Ground-Water Hydrology and Water 

Quality of Irwin Basin at Fort Irwin 

National Training Center, California

By Jill N. Densmore and Clark J. Londquist

U.S. GEOLOGICAL SURVEY 

Water-Resources Investigations Report 97-4092

Prepared in cooperation with the

FORT IRWIN NATIONAL TRAINING CENTER

Sacramento, California 

1997
U.S. DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY 

Gordon P. Eaton, Director

The use of firm, trade, and brand names in this report is for identification purposes 

only and does not constitute endorsement by the U.S. Geological Survey.

For additional information write to:

District Chief

U.S. Geological Survey

Placer Hall, Suite 2012

6000 J Street

Sacramento, CA 95819-6129

Copies of this report can be purchased 

from:

U.S. Geological Survey 

Information Services 

Box 25286 

Federal Center 

Denver, CO 80225
CONTENTS

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

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

Purpose and Scope....................................................................................................................................................... 1

Location and General Features.................................................................................................................................... 3

Previous Studies.......................................................................................................................................................... 3

Acknowledgments....................................................................................._^ 5

Geologic Framework............................................................................................................................................................. 5

Stratigraphy................................................................................................................................................................. 5

Faults ........................................................................................^ 9

Ground-Water Hydrology...................................................................................................................................................... 9

Aquifer System Definition .......................................................................................................................................... 9

Natural Recharge and Discharge................................................................................................................................. 11

Ground-Water Pumpage, Water Use, and Artificial Recharge .................................................................................... 11

Ground-Water Levels and Movement......................................................................................................................... 13

Ground-Water Budget..................................................................................._ 15

Ground-Water Quality........................................................................................................................................................... 15

Areal Variation in Ground-Water Quality.................................................................................................................... 15

Dissolved Solids................................................................................................................................................ 16

Nitrate................................................................................................................................................................ 22

Temporal Variation in Ground-Water Quality............................................................................................................. 25

Source and Age of Ground Water................................................................................................................................ 28

Oxygen-18 and Deuterium Isotopes.................................................................................................................. 28

Tritium and Carbon-14...................................................................................................................................... 30

Summary and Conclusions.................................................................................................................................................... 33

References Cited.................................................................................................................................................................... 35

Appendix A..........................................................................................................................................................^ 36

Lithologic Logs............................................................................................................................................................ 36

Borehole Geophysics................................................................................................................................................... 37

Appendix B Water-Level Data for Selected Wells in Irwin Basin, 1992-96..................................................................... 50

Appendix C Water-Quality Data for Selected Wells, Lysimeters, and a Spring in Irwin Basin, 1992-96......................... 68

FIGURES

1,2. Maps showing:

1. Mojave Desert region and study area................................................................................................................ 2

2. Generalized surficial geology, major faults, and location of selected wells and geologic-section lines........... 4

3. Cross-section showing generalized geology across Irwin Basin............................................................................. 6

4. Map showing location and type of ground-water monitoring sites in Irwin Basin................................................. 10

5, 6. Graphs showing:

5. Pumpage for Irwin, Bicycle, and Langford Basins, 1941-93 ........................................................................... 11

6. Water-level fluctuations in selected wells in Irwin Basin.................................................................................. 13

7-9. Maps showing:

7. Water levels in shallow monitoring and production wells in Irwin Basin, 1994 .............................................. 14

8. Water quality of ground-water samples for selected wells in Irwin Basin........................................................ 17

9. Areal distribution of the average dissolved-solids concentrations in ground water from

shallow water-table wells and production wells in Irwin Basin........................................................................ 18

10. Cross-section showing average dissolved-solids and nitrate concentrations in ground water from

selected wells in Irwin Basin.................................................................................................................................. 19

Contents III
11. Map showing areal distribution of the average nitrate concentrations in ground water from

shallow water-table wells and production wells in Irwin Basin............................................................................. 23

12-15. Graphs showing:

12. Time-series of dissolved-solids concentrations of ground water from selected wells in

Irwin Basin, 1940-95........................................................................................................................................ 26

13. Time-series of nitrate concentrations of ground water from selected wells in Irwin Basin, 1940-95 ............. 27

14. Stