 

(15N/06E-33L1S) did not have electromagnetic induction 

(EM) or sonic logs because of onsite equipment malfunction 

(fig. 14). In all wells, except wells previously mentioned, 

caliper (hole-diameter), electric (temperature, spontaneous 

potential (SP), 16- and 64-in. normal resistivity, and lateral 

resistivity) and sonic (delta-T) tools were used to collect logs. 

Geophysical logs were collected in uncased open boreholes, 

backfilled with drilling mud to prevent collapse and provide 

a consistent medium, before well construction commenced. 

Geophysical tools were calibrated as specified by the manufacturer; the caliper tool was calibrated onsite according to the 

specifications of the borehole. In most cases, especially when 

large diameter (approximately 8 in.) wells were installed, 

a pilot hole was drilled allowing the logs to be collected 

in a smaller-diameter borehole to improve the quality. Site 

GOLD1-T (15N/01E-28R4S) was an exception; a pilot hole 

was not drilled because it was in close proximity to GOLD1 

(15N/01E-28R1S, -28R2S, -28R3S), where a geophysical log 

was previously collected. 

Down-hole caliper logging tools measured the inside 

diameter of the open borehole. The caliper log allowed for the 

detection of any “wash-out zones” where unconsolidated sand 

had been washed away by the drilling process and also aided 

in identifying zones in which a clay unit might have expanded 

because of a decrease in down-hole pressure. In addition, the 

caliper log was used to determine the quantity of sand and 

grout needed to fill the annular space during the construction 

of the observation wells. 
Water-Level and Water-Quality Methods And Data 5

The electric logging tools measured the electrical properties of the formation around the borehole and the fluid in the 

formation. SP, normal-resistivity (16- and 64-in.), and lateral 

resistivity logs were used to distinguish fine-grained silt and 

clay from coarser sand and gravel. In freshwater systems, 

sand and gravel beds were indicated by a negative deflection (toward the left) on the SP log and by a high resistivity 

response (toward the right) on the resistivity logs. 

The EM tools were used primarily to identify lithologic 

indicators and to provide geologic correlations. Naturalgamma logs measured the intensity of gamma-ray emissions 

from materials with high concentrations of potassium-40, 

uranium-238, uranium-235, and thorium-232. Generally, 

clay and potassium-feldspar-rich gravel have more intense 

gamma-ray emissions than gravels containing less potassium feldspar (Schlumberger Limited, 1972; Hearst and 

Nelson, 1985; Driscoll, 1986). Limestone and quartz-rich 

sandstones will yield lower gamma-ray values. Conductivity 

logs also provided a continuous log of the conductance of the 

aquifer material. In freshwater systems, sand and gravel beds 

were indicated by a negative deflection (toward the left) on 

conductivity logs.

The sonic tools measured the velocity of an acoustic 

pulse between a transmitter and a receiver on the tool with 

depth, recording an interval transit time (Delta-T). Sonic logs 

were useful in identifying contrasting lithologies. The sonic 

logs gave an indication of the degree of consolidation of the 

formation, as well as an approximate location of the water 

table.

Water-Level and Water-Quality 

Methods And Data

Water levels were periodically measured from all wells 

installed, and water-quality samples were collected at most 

wells and analyzed for selected constituents. Water-quality 

samples at each site were collected after well construction was 

completed. All water-level and water-quality data are available through the USGS National Water Information System 

(NWIS) web interface at http://water.usgs.gov/nwis/. NWIS 

web is an interface to a database of site information, real-time, 

groundwater, surface-water, and water-quality data collected 

from locations throughout the United States and elsewhere. 

Data are updated from the USGS database at regularly 

scheduled intervals.

Water-Level Methods and Data

Water levels were measured in wells on an approximately bi-annual basis and prior to collecting the waterquality sample. Water levels were measured and recorded 

to within 0.01 ft using a calibrated electric or steel tape. 

Representative water-level data for the sites are presented in 

table 21; all water-level data are available using NWIS and 

can be accessed via hyperlinks in table 21. No hydrographs 

are presented in this report because of limited water-level 

data collected over time. The failed and abandoned wells 

LL04 #2 and #3 (12N/03E-01M2S, -01M3S) and BLA5 #2 

(14N/03E-26K2S) do not have water-level data. Additionally, water levels may not be representative for CRTH1 #2 

(13N/05E-28Q2S) because the grout reacted with the highsalinity formation water and started infiltrating the sand pack. 

Water levels for GOLD2 #3 (14N/01E-07R3S) may not be 

representative of the surrounding aquifer because the well had 

low flow rates and could not be adequately developed and is 

hypothesized to be in a perched zone.

Water-Quality Methods and Data

Groundwater samples were collected and processed by 

USGS personnel following the protocols established by the 

USGS National Field Manual (NFM; U.S. Geological Survey, 

variously dated). These sampling protocols are designed to 

ensure a representative sample of groundwater is collected and 

potential contamination of samples during collection and handling is minimized. All monitoring wells were sampled using 

either a Bennett or Keck pump with Teflon tubing. Test wells, 

which had multiple perforated intervals, were sampled for 

bulk discharge (contributions from all the perforated intervals) 

or depth-dependent samples (contributions from individual 

perforated intervals). Test well SBTW (31S/46E-05B1M) was 

sampled using a Bennett pump with Teflon tubing. The bulk 

discharge samples for all other test wells were collected using 

a submersible pump with steel pipe. The depth-dependent 

samples were collected under typical pumping conditions 

using a small-diameter gas displacement pump developed for 

depth-dependent sampling (Izbicki, 2004). The depth-dependent samples represent a composite of all flow entering the 

perforated interval below the sample point if the pump intake 

of the test well was above the sample point or a composite of 

all flow entering the perforated interval above the sample point 

if the pump intake was below the sample point. Although, the 

tracer-pulse method of Izbicki and others (1999) was used to 

collect flow profiles of most of the test wells, these profiles 

are not presented in this report, and concentrations in the 

depth-dependent samples were not corrected for flow. Sampling equipment was cleaned after samples were collected at 

each well to prevent cross-contamination between wells (U.S. 

Geological Survey, variously dated). 

Groundwater samples were sent to the National Water 

Quality Laboratory (NWQL) in Denver, Colorado, for analysis 

of major ions, nutrients, and selected trace elements, using 

methods by Fishman and Friedman (1989), Fishman (1993), 

and Garbarino and others (2002, 2006), respectively. Additionally, selected samples were sent to the Stable Isotope 

Laboratory (STIL) in Reston, Virginia, for analysis of the 

stable isotopes of oxygen (δ18O) and hydrogen (δD) by using 

mass spectrometry (Epstein and Mayeda, 1953; Coplen and 

others, 1991) and were sent to the Woods Hole Oceanographic 

Institute, National Ocean Sciences Accelerator Mass 
6 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Spectrometry Facility (NOSAMS), for analysis of inorganic 

carbon (δ13C) and carbon-14 (14C) by using mass spectrometry 

(Vogel and others, 1987; Donahue and others, 1990; McNichol 

and others, 1992, 1994; Gagnon and Jones, 1993; Schneider 

and others, 1994). Tritium was analyzed with a detection limit 

of 0.3 to 0.5 picocurie per liter (pCi/L), dependent on sample 

volume, using an electrolytic enrichment-liquid scintillation 

method at the University of Miami Tritium Laboratory or 

the USGS Isotope Tracer Laboratory in Menlo Park, Calif. 

(Ostlund and Warner, 1962; Thatcher and others, 1977; 

Beukens, 1992). A summary of available water-quality data 

for well sites is presented in table 22; all data are available 

using NWIS and can be accessed via hyperlinks in table 22. 

The benchmark levels for all constituents in the summary 

are presented in table 22 and are based on drinking-water 

thresholds by the U.S. Environmental Protection Agency and 

the California Department of Public Health as presented by 

Mathany and others (2012). The upper secondary maximum 

contaminant level (MCL) was used for specific conductance, 

chloride, sulfate, and total dissolved solids. Results that 

exceeded benchmark levels in table 22 are in bold. The failed 

and abandoned wells LL04 #2 and #3 (12N/03E-01M2S, 

-01M3S) and BLA5 #2 (14N/03E-26K2S) do not have waterquality data. Additionally, GOLD2 #3 (14N/01E-07R3S), 

CRTH1 #2 (13N/05E-28Q2S), and CCT1 #3 (15N/03E25L3S) were not sampled because low flow rates and influx of 

formational silt did not allow for sufficient purging of the well 

as required by the NFM.

Quality-Control Methods and Data

Quality-control (QC) samples help to identify which 

data best represents environmental conditions and which 

data may have been affected by contamination or bias during 

sample collection, processing, storage, transportation, and (or) 

laboratory analysis. Two of the most common QC samples 

are blanks and replicates. In addition to blanks and replicates, 

other data comparisons can be useful in interpreting the quality of the data and are discussed in this section.

Blank Samples

The primary purposes of collecting blank samples are 

to evaluate the magnitude of potential contamination of 

samples with compounds of interest during sample handling 

or analysis. Blanks are not feasibly collected for isotopic 

ratios. Isotopic ratios of hydrogen, oxygen, and carbon are 

an intrinsic property of these elements; therefore, the concept 

of a blank does not apply to these ratios. In addition, blanks 

were not collected for tritium. Tritium is ubiquitous in water 

in contact with the modern atmosphere, and tritium blank 

water is not readily available, making it impractical to collect a blank for tritium. However, tritium was not reported to 

be present above the detection limit in most samples, which 

demonstrates the ability to collect samples without influence 

from near-surface sources of tritium. No blanks were collected for this study; however, previous and concurrent USGS 

studies performed with the same methods used for this study 

have demonstrated that samples (including blanks) for major 

and minor elements, nutrients, and most trace elements are 

routinely collected and analyzed without sample bias (for 

example, Schmitt and others, 2009; Mathany and others, 

2012). Olsen and others (2009) discuss analysis of extensive 

field blank data sets from studies of groundwater in California 

using the same methods as were used in this study to quantify 

low-level bias in trace-element data. The study reporting levels 

developed by Olsen and others (2009) were used in reporting 

the results for trace elements for this study.

Replicate Samples

Sequential replicate samples were collected to assess the 

precision of the water-quality data. Estimates of data precision 

are needed to assess whether differences between concentrations in samples occur because of differences in groundwater 

quality or because of variability that may result from collecting, processing, and analyzing the samples. 

Replicate Analysis

The acceptable limit for the difference in measured concentrations between replicate paired samples was determined 

using one of two criteria. The criterion selection depended on 

the magnitude of the measured concentration of a constituent 

relative to its reporting level. If the concentration of a constituent was measured at less than five times its reporting level, a 

standard deviation (SD) for the sample pair of less than half 

the reporting level was considered acceptable. If the measured 

concentration of a constituent was greater than or equal to five 

times its reporting level, a relative standard deviation (RSD) 

of less than 10 percent was considered acceptable. The RSD is 

defined as the SD divided by the mean concentration for each 

replicate pair of samples expressed as a percentage. An RSD 

of less than 10 percent was also used for isotopes, with the 

exception of tritium and carbon-14. There are no replicate data 

for tritium and carbon-14.

Replicate Results

Three replicate sample pairs were collected throughout 

the course of this study. One bulk discharge pair was collected from wells BLA5 #1 (14N/03E-26K1S), NELT4 #1 

(15N/03E-08L1S), and NELT3 #1 (16N/02E-31H1S). Replicate results were evaluated for 32 analyses. Two replicates 

showed unacceptable variability for iron. The iron concentrations for both these samples were less than five times the 

reporting level, and both replicate pairs were from test wells 

where steel pipe was used along with a submersible pump to 

collect the bulk discharge samples. One replicate pair also 

showed unacceptable variability for manganese and nitrite; 

both these constituents were greater than five times the reporting level and had a RSD of greater than 10 percent. In all 
References Cited 7

cases in which iron, manganese, and nitrite replicate results 

did not meet variability thresholds, concentrations were more 

than a factor of 10 less than drinking-water thresholds (U.S. 

Environmental Protection Agency, 2013). All other analyses 

were within acceptable limits for all three replicate pairs.

Sample Comparisons to Sum of Major 

Constituents

Other means were used to evaluate the quality of the 

data and detect potential sources of error including an analysis of the sum of major constituents versus dissolved solids 

[residue on evaporation at 180 degrees Celsius (°C)], and 

the sum of major constituents versus specific conductance, 

unfiltered (field). The sum of the major constituents analyzed 

(calcium, magnesium, potassium, sodium, bromide, chloride, 

fluoride, silica, sulfate, and nitrate + nitrite) should show a 

linear relation to the dissolved solids (residue on evaporation 

at 180 °C) and to specific conductance, unfiltered (field). Both 

these values are independent of the major constituent analyses 

performed by the laboratory and can be used as a check of the 

quality of those analyses. Nearly all samples with complete 

data showed a linear relation for both independent comparisons; a single exception is discussed below (fig. 23).

NELT2 #2 (15N/03E-06L2S) was found to have abnormally high dissolved solids relative to the sum of major 

constituents (fig. 23). However, the relation between specific 

conductance and the sum of major constituents for NELT #2 

followed the linear trend of the other samples. The dissolvedsolids analysis for the NELT #2 (15N/03E-06L2S) sample was 

likely erroneous. NELT2 #2 (15N/03E-06L2S) lacked nutrient data, but it is unlikely that nutrient concentrations would 

have been high enough to substantially increase the sum of 

major constituents. NELT2 #2 would not have fit within the 

linear relation even with the addition of nitrate + nitrite. The 

high dissolved-solids result was likely because of a filter break 

during sample collection (likely after collection of the sample 

for trace elements but before collection of the sample for dissolved solids), skewing the results. The concentration of dissolved solids in table 22 is an approximation of what the result 

should have been and was calculated using a linear-regression 

method based on the trend of the rest of the dissolved-solids 

data for the sample set. The specific conductance of the 

sample from CRTH2 #2 (13N/05E-08B2S) was not compared 

because it was so high it was outside the calibration range 

of the meter and was only estimated. However, the relation 

between the sum of major constituents and the dissolved solids 

for CRTH2 #2 (13N/05E-08B2S) plots along the same linear 

trend as the rest of the samples (fig. 23), demonstrating consistency between the analytical analysis and field measurements. 

Two depth-dependent samples from NELT3 #1 (16N/02E31H1S) did not have dissolved-solids data because of the low 

sample volume associated with these types of samples. The 

relation between the sum of major constituents and specific 

conductance for these samples plots along the linear trend with 

other samples.

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024144, 40 p.

Garbarino, J.R., Kanagy, L.K., and Cree, M.E., 2006, Determination of elements in natural-water, biota, sediment, and soil 

samples using collision/reaction cell inductively coupled 

plasma-mass spectrometry: U.S. Geological Survey Techniques and Methods, book 5, sec. B, chap.1, 88 p., http://

pubs.water.usgs.gov/tm5b1.

Hearst, J.R., and Nelson, P.H., 1985, Well logging for physical 

properties: New York, McGraw-Hill, 571 p.

Izbicki, J.A., 2004, A small-diameter sample pump for collection of depth-dependent samples from production wells 

under pumping conditions: U.S. Geological Survey Fact 

Sheet 2004–3096, 2 p., http://pubs.usgs.gov/fs/2004/3096/.

Izbicki, J.A., Christensen, A.H., Hanson, R.T., Martin, Peter, 

Crawford, S.M., and Smith, G.A., 1999, U.S. Geological 

Survey combined well-bore flow and depth-dependent water 

sampler: U.S. Geological Survey Fact Sheet 196–99, 2 p., 

http://pubs.usgs.gov/fs/1999/fs19699/.

Jennings, C.W., Burnett, J.L., and Troxel, B.W., comps., 1962, 

Geologic map of California—Trona sheet: California Geological Survey, Geologic Atlas of California, mpa no. 023, 

scale 1:250,000.

Mathany, T.M., Wright, M.T., Beuttel, B.S., and Belitz, 

Kenneth, 2012, Groundwater-quality data in the Borrego 

Valley, central desert, and low-use basins of the Mojave and 

Sonoran Deserts study unit, 2008–2010—Results from the 

California GAMA Program: U.S. Geological Survey Data 

Series 659, 100 p., http://pubs.usgs.gov/ds/659/.

McNichol, A.P., Gagnon, A.R., Jones, G.A., and Osborne, 

E.A., 1992, Illumination of a black box—Analysis of gas 

composition during graphite target preparation: Radiocarbon, v. 34, no. 3, p. 321–329.

McNichol, A.P., Jones, G.A., Hutton, D.L., Gagnon, A.R., and 

Key, R.M., 1994, The rapid preparation of seawater ΣCO2 

for radiocarbon analysis at the National Ocean Sciences 

AMS Facility: Radiocarbon, v. 36, no. 2, p. 237–246.

Mendez, G.O., and Christensen, A.H., 1997, Regional water 

table (1996) and water-level changes in the Mojave River, 

and Morongo, and the Fort Irwin groundwaters basins, San 

Bernardino County, California: U.S. Geological Survey 

Water-Resources Investigations Report 97–4160, 34 p.

Munsell Color, 1998 and 2000, Munsell soil color charts: Baltimore, Md., Munsell Color, X-Rite, Incorporated.

Olsen, L.D., Fram, M.S., and Belitz, Kenneth, 2009, Review 

of trace-element field-blank data collected for the California Groundwater Ambient Monitoring and Assessment 

(GAMA) Program, May 2004–January 2008: U.S. Geological Survey Scientific Investigations Report 2009–5220, 47 

p., http://pubs.usgs.gov/sir/2009/5220/.

Ostlund, H.G., and Warner, E., 1962, Electrolytic enrichment 

of tritium and deuterium for natural tritium measurements, 

in Tritium in the physical and biological sciences: Vienna, 

Austria, International Atomic Energy Agency, v. 1, p. 

96–104.

 Schlumberger, Limited, 1972, Log interpretation, v. 1—Principles: New York, Schlumberger Limited, 112 p.

Schmitt, S.J., Milby Dawson, B.J., and Belitz, Kenneth, 2009, 

Groundwater-quality data in the Antelope Valley study unit, 

2008—Results from the California GAMA program: U.S. 

Geological Survey Data Series 479, 79 p., http://pubs.usgs.

gov/ds/479/.

Schneider, R.J., Jones, G.A., McNichol, A.P., von Reden, 

K.F., Elder, K.L., Huang, Kelan, and Kessel, E.D., 1994, 

Methods for data screening, flagging, and error analysis at 

the National Ocean Sciences AMS Facility: Nuclear Instruments and Methods in Physics Research, v. 92, no. 1-4, p. 

172–175.
References Cited 

9

Thatcher, L.L., Janzer, V.J., and Edwards, K.W., 1977, Meth-

ods for determination of radioactive substances in water 

and fluvial sediments: U.S. Geological Survey Techniques 

of Water Resources Investigations, book 5, chap. A5, 95 p., 

http://pubs.water.usgs.gov/twri5a5.

U.S. Environmental Protection Agency, 2013, Drinking water 

contaminants: U.S. Environmental Protection Agency, 

accessed May 3, 2013, at http://www.epa.gov/safewater/

contaminants/index.html.

U.S. Geological Survey, variously dated, National field man-

ual for the collection of water-quality data: U.S. Geological 

Survey Techniques of Water-Resources Investigations, book 

9, chaps. A1–A9, available online at http://pubs.water.usgs.

gov/twri9A.

Vogel, J.S., Nelson, D.E., and Southon, J.R., 1987, 14C back-

ground levels in an accelerator mass spectrometry system: 

Radiocarbon, v. 29, no. 3, p. 323–333.

Voronin, L.M., Densmore, J.N., Martin, Peter, Brush, C.F., 

Carlson, C.S., and Miller, D.M., 2013, Geohydrology, 

geochemistry, and groundwater simulation (1992–2011) 

and analysis of potential water-supply management options, 

2010–60, of the Langford Basin, California: U.S. Geologi-

cal Survey Scientific Investigations Report 2013–5101, 

86 p., http://pubs.er.usgs.gov/publication/sir20135101.

Western Region Climate Center, 2009, Goldstone ECHO 2—

California (043498) Period of Record Monthly Climate 

Summary December 01, 1973, to July 31, 2006: Western 

Region Climate Center database, accessed September 

27, 2012, at http://www.wrcc.dri.edu/cgi-bin/cliMAIN.

pl?ca3498.
10 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figures
Figures 11Figure 1. Location of study area, production wells, and groundwater basins within Fort Irwin National Training Center, California.

15

?

?

?

?

?

?

?

?

?

?

?

?

?

Tiefort 

Mountains

Cantonment

Noble 

Dome

Alvord Mountain

Granite Mountains

Eagle 

Crags

Lane Mountain

Opal

Mountain

Goldstone 

Hills

Owlshead Mountains

Quail Mountains

Avawatz

Mountains

Soda

Mountains

Red 

Pass

Cronise

Mountain

Paradise

Mountain

116°40’ 117°0’ 116°20’

35°

30’

35°

10’

SUPERIOR

COYOTE

LANGFORD CRONISE

IRWIN

GOLDSTONE

NELSON

BICYCLE

RED PASS

CENTRAL CORRIDOR  AREA

DRINKWATER

LEACH

RIGGS

T

26

S

T

27

S

T

28

S

T

29

S

T

30

S

T

31

S

T

32

S

T

18

N

T

17

N

T

16

N

T

15

N

T

14

N

T

13

N

T

12

N

T

11

N

R1E

R47E R46E R45E

R1W R2W R3W R2E R3E R4E R5E R6E R7E R8E

EXPLANATION

Production well

Major Roads

HighwayLocal roads

Fort Irwin National Training Center boundary

Faults

Approximately locatedConcealedLocation certain

? Queried

Groundwater basinsDry lake (playa)

0 4 8 2 MILES0 4 8 2 KILOMETERS

IP-040406_Fig 01

Base from U.S. Geological Survey digital elevation data, 1:250,000, 1987, and digital data, 1:100,000, 1981-89; Universal Transverse Mercator Projection, Zone 11. Shaded relief base from 1:250,000-scaleDigital Elevation Model; simulated sun illumination from northwest at 30 degrees above horizon

Ft. Irwin

study area

C ALIFORNIA

Pacific Ocean Los Angeles Barstow
12 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 2. Location of study area, groundwater basins, and well locations within Fort Irwin National Training Center, California.

15

?

?

?

?

?

?

?

?

?

?

?

?

?

Tiefort 

Mountains

Noble 

Dome

Alvord Mountain

Granite Mountains

Eagle 

Crags

Lane Mountain

Opal

Mountain

Goldstone 

Hills

Inferior

Lake

Superior

Lake

Goldstone

Lake

Bicycle

Lake

Red Pass

Lake

West

Cronise

Lake East

Cronise

Lake

Langford

Well

Lake

Garlic

Springs

Fault

Nelson

Lake

McLean

Lake

Owlshead Mountains

Quail Mountains

Avawatz

Mountains

Soda

Mountains

Red 

Pass

Cronise

Mountain

Paradise

Mountain

Slocum

Mountain

116°40’ 117°0’ 116°20’

35°

30’

35°

10’

SUPERIOR

COYOTE

LANGFORD CRONISE

IRWIN

GOLDSTONE

NELSON

BICYCLE

RED PASS CENTRAL CORRIDOR AREA

DRINKWATER

LEACH

RIGGS

T

26

S

T

27

S

T

28

S

T

29

S

T

30

S

T

31

S

T

32

S

T

18

N

T

17

N

T

16

N

T

15

N

T

14

N

T

13

N

T

12

N

T

11

N

R1E

R47E R46E R45E

R1W R2W R3W R2E R3E R4E R5E R6E R7E R8E

EXPLANATION

Fort Irwin National Training Center boundary

Faults

Approximately locatedConcealedLocation certain

? Queried

Groundwater basinsDry lake (playa)

0 4 8 2 MILES0 4 8 2 KILOMETERS

5D1 5B2,3

5B1

8L1

6L1–3

5N1

7R1–3

8B1,2

1M1,4,5

34Q1,2

31H1

16P1–3

35P1

33L1

25L1–3 28R4

28R1–3

26K1,3,4

28Q1–3

Well

MonitoringTest

IP-040406_Fig 02

Base from U.S. Geological Survey digital elevation data, 1:250,000, 1987, and digital data, 1:100,000, 1981-89; Universal Transverse Mercator Projection, Zone 11. Shaded relief base from 1:250,000-scaleDigital Elevation Model; simulated sun illumination from northwest at 30 degrees above horizon
Figures 13

Figure 3. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site LL04 

(12N/03E-01M1S, -01M2S, -01M3S) and well-construction diagram for multiple-well monitoring site LL04B (12N/03E-01M4S, -01M5S), 

Fort Irwin National Training Center, California.

No data

1M4, 5

IP040406_FIG03_LL04 and 04B

4c

3c

2c

1c

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 -400 -100

90 95

50 150

Sand

Sandy gravel

Gravelly sand

Clayey gravelly

 sand

Clayey silty sand

Clayey silty

 sand

Clayey silty sand

Clayey silt with

 interbedded

 cemented sand

Cemented sand

Sandy clayey silt

Clayey silty sand

Clayey silty sand

Silty sand

Sandy silty clay

Silty sandy clay

Clay

Gravelly silty

 sand

Gravelly silty

 sand

Gravelly silty

 sand

Gravelly sand

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Conductivity,

in millimhosmeters

0 50 0 50

0 350

1M1-3

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

1,100

Delta t,

in microseconds

per foot

100 300

Silty sand

Total depth

1,019 feet

Wells

1M2,3

sealed and

abandoned

Total depth

520 feet Cored interval

Water level

in well
14 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 4. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site CRTH2 

(13N/05E-08B1S, -08B2S), Fort Irwin National Training Center, California.

1c

3c

Gravelly sand

Sandy gravel

Clayey gravelly

sand

Sandy silty clay

Sandy silty clay

with white clay

(possible

tephra)

Sandy silty clay

with white clay

(possible

tephra) interbeds

Clayey sandy

gravel

Gravelly clayey

sand

Clayey sandy

gravel

Gravelly sandy

silty clay

Sandy silty clay

Sandy silty clay

Silty clayey sand

Sand

Weathered

basalt

Basalt

2c

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 -200 100

86 90

0 250

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Conductivity,

in millimhosmeters

0 50 0 50

0 350

8B1, 2

16-inch

64-inch

0

100

200

300

100

200

300

400

500

600

700

800

900

1,000

Delta t,

in microseconds

per foot

0 1,500

Total depth

965 feet Cored interval

No data

IP040406_FIG04_CRTH2

Water level

in well
Figures 15

Figure 5. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site CRTH1 

(13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training Center, California.

1c

2c

3c

4c

Sandy gravel

Clayey sand

Basalt

Sand

Clayey sand

Sandy clay

Clayey sand

Sandy clay

Sand w/ clay and

silt

Clayey sand

Sand w/ clay, silt

and minor gravel

Clayey sand

Silty clayey sand

Clayey silty sand

Sandy silty clay

Clayey silty sand

Sand

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 300 600

95 110

0 250

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Conductivity,

in millimhosmeters

0 50 0 50

0 350

28Q1−3

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

1,300

Delta t,

in microseconds

per foot

0 500

Total depth

1,301 feet Cored interval

Water level

in well

IP040406_FIG05_CRTH1
16 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 6. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site GOLD2 

(14N/01E-07R1S, -07R2S, -07R3S), Fort Irwin National Training Center, California.

Sandy gravel

Silty sand

Gravelly sand

Gravelly silty

sand

Sandy clayey

gravel

Sandy silt

Silty clayey

sandy gravel

Clayey sandy silt

Sandy clayey

gravel

Sandy gravelly

clayey silt

Clayey sandy

gravel

Gravelly sandy

silty clay

Clayey sandy

gravel

Aphanitic basalt

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 -100 150

89 93

0 200

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Conductivity,

in millimhosmeters

0 50 0 50

0 350

7R1–3

16-inch

64-inch

0

100

200

300

400

500

Delta t,

in microseconds

per foot

0 1,000

Total depth

451 feet

No data

Cored interval

Water level

in well

IP040406_FIG06_GOLD2

1c

2c

4c

3c

Weathered fractured bedrock
Figures 17

Figure 7. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site BLA5 

(14N/03E-26K1S, -26K2S, -26K3S) and well-construction diagram for single-well monitoring site BLA5B (14N/03E-26K4S), 

Fort Irwin National Training Center, California.

Silty clay

Ash (tephra)

Silty Clay

Sandy gravel

Silty clay

Sandy gravel

Silty sandy gravel

Sandy gravel

Silty sandy gravel

Sandy gravel

Clay

Sandy gravel

Clay

Sandy gravel

Sandy gravel

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 -100 150

90 105

50 200

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Conductivity,

in millimhosmeters

0 50 0 50

0 350

26K1–3 26K4

16-in

64-in

0

100

200

300

400

Delta t,

in microseconds

per foot

0 500

No data

IP040406_FIG07_BLA5&5B

Total depth

370 feet

Total

depth

280 feet

Cored interval

Water level

Well 26K2 in well

sealed and

abandoned

Bedrock

0’ - 60’:

Continuous core

1c - 13c

Weathered bedrock
18 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 8. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site GOLD1 (15N/01E28R1S, -28R2S, -28R3S), Fort Irwin National Training Center, California.

1c

2c

3c

Sandy gravel

Gravelly silty

sand

Gravelly sand

Dacite

Sand

Silty gravelly

sand

Gravelly sand

Basalt

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 0 300

89 91

0 100

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Conductivity,

in millimhosmeters

0 50 0 50

0 350

28R1–3

16-inch

64-inch

0

100

200

300

400

500

600

700

Delta t,

in microseconds

per foot

0 300

Total depth

684 feet

No data

Cored interval

Water level

in well

IP040406_FIG08_GOLD1
Figures 19

Figure 9. Geophysical logs, well-construction diagram, and generalized lithology for test well GOLD1-T (15N/01E-28R4S), Fort Irwin 

National Training Center, California. Geophysical logs were collected in a large diameter borehole; therefore, the measurements are 

subdued relative to GOLD1.

1c

Sandy gravel

Gravelly silty

sand

Gravelly sand

Dacite

Sand

Silty gravelly

sand

Gravelly sand

Basalt

Depth below land surface, in feet

0 20−150 50

90 92

0 100

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

28R4

16-inch

64-inch

0

100

200

300

400

500

600

700

0 300

Total depth

700 feet

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot

IP040406_FIG09_GOLD1-T
20 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 10. Geophysical logs, well-construction diagram, and generalized lithology for test well NELT6 (15N/02E-05N1S), Fort Irwin 

National Training Center, California.

IP040406_FIG10_NELT6

1c

2c

3c

Sandy gravel

Sandy gravel,

minor Silt

Silty sandy

gravel

Sandy gravel

Silty sandy

gravel

Clayey sandy

gravel

Sandy clay and

gravel

Sandy gravel,

minor clay

Clayey sandy

gravel

Gravelly Sand

Clayey sandy

gravel

Sand and gravel

Silty sand and

gravel

Depth below land surface, in feet

0 20 -200 200

80 84

0 100

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

5N1

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

903 feet

No data

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
Figures 21

Figure 11. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site NELT2 

(15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National Training Center, California.

IP040406_FIG11_NELT2

1c

2c

3c

Sandy gravel

Gravelly sand

Gravelly sand

Fractured dacite

Silty sandy

gravel (with

volcanic ash?)

Fractured dacite

Silty Sand;

tephra

(volcanic

ash)

Temperature

log is a 

composite

Depth below land surface, in feet

0 20 -200 200

88 92

0 100

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

6L1–3

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 1,000

Total depth

840 feet

No data

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
22 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 12. Geophysical logs, well-construction diagram, and generalized lithology for test well NELT4 (15N/03E-08L1S), Fort Irwin 

National Training Center, California.

IP040406_FIG12_NELT4

Sandy gravel

Silty gravelly

clayey sand

Sandy gravel

Sandy silty clay

Clayey sandy

gravel

Sandy silty clay

Volcanic ash

Sandy clayey silt

Clayey silty sand

Gravelly sand

Sandy gravel

Gravel;

semi-consolidated

Sandy Gravel;

semi-consolidated

Weathered

Bedrock; Gneiss

Bedrock; Gneiss

1c

2c

3c

Depth below land surface, in feet

0 20 0 70

75 90

0 100

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

8L1

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 1,500

Total depth

885 feet

No data

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
Figures 23

Figure 13. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site CCT1 

(15N/03E-25L1S, -25L2S, -25L3S), Fort Irwin National Training Center, California.

Sandy gravel

Silty sandy gravel

Sandy gravel

Silty sandy gravel

Gravelly sandy

silt

Sandy clayey silt

Silty clay with

tephra

Sandy silty clay

with tephra

Silty sand with

tephra

Silty clay with

tephra

Sandy clay with

tephra

Silty sand

Sandy clay

Sandy clayey silt

Clay

Clayey sandy silt

Clayey silt

Clayey sandy silt

Clayey silty sand

Silty sand

Gravelly sand

Silty clay

Gravelly sand

Clayey silt

Sandy silt

Silty sand

Silty gravelly

sand

Depth below land surface, in feet

0 20 250 700

95 102

0 150

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

25L1–3

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

903 feet

No data

IP040406_FIG13_CCT1

2c

1c

3c

4c

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
24 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 14. Geophysical logs, well-construction diagram, and generalized lithology for test well RDPS (15N/06E-33L1S), Fort Irwin 

National Training Center, California.

Gravelly sand

Silty clay

Gravelly sand

Sandy clay

Clayey sand

Sandy clay

Clayey sand

Sandy clay

Silty sand

Clay

Silty clay

Clayey sand

Silty clay

Clayey sand

Sandy clay

Silty clay

Clayey sand

Clay

Sandy clay

Clayey sand

Clay

Depth below land surface, in feet

0 20 250 700

95 102

0 150

Temperature,

in degrees

Fahrenheit

0 50 0 50 33L1

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

1,000 feet

No data

IP040406_FIG14_RDPS

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
Figures 25

Figure 15. Geophysical logs, well-construction diagram, and generalized lithology for test well NELT5 (16N/01E-35P1S), Fort Irwin 

National Training Center, California [Abbreviations: gran, granule].

1c

3c

2c

Gravelly sand

Gravel

(gran-boulder)

with minor sand

Gravel

(gran-boulder)

with minor sand

Gravel

(gran-boulder)

with trace sand

Gravel

(cobble-boulder)

Gravel

(gran-cobble)

with minor

sandy clay

Gravel

(gran-cobble)

 with minor

sandy clay; semiconsolidated

Gravelly

(gran-cobble)

sand with

minor clay; semiconsolidated 

Gravelly sand

with minor

sandy clay; semiconsolidated

Depth below land surface, in feet

0 20–100 400

80 84

0 100

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

35P1

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

905 feet

No data

IP040406_FIG15_NELT5

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
26 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 16. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site NELT7 

(16N/02E-16P1S, -16P2S, -16P3S), Fort Irwin National Training Center, California.

1c

2c

3c

Sandy gravel to

gravelly sand

Clayey gravelly

sand

Silty sand (possible

tephra interbeds)

Volcanic silty

sand

Silty sand

Sandy clay

Silty sand and

gravel, very poorly

sorted, cemented

Depth below land surface, in feet

0 20 –50 0

80 85

0 200

Temperature,

in degrees

Fahrenheit

Conductivity,

in millimhosmeters

0 50 0 50

0 350

16P1–3

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

865 feet

No data

IP040406_FIG16_NELT7

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
Figures 27

Figure 17. Geophysical logs, well-construction diagram, and generalized lithology for test well NELT3 (16N/02E-31H1S), Fort Irwin 

National Training Center, California.

1c

2c

3c

Sandy gravel

Silty sandy gravel

Clayey silty sand

Sandy gravel

Silty sandy gravel

Sandy gravel

Silty sandy gravel

Gravelly sand

Sandy gravel

Silty sandy gravel

Sandy gravel

Silty sand

Clayey gravelly

sand

Sandy gravel

Silty sand

Sandy gravel

Gravelly silty

sand

Sandy gravel

Gravelly silty

sand

Depth below land surface, in feet

0 20 300 700

99 102

0 150

Temperature,

in degrees

Fahrenheit

0 50 0 50 31H1

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

800 feet

IP040406_FIG17_NELT3

No data

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot

Conductivity,

in millimhosmeters

0 350
28 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 18. Geophysical logs, well-construction diagram, and generalized lithology for multiple-well monitoring site NELT1 

(16N/02E-34Q1S, -34Q2S), Fort Irwin National Training Center, California.

1c

2c

3c

Gravelly sand

Gravelly sandy

silty clay

Gravelly sandy

silty clay

Gravelly sandy

silty clay

Silty clay

Silty clay

Depth below land surface, in feet

0 20 0 300

94 96

0 150

Temperature,

in degrees

Fahrenheit

0 50 0 50 34Q1, 2

16-inch

64-inch

0

100

200

300

400

500

600

700

800

900

1,000

0 300

Total depth

803 feet

IP040406_FIG18_NELT1

No data

Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot

Conductivity,

in millimhosmeters

0 350
Figures 29

Figure 19. Geophysical logs, well-construction diagram, and generalized lithology for test well SBTW (31S/46E-05B1M), Fort Irwin 

National Training Center, California. Depth below land surface, in feet

0 20 0 100

85 90

0 150

Temperature,

in degrees

Fahrenheit

0 50 0 50 5B1

16-inch

64-inch

0

100

200

300

400

500

600

700

0 500

Total depth

600 feet

IP040406_FIG19_SBTW

No data

Sandy gravel

Silty gravelly

sand

Gravelly sand

Silty sand

Gravelly sand

Sandy gravel

Basalt

Clayey gravelly

sand

Gravelly sand

Clayey gravelly

sand

Gravelly sandy

clay

Clayey sand

Gravelly sandy

clay

Sandy clay

Gravelly sandy

clay

Conductivity,

in millimhosmeters

0 350 Cored interval

Water level

in well

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

Spontaneous

potential,

in millivolts

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

Delta t,

in microseconds

per foot
30 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 20. Well-construction diagram and generalized lithology for multiple-well monitoring site SBMW (31S/46E-05B2M, -05B3M) 

Fort Irwin National Training Center, California, and geophysical logs from SBTW (31S/46E-05B1M). Because of its proximity to SBTW, no 

geophysical logs were collected for SBMW.

Figure 21. Geophysical logs, well-construction diagram, and generalized lithology for single-well monitoring site SBMC

(31S/46E-05D1M), Fort Irwin National Training Center, California. Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 0 100

85 90

0 150

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

0 50 0 50 5B2, 3

16-inch

64-inch

0

100

200

300

Delta t,

in microseconds

per foot

0 500

Total depth

298 feet

IP040406_FIG20_SBMW

Conductivity,

in millimhosmeters

0 50

Gravelly sand

Slightly silty sand

Sandy gravel

Silty gravelly sand

Gravelly sand

Sandy gravel

Clayey silty sand

Sandy gravel

Silty gravelly sand

Basalt

Clayey silty gravelly sand

Sandy gravel

Silty sand

Clayey silty sand

Clayey gravelly silty sand

Clayey silty sand

Gravelly sand

Silty gravelly sand

Water level

in well

Gravelly sand

Gravelly silty

sand

Gravelly sand

Sandy gravel

Silty sand

Gravel

Silty sandy gravel

Sandy gravel

Gravelly silty sand

Weathered basalt

Depth below land surface, in feet

Caliper,

in inches

Generalized

lithology

Well

construction

Gamma,

in counts

per second

0 20 0 100

85 90

0 150

Spontaneous

potential,

in millivolts

Temperature,

in degrees

Fahrenheit

Resistivity,

in ohmmeters

Lateral

resistivity,

in ohmmeters

0 50 0 50 5D1

16-in

64-in

0

100

200

300

Delta t,

in microseconds

per foot

0 500

Total depth

280 feet

No data

Conductivity,

in millimhosmeters

0 350 Water level

in well
Figures 31

Figure 22. Nomenclature used for description of texture in lithologic logs. A, ternary diagram used for samples containing gravel; 

B, ternary diagram used for samples lacking gravel (adapted from Folk, 1954). [* samples in these fields may be prefaced by the term 

“sandy” if >10% sands occur in the sample; mm, millimeters]

GRAVEL

(>2 mm)

SAND

(0.0625-2 mm)

SILT + CLAY

(<0.0625 mm)

80

30

5

9:1 1:1

SILT+CLAY:SAND Ratio

1:9

Gravel, in percent

Gravel

*Clayey ±silty

gravel

or 

Silty ±clayey

gravel

*Gravelly ±clayey

silt or Gravelly

±silty clay

Gravelly ±clayey 

silty sand or 

Gravelly ±silty 

clayey sand

Clayey ±silty 

sandy gravel 

or 

Silty ±clayey 

sandy gravel

Sandy

gravel

Gravelly

sand Slightly gravelly

sand

Slightly gravelly

silty clay or

Slightly gravelly

clayey silt

Slightly gravelly

sandy ±clayey silt

or

Slightly gravelly

sandy ±silty clay

Slightly gravelly

clayey silty sand

or

Slightly gravelly

silty clayey sand

Sandy ±clayey silt

or

Sandy ±silty clay

Silty ±clayey sand

or

Clayey ±silty sand

Trace 

(0.01 percent)

SAND

(0.0625-2 mm)

SILT

(0.00390625-0.0625mm)

CLAY

(<0.00390625mm) 2:1

CLAY:SILT Ratio

1:2

Sand, in percent

Clay

Sandy

clay

Clayey

sand

Clayey 

silty sand

or Silty 

clayey sand

Silty 

sand

Sandy clayey silt 

or 

Sandy silty clay

Sandy

silt

Clayey silt or 

Silty clay

Sand

Silt

90

50

10

B

A

(G)

(mG) (msG)

(S)

(cS) (zS)

(mS)

(sM) (sC) (sZ)

(C) (Z) (M)

(sG)

(gS) (gM) (gmS)

Trace 

(0.01 percent)

((g)S)

((g)M)

(sM) (mS)

((g)sM) ((g)mS)

IP040406_FIG22_Nomenclature
32 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Figure 23. Relation between the sum of major constituents and dissolved solids and specific conductance from monitoring and test 

wells at the Fort Irwin National Training Center, San Bernardino County, California., 2009–12.

17,000

17,500

18,000

17,000 17,500

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

0 500 1,000 1,500 2,000 2,500 3,000 3,500

Dissloved solids, in milligrams per liter/

Specific conductance, in microsiemens per centimeter at 25° C 

Sum of major constituents, in milligrams per liter

Dissolved solids residue on evaporation at 180°C filtered, in milligrams per liter

Specific conductance unfiltered, in microsiemens per centimeter at 25°C

Linear dissolved solids residue Linear specific conductance

NELT2-#2

(15N/3E-06L2)

IP040406_Fig23

EXPLANATION
Tables 33

Tables
34 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 1.

Well construction data for monitoring and test wells, Fort Irwin National Training Center, California.—Continued

[Altitudes were interpolated from a topographic map. All wells were constructed with schedule-80 polyvinyl chloride (PVC) casing and slotted screens, except RDPS, which was constructed with steel casing with steel slotted screens. Abbreviations: fbls, feet below land surface; G, Grout; GC, Grout and Bentonite Chips; GP, Grout and Bentonite Pellets; GPC, Grout and Portland Cement; ID, identification; 

mm-dd-yyyy, month-day-year; MWMS, multiple-well monitoring site; NAVD 88, North American Vertical Datum of 1988; P, Bentonite Pellets; SWMS, single-well monitoring site; SWTS, single-well test site; #, number; USGS, U.S. Geological Survey; —, not applicable, bottom of hole was grouted in and well was continuously sanded across screened intervals]

Common 

name

State 

well number

USGS 

site ID

Type and 

purpose of 

well

Depth of 

well 

(fbls)

Sand-pack 

interval 

(fbls)

Seal 

interval 

(fbls)

Type of 

seal

Perforated 

interval 

(fbls)

Inner 

diameter 

of well 

(inches)

Altitude of 

land-surface 

datum 

(NAVD 88)

Date 

drilled

(mm-dd-yyyy)

Site LL04

LL04 #1 12N/03E-01M1S 350929116372301 MWMS 970 925–1,019 515–925

G 950–970 1.94 2,410 02-03-2011 1LL04 #2 12N/03E-01M2S 350929116372302 MWMS 490 445–515 371–445

G 470–490 1.94 2,410 02-03-2011 1LL04 #3 12N/03E-01M3S 350929116372303 MWMS 350 305–371 0–305 GC 330–350 1.94 2,410 02-03-2011

Site LL04B

LL04B #1 12N/03E-01M4S 350929116372201 MWMS 490 446–520 366–446

G 470–490 1.94 2,410 03-01-2011

LL04B #2 12N/03E-01M5S 350929116372202 MWMS 350 307–366 0–307

G 330–350 1.94 2,410 03-01-2011

Site CRTH2

CRTH2 #1 13N/05E-08B1S 351416116281501 MWMS 940 883–965 306–883 GP 920–940 1.94 1,432 08-11-2011

CRTH2 #2 13N/05E-08B2S 351416116281502 MWMS 290 249–306 0–249

G 270–290 1.94 1,432 08-11-2011

Site CRTH1

CRTH1 #1 13N/05E-28Q1S 351100116271001 MWMS 1,260 1,182–1,301 736–1,182

G 1,240–1,260 1.94 1,577 06-10-2011

CRTH1 #2 13N/05E-28Q2S 351100116271002 MWMS 720 679–736 268–679

G 700–720 1.94 1,577 06-10-2011

CRTH1 #3 13N/05E-28Q3S 351100116271003 MWMS 255 219–268 205–219

P 235–255 1.94 1,577 06-10-2011 151–205 0–151 GP 175–195

Site GOLD2

GOLD2 #1 14N/01E-07R1S 351904116543101 MWMS 440 400–451 362–400 GP 420–440 1.94 3,107 03-09-2012

GOLD2 #2 14N/01E-07R2S 351904116543102 MWMS 350 308–362 258–308 GP 330–350 1.94 3,107 03-09-2012

GOLD2 #3 14N/01E-07R3S 351904116543103 MWMS 240 196–258 0–196 GP 220–240 1.94 3,107 03-09-2012

Site BLA5

BLA5 #1 14N/03E-26K1S 351638116374301 MWMS 360 299–349 349–370

P 320–340 1.94 2,345 03-19-2011 280–299

P 2BLA5 #2 14N/03E-26K2S 351638116374302 MWMS 210 240–280 220–240

P 190–210 1.94 2,345 03-19-2011

BLA5 #3 14N/03E-26K3S 351638116374303 MWMS 210 171–220 0–171 GP 190–210 1.94 2,345 03-19-2011

Site BLA5B

BLA5B #1 14N/03E-26K4S 351638116374304 SWMS 270 238–280 0–238 GP 250–270 1.94 2,345 03-22-2011

Site GOLD1

GOLD1 #1 15N/01E-28R1S 352144116522601 MWMS 670 631–684 595–631 GP 650–670 1.94 3,058 06-30-2011

GOLD1 #2 15N/01E-28R2S 352144116522602 MWMS 580 534–595 392–534 GP 560–580 1.94 3,058 06-30-2011

GOLD1 #3 15N/01E-28R3S 352144116522603 MWMS 370 328–392 0–328 GP 350–370 1.94 3,058 06-30-2011

Table 1.

Well construction data for monitoring and test wells, Fort Irwin National Training Center, California.
Tables 35

Table 1. Well construction data for monitoring and test wells, Fort Irwin National Training Center, California.—Continued[Altitudes were interpolated from a topographic map. All wells were constructed with schedule-80 polyvinyl chloride (PVC) casing and slotted screens, except RDPS, which was constructed with steel casing with steel slotted screens. Abbreviations: fbls, feet below land surface; G, Grout; GC, Grout and Bentonite Chips; GP, Grout and Bentonite Pellets; GPC, Grout and Portland Cement; ID, identification; 

mm-dd-yyyy, month-day-year; MWMS, multiple-well monitoring site; NAVD 88, North American Vertical Datum of 1988; P, Bentonite Pellets; SWMS, single-well monitoring site; SWTS, single-well test site; #, number; USGS, U.S. Geological Survey; —, not applicable, bottom of hole was grouted in and well was continuously sanded across screened intervals]

Common 

name

State 

well number

USGS 

site ID

Type and 

purpose of 

well

Depth of 

well 

(fbls)

Sand-pack 

interval 

(fbls)

Seal 

interval 

(fbls)

Type of 

seal

Perforated 

interval 

(fbls)

Inner 

diameter 

of well 

(inches)

Altitude of 

land-surface 

datum 

(NAVD 88)

Date 

drilled

(mm-dd-yyyy)

Site GOLD1-T

GOLD1-T #1 15N/01E-28R4S 352145116522401 SWTS 680 208–700 0–208 GP

620–680

7.63 3,064 03-5-2012 300–420

260–280

Site NELT6

NELT6 #1 15N/02E-05N1S 352436116474001 SWTS 840 355–903 0–355 GP

760–840

7.63 3,139 02-23-2012 500–560

400–460

Site NELT2

NELT2 #1 15N/03E-06L1S 352450116421101 MWMS 800 738–840 545–738 G 760–800 1.94 3,054 09-06-2011

NELT2 #2 15N/03E-06L2S 352450116421102 MWMS 530 490–545 313–490 G 510–530 1.94 3,054 09-06-2011

NELT2 #3 15N/03E-06L3S 352450116421103 MWMS 300 245–313 0–245 GP 280–300 1.94 3,054 09-06-2011

Site NELT4

NELT4 #1 15N/03E-08L1S 352354116411201 SWTS 580 280–618

618–885 G 560–580

7.63 2,990 12-14-2011 — — 500–520

0–280 GP 320–480

Site CCT1

CCT1 #1 15N/03E-25L1S 352149116370701 MWMS 895 850–903 769–850 G 875–895 1.94 2,688 08-08-2011

CCT1 #2 15N/03E-25L2S 352149116370702 MWMS 750 716–769 686–716 P 730–750 1.94 2,688 08-08-2011

CCT1 #3 15N/03E-25L3S 352149116370703 MWMS 665 625–686 0–625 GP 645–665 1.94 2,688 08-08-2011

Site RDPS

RDPS #1 15N/06E-33L1S 352058116205901 SWTS 740 388–739 739–1000 G 520–700 6.00 2,102 04-23-2009 0–388 GPC 420–440

Site NELT5

NELT5 #1 16N/01E-35P1S 352530116503601 SWTS 840 437–905 0–437 GP

820–840

7.63 3,243 02-20-2012 640–780

480–520

Site NELT7

NELT7 #1 16N/02E-16P1S 352806116462101 MWMS 800 750–865 661–750 G 780–800 1.94 3,172 12-14-2011

NELT7 #2 16N/02E-16P2S 352806116462102 MWMS 640 592–661 421–592 GP 620–640 1.94 3,172 12-14-2011

NELT7 #3 16N/02E-16P3S 352806116462103 MWMS 400 348–421 0–348 GP 380–400 1.94 3,172 12-14-2011
36 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 1.

Well construction data for monitoring and test wells, Fort Irwin National Training Center, California.—Continued

[Altitudes were interpolated from a topographic map. All wells were constructed with schedule-80 polyvinyl chloride (PVC) casing and slotted screens, except RDPS, which was constructed with steel casing with steel slotted screens. Abbreviations: fbls, feet below land surface; G, Grout; GC, Grout and Bentonite Chips; GP, Grout and Bentonite Pellets; GPC, Grout and Portland Cement; ID, identification; 

mm-dd-yyyy, month-day-year; MWMS, multiple-well monitoring site; NAVD 88, North American Vertical Datum of 1988; P, Bentonite Pellets; SWMS, single-well monitoring site; SWTS, single-well test site; #, number; USGS, U.S. Geological Survey; —, not applicable, bottom of hole was grouted in and well was continuously sanded across screened intervals]

Common 

name

State 

well number

USGS 

site ID

Type and 

purpose of 

well

Depth of 

well 

(fbls)

Sand-pack 

interval 

(fbls)

Seal 

interval 

(fbls)

Type of 

seal

Perforated 

interval 

(fbls)

Inner 

diameter 

of well 

(inches)

Altitude of 

land-surface 

datum 

(NAVD 88)

Date 

drilled

(mm-dd-yyyy)

Site NELT3

NELT3 #1 16N/02E-31H1S 352556116475501 SWTS 740 204–800 0–204 GP

720–740

7.63 3,097 07-25-2011 540–580 360–460

260–300

Site NELT1

NELT1 #1 16N/02E-34Q1S 352535116451001 MWMS 760 715–803 321–715

G 740–760 1.94 3,074 07-10-2011

NELT1 #2 16N/02E-34Q2S 352535116451002 MWMS 300 258–321 0–258 GP 280–300 1.94 3,074 07-10-2011

Site SBTW

SBTW #1 31S/46E-05B1M 351619117041301 SWTS 400 118–600 0–118

G 220–380 7.63 3,041 12-07-2009 140–200

Site SBMW

SBMW #1 31S/46E-05B2M 351620117041101 MWMS 290 259–298 160–259

G 270–290 1.94 3,044 02-23-2010

SBMW #2 31S/46E-05B3M 351620117041102 MWMS 150 105–160 0–105

G 130–150 1.94 3,044 02-23-2010

Site SBMC

SBMC #1 31S/46E-05D1M 351619117045701 SWMS 200 160–218 218–280

G 180–200 1.94 3,041 11-17-2009 0–160

G

1Wells failed due to a grout manufacturing defect, sealed and abandoned, replaced by site LL04B. 2Well placed at wrong depth, sealed and abandoned, replaced by site BLA5B.
Tables 37

Depth 

(feet) Description

10 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

subangular to subrounded; yellowish brown (10YR 5/4); 

abundant quartz.

20 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4); 

slightly calcareous; abundant quartz.

30 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; yellowish brown (10YR 5/4); abundant 

quartz.

40 Sandy gravel (sG); granules to small pebbles with coarse to 

very coarse sand; well to moderately sorted; subangular 

to subrounded; yellowish brown (10YR 5/6).

50 Sandy gravel (sG); granules to small pebbles with very 

coarse sand; well to moderately sorted; angular to 

subangular; yellowish brown (10YR 5/4).

60 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; yellowish brown (10YR 5/4).

70 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; yellowish brown (10YR 5/4).

80 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4); 

slightly calcareous.

90 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

subangular to subrounded; yellowish brown (10YR 5/4); 

slightly calcareous.

100 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; yellowish brown (10YR 5/4).

105

 1C shoe

Silty sand (zS); medium to very coarse sand with silt 

and trace granules to small pebbles; poorly sorted; 

subangular to subrounded; pale brown (10YR 6/3); 

calcareous.

110 Sandy gravel (sG); granules to small pebbles with coarse to 

very coarse sand and trace medium pebbles; moderately 

sorted; angular to subangular; brown (10YR 5/3); 

abundant quartz.

120 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; subangular to 

subrounded; yellowish brown (10YR 5/4).

Table 2A. Lithologic SHAKER log for multiple-well monitoring site LL04 (12N/03E-01M1S, -01M2S, -01M3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 2,410 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 3, 2011. Total depth drilled: 

1,019 feet. Screened intervals, 950–970, 470–490, and 330–350 feet. Ream—sample was collected while enlarging the hole after coring or following a change in 

the drill bit size or type]

Depth 

(feet) Description

130 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; angular to 

subangular; brown (10YR 5/3); abundant quartz.

140 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subangular; yellowish brown (10YR 5/4).

150 Sandy gravel (sG); granules to small pebbles with coarse to 

very coarse sand and trace medium pebbles; moderately 

sorted; angular to subangular; brown (10YR 5/3).

160 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subrounded; brown (10YR 5/3).

170 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately sorted; subangular 

to subrounded; brown (10YR 5/3).

180 Gravelly sand (gS); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subangular; brown (10YR 5/3); slightly calcareous.

190 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subangular; brown (10YR 5/3).

200 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subangular; brown (10YR 5/3).

210 Gravelly sand (gS); very coarse sand with granules to 

small pebbles; well to moderately sorted; subangular to 

subrounded; brown (10YR 5/3).

220 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles and trace silt; moderately to 

poorly sorted; angular to subangular; brown (10YR 5/3).

230 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subangular; grayish brown (10YR 5/2); slightly 

calcareous.

240 Gravelly silty sand (gmS); coarse to very coarse sand with 

silt and granules to small pebbles; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4); slightly 

calcareous.

250 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately sorted; angular to 

subangular; brown (10YR 5/3).

260 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subrounded; 

brown (10YR 5/3).
38 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

270 Gravelly silty sand (gmS); coarse to very coarse sand with 

silt and granules; poorly sorted; angular to subangular; 

brown (10YR 5/3); slightly calcareous.

280 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subrounded; brown (10YR 5/3); slightly calcareous.

290 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately sorted; angular to 

subangular; brown (10YR 5/3).

300 Gravelly silty sand (gmS); coarse to very coarse sand with 

silt and granules to small pebbles; poorly sorted; angular 

to subangular; brown (10YR 5/3); slightly calcareous.

310 Gravelly silty sand (gmS); coarse to very coarse sand with 

silt and granules to small pebbles; poorly sorted; angular 

to subrounded; grayish brown (10YR 5/2); calcareous.

320 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; brown (10YR 5/3); slightly calcareous.

330 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; subangular 

to subrounded; brown (10YR 5/3).

340 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subrounded; grayish brown (10YR 5/2).

350 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; brown (10YR 5/3).

360 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subangular; 

light brownish gray (10YR 6/2); slightly calcareous.

370 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; subangular to subrounded; 

light brownish gray (10YR 6/2); slightly calcareous.

380 Silty sand (zS); medium to very coarse sand with silt; 

moderately to poorly sorted; subangular to subrounded; 

brown (10YR 5/3).

385

 2C shoe

Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; very poorly 

sorted; angular to subangular; brown (10YR 4/3); 

slightly micaceous.

390 Clayey silty sand (mS); fine to coarse sand with silt and 

clay; poorly sorted; angular to subangular; brown 

(10YR 5/3).

Depth 

(feet) Description

400 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; pale brown 

(10YR 6/3); calcareous.

410 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; moderately to poorly sorted; 

subangular to subrounded; brown (10YR 5/3); slightly 

calcareous.

420 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; pale brown 

(10YR 6/3).

430 Gravelly silty clayey sand (gmS); coarse to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2); slightly calcareous.

440 Sandy clayey silt (sM); silt with clay and medium to 

very coarse sand; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

450 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; brown (10YR 5/3); 

calcareous.

460 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; 

brown (10YR 5/3); slightly calcareous.

470 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and trace granules; very poorly 

sorted; angular to subangular; light brownish gray 

(10YR 6/2); trace white clay; calcareous.

480 Silty sandy clayey gravel (msG); granules to medium 

pebbles with clay, silt and medium to very coarse 

sand; very poorly sorted; angular to subangular; light 

brownish gray (10YR 6/2); trace white clay; slightly 

calcareous.

490 Silty clayey sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; subangular to 

subrounded; grayish brown (10YR 5/2).

500 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; brown (10YR 5/3); 

slightly calcareous.

510 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3); slightly calcareous.

Table 2A. Lithologic SHAKER log for multiple-well monitoring site LL04 (12N/03E-01M1S, -01M2S, -01M3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,410 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 3, 2011. Total depth drilled: 

1,019 feet. Screened intervals, 950–970, 470–490, and 330–350 feet. Ream—sample was collected while enlarging the hole after coring or following a change in 

the drill bit size or type]
Tables 39

Depth 

(feet) Description

520 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; moderately to poorly sorted; subangular to 

subrounded; grayish brown (10YR 5/2).

530 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

grayish brown (10YR 5/2).

540 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; light 

brownish gray (10YR 6/2).

550 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; very poorly sorted; angular 

to subangular; light brownish gray (10YR 6/2); slightly 

calcareous.

560 Sandy gravelly clayey silt (gM); silt with clay, granules 

to small pebbles, and medium to very coarse sand; 

very poorly sorted; light brownish gray (10YR 6/2); 

calcareous.

570 Sandy gravelly clayey silt (gM); silt with clay, granules, 

and medium to very coarse sand; very poorly sorted; 

pale brown (10YR 6/3); calcareous.

580

 3C shoe

Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules to small pebbles; very 

poorly sorted; angular to subangular.

585 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt and trace granules; very poorly sorted; angular 

to subangular; grayish brown (10YR 5/2); slightly 

calcareous.

590 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; very poorly sorted; angular 

to subangular; grayish brown (10YR 5/2).

600 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

gray (2.5Y 5/1).

610 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; light 

brownish gray (2.5Y 6/2).

620 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

light brownish gray (2.5Y 6/2).

630 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

light brownish gray (2.5Y 6/2).

640 Silty clayey gravelly sand (gmS); medium to very coarse 

sand with silt, clay, and granules; very poorly sorted; 

angular to subangular; light brownish gray (2.5Y 6/2).

Depth 

(feet) Description

650 Gravelly clayey silty sand (gmS); medium to very 

coarse sand with silt, clay, and trace granules; very 

poorly sorted; subangular to subrounded; pale brown 

(10YR 6/3).

660 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; very poorly sorted; angular 

to subangular; light brownish gray (10YR 6/2); slightly 

calcareous.

670 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; angular to 

subangular; grayish brown (2.5Y 5/2); trace white clay; 

calcareous.

680 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; angular to 

subangular; light brownish gray (2.5Y 6/2); calcareous.

690 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; angular to 

subrounded; light brownish gray (2.5Y 6/2).

700 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; angular to 

subangular; grayish brown (10YR 5/2).

710 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; angular to 

subangular; light yellowish brown (2.5Y 6/3); slightly 

calcareous.

720 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; light 

brownish gray (2.5Y 6/2); calcareous.

730 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

light olive brown (2.5Y 5/3); slightly calcareous.

740 Clayey sand (cS); medium to very coarse sand with clay; 

poorly sorted; angular to subangular; brown (10YR 5/3); 

calcareous.

750 Clayey silty sand (mS); coarse to very coarse sand with silt 

and clay; poorly sorted; subangular to subrounded; light 

olive brown (2.5Y 5/3); calcareous.

760 Silty clayey sand (mS); medium to very coarse sand 

with clay, silt, and trace granules; very poorly sorted; 

angular to subangular; light brownish gray (2.5Y 6/2); 

calcareous.

770 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; light 

olive brown (2.5Y 5/3); slightly calcareous.

Table 2A. Lithologic SHAKER log for multiple-well monitoring site LL04 (12N/03E-01M1S, -01M2S, -01M3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,410 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 3, 2011. Total depth drilled: 

1,019 feet. Screened intervals, 950–970, 470–490, and 330–350 feet. Ream—sample was collected while enlarging the hole after coring or following a change in 

the drill bit size or type]
40 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

780 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

light brownish gray (2.5Y 6/2).

790 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

olive gray (5Y 5/2).

800 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

olive gray (5Y 5/2).

810 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; very poorly sorted; angular 

to subangular; olive gray (5Y 5/2).

820 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; olive 

gray (5Y 5/2); slightly calcareous.

830 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; very poorly sorted; angular 

to subangular; light brownish gray (2.5Y 6/2); slightly 

calcareous.

840 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; light 

brownish gray (2.5Y 6/2).

850 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; olive 

gray (5Y 4/2); slightly calcareous.

860 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; 

grayish brown (2.5Y 5/2).

870 Clayey silty sand (mS); medium to very coarse sand with 

silt, clay, and trace granules; very poorly sorted; angular 

to subangular; olive gray (5Y 5/2).

880 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; olive gray 

(5Y 5/2); slightly calcareous.

890 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; subangular to subrounded; 

olive gray (5Y 5/2); slightly calcareous.

900 Sand (S); medium to very coarse sand; very well to well 

sorted; angular to subangular; brown (10YR 5/3).

910 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; olive gray 

(5Y 5/2); slightly calcareous.

Table 2A. Lithologic SHAKER log for multiple-well monitoring site LL04 (12N/03E-01M1S, -01M2S, -01M3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,410 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 3, 2011. Total depth drilled: 

1,019 feet. Screened intervals, 950–970, 470–490, and 330–350 feet. Ream—sample was collected while enlarging the hole after coring or following a change in 

the drill bit size or type]

Depth 

(feet) Description

920 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; olive 

gray (5Y 5/2); slightly calcareous.

930 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; olive 

gray (5Y 4/2); slightly calcareous.

940 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; olive 

gray (5Y 5/2); calcareous.

950 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

olive gray (5Y 5/2); slightly calcareous.

960 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; very poorly sorted; angular 

to subangular; olive gray (5Y 5/2); slightly calcareous.

970 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subrounded; olive 

gray (5Y 5/2); calcareous.

980 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; angular to subangular; olive gray 

(5Y 4/2).

990 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

olive gray (5Y 5/2); calcareous.

999 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; subangular to subrounded; 

olive gray (5Y 5/2); slightly calcareous.

999

 4C top

Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to medium pebbles; 

very poorly sorted; subangular to subrounded; olive gray 

(5Y 5/2); extremely calcareous.

1,000

 Ream

Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules; very poorly sorted; 

angular to subangular; olive gray (5Y 5/2).

1,004

 4C shoe

Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; very poorly 

sorted; angular to subrounded; olive gray (5Y 5/2).

1,010 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subrounded; grayish brown (2.5Y 5/2).

1,019 Sandy silty clay (sM); clay with silt and coarse to very 

coarse sand; poorly sorted; olive gray (5Y 5/2); 

calcareous.
Tables 41

Depth 

(feet) Description

From To

0 20 Sand (S); medium to very coarse sand with trace 

fine sand; well sorted; angular to subangular; 

yellowish brown (10YR 5/4); slightly calcareous.

20 40 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles and trace 

large pebbles; moderately sorted; subangular to 

subrounded; yellowish brown (10YR 5/4); slightly 

calcareous; slightly micaceous.

40 60 Sand (S); medium to very coarse sand; well 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

60 80 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles; moderately 

sorted; subangular to subrounded; brown 

(10YR 5/3).

80 100 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; subangular to 

subrounded; yellowish brown (10YR 5/4); slightly 

calcareous.

100 120 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; subangular 

to subrounded; brown (10YR 5/3); slightly 

micaceous.

120 140 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately 

sorted; angular to subrounded; yellowish brown 

(10YR 5/4); slightly micaceous.

140 160 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4); calcareous; micaceous.

160 180 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 5/3); micaceous.

180 200 Silty sand (zS); fine to coarse sand with silt and 

trace very coarse sand; moderately to poorly 

sorted; subangular to subrounded; grayish brown 

(10YR 5/2); micaceous.

200 220 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; subangular 

to subrounded; dark grayish brown (10YR 4/2); 

micaceous.

220 240 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2); 

micaceous.

240 260 Silty sand (zS); fine to coarse sand with trace very 

coarse sand and silt; moderately to poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

Depth 

(feet) Description

From To

260 280 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2).

280 300 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

300 320 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular 

to subrounded; dark grayish brown (10YR 4/2); 

micaceous.

320 340 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subrounded; dark grayish brown (10YR 4/2).

340 360 Silty sand (zS); fine to coarse sand with silt and 

trace very coarse sand; moderately to poorly 

sorted; angular to subrounded; brown (10YR 5/3); 

slightly micaceous.

360 380 Silty sand (zS); very fine to medium sand with silt 

and trace granules; moderately to poorly sorted; 

angular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

380 400 Silty gravelly sand (gmS); fine to coarse sand with 

granules to small pebbles, silt, and trace medium 

pebbles; poorly sorted; angular to subrounded; 

brown (10YR 4/3); micaceous.

400 420 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3); micaceous.

420 440 Silty sand (zS); very fine to medium sand with silt 

and trace coarse to very coarse sand; moderately 

sorted; subangular to subrounded; brown 

(10YR 5/3); micaceous.

440 460 Silty sand (zS); very fine to medium sand with silt; 

moderately sorted; subangular to subrounded; 

grayish brown (10YR 5/2); micaceous.

460 480 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2); 

micaceous.

480 500 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

500 520 Silty sand (zS); fine to coarse sand with silt and 

trace very coarse sand; moderately to poorly 

sorted; subangular to subrounded; grayish brown 

(10YR 5/2); micaceous.

520 540 Silty sand (zS); very fine to medium sand with silt; 

moderately sorted; subangular to subrounded; 

dark grayish brown (10YR 4/2); micaceous.

Table 2B. Lithologic SIEVE log for multiple-well monitoring site LL04 (12N/03E-01M1S, -01M2S, -01M3S) Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 2,410 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 3, 2011. Total depth drilled, 

1,019 feet. Screened intervals, 950–970, 470–490, and 330–350 feet.]
42 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

From To

540 560 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

560 580 Silty sand (zS); fine to coarse sand with silt and 

trace very coarse sand; moderately to poorly 

sorted; subangular to subrounded; grayish brown 

(10YR 5/2); micaceous.

580 599 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2); 

micaceous.

599 619 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

619 639 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2); 

micaceous.

639 659 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2); 

micaceous.

659 679 Silty sand (zS); very fine to medium sand with 

silt and trace coarse sand; moderately sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

679 699 Silty sand (zS); very fine to medium sand with 

silt and trace coarse sand; moderately sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); slightly calcareous; micaceous.

699 719 Silty sand (zS); fine to coarse sand with silt, trace 

granules, and trace very coarse sand; moderately 

to poorly sorted; subangular to subrounded; dark 

grayish brown (10YR 4/2); micaceous.

719 739 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); slightly micaceous

739 759 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; grayish brown (10YR 5/2); slightly 

micaceous.

759 779 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; grayish brown (10YR 5/2); slightly 

calcareous; slightly micaceous.

Depth 

(feet) Description

From To

779 799 Silty sand (zS); fine to coarse sand with silt, trace 

granules, and trace very coarse sand; moderately 

to poorly sorted; subangular to subrounded; dark 

grayish brown (10YR 4/2); micaceous.

799 819 Silty gravelly sand (gmS); medium to very coarse 

sand with granules and silt; poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); micaceous.

819 839 Silty sand (zS); fine to coarse sand with silt and trace 

granules to medium pebbles; moderately to poorly 

sorted; subangular to subrounded; dark grayish 

brown (10YR 4/2); slightly micaceous.

839 859 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; very dark grayish brown (10YR 3/2); 

micaceous.

859 879 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; very dark grayish 

brown (10YR 3/2); micaceous.

879 899 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2); slightly micaceous.

899 919 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; very dark grayish brown (10YR 3/2); 

micaceous.

919 939 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; very dark grayish brown (10YR 3/2); 

micaceous.

939 959 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; very dark grayish brown (10YR 3/2); 

micaceous.

959 979 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; dark gray (10YR 4/1); 

slightly calcareous; micaceous.

979 999 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; very dark grayish 

brown (10YR 3/2); micaceous.

999 1,019 Silty sand (zS); fine to coarse sand with silt and trace 

medium pebbles; moderately to poorly sorted; 

subangular to subrounded; dark gray (10YR 4/1); 

slightly calcareous; micaceous.

Table 2B. Lithologic SIEVE log for multiple-well monitoring site LL04 (12N/03E-01M1S, -01M2S, -01M3S) Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,410 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 3, 2011. Total depth drilled, 

1,019 feet. Screened intervals, 950–970, 470–490 ,and 330–350 feet.]
Tables 43

Depth 

(feet) Description

10 Silty gravelly sand (gmS); medium to very coarse sand 

with granules and silt; moderately to poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4); 

calcareous.

20 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand and trace large pebbles; well 

to moderately sorted; angular to subangular; yellowish 

brown (10YR 5/4); slightly calcareous.

30 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4).

40 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; brown (10YR 5/3).

50 Clayey gravelly sand (gmS); medium to very coarse sand 

with granules to medium pebbles and clay; moderately 

to poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4); slightly calcareous.

60 Clayey gravelly sand (gmS); medium to very coarse sand 

with granules to medium pebbles and clay; moderately 

to poorly sorted; angular to subangular; light yellowish 

brown (10YR 6/4); calcareous.

70 Silty gravelly sand (gmS); medium to very coarse sand 

with granules to small pebbles and silt; moderately to 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4).

80 Clayey gravelly sand (gmS); medium to very coarse sand 

with granules to small pebbles and clay; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4); calcareous.

90 Silty clayey gravelly sand (gmS); medium to very coarse 

sand and granules to small pebbles with clay and silt; 

very poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

100 Clayey sand (cS); medium to very coarse sand with 

clay and trace granules; moderately to poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

105

1C shoe

Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to medium pebbles, and trace fine 

sand; poorly sorted; angular to subangular; dark 

yellowish brown (10YR 4/4).

110 Sandy clayey gravel (mG); granules to medium pebbles 

with clay and medium to very coarse sand; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

120 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; very 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4); slightly micaceous.

130 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with silt, clay, and granules to medium pebbles; 

very poorly sorted; angular to subangular; light olive 

brown (2.5Y 5/3); calcareous; micaceous.

Depth 

(feet) Description

140 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; very 

poorly sorted; subangular to subrounded; light olive 

brown (2.5Y 5/4); calcareous.

150 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand, and trace granules; poorly to very 

poorly sorted; yellowish brown (10YR 5/4); slightly 

calcareous.

160 Gravelly sandy silty clay (gM); clay with silt, medium 

to very coarse sand, and granules to small pebbles; 

poorly to very poorly sorted; pale brown (10YR 6/3); 

calcareous; white clay.

170 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules to small pebbles; poorly sorted; 

brown (10YR 5/3); calcareous.

180 Sandy silty clay (sM); clay with silt and trace coarse 

to very coarse sand; moderately to poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

190 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

200 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

210 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

220 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

225

2C shoe

Clay (C); clay with trace medium to coarse sand; 

well sorted; yellowish brown (10YR 5/4); slightly 

calcareous.

230 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

240 Sandy clay (sC); clay with fine to coarse sand and trace 

granules; poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

250 Sandy gravelly clay (gM); clay with granules to small 

pebbles and medium to very coarse sand; poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

260 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

270 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

280 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

290 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

Table 3A. Lithologic SHAKER log for multiple-well monitoring site CRTH2 (13N/05E-08B1S, -08B2S) Fort Irwin National Training Center, 

California.

[Altitude of land surface, approximately 1,432 feet. Drilled by U.S Geological Survey using mud-rotary drilling method, August 11, 2011. Total depth drilled, 

965 feet. Screened intervals, 920–940 and 270–290 feet.]
44 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

300 Sandy gravelly clay (gM); clay with granules and medium 

to very coarse sand; moderately to poorly sorted; 

yellowish brown (10YR 5/4); slightly calcareous.

310 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

320 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

330 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

340 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

350 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); calcareous; trace white clay.

360 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

370 Sandy clay (sC); clay with fine to coarse sand and trace 

granules; poorly sorted; yellowish brown (10YR 5/4); 

slightly calcareous.

380 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

390 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4); slightly 

calcareous.

400 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

410 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately sorted; dark yellowish brown 

(10YR 4/4); calcareous.

420 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately sorted; brown (10YR 5/3); 

calcareous.

430 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

440 Sandy clay (sC); clay with very fine to medium sand; 

moderately sorted; brown (10YR 5/3); calcareous.

450 Sandy clay (sC); clay with very fine to medium sand; 

moderately sorted; brown (10YR 5/3); calcareous; trace 

white clay.

460 Gravelly sandy clay (gM); clay with fine to coarse sand 

and granules to small pebbles; poorly sorted; brown 

(10YR 5/3); calcareous.

470 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; brown (10YR 5/3); calcareous.

Depth 

(feet) Description

480 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; yellowish brown (10YR 5/4); slightly 

calcareous.

490 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; brown (10YR 5/3); calcareous.

500 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; yellowish brown (10YR 5/4); calcareous.

510 Gravelly sandy clay (gM); clay with fine to coarse sand 

and granules; poorly sorted; brown (10YR 5/3); 

calcareous.

520 Sandy clay (sC); clay with fine to coarse sand and 

trace granules; poorly sorted; dark yellowish brown 

(10YR 4/4); calcareous.

530 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; brown (10YR 5/3); calcareous.

540 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules to small pebbles; poorly sorted; 

brown (10YR 5/3); calcareous.

550 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules; poorly sorted; brown 

(10YR 5/3); calcareous.

560 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; brown (10YR 5/3); 

calcareous.

570 Sandy gravelly clay (gM); clay with granules and medium 

to very coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

580 Sandy gravelly clay (gM); clay with granules to small 

pebbles and medium to very coarse sand; poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

590 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

600 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules; poorly sorted; yellowish 

brown (10YR 5/4); calcareous.

610 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules; poorly sorted; yellowish 

brown (10YR 5/4); calcareous.

620 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

630 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish 

brown (10YR 5/4); slightly calcareous.

640 Sandy gravelly clay (gM); clay with granules and medium 

to very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

Table 3A. Lithologic SHAKER log for multiple-well monitoring site CRTH2 (13N/05E-08B1S, -08B2S) Fort Irwin National Training Center, 

California.—Continued

[Altitude of land surface, approximately 1,432 feet. Drilled by U.S Geological Survey using mud-rotary drilling method, August 11, 2011. Total depth drilled, 

965 feet. Screened intervals, 920–940 and 270–290 feet.]
Tables 45

Depth 

(feet) Description

650 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; moderately to poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

660 Sandy clay (sC); clay with medium to very coarse sand; 

moderately to poorly sorted; brown (10YR 5/3); slightly 

calcareous.

670 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; moderately to poorly sorted; brown 

(10YR 5/3); slightly calcareous.

680 Sandy clay (sC); clay with fine to coarse sand; moderately 

to poorly sorted; brown (10YR 5/3); slightly calcareous.

690 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; brown (10YR 5/3); slightly calcareous.

700 Sandy gravelly clay (gM); clay with granules to small 

pebbles and medium to very coarse sand; poorly sorted; 

brown (10YR 5/3); calcareous.

710 Sandy clay (sC); clay with medium to very coarse sand 

with trace granules; moderately to poorly sorted; brown 

(10YR 5/3); slightly calcareous.

720 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

730 Sandy gravelly clay (gM); clay with granules to small 

pebbles and medium to very coarse sand; poorly sorted; 

brown (10YR 5/3); calcareous.

740 Sandy clay (sC); clay with medium to very coarse sand; 

moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

750 Sandy silty clay (sM); clay with silt and fine to coarse 

sand; moderately to poorly sorted; brown (10YR 5/3); 

slightly calcareous.

760 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules; poorly sorted; brown 

(10YR 4/3); calcareous.

770 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules; poorly sorted; brown 

(10YR 5/3); calcareous.

780 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules; poorly sorted; brown 

(10YR 5/3); slightly calcareous.

790 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules; poorly sorted; brown 

(10YR 5/3); calcareous.

800 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; brown (10YR 5/3); 

slightly calcareous.

810 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

820 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules; very poorly sorted; yellowish 

brown (10YR 5/4); calcareous.

Depth 

(feet) Description

830 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

840 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

850 Gravelly sandy clay (gM); clay with medium to very 

coarse sand and granules to small pebbles; poorly 

sorted; yellowish brown (10YR 5/4); slightly 

calcareous.

860 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules; poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

870 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

880 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with silt, clay, and granules to medium pebbles; 

very poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4); slightly calcareous.

890 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; very dark grayish brown (10YR 3/2); 

fractured basalt.

900 Gravel (G); granules to medium pebbles with trace 

coarse to very coarse sand; well sorted; very angular to 

angular; very dark grayish brown (10YR 3/2); fractured 

basalt.

910 Gravel (G); granules to medium pebbles with trace 

coarse to very coarse sand; well sorted; very angular 

to angular; dark grayish brown (10YR 4/2); fractured 

basalt.

920 Gravel (G); granules to medium pebbles with trace 

coarse to very coarse sand; well sorted; very angular 

to angular; dark grayish brown (10YR 4/2); fractured 

basalt.

930 Gravel (G); granules to medium pebbles with trace 

coarse to very coarse sand; well sorted; very angular to 

angular; brown (10YR 4/3); fractured basalt.

940 Gravel (G); granules to medium pebbles with trace 

coarse to very coarse sand; well sorted; very angular to 

angular; brown (10YR 4/3); fractured basalt.

950 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

very angular to angular; very dark grayish brown 

(10YR 3/2); fractured basalt.

960 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

very angular to angular; very dark grayish brown 

(10YR 3/2); fractured basalt.

965

3C shoe

Basalt; fractured locally amygdaloidal vesicular basalt; 

very dark grayish brown (10YR 3/2).

Table 3A. Lithologic SHAKER log for multiple-well monitoring site CRTH2 (13N/05E-08B1S, -08B2S) Fort Irwin National Training Center, 

California.—Continued

[Altitude of land surface, approximately 1,432 feet. Drilled by U.S Geological Survey using mud-rotary drilling method, August 11, 2011. Total depth drilled, 

965 feet. Screened intervals, 920–940 and 270–290 feet.]
46 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

From To

0 20 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; yellowish brown 

(10YR 5/4); calcareous.

20 40 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 4/4); slightly micaceous.

40 60 Silty sand (zS); medium to very coarse sand with 

silt and trace granules; moderately to poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); calcareous.

60 80 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4); 

calcareous; micaceous.

80 100 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; subangular 

to subrounded; yellowish brown (10YR 5/4); 

calcareous.

100 105 No sample collected; cored interval.

105 120 Silty sand (zS); medium to very coarse sand with 

silt and trace granules; moderately to poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); slightly calcareous; micaceous.

120 140 Silty sand (zS); medium to very coarse sand with 

silt and trace granules; moderately to poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); calcareous; slightly micaceous.

140 160 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; yellowish brown 

(10YR 5/4); calcareous; micaceous.

160 180 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to medium pebbles; poorly 

sorted; subangular to subrounded; yellowish 

brown (10YR 5/4); calcareous; micaceous; trace 

caliche.

180 200 Silty clayey sand (mS); medium to very coarse 

sand with clay and silt; poorly sorted; subangular 

to subrounded; yellowish brown (10YR 5/4); 

calcareous.

200 220 Silty clayey sand (mS); fine to coarse sand with clay 

and silt; poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4); calcareous

Depth 

(feet) Description

From To

220 225 No sample collected; cored interval.

225 240 Silty sand (zS); fine to coarse sand with silt; 

moderately sorted; angular to subangular; 

yellowish brown (10YR 5/4); calcareous; slightly 

micaceous; trace caliche.

240 260 Silty clayey sand (mS); fine to coarse sand with clay 

and silt; poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/4); calcareous.

260 280 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; angular to 

subrounded; yellowish brown (10YR 5/4); slightly 

calcareous.

280 300 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; yellowish brown (10YR 5/4); 

calcareous; slightly micaceous.

300 320 Sand (S); fine to coarse sand with trace very 

coarse sand and silt; moderately sorted; angular 

to subangular; yellowish brown (10YR 5/4); 

calcareous.

320 340 Clay (C); clay with trace very fine to medium 

sand; well sorted; yellowish brown (10YR 5/4); 

calcareous.

340 360 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

360 380 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

380 400 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

400 420 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

420 440 Sandy silty clay (sM); clay with silt and fine to 

coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

440 460 Sandy silty clay (sM); clay with silt and fine to 

coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

460 480 Gravelly sandy silty clay (gM); clay with silt, 

medium to very coarse sand and granules; very 

poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

Table 3B. Lithologic SIEVE log for multiple-well monitoring site CRTH2 (13N/05E-08B1S, -08B2S) Fort Irwin National Training Center, 

California.

[Altitude of land surface, approximately 1,432 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 11, 2011. Total depth drilled, 

965 feet. Screened intervals, 920–940 and 270–290 feet.]
Tables 47

Depth 

(feet) Description

From To

480 500 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules; poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

500 520 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; moderately to poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

520 540 Silty clayey sand (mS); medium to very coarse 

sand with silt, clay and trace granules; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); calcareous.

540 560 Silty clayey sand (mS); medium to very coarse 

sand with silt and clay; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4); 

calcareous.

560 580 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

580 600 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

600 620 Silty sandy clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4).

620 640 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

640 660 Sandy silty clay (sM); clay with silt and fine to 

coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

660 680 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules to small pebbles; 

poorly to very poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

680 700 Gravelly sandy silty clay (gM); clay with silt, 

medium to very coarse sand and granules to small 

pebbles; very poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

700 720 Clayey silty sand (mS); medium to very coarse 

sand with silt and clay; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4); 

calcareous.

720 740 Clayey silty sand (mS); medium to very coarse 

sand with silt and clay; poorly sorted; subangular 

to subrounded; yellowish brown (10YR 5/4); 

calcareous.

Table 3B. Lithologic SIEVE log for multiple-well monitoring site CRTH2 (13N/05E-08B1S, -08B2S) Fort Irwin National Training Center, 

California.—Continued

[Altitude of land surface, approximately 1,432 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 11, 2011. Total depth drilled, 

965 feet. Screened intervals, 920–940 and 270–290 feet.]

Depth 

(feet) Description

From To

740 760 Silty clayey sand (mS); medium to very coarse 

sand with silt and clay; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4); 

calcareous.

760 780 Clayey silty sand (mS); medium to very coarse sand 

with silt, clay and trace granules; poorly to very 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4); calcareous.

780 800 Clayey silty sand (mS); fine to coarse sand with silt 

and clay; poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4); calcareous.

800 820 Sandy silty clay (sM); clay with silt and fine to 

coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

820 840 Gravelly sandy silty clay (gM); clay with silt, 

medium to very coarse sand and granules; very 

poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

840 860 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; subangular 

to subrounded; yellowish brown (10YR 5/4); 

calcareous.

860 880 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to small pebbles; moderately 

to poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/4); calcareous.

880 900 Gravelly silty sand (gmS); medium to very 

coarse sand with silt and granules to small 

pebbles; moderately to poorly sorted; angular 

to subangular; dark grayish brown (10YR 4/2); 

calcareous; basalt.

900 920 Gravelly silty sand (gmS); medium to very 

coarse sand with silt and granules to medium 

pebbles; moderately to poorly sorted; angular to 

subangular; brown (7.5YR 4/4); basalt.

920 940 Gravelly silty sand (gmS); medium to very 

coarse sand with silt and granules to small 

pebbles; moderately to poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4); slightly 

calcareous; basalt.

940 960 Sandy gravel (sG); granules to medium pebbles 

with medium to very coarse sand and trace silt; 

moderately sorted; very angular to angular; brown 

(10YR 4/3); basalt.

960 965 No sample collected; cored interval.
48 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

 10 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subangular to subrounded; light olive brown (2.5Y 5/3); 

highly calcareous.

20 Sandy gravel (sG); granules to large pebbles with coarse 

to very coarse sand; moderately to poorly sorted; 

subangular to subrounded; light yellowish brown 

(2.5Y 6/3); calcareous.

30 Sandy gravel (sG); granules to large pebbles with medium 

to very coarse sand; poorly sorted; subrounded; 

yellowish brown (10YR 5/4); calcareous.

40 Gravel (G); granules to large pebbles with minor coarse 

to very coarse sand; moderately sorted; subangular to 

subrounded; yellowish brown (10YR 5/4); calcareous.

50 Sandy gravel (sG); granules to large pebbles with fine to 

very coarse sand and minor clay; very poorly sorted; 

subrounded; brown (10YR 5/3); calcareous.

60 Sandy gravel (sG); granules to very large pebbles with 

medium to very coarse sand and trace clay; poorly 

sorted; subrounded; brown (10YR 5/3); calcareous.

70 Sandy gravel (sG); granules to large pebbles with medium 

to very coarse sand and minor clay; very poorly sorted; 

subrounded; brown (10YR 5/3); calcareous.

80 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and minor clay; poorly 

sorted; subrounded; brown (10YR 5/3); calcareous.

90 Gravelly sand (gS); medium to very coarse sand with 

granules; moderately to well sorted; subrounded to well 

rounded; yellowish brown (10YR 5/4); calcareous.

100 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; poorly sorted; subrounded; 

brown (10YR 5/3); calcareous.

110 Sandy gravel (sG); granules to small pebbles with medium 

to very coarse sand; moderately sorted; subangular 

to subrounded; light yellowish brown (2.5Y 6/3); 

calcareous.

120 Clayey sandy gravel (msG); granules to large pebbles with 

fine to very coarse sand and clay; very poorly sorted; 

subangular to rounded; yellowish brown (10YR 5/4); 

calcareous.

130 Gravelly clayey sand (gmS); fine to very coarse sand with 

clay and granules; very poorly sorted; subrounded to 

rounded; brown (10YR 5/3); calcareous.

140 Gravelly sand (gS); fine to very coarse sand with granules 

to small pebbles; poorly sorted; subrounded to rounded; 

brown (10YR 5/3); calcareous.

Depth 

(feet) Description

150 Slightly gravelly sandy clay ((g)sM); clay with fine to very 

coarse sand and granules to small pebbles; very poorly 

sorted; yellowish brown (10YR 5/4); calcareous.

160 Sandy clay (sC); clay with fine to very coarse sand and 

trace granules to small pebbles; poorly sorted; very pale 

brown (10YR 7/3); calcareous.

170 Sandy clay (sC); clay with medium to very coarse sand 

and trace granules to small pebbles; poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

180 Sandy clay (sC); clay with fine to very coarse sand and 

trace granules; poorly sorted; brown (10YR 5/3); 

calcareous.

190 Sandy clay (sC); clay with fine to coarse sand with trace 

granules; poorly sorted; brown (10YR 5/3); calcareous.

200 Slightly gravelly sandy clay ((g)sM); clay with fine to 

very coarse sand and granules to medium pebbles; very 

poorly sorted; brown (10YR 5/3); calcareous.

210 Clay (C); clay with minor fine to coarse sand and trace 

granules to small pebbles; moderately sorted; yellowish 

brown (10YR 5/4); calcareous.

220 Clay (C); clay with trace fine sand; very well sorted; 

yellowish brown (10YR 5/4); calcareous.

230 Gravel (G); granules to large pebbles with trace clay; well 

sorted; very angular; black (10YR 2/1); calcareous; 

basalt.

240 Gravel (G); granules to medium pebbles with minor 

clay; well sorted; angular to subangular; olive brown 

(2.5Y 4/3); calcareous; basalt.

250 Gravel (G); granules to medium pebbles with minor clay; 

well sorted; very angular; dark olive brown (2.5Y 3/3); 

calcareous; basalt.

260 Gravel (G); granules to medium pebbles; well sorted; 

angular; black (2.5Y 2.5/1); calcareous; basalt.

270 Gravel (G); granules to medium pebbles with trace 

medium sand; well sorted; angular; black (2.5Y 2.5/1); 

calcareous; basalt.

280 Slightly gravelly sandy clay ((g)sM); clay with medium 

to coarse sand and granules to medium pebbles; very 

poorly sorted; light yellowish brown (10YR 6/4); 

calcareous.

290 Clay (C); clay with trace medium to very coarse sand; 

moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

300 Sandy clay (sC); clay with medium to very coarse sand; 

poorly sorted; yellowish brown (10YR 5/4); calcareous.

310 Sandy clay (sC); clay with fine to very coarse sand; poorly 

sorted; yellowish brown (10YR 5/4); calcareous.

Table 4A. Lithologic SHAKER log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]
Tables 49

Depth 

(feet) Description

320 Clayey silt (M); silt and clay with minor very fine 

sand; well sorted; light yellowish brown (10YR 6/4); 

calcareous.

330 Sandy clay (sC); clay with very fine to fine sand and trace 

very coarse sand; well sorted; light yellowish brown 

(10YR 6/4); calcareous.

340 Clay (C); clay with minor very fine to fine sand; very well 

sorted; yellowish brown (10YR 5/4); calcareous.

350 Clay (C); clay; very well sorted; yellowish brown 

(10YR 5/4); calcareous.

360 Clay (C); clay with trace medium sand; very well sorted; 

yellowish brown (10YR 5/4); calcareous.

370 Clay (C); clay with trace fine to medium sand; very well 

sorted; yellowish brown (10YR 5/4); calcareous.

380 Clay (C); clay with trace medium sand and trace granules 

to small pebbles; well sorted; yellowish brown 

(10YR 5/4); calcareous.

383

1C shoe

Sandy silt (sZ); silt with very fine to medium sand; 

moderately sorted; yellowish brown (10YR 5/4); 

calcareous.

390 Clay (C); clay with trace granules to medium pebbles; 

well sorted; yellowish brown (10YR 5/4); calcareous.

400 Silty clay (M); clay and silt with minor medium to coarse 

sand and trace granules to medium pebbles; moderately 

sorted; yellowish brown (10YR 5/4); calcareous.

410 Silty clay (M); clay and silt with minor fine to medium 

sand; moderately to well sorted; yellowish brown 

(10YR 5/6); calcareous.

420 Silty clay (M); clay and silt with minor fine to medium 

sand; moderately to well sorted; yellowish brown 

(10YR 5/4); calcareous.

430 Clay (C); clay with trace fine to medium sand; very well 

sorted; yellowish brown (10YR 5/4); calcareous.

440 Silty clay (M); clay and silt with minor fine to medium 

sand; moderately to well sorted; yellowish brown 

(10YR 5/4); calcareous.

450 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; yellowish brown (10YR 5/4); 

calcareous.

460 Silty clay (M); clay and silt with minor fine to medium 

sand; moderately to well sorted; yellowish brown 

(10YR 5/4); calcareous.

470 Sandy clay (sC); clay with fine to coarse sand and minor 

silt; poorly sorted; yellowish brown (10YR 5/4).

480 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; yellowish brown (10YR 5/4); 

calcareous.

Depth 

(feet) Description

490 Sandy clay (sC); clay with medium to very coarse sand; 

poorly sorted; yellowish brown (10YR 5/4); calcareous.

500 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; yellowish brown (10YR 5/4); calcareous.

510 Clay (C); clay with trace medium to coarse sand; well 

sorted; brown (10YR 5/3); calcareous.

520 Sandy silty clay (sM); clay and silt with fine to very 

coarse sand; very poorly sorted; brown (10YR 5/3); 

calcareous.

530 Sandy clay (sC); clay with fine to coarse sand and minor 

silt; poorly sorted; brown (10YR 5/3); calcareous.

540 Sandy clay (sC); clay with fine to very coarse sand and 

minor silt; very poorly sorted; dark grayish brown 

(10YR 4/2); calcareous.

550 Silty clay (M); clay with silt and minor very fine to 

medium sand; moderately sorted; brown (10YR 5/3); 

calcareous.

560 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately sorted; brown (10YR 5/3); 

calcareous.

570 Sandy clay (sC); clay with fine to very coarse sand 

and minor silt; very poorly sorted; light olive brown 

(2.5Y 5/3); calcareous.

580 Sandy clay (sC); clay with fine to medium sand and trace 

granules to small pebbles; moderately to poorly sorted; 

brown (10YR 5/3).

590 Sandy clay (sC); clay with fine to coarse sand and trace 

granules to small pebbles; poorly sorted; brown 

(10YR 4/3); calcareous.

600 Sandy silty clay (sM); clay and silt with very fine to coarse 

sand; very poorly to poorly sorted; brown (10YR 5/3); 

calcareous.

608

2C shoe

Silty clayey gravel (mG); granules to large pebbles with 

clay and silt; very poorly sorted; rounded; olive brown 

(2.5Y 4/3); calcareous; gravel-size gypsum (evaporite) 

fragments.

610 Sandy silty clay (sM); clay with silt and very fine to 

coarse sand; poorly sorted; grayish brown (2.5Y 5/2); 

calcareous.

620 Sandy clayey gravel (msG); granules to small pebbles 

with clay and fine to medium sand; very poorly sorted; 

subangular to subrounded; light olive brown (2.5Y 5/3); 

calcareous; gravel-size gypsum (evaporite) fragments.

630 Sandy clay (sC); clay with fine to very coarse sand with 

minor granules to small pebbles; very poorly sorted; 

yellowish brown (10YR 5/4); calcareous.

Table 4A. Lithologic SHAKER log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]
50 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Table 4A. Lithologic SHAKER log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]

Depth 

(feet) Description

640 Slightly gravelly sandy clay ((g)sM); clay with fine to 

coarse sand and granules to medium pebbles; very 

poorly sorted; brown (10YR 5/3); calcareous.

650 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; grayish brown 

(10YR 5/2); calcareous.

660 Slightly gravelly sandy clay ((g)sM); clay with fine to very 

coarse sand and granules to small pebbles; very poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

670 Slightly gravelly sandy silty clay ((g)sM); clay and 

silt with fine to very coarse sand and granules to 

small pebbles; very poorly sorted; light olive brown 

(2.5Y 5/3); calcareous.

680 Slightly gravelly sandy clay ((g)sM); clay with medium to 

coarse sand and granules to small pebbles; very poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

690 Slightly gravelly sandy clay ((g)sM); clay with fine to very 

coarse sand and granules to small pebbles; very poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

700 Sandy clay (sC); clay with fine to very coarse sand 

and minor silt; very poorly sorted; light olive brown 

(2.5Y 5/4); calcareous.

710 Sandy clay (sC); clay with fine to coarse sand and minor 

silt; poorly sorted; light yellowish brown (2.5Y 6/3); 

calcareous.

720 Sandy silty clay (sM); clay with silt and medium to 

coarse sand; poorly sorted; grayish brown (2.5Y 5/2); 

calcareous.

730 Sandy silty clay (sM); clay with silt and fine to coarse 

sand with trace granules; poorly sorted; brown 

(10YR 5/3); calcareous.

740 Slightly gravelly sandy clay ((g)sM); clay with fine to 

coarse sand and granules to small pebbles; very poorly 

sorted; brown (10YR 5/3); calcareous.

750 Sandy silty clay (sM); clay with silt and fine to very coarse 

sand with trace granules; poorly sorted; grayish brown 

(10YR 5/2); calcareous.

760 Sandy silty clay (sM); clay with silt and fine to coarse 

sand with trace granules; poorly sorted; grayish brown 

(10YR 5/2); slightly calcareous.

770 Sandy silty clay (sM); clay with silt and fine to coarse 

sand with trace granules to small pebbles; poorly sorted; 

brown (10YR 5/3); calcareous.

780 Sandy silty clay (sM); clay with silt and fine to coarse 

sand with trace granules to small pebbles; poorly sorted; 

brown (10YR 5/3); calcareous.

Depth 

(feet) Description

790 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; brown (10YR 5/3); calcareous.

800 Sandy silty clay (sM); clay with silt, fine to medium sand, 

minor coarse sand and trace granules to small pebbles; 

poorly sorted; brown (10YR 5/3); calcareous.

810 Sandy silty clay (sM); clay with silt and fine to medium 

sand; moderately sorted; brown (10YR 5/3); calcareous.

820 Sandy silty clay (sM); clay with silt and fine to medium 

sand; moderately sorted; brown (10YR 5/3); calcareous.

830 Sandy clay (sC); clay with fine to medium and minor 

coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

840 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; brown (10YR 5/3); slightly 

calcareous.

850 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; brown (10YR 5/3); slightly 

calcareous.

860 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; brown (10YR 5/3); calcareous.

863

3C shoe

No Recovery.

870 Sandy silty clay (sM); clay and silt with fine to coarse 

sand; poorly sorted; grayish brown (10YR 5/2); 

calcareous.

880 Sandy clay (sC); clay with very fine to coarse sand and 

trace granules; poorly sorted; brown (10YR 5/3); 

calcareous.

890 Slightly gravelly sandy clay ((g)sM); clay with very fine 

to medium sand and granules; poorly sorted; brown 

(10YR 5/3); calcareous.

900 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately sorted; brown (10YR 5/3); 

calcareous.

910 Sandy clay (sC); clay with fine to medium sand; 

moderately sorted; brown (10YR 5/3); calcareous.

920 Sandy clay (sC); clay with fine to medium and minor 

coarse sand; poorly sorted; grayish brown (10YR 5/2); 

calcareous.

930 Sandy clay (sC); clay with very fine to medium sand; 

moderately sorted; grayish brown (10YR 5/2); 

calcareous.

940 Sandy clay (sC); clay with very fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

950 Sandy clay (sC); clay with very fine to medium sand; 

moderately sorted; grayish brown (10YR 5/2); 

calcareous.
Tables 51

Table 4A. Lithologic SHAKER log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]

Depth 

(feet) Description

960 Sandy clay (sC); clay with very fine to coarse sand; poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

970 Sandy clay (sC); clay with very fine to coarse sand and 

minor very coarse sand; poorly sorted; grayish brown 

(10YR 5/2); calcareous.

980 Sandy clay (sC); clay with very fine to coarse sand and 

trace granules to small pebbles; very poorly sorted; 

brown (10YR 5/3); calcareous.

990 Sandy clay (sC); clay with very fine to coarse sand and 

trace granules; poorly sorted; brown (10YR 5/3); 

calcareous.

1,000 Clayey sand (cS); medium to coarse sand with clay and 

trace granules; poorly sorted; subangular to subrounded; 

grayish brown (10YR 5/2); calcareous.

1,010 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; grayish brown (10YR 5/2); calcareous.

1,020 Sandy clay (sC); clay with fine to very coarse sand 

and trace granules; poorly sorted; grayish brown 

(10YR 5/2); calcareous.

1,030 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

1,040 Sandy clay (sC); clay with fine to very coarse sand; poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

1,050 Sandy clay (sC); clay with very fine to very coarse sand 

and trace granules; poorly sorted; dark grayish brown 

(10YR 4/2); calcareous.

1,060 Sandy clay (sC); clay with very fine to very coarse sand 

and trace granules; poorly sorted; brown (10YR 5/3); 

calcareous.

1,070 Sandy clay (sC); clay with fine to very coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,080 Sandy clay (sC); clay with very fine to very coarse sand 

and trace granules to small pebbles; poorly sorted; 

brown (10YR 5/3); calcareous.

1,090 Sandy clay (sC); clay with fine to very coarse sand with 

trace granules; very poorly sorted; light olive brown 

(2.5Y 5/3); calcareous.

1,100 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,110 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; dark grayish brown (10YR 4/2); calcareous.

1,120 Sandy clay (sC); clay with very fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,130 Sandy clay (sC); clay with very fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,140 Sandy clay (sC); clay with very fine to coarse sand 

and minor silt; poorly sorted; brown (10YR 5/3); 

calcareous.

Depth 

(feet) Description

1,150 Sandy clay (sC); clay with very fine to coarse sand; poorly 

sorted; olive brown (2.5Y 4/3); calcareous.

1,160 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; light olive brown (2.5Y 5/3); calcareous.

1,170 Sandy clay (sC); clay with medium to coarse sand and 

trace granules; poorly sorted; olive brown (2.5Y 4/3); 

calcareous.

1,180 Sandy clay (sC); clay with fine to medium sand; 

moderately to poorly sorted; olive brown (2.5Y 4/3); 

calcareous.

1,190 Sandy clay (sC); clay with fine to very coarse sand and 

trace granules; poorly sorted; brown (10YR 5/3); 

calcareous.

1,200 Sandy clay (sC); clay with very fine to coarse sand 

and minor silt; poorly sorted; brown (10YR 5/3); 

calcareous.

1,210 Sandy clay (sC); clay with fine to coarse sand and minor 

silt; poorly sorted; brown (10YR 5/3); calcareous.

1,220 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,230 Sandy clay (sC); clay with very fine to medium sand with 

trace granules to small pebbles; moderately to poorly 

sorted; brown (10YR 5/3); calcareous.

1,240 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,250 Sandy clay (sC); clay with very fine to medium sand; 

moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

1,260 Sandy clay (sC); clay with very fine to medium sand; 

moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

1,270 Sandy clay (sC); clay with very fine to medium sand; 

moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

1,280 Sandy clay (sC); clay with fine to coarse sand; poorly 

sorted; brown (10YR 5/3); calcareous.

1,290 Sandy clay (sC); clay with fine to medium sand; 

moderately to poorly sorted; grayish brown (10YR 5/2); 

calcareous.

1,298 Sandy silty clay (sM); clay and silt with very fine to coarse 

sand; poorly sorted; brown (10YR 5/3); calcareous.

1,301

4C shoe

Sandy silt (sZ); silt with very fine to medium sand; 

moderately to poorly sorted; dark grayish brown 

(2.5Y 4/2); calcareous
52 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

From To

0 20 Sandy gravel (sG); granules to large pebbles 

with very fine to very coarse sand; very poorly 

sorted; angular to subrounded; yellowish brown 

(10YR 5/4); calcareous.

20 40 Silty sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and 

silt; very poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/4); calcareous.

40 60 Sandy gravel (sG); granules to medium pebbles 

with very fine to very coarse sand and minor silt; 

very poorly sorted; subrounded; yellowish brown 

(10YR 5/4); calcareous.

60 80 Sandy gravel (sG); granules to large pebbles with 

very fine to very coarse sand and minor silt; very 

poorly sorted; subrounded; yellowish brown 

(10YR 5/4); calcareous.

80 100 Gravelly sand (gS); fine to very coarse sand 

with granules to small pebbles; poorly sorted; 

subangular to subrounded; light olive brown 

(2.5Y 5/4); calcareous.

100 120 Gravelly sand (gS); fine to very coarse sand with 

granules to medium pebbles; very poorly sorted; 

subrounded to rounded; light olive brown 

(2.5Y 5/4); calcareous.

120 140 Gravelly sand (gS); very fine to very coarse sand 

with granules to medium pebbles; very poorly 

sorted; subangular to rounded; brown (10YR 5/3); 

calcareous.

140 160 Slightly gravelly sand ((g)S); very fine to very 

coarse sand with granules to small pebbles; very 

poorly sorted; subrounded to rounded; brown 

(10YR 5/3); calcareous.

160 180 Slightly gravelly sand ((g)S); very fine to coarse 

sand with granules to small pebbles and minor 

clay; very poorly sorted; subangular to rounded; 

yellowish brown (10YR 5/4); calcareous.

180 200 Slightly gravelly clayey sand ((g)mS); very fine 

to very coarse sand with clay and granules to 

small pebbles; very poorly sorted; subangular 

to subrounded; yellowish brown (10YR 5/4); 

calcareous.

Depth 

(feet) Description

From To

200 220 Clayey sand (cS); very fine to very coarse sand 

and clay with trace granules to medium pebbles; 

very poorly sorted; subrounded; yellowish brown 

(10YR 5/4); calcareous.

220 240 Clayey sandy gravel (msG); granules to large 

pebbles with very fine to very coarse sand and 

clay; very poorly sorted; angular to rounded; very 

dark grayish brown (10YR 3/2); calcareous; basalt 

in interval.

240 260 Gravelly sand (gS); very fine to very coarse sand 

with granules to small pebbles; poorly sorted; 

subangular; black (10YR 2/1); calcareous; basalt.

260 280 Clayey sand (cS); very fine to coarse sand with 

clay and trace granules to small pebbles; very 

poorly sorted; subrounded to subangular; brown 

(10YR 4/3); calcareous; basalt in interval.

280 300 Sandy clay (sC); clay with very fine to medium sand 

and trace granules to medium pebbles; moderately 

sorted; brown (10YR 4/3); calcareous; gravel-size 

gypsum (evaporite) fragments.

300 320 Clayey sand (cS); very fine to coarse sand with clay; 

poorly sorted; subrounded to well rounded; brown 

(10YR 5/3); calcareous.

320 340 Sandy silty clay (sM); clay and silt with very fine 

to coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

340 360 Sandy clay (sC); clay with very fine to coarse sand; 

poorly sorted; brown (10YR 5/3); calcareous.

360 380 Sandy silty clay (sM); clay with silt and very fine 

to medium sand with trace granules; moderately 

sorted; brown (10YR 5/3); calcareous.

380 400 Sandy clay (sC); clay with very fine to coarse sand; 

poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

400 420 Sandy clay (sC); clay with very fine to coarse sand; 

poorly sorted; yellowish brown (10YR 5/4); 

calcareous.

420 440 Clayey sand (cS); very fine to coarse sand with 

clay; poorly sorted; subrounded to well rounded; 

yellowish brown (10YR 5/4); calcareous.

Table 4B. Lithologic SIEVE log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]
Tables 53

Depth 

(feet) Description

From To

440 460 Clayey sand (cS); very fine to medium sand with 

minor coarse sand and clay; poorly sorted; 

subrounded to well rounded; yellowish brown 

(10YR 5/4); calcareous.

460 480 Clayey sand (cS); very fine to coarse sand and 

clay with minor very coarse sand; poorly sorted; 

subrounded to well rounded; yellowish brown 

(10YR 5/4); calcareous.

480 500 Clayey silty sand (mS); very fine to very coarse 

sand with silt and clay; poorly sorted; subrounded 

to well rounded; yellowish brown (10YR 5/4); 

calcareous.

500 520 Clayey silty sand (mS); very fine to very coarse sand 

with silt and clay; poorly sorted; subrounded to 

well rounded; brown (10YR 5/3); calcareous.

520 540 Clayey silty sand (mS); very fine to coarse sand with 

silt and clay; poorly sorted; subrounded to well 

rounded; olive brown (2.5Y 4/3); calcareous.

540 560 Clayey silty sand (mS); very fine to coarse sand 

with silt and clay; poorly sorted; subrounded 

to well rounded; yellowish brown (10YR 5/4); 

calcareous.

560 580 Silty clayey sand (mS); very fine to coarse sand with 

clay and silt; poorly sorted; subrounded to well 

rounded; brown (10YR 5/3); calcareous.

580 600 Clayey silty sand (mS); very fine to medium sand 

with silt, clay and minor coarse sand; poorly 

sorted; subrounded to well rounded; brown 

(10YR 5/3); calcareous.

600 620 Sandy silty clay (sM); clay with silt and very fine 

to medium sand; moderately sorted; brown 

(10YR 5/3); calcareous.

620 640 Silty clayey sand (mS); very fine to coarse sand with 

clay and silt; poorly sorted; subrounded to well 

rounded; brown (10YR 5/3); calcareous.

640 660 Sandy silty clay (sM); clay and silt with very fine 

to coarse sand and minor very coarse sand; 

poorly sorted; light brownish gray (10YR 6/2); 

calcareous.

Depth 

(feet) Description

From To

660 680 Clayey silty sand (mS); very fine to coarse sand and 

silt with clay and trace granules to small pebbles; 

poorly sorted; subrounded to rounded; yellowish 

brown (10YR 5/4); calcareous.

680 700 Clayey silty sand (mS); very fine to coarse sand and 

silt with minor clay and trace granules; poorly 

sorted; subrounded to well rounded; light olive 

brown (2.5Y 5/3); calcareous.

700 720 Silty sand (zS); very fine to medium sand with silt; 

moderately sorted; subrounded to well rounded; 

brown (10YR 5/3); calcareous.

720 740 Silty sand (zS); very fine to medium sand and silt 

with minor coarse sand; moderately sorted; 

subrounded to well rounded; brown (10YR 5/3); 

calcareous.

740 760 Silty sand (zS); very fine to coarse sand with silt; 

moderately to poorly sorted; rounded to well 

rounded; brown (10YR 5/3); calcareous.

760 780 Silty sand (zS); very fine to medium sand with silt; 

moderately sorted; subrounded to well rounded; 

brown (10YR 5/3); calcareous.

780 800 Silty sand (zS); very fine to coarse sand with silt; 

moderately to poorly sorted; subrounded to 

rounded; brown (10YR 5/3); calcareous.

800 820 Silty sand (zS); very fine to coarse sand with silt; 

moderately to poorly sorted; subrounded to well 

rounded; brown (10YR 5/3); calcareous.

820 840 Clayey silty sand (mS); very fine to coarse sand with 

silt and clay; poorly sorted; subrounded to well 

rounded; brown (10YR 5/3); calcareous.

840 860 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

860 880 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; grayish brown 

(10YR 5/2); calcareous.

880 900 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

Table 4B. Lithologic SIEVE log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]
54 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Table 4B. Lithologic SIEVE log for multiple-well monitoring site CRTH1 (13N/05E-28Q1S, -28Q2S, -28Q3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 1,577 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 10, 2011. Total depth drilled, 

1,310 feet. Screened intervals, 1,240–1,260, 700–720, 235–255 and 175–195 feet.]

Depth 

(feet) Description

From To

900 920 Silty clayey sand (mS); very fine to coarse sand with 

clay and silt; poorly sorted; subrounded to well 

rounded; grayish brown (10YR 5/2); calcareous.

920 940 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; poorly sorted; rounded to well 

rounded; grayish brown (10YR 5/2); calcareous.

940 960 Silty clayey sand (mS); very fine to coarse sand 

and clay with silt and trace granules to medium 

pebbles; poorly sorted; subrounded to well 

rounded; grayish brown (10YR 5/2); calcareous.

960 980 Silty clayey sand (mS); very fine to coarse sand with 

clay and silt; poorly sorted; subrounded to well 

rounded; grayish brown (10YR 5/2); calcareous.

980 1,000 Silty clayey sand (mS); very fine to coarse sand and 

clay with silt and trace granules; poorly sorted; 

subrounded to well rounded; grayish brown 

(10YR 5/2); calcareous.

1,000 1,020 Silty clayey sand (mS); very fine to very coarse sand 

with clay and silt; poorly sorted; subrounded to 

rounded; light olive brown (2.5Y 5/3); calcareous.

1,020 1,040 Silty clayey sand (mS); fine to coarse sand with clay 

and silt; poorly sorted; rounded to well rounded; 

grayish brown (10YR 5/2); slightly calcareous.

1,040 1,060 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; poorly sorted; rounded to 

well rounded; olive brown (2.5Y 4/3); slightly 

calcareous.

1,060 1,080 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; poorly sorted; rounded to well 

rounded; olive brown (2.5Y 4/3); calcareous.

1,080 1,100 Silty clayey sand (mS); very fine to medium sand 

with clay and silt; moderately sorted; rounded to 

well rounded; brown (10YR 5/3); calcareous.

1,100 1,120 Silty clayey sand (mS); very fine to medium sand 

with clay and silt; moderately sorted; subrounded 

to well rounded; olive brown (2.5Y 4/3); 

calcareous.

Depth 

(feet) Description

From To

1,120 1,140 Silty clayey sand (mS); very fine to coarse sand with 

clay and silt; poorly sorted; subrounded to well 

rounded; olive brown (2.5Y 4/3); calcareous.

1,140 1,160 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; poorly sorted; rounded to well 

rounded; olive brown (2.5Y 4/3); calcareous.

1,160 1,180 Silty clayey sand (mS); very fine to medium sand 

with clay and silt; moderately sorted; subrounded 

to well rounded; dark grayish brown (10YR 4/2); 

calcareous.

1,180 1,200 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; poorly sorted; rounded to well 

rounded; brown (10YR 5/3); calcareous.

1,200 1,220 Clayey silty sand (mS); very fine to medium 

sand and silt with clay and minor coarse sand; 

moderately to poorly sorted; subrounded to well 

rounded; brown (10YR 5/3); calcareous.

1,220 1,240 Clayey silty sand (mS); very fine to medium sand 

with silt and clay; moderately sorted; rounded 

to well rounded; grayish brown (2.5Y 5/2); 

calcareous.

1,240 1,260 Clayey silty sand (mS); very fine to coarse sand, silt 

and clay with trace granules to medium pebbles; 

poorly sorted; rounded to well rounded; brown 

(10YR 5/3); calcareous.

1,260 1,280 Clayey silty sand (mS); very fine to medium silt and 

clay with minor coarse sand; moderately sorted; 

rounded to well rounded; brown (10YR 5/3); 

calcareous.

1,280 1,298 Clayey silty sand (mS); very fine to coarse sand with 

silt and clay; poorly sorted; subrounded to well 

rounded; brown (10YR 5/3); calcareous

1,298 1,301 No sample collected; cored interval.
Tables 55

Depth 

(feet) Description

10 Sandy gravel (sG); granules to large pebbles and medium 

to very coarse sand; poorly sorted; subangular to 

angular; light olive brown (2.5Y 5/4); calcareous.

20 Sandy gravel (sG); granules to large pebbles and 

coarse to very coarse sand; poorly sorted; angular to 

subangular; light olive brown (2.5Y 5/3); calcareous.

30 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; poorly 

sorted; angular to subangular; light yellowish brown 

(2.5Y 6/3); calcareous.

40 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand and trace silt; poorly sorted; 

angular to subangular; light olive brown (2.5Y 5/3); 

calcareous.

50 Silty sandy gravel (msG); granules to large pebbles with 

medium to very coarse sand and silt; poorly sorted; 

angular to subangular; brown (7.5YR 4/4).

60 Silty sandy gravel (msG); granules to large pebbles with 

medium to very coarse sand and silt; poorly sorted; 

angular to subangular; strong brown (7.5YR 4/6).

70 Silty sandy gravel (msG); granules to large pebbles with 

medium to very coarse sand and silt; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

80 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

90 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

100 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

102

1C bottom

Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subrounded; brown (10YR 4/3).

110 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

120 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

Depth 

(feet) Description

130 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subrounded; light olive brown 

(2.5Y 5/3).

140 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to medium pebbles, and trace clay; 

poorly to very poorly sorted; angular to subangular; 

light olive brown (2.5Y 5/3).

150 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to medium pebbles, and trace clay; 

poorly to very poorly sorted; angular to subangular; 

olive brown (2.5Y 4/3).

160 Sandy clayey silt (sM); silt with clay, fine to coarse sand 

and trace granules; poorly sorted; light olive gray 

(5Y 6/2).

170 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; very 

poorly sorted; angular to subangular; light brownish 

gray (2.5Y 6/2).

180 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to medium pebbles, and trace clay; 

poorly to very poorly sorted; angular to subangular; 

light brownish gray (2.5Y 6/2).

190 Slightly gravelly sandy silt ((g)sM); silt with medium 

to very coarse sand and granules to medium pebbles; 

poorly to very poorly sorted; light brownish gray 

(2.5Y 6/2).

200 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; grayish brown (2.5Y 5/2).

210 Slightly gravelly sandy silt ((g)sM); silt with medium to 

very coarse sand and granules to small pebbles; poorly 

sorted; light brownish gray (2.5Y 6/2).

220 Slightly gravelly sandy silt ((g)sM); silt with medium to 

very coarse sand, granules to small pebbles, and trace 

clay; poorly to very poorly sorted; light brownish gray 

(2.5Y 6/2).

222

2C bottom

Sandy silt (sZ); silt with very fine to medium sand, trace 

clay, and trace coarse sand; moderately to poorly 

sorted; grayish brown (2.5Y 5/2).

230 Slightly gravelly sandy silt ((g)sM); silt with fine to 

coarse sand and granules to large pebbles; poorly 

sorted; light yellowish brown (2.5Y 6/3)

240 Sandy clayey silt (sM); silt with clay and fine to 

coarse sand; moderately to poorly sorted; light gray 

(2.5Y 7/2).

Table 5A. Lithologic SHAKER log for multiple-well monitoring site GOLD2 (14N/01E-07R1S, -07R2S, -07R3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,107 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 9, 2012. Total depth drilled, 

451 feet. Screened intervals, 420–440, 330–350, and 220–240 feet. Ream, sample was collected while enlarging the hole after coring or following a change in 

the drill bit size or type; Washed, sample was washed to remove fine grained material and drilling mud]
56 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

250 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules; very poorly sorted; 

light yellowish brown (2.5Y 6/4); calcareous.

260 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

medium to very coarse sand and granules to small 

pebbles; very poorly sorted; light yellowish brown 

(10YR 6/4); slightly calcareous.

270 Slightly gravelly sandy clay ((g)sM); clay with fine to 

coarse sand and granules to small pebbles; poorly to 

very poorly sorted; light yellowish brown (2.5Y 6/4); 

slightly calcareous.

280 Slightly gravelly sandy clay ((g)sM); clay with fine to 

coarse sand and granules to medium pebbles; poorly 

to very poorly sorted; light brownish gray (2.5Y 6/2); 

calcareous.

290 Sandy silty clay (sM); clay with silt, very fine to medium 

sand and trace granules; poorly to very poorly sorted; 

light olive brown (2.5Y 5/4); slightly calcareous.

300 Slightly gravelly sandy clay ((g)sM); clay with medium 

to very coarse sand, granules to small pebbles and 

trace silt; poorly to very poorly sorted; light yellowish 

brown (2.5Y 6/3).

310 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules to small pebbles; very 

poorly sorted; pale yellow (2.5Y 7/3); calcareous.

320 Sandy silty clay (sM); clay with silt, fine to coarse sand 

and trace granules; poorly to very poorly sorted; light 

olive brown (2.5Y 5/4); calcareous.

330 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

medium to very coarse sand and granules to small 

pebbles; very poorly sorted; olive (5Y 5/3); calcareous.

340 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules to medium pebbles; 

very poorly sorted; pale olive (5Y 6/3); calcareous.

340

Ream 

washed

Gravel (G); small to large pebbles; moderately to 

well sorted; angular to subangular; light olive gray 

(5Y 6/2); calcareous.

350 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules to small pebbles; very 

poorly sorted; light gray (5Y 7/2); calcareous.

360 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; poorly 

sorted; angular to very angular; olive gray (5Y 5/2); 

slightly calcareous.

Depth 

(feet) Description

360

Washed

Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; very well to well sorted; 

angular to very angular; multicolored; calcareous.

370 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

medium to coarse sand and granules to small pebbles; 

very poorly sorted; light olive brown (2.5Y 5/4); 

calcareous.

380 Sandy silty clay (sM); clay with silt, fine to medium sand 

and trace granules to small pebbles; poorly to very 

poorly sorted; light olive brown (2.5Y 5/4); calcareous.

390 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand and trace granules; poorly to very poorly 

sorted; olive (5Y 4/3); slightly calcareous.

400 Sandy silty clay (sM); clay with silt, very fine to medium 

sand and trace granules to small pebbles; poorly to 

very poorly sorted; olive gray (5Y 4/2).

400

3C top

Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules to large pebbles; very 

poorly sorted; olive (5Y 4/3); calcareous.

403

3C bottom

Sandy silty clay (sM); clay with silt and fine to medium 

sand; moderately sorted; olive gray (5Y 4/2); slightly 

calcareous.

410 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules to small pebbles; very 

poorly sorted; olive (5Y 4/3); calcareous.

420 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

medium to very coarse sand and granules; very poorly 

sorted; olive (5Y 4/3); calcareous.

430 Slightly gravelly sandy silty clay ((g)sM); clay with silt, 

fine to coarse sand and granules to small pebbles; very 

poorly sorted; olive (5Y 5/3); slightly calcareous.

440 Sandy silty clay (sM); clay with silt, very fine to medium 

sand and trace coarse to very coarse sand; moderately 

to poorly sorted; olive gray (5Y 4/2); slightly 

calcareous.

450 Sandy silty clay (sM); clay with silt, medium to coarse 

sand and trace granules to small pebbles; poorly to 

very poorly sorted; dark gray (5Y 4/1); calcareous; 

basalt?

451

4C bottom

Gravel (G); medium to very large pebbles; well sorted; 

angular; black (5Y 2.5/1); calcareous; basalt; aphanitic 

(boulder or flow?).

Table 5A. Lithologic SHAKER log for multiple-well monitoring site GOLD2 (14N/01E-07R1S, -07R2S, -07R3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,107 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 9, 2012. Total depth drilled, 

451 feet. Screened intervals, 420–440, 330–350, and 220–240 feet. Ream, sample was collected while enlarging the hole after coring or following a change in 

the drill bit size or type; Washed, sample was washed to remove fine grained material and drilling mud]
Tables 57

Depth

(feet) Description

From To

0 20 Gravelly sand (gS); medium to very coarse sand 

with granules to large pebbles; moderately 

sorted; subrounded to subangular; olive brown 

(2.5Y 4/3); calcareous.

20 40 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to large pebbles; 

poorly sorted; subrounded to subangular; olive 

brown (2.5Y 4/3); calcareous.

40 60 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to large pebbles; poorly sorted; 

subrounded to subangular; brown (7.5YR 4/3); 

slightly calcareous.

60 80 Gravelly sand (gS); medium to very coarse 

sand with granules to large pebbles and trace 

silt; moderately to poorly sorted; rounded 

to subangular; brown (7.5YR 4/3); slightly 

calcareous.

80 100 Gravelly sand (gS); medium to very coarse 

sand with granules to large pebbles and trace 

silt; moderately to poorly sorted; rounded to 

subangular; dark brown (10YR 3/3); trace mica.

100 120 Silty gravelly sand (gmS); medium to very coarse 

sand with granules to medium pebbles and silt; 

poorly sorted; subrounded to subangular; olive 

brown (2.5Y 4/3).

120 140 Silty gravelly sand (gmS); medium to very coarse 

sand with granules to small pebbles and silt; 

poorly sorted; subrounded to subangular; light 

olive brown (2.5Y 5/3).

140 160 Silty gravelly sand (gmS); fine to coarse sand with 

silt and granules to medium pebbles; poorly 

sorted; rounded to subangular; light olive brown 

(2.5Y 5/3).

160 180 Silty gravelly sand (gmS); medium to very coarse 

sand with granules to medium pebbles and silt; 

poorly sorted; subrounded to angular; light 

brownish gray (2.5Y 6/2); trace mica.

180 200 Silty gravelly sand (gmS); fine to coarse sand with 

granules to medium pebbles and silt; poorly 

sorted; rounded to subangular; grayish brown 

(2.5Y 5/2); trace mica.

200 220 Silty gravelly sand (gmS); fine to coarse sand 

with granules to small pebbles, silt and trace 

clay; poorly to very poorly sorted; rounded to 

subangular; grayish brown (2.5Y 5/2); trace mica.

220 240 Silty gravelly sand (gmS); very fine to medium sand 

with silt and granules to small pebbles; poorly 

sorted; rounded to subangular; light olive brown 

(2.5Y 5/3).

Depth

(feet) Description

From To

240 260 Silty gravelly sand (gmS); very fine to medium sand 

with granules to small pebbles, silt, and trace 

clay; poorly to very poorly sorted; subrounded to 

subangular; light olive brown (2.5Y 5/4); slightly 

calcareous.

260 280 Silty gravelly sand (gmS); very fine to medium sand 

with granules to small pebbles, silt, and trace 

clay; poorly to very poorly sorted; subrounded 

to subangular; light yellowish brown (2.5Y 6/3); 

calcareous.

280 300 Sandy silt (sZ); silt with very fine to medium sand, 

trace clay, and trace granules to small pebbles; 

moderately to poorly sorted; light olive brown 

(2.5Y 5/4); calcareous.

300 320 Sandy silt (sZ); silt with very fine to medium sand 

and trace granules to small pebbles; moderately 

to poorly sorted; light olive brown (2.5Y 5/4); 

calcareous.

320 340 Slightly gravelly sandy silt ((g)sM); silt with fine to 

medium sand, granules to small pebbles, and trace 

clay; poorly to very poorly sorted; reddish brown 

(2.5YR 5/3); calcareous.

340 360 Slightly gravelly sandy silt ((g)sM); silt with fine to 

coarse sand, granules to small pebbles, and trace 

clay; poorly to very poorly sorted; light olive gray 

(5Y 6/2); calcareous.

360 380 Slightly gravelly sandy clayey silt ((g)sM): silt with 

clay, very fine to medium sand, and granules; 

very poorly sorted; light olive brown (2.5Y 5/4); 

slightly calcareous.

380 400 Sandy clayey silt (sM); silt with clay, very fine to 

medium sand, and trace coarse sand; moderately 

sorted; olive gray (5Y 4/2); slightly calcareous.

400 420 Sandy silt (sZ); silt with very fine to medium sand; 

very well to well sorted; olive gray (5Y 4/2); 

calcareous; micaceous.

420 440 Sandy gravelly silt (gM); silt with very fine to 

medium sand, granules, and trace clay; poorly to 

very poorly sorted; olive gray (5Y 4/2); slightly 

calcareous; micaceous.

440 450 Sandy gravelly silt (gM); silt with very fine to 

medium sand, trace granules, and trace silt; 

poorly sorted; olive gray (5Y 4/2); calcareous; 

micaceous.

450 451 No sample collected; cored interval.

Table 5B. Lithologic SIEVE log for multiple-well monitoring site GOLD2 (14N/01E-07R1S, -07R2S, -07R3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,107 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 9, 2012. Total depth drilled, 

451 feet. Screened intervals, 420–440, 330–350, and 220–240 feet.]
58 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

5 Clay (C); clay with trace very fine to fine sand; well 

1C shoe sorted; brown (7.5YR 5/4); calcareous.

10 Clay (C); clay with trace very fine to fine sand; well 

2C shoe sorted; brown (7.5YR 4/4); calcareous. 

15 Clay (C); clay with trace very fine to fine sand; well 

3C shoe sorted; brown (7.5YR 5/4); calcareous.

20 Clay (C); clay with trace very fine to fine sand; well 

4C shoe sorted; brown (7.5YR 5/4); calcareous.

25 Clay (C); clay with trace very fine to fine sand; well 

5C shoe sorted; brown (7.5YR 5/4); calcareous.

26.5 Clay (C); clay with trace very fine to fine sand; well 

6C shoe sorted; brown (7.5YR 5/4); calcareous.

30 Clay (C); clay with trace very fine to fine sand; well 

7C shoe sorted; brown (7.5YR 5/4); calcareous.

35 Clay (C); clay with trace very fine to fine sand; well 

8C shoe sorted; brown (7.5YR 5/4); calcareous.

40 Clay (C); clay with trace very fine to fine sand; well 

9C shoe sorted; brown (7.5YR 4/4); calcareous.

45 Clay (C); clay with trace very fine to fine sand; well 

10C shoe sorted; brown (7.5YR 5/4).

50 Clay (C); clay with trace very fine to fine sand; well 

sorted; yellowish brown (10YR 5/4); extremely 

calcareous.

11C shoe

55 Sandy silt (sZ); silt with very fine to fine sand; well 

12C shoe sorted; brown (7.5YR 5/4); slightly calcareous.

60 Silt (Z); silt with trace very fine to fine sand and trace 

large pebbles; moderately to well sorted; brown 

(7.5Y 5/4); calcareous.

13C shoe

70 Sandy clayey silt (sM); silt with clay, very fine to 

medium sand, and trace granules; moderately sorted; 

yellowish brown (10YR 5/4); calcareous.

80 Clay (C); clay with trace very fine to fine sand; well 

sorted; yellowish brown (10YR 5/6); calcareous.

90 Clay (C); clay with trace very fine to fine sand; well 

sorted; dark yellowish brown (10YR 4/4).

100 Clay (C); clay with trace very fine to fine sand; well 

sorted; yellowish brown (10YR 5/4).

Depth 

(feet) Description

110 Clay (C); clay with trace very fine to medium sand; well 

sorted; yellowish brown (10YR 5/4); calcareous.

120 Clay (C); clay with trace very fine to medium sand; well 

sorted; yellowish brown (10YR 5/4); calcareous.

130 Clay (C); clay with trace very fine to medium sand; well 

sorted; brown (7.5YR 4/4); slightly calcareous.

140 Silty clay (M); clay with silt and trace very fine to 

medium sand; moderately to well sorted; brown 

(7.5YR 4/4).

150 Clayey sandy silt (sM); silt with very fine to medium 

sand and clay; moderately sorted; yellowish brown 

(10YR 5/4); calcareous.

160 Clay (C); clay with trace very fine to fine sand; well 

sorted; yellowish brown (10YR 5/4).

170 Gravelly clayey silty sand (gmS); medium to very 

coarse sand with silt, clay, and granules; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4); slightly calcareous.

180 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; very 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4).

190 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules; very poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

200 Sandy silty clay (sM); clay with silt and fine sand with 

trace coarse sand; moderately sorted; dark yellowish 

brown (10YR 4/4); slightly calcareous.

210 Sandy silty clay (sM); clay with silt and fine to coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4).

220 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules with trace small 

to medium pebbles; very poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

Table 6A. Lithologic SHAKER log for multiple-well monitoring site BLA5 (14N/03E-26K1S, -26K2S, -26K3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 2,345 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 19, 2011. Total depth drilled, 

370 feet. Screened intervals, 320–340, 190–210, and 190–210 feet. Washed—sample was washed to remove fine grained material and drilling mud]
Tables 59

Table 6A. Lithologic SHAKER log for multiple-well monitoring site BLA5 (14N/03E-26K1S, -26K2S, -26K3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,345 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 19, 2011. Total depth drilled, 

370 feet. Screened intervals, 320–340, 190–210, and 190–210 feet. Washed—sample was washed to remove fine grained material and drilling mud]

Depth 

(feet) Description

230 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; moderately to 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4); slightly calcareous.

240 Silty sandy gravel (msG); granules to medium pebbles 

with silt and coarse to very coarse sand; moderately to 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4); slightly calcareous.

250 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; moderately to 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4); slightly micaceous.

260 Silty clayey gravelly sand (gmS); medium to very coarse 

sand with granules to small pebbles, clay and silt; 

very poorly sorted; angular to subangular; brown 

(10YR 4/3).

270 Clayey gravelly sand (gmS); medium to very coarse sand 

with granules to small pebbles and clay; moderately to 

poorly sorted; angular to subangular; light olive brown 

(2.5Y 5/3); calcareous.

280 Silty clayey gravelly sand (gmS); medium to very 

coarse sand with granules, clay, and silt; very poorly 

sorted; angular to subangular; olive (5Y 4/3); slightly 

calcareous.

290 Silty clayey gravelly sand (gmS); medium to very 

coarse sand with granules, clay, and silt; very poorly 

sorted; angular to subangular; olive (5Y 4/3); slightly 

calcareous.

300 Sandy gravelly clayey silt (gM); silt with clay, granules, 

medium to very coarse sand, and trace small pebbles; 

very poorly sorted; light olive brown (2.5Y 5/4); 

calcareous; slightly micaceous.

310 Silty gravelly clayey sand (gmS); medium to very coarse 

sand with clay, granules, and silt; very poorly sorted; 

angular to subangular; light olive brown (2.5Y 5/4); 

slightly calcareous; slightly micaceous.

Depth 

(feet) Description

310

Washed

Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

very angular to angular; yellowish brown (10YR 5/4); 

abundant microcrystalline quartz.

320 Sandy clayey silt (sM); silt with clay and medium to very 

coarse sand; poorly sorted; olive (5Y 5/3); slightly 

calcareous.

330 Silty clayey sand (mS); medium to very coarse sand with 

silt, clay, and trace granules to small pebbles; poorly 

sorted; angular to subangular; olive (5Y 4/3).

340 Silty gravelly sand (gmS); medium to very coarse sand 

with granules to small pebbles and silt; poorly sorted; 

angular to subangular; olive brown (2.5Y 4/3); slightly 

micaceous.

350 Silty gravelly sand (gmS); medium to very coarse sand 

with granules to small pebbles and silt; poorly sorted; 

angular to subrounded; olive brown (2.5Y 4/4); 

micaceous.

360 Silty gravelly sand (gmS); coarse to very coarse sand 

with granules to small pebbles and silt; poorly sorted; 

angular to subangular; olive brown (2.5Y 4/4); 

calcareous; micaceous.

370 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles and trace silt; moderately to 

poorly sorted; angular to subangular; light olive brown 

(2.5Y 5/3); abundant quartz.

370

Washed

Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately 

sorted; very angular to subangular; yellowish 

brown (10YR 5/4); slightly calcareous; abundant 

microcrystalline quartz.
60 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 60 No sample collected; cored interval.

60 80 Clay (C); clay with trace very fine to medium sand; 

well to moderately sorted; brown (7.5YR 5/4); 

calcareous.

80 100 Clay (C); clay with trace very fine to medium sand; 

well to moderately sorted; brown (7.5YR 5/3); 

calcareous.

100 120 Clay (C); clay with trace very fine to medium sand; 

well to moderately sorted; brown (7.5YR 5/3); 

slightly calcareous.

120 140 Clay (C); clay with trace very fine to medium sand; 

well to moderately sorted; brown (7.5YR 5/4); 

slightly calcareous.

140 160 Clay (C); clay with trace very fine to medium sand; 

well to moderately sorted; brown (7.5YR 5/3); 

calcareous.

160 180 Silty sand (zS); very fine to medium sand with silt; 

well to moderately sorted; angular to subangular; 

dark yellowish brown (10YR 4/4); calcareous.

180 200 Slightly gravelly silty sand ((g)mS); fine to coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4); slightly calcareous.

200 220 Clayey silty sand (mS); fine to coarse sand with silt 

and clay; moderately to poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4); 

slightly calcareous.

220 240 Silty sand (zS); fine to coarse sand with silt; well to 

moderately sorted; angular to subangular; brown 

(10YR 4/3); slightly calcareous.

Depth

(feet) Description

From To

240 260 Slightly gravelly silty sand ((g)mS); medium to 

very coarse sand with silt and granules to small 

pebbles; moderately to poorly sorted; subangular to 

subrounded; brown (10YR 4/3); calcareous.

260 280 Sand (S); medium to very coarse sand with trace 

granules, silt and trace fine sand; moderately to 

poorly sorted; subangular to subrounded; dark 

grayish brown (2.5Y 4/2); slightly calcareous; 

micaceous.

280 300 Silty sand (zS); medium to very coarse sand with silt, 

trace granules and trace fine sand; poorly sorted; 

subangular to subrounded; very dark grayish brown 

(2.5Y 3/2); micaceous.

300 320 Silty sand (zS); fine to coarse sand with silt and trace 

granules to small pebbles; moderately to poorly 

sorted; subangular to subrounded; very dark grayish 

brown (2.5Y 3/2); micaceous.

320 340 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; very dark grayish brown 

(2.5Y 3/2); calcareous; micaceous.

340 360 Slightly gravelly silty sand ((g)mS); medium to very 

coarse sand with silt and granules to medium 

pebbles; moderately to poorly sorted; angular to 

subangular; olive brown (2.5Y 4/3); calcareous; 

micaceous.

360 370 Slightly gravelly silty sand ((g)mS); medium to very 

coarse sand with silt and granules to small pebbles; 

moderately to poorly sorted; angular to subangular; 

olive brown (2.5Y 4/3).

Table 6B. Lithologic SIEVE log for multiple-well monitoring site BLA5 (14N/03E-26K1S, -26K2S, -26K3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 2,345 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 19, 2011. Total depth drilled, 

370 feet. Screened intervals, 320–340, 190–210, and 190–210 feet.]
Tables 61

Depth 

(feet) Description

10 Sandy gravel (sG); medium to very large pebbles with 

medium to very coarse sand; moderately sorted; very 

angular to angular; dark brown (10YR 3/3); slightly 

calcareous.

20 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; moderately sorted; 

angular to subangular; dark brown (10YR 3/3); slightly 

calcareous.

30 Silty sandy gravel (msG); granules to large pebbles 

with medium to very coarse sand and silt; poorly 

sorted; very angular to angular; dark yellowish brown 

(10YR 3/4).

40 Sandy gravel (sG); small to large pebbles with trace very 

large pebbles and cobbles and medium to very coarse 

sand; poorly sorted; subangular to subrounded; dark 

yellowish brown (10YR 3/4).

50 Sandy gravel (sG); granules to medium pebbles with 

trace very large pebbles and medium to very coarse 

sand; moderately to poorly sorted; subangular to 

subrounded; very dark brown (10YR 2/2).

60 Silty sandy gravel (msG); small to large pebbles and 

medium to very coarse sand with silt; moderately to 

poorly sorted; very angular to subangular; dark brown 

(10YR 3/3).

70 Silty gravelly sand (gmS); medium to very coarse sand 

and granules to medium pebbles with silt; moderately 

to poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4).

80 Silty gravelly sand (gmS); medium to very coarse sand 

and granules to medium pebbles with silt; moderately 

to poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/6).

90 Silty gravelly sand (gmS); medium to very coarse sand 

and granules to medium pebbles with silt; moderately 

to poorly sorted; angular to subrounded; brown 

(7.5YR 4/4).

100 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to medium pebbles, and trace large 

pebbles; poorly sorted; subangular to subrounded; 

strong brown (7.5YR 4/6).

110 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; subangular to subrounded; brown (7.5YR 5/4).

Depth 

(feet) Description

120 Gravelly silty sand (gmS); medium to very coarse sand 

with granules to medium pebbles and silt; poorly 

sorted; very angular to subangular; brown (7.5YR 4/4).

130 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; very angular to subangular; brown (7.5YR 5/3).

140 Gravelly clayey sand (gmS); medium to very coarse sand 

with clay and granules to medium pebbles; moderately 

to poorly sorted; angular to subangular; brown 

(7.5YR 5/3).

150 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to medium pebbles, and trace large 

pebbles; poorly sorted; subangular to subrounded; 

brown (7.5YR 4/3).

160 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (7.5YR 5/3).

170 Gravelly clayey sand (gmS); medium to very coarse sand 

with clay and granules to medium pebbles; poorly 

to very poorly sorted; angular to subangular; brown 

(7.5YR 5/3).

180 Gravelly clayey sand (gmS); medium to very coarse sand 

with clay and granules to medium pebbles; moderately 

to poorly sorted; angular to subangular; brown 

(7.5YR 5/3).

190 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subrounded; brown (7.5YR 5/3).

200 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (7.5YR 5/3).

203 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (7.5YR 5/3).

1C bottom

210 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

subangular to subrounded; brown (7.5YR 4/3).

220 Silty gravelly sand (gmS); medium to very coarse sand 

with silt, granules to small pebbles, and trace medium 

pebbles; poorly sorted; angular to subangular; brown 

(7.5YR 5/3).

Table 7A. Lithologic SHAKER log for multiple-well monitoring site GOLD1 (15N/01E-28R1S, -28R2S, -28R3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,058 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 30, 2011. Total depth drilled, 

684 feet. Screened intervals, 650–670, 560–580, and 350–370 feet.]
62 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

230 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to small pebbles, and trace medium 

pebbles; poorly sorted; subangular to subrounded; 

brown (7.5YR 4/2).

240 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately to poorly sorted; 

subangular to subrounded; brown (7.5YR 4/2).

250 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules, and trace small pebbles; poorly 

sorted; very angular to subangular; brown (7.5YR 4/2).

260 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

subangular to angular; brown (7.5YR 4/2).

270 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; subangular 

to subrounded; brown (7.5YR 4/2).

280 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; subangular 

to subrounded; brown (7.5YR 4/2).

290 Silty sand (zS); medium to very coarse sand with silt and 

trace granules to small pebbles; moderately to poorly 

sorted; angular to subangular; brown (7.5YR 5/2).

300 Silty sand (zS); medium to very coarse sand with silt and 

trace granules to small pebbles; moderately to poorly 

sorted; angular to subangular; brown (7.5YR 4/2).

310 Silty sand (zS); medium to very coarse sand with silt and 

trace granules to small pebbles; moderately to poorly 

sorted; angular to subangular; brown (7.5YR 4/2).

320 Silty sand (zS); medium to very coarse sand with silt and 

trace granules to small pebbles; moderately to poorly 

sorted; angular to subangular; brown (7.5YR 4/2).

330 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; brown (7.5YR 4/2).

340 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark gray (7.5YR 4/1).

350 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark gray (7.5YR 4/1).

360 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; very 

angular to angular; brown (7.5YR 4/2).

Depth 

(feet) Description

370 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark gray (7.5YR 4/1). 

380 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; grayish brown (10YR 5/2).

390 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; very angular to angular; dark grayish brown 

(10YR 4/2).

400 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 4/3).

410 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

420 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; dark grayish brown (10YR 4/2).

430 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; dark grayish brown (10YR 4/2).

440 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and trace granules; poorly sorted; angular to 

subangular; dark grayish brown (10YR 4/2).

450 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2).

460 Clayey silty sand (mS); medium to very coarse sand 

with silt, clay, and trace granules; very poorly sorted; 

angular to subangular; brown (10YR 5/3).

470 Silty sand (zS); medium to very coarse sand with silt and 

trace granules to small pebbles; moderately to poorly 

sorted; subangular to subrounded; grayish brown 

(10YR 5/2).

480 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

490 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark grayish brown (10YR 4/2).

Table 7A. Lithologic SHAKER log for multiple-well monitoring site GOLD1 (15N/01E-28R1S, -28R2S, -28R3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,058 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 30, 2011. Total depth drilled, 

684 feet. Screened intervals, 650–670, 560–580, and 350–370 feet.]
Tables 63

Depth 

(feet) Description

500 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately 

to poorly sorted; subangular to subrounded; brown 

(10YR 5/3).

503 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

2C bottom

510 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

520 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

530 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; poorly sorted; angular to 

subangular; brown (10YR 4/3).

540 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(10YR 4/3).

550 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules, and trace small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3).

560 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; dark grayish brown (10YR 4/2).

570 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; dark grayish brown (10YR 4/2).

580 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 4/3).

590 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subrounded; dark yellowish brown 

(10YR 4/4).

Table 7A. Lithologic SHAKER log for multiple-well monitoring site GOLD1 (15N/01E-28R1S, -28R2S, -28R3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,058 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 30, 2011. Total depth drilled, 

684 feet. Screened intervals, 650–670, 560–580, and 350–370 feet.]

Depth 

(feet) Description

600 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

610 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately to well sorted; 

angular to very angular; very dark gray (7.5YR 3/1); 

basalt.

620 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately to well sorted; 

angular to very angular; dark brown (7.5YR 3/2); 

basalt.

630 Gravelly sand (gS); coarse to very coarse sand 

with granules to medium pebbles; moderately to 

well sorted; angular to very angular; dark brown 

(10YR 3/3); basalt.

640 Sandy gravel (sG); granules to large pebbles with coarse 

to very coarse sand; moderately to well sorted; very 

angular to angular; very dark gray (7.5YR 3/1); basalt.

650 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; moderately to poorly 

sorted; angular to very angular; dark brown 

(7.5YR 3/2); basalt.

660 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; moderately 

to poorly sorted; angular to very angular; dark brown 

(7.5YR 3/2); basalt.

670 Sandy gravel (sG); granules to medium pebbles with 

trace large pebbles and coarse to very coarse sand; 

moderately to well sorted; angular to very angular; 

very dark gray (7.5YR 3/1); basalt.

680 Sandy gravel (sG); granules to medium pebbles with 

trace large pebbles and very coarse sand; moderately 

to well sorted; very angular to angular; brown 

(7.5YR 4/3); basalt.

680 Basalt; fractured aphanitic basalt; very dark gray 

3C top (7.5YR 3/1).

684 Basalt; fractured aphanitic basalt with minor vesicules; 

3C bottom dark brown (7.5YR 3/2); heavily oxidized.
64 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 20 Gravelly sand (gS); fine to coarse sand with granules 

to large pebbles; poorly sorted; angular to 

subrounded; dark yellowish brown (10YR 3/4); 

slightly calcareous.

20 40 Gravelly sand (gS); fine to coarse sand with granules 

to large pebbles; poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 3/4); 

slightly calcareous.

40 60 Gravelly sand (gS); medium to very coarse sand with 

granules to large pebbles; moderately to poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 3/4).

60 80 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles and trace large 

pebbles; moderately to poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4).

80 100 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles; moderately to 

poorly sorted; subangular to subrounded; brown 

(7.5YR 4/4).

100 120 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles and trace large 

pebbles; moderately to poorly sorted; subangular to 

subrounded; brown (7.5YR 4/4).

120 140 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles; moderately to 

poorly sorted; subangular to subrounded; brown 

(7.5YR 4/3).

140 160 Silty sand (zS); medium to very coarse sand with silt; 

moderately sorted; subangular to subrounded; dark 

yellowish brown (10YR 4/4).

Depth

(feet) Description

From To

160 180 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately to poorly 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 3/4).

180 200 Gravelly silty sand (gmS); medium to very coarse 

sand with silt, granules to medium pebbles, and 

trace large pebbles; poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4).

200 220 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to medium pebbles; poorly sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 4/4).

220 240 Gravelly sand (gS); medium to very coarse sand 

with granules to medium pebbles and trace large 

pebbles; moderately to poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4).

240 260 Gravelly sand (gS); fine to coarse sand with granules 

to medium pebbles and trace large pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3).

260 280 Gravelly sand (gS); fine to coarse sand with granules 

to small pebbles; poorly sorted; subangular to 

subrounded; dark brown (7.5YR 3/2).

280 300 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately to poorly 

sorted; angular to subangular; brown (7.5YR 4/2).

300 320 Sand (S); medium to very coarse sand with trace 

granules and trace fine sand; moderately to well 

sorted; subangular to subrounded; dark brown 

(7.5YR 3/2).

320 340 Gravelly sand (gS); medium to very coarse sand with 

granules and trace small pebbles; moderately sorted; 

angular to subangular; very dark grayish brown 

(10YR 3/2).

Table 7B. Lithologic SIEVE log for multiple-well monitoring site GOLD1 (15N/01E-28R1S, -28R2S, -28R3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,058 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 30, 2011. Total depth drilled, 

684 feet. Screened intervals, 650–670, 560–580, and 350–370 feet.]
Tables 65

Depth

(feet) Description

From To

340 360 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately 

sorted; angular to subangular; very dark grayish 

brown (10YR 3/2).

360 380 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles and trace medium 

pebbles; moderately to poorly sorted; angular to 

subangular; very dark grayish brown (10YR 3/2).

380 400 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately to poorly 

sorted; angular to subangular; very dark grayish 

brown (10YR 3/2).

400 420 Sand (S); fine to coarse sand with trace granules; 

moderately to well sorted; subangular to 

subrounded; very dark grayish brown (10YR 3/2).

420 440 Sand (S); fine to coarse sand with trace granules 

to small pebbles; moderately to well sorted; 

subangular to subrounded; very dark grayish brown 

(10YR 3/2).

440 460 Sand (S); fine to coarse sand; well sorted; subangular 

to subrounded; dark brown (7.5YR 3/2).

460 480 Sand (S); fine to coarse sand; well sorted; subangular 

to subrounded; dark grayish brown (10YR 4/2).

480 500 Slightly gravelly sand ((g)S); fine to coarse sand with 

minor granules and trace silt; moderately sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2).

500 520 Slightly gravelly sand ((g)S); medium to very coarse 

sand and minor granules with trace silt; moderately 

sorted; subangular to subrounded; dark grayish 

brown (10YR 4/2).

Table 7B. Lithologic SIEVE log for multiple-well monitoring site GOLD1 (15N/01E-28R1S, -28R2S, -28R3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,058 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, June 30, 2011. Total depth drilled, 

684 feet. Screened intervals, 650–670, 560–580, and 350–370 feet.]

Depth

(feet) Description

From To

520 540 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2).

540 560 Slightly gravelly sand ((g)S); medium to very coarse 

sand with minor granules and trace silt; moderately 

sorted; subangular to subrounded; dark grayish 

brown (10YR 4/2).

560 580 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

subangular to subrounded; dark grayish brown 

(10YR 4/2).

580 600 Gravelly sand (gS); fine to coarse sand with granules 

to small pebbles; moderately sorted; subangular to 

subrounded; brown (10YR 4/3).

600 620 Gravelly sand (gS); medium to very coarse sand 

with granules and trace silt; moderately sorted; 

subangular to subrounded; dark brown (7.5YR 3/2); 

basalt.

620 640 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subangular to subrounded; dark reddish brown 

(5YR 3/2); basalt.

640 660 Sand (S); fine to coarse sand; well sorted; angular to 

subangular; dark brown (7.5YR 3/2); basalt.

660 680 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; very dark gray (10YR 3/1); 

basalt.

680 684 No sample collected; cored interval.
66 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

10 Gravel (G); granules to medium pebbles; moderately 

sorted; subangular to angular; dark brown (7.5YR 3/3).

20 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subangular to angular; very dark brown (7.5YR 2.5/2).

30 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subangular to angular; dark brown (7.5YR 3/3).

40 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; angular 

to subrounded; very dark brown (7.5YR 2.5/2).

50 Sandy gravel (sG); granules to medium pebbles with very 

coarse sand; moderately sorted; subrounded to angular; 

dark brown (7.5YR 3/3).

60 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subangular to subrounded; very dark brown 

(7.5YR 2.5/2).

70 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; angular 

to subrounded; dark brown (7.5YR 3/3).

80 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subrounded to angular; brown (7.5YR 4/4).

90 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; dark brown (7.5YR 3/3).

100 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; brown (7.5YR 4/4).

110 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subrounded to angular; brown (7.5YR 4/4).

120 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subrounded to angular; dark brown (7.5YR 3/4).

130 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subrounded to angular; dark brown (7.5YR 3/4).

140 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; subrounded to 

angular; brown (7.5YR 4/4).

150 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; brown (7.5YR 4/4).

Depth 

(feet) Description

160 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; brown (7.5YR 4/4).

170 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand; moderately sorted; 

subrounded to subangular; brown (7.5YR 4/4).

180 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; brown (7.5YR 4/4).

190 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; dark brown (7.5YR 3/4).

200 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subangular to angular; dark brown (7.5YR 3/4).

210 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace very fine to 

fine sand; moderately to poorly sorted; subangular to 

angular; brown (7.5YR 4/3).

220 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace fine to very 

fine sand; moderately to poorly sorted; subangular to 

angular; brown (7.5YR 4/3).

230 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace fine to very 

fine sand; moderately to poorly sorted; subrounded to 

angular; brown (7.5YR 5/3).

240 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace fine sand; 

moderately to poorly sorted; subangular to angular; 

brown (7.5YR 4/3).

250 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace fine to very 

fine sand; moderately to poorly sorted; angular to 

subangular; brown (7.5YR 4/3); trace light yellow, 

4–22 mm, brittle gravel with waxy luster.

260 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; subrounded to angular; brown 

(7.5YR 4/2); trace light yellow, 3–8 mm, brittle gravel 

with waxy luster.

270 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; subrounded to angular; brown 

(10YR 4/3).

Table 8A. Lithologic SHAKER log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,064 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 5, 2012. Total depth drilled, 

700 feet. Screened intervals, 620–680, 300–420, and 260–280 feet. Abbreviation: mm, millimeter]
Tables 67

Depth 

(feet) Description

280 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subrounded to subangular; dark 

yellowish brown (10YR 4/4); trace light yellow, 

3–8 mm, brittle gravel with waxy luster.

290 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; brown 

(10YR 4/3); trace light yellow, 1–3 mm, brittle gravel 

with waxy luster.

300 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace silt; moderately 

to poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

310 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; brown 

(10YR 4/3); trace light yellow, 4–22 mm, brittle gravel 

with waxy luster.

320 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately to poorly 

sorted; subangular to angular; brown (10YR 4/3); trace 

light yellow, 3–7 mm, brittle gravel with waxy luster.

330 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; angular to subangular; brown 

(10YR 4/3).

340 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

angular to subangular; dark brown (7.5YR 3/3).

345 Gravel (G); large pebbles; very well sorted; subangular to 

1C shoe angular; dark reddish brown (5YR 3/4).

350 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; dark grayish 

brown (10YR 4/2).

360 Gravelly silty sand (gmS); medium to very coarse sand 

with granules to medium pebbles and silt; moderately 

to poorly sorted; subangular to angular; brown 

(10YR 5/3).

370 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subrounded to angular; dark grayish 

brown (10YR 4/2).

Depth 

(feet) Description

380 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; moderately 

to poorly sorted; subangular to angular; brown 

(10YR 5/3).

390 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; dark grayish 

brown (10YR 4/2).

400 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; very dark 

grayish brown (10YR 3/2).

410 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; 

subangular to angular; dark grayish brown (10YR 4/2).

420 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately to 

poorly sorted; subangular to angular; reddish brown 

(5YR 4/4).

430 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace silt; moderately 

to poorly sorted; subrounded to subangular; dark 

grayish brown (10YR 4/2).

440 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subrounded to angular; dark grayish brown 

(10YR 4/2).

450 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

subrounded to angular; very dark grayish brown 

(10YR 3/2).

460 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately sorted; subrounded to 

subangular; dark grayish brown (10YR 4/2).

470 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

subrounded to subangular; dark grayish brown 

(10YR 4/2).

480 Gravelly sand (gS); medium to very coarse sand and 

granules; moderately to well sorted; subrounded to 

subangular; dark grayish brown (10YR 4/2).

490 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; subangular to angular; dark grayish 

brown (10YR 4/2).

Table 8A. Lithologic SHAKER log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,064 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 5, 2012. Total depth drilled, 

700 feet. Screened intervals, 620–680, 300–420, and 260–280 feet. Abbreviation: mm, millimeter]
68 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

500 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subrounded to angular; brown (10YR 4/3).

510 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately to 

poorly sorted; subangular to angular; light olive brown 

(2.5Y 5/3).

520 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; subangular to angular; light olive 

brown (2.5Y 5/3).

530 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand; moderately sorted; 

subangular to angular; brown (10YR 4/3).

540 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; subangular to angular; light olive 

brown (2.5Y 5/3).

550 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately 

to poorly sorted; angular to subangular; brown 

(10YR 4/3).

560 Sandy silty gravel (mG); granules to small pebbles with 

silt and medium to very coarse sand; moderately to 

poorly sorted; subangular to angular; dark grayish 

brown (10YR 4/2).

570 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; brown 

(10YR 4/3).

580 Gravelly sand (gS); medium to very coarse sand with 

granules and trace silt; moderately sorted; subangular 

to angular; dark grayish brown (10YR 4/2).

590 Gravelly sand (gS); medium to very coarse sand with 

granules and trace silt; moderately sorted; angular to 

subangular; brown (10YR 4/3).

600 Gravelly sand (gS); medium to very coarse sand with 

granules and trace silt; moderately sorted; angular to 

subangular; brown (10YR 4/3).

Table 8A. Lithologic SHAKER log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,064 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 5, 2012. Total depth drilled, 

700 feet. Screened intervals, 620–680, 300–420, and 260–280 feet. Abbreviation: mm, millimeter]

Depth 

(feet) Description

610 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to well sorted; 

angular to very angular; dark brown (10YR 3/3); 

basalt.

620 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to well sorted; 

angular to very angular; very dark brown (10YR 2/2); 

basalt.

630 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to well sorted; 

angular to very angular; black (7.5YR 2.5/1); basalt.

640 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to well sorted; 

angular; very dark brown (10YR 2/2); basalt.

650 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; angular to very angular; dark 

yellowish brown (10YR 3/4); basalt.

660 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; angular to very angular; dark 

yellowish brown (10YR 3/4); basalt.

670 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; angular to very angular; dark brown 

(10YR 3/3); basalt.

680 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; angular to very angular; very dark 

grayish brown (10YR 3/2); basalt.

690 Sandy silty gravel (mG); granules to medium pebbles 

with silt and medium to very coarse sand; moderately 

to poorly sorted; angular to very angular; dark 

yellowish brown (10YR 4/4); basalt.

700 Sandy silty gravel (mG); granules to medium pebbles 

with silt and medium to very coarse sand; moderately 

to poorly sorted; angular to very angular; dark 

yellowish brown (10YR 3/4); basalt.
Tables 69

Depth

(feet) Description

From To

0 20 Gravelly sand (gS); very fine to medium sand with 

granules to medium pebbles; poorly sorted; angular 

to subrounded; brown (10YR 4/3); calcareous.

20 40 Gravelly sand (gS); fine to very coarse sand with 

granules to medium pebbles; poorly sorted; very 

angular to subangular; brown (10YR 4/3); slightly 

calcareous.

40 60 Sandy gravel (sG); granules to medium pebbles with 

fine to very coarse sand; poorly sorted; angular to 

subangular; brown (10YR 4/3); slightly calcareous.

60 80 Sand (S); very fine to medium sand with trace granules 

to small pebbles; moderately to well sorted; angular 

to subrounded; dark yellowish brown (10YR 4/4).

80 100 Gravelly sand (gS); very fine to coarse sand with 

granules to medium pebbles; poorly sorted; 

subangular to rounded; brown (10YR 4/3).

100 120 Gravelly sand (gS); very fine to very coarse sand 

with granules to medium pebbles; poorly sorted; 

subangular to rounded; brown (10YR 4/3).

120 140 Gravelly sand (gS); very fine to coarse sand with 

granules to medium pebbles; poorly sorted; angular 

to rounded; brown (10YR 4/3).

140 160 Gravelly sand (gS); fine to medium sand with granules 

to medium pebbles; poorly sorted; angular to 

subrounded; yellowish brown (10YR 5/4).

160 180 Gravelly sand (gS); very fine to coarse sand with 

granules to medium pebbles; poorly sorted; 

angular to subrounded; brown (10YR 5/3); slightly 

calcareous.

180 200 Gravelly silty sand (gmS); very fine to coarse sand 

with silt and granules to small pebbles; poorly 

sorted; angular to subrounded; brown (10YR 4/3).

200 220 Gravelly sand (gS); very fine to coarse sand with 

granules to medium pebbles; poorly sorted; angular 

to subangular; brown (10YR 5/3).

Depth

(feet) Description

From To

220 240 Gravelly sand (gS); very fine to very coarse sand with 

granules to medium pebbles; poorly sorted; angular 

to subangular; brown (10YR 4/3).

240 260 Gravelly sand (gS); very fine to very coarse sand with 

granules to medium pebbles; poorly sorted; angular 

to subangular; brown (7.5YR 5/2); waxy bentonite 

fragments (1–4 mm); altered ash?

260 280 Gravelly sand (gS); very fine to very coarse sand with 

granules to medium pebbles; poorly sorted; angular 

to subrounded; brown (10YR 4/3).

280 300 Gravelly sand (gS); very fine to very coarse sand with 

granules to small pebbles; poorly sorted; angular 

to subangular; brown (10YR 4/3); trace waxy 

bentonite (3–4 mm); altered ash?

300 320 Gravelly sand (gS); very fine to coarse sand with 

granules to medium pebbles and minor silt; very 

poorly sorted; angular to subrounded; dark grayish 

brown (10YR 4/2); slightly calcareous; minor waxy 

bentonite (1–20 mm); volcanic (dacite).

320 340 Gravelly sand (gS); very fine to coarse sand with 

granules to medium pebbles; very poorly sorted; 

angular to subrounded; brown (7.5YR 4/2); volcanic 

(dacite).

340 345 No sample collected; cored interval.

345 360 Gravelly sand (gS); very fine to very coarse sand 

with granules to medium pebbles and minor silt; 

very poorly sorted; angular to subangular; black 

(7.5YR 2.5/1); volcanic (dacite).

360 380 Gravelly sand (gS); very fine to coarse sand with 

granules to small pebbles and minor silt; poorly 

sorted; angular to subangular; dark grayish brown 

(10YR 4/2); volcanic (dacite).

Table 8B. Lithologic SIEVE log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,064 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 5, 2012. Total depth drilled, 

700 feet. Screened intervals, 620–680, 300–420, and 260–280 feet. Abbreviation: mm, millimeter]
70 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

380 400 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand and trace clay; very 

poorly sorted; angular to subangular; dark grayish 

brown (10YR 4/2); minor biotite; volcanic (dacite).

400 420 Sandy gravel (sG); granules to medium pebbles 

with very fine to very coarse sand; very poorly 

sorted; angular to subrounded; dark grayish brown 

(10YR 4/2); slightly calcareous; minor biotite.

420 440 Sandy gravel (sG); granules to medium pebbles 

with very fine to very coarse sand; very poorly 

sorted; angular to subrounded; dark grayish brown 

(10YR 4/2); slightly calcareous; minor biotite.

440 460 Gravelly sand (gS); very fine to very coarse sand with 

granules to medium pebbles; very poorly sorted; 

angular to rounded; dark grayish brown (10YR 4/2); 

minor biotite.

460 480 Slightly gravelly sand ((g)S); very fine to very coarse 

sand with granules to medium pebbles; moderately 

to poorly sorted; subangular to rounded; dark 

grayish brown (10YR 4/2).

480 500 Slightly gravelly sand ((g)S); very fine to very coarse 

sand with granules to small pebbles; moderately to 

poorly sorted; subangular to rounded; dark grayish 

brown (10YR 4/2).

500 520 Gravelly sand (gS); fine to very coarse sand with 

granules to small pebbles; poorly sorted; subangular 

to rounded; brown (10YR 4/3).

520 540 Sandy gravel (sG); granules to medium pebbles with 

fine to very coarse sand; poorly sorted; subangular 

to rounded; dark grayish brown (10YR 4/2).

540 560 Slightly gravelly sand ((g)S); very fine to medium 

sand with minor coarse to very coarse sand and 

granules to medium pebbles; moderately to poorly 

sorted; angular to subangular; dark grayish brown 

(10YR 4/2).

Depth

(feet) Description

From To

560 580 Sand (S); very fine to medium sand with trace granules 

to small pebbles; moderately to well sorted; 

angular to subrounded; brown (10YR 4/3); slightly 

calcareous.

580 600 Gravelly sand (gS); fine to very coarse sand with 

granules to small pebbles; poorly sorted; angular to 

subrounded; dark grayish brown (10YR 4/2).

600 620 Sandy gravel (sG); granules to medium pebbles 

with coarse to very coarse sand; moderately to 

poorly sorted; angular to subrounded; dark grayish 

brown (10YR 4/2); angular to subrounded basalt 

fragments; weathered mafic bedrock.

620 640 Sandy gravel (sG); granules to medium pebbles with 

fine to very coarse sand; poorly sorted; very angular 

to subangular; black (10YR 2/1); angular basalt 

fragments; bedrock.

640 660 Sandy gravel (sG); granules to medium pebbles with 

fine to very coarse sand; poorly sorted; very angular 

to angular; very dark grayish brown (10YR 3/2); 

angular basalt fragments; bedrock.

660 680 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand; very poorly sorted; 

very angular to angular; very dark grayish brown 

(10YR 3/2); angular basalt fragments; bedrock.

680 700 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand; very poorly sorted; 

very angular to subangular; dark grayish brown 

(10YR 4/2); angular basalt fragments; bedrock.

Table 8B. Lithologic SIEVE log for test well GOLD1-T (15N/01E-28R4S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,064 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, March 5, 2012. Total depth drilled, 

700 feet. Screened intervals, 620–680, 300–420, and 260–280 feet. Abbreviation: mm, millimeter]
Tables 71

Depth 

(feet) Description

10 Gravel (G); granules to large pebbles; poorly sorted; 

subangular to very angular; very dark brown 

(7.5YR 2.5/2); slightly calcareous.

20 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; poorly sorted; subangular 

to angular; dark brown (7.5YR 3/2).

30 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; poorly sorted; subangular 

to angular; dark grayish brown (10YR 4/2).

40 Sandy gravel (sG); granules to medium pebbles with very 

coarse to medium sand and trace silt; poorly sorted; 

angular to subangular; brown (10YR 5/3).

50 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; poorly to very 

poorly sorted; subangular to angular; yellowish brown 

(10YR 5/4).

60 Sandy gravel (sG); granules to medium pebbles with 

very coarse to coarse sand and trace silt; poorly sorted; 

subangular to angular; brown (10YR 5/3).

70 Silty sandy gravel (msG); granules to small pebbles with 

coarse to very coarse sand and silt; poorly to very 

poorly sorted; subangular to angular; yellowish brown 

(10YR 5/4).

80 Silty sandy gravel (msG); granules to small pebbles with 

very coarse to medium sand and silt; poorly to very 

poorly sorted; subangular to angular; yellowish brown 

(10YR 5/4).

90 Silty sandy gravel (msG); granules to small pebbles with 

medium to very coarse sand and silt; poorly to very 

poorly sorted; angular to subrounded; yellowish brown 

(10YR 5/4).

100 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and silt; poorly to 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

110 Sandy gravel (sG); small to large pebbles with coarse 

to very coarse sand; poorly sorted; subrounded to 

angular; brown (10YR 4/3).

120 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand and trace silt; poorly sorted; 

subrounded to angular; brown (10YR 4/3).

130 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and silt; poorly to 

very poorly sorted; subangular to angular; brown 

(10YR 4/3).

Depth 

(feet) Description

140 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and silt; poorly to 

very poorly sorted; subangular to angular; brown 

(10YR 4/3).

150 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand and trace silt; poorly sorted; 

subangular to angular; brown (10YR 4/3).

160 Silty sandy gravel (msG); granules to small pebbles with 

medium to very coarse sand and silt; poorly sorted; 

subangular to angular; yellowish brown (10YR 5/4).

170 Silty sandy gravel (msG); granules to small pebbles with 

medium to very coarse sand and silt; poorly to very 

poorly sorted; subangular to angular; yellowish brown 

(10YR 5/4).

180 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly to 

very poorly sorted; subangular to angular; brown 

(10YR 4/3).

190 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; poorly sorted; angular to 

subangular; dark grayish brown (10YR 4/2).

200 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly to 

very poorly sorted; subangular to angular; yellowish 

brown (10YR 5/4).

210 Silty sandy gravel (msG); granules to small pebbles with 

medium to very coarse sand, silt, and trace clay; very 

poorly sorted; subangular to angular; yellowish brown 

(10YR 5/4).

220 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; subangular to angular; brown 

(10YR 4/3).

230 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4).

240 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 4/3).

250 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; subrounded to angular; 

yellowish brown (10YR 5/4).

Table 9A. Lithologic SHAKER log for test well NELT6 (15N/02E-05N1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,139 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2012. Total depth drilled, 

903 feet. Screened intervals, 760–840, 500–560, and 400–460 feet.]
72 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

260 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

270 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

280 Gravel (G); small to large pebbles; very well sorted; 

angular to very angular; very dark gray (10YR 3/1).

280 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand and trace clay; poorly 

sorted; angular to subangular; brown (10YR 5/3).

1C top

290 Clayey sandy gravel (msG); granules to small pebbles 

with coarse to very coarse sand and clay; poorly to 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

300 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and clay; poorly 

to very poorly sorted; subangular to angular; brown 

(10YR 5/3).

310 Clayey sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and clay; poorly to 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

320 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; subangular to angular; brown 

(10YR 5/3).

330 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; subangular to angular; brown 

(10YR 5/3).

340 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

350 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

360 Gravelly silty sand (gmS); very coarse to medium sand 

with silt, granules to small pebbles, and trace clay; 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

Depth 

(feet) Description

370 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand, silt, and trace clay; 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

380 Gravel (G); granules to medium pebbles; very well 

sorted; angular to very angular; very dark grayish 

brown (10YR 3/2).

390 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly to 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

400 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

410 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

420 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand, trace silt, and trace clay; 

moderately to poorly sorted; angular to subangular; 

brown (10YR 5/3).

430 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

440 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

450 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

460 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand, clay, and trace silt; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

470 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, clay, and trace silt; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

Table 9A. Lithologic SHAKER log for test well NELT6 (15N/02E-05N1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,139 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2012. Total depth drilled, 

903 feet. Screened intervals, 760–840, 500–560, and 400–460 feet.]
Tables 73

Depth 

(feet) Description

480 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay, granules to small pebbles, and trace 

silt; very poorly sorted; angular to subangular; brown 

(7.5YR 5/3).

490 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; moderately to poorly sorted; 

angular to subangular; brown (10YR 4/3).

500 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 4/3).

510 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

520 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 4/3).

530 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(10YR 4/3).

540 Clayey silty sandy gravel (msG); granules to medium 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 4/3).

550 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

560 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

560 Sandy gravel (sG); medium to large pebbles with 

medium to very coarse sand; moderately to poorly 

sorted; subrounded to subangular; very dark grayish 

brown (10YR 3/2).

2C top

563 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to poorly 

sorted; angular to very angular; very dark gray 

(10YR 3/1).

 2C bottom

Depth 

(feet) Description

570 Silty sandy gravel (msG); granules to small pebbles 

with coarse to very coarse sand, silt, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

580 Silty sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand, silt, and trace clay; 

very poorly sorted; subangular to angular; brown 

(10YR 5/3).

590 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand and trace silt; moderately 

to poorly sorted; angular to subangular; brown 

(10YR 4/3).

600 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand and trace clay; moderately 

to poorly sorted; angular to subangular; brown 

(10YR 5/3).

610 Silty sandy gravel (msG); granules to small pebbles with 

coarse to very coarse sand and silt; very poorly sorted; 

angular to subangular; brown (10YR 4/3).

620 Clayey silty sandy gravel (msG); granules to medium 

pebbles with coarse to very coarse sand, silt, and clay; 

very poorly sorted; angular to subangular; brown 

(10YR 4/3).

630 Clayey silty sandy gravel (msG); granules to small 

pebbles with coarse to very coarse sand, silt, and clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

640 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

650 Clayey silty sandy gravel (msG); granules to small 

pebbles with coarse to very coarse sand, silt, and clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

660 Clayey silty sandy gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

670 Clayey silty sandy gravel (msG); granules to small 

pebbles with very coarse to medium sand, silt, and 

clay; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

Table 9A. Lithologic SHAKER log for test well NELT6 (15N/02E-05N1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,139 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2012. Total depth drilled, 

903 feet. Screened intervals, 760–840, 500–560, and 400–460 feet.]
74 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

680 Silty sandy clayey gravel (msG); granules to small 

pebbles with very coarse to coarse sand, clay, and 

silt; very poorly sorted; angular to subangular; brown 

(10YR 5/3).

690 Silty clayey sandy gravel (msG); granules to small 

pebbles with coarse to very coarse sand, silt, and 

clay; very poorly sorted; angular to subrounded; dark 

yellowish brown (10YR 4/4).

700 Silty sandy clayey gravel (msG); granules to small 

pebbles with medium to very coarse sand, silt, and 

clay; very poorly sorted; angular to subrounded; brown 

(10YR 5/3).

710 Silty sandy gravel (msG); granules with coarse to very 

coarse sand, silt and trace clay; poorly to very poorly 

sorted; angular to subangular; brown (10YR 5/3).

720 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to poorly 

sorted; angular to subrounded; brown (10YR 4/3).

730 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately to poorly sorted; 

angular to subangular; brown (10YR 4/3).

740 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to poorly 

sorted; angular to subrounded; brown (10YR 4/3).

750 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately to poorly sorted; 

angular to subangular; brown (10YR 4/3).

760 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately to poorly sorted; 

angular to subrounded; brown (10YR 4/3).

770 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; moderately to poorly sorted; 

angular to subangular; brown (10YR 4/3).

780 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately to poorly 

sorted; angular to subrounded; brown (10YR 4/3).

790 Silty sandy clayey gravel (msG); granules to small 

pebbles with coarse to very coarse sand, clay, and silt; 

very poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

800 Silty sandy clayey gravel (msG); granules to small 

pebbles with coarse to very coarse sand, clay, and silt; 

very poorly sorted; subrounded to angular; brown 

(10YR 4/3).

Depth 

(feet) Description

810 Silty sandy clayey gravel (msG); granules to small 

pebbles with coarse to very coarse sand, clay, and silt; 

very poorly sorted; angular to subrounded; brown 

(10YR 4/3).

820 Silty sandy gravel (msG); granules to small pebbles with 

coarse to very coarse sand, silt, and trace clay; very 

poorly sorted; angular to subrounded; dark grayish 

brown (10YR 4/2).

830 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand, trace silt, and trace clay; 

moderately to poorly sorted; angular to subrounded; 

brown (10YR 4/3).

840 Silty sandy clayey gravel (msG); granules to medium 

pebbles with coarse to very coarse sand, clay, and silt; 

very poorly sorted; angular to subrounded; brown 

(10YR 4/3).

850 Silty sandy clayey gravel (msG); granules to medium 

pebbles with coarse to very coarse sand, clay, and silt; 

very poorly sorted; angular to subrounded; brown 

(10YR 4/3).

860 Silty sandy clayey gravel (msG); granules to medium 

pebbles with coarse to very coarse sand, clay, and silt; 

very poorly sorted; subrounded to angular; brown 

(10YR 4/3).

870 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand, trace silt, and trace clay; poorly 

sorted; subrounded to angular; brown (10YR 4/3).

880 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand, trace silt, and trace clay; poorly 

sorted; subrounded to angular; brown (10YR 4/3).

890 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand, trace silt, and trace clay; poorly 

sorted; subrounded to angular; dark grayish brown 

(10YR 4/2).

900 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand, trace silt, and trace clay; poorly 

sorted; subangular to angular; brown (10YR 4/3).

900 Sandy clayey silt (sM); silt with clay, very fine to 

medium sand and trace granules; poorly sorted; brown 

(10YR 4/3); slough?

3C top

903 Silty clayey gravelly sand (gmS); very fine to medium 

sand with clay, silt, and granules to large pebbles; 

very poorly sorted; subrounded to angular; brown 

(10YR 4/3)

3C bottom

Table 9A. Lithologic SHAKER log for test well NELT6 (15N/02E-05N1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,139 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2012. Total depth drilled, 

903 feet. Screened intervals, 760–840, 500–560, and 400–460 feet.]
Tables 75

Depth

(feet) Description

From To

0 19 Sandy gravel (sG); granules to large pebbles with very 

fine to very coarse sand; very poorly sorted; angular 

to subrounded; brown (7.5YR 4/3); calcareous; plus 

cobbles?

19 40 Clayey sandy gravel (msG); granules to large pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subrounded; yellowish 

brown (10YR 5/4); calcareous; plus cobbles?

40 60 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to rounded; brown 

(10YR 5/3); calcareous.

60 80 Clayey sandy gravel (msG); granules to large pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subrounded; brown 

(10YR 5/3); plus cobbles?

80 100 Clayey sandy gravel (msG); granules to large pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subrounded; brown 

(10YR 5/3); slightly calcareous.

100 120 Clayey sandy gravel (msG); granules to large pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subrounded; brown 

(10YR 5/3); slightly calcareous.

120 140 Clayey sandy gravel (msG); granules to large pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subrounded; brown (10YR 5/3); 

calcareous.

140 160 Gravelly clayey sand (gmS); fine to very coarse sand 

with clay and granules to medium pebbles; very 

poorly sorted; angular to subrounded; yellowish 

brown (10YR 5/4); slightly calcareous.

160 180 Clayey sandy gravel (msG); granules to medium 

pebbles with fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 5/3); calcareous.

180 200 Clayey sandy gravel (msG); granules to large pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; very angular to subrounded; yellowish 

brown (10YR 5/4).

200 220 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 4/3).

220 240 Silty sandy gravel (msG); granules to medium pebbles 

with very fine to very coarse sand and silt; very 

poorly sorted; subangular to subrounded; brown 

(7.5YR 4/3).

Depth

(feet) Description

From To

240 260 Clayey silty sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and 

silt with clay; very poorly sorted; angular to 

subrounded; brown (10YR 5/3).

260 280 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 5/3).

280 300 Clayey silty sandy gravel (msG); granules to large 

pebbles with very fine to very coarse sand and 

silt with clay; very poorly sorted; angular to 

subrounded; brown (10YR 5/3).

300 320 Clayey silty sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and 

silt with clay; very poorly sorted; angular to 

subrounded; brown (10YR 5/3).

320 340 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 5/3).

340 360 Sandy clayey gravel (mG); granules to medium 

pebbles with clay and very fine to very coarse sand; 

very poorly sorted; angular to subrounded; brown 

(10YR 5/3).

360 380 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 5/3).

380 400 Sandy gravel (sG); granules to large pebbles with very 

fine to very coarse sand; very poorly sorted; very 

angular to subangular; brown (10YR 4/3).

400 420 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(7.5YR 4/2).

420 440 Sandy gravel (sG); granules to medium pebbles 

with very fine to very coarse sand and minor clay; 

very poorly sorted; angular to subrounded; brown 

(7.5YR 4/2).

440 460 Clayey silty sandy gravel (msG); granules to small 

pebbles with very fine to very coarse sand and 

silt with clay; very poorly sorted; subangular to 

subrounded; brown (7.5YR 4/2).

460 480 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; very angular to subrounded; 

brown (7.5YR 4/2).

Table 9B. Lithologic SIEVE log for test well NELT6 (15N/02E-05N1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,139 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2012. Total depth drilled, 

903 feet. Screened intervals, 760–840, 500–560, and 400–460 feet.]
76 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

480 500 Silty sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and silt; very 

poorly sorted; angular to subrounded; brown 

(7.5YR 4/2).

500 520 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(7.5YR 4/2).

520 540 Silty sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and silt; very 

poorly sorted; angular to subrounded; dark brown 

(7.5YR 3/2).

540 560 Silty sandy gravel (msG); granules to medium pebbles 

with very fine to very coarse sand and silt; very 

poorly sorted; very angular to subrounded; brown 

(7.5YR 4/2).

560 580 Silty sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and silt; very poorly 

sorted; angular to subrounded; brown (7.5YR 4/2).

580 600 Silty clayey sandy gravel (msG); granules to medium 

pebbles with fine to very coarse sand and clay with 

silt; very poorly sorted; angular to subrounded; 

brown (7.5YR 4/2).

600 620 Clayey sandy gravel (msG); granules to medium 

pebbles with fine to very coarse sand and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 4/3).

620 640 Clayey sandy gravel (msG); granules to medium 

pebbles with fine to very coarse sand and clay; very 

poorly sorted; very angular to subrounded; brown 

(10YR 4/3).

640 660 Silty clayey sandy gravel (msG); granules to small 

pebbles with very fine to very coarse sand and clay 

with silt; very poorly sorted; angular to subrounded; 

brown (7.5YR 4/2).

660 680 Clayey silty sandy gravel (msG); granules to small 

pebbles with very fine to coarse sand and silt with 

clay; very poorly sorted; subangular to rounded; 

brown (10YR 4/3).

680 700 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; subangular to rounded; brown (10YR 4/3).

Depth

(feet) Description

From To

700 720 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; subangular to rounded; brown (10YR 4/3).

720 740 Sandy gravel (sG); granules with very fine to very 

coarse sand and minor clay; poorly sorted; angular 

to rounded; brown (7.5YR 4/2).

740 760 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand and minor clay; very 

poorly sorted; very angular to subangular; dark 

grayish brown (10YR 4/2).

760 780 Slightly gravelly silty sand ((g)mS); very fine to 

very coarse sand with silt and granules; poorly to 

moderately sorted; very angular to subrounded; 

brown (10YR 4/3).

780 800 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand and minor silt; very 

poorly sorted; angular to rounded; dark grayish 

brown (10YR 4/2).

800 820 Gravelly sand (gS); very fine to very coarse sand with 

granules to small pebbles and minor clay; very 

poorly sorted; angular to subrounded; dark grayish 

brown (10YR 4/2).

820 840 Gravelly sand (gS); very fine to very coarse sand with 

granules; poorly to moderately sorted; angular to 

subrounded; dark grayish brown (10YR 4/2).

840 860 Sandy gravel (sG); granules with very fine to very 

coarse sand and minor clay; poorly to moderately 

sorted; angular to rounded; dark grayish brown 

(10YR 4/2).

860 880 Gravelly sand (gS); very fine to very coarse sand with 

granules and minor clay; poorly to moderately 

sorted; angular to rounded; very dark grayish brown 

(10YR 3/2).

880 900 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand and minor clay; very 

poorly sorted; angular to subrounded; very dark 

grayish brown (10YR 3/2); rounded mafic pebbles.

900 903 No sample collected; cored interval.

Table 9B. Lithologic SIEVE log for test well NELT6 (15N/02E-05N1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,139 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2012. Total depth drilled, 

903 feet. Screened intervals, 760–840, 500–560, and 400–460 feet.]
Tables 77

Depth 

(feet) Description

10 Sandy gravel (sG); granules to large pebbles with coarse 

to very coarse sand; moderately sorted; angular to 

subangular; dark yellowish brown (10YR 3/4).

20 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 3/4).

30 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 3/4).

40 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace silt; moderately 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 4/4).

50 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; very dark grayish brown 

(10YR 3/2).

60 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand and trace silt; moderately 

sorted; subangular to subrounded; very dark grayish 

brown (10YR 3/2).

70 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; very dark grayish brown 

(10YR 3/2).

80 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand; moderately sorted; 

subrounded to rounded; very dark grayish brown 

(10YR 3/2).

90 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; very dark grayish brown 

(10YR 3/2).

100 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately sorted; angular 

to subangular; very dark grayish brown (10YR 3/2).

110 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; brown (10YR 4/3).

120 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately sorted; angular 

to subangular; dark brown (10YR 3/3).

130 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; very dark grayish brown (10YR 3/2).

Depth 

(feet) Description

140 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; very dark grayish brown 

(10YR 3/2).

150 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subangular to subrounded; very dark grayish brown 

(10YR 3/2).

160 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; very dark grayish brown (10YR 3/2).

170 Gravelly sand (gS); granules to small pebbles with 

medium to very coarse sand and trace silt; moderately 

sorted; angular to subangular; very dark grayish brown 

(10YR 3/2).

180 Sandy gravelly silt (gM); silt with granules and medium 

to very coarse sand; poorly sorted; brown (10YR 5/3).

190 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

sorted; subangular to subrounded; dark brown 

(10YR 3/3).

200 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

sorted; angular to subangular; very dark grayish brown 

(10YR 3/2).

205 Silty sand (zS); very fine to medium sand with silt; 

moderately sorted; subangular to rounded; brown 

(10YR 4/3).

1C shoe

210 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 4/3).

220 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subrounded; brown (10YR 4/3).

230 Slightly gravelly sandy silt ((g)sM); silt with medium to 

very coarse sand and granules to small pebbles; poorly 

sorted; brown (10YR 4/3).

240 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand; well sorted; subangular to 

subrounded; very dark grayish brown (10YR 3/2).

250 Gravelly clayey silty sand (gmS); medium to very 

coarse sand with silt, clay, and granules to small 

pebbles; poorly to very poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4).

260 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly to 

very poorly sorted; angular to subangular; brown 

(10YR 4/3).

Table 10A. Lithologic SHAKER log for multiple-well monitoring site NELT2 (15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,054 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, September 6, 2011. Total depth drilled, 

840 feet. Screened intervals, 760–800, 510–530, and 280–300 feet. Washed—sample was washed to remove fine grained material and drilling mud]
78 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

270 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly to 

very poorly sorted; subangular to subrounded; dark 

yellowish brown (10YR 4/4).

280 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

to very poorly sorted; angular to subangular; dark 

yellowish brown (10YR 3/4).

290 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly to 

very poorly sorted; subangular to subrounded; brown 

(10YR 5/3).

300 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

sorted; subangular to subrounded; brown (10YR 4/3).

310 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 4/4); slightly calcareous.

320 Gravelly clayey silty sand (gmS); medium to very 

coarse sand, silt, and clay with granules to small 

pebbles; poorly to very poorly sorted; subangular to 

subrounded; brown (10YR 5/3); calcareous.

330 Gravelly silty sand (gmS); very fine to medium sand 

with silt and granules to small pebbles; poorly to 

very poorly sorted; subangular to subrounded; light 

brownish gray (10YR 6/2); calcareous.

340 Sandy clayey silt (sM); silt with clay, very fine to 

medium sand, and trace granules to small pebbles; 

poorly sorted; brown (10YR 4/3); calcareous.

344 Sandy silt (sZ); silt with very fine to medium sand and 

trace granules to small pebbles; moderately to poorly 

sorted; pale brown (10YR 6/3); calcareous.

350 Sandy silt (sZ); silt with very fine to medium sand, trace 

granules, and trace clay; moderately to poorly sorted; 

dark grayish brown (10YR 4/2); slightly calcareous.

360 Sandy silt (sZ); silt with very fine to medium sand, trace 

granules, and trace clay; moderately to poorly sorted; 

brown (10YR 5/3); calcareous.

361 Sandy silt (sZ); silt with very fine to medium sand, trace 

granules to small pebbles, and trace clay; moderately 

to poorly sorted; light gray (10YR 7/2); slightly 

calcareous; pyroclastic.

370 Gravelly silty sand (gmS); fine to coarse sand and silt 

with granules to small pebbles; poorly to very poorly 

sorted; subangular to subrounded; light brownish gray 

(10YR 6/2); calcareous; pyroclastic.

Depth 

(feet) Description

380 Slightly gravelly sandy silt ((g)sM); silt with very fine to 

coarse sand, granules to small pebbles, and trace clay; 

very poorly sorted; light brownish gray (2.5Y 6/2); 

pyroclastic.

390 Slightly gravelly sandy clayey silt ((g)sM): silt with clay, 

fine to coarse sand, and granules to small pebbles; very 

poorly sorted; brown (10YR 5/3); pyroclastic.

400 Sandy clayey silt (sM); silt, clay, and fine to coarse sand 

with trace very coarse sand; moderately to poorly 

sorted; pale brown (10YR 6/3); slightly calcareous; 

pyroclastic.

405 Sandy silt (sZ); silt with fine to coarse sand and trace 

very coarse sand; moderately to poorly sorted; light 

brownish gray (2.5Y 6/2); pyroclastic.

2C shoe

410 Slightly gravelly sandy clayey silt ((g)sM): silt with clay, 

fine to coarse sand, and granules to small pebbles; 

very poorly sorted; light gray (2.5Y 7/2); calcareous; 

pyroclastic.

420 Slightly gravelly sandy silt ((g)sM); silt with fine to 

coarse sand, granules to small pebbles, and trace clay 

and very coarse sand; very poorly sorted; pale brown 

(10YR 6/3); slightly calcareous; pyroclastic.

430 Sandy clayey silt (sM); silt with clay, fine to coarse sand, 

and trace granules; poorly to very poorly sorted; light 

brownish gray (10YR 6/2); calcareous; pyroclastic.

440 Gravelly silty sand (gmS); medium to very coarse sand 

and silt with granules to small pebbles and trace clay; 

very poorly sorted; angular to subangular; light gray 

(2.5Y 7/2); pyroclastic.

450 Sandy silt (sZ); silt with fine to coarse sand and trace 

granules; poorly sorted; pale brown (10YR 6/3); 

slightly calcareous; pyroclastic.

460 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand and trace coarse sand; moderately to 

poorly sorted; light gray (2.5Y 7/2); pyroclastic.

470 Sandy silt (sZ); silt with very fine to medium sand and 

trace granules to small pebbles; moderately sorted; 

light brownish gray (2.5Y 6/2); pyroclastic.

480 Silty sand (zS); very fine to medium sand with silt and 

trace coarse to very coarse sand; moderately sorted; 

subangular to subrounded; light gray (2.5Y 7/2); 

calcareous; pyroclastic.

490 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; poorly sorted; light gray (2.5Y 7/2); calcareous.

500 Slightly gravelly sandy clayey silt ((g)sM): silt with 

clay, medium to very coarse sand, and granules to 

small pebbles; very poorly sorted; light brownish gray 

(2.5Y 6/2); pyroclastic.

Table 10A. Lithologic SHAKER log for multiple-well monitoring site NELT2 (15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,054 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, September 6, 2011. Total depth drilled, 

840 feet. Screened intervals, 760–800, 510–530, and 280–300 feet. Washed—sample was washed to remove fine grained material and drilling mud]
Tables 79

Depth 

(feet) Description

510 Slightly gravelly sandy clayey silt ((g)sM): silt with clay, 

medium to very coarse sand, and granules to small 

pebbles; very poorly sorted; light gray (10YR 7/2); 

slightly calcareous; pyroclastic.

520 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly to very 

poorly sorted; angular to subangular; light brownish 

gray (2.5Y 6/2); calcareous; pyroclastic.

530 Slightly gravelly sandy clayey silt ((g)sM): silt with clay, 

medium to very coarse sand, and granules to small 

pebbles; very poorly sorted; light gray (10YR 7/2); 

slightly calcareous; pyroclastic.

540 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; light gray 

(10YR 7/2); calcareous; pyroclastic.

550 Sandy clayey silt (sM); silt with clay and fine to 

coarse sand; moderately to poorly sorted; light gray 

(2.5Y 7/2); slightly calcareous; pyroclastic.

560 Slightly gravelly sandy clayey silt ((g)sM): silt with clay, 

medium to very coarse sand, and granules; very poorly 

sorted; light gray (10YR 7/2); calcareous; pyroclastic.

570 Sandy clayey silt (sM); silt with clay, fine to coarse sand, 

and trace granules; poorly sorted; brown (10YR 5/3); 

calcareous; pyroclastic.

580 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; very 

poorly sorted; angular to subangular; light brownish 

gray (10YR 6/2); pyroclastic.

590 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; moderately to poorly sorted; light brownish gray 

(10YR 6/2); slightly calcareous; pyroclastic.

600 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to small pebbles, and trace clay; 

poorly to very poorly sorted; angular to subangular; 

brown (10YR 5/3); slightly calcareous.

610 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; subangular to subrounded; light 

brownish gray (10YR 6/2); pyroclastic.

620 Gravelly silty sand (gmS); fine to coarse sand with silt 

and granules to small pebbles; poorly to very poorly 

sorted; subangular to subrounded; grayish brown 

(10YR 5/2); slightly calcareous; volcanic?

630 Sandy clayey silt (sM); silt with clay, fine to medium 

sand, and trace granules; moderately to poorly sorted; 

grayish brown (10YR 5/2); pyroclastic.

Depth 

(feet) Description

640 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly to 

very poorly sorted; subangular to subrounded; brown 

(10YR 5/3); volcanic?

650 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark grayish brown (10YR 4/2); 

volcanic?

660 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark grayish brown (10YR 4/2); 

volcanic?

670 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark grayish brown (10YR 4/2); 

volcanic?

680 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; grayish brown (10YR 5/2); 

volcanic?

690 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark grayish brown (10YR 4/2); 

volcanic?

700 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; poorly sorted; 

angular to subangular; brown (10YR 5/3); volcanic?

710 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; grayish brown (10YR 5/2); 

volcanic.

720 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; brown (10YR 5/3); volcanic.

725 Crystal tuff; weakly chloritic siliceous crystal tuff with 

minor vugs and local hematitic alteration; dark grayish 

brown (10YR 4/2).

3C shoe

730 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark grayish brown (10YR 4/2); 

volcanic.

740 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; very dark grayish brown 

(10YR 3/2); volcanic.

750 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; very dark grayish brown 

(10YR 3/2); volcanic.

Table 10A. Lithologic SHAKER log for multiple-well monitoring site NELT2 (15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,054 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, September 6, 2011. Total depth drilled, 

840 feet. Screened intervals, 760–800, 510–530, and 280–300 feet. Washed—sample was washed to remove fine grained material and drilling mud]
80 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Table 10A. Lithologic SHAKER log for multiple-well monitoring 

site NELT2 (15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National 

Training Center, California.—Continued

[Altitude of land surface, approximately 3,054 feet. Drilled by 

U.S. Geological Survey using mud-rotary drilling method, September 6, 2011. 

Total depth drilled, 840 feet. Screened intervals, 760–800, 510–530, and 

280–300 feet. Washed—sample was washed to remove fine grained material 

and drilling mud]

Depth 

(feet) Description

730–750 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

very angular to angular; very dark brown (10YR 2/2); 

volcanic.

Washed

760 Gravelly clayey silty sand (gmS); medium to very 

coarse sand with silt, clay, and granules to small 

pebbles; poorly sorted; angular to subangular; brown 

(10YR 5/3); pyroclastic.

770 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; poorly sorted; 

angular to subangular; brown (7.5YR 5/3); volcanic.

780 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; well to moderately 

sorted; angular to subangular; brown (7.5YR 4/2); 

volcanic.

780 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; dark brown (7.5YR 3/2); abundant 

hematitic alteration; volcanic.

Washed

790 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; well to moderately 

sorted; angular to subangular; brown (7.5YR 4/2); 

volcanic.

800 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; well to moderately 

sorted; angular to subangular; dark brown (7.5YR 3/2); 

volcanic.

810 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; well to moderately 

sorted; angular to subangular; brown (7.5YR 4/3); 

volcanic.

820 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; brown (7.5YR 4/2); volcanic.

830 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark brown (7.5YR 3/2); 

volcanic.

830 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

very angular to angular; very dark brown (7.5YR 

2.5/2); bedrock; volcanic.

Washed

840 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; very dark grayish brown 

(10YR 3/2); volcanic.
Tables 81

Depth

(feet) Description

From To

0 18 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; moderately to 

poorly sorted; angular to subrounded; dark brown 

(7.5YR 3/3); slightly calcareous.

18 40 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; moderately to 

poorly sorted; angular to subangular; dark brown 

(7.5YR 3/2); slightly calcareous.

40 60 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; moderately to 

poorly sorted; angular to subangular; dark brown 

(7.5YR 3/2).

60 80 Gravelly sand (gS); medium to very coarse sand 

with granules and trace small pebbles; well to 

moderately sorted; angular to subangular; dark 

brown (7.5YR 3/4).

80 100 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subrounded; dark brown (7.5YR 3/3).

100 120 Gravelly sand (gS); medium to very coarse sand with 

granules; well to moderately sorted; subangular 

to subrounded; dark brown (7.5YR 3/2); slightly 

micaceous.

120 140 Gravelly sand (gS); medium to very coarse sand with 

granules; well to moderately sorted; angular to 

subangular; dark brown (7.5YR 3/3).

140 160 Sand (S); medium to very coarse sand with trace 

granules; well to moderately sorted; angular to 

subangular; dark brown (7.5YR 3/2).

160 180 Sand (S); medium to very coarse sand with trace 

granules to small pebbles; well to moderately 

sorted; angular to subrounded; dark brown 

(7.5YR 3/3).

180 200 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; dark brown (7.5YR 3/2); 

slightly micaceous.

200 205 No sample collected; cored interval.

205 220 Silty sand (zS); medium to very coarse sand with silt; 

moderately to poorly sorted; angular to subangular; 

dark brown (7.5YR 3/2).

Depth

(feet) Description

From To

220 240 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

angular to subangular; dark brown (7.5YR 3/2).

240 260 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; angular to subangular; 

dark brown (7.5YR 3/2).

260 280 Silty clay (M); clay with silt and trace medium to 

coarse sand; moderately to well sorted; brown 

(7.5YR 4/3); calcareous.

280 300 Sand (S); medium to very coarse sand with trace 

granules and silt; moderately sorted; subangular 

to subrounded; dark brown (7.5YR 3/2); slightly 

micaceous.

300 320 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark brown (7.5YR 3/2).

320 340 Silty clayey sand (mS); medium to very coarse sand 

with clay, silt, and trace granules to small pebbles; 

poorly sorted; subrounded to rounded; brown 

(7.5YR 5/2); calcareous.

340 360 Silty sand (zS); very fine to medium sand with silt, 

trace clay, and trace granules; moderately to poorly 

sorted; subrounded to rounded; brown (10YR 4/3); 

slightly calcareous.

360 380 Silty clayey sand (mS); medium to very coarse sand 

with clay and silt; moderately to poorly sorted; 

subrounded to rounded; brown (10YR 5/3); 

calcareous; white clay; pyroclastic.

380 400 Silty clayey sand (mS); medium to very coarse sand 

with clay, silt, and trace granules; poorly sorted; 

subangular to subrounded; brown (10YR 5/3); 

calcareous; white clay; pyroclastic.

400 405 No sample collected; cored interval.

405 420 Silty clayey sand (mS); medium to very coarse sand 

with clay, silt, and trace granules; poorly sorted; 

subangular to subrounded; pale brown (10YR 6/3); 

calcareous; white clay; pyroclastic.

420 440 Sandy silty clay (sM); clay with silt, fine to coarse 

sand, and trace granules; poorly sorted; light gray 

(10YR 7/2); calcareous; white clay; pyroclastic.

Table 10B. Lithologic SIEVE log for multiple-well monitoring site NELT2 (15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,054 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, September 6, 2011. Total depth drilled, 

840 feet. Screened intervals, 760–800, 510–530, and 280–300 feet.]
82 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

440 460 Clayey silty sand (mS); medium to very coarse sand 

with silt and clay; moderately to poorly sorted; 

subangular to subrounded; light brownish gray 

(10YR 6/2); slightly calcareous; pyroclastic.

460 480 Sandy silty clay (sM); clay with silt, very fine to 

medium sand, and trace granules; moderately to 

poorly sorted; light yellowish brown (2.5Y 6/3); 

slightly calcareous; white clay; pyroclastic.

480 500 Sandy silty clay (sM); clay with silt and medium to 

very coarse sand; poorly sorted; light brownish gray 

(2.5Y 6/2); calcareous; pyroclastic.

500 520 Clayey silty sand (mS); fine to coarse sand with silt 

and clay; poorly sorted; subrounded to rounded; 

light brownish gray (2.5Y 6/2); calcareous; 

pyroclastic.

520 540 Sandy silty clay (sM); clay with silt, medium to very 

coarse sand, and trace granules; poorly sorted; light 

gray (10YR 7/2); calcareous; pyroclastic.

540 560 Clayey silty sand (mS); medium to very coarse sand 

with silt, clay, and trace granules; poorly to very 

poorly sorted; subangular to subrounded; light 

brownish gray (10YR 6/2); calcareous; pyroclastic.

560 580 Clayey sand (cS); medium to very coarse sand with 

clay and trace granules to small pebbles; poorly 

sorted; subangular to subrounded; light gray 

(2.5Y 7/2); calcareous; pyroclastic.

580 600 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; light yellowish 

brown (2.5Y 6/3); slightly calcareous; pyroclastic.

600 620 Silty sand (zS); medium to very coarse sand with silt 

and trace granules to small pebbles; moderately 

to poorly sorted; angular to subangular; brown 

(10YR 4/3); slightly calcareous; volcanic?

620 640 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 4/3); slightly calcareous; 

volcanic?

640 660 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

angular to subrounded; dark yellowish brown 

(10YR 4/4); slightly calcareous; volcanic?

Table 10B. Lithologic SIEVE log for multiple-well monitoring site NELT2 (15N/03E-06L1S, -06L2S, -06L3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,054 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, September 6, 2011. Total depth drilled, 

840 feet. Screened intervals, 760–800, 510–530, and 280–300 feet.]

Depth

(feet) Description

From To

660 680 Silty sand (zS); medium to very coarse sand with silt; 

moderately to poorly sorted; angular to subangular; 

dark brown (10YR 3/3); slightly calcareous; 

volcanic?

680 700 Sand (S); fine to medium sand; well sorted; subangular 

to subrounded; brown (7.5YR 4/3); calcareous; 

volcanic?

700 705 No sample collected; cored interval.

705 720 Sand (S); medium to very coarse sand; well sorted; 

subangular to angular; dark brown (7.5YR 3/2); 

slightly calcareous; volcanic?

720 725 No sample collected; cored interval.

725 740 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subangular to angular; dark brown (7.5YR 3/3); 

slightly calcareous; volcanic?

740 760 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subrounded to angular; very dark gray (7.5YR 3/1); 

slightly calcareous; volcanic?

760 780 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay and granules to small pebbles; poorly 

sorted; subrounded to subangular; dark brown 

(7.5YR 3/4); pyroclastic.

780 800 Sand (S); medium to very coarse sand with trace 

granules; moderately to well sorted; angular to very 

angular; dark brown (7.5YR 3/3); volcanic?

800 820 Silty sand (zS); medium to very coarse sand with silt 

and trace granules to small pebbles; poorly sorted; 

subangular to angular; dark reddish gray (5YR 4/2); 

volcanic?

820 840 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand; well to moderately 

sorted; very angular; dark reddish brown (5YR 3/2); 

volcanic.
Tables 83

Depth 

(feet) Description

10 Gravel (G); granules to medium pebbles with minor 

very fine to very coarse sand; poorly to moderately 

sorted; rounded to well rounded; brown (7.5YR 4/2); 

calcareous.

20 Sandy gravel (sG); granules to small pebbles with very 

fine to very coarse sand and minor clay; very poorly 

sorted; rounded to well rounded; brown (7.5YR 5/3); 

calcareous.

30 Sandy clayey gravel (mG); granules to large pebbles with 

clay and very fine to very coarse sand; very poorly 

sorted; angular to subrounded; light yellowish brown 

(10YR 6/4); calcareous.

40 Silty gravelly clayey sand (gmS); very fine to very coarse 

sand and clay with granules to small pebbles and silt; 

very poorly sorted; subangular to subrounded; brown 

(7.5YR 5/3).

50 Slightly gravelly sandy clay ((g)sM); clay with very fine 

to very coarse sand and granules to medium pebbles; 

very poorly sorted; brown (7.5YR 5/3).

60 Sandy gravelly clay (gM); clay with granules to small 

pebbles and very fine to very coarse sand; very poorly 

sorted; brown (7.5YR 5/2).

70 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and minor clay; very 

poorly sorted; subangular to rounded; dark grayish 

brown (10YR 4/2).

80 Sandy clayey gravel (mG); granules to small pebbles 

with clay and fine to very coarse sand; very poorly 

sorted; subangular to rounded; brown (10YR 5/3); 

calcareous.

90 Clayey sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subangular; brown 

(10YR 5/3); calcareous.

100 Sandy gravelly clay (gM); clay, granules, and very fine 

to very coarse sand with trace silt; very poorly sorted; 

light brownish gray (10YR 6/2).

110 Slightly gravelly sandy clay ((g)sM); clay with very fine 

to very coarse sand and granules to small pebbles with 

minor silt; very poorly sorted; brown (10YR 4/3).

120 Sandy clay (sC); clay with very fine to medium sand; 

moderately sorted; brown (10YR 5/3).

130 Silty clay (M); clay and silt with minor very fine to very 

coarse sand; poorly to well sorted; grayish brown 

(10YR 5/2).

Depth 

(feet) Description

140 Sandy clayey silt (sM); silt with clay and very fine 

to very coarse sand; poorly sorted; grayish brown 

(10YR 5/2).

150 Gravelly silty clay (gM); clay with silt and granules 

to medium pebbles; very poorly sorted; light brown 

(7.5YR 6/3); slightly calcareous.

160 Sandy clay (sC); clay with very fine to medium sand; 

moderately sorted; pinkish gray (7.5YR 6/2); 

calcareous.

170 Sandy clay (sC); clay with very fine to coarse sand and 

trace granules to small pebbles; poorly sorted; brown 

(7.5YR 5/3); calcareous.

180 Gravelly sandy silty clay (gM); clay and silt with very 

fine to very coarse sand and granules to medium 

pebbles; very poorly sorted; light brown (7.5YR 6/3); 

calcareous.

190 Sandy clay (sC); clay with very fine to coarse sand and 

minor silt with trace granules to small pebbles; poorly 

sorted; pale brown (10YR 6/3).

200 Slightly gravelly clay ((g)M); clay with granules to small 

pebbles and minor very fine to medium sand; very 

poorly sorted; pale brown (10YR 6/3); calcareous; 

tephra (0.5–4 mm).

205 Slightly gravelly silty sandy clay ((g)sM); clay with very 

fine to coarse sand and silt with granules; very poorly 

sorted; brown (10YR 5/3); slightly calcareous.

1C shoe

210 Clay (C); clay with minor very fine to coarse sand and 

trace granules to small pebbles; moderately to well 

sorted; brown (10YR 5/3).

220 Sandy gravelly clay (gM); clay with granules to small 

pebbles and very fine to very coarse sand; very poorly 

sorted; light yellowish brown (10YR 6/4); calcareous.

230 Slightly gravelly sandy clay ((g)sM); clay with very fine 

to medium sand and granules to medium pebbles; very 

poorly sorted; pale brown (10YR 6/3); calcareous; 

tephra (2–9 mm).

240 Sandy gravelly clay (gM); clay with granules to medium 

pebbles and very fine to very coarse sand; very 

poorly sorted; brown (10YR 5/3); calcareous; tephra 

(2–10 mm).

250 Slightly gravelly sandy clay ((g)sM); clay with very fine 

to very coarse sand and granules to small pebbles with 

trace silt; very poorly sorted; pale brown (10YR 6/3); 

calcareous.

Table 11A. Lithologic SHAKER log for test well NELT4 (15N/03E-08L1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 2,990 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 885 feet. Screened intervals, 560–580, 500–520, and 320–480 feet. Washed—sample was washed to remove fine grained material and drilling mud]
84 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

260 Sandy silty clayey gravel (mG); granules to medium 

pebbles and clay with silt and very fine to very 

coarse sand; very poorly sorted; angular; pale brown 

(10YR 6/3); calcareous.

270 Slightly gravelly sandy silty clay ((g)sM); clay and silt 

with very fine to coarse sand and granules to small 

pebbles; very poorly sorted; light brown (7.5YR 6/3); 

calcareous.

280 Slightly gravelly sandy silty clay ((g)sM); clay and silt 

with very fine to coarse sand and granules to small 

pebbles; very poorly sorted; pale brown (10YR 6/3); 

slightly calcareous.

290 Sandy clay (sC); clay with very fine to very coarse sand 

and trace granules; very poorly sorted; pale brown 

(10YR 6/3); calcareous.

300 Sandy clay (sC); clay with very fine to very coarse sand 

and trace granules; very poorly sorted; pale brown 

(10YR 6/3); calcareous.

310 Slightly gravelly sandy clayey silt ((g)sM): silt and 

clay with very fine to very coarse sand and granules; 

very poorly sorted; light brownish gray (10YR 6/2); 

calcareous.

320 Slightly gravelly sandy clayey silt ((g)sM): silt and clay 

with very fine to very coarse sand and granules to 

small pebbles; very poorly sorted; light brownish gray 

(2.5Y 6/2); slightly calcareous.

330 Sandy clayey silt (sM); silt with clay and very fine 

to coarse sand; poorly sorted; light olive brown 

(2.5Y 5/3).

340 Clayey sandy silt (sM); silt and very fine to very coarse 

sand with clay; very poorly sorted; light olive brown 

(2.5Y 5/3); slightly calcareous.

350 Clayey sandy silt (sM); silt and very fine to very coarse 

sand with clay; very poorly sorted; olive brown 

(2.5Y 4/3); slightly calcareous.

360 Clayey silty sand (mS); very fine to very coarse sand 

with silt and clay and trace granules to small pebbles; 

very poorly sorted; subangular to rounded; grayish 

brown (10YR 5/2); slightly calcareous.

360 Gravelly sand (gS); very fine to very coarse sand with 

granules to small pebbles and minor silt; very poorly 

sorted; very angular to subrounded; dark grayish 

brown (10YR 4/2).

Washed

370 Silty gravelly clayey sand (gmS); very fine to very coarse 

sand and clay with granules and silt; very poorly 

sorted; subrounded; brown (10YR 5/3).

Depth 

(feet) Description

380 Sandy gravel (sG); granules to medium pebbles with very 

fine to very coarse sand and minor clay; very poorly 

sorted; angular to subrounded; light olive brown 

(2.5Y 5/3); slightly calcareous.

380 Sandy gravel (sG); granules to medium pebbles with very 

fine to very coarse sand; very poorly sorted; angular to 

subrounded; dark grayish brown (2.5Y 4/2); slightly 

calcareous.

Washed

390 Clayey sandy gravel (msG); granules with very fine to 

very coarse sand and clay; very poorly sorted; angular 

to subrounded; brown (10YR 5/3); slightly calcareous.

400 Clayey sandy gravel (msG); granules to medium pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subrounded; grayish brown 

(2.5Y 5/2); calcareous.

410 Sandy clayey gravel (mG); granules to medium pebbles 

with clay and very fine to very coarse sand; very 

poorly sorted; angular to subrounded; light olive 

brown (2.5Y 5/3); calcareous.

420 Sandy clayey silty gravel (mG); granules to medium 

pebbles with silt, clay, and very fine to very coarse 

sand; very poorly sorted; angular to subrounded; light 

olive brown (2.5Y 5/3); slightly calcareous.

430 Sandy clayey silty gravel (mG); granules to small 

pebbles with silt, clay, and very fine to very coarse 

sand; very poorly sorted; angular to subrounded; 

grayish brown (2.5Y 5/2); calcareous.

440 Clayey silty sandy gravel (msG); granules to small 

pebbles with very fine to very coarse sand, silt, and 

clay; very poorly sorted; subangular to rounded; 

grayish brown (2.5Y 5/2); calcareous.

450 Sandy gravel (sG); granules to small pebbles with fine to 

very coarse sand and minor clay; very poorly sorted; 

subangular to rounded; grayish brown (2.5Y 5/2); 

calcareous.

460 Sandy gravel (sG); granules to medium pebbles with fine 

to very coarse sand and minor clay; very poorly sorted; 

subangular to rounded; dark grayish brown (2.5Y 4/2); 

calcareous.

470 Sandy gravel (sG); granules to medium pebbles with fine 

to very coarse sand and minor clay; very poorly sorted; 

subangular to rounded; light brownish gray (2.5Y 6/2); 

calcareous.

Table 11A. Lithologic SHAKER log for test well NELT4 (15N/03E-08L1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 2,990 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 885 feet. Screened intervals, 560–580, 500–520, and 320–480 feet. Washed—sample was washed to remove fine grained material and drilling mud]
Tables 85

Table 11A. Lithologic SHAKER log for test well NELT4 (15N/03E-08L1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 2,990 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 885 feet. Screened intervals, 560–580, 500–520, and 320–480 feet. Washed—sample was washed to remove fine grained material and drilling mud]

Depth 

(feet) Description

480 Sandy gravel (sG); granules to small pebbles with fine to 

very coarse sand and minor clay; very poorly sorted; 

subangular to subrounded; grayish brown (2.5Y 5/2); 

calcareous.

490 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; grayish brown 

(2.5Y 5/2); calcareous.

500 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; grayish brown 

(2.5Y 5/2); calcareous.

503 Gravel (G); granules to large pebbles with minor clay; 

poorly sorted;subrounded to rounded; olive gray 

(5Y 4/2); slightly calcareous.

2C bottom

510 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and minor clay; poorly 

sorted; angular to subrounded; grayish brown 

(2.5Y 5/2); calcareous.

520 Sandy gravel (sG); granules to small pebbles with 

medium to very coarse sand and minor clay; poorly 

sorted; angular to subrounded; grayish brown 

(2.5Y 5/2); calcareous.

530 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand and minor clay; moderately 

to poorly sorted; subangular to subrounded; light 

brownish gray (2.5Y 6/2); calcareous.

540 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and trace clay; poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

calcareous.

550 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

calcareous.

560 Clayey sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; subangular to subrounded; olive gray 

(5Y 4/2); calcareous.

570 Clayey sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; subangular to subrounded; olive gray 

(5Y 5/2); calcareous.

Depth 

(feet) Description

580 Clayey sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; subangular to rounded; olive gray 

(5Y 5/2); calcareous.

590 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

slightly calcareous.

600 Clayey sandy gravel (msG); granules to small pebbles 

with coarse to very coarse sand and clay; very poorly 

sorted; subrounded; olive gray (5Y 5/2); calcareous.

610 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

slightly calcareous.

620 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

slightly calcareous.

630 Clayey sandy gravel (msG); granules to small pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

calcareous.

640 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; angular to subrounded; olive gray (5Y 5/2); 

calcareous.

650 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; angular to subrounded; olive gray (5Y 5/2); 

slightly calcareous.

660 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; angular to subrounded; olive gray (5Y 5/2); 

calcareous.

670 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subrounded; olive gray (5Y 4/2); 

calcareous.

680 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand and minor clay; poorly 

sorted; subangular to subrounded; olive gray (5Y 5/2); 

slightly calcareous.
86 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Table 11A. Lithologic SHAKER log for test well NELT4 (15N/03E-08L1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 2,990 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 885 feet. Screened intervals, 560–580, 500–520, and 320–480 feet. Washed—sample was washed to remove fine grained material and drilling mud]

Depth 

(feet) Description

690 Clayey sandy gravel (msG); granules with medium 

to very coarse sand and clay; very poorly sorted; 

subangular to subrounded; olive gray (5Y 5/2); 

calcareous.

700 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subrounded; olive gray (5Y 5/2); 

calcareous.

710 Clayey sandy gravel (msG); granules with fine to very 

coarse sand and clay; very poorly sorted; subangular to 

rounded; olive gray (5Y 5/2); slightly calcareous.

720 Clayey sandy gravel (msG); granules with fine to very 

coarse sand and clay; very poorly sorted; subangular to 

rounded; olive gray (5Y 5/2); calcareous.

730 Clayey sandy gravel (msG); granules with small pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to rounded; olive gray (5Y 5/2); 

calcareous.

740 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to rounded; olive gray (5Y 5/2); 

calcareous.

750 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; subangular to subrounded; gray (5Y 5/1); 

calcareous.

760 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; angular to subrounded; olive gray (5Y 5/2); 

calcareous.

770 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; poorly to moderately 

sorted; very angular to subangular; olive gray (5Y 5/2); 

calcareous.

780 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; moderately sorted; very 

angular; olive gray (5Y 4/2); biotite-rich.

780 Gravel (G); granules to medium pebbles with minor very 

coarse sand; moderately to well sorted; very angular; 

salt and pepper; biotite-rich.

Washed

790 Gravel (G); granules to medium pebbles with minor 

medium to very coarse sand; moderately to well 

sorted; very angular; salt and pepper; biotite-rich.

800 Clayey sandy gravel (msG); granules to large pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; very angular to subangular; olive gray (5Y 4/2); 

biotite-rich (heavily weathered bedrock).

Depth 

(feet) Description

800 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand; poorly sorted; very 

angular; salt and pepper; biotite-rich (heavily 

weathered bedrock).

Washed

810 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; very angular; olive gray (5Y 5/2); biotite-rich 

(heavily weathered bedrock).

820 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; very angular; olive gray (5Y 4/2); biotite-rich 

(moderately to heavily weathered bedrock).

830 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; very angular; light olive brown (2.5Y 5/3); 

biotite-rich (lightly to moderately weathered bedrock).

840 Sandy gravel (sG); granules to large pebbles with fine 

to very coarse sand and minor clay; poorly sorted; 

very angular; light brownish gray (2.5Y 6/2); felsic 

(bedrock).

850 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; very angular; dark greenish gray (10Y 4/1); 

biotite-rich (bedrock).

860 Clayey sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; very angular; dark greenish gray (10Y 4/1); 

biotite-rich (bedrock).

870 Sandy gravel (sG); granules to large pebbles with 

medium to very coarse sand and minor clay; poorly 

to moderately sorted; angular to subangular; salt and 

pepper; biotite-rich (bedrock).

880 Clayey sandy gravel (msG); granules to large pebbles 

with medium to very coarse sand and clay; very poorly 

sorted; very angular to subangular; salt and pepper; 

biotite-rich (bedrock).

880 Granadiorite; medium to coarse crystalline granadiorite; 

weakly to moderately foliated; light gray (10YR 7/1); 

leucratic; hematite stained fractures; band or dike?

3C top

885 Gneiss; fine to coarse crystalline intermediate gneiss; 

moderately to strongly foliated; salt and pepper; 

hematite stained fractures; proto-igneous?

3C bottom
Tables 87

Depth

(feet) Description

From To

0 20 Gravelly sand (gS); very fine to very coarse sand with 

granules to medium pebbles and trace clay; very 

poorly sorted; subrounded to rounded; yellowish 

brown (10YR 5/4); calcareous.

20 40 Sand (S); very fine to very coarse sand with minor 

clay; moderately to poorly sorted; subrounded 

to rounded; dark yellowish brown (10YR 4/4); 

calcareous; caliche.

40 60 Slightly gravelly clayey sand ((g)mS); very fine to 

very coarse sand with clay and granules to small 

pebbles; very poorly sorted; subrounded; brown 

(10YR 5/3); slightly calcareous.

60 80 Clayey silty sand (mS); very fine to very coarse sand, 

silt and clay with trace granules; very poorly sorted; 

subrounded to rounded; brown (10YR 4/3).

80 100 Slightly gravelly sandy silty clay ((g)sM); clay, silt, 

and very fine to very coarse sand with granules 

to small pebbles; very poorly sorted; brown 

(10YR 4/3).

100 120 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; subrounded to rounded; brown 

(10YR 4/3).

120 140 Silty clay (M); clay with silt and minor very fine to 

very coarse sand; moderately to well sorted; pale 

brown (10YR 6/3); slightly calcareous.

140 160 Sandy silty clay (sM); clay with silt and very fine 

to medium sand with trace granules; moderately 

sorted; brown (10YR 5/3); slightly calcareous.

160 180 Slightly gravelly sandy silty clay ((g)sM); clay with 

silt and very fine to coarse sand with granules to 

small pebbles; poorly sorted; brown (10YR 5/3); 

calcareous.

180 200 Gravelly sandy clayey silt (gM); silt with clay and 

very fine to coarse sand with granules to small 

pebbles; very poorly sorted; light brownish gray 

(10YR 6/2); calcareous; minor very well indurated 

clayey silt (10–18 mm); light gray (10YR 7/2); 

highly calcareous (tephra?).

200 205 No sample collected; cored interval.

205 220 Sandy clayey silt (sM); silt and clay with very fine to 

coarse sand; poorly sorted; pale brown (10YR 6/3); 

calcareous.

220 240 Sandy clayey silt (sM); silt with clay and very 

fine to medium sand; moderately sorted; brown 

(10YR 5/3); slightly calcareous.

Depth

(feet) Description

From To

240 260 Sandy clayey silt (sM); silt with clay and very fine to 

coarse sand; moderately to poorly sorted; brown 

(10YR 5/3); slightly calcareous.

260 280 Slightly gravelly sandy clayey silt ((g)sM): silt with 

clay and very fine to coarse sand with granules to 

small pebbles; poorly sorted; pale brown (10YR 

6/3); calcareous.

280 300 Sandy clayey silt (sM); silt with clay and very fine 

to coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

300 320 Slightly gravelly sandy clayey silt ((g)sM); silt with 

clay and very fine to coarse sand with granules to 

small pebbles; poorly sorted; brown (10YR 5/3); 

slightly calcareous.

320 340 Clayey silty sand (mS); very fine to medium sand with 

silt and clay with minor very coarse sand; poorly to 

moderately sorted; subrounded to rounded; grayish 

brown (10YR 5/2); slightly calcareous.

340 360 Clayey silty sand (mS); very fine to coarse sand with 

silt and clay with trace granules to medium pebbles; 

poorly sorted; subrounded; brown (10YR 4/3); 

slightly calcareous.

360 380 Slightly gravelly silty sand ((g)mS); very fine to very 

coarse sand with silt and granules to small pebbles; 

poorly to very poorly sorted; subangular to rounded; 

dark grayish brown (10YR 4/2); calcareous.

380 400 Gravelly sand (gS); very fine to very coarse sand with 

granules to small pebbles and minor silt; poorly to 

very poorly sorted; subangular to rounded; dark 

grayish brown (10YR 4/2); calcareous.

400 420 Gravelly sand (gS); very fine to very coarse sand with 

granules to medium pebbles and minor silt; very 

poorly sorted; subrounded to rounded; dark grayish 

brown (10YR 4/2); slightly calcareous.

420 440 Sandy gravel (sG); granules to medium pebbles with 

very fine to very coarse sand and minor silt; very 

poorly sorted; subangular to rounded; dark grayish 

brown (10YR 4/2); slightly calcareous; minor mica.

440 460 Gravelly silty sand (gmS); very fine to very coarse 

sand and silt with granules to medium pebbles; very 

poorly sorted; subrounded to rounded; dark grayish 

brown (10YR 4/2); slightly calcareous; minor mica.

460 480 Silty sandy gravel (msG); granules to medium pebbles 

with very fine to very coarse sand and silt; very 

poorly sorted; angular to rounded; dark grayish 

brown (10YR 4/2); slightly calcareous.

Table 11B. Lithologic SIEVE log for test well NELT4 (15N/03E-08L1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 2,990 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 885 feet. Screened intervals, 560–580, 500–520, and 320–480 feet. Abbreviation: mm, millimeter]
88 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

480 500 Silty sandy gravel (msG); granules to medium pebbles 

with very fine to very coarse sand and silt; very 

poorly sorted; subangular to rounded; grayish 

brown (10YR 5/2); slightly calcareous; micaceous.

500 503 No sample collected; cored interval.

503 520 Sandy gravel (sG); granules to small pebbles with very 

fine to very coarse sand and minor silt; very poorly 

sorted; subangular to rounded; grayish brown 

(2.5Y 5/2); biotite-rich; mafic-rich.

520 540 Sandy gravel (sG); granules to small pebbles with very 

fine to very coarse sand and minor silt; very poorly 

sorted; subrounded; grayish brown (2.5Y 5/2); 

slightly calcareous; biotite-rich; mafic-rich.

540 560 Slightly gravelly sand ((g)S); very fine to very coarse 

sand with granules; moderately to poorly sorted; 

subrounded; grayish brown (2.5Y 5/2); slightly 

calcareous; mafic-rich.

560 580 Sand (S); very fine to very coarse sand with trace 

granules to small pebbles; moderately sorted; 

subangular to subrounded; grayish brown 

(2.5Y 5/2); calcareous; mafic-rich.

580 600 Sand (S); very fine to very coarse sand with trace 

granules; moderately sorted; subrounded; grayish 

brown (2.5Y 5/2); calcareous; minor mafics.

600 620 Slightly gravelly sand ((g)S); very fine to very coarse 

sand with granules to small pebbles; moderately 

sorted; subangular to rounded; grayish brown 

(2.5Y 5/2); calcareous; mafic-rich.

620 640 Gravelly sand (gS); very fine to very coarse sand 

with granules to small pebbles; very poorly 

sorted; subangular to subrounded; grayish brown 

(2.5Y 5/2); calcareous; micaceous.

640 660 Gravelly sand (gS); very fine to very coarse sand 

with granules to small pebbles; very poorly sorted; 

subangular to rounded; grayish brown (2.5Y 5/2); 

calcareous; minor mica.

660 680 Gravelly sand (gS); very fine to very coarse sand 

with granules to small pebbles; very poorly sorted; 

subrounded; grayish brown (2.5Y 5/2); calcareous; 

trace mica.

Depth

(feet) Description

From To

680 700 Sand (S); very fine to very coarse sand; moderately 

sorted; subangular to subrounded; grayish brown 

(2.5Y 5/2); calcareous.

700 720 Slightly gravelly sand ((g)S); very fine to very coarse 

sand with granules; poorly to moderately sorted; 

subangular to rounded; olive gray (5Y 5/2); slightly 

calcareous.

720 740 Sand (S); very fine to very coarse sand with trace 

granules; moderately sorted; subrounded; olive gray 

(5Y 4/2); slightly calcareous; minor mica.

740 760 Slightly gravelly clayey sand ((g)mS); very fine to 

very coarse sand with clay and granules; very 

poorly sorted; subrounded; olive gray (5Y 4/2); 

calcareous.

760 780 Clayey sand (cS); very fine to very coarse sand with 

clay and trace granules; poorly to very poorly 

sorted; subrounded; olive gray (5Y 5/2); calcareous.

780 800 Clayey sand (cS); very fine to coarse sand with clay; 

poorly sorted; very angular to subrounded; olive 

gray (5Y 4/2); calcareous; micaceous; heavily 

weathered bedrock.

800 820 Clayey sandy gravel (msG); granules to small pebbles 

with very fine to very coarse sand and clay; very 

poorly sorted; angular to subrounded; olive gray 

(5Y 4/2); calcareous; biotite-rich; moderately to 

lightly weathered bedrock.

820 840 Sandy clayey gravel (mG); granules to medium 

pebbles with clay and very fine to very coarse sand; 

very poorly sorted; angular to rounded; olive gray 

(5Y 4/2); slightly calcareous; micaceous; lightly 

weathered bedrock.

840 860 Clayey sand (cS); very fine to coarse sand with 

clay and trace granules; poorly sorted; angular 

to subrounded; dark gray (5Y 4/1); calcareous; 

micaceous; bedrock.

860 880 Clayey sandy gravel (msG); granules to medium 

pebbles with very fine to very coarse sand and clay; 

very poorly sorted; angular; dark gray (5Y 4/1); 

calcareous; micaceous; bedrock.

880 885 No sample collected; cored interval.

Table 11B. Lithologic SIEVE log for test well NELT4 (15N/03E-08L1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 2,990 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 885 feet. Screened intervals, 560–580, 500–520, and 320–480 feet. Abbreviation: mm, millimeter]
Tables 89

Depth 

(feet) Description

10 Sandy gravel (sG); granules to small pebbles with 

coarse to very coarse sand; well to moderately 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

20 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4).

30 Sandy gravel (sG); granules to small pebbles with coarse 

to very coarse sand; well to moderately sorted; angular 

to subrounded; brown (10YR 4/3).

40 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 4/4).

50 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); calcareous.

60 Silty sandy gravel (msG); granules to medium pebbles 

and medium to very coarse sand with silt; poorly 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 4/6); calcareous.

70 Silty gravelly sand (gmS); medium to very coarse 

sand and granules to small pebbles with silt; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4); calcareous.

80 Silty gravelly sand (gmS); medium to very coarse sand 

and granules to medium pebbles with silt; moderately 

to poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4).

90 Clayey silty gravelly sand (gmS); medium to very coarse 

sand and granules to small pebbles with clay and silt; 

very poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4); calcareous.

100 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4).

110 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules; poorly to very poorly 

sorted; angular to subangular; brown (10YR 4/3).

120 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4).

130 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(10YR 4/3).

140 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly to 

very poorly sorted; subangular to subrounded; dark 

yellowish brown (10YR 4/4); slightly calcareous.

Depth 

(feet) Description

150 Silty clayey sand (mS); medium to very coarse sand with 

clay and silt; poorly sorted; angular to subangular; 

brown (10YR 4/3); slightly calcareous.

160 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4).

170 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; poorly to very poorly 

sorted; angular to subangular; brown (10YR 4/3); 

slightly calcareous.

180 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(7.5YR 5/3); slightly calcareous.

190 Silty clayey sand (mS); fine to coarse sand with 

clay, silt, and trace granules; poorly to very poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

200 Clayey sandy silt (sM); silt with medium to very coarse 

sand and clay; poorly sorted; brown (7.5YR 5/3); 

calcareous.

203 Sandy silt (sZ); silt with very fine to medium sand; 

well to moderately sorted; dark yellowish brown 

(10YR 4/4).

1C bottom

210 Gravelly clayey sand (gmS); medium to very coarse sand 

with clay and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

220 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; 

dark yellowish brown (10YR 4/4); slightly calcareous.

230 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 5/3).

240 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately to poorly sorted; brown 

(10YR 4/3).

250 Clayey sandy silt (sM); silt with fine to coarse sand, clay, 

and trace granules to small pebbles; poorly to very 

poorly sorted; yellowish brown (10YR 5/4).

260 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately to poorly sorted; brown 

(10YR 5/3).

270 Silty clayey sand (mS); fine to coarse sand with silt 

and clay; moderately to poorly sorted; subangular to 

subrounded; pale brown (10YR 6/3); calcareous; white 

clay.

280 Sandy clay (sC); clay with fine to coarse sand; 

moderately to poorly sorted; brown (7.5YR 5/4); 

calcareous.

290 Clayey sandy silt (sM); silt with fine to coarse sand and 

clay; moderately to poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

Table 12A. Lithologic SHAKER log for multiple-well monitoring site CCT1 (15N/03E-25L1S, -25L2S, -25L3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 2,688 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 8, 2011. Total depth drilled, 

903 feet. Screened intervals, 875–895, 730–750, and 645–665 feet.]
90 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Table 12A. Lithologic SHAKER log for multiple-well monitoring site CCT1 (15N/03E-25L1S, -25L2S, -25L3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,688 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 8, 2011. Total depth drilled, 

903 feet. Screened intervals, 875–895, 730–750, and 645–665 feet.]

Depth 

(feet) Description

300 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; moderately to poorly sorted; subangular 

to subrounded; yellowish brown (10YR 5/4).

303 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

2C bottom

310 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; 

brown (10YR 5/3); slightly calcareous.

320 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately to poorly sorted; very pale 

brown (10YR 8/2); calcareous; white clay.

330 Sandy clay (sC); clay with fine to coarse sand; 

moderately to poorly sorted; light brownish gray 

(10YR 6/2); calcareous; white clay.

340 Sandy clayey silt (sM); silt with clay, medium to very 

coarse sand, and trace granules; poorly sorted; brown 

(10YR 5/3); slightly calcareous.

350 Clay (C); clay with trace medium to very coarse sand; 

well sorted; brown (10YR 5/3); slightly calcareous.

360 Sandy clayey silt (sM); silt with clay and medium to 

very coarse sand; poorly sorted; light brownish gray 

(10YR 6/2); calcareous.

370 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; moderately to poorly sorted; grayish brown 

(10YR 5/2); slightly calcareous.

380 Sandy clayey silt (sM); silt with clay, fine to coarse 

sand, and trace very coarse sand; moderately to poorly 

sorted; brown (10YR 5/3); slightly calcareous.

390 Sandy clay (sC); clay with medium to very coarse 

sand; moderately to poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

400 Sandy clayey silt (sM); silt with clay and medium to 

very coarse sand; moderately to poorly sorted; brown 

(10YR 5/3).

410 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

420 Sandy clayey silt (sM); silt with clay and very fine 

to coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); slightly calcareous.

430 Sandy clayey silt (sM); silt with clay and very fine 

to coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

440 Sandy clayey silt (sM); silt with clay and medium to 

very coarse sand; poorly sorted; light brownish gray 

(10YR 6/2).

450 Sandy clayey silt (sM); silt with clay and very fine 

to coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

Depth 

(feet) Description

460 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

470 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately to poorly sorted; grayish 

brown (10YR 5/2); calcareous.

480 Sandy clayey silt (sM); silt with clay and very fine to 

coarse sand; poorly sorted; light gray (10YR 7/2); 

calcareous; white clay.

490 Sandy clayey silt (sM); silt with clay and medium to very 

coarse sand; poorly sorted; grayish brown (10YR 5/2); 

calcareous.

500 Sandy clayey silt (sM); silt with clay and medium to 

very coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

503 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; brown (10YR 5/3); 

calcareous.

3C bottom

510 Sandy silty clay (sM); clay with silt and very fine 

to coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

520 Sandy clayey silt (sM); silt, clay, and medium to very 

coarse sand with trace granules to small pebbles; 

poorly to very poorly sorted; pale brown (10YR 6/3); 

calcareous.

530 Sandy clayey silt (sM); silt with clay, medium to very 

coarse sand, and trace granules; poorly to very poorly 

sorted; dark grayish brown (10YR 4/2); calcareous.

540 Sandy clayey silt (sM); silt and clay with fine to coarse 

sand; moderately to poorly sorted; brown (10YR 5/3); 

calcareous.

550 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

560 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; subangular to 

angular; brown (10YR 5/3).

570 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; brown (10YR 5/3).

580 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

590 Sandy silty clay (sM); clay with silt and very fine to 

very coarse sand; poorly sorted; brown (10YR 5/3); 

calcareous.

600 Sandy silty clay (sM); clay with silt, very fine to medium 

sand, and trace granules to small pebbles; moderately 

to poorly sorted; brown (10YR 5/3); calcareous.
Tables 91

Table 12A. Lithologic SHAKER log for multiple-well monitoring site CCT1 (15N/03E-25L1S, -25L2S, -25L3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 2,688 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 8, 2011. Total depth drilled, 

903 feet. Screened intervals, 875–895, 730–750, and 645–665 feet.]

Depth 

(feet) Description

610 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

620 Sandy gravelly silty clay (gM); clay with silt, granules, 

and medium to very coarse sand; poorly to very poorly 

sorted; pale brown (10YR 6/3); calcareous.

630 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

640 Slightly gravelly sandy silt ((g)sM); silt with medium to 

very coarse sand and granules; poorly sorted; brown 

(10YR 5/3); slightly calcareous.

650 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

660 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

670 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

680 Sandy clayey silt (sM); silt, clay, and very fine to 

medium sand with trace granules; poorly sorted; 

brown (10YR 4/3); slightly calcareous.

690 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; poorly sorted; brown (10YR 5/3); slightly 

calcareous.

700 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; poorly sorted; brown (10YR 5/3); calcareous.

710 Sandy silt (sZ); silt with medium to very coarse sand; 

poorly sorted; brown (10YR 5/3); slightly calcareous.

720 Sandy clayey silt (sM); silt with clay and fine to coarse 

sand; poorly sorted; brown (10YR 5/3); slightly 

calcareous.

730 Silty sand (zS); very fine to coarse sand with silt; well 

to poorly sorted; subangular to subrounded; brown 

(10YR 5/3); calcareous.

740 Silty sand (zS); very fine to coarse sand with silt and 

trace very coarse sand; poorly sorted; subangular to 

subrounded; brown (10YR 5/3); calcareous.

750 Gravelly clayey silty sand (gmS); very fine to very coarse 

sand with silt and clay and granules to small pebbles; 

very poorly sorted; subangular to subrounded; brown 

(10YR 5/3); calcareous.

760 Sandy clayey silt (sM); silt with clay and medium to 

very coarse sand; poorly sorted; yellowish brown 

(10YR 5/4); calcareous.

770 Sandy silt (sZ); silt with medium to very coarse sand; 

poorly sorted; brown (10YR 5/3); slightly calcareous.

Depth 

(feet) Description

780 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4); calcareous.

790 Sandy clayey silt (sM); silt with clay and very fine to 

coarse sand; moderately to poorly sorted; brown 

(10YR 5/3); calcareous.

800 Slightly gravelly sandy silt ((g)sM); silt with medium 

to very coarse sand and granules to small pebbles; 

poorly sorted; yellowish brown (10YR 5/4); slightly 

calcareous.

810 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; pale brown (10YR 6/3); 

calcareous.

820 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

830 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

subangular to subrounded; brown (10YR 5/3); slightly 

calcareous.

840 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subrounded; brown (10YR 5/3); calcareous.

850 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3); slightly calcareous.

860 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

870 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; brown (10YR 5/3).

880 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

890 Silty clayey sand (mS); medium to very coarse sand with 

clay, silt, and trace granules; poorly sorted; angular to 

subangular; brown (10YR 5/3).

900 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

903 Poor recovery; no sample available.

 4C shoe
92 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 19 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4); calcareous; abundant quartz.

19 40 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subrounded; dark 

yellowish brown (10YR 4/4); calcareous.

40 60 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4); 

calcareous; micaceous.

60 80 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; dark yellowish 

brown (10YR 3/4); calcareous.

80 100 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; subangular to subrounded; dark 

yellowish brown (10YR 3/4); calcareous.

100 120 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 4/4); calcareous.

120 140 Silty sandy gravel (msG); granules to medium pebbles 

and medium to very coarse sand with silt; poorly 

sorted; subrounded to rounded; dark yellowish 

brown (10YR 4/4); slightly calcareous.

140 160 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately 

to poorly sorted; subangular to subrounded; dark 

yellowish brown (10YR 4/4); slightly calcareous.

160 180 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; moderately to poorly sorted; 

subangular to subrounded; yellowish brown 

(10YR 5/4).

180 200 Silty sand (zS); very fine to medium sand with silt 

and trace coarse sand; moderately to well sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 4/4).

Depth

(feet) Description

From To

200 220 Silty clayey sand (mS); very fine to coarse sand 

with clay and silt; moderately to poorly sorted; 

subrounded to rounded; yellowish brown 

(10YR 5/4); slightly calcareous.

220 240 Silty clayey sand (mS); very fine to medium sand 

with clay, silt, and trace coarse sand; moderately 

to poorly sorted; subangular to subrounded; brown 

(10YR 5/3); slightly micaceous.

240 260 Silty clayey sand (mS); very fine to medium sand 

with clay, silt, and trace coarse sand; moderately to 

poorly sorted; subrounded to rounded; yellowish 

brown (10YR 5/4); calcareous.

260 280 Sandy clayey silt (sM); silt with clay and very fine 

to medium sand; moderately to poorly sorted; 

yellowish brown (10YR 5/4); slightly calcareous.

280 300 Silty clayey sand (mS); very fine to fine sand with clay 

and silt; moderately to well sorted; subrounded to 

rounded; brown (10YR 5/3).

300 320 Silty clayey sand (mS); very fine to medium sand 

with clay and silt; moderately to poorly sorted; 

subrounded to rounded; brown (10YR 5/3); slightly 

calcareous.

320 340 Sandy clay (sC); clay with fine to coarse sand; 

moderately to poorly sorted; light gray (10YR 7/2); 

white clay.

340 360 Sandy clayey silt (sM); silt with clay and very 

fine to medium sand; moderately sorted; brown 

(10YR 5/3).

360 380 Clayey sandy silt (sM); silt with very fine to 

medium sand and clay; moderately sorted; brown 

(10YR 5/3).

380 400 Silty clayey sand (mS); very fine to medium sand 

with clay and silt; moderately sorted; subrounded to 

rounded; brown (10YR 5/3); calcareous.

400 420 Silty sand (zS); very fine to medium sand with silt; 

well to moderately sorted; subrounded to rounded; 

dark grayish brown (10YR 4/2).

420 440 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately to poorly sorted; light 

olive brown (2.5Y 5/3); calcareous.

Table 12B. Lithologic SIEVE log for multiple-well monitoring site CCT1 (15N/03E-25L1S, -25L2S, -25L3S).

[Altitude of land surface, approximately 2,688 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 8, 2011. Total depth drilled, 

903 feet. Screened intervals, 875–895, 730–750, and 645–665 feet.]
Tables 93

Depth

(feet) Description

From To

440 460 Sandy silt (sZ); silt with very fine to fine sand; 

well sorted; grayish brown (10YR 5/2); slightly 

calcareous.

460 480 Sandy clayey silt (sM); silt with clay and very 

fine to medium sand; moderately sorted; brown 

(10YR 5/3).

480 500 Clayey sandy silt (sM); silt with clay and very fine to 

medium sand; moderately sorted; grayish brown 

(10YR 5/2); calcareous.

500 520 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately sorted; grayish brown 

(10YR 5/2); calcareous.

520 540 Sandy clayey silt (sM); silt with clay and very fine to 

medium sand; moderately sorted; grayish brown 

(10YR 5/2); calcareous.

540 560 Silty sand (zS); very fine to medium sand with silt; 

well to moderately sorted; subrounded to rounded; 

brown (10YR 4/3).

560 580 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

580 600 Sandy silt (sZ); silt with very fine to medium sand; 

well to moderately sorted; brown (10YR 5/3); 

calcareous.

600 620 Sandy silt (sZ); silt with very fine to medium sand; 

well to moderately sorted; brown (10YR 5/3); 

calcareous.

620 640 Sandy silt (sZ); silt with very fine to medium sand; 

well to moderately sorted; brown (10YR 5/3).

640 660 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; subangular to 

subrounded; dark grayish brown (10YR 4/2).

660 680 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; brown (10YR 5/3); 

calcareous.

680 700 Silty sand (zS); fine to coarse sand with silt and trace 

granules; poorly sorted; subangular to subrounded; 

brown (10YR 5/3); calcareous.

Depth

(feet) Description

From To

700 720 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; grayish brown (10YR 5/2); slightly 

calcareous.

720 740 Silty sand (zS); fine to coarse sand with silt and trace 

granules to small pebbles; poorly sorted; subangular 

to subrounded; grayish brown (10YR 5/2); slightly 

calcareous.

740 760 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; brown (10YR 5/3); 

calcareous.

760 780 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; poorly sorted; subangular to 

subrounded; brown (10YR 5/3); calcareous.

780 800 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4); calcareous.

800 820 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3); calcareous.

820 840 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3); 

slightly calcareous.

840 860 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules; poorly sorted; 

subangular to subrounded; brown (10YR 4/3); 

slightly calcareous.

860 880 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3); 

slightly calcareous.

880 900 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3); slightly calcareous

900 903 No sample collected; cored interval.

Table 12B. Lithologic SIEVE log for multiple-well monitoring site CCT1 (15N/03E-25L1S, -25L2S, -25L3S).—Continued

[Altitude of land surface, approximately 2,688 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, August 8, 2011. Total depth drilled, 

903 feet. Screened intervals, 875–895, 730–750, and 645–665 feet.]
94 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

10 Gravelly sand (gS); coarse to very coarse sand and 

granules to medium pebbles; moderately sorted; 

subrounded to subangular; brown (10YR 5/3).

20 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately sorted; 

subrounded to subangular; brown (10YR 5/3).

30 Gravelly sand (gS); coarse to very coarse sand and 

granules to medium pebbles; moderately sorted; 

subrounded to subangular; brown (10YR 5/3).

40 Gravelly sand (gS); coarse to very coarse sand and 

granules; well sorted; subrounded to subangular; 

brown (10YR 5/3).

50 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately sorted; 

subrounded to subangular; brown (10YR 5/3).

60 Sandy silt (sZ); silt and very fine to very coarse sand; 

very poorly sorted; brown (10YR 5/3).

70 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and granules to small pebbles; very poorly sorted; 

subrounded to subangular; brown (10YR 5/3).

80 Clay (C); clay; very well sorted; brown (10YR 5/3).

90 Sandy silt (sZ); silt and fine to coarse sand; poorly sorted; 

brown (10YR 5/3).

100 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and granules; very poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

110 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and granules to small pebbles; very poorly sorted; 

subrounded to subangular; brown (10YR 5/3).

120 Gravelly sand (gS); medium to very coarse sand 

and granules; moderately sorted; subrounded to 

subangular; assorted colors.

130 Gravelly sand (gS); medium to very coarse sand 

and granules; moderately sorted; subrounded to 

subangular; assorted colors.

140 Gravelly sand (gS); medium to very coarse sand 

and granules; moderately sorted; subrounded to 

subangular; assorted colors.

150 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and granules; very poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

160 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; moderately sorted; subrounded to 

subangular; brown (10YR 5/3).

170 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; moderately sorted; subrounded to 

subangular; brown (10YR 5/3).

180 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; moderately sorted; subrounded to 

subangular; brown (10YR 5/3).

Depth 

(feet) Description

190 Slightly gravelly silty sand ((g)mS); medium to very 

coarse sand, silt, and minor granules; moderately 

sorted; subrounded to subangular; brown (10YR 5/3).

200 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and granules; very poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

210 Sandy clay (sC); clay and very coarse sand; moderately 

sorted; brown (10YR 5/3).

220 Gravelly silty sand (gmS); medium to very coarse 

sand, silt, and granules; poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

230 Gravelly clay (gM); clay and granules; well sorted; 

brown (10YR 5/3).

240 Clay (C); clay; very well sorted; brown (10YR 5/3).

250 Gravelly silty sand (gmS); medium to very coarse sand, 

silt, and granules; moderately sorted; subrounded to 

subangular; brown (10YR 5/3).

260 Silty sand (zS); medium to very coarse sand and silt; 

moderately sorted; subrounded to subangular; brown 

(10YR 5/3).

270 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

280 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

290 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

300 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

310 Sandy clay (sC); clay and coarse sand; moderately 

sorted; pale brown (10YR 6/3).

320 Sandy clay (sC); clay and medium to very coarse sand; 

moderately to poorly sorted; pale brown (10YR 6/3).

330 Sandy clay (sC); clay and medium to very coarse sand; 

moderately to poorly sorted; pale brown (10YR 6/3).

340 Sandy clay (sC); clay and medium to very coarse sand; 

moderately to poorly sorted; pale brown (10YR 6/3).

350 Sandy clay (sC); clay and fine to coarse sand; moderately 

to poorly sorted; brown (10YR 5/3).

360 Silty sand (zS); fine to very coarse sand and silt; poorly 

sorted; subrounded to subangular; brown (10YR 5/3).

370 Sandy silt (sZ); silt and medium to very coarse sand; 

moderately to poorly sorted; brown (10YR 5/3).

380 Sandy silt (sZ); silt and medium to very coarse sand; 

moderately to poorly sorted; brown (10YR 5/3).

390 Sandy clay (sC); clay and fine sand; well sorted; brown 

(10YR 5/3).

400 Clay (C); clay; very well sorted; brown (10YR 5/3).

410 Sandy clay (sC); clay and fine sand; well sorted; brown 

(10YR 5/3).

420 Sandy clay (sC); clay and coarse sand; well sorted; 

brown (10YR 5/3).

Table 13A. Lithologic SHAKER log for test well RDPS (15N/06E-33L1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 2,102 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, April 23, 2009. Total depth drilled, 

1,000 feet. Screened intervals, 520–700 and 420–440 feet.]
Tables 95

Depth 

(feet) Description

430 Sandy clay (sC); clay and coarse sand; well sorted; 

brown (10YR 5/3).

440 Sandy clay (sC); clay and coarse sand; well sorted; 

brown (10YR 5/3).

450 Sandy clay (sC); clay and very coarse sand; moderately 

sorted; brown (10YR 5/3).

460 Silty clay (M); clay and silt; very well sorted; dark 

yellowish brown (10YR 4/6).

470 Silty clay (M); clay and silt; very well sorted; dark 

yellowish brown (10YR 4/6).

480 Clay (C); clay; very well sorted; brown (10YR 5/3).

490 Clay (C); clay; very well sorted; brown (10YR 5/3).

500 Clay (C); clay; very well sorted; brown (10YR 5/3).

510 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

520 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

530 Clay (C); clay; very well sorted; brown (10YR 4/3).

540 Clay (C); clay; very well sorted; brown (10YR 4/3).

550 Clay (C); clay; very well sorted; brown (10YR 5/3).

560 Sandy clay (sC); clay and medium to coarse sand; 

moderately to poorly sorted; yellowish brown 

(10YR 5/4).

570 Sandy silt (sZ); silt and very fine to medium sand; 

moderately sorted; yellowish brown (10YR 5/4).

580 Sandy silt (sZ); silt and very fine to coarse sand; poorly 

sorted; yellowish brown (10YR 5/4).

590 Sandy clay (sC); clay and fine to coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4).

600 Sandy clay (sC); clay and coarse sand; moderately 

sorted; yellowish brown (10YR 5/4).

610 Sandy clay (sC); clay and coarse sand; moderately 

sorted; yellowish brown (10YR 5/4).

620 Clay (C); clay; very well sorted; grayish brown 

(10YR 5/2).

630 Clay (C); clay; very well sorted; grayish brown 

(10YR 5/2).

640 Clay (C); clay; very well sorted; grayish brown 

(10YR 5/2).

650 Clay (C); clay; very well sorted; grayish brown 

(10YR 5/2).

660 Clay (C); clay; very well sorted; brown (10YR 5/3).

670 Sandy silt (sZ); silt and very fine to coarse sand; poorly 

sorted; brown (10YR 5/3).

680 Sandy silt (sZ); silt and very fine to coarse sand; poorly 

sorted; brown (10YR 5/3).

690 Clay (C); clay; very well sorted; yellowish brown 

(10YR 5/4).

700 Clay (C); clay; very well sorted; yellowish brown 

(10YR 5/4).

710 Clay (C); clay; very well sorted; yellowish brown 

(10YR 5/4).

Depth 

(feet) Description

720 Clay (C); clay; very well sorted; yellowish brown 

(10YR 5/4).

730 Silt (Z); silt; very well sorted; yellowish brown 

(10YR 5/4).

740 Sandy clay (sC); clay and very coarse sand; moderately 

to poorly sorted; yellowish brown (10YR 5/4).

750 Clayey silt (M); silt and clay; well to very well sorted; 

yellowish brown (10YR 5/4).

760 Sandy clay (sC); clay and coarse sand; moderately 

sorted; yellowish brown (10YR 5/4).

770 Sandy clay (sC); clay and coarse sand; moderately 

sorted; yellowish brown (10YR 5/4).

780 Sandy clay (sC); clay and coarse to very coarse sand; 

moderately sorted; yellowish brown (10YR 5/4).

790 Clay (C); clay; very well sorted; brown (10YR 5/3).

800 Sandy silt (sZ); silt and coarse to very coarse sand; 

moderately sorted; brown (10YR 5/3).

810 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

820 Sandy clay (sC); clay and coarse sand; moderately 

sorted; brown (10YR 5/3).

830 Clay (C); clay; very well sorted; brown (10YR 5/3).

840 Silty clay (M); clay and silt; well to very well sorted; 

brown (10YR 5/3).

850 Sandy clay (sC); clay and fine to medium sand; 

moderately to well sorted; brown (10YR 5/3).

860 Clay (C); clay; very well sorted; brown (10YR 5/3).

870 Clay (C); clay; very well sorted; brown (10YR 5/3).

880 Clay (C); clay; very well sorted; brown (10YR 5/3).

890 Sandy clay (sC); clay and medium sand; moderately to 

well sorted; brown (10YR 5/3).

900 Sandy clay (sC); clay and medium sand; moderately to 

well sorted; brown (10YR 5/3).

910 Sandy clay (sC); clay and medium sand; moderately to 

well sorted; brown (10YR 5/3).

920 Sandy clay (sC); clay and medium sand; moderately to 

well sorted; brown (10YR 5/3).

930 Sandy clay (sC); clay and medium sand; moderately to 

well sorted; brown (10YR 5/3).

940 Sandy silt (sZ); silt and very fine to medium sand; 

moderately sorted; brown (10YR 5/3).

950 Sandy silt (sZ); silt and very fine to medium sand; 

moderately sorted; brown (10YR 5/3).

960 Sandy silt (sZ); silt and very fine to medium sand; 

moderately sorted; brown (10YR 5/3).

970 No sample collected.

980 No sample collected.

990 No sample collected.

1,000 No sample collected.

Table 13A. Lithologic SHAKER log for test well RDPS (15N/06E-33L1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 2,102 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, April 23, 2009. Total depth drilled, 

1,000 feet. Screened intervals, 520–700 and 420–440 feet.]
96 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 20 Sand (S); fine to very coarse sand with minor granules; 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4).

20 40 Sand (S); fine to coarse sand with trace granules to 

pebbles <10 mm; moderately to poorly sorted; 

subangular to subrounded; yellowish brown 

(10YR 5/4).

40 60 Sand (S); fine to coarse sand with trace granules to 

pebbles <12 mm; moderately to poorly sorted; 

subangular to subrounded; yellowish brown 

(10YR 5/4).

60 80 Silty sand (zS); very fine to very coarse sand, silt 

and trace granules to pebbles <7 mm; poorly 

sorted; subangular to subrounded; brown 

(7.5YR 5/4 to 4/4).

80 100 Silty sand (zS); very fine to very coarse sand and silt; 

poorly sorted; subangular to subrounded; brown 

(7.5YR 5/4 to 4/4).

100 120 Sand (S); very fine to very coarse sand and trace 

granules; poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/9).

120 140 Sand (S); very fine to coarse sand and trace granules; 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/9).

140 160 Sand (S); very fine to coarse sand and trace granules; 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/9).

160 180 Sand (S); very fine to coarse sand and trace granules; 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/9).

180 200 Clayey sand (cS); very fine to very coarse sand and 

clay; poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/9).

200 220 Clayey sand (cS); very fine to very coarse sand and 

clay; poorly sorted; subangular to subrounded; 

brown (10YR 5/3).

220 240 Clay (C); clay with minor very fine to fine sand; well 

sorted; brown (10YR 5/3).

Depth

(feet) Description

From To

240 260 Sand (S); very fine to coarse sand and minor clay; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

260 280 Clayey sand (cS); fine to medium sand and clay; 

moderately sorted; subangular to subrounded; 

brown (10YR 5/3).

280 300 Sand (S); very fine to very coarse sand; poorly sorted; 

brown (10YR 5/3).

300 320 Clayey sand (cS); very fine to medium sand and 

clay; moderately to poorly sorted; subangular to 

subrounded; pale brown (10YR 6/3).

320 340 Sand (S); very fine to coarse sand; moderately to 

poorly sorted; subangular to subrounded; pale 

brown (10YR 6/3).

340 360 Sand (S); very fine to coarse sand; moderately to 

poorly sorted; subangular to subrounded; pale 

brown (10YR 6/3).

360 380 Clayey sand (cS); fine to coarse sand and clay; 

moderately sorted; subangular to subrounded; pale 

brown (10YR 6/3).

380 400 Clayey sand (cS); fine to coarse sand and clay; 

moderately to poorly sorted; subangular to 

subrounded; brown (7.5YR 5/3).

400 420 Sand (S); fine to coarse sand; well to moderately 

sorted; subangular to subrounded; brown 

(7.5YR 5/3).

420 440 Silty sand (zS); very fine to very coarse sand and silt; 

poorly sorted; subangular to subrounded; brown 

(7.5YR 5/3).

440 460 Clayey sand (cS); very fine to medium sand and clay; 

moderately sorted; subangular to subrounded; 

brown (7.5YR 5/3).

460 480 Clayey sand (cS); very fine to medium sand and clay; 

moderately sorted; subangular to subrounded; 

brown (7.5YR 5/3).

480 500 Clayey sand (cS); very fine to medium sand and clay; 

moderately sorted; subangular to subrounded; 

brown (7.5YR 5/3).

Table 13B. Lithologic SIEVE log for test well RDPS (15N/06E-33L1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 2,102 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, April 23, 2009. Total depth drilled, 

1,000 feet. Screened intervals, 520–700 and 420–440 feet. Abbreviations: mm, millimeter; <, less than]
Tables 97

Depth

(feet) Description

From To

500 520 Clay (C); clay with minor very fine to medium sand; 

well sorted; brown (7.5YR 5/3).

520 540 Clayey sand (cS); very fine to medium sand and 

clay; moderately to poorly sorted; subangular to 

subrounded; brown (7.5YR 4/3).

540 560 Clayey sand (cS); very fine to very coarse sand and 

clay; poorly sorted; subangular to subrounded; 

brown (7.5YR 5/3).

560 580 Silty sand (zS); very fine to very coarse sand, silt, 

and trace granules; poorly sorted; subangular to 

subrounded; brown (7.5YR 5/3).

580 600 Sand (S); very fine to coarse sand; poorly sorted; 

subangular to subrounded; brown (7.5YR 5/3).

600 620 Sand (S); very fine to coarse sand with minor 

clay; poorly to moderately sorted; subangular to 

subrounded; brown (10YR 5/3).

620 640 Clayey sand (cS); very fine to very coarse sand and 

clay; poorly sorted; subangular to subrounded; 

brown (10YR 5/3).

640 660 Sand (S); fine to coarse sand with minor silt; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

660 680 Sand (S); very fine to very coarse sand and minor 

silt; moderately to poorly sorted; subangular to 

subrounded; brown (7.5YR 5/3).

680 700 Sand (S); very fine to fine sand and minor silt; 

well sorted; subangular to subrounded; brown 

(7.5YR 4/4).

700 720 Clayey silty sand (mS); very fine to fine sand with silt 

and clay; moderately to well sorted; subangular to 

subrounded; brown (7.5YR 4/4).

720 740 Clayey sand (cS); very fine to fine sand and 

clay; moderately to well sorted; subangular to 

subrounded; brown (7.5YR 4/4).

740 760 Clayey sand (cS); very fine to fine sand and 

clay; moderately to well sorted; subangular to 

subrounded; brown (7.5YR 4/4).

Depth

(feet) Description

From To

760 780 Clayey sand (cS); very fine to fine sand and 

clay; moderately to well sorted; subangular to 

subrounded; brown (7.5YR 4/4).

780 800 Clayey silty sand (mS); very fine to course sand, silt, 

and clay; poorly sorted; subangular to rounded; 

brown (7.5YR 4/3).

800 820 Clayey silty sand (mS); very fine to course sand, silt, 

and clay; poorly sorted; subangular to rounded; 

brown (7.5YR 4/3).

820 840 Clayey sand (cS); very fine to fine sand and 

clay; moderately to well sorted; subangular to 

subrounded; brown (10YR 5/3).

840 860 Clayey sand (cS); very fine to fine sand and 

clay; moderately to well sorted; subangular to 

subrounded; brown (10YR 5/3).

860 880 Clayey sand (cS); very fine to fine sand and 

clay; moderately to well sorted; subangular to 

subrounded; brown (10YR 5/3).

880 900 Sand (S); very fine to fine sand and minor clay; 

well sorted; subangular to subrounded; brown 

(10YR 5/3).

900 920 Sand (S); very fine to coarse sand and minor clay; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

920 940 Sand (S); very fine to coarse sand and minor clay; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

940 960 Sand (S); fine to medium sand with minor clay; 

well sorted; subangular to subrounded; brown 

(10YR 5/3).

960 980 Silty sand (zS); very fine to medium sand and silt; 

moderately sorted; subangular to subrounded; 

brown (10YR 5/3).

980 1,000 Sand (S); very fine to coarse sand; moderately to 

poorly sorted; subangular to subrounded; brown 

(10YR 5/3).

Table 13B. Lithologic SIEVE log for test well RDPS (15N/06E-33L1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 2,102 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, April 23, 2009. Total depth drilled, 

1,000 feet. Screened intervals, 520–700 and 420–440 feet. Abbreviation: mm, millimeter; <, less than]
98 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

10 Gravel (G); granules to very large pebbles with trace 

very coarse sand; very poorly sorted; very angular to 

rounded; brown (10YR 4/3); calcareous.

20 Gravel (G); granules to large pebbles with minor very 

coarse sand; very poorly sorted; very angular to 

rounded; brown (10YR 4/3); calcareous.

30 Gravel (G); granules to large pebbles with minor medium 

to very coarse sand; very poorly sorted; very angular 

to subrounded; dark yellowish brown (10YR 4/4).

40 Gravel (G); granules to very large pebbles with 

minor clay and medium to very coarse sand; very 

poorly sorted; very angular to subrounded; brown 

(7.5YR 5/3).

50 Gravel (G); granules to large pebbles with minor 

very coarse sand; very poorly sorted; angular to 

subrounded; light brown (7.5YR 6/4).

60 Gravel (G); granules to very large pebbles with minor 

very coarse sand; very poorly sorted; angular to 

subrounded; very dark gray (7.5YR 3/1).

70 Gravel (G); granules to very large pebbles with minor 

coarse to very coarse sand; very poorly sorted; angular 

to rounded; dark grayish brown (10YR 4/2).

80 Gravel (G); granules to very large pebbles with minor 

coarse to very coarse sand; very poorly sorted; angular 

to rounded; yellowish brown (10YR 5/4).

90 Gravel (G); granules to very large pebbles with minor 

coarse to very coarse sand; very poorly sorted; angular 

to subrounded; brown (10YR 4/3).

100 Gravel (G); granules to large pebbles with minor very 

coarse sand; very poorly sorted; angular to rounded; 

dark brown (7.5YR 3/2).

110 Gravel (G); granules to large pebbles with minor 

very coarse sand; very poorly sorted; angular to 

subrounded; brown (7.5YR 5/2).

120 Gravel (G); granules to large pebbles with minor 

very coarse sand; very poorly sorted; angular to 

subrounded; very dark gray (5YR 3/1).

130 Gravel (G); granules to large pebbles with minor coarse 

to very coarse sand; very poorly sorted; angular to 

subrounded; dark gray (10YR 4/1).

140 Gravel (G); granules to large pebbles with minor coarse 

to very coarse sand; very poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

150 Gravel (G); granules to large pebbles with trace medium 

to very coarse sand; very poorly sorted; very angular 

to subangular; dark grayish brown (10YR 4/2).

160 Gravel (G); granules to large pebbles; very poorly sorted; 

angular to subrounded; dark reddish gray (5YR 4/2).

Depth 

(feet) Description

170 Gravel (G); granules to large pebbles with minor medium 

to very coarse sand; very poorly sorted; angular to 

subangular; brown (7.5YR 4/2).

180 Gravel (G); granules to large pebbles with minor coarse 

to very coarse sand; very poorly sorted; very angular 

to subangular; brown (7.5YR 4/3).

190 Gravel (G); granules to large pebbles with minor coarse 

to very coarse sand; very poorly sorted; angular; dark 

grayish brown (10YR 4/2).

200 Gravel (G); granules to medium pebbles with minor 

medium to very coarse sand; poorly to very poorly 

sorted; angular to subangular; grayish brown 

(10YR 5/2).

210 Gravel (G); granules to large pebbles with trace very 

coarse sand; moderately to poorly sorted; angular; dark 

grayish brown (10YR 4/2).

220 Gravel (G); granules to large pebbles with trace very 

coarse sand; very poorly sorted; angular to subangular; 

dark gray (10YR 4/1).

230 Gravel (G); granules to large pebbles with trace medium 

to very coarse sand; moderately to poorly sorted; 

angular to subrounded; grayish brown (10YR 5/2).

240 Gravel (G); granules to large pebbles with trace medium 

to very coarse sand; moderately to poorly sorted; 

angular to subangular; brown (7.5YR 5/2).

250 Gravel (G); granules to large pebbles with trace medium 

to very coarse sand; poorly to very poorly sorted; 

angular to subrounded; brown (7.5YR 5/2).

260 Gravel (G); granules to large pebbles with trace clay 

and medium to very coarse sand; very poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

270 Gravel (G); granules to large pebbles with minor clay 

and medium to very coarse sand; very poorly sorted; 

angular to subangular; brown (7.5YR 5/4).

280 Gravel (G); granules to medium pebbles with minor clay 

and trace medium to very coarse sand; very poorly 

sorted; angular to subrounded; brown (7.5YR 5/3).

290 Gravel (G); granules to large pebbles with minor clay 

and medium to very coarse sand; poorly to very poorly 

sorted; angular to subangular; brown (7.5YR 5/3).

300 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; angular; brown (7.5YR 5/3).

310 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; very poorly sorted; 

angular to subangular; brown (7.5YR 5/3).

320 Gravel (G); granules to large pebbles with minor clay 

and fine to very coarse sand; very poorly sorted; very 

angular to angular; light brown (7.5YR 6/3).

Table 14A. Lithologic SHAKER log for test well NELT5 (16N/01E-35P1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,243 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 20, 2012. Total depth drilled, 

905 feet. Screened intervals, 820–840, 640–780 and 480–520 feet.]
Tables 99

Depth 

(feet) Description

330 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; very poorly sorted; very 

angular to subangular; brown (7.5YR 5/3).

340 Gravel (G); granules to large pebbles with minor clay and 

fine to very coarse sand; very poorly sorted; angular; 

brown (7.5YR 5/3).

350 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; very poorly sorted; 

angular; brown (7.5YR 5/3).

360 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; very poorly sorted; 

angular; brown (7.5YR 5/3).

370 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; very poorly sorted; 

angular; brown (7.5YR 5/3).

380 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; very poorly sorted; 

angular; brown (7.5YR 5/2).

390 Clayey gravel (mG); granules to medium pebbles with 

clay and minor fine to very coarse sand; very poorly 

sorted; angular; brown (7.5YR 5/2).

400 Gravel (G); granules to large pebbles with clay and minor 

fine to very coarse sand; very poorly sorted; angular; 

brown (7.5YR 5/2).

404 Gravel (G); very large pebbles to cobbles with boulders; 

very poorly sorted; rounded; dusky red (2.5YR 3/2); 

rhyo-dacite to andesite cobbles (aphanitic with 

subhedral to anhedral quartz).

1C shoe

410 Gravel (G); granules to medium pebbles with trace clay 

and very coarse sand; poorly sorted; angular; brown 

(7.5YR 5/3).

420 Clayey gravel (mG); granules to medium pebbles with 

clay and minor fine to very coarse sand; very poorly 

sorted; angular; brown (7.5YR 5/2).

430 Clayey gravel (mG); granules to medium pebbles 

with clay and minor fine to very coarse sand; very 

poorly sorted; angular to subangular; pinkish gray 

(7.5YR 6/2).

440 Clayey gravel (mG); granules to medium pebbles with 

clay and minor fine to very coarse sand; very poorly 

sorted; angular; light brown (7.5YR 6/3).

450 Clayey gravel (mG); granules to small pebbles with clay 

and minor fine to very coarse sand; very poorly sorted; 

angular; pinkish gray (7.5YR 6/2).

460 Gravel (G); granules to medium pebbles with clay and 

minor fine to very coarse sand; very poorly sorted; 

angular; brown (7.5YR 5/2).

470 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; moderately to very poorly 

sorted; angular; brown (7.5YR 5/2).

Depth 

(feet) Description

480 Gravel (G); granules to very large pebbles with minor 

clay and fine to very coarse sand; poorly to very poorly 

sorted; angular to subangular; brown (7.5YR 5/3).

490 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; moderately to very poorly 

sorted; angular; brown (7.5YR 5/2).

500 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; angular; brown (7.5YR 5/3).

510 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; angular; brown (7.5YR 5/3).

520 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; angular; brown (7.5YR 5/2).

530 Gravel (G); granules to small pebbles with minor fine 

to very coarse sand and clay; poorly to very poorly 

sorted; angular; grayish brown (10YR 5/2).

540 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; angular; brown (10YR 5/3).

550 Gravel (G); granules to medium pebbles with minor very 

coarse sand; poorly to very poorly sorted; angular; 

dark grayish brown (10YR 4/2).

560 Gravel (G); granules to medium pebbles with minor 

medium to very coarse sand and trace clay; poorly 

to very poorly sorted; angular; grayish brown 

(10YR 5/2).

570 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; angular; grayish brown (10YR 5/2).

580 Clayey gravel (mG); granules to medium pebbles with 

clay and minor fine to coarse sand; very poorly sorted; 

angular; brown (10YR 5/3).

590 Gravel (G); granules to small pebbles with minor 

medium to very coarse sand and trace clay; poorly 

to very poorly sorted; angular to subangular; grayish 

brown (10YR 5/2).

600 Gravel (G); granules to small pebbles with minor fine 

to very coarse sand and clay; poorly to very poorly 

sorted; angular; grayish brown (10YR 5/2).

610 Sandy gravel (sG); granules with medium to very coarse 

sand and trace clay; poorly to very poorly sorted; 

angular; grayish brown (10YR 5/2).

620 Sandy gravel (sG); granules to small pebbles with fine 

to very coarse sand and minor clay; poorly sorted; 

angular; grayish brown (10YR 5/2).

624 No recovery.

2C shoe

Table 14A. Lithologic SHAKER log for test well NELT5 (16N/01E-35P1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,243 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 20, 2012. Total depth drilled, 

905 feet. Screened intervals, 820–840, 640–780 and 480–520 feet.]
100 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

630 Gravel (G); granules to medium pebbles; moderately 

to poorly sorted; angular to subangular; dark gray 

(10YR 4/1).

640 Gravel (G); granules to very large pebbles with trace 

very coarse sand; poorly sorted; angular to subangular; 

grayish brown (10YR 5/2); cobble fragments.

650 Gravel (G); granules to very large pebbles with minor 

clay and fine to very coarse sand; poorly to very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

660 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; poorly to very 

poorly sorted; angular to subrounded; grayish brown 

(10YR 5/2).

670 Gravel (G); granules to medium pebbles with minor 

clay and fine to very coarse sand; poorly to very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

680 Clayey gravel (mG); granules to medium pebbles with 

clay and minor fine to very coarse sand; very poorly 

sorted; angular to subangular; brown (10YR 5/3).

690 Gravel (G); granules to medium pebbles with minor clay 

and fine to very coarse sand; poorly to very poorly 

sorted; very angular to subangular; brown (10YR 5/3).

700 Clayey gravel (mG); granules to medium pebbles with 

clay and minor fine to very coarse sand; very poorly 

sorted; very angular to subangular; brown (10YR 5/3).

710 Clayey gravel (mG); granules to small pebbles with clay 

and minor fine to very coarse sand; very poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

720 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subangular; grayish brown 

(10YR 5/2).

730 Clayey sandy gravel (msG); granules to large pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subangular; grayish brown 

(10YR 5/2).

740 Clayey sandy gravel (msG); granules to medium pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subangular; brown (10YR 5/3).

750 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subangular; grayish brown 

(10YR 5/2).

760 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subangular; grayish brown 

(10YR 5/2).

Depth 

(feet) Description

770 Clayey sandy gravel (msG); granules to small pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subangular; grayish brown 

(10YR 5/2).

780 Clayey sandy gravel (msG); granules to medium 

pebbles with fine to very coarse sand and clay; very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

790 Clayey gravel (mG); granules to medium pebbles 

with clay and minor fine to very coarse sand; very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

800 Clayey sandy gravel (msG); granules with fine to very 

coarse sand and clay; very poorly sorted; angular to 

subangular; grayish brown (10YR 5/2).

810 Clayey sandy gravel (msG); granules with fine to very 

coarse sand and clay; very poorly sorted; angular to 

subangular; grayish brown (10YR 5/2).

820 Gravelly clayey sand (gmS); fine to very coarse sand 

with clay and granules; very poorly sorted; subangular 

to rounded; grayish brown (10YR 5/2).

830 Gravelly clayey sand (gmS); fine to very coarse sand 

with clay and granules; very poorly sorted; angular to 

subangular; brown (10YR 5/3).

840 Gravelly clayey sand (gmS); fine to very coarse sand 

with clay and granules; very poorly sorted; angular to 

subangular; brown (10YR 5/3).

850 Gravelly clayey sand (gmS); fine to very coarse sand 

with clay and granules; very poorly sorted; angular to 

subangular; brown (10YR 4/3).

860 Gravelly sand (gS); medium to very coarse sand with 

granules and minor clay; poorly sorted; angular to 

subangular; brown (10YR 5/3).

870 Slightly gravelly sand ((g)S); coarse to very coarse sand 

with granules and minor clay; moderately to well 

sorted; angular; grayish brown (10YR 5/2).

880 Gravelly sand (gS); coarse to very coarse sand with 

granules; well sorted; angular; grayish brown 

(10YR 5/2).

890 Gravelly sand (gS); coarse to very coarse sand with 

granules to medium pebbles; moderately to well 

sorted; angular; grayish brown (10YR 5/2).

900 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles and minor clay; moderately 

to well sorted; angular to rounded; grayish brown 

(10YR 5/2).

905 No recovery.

3C shoe

Table 14A. Lithologic SHAKER log for test well NELT5 (16N/01E-35P1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,243 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 20, 2012. Total depth drilled, 

905 feet. Screened intervals, 820–840, 640–780 and 480–520 feet.]
Tables 101

Depth

(feet) Description

From To

0 20 Gravelly silty sand (gmS); fine to coarse sand 

with silt and granules to small pebbles; poorly 

sorted; subangular to angular; brown (10YR 4/3); 

calcareous.

20 40 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to small pebbles; poorly sorted; 

subangular to angular; dark yellowish brown 

(10YR 4/4); trace mica.

40 60 Gravelly silty sand (gmS); medium to very coarse 

sand with granules to large pebbles, silt, and trace 

clay; very poorly sorted; angular to subrounded; 

dark yellowish brown (10YR 4/4).

60 80 Gravelly silty sand (gmS); medium to very coarse 

sand with granules to large pebbles and silt; poorly 

sorted; subrounded to angular; brown (10YR 4/3).

80 100 Gravelly silty sand (gmS); medium to very coarse 

sand with granules to large pebbles and silt; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

100 120 Gravelly sand (gS); medium to very coarse sand with 

granules to large pebbles; moderately to poorly 

sorted; subrounded to angular; brown (10YR 4/3).

120 140 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately to poorly 

sorted; subrounded to angular; brown (10YR 4/3).

140 160 Silty gravelly sand (gmS); fine to coarse sand with 

granules to medium pebbles and silt; poorly sorted; 

subrounded to subangular; brown (10YR 4/3); trace 

mica.

160 180 Silty gravelly sand (gmS); fine to coarse sand with 

granules and silt; moderately to poorly sorted; 

subrounded to subangular; brown (10YR 4/3); trace 

mica.

180 200 Silty gravelly sand (gmS); fine to coarse sand with 

granules to small pebbles and silt; poorly sorted; 

subrounded to subangular; brown (10YR 4/3); trace 

mica.

200 220 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to medium pebbles; poorly sorted; 

subrounded to angular; brown (10YR 4/3).

220 240 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to small pebbles; poorly sorted; 

rounded to subangular; dark brown (10YR 3/3).

Depth

(feet) Description

From To

240 260 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to small pebbles; poorly sorted; 

subrounded to angular; brown (10YR 4/3); trace 

mica.

260 280 Gravelly silty sand (gmS); fine to coarse sand with 

granules to medium pebbles and silt; poorly sorted; 

subrounded to angular; brown (10YR 4/3).

280 300 Silty sand (zS); very fine to medium sand with silt 

and trace granules to small pebbles; moderately 

to poorly sorted; rounded to subangular; brown 

(10YR 4/3); trace mica.

300 320 Silty sand (zS); very fine to medium sand with silt 

and trace granules; moderately to poorly sorted; 

subrounded to subangular; brown (10YR 4/3).

320 340 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to medium pebbles; poorly sorted; 

angular to subrounded; brown (10YR 4/3).

340 360 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to small pebbles; poorly sorted; 

subrounded to angular; brown (10YR 4/3).

360 380 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subrounded to angular; brown (10YR 4/3).

380 400 Gravelly silty clayey sand (gmS); fine to coarse sand, 

silt, and clay with granules; very poorly sorted; 

subrounded to angular; brown (10YR 5/3).

400 404 No sample collected; cored interval.

404 420 Silty sand (zS); fine to coarse sand with silt and trace 

clay; moderately sorted; angular to subrounded; 

brown (10YR 4/3).

420 440 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately 

sorted; subangular to angular; dark grayish brown 

(10YR 4/2); trace mica.

440 460 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; well to moderately 

sorted; subangular to angular; dark grayish brown 

(10YR 4/2); trace mica.

460 480 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to angular; brown (10YR 4/3); trace 

mica.

Table 14B. Lithologic SIEVE log for test well NELT5 (16N/01E-35P1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,243 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 20, 2012. Total depth drilled, 

905 feet. Screened intervals, 820–840, 640–780 and 480–520 feet.]
102 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

480 500 Gravelly sand (gS); fine to coarse sand with granules 

to small pebbles and trace silt; moderately to poorly 

sorted; subangular to angular; brown (10YR 4/3); 

trace mica.

500 520 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

to poorly sorted; subangular to angular; brown 

(10YR 4/3); trace mica.

520 540 Sand (S); medium to very coarse sand with trace 

granules and trace silt; well to moderately sorted; 

subangular to angular; dark grayish brown 

(10YR 4/2).

540 560 Sand (S); medium to very coarse sand with trace 

granules and trace silt; well to moderately sorted; 

angular to subrounded; brown (10YR 4/3).

560 580 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules; poorly sorted; angular 

to subangular; brown (10YR 4/3).

580 600 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark grayish brown 

(10YR 4/2); trace mica.

600 620 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark grayish brown 

(10YR 4/2).

620 624 No sample collected; cored interval.

624 640 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3).

640 660 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3); 

trace mica.

660 680 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark grayish brown 

(10YR 4/2); micaceous.

680 700 Gravelly silty sand (gmS); fine to coarse sand 

with silt and granules to small pebbles; poorly 

sorted; subangular to angular; brown (10YR 4/3); 

micaceous.

Depth

(feet) Description

From To

700 720 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular 

to subangular; dark grayish brown (10YR 4/2); 

micaceous.

720 740 Silty sand (zS); fine to coarse sand with silt; 

moderately sorted; angular to subangular; brown 

(10YR 4/3); micaceous.

740 760 Silty sand (zS); fine to coarse sand with silt; 

moderately sorted; angular to subrounded; brown 

(10YR 4/3); micaceous.

760 780 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately sorted; angular to subangular; 

brown (10YR 4/3); trace mica.

780 800 Sand (S); fine to coarse sand with trace very coarse 

sand and silt; moderately sorted; angular to 

subangular; dark grayish brown (10YR 4/2); 

micaceous.

800 820 Silty sand (zS); fine to coarse sand with silt; 

moderately sorted; angular to subangular; dark 

grayish brown (10YR 4/2); micaceous.

820 840 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately sorted; angular to 

subangular; brown (10YR 4/3); micaceous.

840 860 Silty sand (zS); fine to coarse sand with silt; 

moderately sorted; angular to subangular; dark 

grayish brown (10YR 4/2); micaceous.

860 880 Silty sand (zS); fine to medium sand with silt and trace 

very coarse sand; well to moderately sorted; angular 

to subangular; dark grayish brown (10YR 4/2); 

micaceous.

880 900 Silty sand (zS); fine to medium sand with silt and trace 

very coarse sand; well to moderately sorted; angular 

to subangular; dark grayish brown (10YR 4/2); 

micaceous.

900 905 No sample collected; cored interval.

Table 14B. Lithologic SIEVE log for test well NELT5 (16N/01E-35P1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,243 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 20, 2012. Total depth drilled, 

905 feet. Screened intervals, 820–840, 640–780 and 480–520 feet.]
Tables 103

Depth 

(feet) Description

10 Sandy gravel (sG); granules to medium pebbles and 

coarse to very coarse sand with trace large to very 

large pebbles; poorly sorted; angular to subrounded; 

brown (10YR 4/3); slightly calcareous.

20 Sandy gravel (sG); granules to medium pebbles 

and medium to very coarse sand with trace large 

pebbles; poorly sorted; angular to subangular; brown 

(10YR 4/3); slightly calcareous.

30 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

angular to very angular; dark yellowish brown 

(10YR 4/4); slightly calcareous.

40 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4); 

slightly calcareous.

50 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay, granules to small pebbles, and trace 

silt; very poorly sorted; angular to subrounded; dark 

yellowish brown (10YR 4/4).

60 Clayey sandy gravel (msG); granules to large pebbles 

with fine to very coarse sand and clay; very poorly 

sorted; angular to subrounded; yellowish brown 

(10YR 5/4); calcareous.

70 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay, granules to small pebbles, and trace 

silt; very poorly sorted; angular to subangular; dark 

yellowish brown (10YR 4/4).

80 Gravelly sand (gS); medium to very coarse sand with 

granules to large pebbles and trace silt and clay; 

very poorly sorted; angular to subrounded; brown 

(10YR 4/3).

90 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; poorly to 

very poorly sorted; angular to subrounded; brown 

(10YR 5/3); calcareous.

100 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly to 

very poorly sorted; angular to subrounded; yellowish 

brown (10YR 5/4).

110 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; poorly sorted; angular to 

subangular; dark brown (10YR 3/3).

120 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace silt; poorly 

sorted; angular to subrounded; brown (10YR 4/3).

130 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately to poorly 

sorted; angular to subrounded; brown (10YR 4/3).

Depth 

(feet) Description

140 Gravelly sand (gS); very fine to very coarse sand, 

granules to small pebbles, and trace silt; very poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

150 Silty sand (zS); fine to coarse sand with silt and 

trace clay; moderately to poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

160 Sand (S); fine to very coarse sand and trace granules; 

moderately sorted; subangular to rounded; brown 

(10YR 5/3).

170 Sand (S); fine to coarse sand with trace granules to small 

pebbles; moderately sorted; angular to subangular; 

dark yellowish brown (10YR 4/4).

180 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace very fine to 

fine sand; moderately to poorly sorted; angular to 

subrounded; brown (10YR 4/3); mafic gravel.

190 Sand (S); medium to very coarse sand with trace granules 

and silt; moderately to poorly sorted; angular to 

subrounded; brown (10YR 5/3).

200 Sand (S); medium to very coarse sand with trace granules 

and silt; moderately to poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4).

210 Sand (S); fine to coarse sand with trace granules and silt; 

moderately to poorly sorted; angular to subangular; 

brown (10YR 5/3); slightly calcareous.

220 Gravelly sand (gS); fine to coarse sand with granules to 

small pebbles and trace silt; poorly sorted; angular to 

subangular; brown (10YR 5/3).

230 Sand (S); fine to coarse sand with trace granules and silt; 

moderately to poorly sorted; angular to subangular; 

brown (10YR 5/3).

240 Gravelly silty sand (gmS); fine to coarse sand with silt, 

granules, and trace clay; poorly sorted; angular to 

subrounded; yellowish brown (10YR 5/4).

250 Gravelly silty sand (gmS); fine to coarse sand with silt, 

granules, and trace clay; poorly sorted; subangular to 

subrounded; yellowish brown (10YR 5/4); slightly 

micaceous.

260 Gravelly clayey sand (gmS); fine to coarse sand with 

clay, granules to small pebbles, and trace silt; poorly 

sorted; angular to subangular; brown (10YR 5/3).

270 Gravelly clayey sand (gmS); fine to coarse sand with 

clay, granules, and trace silt; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4); slightly 

micaceous.

280 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay, granules, and trace silt; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4); 

slightly micaceous.

Table 15A. Lithologic SHAKER log for multiple-well monitoring site NELT7 (16N/02E-16P1S, -16P2S, -16P3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,172 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 865 feet. Screened intervals, 780–800, 620–640, and 380–400 feet.]
104 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

283 Clayey silty sand (mS); very fine to medium sand 

with silt and clay; moderately sorted; subangular to 

subrounded; yellowish brown (10YR 5/4); micaceous.

1C bottom

290 Clayey silty gravelly sand (gmS); medium to coarse 

sand with granules to small pebbles, silt, and clay; 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

300 Clayey silty gravelly sand (gmS); fine to coarse sand 

with granules, silt, and clay; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4); slightly 

micaceous.

310 Clayey sand (cS); fine to coarse sand with clay and 

trace granules; poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4).

320 Clayey sand (cS); fine to coarse sand with clay and 

trace granules; poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4).

330 Silty clayey sand (mS); fine to coarse sand with clay 

and silt; moderately to poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

340 Silty sand (zS); medium to very coarse sand with silt; 

well to moderately sorted; angular to subangular; 

brown (10YR 5/3).

350 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subangular; brown (10YR 5/3).

360 Silty sand (zS); fine to coarse sand with silt; well to 

moderately sorted; angular to subrounded; brown 

(10YR 5/3).

370 Silty sand (zS); fine to coarse sand with silt; well to 

moderately sorted; subangular to subrounded; brown 

(10YR 5/3); white sand.

380 Silty sand (zS); fine to coarse sand with silt; well to 

moderately sorted; subangular to subrounded; brown 

(10YR 5/3).

390 Silty sand (zS); very fine to medium sand with silt; well 

sorted; angular to subrounded; brown (10YR 5/3).

400 Silty sand (zS); fine to coarse sand with silt; well to 

moderately sorted; subangular to subrounded; dark 

grayish brown (10YR 4/2).

410 Silty sand (zS); very fine to medium sand with silt; 

well to moderately sorted; subangular to subrounded; 

brown (10YR 5/3).

420 Silty sand (zS); fine to coarse sand with silt; well to 

moderately sorted; angular to subrounded; brown 

(10YR 5/3).

430 Silty sand (zS); fine to medium sand with silt; well 

sorted; angular to subangular; dark grayish brown 

(10YR 4/2).

Depth 

(feet) Description

440 Silty sand (zS); very fine to medium sand with silt; 

well sorted; angular to subrounded; grayish brown 

(10YR 5/2).

450 Silty sand (zS); very fine to medium sand with silt; 

well sorted; angular to subrounded; grayish brown 

(10YR 5/2).

460 Sandy clayey silt (sM); silt and clay with very fine to 

medium sand; moderately to well sorted; light olive 

brown (2.5Y 5/3).

470 Sandy clay (sC); clay with very fine to medium sand; 

well sorted; yellowish brown (10YR 5/4).

480 Sandy clay (sC); clay with very fine to medium sand; 

well sorted; brown (10YR 5/3).

490 Sandy clay (sC); clay with very fine to medium sand and 

trace coarse sand; well to moderately sorted; yellowish 

brown (10YR 5/4).

500 Sandy clay (sC); clay with fine to medium sand; 

well sorted; light olive brown (2.5Y 5/3); slightly 

calcareous.

510 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately sorted; brown (10YR 5/3).

520 Clayey silty sand (mS); very fine to medium sand with 

silt, clay, and trace granules; moderately to poorly 

sorted; angular to subangular; brown (10YR 5/3).

523 Sandy silty clay (sM); clay with silt and very fine to 

medium sand; moderately to well sorted; yellowish 

brown (10YR 5/4).

2C bottom

530 Gravelly clayey silty sand (gmS); fine to coarse sand 

with silt, clay, and granules; poorly sorted; angular to 

subangular; brown (10YR 5/3).

540 Sandy clayey silt (sM); silt and clay with very fine to 

medium sand and trace coarse sand; moderately sorted; 

brown (10YR 5/3); micaceous.

550 Gravelly clayey silty sand (gmS); fine to coarse sand with 

silt, clay, and granules to small pebbles; very poorly 

sorted; angular to subangular; brown (10YR 5/3).

560 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to small pebbles, and trace clay; 

very poorly sorted; angular to subangular; brown 

(10YR 5/3).

570 Silty sand (zS); medium to very coarse sand with 

silt; poorly sorted; angular to subangular; brown 

(10YR 5/3).

580 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subangular; 

light olive brown (2.5Y 5/3).

590 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3); slightly calcareous.

Table 15A. Lithologic SHAKER log for multiple-well monitoring site NELT7 (16N/02E-16P1S, -16P2S, -16P3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,172 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 865 feet. Screened intervals, 780–800, 620–640, and 380–400 feet.]
Tables 105

Depth 

(feet) Description

600 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

610 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

620 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly to very poorly sorted; 

angular to subangular; light olive brown (2.5Y 5/3).

630 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly to very poorly sorted; 

angular to subangular; light olive brown (2.5Y 5/3).

640 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly to very poorly sorted; 

angular to subangular; light olive brown (2.5Y 5/3).

650 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly to very 

poorly sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

660 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

670 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly to very poorly sorted; 

angular to subangular; grayish brown (2.5Y 5/2).

680 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; very poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

690 Clayey silty sand (mS); fine to coarse sand with silt, 

clay, and trace granules to small pebbles; very poorly 

sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

700 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay and granules to small pebbles; very 

poorly sorted; angular to subangular; light olive brown 

(2.5Y 5/3).

710 Gravelly clayey sand (gmS); medium to very coarse 

sand with clay and granules to small pebbles; very 

poorly sorted; angular to subangular; grayish brown 

(10YR 5/2).

720 Clayey silty sand (mS); medium to very coarse sand 

with silt, clay, and trace granules; very poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

730 Silty sand (zS); fine to coarse sand with silt and trace 

granules; poorly sorted; angular to subrounded; 

grayish brown (10YR 5/2); trace mica.

Depth 

(feet) Description

740 Silty sand (zS); very fine to medium sand with silt, 

trace clay, and granules; poorly to very poorly sorted; 

angular to subangular; grayish brown (10YR 5/2).

750 Silty sand (zS); very fine to medium sand with silt, 

trace clay, and granules; poorly to very poorly sorted; 

angular to subangular; grayish brown (10YR 5/2); 

slightly calcareous.

760 Gravelly silty sand (gmS); fine to very coarse sand, silt, 

granules, and trace clay; very poorly sorted; angular to 

subangular; grayish brown (10YR 5/2).

770 Silty sand (zS); fine to coarse sand with silt and trace 

granules; poorly sorted; angular to subangular; light 

olive brown (2.5Y 5/3).

780 Gravelly sand (gS); fine to coarse sand with granules and 

trace silt; poorly sorted; angular to subangular; grayish 

brown (10YR 5/2).

790 Silty gravelly sand (gmS); medium to very coarse sand 

with granules and silt; poorly to very poorly sorted; 

subangular to subrounded; grayish brown (2.5Y 5/2).

800 Gravelly silty sand (gmS); fine to coarse sand with silt 

and granules; poorly to very poorly sorted; angular to 

subangular; light olive brown (2.5Y 5/3).

810 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subrounded; 

light olive brown (2.5Y 5/3).

820 Gravelly sand (gS); medium to very coarse sand with 

granules and trace silt; moderately to poorly sorted; 

subangular to subrounded; grayish brown (10YR 5/2).

830 Gravelly sand (gS); medium to very coarse sand with 

granules and trace silt; moderately to poorly sorted; 

angular to subrounded; grayish brown (10YR 5/2).

840 Silty gravelly sand (gmS); medium to very coarse sand 

with granules and silt; poorly sorted; angular to 

subrounded; grayish brown (10YR 5/2).

850 Silty gravelly sand (gmS); medium to very coarse sand 

with granules and silt; poorly sorted; angular to 

subrounded; light olive brown (2.5Y 5/3).

860 Silty gravelly sand (gmS); medium to very coarse sand 

with granules to small pebbles and silt; poorly sorted; 

angular to subangular; light olive brown (2.5Y 5/3).

860 Sandy gravel (sG); granules to very large pebbles with 

coarse to very coarse sand; moderately to poorly 

sorted; angular to subangular; very dark grayish brown 

(10YR 3/2).

3C top

865 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace very fine to 

fine sand; moderately to poorly sorted; angular to 

subangular; brown (10YR 4/3); slightly calcareous.

3C bottom

Table 15A. Lithologic SHAKER log for multiple-well monitoring site NELT7 (16N/02E-16P1S, -16P2S, -16P3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,172 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 865 feet. Screened intervals, 780–800, 620–640, and 380–400 feet.]
106 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 18 Sandy gravel (sG); granules to large pebbles with 

coarse to very coarse sand; well to moderately 

sorted; angular to subangular; brown (7.5YR 4/4); 

calcareous.

18 40 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

to very poorly sorted; subangular to subrounded; 

brown (7.5YR 4/4); slightly calcareous.

40 60 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

to very poorly sorted; angular to subangular; brown 

(7.5YR 4/4); slightly calcareous.

60 80 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

to very poorly sorted; angular to subangular; brown 

(7.5YR 4/4); slightly calcareous.

80 100 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

angular to subrounded; brown (7.5YR 4/4); slightly 

calcareous.

100 120 Sand (S); very fine to medium sand with trace 

granules; moderately to well sorted; angular to 

subangular; brown (7.5YR 4/3); slightly calcareous.

120 140 Sand (S); very fine to medium sand with trace 

granules; moderately to well sorted; angular to 

subangular; brown (7.5YR 4/3).

140 160 Silty sand (zS); very fine to medium sand with silt 

and trace granules; moderately sorted; angular 

to subrounded; brown (7.5YR 4/3); slightly 

calcareous; trace mica.

160 180 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately to poorly 

sorted; angular to subangular; brown (7.5YR 4/3); 

mafic sands and gravels; trace mica.

180 200 Gravelly sand (gS); medium to very coarse sand with 

granules; moderately sorted; angular to subangular; 

brown (10YR 4/3); trace mafic sand; trace mica.

Depth

(feet) Description

From To

200 220 Silty sand (zS); very fine to coarse sand with silt 

and trace granules to small pebbles; moderately 

to poorly sorted; angular to subrounded; brown 

(10YR 4/3); calcareous; slightly micaceous.

220 240 Silty sand (zS); very fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; brown (10YR 4/3).

240 260 Clayey sand (cS); very fine to medium sand with clay 

and trace granules; moderately to poorly sorted; 

angular to subrounded; brown (10YR 5/3); slightly 

calcareous.

260 280 Silty sand (zS); very fine to medium sand with clay, 

trace silt, and trace granules; moderately to poorly 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 4/4); slightly micaceous.

280 300 Silty sand (zS); very fine to coarse sand with silt and 

trace granules; moderately to poorly sorted; angular 

to subangular; dark yellowish brown (10YR 4/4); 

slightly micaceous.

300 320 Silty sand (zS); very fine to coarse sand with clay, 

trace silt, and trace granules; moderately to poorly 

sorted; angular to subrounded; yellowish brown 

(10YR 5/4).

320 340 Silty sand (zS); very fine to coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; brown (10YR 5/3).

340 360 Silty sand (zS); very fine to medium sand with silt; 

moderately to well sorted; subrounded to rounded; 

brown (10YR 4/3); slightly micaceous.

360 380 Silty sand (zS); very fine to coarse sand with silt and 

trace granules to small pebbles; moderately to 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

380 400 Silty sand (zS); very fine to medium sand with 

silt; moderately to well sorted; subangular to 

subrounded; brown (10YR 4/3).

Table 15B. Lithologic SIEVE log for multiple-well monitoring site NELT-7 (16N/02E-16P1S, -16P2S, -16P3S), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,172 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 865 feet. Screened intervals, 780–800, 620–640, and 380–400 feet.]
Tables 107

Depth

(feet) Description

From To

400 420 Silty sand (zS); very fine to medium sand with 

silt; moderately to well sorted; subangular to 

subrounded; brown (10YR 4/3).

420 440 Silty sand (zS); very fine to medium sand with 

silt; moderately to well sorted; subangular to 

subrounded; brown (10YR 4/3).

440 460 Silty sand (zS); very fine to medium sand with silt and 

trace clay; moderately to well sorted; angular to 

subangular; brown (10YR 4/3).

460 480 Silty sand (zS); very fine to medium sand with silt and 

trace clay; moderately to well sorted; angular to 

subangular; brown (10YR 4/3).

480 500 Silty sand (zS); very fine to medium sand with silt and 

trace clay; moderately to well sorted; subangular to 

subrounded; brown (10YR 4/3).

500 520 Silty sand (zS); very fine to medium sand with silt, 

trace clay, and trace very coarse sand; moderately 

sorted; angular to subangular; brown (10YR 4/3).

520 540 Silty sand (zS); very fine to medium sand with silt, 

trace clay, and trace very coarse sand; moderately 

sorted; angular to subangular; brown (10YR 4/3); 

slightly micaceous.

540 560 Silty sand (zS); very fine to coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to rounded; brown (10YR 4/3).

560 580 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subrounded; brown (10YR 4/3).

580 600 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subrounded; brown (10YR 4/3); slightly micaceous.

600 620 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subangular; brown (10YR 5/3).

620 640 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

Depth

(feet) Description

From To

640 660 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subangular; brown (10YR 5/3); slightly micaceous.

660 680 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

angular to subangular; brown (10YR 5/3).

680 700 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subangular; grayish brown (10YR 5/2); calcareous.

700 720 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subrounded; grayish brown (10YR 5/2); slightly 

micaceous.

720 740 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subangular; grayish brown (10YR 5/2); slightly 

micaceous.

740 760 Sand (S); fine to very coarse sand with trace granules; 

moderately sorted; angular to subangular; grayish 

brown (10YR 5/2).

760 780 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; angular to 

subrounded; grayish brown (10YR 5/2); slightly 

micaceous.

780 800 Silty sand (zS); fine to coarse sand with silt and trace 

granules; moderately to poorly sorted; subangular to 

subrounded; grayish brown (10YR 5/2).

800 820 Silty sand (zS); very fine to medium sand with silt; 

moderately to well sorted; subrounded to rounded; 

grayish brown (10YR 5/2).

820 840 Silty sand (zS); very fine to medium sand with silt 

and trace coarse sand; moderately to well sorted; 

subangular to rounded; brown (10YR 5/3).

840 860 Silty sand (zS); very fine to medium sand with silt; 

moderately to well sorted; subangular to rounded; 

brown (10YR 5/3).

860 865 No sample collected; cored interval.

Table 15B. Lithologic SIEVE log for multiple-well monitoring site NELT-7 (16N/02E-16P1S, -16P2S, -16P3S), Fort Irwin National Training 

Center, California.—Continued

[Altitude of land surface, approximately 3,172 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 14, 2011. Total depth 

drilled, 865 feet. Screened intervals, 780–800, 620–640, and 380–400 feet.]
108 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

10 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 3/4); slightly calcareous; trace gypsum.

20 Sandy gravel (sG); granules to large pebbles and coarse 

to very coarse sand; well to moderately sorted; angular 

to subangular; dark olive brown (2.5Y 3/3); slightly 

calcareous; trace gypsum.

30 Gravelly sand (gS); very coarse sand with granules to 

medium pebbles; well to moderately sorted; angular 

to subangular; dark brown (10YR 3/3); slightly 

calcareous; trace gypsum.

40 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; well to moderately 

sorted; angular to subangular; dark brown (10YR 3/3).

50 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; dark brown (10YR 3/3).

60 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 4/3).

70 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace medium pebbles; 

well to moderately sorted; subangular to subrounded; 

brown (10YR 4/3).

80 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

90 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

poorly to very poorly sorted; angular to subangular; 

brown (10YR 5/3).

100 Gravelly sand (gS); coarse to very coarse sand with 

granules to medium pebbles; well to moderately 

sorted; very angular to angular; dark brown 

(10YR 3/3); slightly calcareous; trace gypsum.

110 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

subangular to subrounded; dark yellowish brown 

(10YR 4/4).

120 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately sorted; angular 

to subangular; brown (10YR 4/3).

130 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

angular to subangular; dark brown (10YR 3/3); slightly 

calcareous; trace gypsum.

Depth 

(feet) Description

140 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately sorted; angular 

to subangular; brown (10YR 4/3).

150 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

angular to subangular; brown (10YR 4/3).

160 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; dark brown (10YR 3/3).

170 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); slightly calcareous.

180 Gravelly sand (gS); coarse to very coarse sand with 

granules to medium pebbles and trace silt; moderately 

to poorly sorted; angular to subangular; dark yellowish 

brown (10YR 4/4).

190 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

subangular to subrounded; brown (10YR 5/3); slightly 

calcareous.

200 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3); slightly 

calcareous.

210 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

220 Gravelly silty sand (gmS); fine to very coarse sand, silt, 

and granules; poorly sorted; angular to subangular; 

dark yellowish brown (10YR 4/4); slightly calcareous.

230 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; brown (10YR 5/3); slightly calcareous.

240 Gravelly silty sand (gmS); fine to very coarse sand with 

silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3).

250 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); slightly calcareous.

260 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4).

270 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3); slightly 

calcareous.

Table 16A. Lithologic SHAKER log for test well NELT3 (16N/02E-31H1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,097 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 25, 2011. Total depth drilled, 

800 feet. Screened intervals, 720–740, 540–580, 360–360 and 260–300 feet.]
Tables 109

Depth 

(feet) Description

275 Gravelly silty sand (gmS); fine to very coarse sand 

with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4); slightly calcareous; trace gypsum.

1C shoe

280 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4).

290 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

300 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; brown (10YR 5/3).

310 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; brown (10YR 5/3); calcareous.

320 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (10YR 5/3); trace 

microcrystalline quartz.

330 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4).

340 Silty sand (zS); medium to very coarse sand with silt 

and trace granules to small pebbles; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4); slightly calcareous.

350 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

360 Silty sandy gravel (msG); granules to medium pebbles 

with medium to very coarse sand and silt; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4); slightly calcareous.

370 Sandy gravel (sG); granules to medium pebbles with very 

coarse sand; well sorted; very angular to angular; dark 

yellowish brown (10YR 4/4).

380 Silty sandy gravel (msG); granules to medium pebbles 

with silt and very coarse sand; poorly sorted; very 

angular to angular; dark yellowish brown (10YR 4/4); 

trace microcrystalline quartz.

390 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately to well sorted; 

angular to subangular; yellowish brown (10YR 5/4).

400 Sandy gravel (sG); granules to medium pebbles 

with coarse to very coarse sand and trace large 

pebbles; well to moderately sorted; very angular to 

angular; dark yellowish brown (10YR 3/4); trace 

microcrystalline quartz.

Depth 

(feet) Description

410 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately sorted; 

very angular to angular; dark yellowish brown 

(10YR 3/4); trace microcrystalline quartz.

420 Sandy gravel (sG); granules to medium pebbles 

with coarse to very coarse sand and trace large 

pebbles; well to moderately sorted; very angular to 

angular; dark yellowish brown (10YR 4/4); trace 

microcrystalline quartz.

430 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4).

440 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; moderately to poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

450 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

460 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

465 Silty sandy gravel (msG); granules to large pebbles and 

fine to coarse sand with silt; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

2C shoe

470 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

480 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

490 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

500 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles and trace silt; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

510 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

520 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

530 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

Table 16A. Lithologic SHAKER log for test well NELT3 (16N/02E-31H1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,097 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 25, 2011. Total depth drilled, 

800 feet. Screened intervals, 720–740, 540–580, 360–360 and 260–300 feet.]
110 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

540 Sandy clayey silt (sM); silt with clay, medium to 

very coarse sand and trace granules; poorly sorted; 

yellowish brown (10YR 5/4).

550 Gravelly sand (gS); coarse to very coarse sand with 

granules to medium pebbles; well to moderately 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

560 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; moderately sorted; angular 

to subangular; yellowish brown (10YR 5/4).

570 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles and trace medium pebbles; 

well to moderately sorted; angular to subangular; 

yellowish brown (10YR 5/4).

580 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

590 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

600 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

610 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

620 Silty gravelly sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

630 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

640 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

650 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

660 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

665 Slightly gravelly sandy silt ((g)sM); silt with fine to 

medium sand and granules to medium pebbles; poorly 

sorted; yellowish brown (10YR 5/4).

3C shoe

Depth 

(feet) Description

670 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

680 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

690 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

700 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

710 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

720 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

angular to subangular; yellowish brown (10YR 5/4).

730 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles and trace silt; moderately 

sorted; angular to subangular; brown (10YR 5/3); trace 

microcrystalline quartz.

740 Gravelly sand (gS); medium to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

angular to subangular; brown (10YR 5/3).

750 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to small pebbles, and trace clay; 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

760 Gravelly silty sand (gmS); medium to very coarse sand 

with silt, granules to small pebbles, and trace clay; 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

770 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4).

780 Clayey silty sand (mS); coarse to very coarse sand with 

silt, clay, and trace granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

790 Clayey silty sand (mS); coarse to very coarse sand with 

silt, clay, and trace granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

800 Clayey silty sand (mS); medium to very coarse sand with 

silt, clay, and trace granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

Table 16A. Lithologic SHAKER log for test well NELT3 (16N/02E-31H1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,097 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 25, 2011. Total depth drilled, 

800 feet. Screened intervals, 720–740, 540–580, 360–360 and 260–300 feet.]
Tables 111

Depth

(feet) Description

From To

0 18 Gravelly sand (gS); medium to very coarse sand with 

granules to large pebbles and trace fine sand; poorly 

sorted; subangular to subrounded; dark brown 

(10YR 3/3); calcareous.

18 40 Gravelly silty sand (gmS); fine to coarse sand with 

silt and granules to medium pebbles; poorly sorted; 

subangular to subrounded; dark brown (10YR 3/3); 

slightly calcareous; trace gypsum.

40 60 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; dark brown (10YR 3/3); 

slightly calcareous.

60 80 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; dark brown (10YR 3/3); 

slightly calcareous.

80 100 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

subangular to subrounded; dark brown (10YR 3/3); 

slightly calcareous; trace caliche.

100 120 Silty sand (zS); medium to very coarse sand with 

silt; moderately to poorly sorted; subangular to 

subrounded; dark brown (10YR 3/3).

120 140 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; dark brown 

(10YR 3/3).

140 160 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; dark brown 

(10YR 3/3).

160 180 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

angular to subangular; dark yellowish brown 

(10YR 4/4); slightly calcareous; trace gypsum.

180 200 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; dark yellowish brown 

(10YR 4/4); calcareous.

Depth

(feet) Description

From To

200 220 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subrounded; dark 

yellowish brown (10YR 4/4).

220 240 Gravelly sand (gS); fine to coarse sand with granules 

to small pebbles; moderately to poorly sorted; 

angular to subangular; brown (10YR 4/3); slightly 

calcareous.

240 260 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

260 280 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3); 

slightly calcareous; trace gypsum.

280 300 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; brown 

(10YR 4/3); slightly calcareous.

300 320 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

angular to subangular; brown (10YR 4/3); slightly 

calcareous.

320 340 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3).

340 360 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; brown (10YR 4/3).

360 380 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; moderately sorted; 

very angular to angular; brown (10YR 4/3); trace 

microcrystalline quartz.

380 400 Sandy gravel (sG); granules to medium pebbles with 

coarse to very coarse sand; well to moderately 

sorted; angular to subangular; dark brown 

(7.5YR 3/3).

Table 16B. Lithologic SIEVE log for test well NELT3 (16N/02E-31H1S), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,097 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 25, 2011. Total depth drilled, 

800 feet. Screened intervals, 720–740, 540–580, 360–360, and 260–300 feet.]
112 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

400 420 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles and trace large pebbles; 

moderately to poorly sorted; angular to subangular; 

brown (10YR 4/3); microcrystalline quartz.

420 440 Gravelly silty sand (gmS); medium to very coarse 

sand with silt, granules to small pebbles, and 

trace medium pebbles; poorly sorted; subangular 

to subrounded; brown (10YR 4/3); trace 

microcrystalline quartz.

440 460 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; brown (10YR 4/3).

460 480 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

subangular to subrounded; brown (10YR 4/3); 

microcrystalline quartz.

480 500 Gravelly silty sand (gmS); medium to very coarse 

sand with silt, granules to medium pebbles, and 

trace large pebbles; poorly sorted; angular to 

subangular; brown (10YR 4/3); microcrystalline 

quartz.

500 520 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to large pebbles; poorly 

sorted; very angular to angular; brown (10YR 4/3).

520 540 Gravelly sand (gS); medium to very coarse sand 

with trace fine sand and granules to medium 

pebbles; moderately to poorly sorted; subangular to 

subrounded; brown (10YR 4/3).

540 560 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

angular to subangular; brown (10YR 4/3).

560 580 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; moderately sorted; 

subangular to subrounded; brown (10YR 4/3).

580 600 Sand (S); medium to very coarse sand with trace fine 

sand; well sorted; subangular to subrounded; brown 

(10YR 4/3).

Depth

(feet) Description

From To

600 620 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately 

to poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

620 640 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; brown (10YR 4/3); 

slightly micaceous.

640 660 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

660 680 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

680 700 Gravelly sand (gS); medium to very coarse sand 

with granules to small pebbles; moderately sorted; 

angular to subangular; brown (10YR 4/3).

700 720 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3); slightly micaceous.

720 740 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

740 760 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; brown (10YR 5/3).

760 780 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; moderately to poorly sorted; 

subangular to subrounded; brown (10YR 4/3).

780 800 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules; poorly sorted; angular 

to subangular; brown (10YR 4/3).

Table 16B. Lithologic SIEVE log for test well NELT3 (16N/02E-31H1S), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,097 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 25, 2011. Total depth drilled, 

800 feet. Screened intervals, 720–740, 540–580, 360–360, and 260–300 feet.]
Tables 113

Depth 

(feet) Description

10 Silty sand (zS); medium to very coarse sand and 

silt; poorly sorted; angular to subangular; brown 

(7.5YR 5/4).

20 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (7.5YR 4/3).

30 Silty sand (zS); medium to very coarse sand with silt 

and trace granules; poorly sorted; subangular to 

subrounded; dark yellowish brown (10YR 4/4); 

calcareous.

40 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

subangular to subrounded; brown (10YR 4/3); 

calcareous.

50 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; moderately to well sorted; 

angular to subangular; dark brown (10YR 3/3); slightly 

calcareous.

60 Gravelly silty sand (gmS); coarse to very coarse sand 

and silt with granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4); calcareous.

70 Silty sand (zS); medium to very coarse sand with 

silt; poorly sorted; angular to subangular; brown 

(10YR 5/3); slightly calcareous.

80 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subangular; 

brown (10YR 4/3); slightly calcareous.

90 Gravelly sand (gS); coarse to very coarse sand with 

granules to small pebbles; well to moderately sorted; 

angular to subangular; brown (10YR 5/3).

100 Gravelly sand (gS); medium to very coarse sand with 

granules to medium pebbles; well to moderately 

sorted; angular to subangular; brown (10YR 5/3).

110 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

120 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

130 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

140 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and trace granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

150 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

Depth 

(feet) Description

160 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

170 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

180 Silty sand (zS); medium to very coarse sand with silt and 

trace granules to small pebbles; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4).

190 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subangular; 

brown (7.5YR 5/4).

200 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(7.5YR 5/4).

203 Sandy clayey silt (sM); silt with clay and coarse to very 

coarse sand; moderately to poorly sorted; brown 

(7.5YR 5/4).

1C bottom

210 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; brown (7.5YR 5/4).

220 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

230 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

240 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

250 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

260 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

270 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

280 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

290 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

Table 17A. Lithologic SHAKER log for multiple-well monitoring site NELT1 (16N/02E-34Q1S, -34Q2S), Fort Irwin National Training Center, 

California.

[Altitude of land surface, approximately 3,074 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 10, 2011. Total depth drilled, 

803 feet. Screened intervals, 740–760 and 280–300 feet.]
114 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

300 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; brown (7.5YR 5/4).

310 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (7.5YR 5/4).

320 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles with trace 

large pebbles; poorly to very poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

330 Gravelly clayey silty sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; 

very poorly sorted; angular to subangular; brown 

(7.5YR 5/4).

340 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

350 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

360 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; subangular to 

subrounded; yellowish brown (10YR 5/4).

370 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

380 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

390 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to medium pebbles; 

very poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

400 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to medium pebbles; 

very poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

410 Gravelly silty clayey sand (gmS); medium to very 

coarse sand with clay, silt, and granules; very poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

420 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

423 Gravelly silty sand (gmS); medium to very coarse sand, 

silt, and granules to medium pebbles with minor clay; 

poorly to very poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4).

2C bottom

Depth 

(feet) Description

430 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to trace small pebbles; poorly 

sorted; angular to subangular; brown (7.5YR 5/3).

440 Silty sand (zS); medium to very coarse sand with silt and 

trace granules; poorly sorted; angular to subangular; 

brown (7.5YR 5/3).

450 Clayey silty sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/4).

460 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

470 Silty gravelly sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

480 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; brown (7.5YR 5/3).

490 Gravelly clayey sand (gmS); coarse to very coarse sand 

with clay and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

500 Gravelly clayey sand (gmS); medium to very coarse sand 

with clay and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

510 Gravelly silty clayey sand (gmS); medium to very 

coarse sand with clay, silt, and granules; very poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

520 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; moderately to 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

530 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; moderately to 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4).

540 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

550 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

560 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

570 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

Table 17A. Lithologic SHAKER log for multiple-well monitoring site NELT1 (16N/02E-34Q1S, -34Q2S), Fort Irwin National Training Center, 

California.—Continued

[Altitude of land surface, approximately 3,074 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 10, 2011. Total depth drilled, 

803 feet. Screened intervals, 740–760 and 280–300 feet.]
Tables 115

Table 17A. Lithologic SHAKER log for multiple-well monitoring site NELT1 (16N/02E-34Q1S, -34Q2S), Fort Irwin National Training Center, 

California.—Continued

[Altitude of land surface, approximately 3,074 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 10, 2011. Total depth drilled, 

803 feet. Screened intervals, 740–760 and 280–300 feet.]

Depth 

(feet) Description

580 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

590 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with silt, clay, and granules to small pebbles; very 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4).

600 Gravelly silty clayey sand (gmS); medium to very 

coarse sand with silt and granules to small pebbles; 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

610 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

620 Silty sand (zS); medium to very coarse sand with silt; 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

630 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

640 Clayey silty sand (mS); medium to very coarse sand 

with silt, clay, and trace granules to small pebbles; 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

650 Silty clayey sand (mS); medium to very coarse sand with 

silt and clay; poorly sorted; angular to subangular; 

dark yellowish brown (10YR 4/4).

660 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; yellowish brown (10YR 5/4).

670 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

680 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; very 

poorly sorted; angular to subangular; yellowish brown 

(10YR 5/4).

690 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules to small pebbles; 

very poorly sorted; subangular to subrounded; dark 

yellowish brown (10YR 4/4).

Depth 

(feet) Description

700 Gravelly silty clayey sand (gmS); medium to very 

coarse sand with clay, silt, and granules; very poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

710 Gravelly silty clayey sand (gmS); medium to very coarse 

sand with clay, silt, and granules; very poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

720 Silty clayey sand (mS); medium to very coarse sand with 

silt, clay, and trace granules to small pebbles; poorly 

sorted; subangular to subrounded; dark yellowish 

brown (10YR 4/4).

730 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

740 Gravelly silty sand (gmS); coarse to very coarse sand 

with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

750 Gravelly silty clayey sand (gmS); coarse to very coarse 

sand with clay, silt, and granules; very poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

760 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

770 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules; poorly sorted; angular to 

subangular; dark yellowish brown (10YR 4/4).

780 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

790 Sand (S); medium to very coarse sand with trace 

granules; well sorted; angular to subangular; dark 

yellowish brown (10YR 4/4).

800 Gravelly silty sand (gmS); medium to very coarse sand 

with silt and granules to small pebbles; poorly sorted; 

angular to subangular; yellowish brown (10YR 5/4).

803 Slightly gravelly sandy silt ((g)sM); silt with medium 

to very coarse sand and granules to medium pebbles; 

moderately to poorly sorted; dark yellowish brown 

(10YR 4/4).

3C bottom
116 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 20 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(7.5YR 4/3).

20 40 Silty sand (zS); fine to coarse sand with silt; 

moderately to poorly sorted; subangular to 

subrounded; brown (7.5YR 4/3); slightly 

calcareous.

40 60 Silty sand (zS); fine to coarse sand with silt and trace 

very coarse sand; moderately to poorly sorted; 

subangular to subrounded; brown (7.5YR 4/3); 

calcareous.

60 80 Silty sand (zS); medium to very coarse sand with 

silt and trace granules; poorly sorted; angular to 

subrounded; brown (7.5YR 4/3); calcareous.

80 100 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subrounded; brown (10YR 4/3); 

slightly calcareous.

100 120 Sandy gravel (sG); medium to very coarse sand with 

granules to medium pebbles; moderately to well 

sorted; angular to subangular; brown (10YR 4/3).

120 140 Silty sandy gravel (msG); granules to medium pebbles 

with coarse to very coarse sand and silt; poorly 

sorted; angular to subangular; dark yellowish brown 

(10YR 4/4).

140 160 Sandy gravel (sG); granules to medium pebbles with 

medium to very coarse sand; well to moderately 

sorted; angular to subangular; brown (7.5YR 4/4).

160 180 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

180 200 Gravelly silty sand (gmS); medium to very coarse 

sand and silt with granules to medium pebbles; 

moderately to poorly sorted; angular to subangular; 

yellowish brown (10YR 5/4).

200 203 No sample collected; cored interval.

203 220 Sandy gravel (sG); medium to very coarse sand with 

granules to large pebbles; moderately to well sorted; 

angular to subangular; brown (7.5YR 5/4).

Depth

(feet) Description

From To

220 240 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

240 260 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to large pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

260 280 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

280 300 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

300 320 Sandy gravel (sG); granules to large pebbles with 

coarse to very coarse sand; well to moderately 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

320 340 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to large pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

340 360 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

360 380 Gravelly silty sand (gmS); medium to vey coarse sand 

with silt and granules to medium pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

380 400 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

400 420 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

420 423 No sample collected; cored interval.

Table 17B. Lithologic SIEVE log for multiple-well monitoring site NELT1 (16N/02E-34Q1S, -34Q2S), Fort Irwin National Training Center, 

California.

[Altitude of land surface, approximately 3,074 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 10, 2011. Total depth drilled, 

803 feet. Screened intervals, 740–760 and 280–300 feet.]
Tables 117

Depth

(feet) Description

From To

423 440 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

440 460 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

460 480 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

480 500 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

500 520 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

520 540 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

540 560 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4).

560 580 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

580 600 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

600 620 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

Depth

(feet) Description

From To

620 640 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subangular; yellowish 

brown (10YR 5/4).

640 660 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; poorly 

sorted; angular to subangular; yellowish brown 

(10YR 5/4).

660 680 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules; poorly sorted; angular 

to subangular; yellowish brown (10YR 5/4).

680 700 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4).

700 720 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; subangular to subrounded; yellowish 

brown (10YR 5/4).

720 740 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

740 760 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

760 780 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to medium pebbles; 

poorly sorted; angular to subrounded; brown 

(10YR 4/3).

780 800 Gravelly silty sand (gmS); medium to very coarse 

sand with silt and granules to small pebbles; 

poorly sorted; subangular to subrounded; brown 

(10YR 4/3).

800 803 No sample collected; cored interval.

Table 17B. Lithologic SIEVE log for multiple-well monitoring site NELT1 (16N/02E-34Q1S, -34Q2S), Fort Irwin National Training Center, 

California.—Continued

[Altitude of land surface, approximately 3,074 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, July 10, 2011. Total depth drilled, 

803 feet. Screened intervals, 740–760 and 280–300 feet.]
118 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth 

(feet) Description

10 Sandy gravel (sG); granules to medium pebbles 

and medium to very coarse sand; poorly sorted; 

subrounded to subangular; dark yellowish brown 

(10YR 4/4).

20 Sandy gravel (sG); granules to medium pebbles 

and medium to very coarse sand; poorly sorted; 

subrounded to subangular; dark yellowish brown 

(10YR 4/4).

30 Sandy gravel (sG); granules to medium pebbles 

and medium to very coarse sand; poorly sorted; 

subrounded to subangular; light yellowish brown 

(10YR 6/4).

40 Sandy gravel (sG); granules to medium pebbles 

and medium to very coarse sand; poorly sorted; 

subrounded to subangular; light yellowish brown 

(10YR 6/4).

50 Gravelly sand (gS); coarse to very coarse sand and 

granules to medium pebbles; moderately sorted; 

subrounded to subangular; dark yellowish brown 

(10YR 4/4).

60 Silty sandy gravel (msG); granules to medium pebbles, 

fine to very coarse sand, and silt; very poorly sorted; 

subrounded to subangular; dark yellowish brown 

(10YR 4/4).

70 Gravelly sand (gS); very coarse sand and granules 

to medium pebbles; moderately to well sorted; 

subrounded to subangular; brown (10YR 5/3).

80 Sandy gravel (sG); granules to medium sand and coarse 

to very coarse sand; moderately to well sorted; 

subrounded to subangular; brown (10YR 5/3).

90 Sandy gravel (sG); granules to medium sand and coarse 

to very coarse sand; moderately to well sorted; 

subrounded to subangular; brown (10YR 5/3).

100 Sandy gravel (sG); granules to medium sand and coarse 

to very coarse sand; moderately to well sorted; 

subrounded to subangular; brown (10YR 5/3).

110 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to small pebbles; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

120 Gravelly silty sand (gmS); coarse to very coarse 

sand, silt, and granules; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

130 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to small pebbles; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

Depth 

(feet) Description

140 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to small pebbles; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

150 Silty sandy gravel (msG); granules to small pebbles, 

medium to very coarse sand, and silt; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

160 Silty sandy gravel (msG); granules, very coarse sand 

and silt; moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

170 Silty sandy gravel (msG); granules to small pebbles 

with coarse to very coarse sand and silt; moderately 

to poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

180–200 

Interval 

sample

Silty sandy gravel (msG); granules to small pebbles 

with coarse to very coarse sand and silt; moderately 

to poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

210 Gravelly sand (gS); fine to very coarse sand and granules 

to small pebbles; poorly to very poorly sorted; 

subrounded to subangular; black (10YR 2/1); potential 

basaltic lava flow.

220 Gravelly clayey sand (gmS); coarse to very coarse sand 

with clay and granules to large pebbles; very poorly 

sorted; subrounded to subangular; brown (10YR 4/3).

230 Slightly gravelly sandy clay ((g)sM); clay and medium 

to very coarse sand with minor granules; very poorly 

sorted; brown (10YR 4/3).

240 Slightly gravelly sandy clay ((g)sM); clay and coarse to 

very coarse sand and granules to small pebbles; very 

poorly sorted; brown (10YR 4/3).

250 Gravelly clayey sand (gmS); fine to very coarse sand 

and clay and granules to medium pebbles; very poorly 

sorted; subrounded to subangular; brown (10YR 4/3).

260 Gravelly clayey sand (gmS); fine to very coarse sand 

and clay and granules to medium pebbles; very poorly 

sorted; subrounded to subangular; brown (10YR 4/3).

270 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; poorly sorted; subrounded to 

subangular; brown (10YR 4/3).

280 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to small pebbles; poorly sorted; 

subrounded to subangular; brown (10YR 4/3).

290 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to small pebbles; poorly sorted; 

subrounded to subangular; brown (10YR 4/3).

Table 18A. Lithologic SHAKER log for test well SBTW (31S/46E-05B1M), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,041 feet. Drilled by U.S Geological Survey using mud-rotary drilling method, December 7, 2009. Total depth drilled, 

600 feet. Screened intervals, 220–400 and 140–200 feet. Italics indicate interpretation based on geologist’s field observations, geophysical logs, and examination 

of drill cuttings.]
Tables 119

Depth 

(feet) Description

300 Silty sandy gravel (msG); granules to medium pebbles, 

coarse to very coarse sand, and silt; poorly sorted; 

subrounded to subangular; brown (10YR 4/3).

310 Gravelly silty sand (gmS); very coarse sand, silt, and 

granules to small pebbles; poorly sorted; subrounded 

to subangular; brown (10YR 4/3).

320 Gravelly silty sand (gmS); very coarse sand, silt, and 

granules to small pebbles; poorly sorted; subrounded 

to subangular; brown (10YR 4/3).

330 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; poorly sorted; subrounded to 

subangular; brown (10YR 4/3).

340 Sandy gravel (sG); granules to small pebbles and coarse 

to very coarse sand; moderately to well sorted; 

subrounded to subangular; assorted colors.

350 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately to well sorted; 

subrounded to subangular; assorted colors.

360 Sandy gravel (sG); granules to small pebbles and coarse 

to very coarse sand; moderately to well sorted; 

subrounded to subangular; assorted colors.

370 Sandy gravel (sG); granules to medium pebbles and 

coarse to very coarse sand; moderately to well sorted; 

subrounded to subangular; assorted colors.

380 Gravelly sand (gS); coarse to very coarse sand and 

granules; well to very well sorted; subrounded to 

subangular; assorted colors.

390 Gravelly silty sand (gmS); fine to very coarse sand, silt, 

and granules; poorly to very poorly sorted; subrounded 

to subangular; light yellowish brown (10YR 6/4).

400 Gravelly silty sand (gmS); fine to very coarse sand, silt, 

and granules to small pebbles; very poorly sorted; 

subrounded to subangular; pale brown (10YR 6/3).

410 Gravelly clayey sand (gmS); fine to very coarse sand, 

clay, and granules; very poorly sorted; subrounded to 

subangular; pale brown (10YR 6/3).

420 Clayey sand (cS); coarse to very coarse sand and clay; 

moderately sorted; subrounded to subangular; brown 

(10YR 5/3).

430 Clayey sand (cS); medium to very coarse sand and 

clay; moderately to poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

440 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; moderately to poorly sorted; 

subrounded to subangular; brown (10YR 5/3).

450 Silty sand (zS); medium to very coarse sand and 

silt; moderately to poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

Depth 

(feet) Description

460 Gravelly silty sand (gmS); medium to very coarse 

sand, silt, and granules; poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

470 Gravelly silty sand (gmS); medium to very coarse 

sand, silt, and granules; poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

480 Gravelly silty sand (gmS); medium to very coarse 

sand, silt, and granules; poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

490 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; poorly sorted; subrounded to 

subangular; pale brown (10YR 6/3).

500 Gravelly clayey sand (gmS); fine to very coarse sand, 

clay, and granules; very poorly sorted; subrounded to 

subangular; reddish brown (5YR 5/3).

510 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules to small pebbles; poorly 

sorted; subrounded to subangular; grayish brown 

(10YR 5/2).

520 Gravelly clayey sand (gmS); fine to very coarse sand, 

clay, and granules; very poorly sorted; subrounded to 

subangular; grayish brown (10YR 5/2).

530 Gravelly clayey sand (gmS); fine to very coarse sand, 

clay, and granules; very poorly sorted; subrounded to 

subangular; grayish brown (10YR 5/2).

540 Gravelly clayey sand (gmS); fine to very coarse sand, 

clay, and granules; very poorly sorted; subrounded to 

subangular; grayish brown (10YR 5/2).

550 Clayey sand (cS); fine to very coarse sand and clay; 

poorly sorted; subrounded to subangular; grayish 

brown (10YR 5/2).

560 Gravelly clayey sand (gmS); fine to very coarse sand, 

clay, and granules; very poorly sorted; subrounded to 

subangular; grayish brown (10YR 5/2).

570 Gravelly clay (gM); clay with granules to small pebbles; 

moderately to poorly sorted; brown (10YR 5/3).

580 Clayey sand (cS); medium to very coarse sand and 

clay; moderately to poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

590 Clayey sand (cS); medium to very coarse sand and 

clay; moderately to poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

600 Clayey sand (cS); medium to very coarse sand and 

clay; moderately to poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

Table 18A. Lithologic SHAKER log for test well SBTW (31S/46E-05B1M), Fort Irwin National Training Center, California.—Continued

[Altitude of land surface, approximately 3,041 feet. Drilled by U.S Geological Survey using mud-rotary drilling method, December 7, 2009. Total depth drilled, 

600 feet. Screened intervals, 220–400 and 140–200 feet. Italics indicate interpretation based on geologist’s field observations, geophysical logs, and examination 

of drill cuttings.]
120 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

20 40 Gravelly sand (gS); fine to coarse sand and small 

pebbles; poorly sorted; subrounded to subangular; 

brown (10YR 5/3).

40 60 Slightly gravelly sand ((g)S); fine to very coarse sand 

with small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

60 80 Gravelly sand (gS); medium to very coarse sand 

and small pebbles; poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

80 100 Sand (S); very fine to very coarse sand; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

100 120 Gravelly sand (gS); very fine to coarse sand and small 

pebbles; poorly sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

120 140 Gravelly sand (gS); very fine to coarse sand and 

granules to small pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

140 160 Slightly gravelly sand ((g)S); fine to coarse sand 

and minor small to large pebbles; poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

160 180 Gravelly sand (gS); very fine to very coarse sand 

and granules to small pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

180 200 Gravelly sand (gS); fine to very coarse sand and 

granules to medium pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

200 220 Gravelly sand (gS); fine to coarse sand and granules 

to small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

220 240 Slightly gravelly sand ((g)S); medium to very coarse 

sand and minor small to medium pebbles; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

240 260 Slightly gravelly sand ((g)S); fine to very coarse sand 

and minor granules; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

260 280 Slightly gravelly sand ((g)S); fine to coarse sand 

with minor granules; moderately to poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

280 300 Slightly gravelly sand ((g)S); fine to very coarse sand 

with minor granules; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

Depth

(feet) Description

From To

300 320 Slightly gravelly sand ((g)S); fine to very coarse sand 

with minor granules; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

320 340 Gravelly sand (gS); fine to very coarse sand and 

granules to small pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

340 360 Gravelly sand (gS); fine to very coarse sand and 

granules to small pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

360 380 Gravelly sand (gS); fine to very coarse sand and 

granules to small pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

380 400 Gravelly sand (gS); fine to very coarse sand and 

granules to small pebbles; very poorly sorted; 

subrounded to subangular; pale brown (10YR 6/3).

400 420 Sand (S); fine to very coarse sand; moderately to 

poorly sorted; subrounded to subangular; pale 

brown (10YR 6/3).

420 440 Clayey sand (cS); very fine to very coarse sand and 

clay; very poorly sorted; subrounded to subangular; 

pale brown (10YR 6/3).

440 460 Sand (S); fine to very coarse sand; moderately to 

poorly sorted; subrounded to subangular; light 

yellowish brown (10YR 6/4).

460 480 Gravelly sand (gS); fine to very coarse sand and 

granules; very poorly to poorly sorted; subrounded 

to subangular; pale brown (10YR 6/3).

480 500 Gravelly sand (gS); fine to very coarse sand and 

granules; very poorly to poorly sorted; subrounded 

to subangular; pale brown (10YR 6/3).

500 520 Gravelly sand (gS); fine to very coarse sand and 

granules; very poorly to poorly sorted; subrounded 

to subangular; pale brown (10YR 6/3).

520 540 Gravelly sand (gS); fine to very coarse sand and 

granules to small pebbles; very poorly sorted; 

subrounded to subangular; pale brown (10YR 6/3).

540 560 Gravelly sand (gS); very fine to very coarse sand 

and granules; very poorly sorted; subrounded to 

subangular; brown (10YR 5/3).

560 580 Sand (S); fine to coarse sand; moderately to well 

sorted; subrounded to subangular; light brownish 

gray (10YR 6/2).

580 600 Silty sand (zS); fine to very coarse sand and silt; 

poorly sorted; subrounded to subangular; brown 

(10YR 5/3).

Table 18B. Lithologic SIEVE log for test well SBTW (31S/46E-05B1M), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,041 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, December 7, 2009. Total depth drilled, 

600 feet. Screened intervals, 220–400 and 140–200 feet.]
Tables 121

Depth 

(feet) Description

10 Sandy gravel (sG); granules to large pebbles and medium 

to very coarse sand; very poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/6).

20 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

30 Silty sand (zS); coarse to very coarse sand and silt; 

moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

40 Silty sandy gravel (msG); granules to small pebbles, 

coarse to very coarse sand, and silt; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

50 Silty sand (zS); very fine and very coarse sand with silt; 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

60 Sandy clay (sC); clay and coarse sand; moderately 

sorted; yellowish brown (10YR 5/4).

70 Gravelly clayey sand (gmS); coarse to very coarse sand, 

clay, and granules to very large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

80 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to medium pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

90 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to medium pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

100 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

110 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

120 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules to large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

130 Gravelly clayey sand (gmS); coarse to very coarse 

sand, clay, and granules; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

140 Silty sandy gravel (msG); granules to small pebbles, 

medium to very coarse sand, and silt; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

150 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules to large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

Depth 

(feet) Description

160 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules to large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

165 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules to large pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4); weathered basalt.

170 Clayey sand (cS); coarse to very coarse sand and 

clay; moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

180 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

190 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules to medium pebbles; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

200 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

210 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

220 Gravelly clay (gM); clay and granules to small pebbles; 

moderately to poorly sorted; yellowish brown 

(10YR 5/4).

230 Gravelly clayey sand (gmS); medium to very coarse 

sand, clay, and granules; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

240 Gravelly clay (gM); clay and granules; moderately to 

poorly sorted; yellowish brown (10YR 5/4).

250 Gravelly clay (gM); clay and granules; moderately to 

poorly sorted; yellowish brown (10YR 5/4).

260 Clayey sand (cS); coarse to very coarse sand and 

clay; moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

270 Clayey sand (cS); coarse to very coarse sand and 

clay; moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

280 Clayey sand (cS); coarse to very coarse sand and 

clay; moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

290 Clayey sand (cS); coarse to very coarse sand and clay; 

moderately sorted; subangular to angular; yellowish 

brown (10YR 5/4).

298 Clayey sand (cS); coarse to very coarse sand and clay; 

moderately sorted; subangular to angular; yellowish 

brown (10YR 5/4).

Table 19A. Lithologic SHAKER log for multiple-well monitoring site SBMW (31S/46E-05B2M, -05B3M), Fort Irwin National Training 

Center, California.

[Altitude of land surface, approximately 3,044 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2010. Total depth drilled, 

298 feet. Screened intervals, 270–290 and 130–150 feet. Italics indicate interpretation based on geologist’s field observations, geophysical logs, and examination 

of drill cuttings.]
122 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 20 Gravelly sand (gS); medium to very coarse sand 

and granules to small pebbles; moderately to 

poorly sorted; subrounded to subangular; brown 

(7.5YR 5/4).

20 40 Gravelly sand (gS); medium to very coarse sand 

and granules to small pebbles; moderately to 

poorly sorted; subrounded to subangular; brown 

(7.5YR 5/4).

40 60 Sand (S); fine to coarse sand; moderately sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

60 80 Slightly gravelly sand ((g)S); fine to coarse sand 

and small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

80 100 Slightly gravelly sand ((g)S); fine to coarse sand 

and small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

100 120 Gravelly sand (gS); fine to very coarse sand and 

granules to large pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

120 140 Gravelly sand (gS); fine to very coarse sand and 

granules; poorly sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

140 160 Sandy gravel (sG); granules to large pebbles and 

medium to very coarse sand; poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

Table 19B. Lithologic SIEVE log for multiple-well monitoring site SBMW (31S/46E-05B2M, -05B3M), Fort Irwin National Training Center, 

California.

[Altitude of land surface, approximately 3,044 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, February 23, 2010. Total depth drilled, 

298 feet. Screened intervals, 270–290 and 130–150 feet.]

Depth

(feet) Description

From To

160 178 Clayey sandy gravel (msG); granules to medium 

pebbles, fine to coarse sand, and clay; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

178 198 Clayey sandy gravel (msG); granules to large pebbles, 

fine to coarse sand, and clay; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

198 218 Clayey sandy gravel (msG); granules to medium 

pebbles, fine to coarse sand, and clay; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

218 238 Gravelly silty sand (gmS); very fine to coarse sand, 

silt, and granules; poorly to very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

238 258 Silty sand (zS); very fine to very coarse sand and silt; 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

258 278 Gravelly sand (gS); very fine to very coarse sand 

and granules to small pebbles; very poorly sorted; 

subrounded to subangular; yellowish brown 

(10YR 5/4).

278 298 Gravelly sand (gS); very fine to very coarse sand and 

granules; poorly sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).
Tables 123

Depth 

(feet) Description

10 Gravelly sand (gS); fine to very coarse sand and granules 

to small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

20 Gravelly sand (gS); fine to very coarse sand and granules 

to small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

30 Gravelly sand (gS); fine to very coarse sand and granules 

to small pebbles; poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

40 Sandy gravel (sG); granules to small pebbles and 

medium to very coarse sand; moderately to poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

50 Gravelly sand (gS); medium to very coarse sand and 

granules; moderately to poorly sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

60 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and small pebbles; very poorly sorted; subrounded 

to subangular; yellowish brown (10YR 5/4).

70 Gravelly silty sand (gmS); very fine to very coarse sand, 

silt, and small pebbles; very poorly sorted; subrounded 

to subangular; yellowish brown (10YR 5/4).

80 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; moderately sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

90 Silty sand (zS); coarse to very coarse sand and silt; well 

sorted; rounded to subrounded; yellowish brown 

(10YR 5/4).

100 Gravelly silty sand (gmS); coarse to very coarse sand, 

silt, and granules; moderately sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

110 Silty sand (zS); coarse to very coarse sand and silt; well 

sorted; rounded to subrounded; yellowish brown 

(10YR 5/4).

120 Silty sand (zS); medium to very coarse sand and silt; 

moderately sorted; subrounded to subangular; 

yellowish brown (10YR 5/4).

130 Gravelly silty sand (gmS); medium to very coarse 

sand, silt, and granules to large pebbles; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

140 Silty sand (zS); medium to coarse sand and silt; 

moderately sorted; rounded to subrounded; yellowish 

brown (10YR 5/4).

150 Gravelly silty sand (gmS); medium to very coarse sand, 

silt, and granules to medium pebbles; very poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

160 Silty sandy gravel (msG); granules to medium pebbles, 

coarse to very coarse sand, and silt; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

Depth 

(feet) Description

170 Silty sandy gravel (msG); granules to medium pebbles, 

coarse to very coarse sand, and silt; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

180 Silty sandy gravel (msG); granules to medium pebbles, 

coarse to very coarse sand, and silt; moderately to 

poorly sorted; subrounded to subangular; yellowish 

brown (10YR 5/4).

190 Silty sandy gravel (msG); granules to large pebbles, 

medium to very coarse sand, and silt; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

200 Silty sandy gravel (msG); granules to large pebbles, 

medium to very coarse sand, and silt; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

210 Silty sandy gravel (msG); granules to large pebbles, 

medium to very coarse sand, and silt; poorly 

sorted; subrounded to subangular; yellowish brown 

(10YR 5/4).

220 Silty sandy gravel (msG); granules and medium to very 

coarse sand with silt; moderately sorted; subrounded to 

subangular; yellowish brown (10YR 5/4).

230 Silty sandy gravel (msG); granules and medium to very 

coarse sand with silt; moderately sorted; subrounded to 

subangular; yellowish brown (10YR 5/4); weathered 

basalt?

240 Gravelly sand (gS); coarse to very coarse sand and 

granules to medium pebbles; moderately sorted; 

subangular to angular; very dark grayish brown 

(10YR 3/2); weathered basalt.

250 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately sorted; 

subangular to angular; very dark grayish brown 

(10YR 3/2); weathered basalt.

260 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately sorted; 

subangular to angular; very dark grayish brown 

(10YR 3/2); weathered basalt.

270 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately sorted; 

subangular to angular; very dark grayish brown 

(10YR 3/2); weathered basalt.

280 Gravelly sand (gS); coarse to very coarse sand and 

granules to small pebbles; moderately sorted; 

subangular to angular; very dark grayish brown 

(10YR 3/2); weathered basalt.

280 Basalt; aphanitic; very dark gray (10YR 3/1).

Washed

Table 20A. Lithologic SHAKER log for single-well monitoring site SBMC (31S/46E-05D1M), Fort Irwin National Training Center, 

California.

[Altitude of land surface, approximately 3,041 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, November 17, 2009. Total depth 

drilled, 280 feet. Screened interval, 180–200 feet. Washed—sample was washed to remove fine grained material and drilling mud. Italics indicate interpretation 

based on geologist’s field observations, geophysical logs, and examination of drill cuttings.]
124 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Depth

(feet) Description

From To

0 20 Sand (S); fine to coarse sand with minor granules; moderately to poorly sorted; subangular to subrounded; yellowish brown 

(10YR 5/6).

20 40 Slightly gravelly sand ((g)S); very fine to coarse sand and granules to small pebbles; poorly sorted; subangular to rounded; 

yellowish brown (10YR 5/4).

40 60 Sand (S); fine to coarse sand, trace very coarse sand, and granules; moderately sorted; subangular to subrounded; yellowish brown 

(10YR 5/4).

60 80 Gravelly sand (gS); very fine to coarse sand and granules to small pebbles with trace clay; poorly sorted; subangular to rounded; 

yellowish brown (10YR 5/4).

80 100 Sand (S); very fine to coarse sand and trace granules; moderately sorted; subangular to subrounded; yellowish brown (10YR 5/4).

100 120 Slightly gravelly sand ((g)S); very fine to very coarse sand and granules to small pebbles; poorly sorted; subangular to subrounded; 

yellowish brown (10YR 5/4).

120 140 Sandy gravel (sG); granules to small pebbles and very fine to very coarse sand with trace silt; very poorly sorted; angular to 

rounded; yellowish brown (10YR 5/4).

140 160 Gravelly sand (gS); very fine to very coarse sand and granules to small pebbles with trace clay; very poorly sorted; subangular to 

subrounded; yellowish brown (10YR 5/4).

160 180 Gravelly sand (gS); very fine to very coarse sand and granules to small pebbles with trace clay; very poorly sorted; subangular to 

subrounded; light yellowish brown (10YR 6/4).

180 200 Gravelly sand (gS); very fine to coarse sand and granules to small pebbles with trace clay; very poorly sorted; subangular to 

subrounded; brown (10YR 5/3).

200 220 Sandy gravel (sG); granules to small pebbles and very fine to very coarse sand; poorly sorted; subangular to subrounded; pale 

brown (10YR 6/3).

220 240 Gravelly sand (gS); very fine to very coarse sand and granules to small pebbles with trace clay; very poorly sorted; angular to

subrounded; pale brown (10YR 6/3); weathered basalt?

240 260 Sandy gravel (sG); granules to medium pebbles and fine to very coarse sand; very poorly sorted; angular to subrounded; very dark 

gray (10YR 3/1); medium pebble weathered basalt fragments.

260 280 Sand (S); very fine to very coarse sand; poorly sorted; angular to subangular; very dark gray (10YR 3/1); very coarse sand 

weathered basalt fragments.

Table 20B. Lithologic SIEVE log for single-well monitoring site SBMC (31S/46E-05D1M), Fort Irwin National Training Center, California.

[Altitude of land surface, approximately 3,041 feet. Drilled by U.S. Geological Survey using mud-rotary drilling method, November 17, 2009. Total depth 

drilled, 280 feet. Screened intervals, 180–200 feet. Italics indicate interpretation based on geologist’s field observations, geophysical logs, and examination of 

drill cuttings.]
Tables 125

Table 21. Summary of water-level data from monitoring and test wells, Fort Irwin National Training Center, California, 2012.

—Continued

[Altitudes were interpolated from a topographic map. Water levels are from the most recent complete set of static water levels for each site. All water-level data 

for each well may by accessed via NWISWeb links on the right side of the table. Status codes for water level measurements: Z, Other conditions existed that 

would affect the measured water level. Abbreviations: hh:mm, hour:minute; mm/dd/yyyy, month/day/year; NAVD 88, North American Vertical Datum of 1988; 

NWIS, U.S. Geological Survey National Water Information System; PDT, Pacific daylight time; PST, Pacific standard time; #, number]

Common 

name

State well 

number

Perforated 

interval 

(feet below 

land surface)

Altitude of 

land-surface 

datum 

(NAVD 88)

Water-level 

date 

(mm/dd/yyyy)

Water-level 

time 

(24 hour)

(hh:mm)

Water-level 

time datum

Water-level 

(feet below 

land surface)

Link to 

water levels 

in NWIS

Site LL04

LL04 #1 12N/03E-01M1S 950–970 2,410 02/14/2012 09:20 PST 295.28 X

Site LL04B

LL04B #1 12N/03E-01M4S 470–490 2,410 02/14/2012 09:25 PST 295.46 X

LL04B #2 12N/03E-01M5S 330–350 2,410 02/14/2012 09:30 PST 295.50 X

Site CRTH2

CRTH2 #1 13N/05E-08B1S 920–940 1,432 03/4/2012 08:30 PST 56.68 X

*

CRTH2 #2 13N/05E-08B2S 270–290 1,432 03/4/2012 08:35 PST 60.55 X

Site CRTH1

CRTH1 #1 13N/05E-28Q1S 1,240–1,260 1,577 02/23/2012 17:30 PST 195.91 X

CRTH1 #2 13N/05E-28Q2S 700–720 1,577 02/23/2012 17:37 PST 200.14 X

CRTH1 #3 13N/05E-28Q3S

235–255

1,577 02/23/2012 17:41 PST 160.55 X

175–195

Site GOLD2

GOLD2 #1 14N/01E-07R1S 420–440 3,107 03/27/2012 09:55 PDT 247.29 X

GOLD2 #2 14N/01E-07R2S 330–350 3,107 03/27/2012 10:00 PDT 247.34 X

**GOLD2 #3 14N/01E-07R3S 220–240 3,107 03/27/2012 10:05 PDT 218.04 X

Site BLA5

BLA5 #1 14N/03E-26K1S 320–340 2,345 03/27/2012 16:45 PDT 187.01 X

BLA5 #3 14N/03E-26K3S 190–210 2,345 03/27/2012 16:50 PDT 186.17 X

Site BLA5B

BLA5B #1 14N/03E-26K4S 250–270 2,345 03/27/2012 16:55 PDT 186.84 X

Site GOLD1

GOLD1 #1 15N/01E-28R1S 650–670 3,058 03/29/2012 16:47 PDT 171.10 X

GOLD1 #2 15N/01E-28R2S 560–580 3,058 03/29/2012 16:44 PDT 171.01 X

GOLD1 #3 15N/01E-28R3S 350–370 3,058 03/29/2012 16:42 PDT 171.05 X

Site GOLD1-T

GOLD1-T #1 15N/01E-28R4S 

620–680

300–420 3,064 03/25/2012 11:33 PDT 171.96 X 

260–280

Table 21. Summary of water-level data from monitoring and test wells, Fort Irwin National Training Center, California, 2012.
126 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

Table 21. Summary of water-level data from monitoring and test wells, Fort Irwin National Training Center, California, 2012.

—Continued

[Altitudes were interpolated from a topographic map. Water levels are from the most recent complete set of static water levels for each site. All water-level data 

for each well may by accessed via NWISWeb links on the right side of the table. Status codes for water level measurements: Z, Other conditions existed that 

would affect the measured water level. Abbreviations: hh:mm, hour:minute; mm/dd/yyyy, month/day/year; NAVD 88, North American Vertical Datum of 1988; 

NWIS, U.S. Geological Survey National Water Information System; PDT, Pacific daylight time; PST, Pacific standard time; #, number]

Common 

name

State well 

number

Perforated 

interval 

(feet below 

land surface)

Altitude of 

land-surface 

datum 

(NAVD 88)

Water-level 

date 

(mm/dd/yyyy)

Water-level 

time 

(24 hour)

(hh:mm)

Water-level 

time datum

Water-level 

(feet below 

land surface)

Link to 

water levels 

in NWIS

Site NELT6

NELT6 #1 15N/02E-05N1S 

760–840

500–560 3,139 03/29/2012 14:25 PDT 300.87 X 

400–460

Site NELT2

NELT2 #1 15N/03E-06L1S 760–800 3,054 02/11/2012 16:38 PST 216.59 X

NELT2 #2 15N/03E-06L2S 510–530 3,054 02/11/2012 16:45 PST 216.89 X

NELT2 #3 15N/03E-06L3S 280–300 3,054 02/11/2012 16:50 PST 216.08 X

Site NELT4

NELT4 #1 15N/03E-08L1S 

560–580

500–520 2,990 02/11/2012 16:00 PST 159.45 X 

320–480

Site CCT1

CCT1 #1 15N/03E-25L1S 875–895 2,688 03/24/2012 11:09 PDT 527.25 X

CCT1 #2 15N/03E-25L2S 730–750 2,688 03/24/2012 11:15 PDT 527.11 X

CCT1 #3 15N/03E-25L3S 645–665 2,688 03/24/2012 11:19 PDT 526.96 X

Site RDPS

RDPS #1 15N/06E-33L1S 

520–700

2,102 02/12/2012 13:34 PST 422.28 X

420–440

Site NELT5

NELT5 #1 16N/01E-35P1S 

820–840

640–780 3,243 02/29/2012 14:04 PDT 380.44 X 

480–520
Tables 127

Table 21. Summary of water-level data from monitoring and test wells, Fort Irwin National Training Center, California, 2012.

—Continued

[Altitudes were interpolated from a topographic map. Water levels are from the most recent complete set of static water levels for each site. All water-level data 

for each well may by accessed via NWISWeb links on the right side of the table. Status codes for water level measurements: Z, Other conditions existed that 

would affect the measured water level. Abbreviations: hh:mm, hour:minute; mm/dd/yyyy, month/day/year; NAVD 88, North American Vertical Datum of 1988; 

NWIS, U.S. Geological Survey National Water Information System; PDT, Pacific daylight time; PST, Pacific standard time; #, number]

Common 

name

State well 

number

Perforated 

interval 

(feet below 

land surface)

Altitude of 

land-surface 

datum 

(NAVD 88)

Water-level 

date 

(mm/dd/yyyy)

Water-level 

time 

(24 hour)

(hh:mm)

Water-level 

time datum

Water-level 

(feet below 

land surface)

Link to 

water levels 

in NWIS

Site NELT7

NELT7 #1 16N/02E-16P1S 780–800 3,172 03/05/2012 07:05 PST 293.82 X

NELT7 #2 16N/02E-16P2S 620–640 3,172 03/05/2012 07:12 PST 293.77 X

NELT7 #3 16N/02E-16P3S 380–400 3,172 03/05/2012 07:20 PST 279.82 X

Site NELT3

NELT3 #1 16N/02E-31H1S 

720–740

3,097 03/21/2012 14:34 PDT 208.17 X 540–580

360–460

260–300

Site NELT1

NELT1 #1 16N/02E-34Q1S 740–760 3,074 03/21/2012 13:20 PDT 207.39 X

NELT1 #2 16N/02E-34Q2S 280–300 3,074 03/21/2012 13:25 PDT 203.00 X

Site SBTW

SBTW #1 31S/46E-05B1M 

220–400

3,041 02/24/2012 11:54 PST 119.39 X

140–200

Site SBMW

SBMW #1 31S/46E-05B2M 270–290 3,044 02/24/2012 11:44 PST 120.04 X

SBMW #2 31S/46E-05B3M 130–150 3,044 02/24/2012 11:51 PST 119.88 X

Site SBMC

SBMC #1 31S/46E-05D1M 180–200 3,041 02/27/2012 12:10 PST 119.31 X

*

Status code Z: high salinity formational water affected the grout and it infiltrated the sand-pack, water level may not be representative. 

**Status code Z: well in a perched zone and was not able to be fully developed, water level may not be representative.
128 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued [Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking-water benchmark level and type. Values in the table that exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific conductance, chloride, sulfate, and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National 

Water Information System; pCi/L, picocurie per liter; PDT, Pacific 

daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Field parameters TDS and major ions

Dissolved 

oxygen 

(mg/L) 

(00300)

[na]

pH, 

unfiltered, 

field 

(standard 

units) 

(00400) 

[<6.5 or >8.5 

SMCL-US]

Specific 

conductance, 

unfiltered 

(μS/cm 

at 25°C) 

(00095) 

[1,600 

SMCL-CA]

Alkalinity, 

filtered, 

inflection 

point method, 

field 

(mg/L as 

CaCO3) 

(39086) 

[na]

Bicarbonate, 

filtered, 

inflection 

point, field 

(mg/L) 

(00453) 

[na]

Dissolved 

solids, 

residue on 

evaporation 

at 180°C, 

filtered 

(mg/L) 

(70300) 

[1,000 

SMCL-CA]

Calcium, 

filtered 

(mg/L) 

(00915) 

[na]

Magnesium, 

filtered 

(mg/L) 

(00925) 

[na]

LL04 #1 12N/03E-01M1S 970 08/02/2011 20:00 PDT BD 0.7 8.8 2,310

—

— 1,330 26.9 d 0.550 d

LL04B #1 12N/03E-01M4S 490 05/11/2011 12:15 PDT BD 0.6 8.5 2,350 36 42 1,450 38.9 1.66LL04B #2 12N/03E-01M5S 350 12/08/2011 13:30 PST BD 2.9 8.7 1,590 114 133 970 12.1 1.56CRTH2 #1 13N/05E-08B1S 940 12/06/2011 16:00 PST BD 0.1 8.2 1,320 103 123 840 34.4 10.5CRTH2 #2 13N/05E-08B2S 290 02/08/2012 16:00 PST BD 8.3 8.1 E 20,000 59

E 71 17,600 476 d 56.6 d

CRTH1 #1 13N/05E-28Q1S 1,260 03/03/2012 18:10 PST BD 0.3 8.8 2,750 31

E 34 1,760 37.1 d 0.353 d

CRTH1 #3 13N/05E-28Q3S 255 03/01/2012 17:00 PST BD 6.6 8.3 2,150 103 122 1,320 17.2 d 4.23 dGOLD2 #1 14N/01E-07R1S 440 03/21/2012 17:23 PDT BD 0.6 8.3 876 66

E 80 579 59.1 6.17

GOLD2 #2 14N/01E-07R2S 350 03/21/2012 19:13 PDT BD 2.1 8.4 1,050 89

E 105 738 36.9 4.44

BLA5 #1 14N/03E-26K1S 360 05/12/2011 12:50 PDT BD 4.4 8.5 837

—

— 551 5.62 1.46

BLA5 #3 14N/03E-26K3S 210 12/08/2011 16:30 PST BD 3.1 8.9 969 248

E 276 657 2.54 0.344

BLA5B #1 14N/03E-26K4S 270 05/12/2011 14:20 PDT BD 7.5 8.1 781

—

— 542 18.1 4.36

GOLD1 #1 15N/01E-28R1S 670 11/01/2011 14:10 PDT BD 5.9 7.5 3,500 80 98 2,230 187 d 80.7 dGOLD1 #2 15N/01E-28R2S 580 11/01/2011 15:20 PDT BD 2.1 7.8 3,210 167 202 2,020 129 d 48.2 dGOLD1 #3 15N/01E-28R3S 370 11/01/2011 11:45 PDT BD 6.7 7.5 3,630 84 102 2,370 200 d 75.3 dGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 11:30 PDT 2295 0.7 8.4 3,480 76 90 2,300 190 d 75.0 dGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 13:30 PDT 2360 0.6 7.8 3,440 75 90 2,300 191 d 77.4 dGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 15:30 PDT 2380 0.6 8.7 3,440 78

E 90 2,330 191 d 77.9 d

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 17:30 PDT 2590 1.4 7.6 3,390 79 96 2,280 184 d 78.5 dGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 14:00 PDT BD 6.4 7.4 3,490 79 96 2,340 195 d 77.2 d

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.
Tables 129

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued[Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking-water benchmark level and type. Values in the table that exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific conductance, chloride, sulfate, and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National Water Information System; pCi/L, picocurie per liter; PDT, Pacific daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Field parameters TDS and major ions

Dissolved 

oxygen 

(mg/L) 

(00300)

[na]

pH, 

unfiltered, 

field 

(standard 

units) 

(00400) 

[<6.5 or >8.5 

SMCL-US]

Specific 

conductance, 

unfiltered 

(μS/cm 

at 25°C) 

(00095) 

[1,600 

SMCL-CA]

Alkalinity, 

filtered, 

inflection 

point method, 

field 

(mg/L as 

CaCO3) 

(39086) 

[na]

Bicarbonate, 

filtered, 

inflection 

point, field 

(mg/L) 

(00453) 

[na]

Dissolved 

solids, 

residue on 

evaporation 

at 180°C, 

filtered 

(mg/L) 

(70300) 

[1,000 

SMCL-CA]

Calcium, 

filtered 

(mg/L) 

(00915) 

[na]

Magnesium, 

filtered 

(mg/L) 

(00925) 

[na]

NELT6 #1 15N/02E-05N1S 840 3/27/12 14:30 PDT 3480 — 8.9 883 193 219 590 24.8 d 7.13 d

NELT6 #1 15N/02E-05N1S 840 3/27/12 16:50 PDT 2498 — 8.9 695 171 195 512 25.9 7.12NELT6 #1 15N/02E-05N1S 840 3/27/12 19:00 PDT 2750 0.8 7.7 708 166 201 507 26.9 7.32NELT6 #1 15N/02E-05N1S 840 3/27/12 17:30 PDT BD 4.2 8.0 698 169 204 538 26.5 7.26

NELT2 #1 15N/03E-06L1S 800 11/03/2011 18:30 PDT BD 5.3 8.0 782 120 144 531 18.4 3.59

*NELT2 #2 15N/03E-06L2S 530 01/13/2012 19:00 PST BD — 9.4 1,040 294 264 **692 22.6 3.18NELT2 #3 15N/03E-06L3S 300 11/04/2011 13:30 PDT BD 9.6 8.3 784 149 177 580 13.6 2.24NELT4 #1 15N/03E-08L1S 580 02/10/2012 12:40 PST 2350 0.5 8.9 750 136 E 161 501 18.5 4.00NELT4 #1 15N/03E-08L1S 580 02/10/2012 14:45 PST 2410 0.6 8.9 760 136 E 156 504 19.4 4.13NELT4 #1 15N/03E-08L1S 580 02/10/2012 16:00 PST 2490 0.4 8.8 749 139 158 508 19.5 4.12NELT4 #1 15N/03E-08L1S 580 02/10/2012 17:20 PST 2550 0.4 8.9 758 140 168 508 18.9 4.01NELT4 #1 15N/03E-08L1S 580 02/10/2012 13:40 PST BD 7.0 8.0 753 137 166 509 18.9 4.09CCT1 #1 15N/03E-25L1S 895 03/24/2012 19:15 PDT BD 3.7 8.0 931 263 316 648 12.5 3.31CCT1 #2 15N/03E-25L2S 750 03/25/2012 16:15 PDT BD 7.5 8.1 1,020 — — 733 10.8 3.65RDPS #1 15N/06E-33L1S 740 06/10/2009 12:40 PDT 2520 — 8.1 1,160 — — 657 21.4 7.32RDPS #1 15N/06E-33L1S 740 06/10/2009 16:00 PDT 2587 0.3 8.1 1,230 — — 689 20.7 6.42RDPS #1 15N/06E-33L1S 740 06/11/2009 11:00 PDT 2620 — 8.9 1,070 — — 674 19.8 5.83RDPS #1 15N/06E-33L1S 740 06/11/2009 12:45 PDT 2650 0.3 8.9 1,110 — — 705 19.2 5.67RDPS #1 15N/06E-33L1S 740 06/11/2009 12:30 PDT BD 4.1 8.1 958 — — 613 17.8 6.04
130 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued [Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking-water benchmark level and type. Values in the table that exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific conductance, chloride, sulfate, and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National 

Water Information System; pCi/L, picocurie per liter; PDT, Pacific 

daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Field parameters TDS and major ions

Dissolved 

oxygen 

(mg/L) 

(00300)

[na]

pH, 

unfiltered, 

field 

(standard 

units) 

(00400) 

[<6.5 or >8.5 

SMCL-US]

Specific 

conductance, 

unfiltered 

(μS/cm 

at 25°C) 

(00095) 

[1,600 

SMCL-CA]

Alkalinity, 

filtered, 

inflection 

point method, 

field 

(mg/L as 

CaCO3) 

(39086) 

[na]

Bicarbonate, 

filtered, 

inflection 

point, field 

(mg/L) 

(00453) 

[na]

Dissolved 

solids, 

residue on 

evaporation 

at 180°C, 

filtered 

(mg/L) 

(70300) 

[1,000 

SMCL-CA]

Calcium, 

filtered 

(mg/L) 

(00915) 

[na]

Magnesium, 

filtered 

(mg/L) 

(00925) 

[na]

NELT5 #1 16N/01E-35P1S 840 03/06/2012 14:00 PST 3530 1.2 8.7 790 140 161 579 26.2 5.85

NELT5 #1 16N/01E-35P1S 840 03/06/2012 18:00 PST 2620 0.9 8.7 670 140

E 165 504 29.1 4.22

NELT5 #1 16N/01E-35P1S 840 03/06/2012 19:30 PST 2710 0.6 8.8 672 138 166 519 31.4 4.42NELT5 #1 16N/01E-35P1S 840 03/06/2012 20:30 PST 2800 1.0 8.5 675 144 173 510 29.2 4.44NELT5 #1 16N/01E-35P1S 840 03/06/2012 17:30 PST BD 6.1 7.9 685 139 168 512 29.8 4.28NELT7 #1 16N/02E-16P1S 800 01/12/2012 17:05 PST BD 1.7 9.1 691 133

E 136 431 2.58 0.234

NELT7 #2 16N/02E-16P2S 640 01/12/2012 16:40 PST BD 0.2 9.2 484 125 123 336 2.10 0.219NELT7 #3 16N/02E-16P3S 400 01/12/2012 18:35 PST BD 9.1 8.9 488 149 166 379 4.26 0.545NELT3 #1 16N/02E-31H1S 740 08/04/2011 11:30 PDT 3300 7.9 7.9 702

—

— 506 21.3 3.02

NELT3 #1 16N/02E-31H1S 740 08/04/2011 03:00 PDT 2355 0.2 8.8 792

—

—

— 26.9 5.50

NELT3 #1 16N/02E-31H1S 740 08/04/2011 04:30 PDT 2535 0.2 8.7 754

—

—

— 28.0 7.12

NELT3 #1 16N/02E-31H1S 740 08/04/2011 05:30 PDT 2715 0.2 8.7 852

—

— 623 34.9 8.97

NELT3 #1 16N/02E-31H1S 740 08/04/2011 10:30 PDT BD 4.4 7.8 808

—

— 588 28.4 5.70

NELT1 #1 16N/02E-34Q1S 760 11/03/2011 15:30 PDT BD 2.0 8.0 958 142 172 660 16.0 2.54NELT1 #2 16N/02E-34Q2S 300 11/03/2011 17:00 PDT BD 7.1 8.2 616 134 161 442 4.92 0.946SBTW #1 31S/46E-05B1M 400 03/03/2010 10:00 PST BD 2.9 7.8 367

—

— 289 17.2 2.81

SBMW #1 31S/46E-05B2M 290 03/03/2010 14:10 PST BD 4.1 7.9 442 112 135 321 16.2 3.12SBMW #2 31S/46E-05B3M 150 03/03/2010 17:30 PST BD 7.3 8.0 525 107 129 396 16.8 4.78SBMC #1 31S/46E-05D1M 200 03/03/2010 16:55 PST BD

— 8.2 594 115 139 415 13.1 4.07
Tables 131

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued[Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National Water Information System; pCi/L, picocurie per liter; PDT, Pacific daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

TDS and major ions—Continued Trace elements

Potassium, 

filtered 

(mg/L) 

(00935) 

[na]

Sodium, 

filtered 

(mg/L)

(00930) 

[na]

Bromide, 

filtered 

(mg/L) 

(71870) 

[na]

Chloride, 

filtered 

(mg/L) 

(00940) 

[500 

SMCL-CA]

Fluoride, 

filtered 

(mg/L) 

(00950) 

[2 MCL-CA]

Silica, 

filtered 

(mg/L) 

(00955) 

[na]

Sulfate, 

filtered 

(mg/L) 

(00945) 

[500 

SMCL-CA]

Aluminum, 

filtered 

(μg/L) 

(01106) 

[1,000 

MCL-CA]

Barium, 

filtered 

(μg/L) 

(01005) 

[1,000 

MCL-CA]

Chromium, 

filtered 

(μg/L) 

(01030) 

[50 MCL-CA]

LL04 #1 12N/03E-01M1S 970 08/02/2011 20:00 PDT BD 3.21 d 435 d 1.76 d 439 d 3.54 d 16.1 d 377 d 42.6 16.0 d —

LL04B #1 12N/03E-01M4S 490 05/11/2011 12:15 PDT BD 5.30 449 d 1.35 d 374 d 1.19 13.9 d 481 d 14.9 19.1 —LL04B #2 12N/03E-01M5S 350 12/08/2011 13:30 PST BD 4.16 309 0.784 d 218 1.79 18.4 d 277 79.5 d 7.4 —CRTH2 #1 13N/05E-08B1S 940 12/06/2011 16:00 PST BD 8.47 227 0.300 132 1.66 51.6 d 304 d 12.2 n,d 15.0 —CRTH2 #2 13N/05E-08B2S 290 02/08/2012 16:00 PST BD 54.7 d 4,700 d 1.52 d 2,130 d 2.27 d 31.2 d 9,760 d < 22.0 d 21.4 d —CRTH1 #1 13N/05E-28Q1S 1,260 03/03/2012 18:10 PST BD 5.02 d 536 d 1.21 d 425 d 12.7 d 36.8 d 649 d 24.9 d 16.2 d —CRTH1 #3 13N/05E-28Q3S 255 03/01/2012 17:00 PST BD 5.70 d 444 d 0.993 d 350 d 3.64 d 42.7 d 369 d 10.0 9.7 d —GOLD2 #1 14N/01E-07R1S 440 03/21/2012 17:23 PDT BD 5.96 111 0.326 73.0 1.04 27.8 d 247 9.1 10.7 —GOLD2 #2 14N/01E-07R2S 350 03/21/2012 19:13 PDT BD 5.38 168 0.442 d 96.6 1.10 28.3 d 265 276 31.3 —BLA5 #1 14N/03E-26K1S 360 05/12/2011 12:50 PDT BD 6.48 166 0.328 67.4 2.97 d 68.3 d 117 28.4 2.9 —BLA5 #3 14N/03E-26K3S 210 12/08/2011 16:30 PST BD 3.40 215 0.317 62.4 4.30 d 80.5 d 116 28.9 3.6 —BLA5B #1 14N/03E-26K4S 270 05/12/2011 14:20 PDT BD 10.6 143 0.324 64.5 3.06 d 79.6 d 113 5.1 21.0 —GOLD1 #1 15N/01E-28R1S 670 11/01/2011 14:10 PDT BD 33.8 d 381 d 1.69 d 880 d 0.40 83.9 d 418 d < 4.4 d 25.6 d —GOLD1 #2 15N/01E-28R2S 580 11/01/2011 15:20 PDT BD 27.8 d 416 d 1.37 d 691 d 0.87 74.0 d 433 d < 11.0 d 33.5 d —GOLD1 #3 15N/01E-28R3S 370 11/01/2011 11:45 PDT BD 35.8 d 403 d 1.72 d 915 d 0.45 88.0 d 433 d < 4.4 d 29.0 d —GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 11:30 PDT 2295 33.9 d 382 d 1.72 d 866 d 0.46 84.4 d 415 d 5.6 n,d 26.0 d —GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 13:30 PDT 2360 34.9 d 386 d 1.69 d 861 d 0.43 83.7 d 414 d < 11.0 d 25.5 d —GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 15:30 PDT 2380 34.8 d 386 d 1.69 d 862 d 0.42 83.4 d 415 d < 4.4 d 25.4 d —GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 17:30 PDT 2590 33.9 d 370 d 1.67 d 842 d 0.42 81.8 d 404 d < 11.0 d 23.5 d —
132 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued [Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National 

Water Information System; pCi/L, picocurie per liter; PDT, Pacific 

daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

TDS and major ions—Continued Trace elements

Potassium, 

filtered 

(mg/L) 

(00935) 

[na]

Sodium, 

filtered 

(mg/L)

(00930) 

[na]

Bromide, 

filtered 

(mg/L) 

(71870) 

[na]

Chloride, 

filtered 

(mg/L) 

(00940) 

[500 

SMCL-CA]

Fluoride, 

filtered 

(mg/L) 

(00950) 

[2 MCL-CA]

Silica, 

filtered 

(mg/L) 

(00955) 

[na]

Sulfate, 

filtered 

(mg/L) 

(00945) 

[500 

SMCL-CA]

Aluminum, 

filtered 

(μg/L) 

(01106) 

[1,000 

MCL-CA]

Barium, 

filtered 

(μg/L) 

(01005) 

[1,000 

MCL-CA]

Chromium, 

filtered 

(μg/L) 

(01030) 

[50 MCL-CA]

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 14:00 PDT BD 36.0 d 386 d 1.72 d 863

d 0.45 84.7 d 415 d < 11.0 d 25.5 d —

NELT6 #1 15N/02E-05N1S 840 3/27/12 14:30 PDT 3480 16.1 d 142 d 0.368

—

— 71.6 d

— 44.3 d 31 d

—

NELT6 #1 15N/02E-05N1S 840 3/27/12 16:50 PDT 2498 19.1 96.9 0.271

—

—

—

— 48.8 47.5

—

NELT6 #1 15N/02E-05N1S 840 3/27/12 19:00 PDT 2750 21.0 105 0.273 64.3 0.45 89.6 d 78.4 19.3 42.0

—

NELT6 #1 15N/02E-05N1S 840 3/27/12 17:30 PDT BD 19.9 101 0.272 63.4 0.44 87.6 d 75.9 6.8 43.4

—

NELT2 #1 15N/03E-06L1S 800 11/03/2011 18:30 PDT BD 14.6 137 0.373 78.1 3.40

d 82.8 d 97.3 45.4 d 34.3

—

*NELT2 #2 15N/03E-06L2S 530 01/13/2012 19:00 PST BD 7.42 219 0.359 74.6 4.58 82.5 d 149 3,580

d 65.8 6.6

NELT2 #3 15N/03E-06L3S 300 11/04/2011 13:30 PDT BD 8.08 149 0.295 47.6 3.76

d 96.4 d 105 94.4 d 15.2

—

NELT4 #1 15N/03E-08L1S 580 02/10/2012 12:40 PST 2350 16.5 114 d 0.399 77.6 3.07

d 76.7 d 90.4 8.1 34.6

—

NELT4 #1 15N/03E-08L1S 580 02/10/2012 14:45 PST 2410 16.6 116 d 0.380 78.0 3.08

d 76.9 d 90.5 3.5 n 32.8

—

NELT4 #1 15N/03E-08L1S 580 02/10/2012 16:00 PST 2490 16.4 113 d 0.381 77.6 3.06

d 75.3 d 90.5 2.7 n 46.2

—

NELT4 #1 15N/03E-08L1S 580 02/10/2012 17:20 PST 2550 17.2 118 d 0.381 78.0 3.07

d 71.8 d 90.5 2.7 n 29.6

—

NELT4 #1 15N/03E-08L1S 580 02/10/2012 13:40 PST BD 16.1 127 d 0.377 77.2 3.11

d 77.6 d 90.1 10.4 39.3

—

CCT1 #1 15N/03E-25L1S 895 03/24/2012 19:15 PDT BD 12.3 186 0.288 60.2 4.31

d 81.8 d 94.3 51.1 d 42.4

—

CCT1 #2 15N/03E-25L2S 750 03/25/2012 16:15 PDT BD 12.7 198 0.291 d 63.1 3.96

d 78.2 d 94.1 61.8 34.5

—

RDPS #1 15N/06E-33L1S 740 06/10/2009 12:40 PDT 2520 6.61 173 0.378 110 3.73

d 60.3 d 125 29.1 44.8 4.2

RDPS #1 15N/06E-33L1S 740 06/10/2009 16:00 PDT 2587 6.81 196 0.394 124 3.88

d 59.1 d 133 15.6 43.9 7.7

RDPS #1 15N/06E-33L1S 740 06/11/2009 11:00 PDT 2620 6.59 202 0.397 126 4.88

d 54.9 d 130

E 2.8 n 38.7 8.4

RDPS #1 15N/06E-33L1S 740 06/11/2009 12:45 PDT 2650 6.24 201 0.397 130 4.76

d 54.3 d 133

E 3.6 n 34.5 9.0
Tables 133

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued[Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National Water Information System; pCi/L, picocurie per liter; PDT, Pacific daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

TDS and major ions—Continued Trace elements

Potassium, 

filtered 

(mg/L) 

(00935) 

[na]

Sodium, 

filtered 

(mg/L)

(00930) 

[na]

Bromide, 

filtered 

(mg/L) 

(71870) 

[na]

Chloride, 

filtered 

(mg/L) 

(00940) 

[500 

SMCL-CA]

Fluoride, 

filtered 

(mg/L) 

(00950) 

[2 MCL-CA]

Silica, 

filtered 

(mg/L) 

(00955) 

[na]

Sulfate, 

filtered 

(mg/L) 

(00945) 

[500 

SMCL-CA]

Aluminum, 

filtered 

(μg/L) 

(01106) 

[1,000 

MCL-CA]

Barium, 

filtered 

(μg/L) 

(01005) 

[1,000 

MCL-CA]

Chromium, 

filtered 

(μg/L) 

(01030) 

[50 MCL-CA]

RDPS #1 15N/06E-33L1S 740 06/11/2009 12:30 PDT BD 6.02 163 0.344 94.9 3.96 d 61.0 d 113 E 2.4 n 39.2 5.0

NELT5 #1 16N/01E-35P1S 840 03/06/2012 14:00 PST 3530 17.3 133 0.367 63.5 0.75 78.3 d 110 < 6.6 d 24.4 —

NELT5 #1 16N/01E-35P1S 840 03/06/2012 18:00 PST 2620 20.0 100 0.342 54.6 0.82 95.4 d 92.1 3.5 n 36.4 —NELT5 #1 16N/01E-35P1S 840 03/06/2012 19:30 PST 2710 21.9 107 0.342 53.9 0.79 96.5 d 92.4 < 6.6 d 44.0 —NELT5 #1 16N/01E-35P1S 840 03/06/2012 20:30 PST 2800 20.1 100 0.343 55.5 0.77 97.5 d 92.0 < 6.6 d 35.6 —NELT5 #1 16N/01E-35P1S 840 03/06/2012 17:30 PST BD 20.2 102 0.335 53.8 0.82 95.8 d 92.4 8.1 n,d 36.1 —NELT7 #1 16N/02E-16P1S 800 01/12/2012 17:05 PST BD 2.39 142 0.306 52.7 14.6 d 39.9 d 75.0 174 3.2 —NELT7 #2 16N/02E-16P2S 640 01/12/2012 16:40 PST BD 1.98 102 0.165 23.8 11.9 d 40.3 d 36.5 201 2.0 —NELT7 #3 16N/02E-16P3S 400 01/12/2012 18:35 PST BD 5.03 103 0.139 18.6 9.26 d 86.3 d 34.4 720 6.7 —NELT3 #1 16N/02E-31H1S 740 08/04/2011 11:30 PDT 3300 13.1 115 0.368 60.9 1.18 83.1 d 71.0 6.8 30.0 —NELT3 #1 16N/02E-31H1S 740 08/04/2011 03:00 PDT 2355 12.8 115 0.457 d 70.0 0.81 83.3 d 74.9 2.6 n 35.5 —NELT3 #1 16N/02E-31H1S 740 08/04/2011 04:30 PDT 2535 13.8 107 0.420 d 62.2 0.65 88.4 d 68.3 5.0 46.9 —NELT3 #1 16N/02E-31H1S 740 08/04/2011 05:30 PDT 2715 17.4 116 0.503 d 81.8 0.58 90.2 d 93.5 4.7 34.8 —NELT3 #1 16N/02E-31H1S 740 08/04/2011 10:30 PDT BD 13.5 125 0.457 d 70.2 0.78 82.5 d 75.8 3.2 n 43.0 —NELT1 #1 16N/02E-34Q1S 760 11/03/2011 15:30 PDT BD 8.94 187 0.214 33.5 4.56 d 80.4 d 215 14.7 d 17.9 —NELT1 #2 16N/02E-34Q2S 300 11/03/2011 17:00 PDT BD 7.91 129 0.217 31.4 4.88 d 75.9 d 63.5 97.7 d 11.8 —SBTW #1 31S/46E-05B1M 400 03/03/2010 10:00 PST BD 8.29 47.5 0.122 20.5 0.60 71.5 35.9 < 3.4 58.9 1.6

SBMW #1 31S/46E-05B2M 290 03/03/2010 14:10 PST BD 8.19 67.7 0.135 25.6 0.54 65.3 d 49.4 18.3 27.2 2.1SBMW #2 31S/46E-05B3M 150 03/03/2010 17:30 PST BD 9.05 77.2 0.165 38.2 0.71 84.1 d 67.1 28.6 27.0 1.7SBMC #1 31S/46E-05D1M 200 03/03/2010 16:55 PST BD 7.46 96.5 0.166 29.8 0.64 77.3 d 96.5 32.0 9.4 2.1
134 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued [Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National 

Water Information System; pCi/L, picocurie per liter; PDT, Pacific 

daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Trace elements—Continued Stable isotopes

Iron, 

filtered 

(μg/L) 

(01046) 

[300 

SMCL-CA]

Lithium, 

filtered 

(μg/L) 

(01130) 

[na]

Manganese, 

filtered 

(μg/L) 

(01056) 

[50 SMCLCA]

Strontium, 

filtered 

(μg/L) 

(01080) 

[4,000 

HAL-US]

Arsenic, 

filtered 

(μg/L) 

(01000) 

[10 

MCL-US]

Boron, 

filtered 

(μg/L) 

(01020) 

[1,000 

NL-CA]

Iodide, 

filtered 

(mg/L) 

(71865) 

[na]

δ

Deuterium, 

unfiltered 

(per mil) 

(82082) 

[na]

δ 

Oxygen-18, 

unfiltered 

(per mil) 

(82085) 

[na]

δ

Carbon-13, 

unfiltered 

(per mil) 

(82081) 

[na]

LL04 #1 12N/03E-01M1S 970 08/02/2011 20:00 PDT BD 14.7 d 77.3 d 21.0 d 772 d 2.4 205 d 0.137 d –89.70 –10.45 –8.70

LL04B #1 12N/03E-01M4S 490 05/11/2011 12:15 PDT BD

< 3.2 62.1 29.9 1,340 6.3 1,840

d 0.103 d –92.80 –10.60 –9.70

LL04B #2 12N/03E-01M5S 350 12/08/2011 13:30 PST BD 14.9 66.4 1.81 397 36.3

d 2,550

d 0.070 d –96.20 –11.47 –8.73

CRTH2 #1 13N/05E-08B1S 940 12/06/2011 16:00 PST BD

< 3.2 145 10.3 1,530 36.9

d 1,510

d 0.148 d –89.40 –11.07 –8.78

CRTH2 #2 13N/05E-08B2S 290 02/08/2012 16:00 PST BD 44.7 n,d 6,500 d 171

d 9,240

d 71.4

d 9,780

d 2.34 d —

—

—

CRTH1 #1 13N/05E-28Q1S 1,260 03/03/2012 18:10 PST BD 26.4 d E 650 d 5.48 d 1,200 d 148

d 4,490

d 0.321 d –89.70 –10.48 –7.41

CRTH1 #3 13N/05E-28Q3S 255 03/01/2012 17:00 PST BD 11.0 n,d E 64.0 d 1.15 d 773 d 19.4 2,070

d 0.011 d –96.20 –11.34 –5.69

GOLD2 #1 14N/01E-07R1S 440 03/21/2012 17:23 PDT BD 7.3 E 11.2 22.1 673 1.1 590 d 0.079 d –97.70 –12.45 –9.34GOLD2 #2 14N/01E-07R2S 350 03/21/2012 19:13 PDT BD 146 E 13.7 48.1 460 1.7 578 d 0.069 d –99.80 –12.55 –10.21BLA5 #1 14N/03E-26K1S 360 05/12/2011 12:50 PDT BD 11.8 18.4 0.73 94.2 33.3 999 d 0.008 –95.10 –12.00 –8.12BLA5 #3 14N/03E-26K3S 210 12/08/2011 16:30 PST BD 18.5 14.8 0.62 45.4 51.9 967 d 0.010 –94.70 –11.87 –7.11BLA5B #1 14N/03E-26K4S 270 05/12/2011 14:20 PDT BD 4.7 n 33.9 0.81 306 14.5 995 d 0.005 –95.00 –12.02 –8.30GOLD1 #1 15N/01E-28R1S 670 11/01/2011 14:10 PDT BD

< 6.4 d 140 d 1.28 d 1,890 d 5.2 d 1,010

d 0.013 d –95.80 –11.74 –7.35

GOLD1 #2 15N/01E-28R2S 580 11/01/2011 15:20 PDT BD

< 6.4 d 124 d 29.3 d 1,220 d 9.3 d 977 d 0.068 d –95.40 –11.68 –7.47

GOLD1 #3 15N/01E-28R3S 370 11/01/2011 11:45 PDT BD

< 6.4 d 150 d 3.37 d 1,840 d 7.3 d 1,120

d 0.017 d –95.40 –11.89 –7.68

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 11:30 PDT 2295 12.5 n,d E 77.4 d 2.10 d 1,710 d 4.8 d 1,070

d

— –95.70 –11.77

—

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 13:30 PDT 2360 9.3 n,d E 73.4 d 1.56 d 1,750 d 4.7 d 1,080

d

— –95.80 –11.73 –5.42

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 15:30 PDT 2380 15.6 d E 75.3 d 1.27 d 1,760 d 4.8 d 1,080

d

— –94.60 –11.74 –6.30

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 17:30 PDT 2590 7.0 n,d E 74.9 d 1.38 d 1,730 d 4.1 d 1,030

d

— –95.50 –11.77 –7.35
Tables 135

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued[Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National Water Information System; pCi/L, picocurie per liter; PDT, Pacific daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Trace elements—Continued Stable isotopes

Iron, 

filtered 

(μg/L) 

(01046) 

[300 

SMCL-CA]

Lithium, 

filtered 

(μg/L) 

(01130) 

[na]

Manganese, 

filtered 

(μg/L) 

(01056) 

[50 SMCLCA]

Strontium, 

filtered 

(μg/L) 

(01080) 

[4,000 

HAL-US]

Arsenic, 

filtered 

(μg/L) 

(01000) 

[10 

MCL-US]

Boron, 

filtered 

(μg/L) 

(01020) 

[1,000 

NL-CA]

Iodide, 

filtered 

(mg/L) 

(71865) 

[na]

δ

Deuterium, 

unfiltered 

(per mil) 

(82082) 

[na]

δ 

Oxygen-18, 

unfiltered 

(per mil) 

(82085) 

[na]

δ

Carbon-13, 

unfiltered 

(per mil) 

(82081) 

[na]

GOLD1-T #1 15N/01E-28R4S 680 03/23/2012 14:00 PDT BD 111 d E 73.9 d 1.82 d 1,800 d 4.6 d 1,090 d — –95.30 –11.75 –7.36

NELT6 #1 15N/02E-05N1S 840 3/27/12 14:30 PDT 3480 127 d E 39.6 d 6.17 d 279 d 13.6 d 850 d < 0.001 –102 –13.04 —

NELT6 #1 15N/02E-05N1S 840 3/27/12 16:50 PDT 2498 87.5 E 40.4 4.99 285 18.1 818 d < 0.001 –105 –13.45 —NELT6 #1 15N/02E-05N1S 840 3/27/12 19:00 PDT 2750 12.9 E 41.6 0.95 299 17.5 d 829 d 0.008 –104 –13.48 —NELT6 #1 15N/02E-05N1S 840 3/27/12 17:30 PDT BD 83.0 E 41.8 10.8 296 15.3 837 d 0.015 –106 –13.52 —

NELT2 #1 15N/03E-06L1S 800 11/03/2011 18:30 PDT BD 22.2 82.7 6.64 359 45.2 d 1,250 d 0.010 –101 –12.73 –8.05

*NELT2 #2 15N/03E-06L2S 530 01/13/2012 19:00 PST BD 2,330 32.5 118 136 69.0 1,830 d — –103 –12.85 –9.52NELT2 #3 15N/03E-06L3S 300 11/04/2011 13:30 PDT BD 53.2 110 4.68 223 26.3 d 1,300 d 0.007 –99.90 –12.94 –8.19NELT4 #1 15N/03E-08L1S 580 02/10/2012 12:40 PST 2350 8.8 76.5 1.64 357 38.4 1,160 d 0.004 — — —

NELT4 #1 15N/03E-08L1S 580 02/10/2012 14:45 PST 2410 4.1 n 76.2 0.85 367 38.7 1,160 d 0.004 — — —NELT4 #1 15N/03E-08L1S 580 02/10/2012 16:00 PST 2490 < 3.2 77.0 1.26 374 38.7 1,160 d 0.004 — — –7.35

NELT4 #1 15N/03E-08L1S 580 02/10/2012 17:20 PST 2550 4.4 n 77.8 0.85 373 37.6 1,160 d 0.004 — — –6.97NELT4 #1 15N/03E-08L1S 580 02/10/2012 13:40 PST BD 37.2 77.2 1.79 360 38.2 1,150 d 0.004 — — –7.61CCT1 #1 15N/03E-25L1S 895 03/24/2012 19:15 PDT BD 23.3 E 50.9 122 193 25.9 d 1,360 d 0.063 d –97.90 –12.32 –6.66CCT1 #2 15N/03E-25L2S 750 03/25/2012 16:15 PDT BD 47.9 E 48.6 64.0 165 29.6 1,390 d 0.122 d –94.70 –12.10 –9.86RDPS #1 15N/06E-33L1S 740 06/10/2009 12:40 PDT 2520 84.7 122 13.0 792 50.9 1,320 d 0.058 d –95.00 –12.06 —

RDPS #1 15N/06E-33L1S 740 06/10/2009 16:00 PDT 2587 39.4 135 11.3 776 68.1 1,380 d 0.063 d –95.60 –12.08 —RDPS #1 15N/06E-33L1S 740 06/11/2009 11:00 PDT 2620 5.9 142 12.1 824 63.4 1,340 d 0.049 d –95.50 –12.17 —RDPS #1 15N/06E-33L1S 740 06/11/2009 12:45 PDT 2650 10.4 143 9.06 795 72.1 1,440 d 0.050 d –94.70 –12.10 –6.13
136 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued [Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National 

Water Information System; pCi/L, picocurie per liter; PDT, Pacific 

daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Trace elements—Continued Stable isotopes

Iron, 

filtered 

(μg/L) 

(01046) 

[300 

SMCL-CA]

Lithium, 

filtered 

(μg/L) 

(01130) 

[na]

Manganese, 

filtered 

(μg/L) 

(01056) 

[50 SMCLCA]

Strontium, 

filtered 

(μg/L) 

(01080) 

[4,000 

HAL-US]

Arsenic, 

filtered 

(μg/L) 

(01000) 

[10 

MCL-US]

Boron, 

filtered 

(μg/L) 

(01020) 

[1,000 

NL-CA]

Iodide, 

filtered 

(mg/L) 

(71865) 

[na]

δ

Deuterium, 

unfiltered 

(per mil) 

(82082) 

[na]

δ 

Oxygen-18, 

unfiltered 

(per mil) 

(82085) 

[na]

δ

Carbon-13, 

unfiltered 

(per mil) 

(82081) 

[na]

RDPS #1 15N/06E-33L1S 740 06/11/2009 12:30 PDT BD 235 118 15.0 670 58.7 1,280

d 0.038 d –95.60 –12.14 –7.22

NELT5 #1 16N/01E-35P1S 840 03/06/2012 14:00 PST 3530 300 E 44.1 18.2 361 21.0 1,040

d 0.050 d –100 –12.50

—

NELT5 #1 16N/01E-35P1S 840 03/06/2012 18:00 PST 2620 5.4 n E 48.1 4.41 428 43.4 1,120

d 0.004 –104 –12.79

—

NELT5 #1 16N/01E-35P1S 840 03/06/2012 19:30 PST 2710 5.5 n E 49.9 4.50 465 41.4 1,050

d 0.003 –104 –12.93

—

NELT5 #1 16N/01E-35P1S 840 03/06/2012 20:30 PST 2800 5.6 n E 48.8 1.86 436 41.4 1,090

d 0.004 –104 –12.90 –7.59

NELT5 #1 16N/01E-35P1S 840 03/06/2012 17:30 PST BD 422 E 48.8 8.94 433 40.7 1,100

d 0.005 –104 –12.80 –7.80

NELT7 #1 16N/02E-16P1S 800 01/12/2012 17:05 PST BD 71.8 274 d 4.02 27.5 150 1,110

d 0.048 d –102 –13.11 –7.75

NELT7 #2 16N/02E-16P2S 640 01/12/2012 16:40 PST BD 88.7 206 5.23 23.4 179 1,260

d 0.061 d –102 –13.38 –8.27

NELT7 #3 16N/02E-16P3S 400 01/12/2012 18:35 PST BD 306 109 11.1 87.0 44.2 696 d 0.002 n –105 –13.66 –9.26NELT3 #1 16N/02E-31H1S 740 08/04/2011 11:30 PDT 3300 14.2 95.6 1.32 389 51.0 1,280

d 0.004 –104 –12.93 –7.06

NELT3 #1 16N/02E-31H1S 740 08/04/2011 03:00 PDT 2355 9.5 93.3 10.3 412 31.0 964 d 0.002 –102 –12.80

—

NELT3 #1 16N/02E-31H1S 740 08/04/2011 04:30 PDT 2535 9.1 85.3 1.98 353 31.0 919 d 0.003 –103 –13.01 –7.69

NELT3 #1 16N/02E-31H1S 740 08/04/2011 05:30 PDT 2715 20.2 105 12.2 427 27.7 1,080

d 0.005 –103 –12.74 –6.47

NELT3 #1 16N/02E-31H1S 740 08/04/2011 10:30 PDT BD 57.2 101 1.11 440 34.5 1,000

d 0.002 –102 –12.88 –8.13

NELT1 #1 16N/02E-34Q1S 760 11/03/2011 15:30 PDT BD 4.7 n 61.0 0.91 181 59.0

d 1,690

d 0.020 –104 –12.77 –8.12

NELT1 #2 16N/02E-34Q2S 300 11/03/2011 17:00 PDT BD 33.8 56.6 0.75 63.4 70.8

d 1,110

d 0.009 –103 –13.00 –6.92

SBTW #1 31S/46E-05B1M 400 03/03/2010 10:00 PST BD 16.3 15.0 1.61 186 15.0 309 E 0.002 n –98.30 –12.72 –9.48

SBMW #1 31S/46E-05B2M 290 03/03/2010 14:10 PST BD 6.1 25.6 3.44 175 13.5 355 0.014 –97.80 –12.46 –9.08

SBMW #2 31S/46E-05B3M 150 03/03/2010 17:30 PST BD 12.3 27.7 3.74 178 14.8 355 0.005 –94.40 –12.15 –6.19SBMC #1 31S/46E-05D1M 200 03/03/2010 16:55 PST BD 10.3 22.9 2.54 140 23.4 345 0.019 –96.60 –12.41 –7.15
Tables 137

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued[Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National Water Information System; pCi/L, picocurie per liter; PDT, Pacific daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Radioisotopes Nutrients

Carbon-14, 

filtered 

(percent modern) 

(49933) 

[na]

Tritium, 

unfiltered 

(pCi/L) 

(07000) 

[20,000 MCL-CA]

Ammonia, 

filtered 

(mg/L as N) 

(00608) 

[30 HAL-US]

Nitrate + nitrite, 

filtered 

(mg/L as N) 

(00631) 

[10 MCL-US]

Nitrite, 

filtered 

(mg/L as N) 

(00613) 

[1 MCL-US]

NWIS 

water-quality 

link

LL04 #1 12N/03E-01M1S 970 08/02/2011 20:00 PDT BD 53.46 < 0.4 — — — X

LL04B #1 12N/03E-01M4S 490 05/11/2011 12:15 PDT BD 12.00 < 0.3 0.092 12.7 d 0.251 d XLL04B #2 12N/03E-01M5S 350 12/08/2011 13:30 PST BD 20.06 < 0.5 0.046 8.49 d 0.007 XCRTH2 #1 13N/05E-08B1S 940 12/06/2011 16:00 PST BD 9.87 < 0.5 0.017 n 5.64 d 0.015 XCRTH2 #2 13N/05E-08B2S 290 02/08/2012 16:00 PST BD — — 0.351 0.384 0.185 XCRTH1 #1 13N/05E-28Q1S 1,260 03/03/2012 18:10 PST BD 11.06 < 0.4 0.054 < 0.040 0.003 XCRTH1 #3 13N/05E-28Q3S 255 03/01/2012 17:00 PST BD 4.95 < 0.5 < 0.010 4.64 < 0.001 XGOLD2 #1 14N/01E-07R1S 440 03/21/2012 17:23 PDT BD 8.37 — < 0.010 < 0.040 < 0.001 XGOLD2 #2 14N/01E-07R2S 350 03/21/2012 19:13 PDT BD 18.37 — < 0.010 0.062 n 0.033 XBLA5 #1 14N/03E-26K1S 360 05/12/2011 12:50 PDT BD 10.83 < 0.3 < 0.010 4.64 0.004 XBLA5 #3 14N/03E-26K3S 210 12/08/2011 16:30 PST BD 6.92 < 0.4 < 0.010 5.26 d 0.002 XBLA5B #1 14N/03E-26K4S 270 05/12/2011 14:20 PDT BD 11.29 < 0.3 < 0.010 4.67 0.003 XGOLD1 #1 15N/01E-28R1S 670 11/01/2011 14:10 PDT BD 22.26 < 0.4 0.016 n 5.23 d 0.002 XGOLD1 #2 15N/01E-28R2S 580 11/01/2011 15:20 PDT BD 18.71 < 0.4 0.044 3.30 0.272 d XGOLD1 #3 15N/01E-28R3S 370 11/01/2011 11:45 PDT BD 22.87 — 0.017 n 5.09 d 0.004 XGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 11:30 PDT 2295 — — < 0.010 5.58 d < 0.001 XGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 13:30 PDT 2360 22.49 — < 0.010 5.54 d < 0.001 XGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 15:30 PDT 2380 22.22 — < 0.010 5.59 d < 0.001 XGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 17:30 PDT 2590 22.51 — < 0.010 5.62 d < 0.001 XGOLD1-T #1 15N/01E-28R4S 680 03/23/2012 14:00 PDT BD 21.82 — < 0.010 5.59 d < 0.001 XNELT6 #1 15N/02E-05N1S 840 3/27/12 14:30 PDT 3480 — — < 0.010 1.97 0.032 XNELT6 #1 15N/02E-05N1S 840 3/27/12 16:50 PDT 2498 — — < 0.010 1.73 0.002 n X
138 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued [Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National 

Water Information System; pCi/L, picocurie per liter; PDT, Pacific 

daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Radioisotopes Nutrients

Carbon-14, 

filtered 

(percent modern) 

(49933) 

[na]

Tritium, 

unfiltered 

(pCi/L) 

(07000) 

[20,000 MCL-CA]

Ammonia, 

filtered 

(mg/L as N) 

(00608) 

[30 HAL-US]

Nitrate + nitrite, 

filtered 

(mg/L as N) 

(00631) 

[10 MCL-US]

Nitrite, 

filtered 

(mg/L as N) 

(00613) 

[1 MCL-US]

NWIS 

water-quality 

link

NELT6 #1 15N/02E-05N1S 840 3/27/12 19:00 PDT 2750

—

— < 0.010 1.79 0.002

X

NELT6 #1 15N/02E-05N1S 840 3/27/12 17:30 PDT BD

—

— < 0.010 1.74 0.003

X

NELT2 #1 15N/03E-06L1S 800 11/03/2011 18:30 PDT BD 12.26

— 0.018 n 2.69 0.006

X

*NELT2 #2 15N/03E-06L2S 530 01/13/2012 19:00 PST BD 4.46

—

—

—

—

X

NELT2 #3 15N/03E-06L3S 300 11/04/2011 13:30 PDT BD 12.49

— 0.013 n 4.55 0.009

X

NELT4 #1 15N/03E-08L1S 580 02/10/2012 12:40 PST 2350

—

—

< 0.010 2.99

< 0.001

X

NELT4 #1 15N/03E-08L1S 580 02/10/2012 14:45 PST 2410

—

—

< 0.010 2.97

< 0.001

X

NELT4 #1 15N/03E-08L1S 580 02/10/2012 16:00 PST 2490 19.80 < 0.3

< 0.010 3.00

< 0.001

X

NELT4 #1 15N/03E-08L1S 580 02/10/2012 17:20 PST 2550 20.50 < 0.3

< 0.010 2.93 0.001 n X

NELT4 #1 15N/03E-08L1S 580 02/10/2012 13:40 PST BD 18.77 0.5

< 0.010 2.98

< 0.001

X

CCT1 #1 15N/03E-25L1S 895 03/24/2012 19:15 PDT BD 16.92

— 0.028 0.452 0.011

X

CCT1 #2 15N/03E-25L2S 750 03/25/2012 16:15 PDT BD 27.44

— 0.029 0.586 0.013

X

RDPS #1 15N/06E-33L1S 740 06/10/2009 12:40 PDT 2520

—

—

< 0.020 5.63 d 0.032

X

RDPS #1 15N/06E-33L1S 740 06/10/2009 16:00 PDT 2587

—

—

< 0.020 6.07 d 0.042

X

RDPS #1 15N/06E-33L1S 740 06/11/2009 11:00 PDT 2620

—

—

E 0.010 n 6.43 d 0.059

X

RDPS #1 15N/06E-33L1S 740 06/11/2009 12:45 PDT 2650 12.24

—

E 0.010 n 6.48 d 0.064

X

RDPS #1 15N/06E-33L1S 740 06/11/2009 12:30 PDT BD 12.83 < 0.3

< 0.020 5.48 d 0.019

X

NELT5 #1 16N/01E-35P1S 840 03/06/2012 14:00 PST 3530

—

— 0.034 3.82 0.191

X

NELT5 #1 16N/01E-35P1S 840 03/06/2012 18:00 PST 2620

—

—

< 0.010 3.77

< 0.001

X

NELT5 #1 16N/01E-35P1S 840 03/06/2012 19:30 PST 2710

—

—

< 0.010 3.54

< 0.001

X

NELT5 #1 16N/01E-35P1S 840 03/06/2012 20:30 PST 2800 9.67 < 0.3 0.012 n 3.19

< 0.001

X

NELT5 #1 16N/01E-35P1S 840 03/06/2012 17:30 PST BD 9.24 < 0.3 0.016 n 3.80 0.004

X
Tables 139

Table 22. Summary of water-quality data from monitoring and test wells at the Fort Irwin National Training Center, San Bernardino County, California, 2009–12.—Continued[Wells are listed in order by state well number. The five-digit number in parentheses below the constituent name is the U.S. Geological Survey parameter code used to uniquely identify a specific constituent or property. The information below the parameter code in brackets is the drinking water benchmark level and type. Values in the table which exceed the benchmark level are in bold. Maximum contaminant level (MCL) benchmarks are listed as MCL-US when the MCL-US and MCL-CA are identical, and as MCL-CA when the MCL-CA is lower than the MCL-US or no MCL-US exists. The upper secondary MCL was used for specific-conductance, chloride, sulfate and total dissolved solids. Abbreviations: b, value extrapolated at low end; BD, bulk discharge; d, sample was diluted before analysis; E, estimated or having a higher degree of uncertainty; fbls, feet below land surface; HAL-US, U.S. Environmental Protection Agency (USEPA) lifetime health advisory level; MCL-CA, California Department of Public Health (CDPH) MCL; MCL-US, USEPA MCL; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mm/dd/yyyy hh:mm, month/day/year hour:minute; n, result was below the laboratory reporting level but above the long-term method detection limit; na, not available; NL-CA, CDPH notification level; NWIS, U.S. Geological Survey National Water Information System; pCi/L, picocurie per liter; PDT, Pacific daylight time; PST, Pacific standard time; SMCL-CA, CDPH secondary MCL; SMCL-US, USEPA secondary MCL; TDS, total dissolved solids; °C, degrees Celsius; —, not analyzed; #, number; <, less than; >, greater than; +, plus; μg/L, microgram per liter; μS/cm, microSiemen per centimeter; δ, delta; *, analytical values may be unrepresentively high due to a filter break during sampling; **, value is calculated using linear regression based on the other measured values for the same analysis from this sample set] 

Common 

name

State

well number

Well 

depth 

(fbls 

datum)

Date and time

(mm/dd/yyyy 

hh:mm)

Time 

datum

Sampling 

depth1

(fbls) 

(00003)

Radioisotopes Nutrients

Carbon-14, 

filtered 

(percent modern) 

(49933) 

[na]

Tritium, 

unfiltered 

(pCi/L) 

(07000) 

[20,000 MCL-CA]

Ammonia, 

filtered 

(mg/L as N) 

(00608) 

[30 HAL-US]

Nitrate + nitrite, 

filtered 

(mg/L as N) 

(00631) 

[10 MCL-US]

Nitrite, 

filtered 

(mg/L as N) 

(00613) 

[1 MCL-US]

NWIS 

water-quality 

link

NELT7 #1 16N/02E-16P1S 800 01/12/2012 17:05 PST BD 2.90 < 0.3 0.036 2.30 0.041 X

NELT7 #2 16N/02E-16P2S 640 01/12/2012 16:40 PST BD 1.27 < 0.3 — — — XNELT7 #3 16N/02E-16P3S 400 01/12/2012 18:35 PST BD 3.77 < 0.3 0.017 n 2.47 0.015 XNELT3 #1 16N/02E-31H1S 740 08/04/2011 11:30 PDT 3300 7.28 < 0.5 < 0.010 7.20 d 0.005 XNELT3 #1 16N/02E-31H1S 740 08/04/2011 03:00 PDT 2355 — — < 0.010 21.2 d 0.001 b,n XNELT3 #1 16N/02E-31H1S 740 08/04/2011 04:30 PDT 2535 7.55 < 0.4 < 0.010 21.2 d 0.003 XNELT3 #1 16N/02E-31H1S 740 08/04/2011 05:30 PDT 2715 2.64 < 0.5 < 0.010 21.3 d 0.003 XNELT3 #1 16N/02E-31H1S 740 08/04/2011 10:30 PDT BD 10.91 < 0.4 < 0.010 21.2 d 0.002 b,n XNELT1 #1 16N/02E-34Q1S 760 11/03/2011 15:30 PDT BD 11.30 — 0.028 3.86 0.010 XNELT1 #2 16N/02E-34Q2S 300 11/03/2011 17:00 PDT BD 14.03 — < 0.010 4.33 < 0.001 XSBTW #1 31S/46E-05B1M 400 03/03/2010 10:00 PST BD — < 0.4 < 0.020 2.48 0.004 XSBMW #1 31S/46E-05B2M 290 03/03/2010 14:10 PST BD 23.39 < 0.3 0.026 3.05 0.240 d XSBMW #2 31S/46E-05B3M 150 03/03/2010 17:30 PST BD 43.94 0.4 E 0.018 n 3.12 0.148 XSBMC #1 31S/46E-05D1M 200 03/03/2010 16:55 PST BD 36.05 0.3 0.044 2.92 0.173 X

1 The depth-dependent samples represent a composite of all flow entering the perforated interval below the sample point if the pump intake of the test well was above the sample point or a composite of all 

flow entering the perforated interval above the sample point if the pump intake was below the sample point.

2 Pump intake was above the sample depth. Water-quality samples collected at each depth are a composite sample and represent water quality from the sampled depth to the bottom of the screened interval, 

under pumping conditions using a small-diameter pump as described by Izbicki (2004).

3 Pump intake was below sample depth. Water-quality samples collected at each depth are a composite sample and represent water quality from the sampled depth to the top of the screened interval, under 

pumping conditions using a small-diameter pump as described by Izbicki (2004).
140 Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells

This page intentionally left blank.
Prepared by the Sacramento Publishing Service Center.

For more information concerning this report, contact:

Director

U.S. Geological Survey

California Water Science Center

6000 J Street, Placer Hall

Sacramento, CA 95819

dc_ca@usgs.gov

or visit our Web site at:

http://ca.water.usgs.gov
Kjos and others—Construction, Water-Level, and Water-Quality Data for Multiple-Well Monitoring Sites and Test Wells, Fort Irwin 

National Training Center, San Bernardino County, California, 2009–12—Data Series 788

ISSN 2327-638X (online)

https://dx.doi.org/10.3133/ds788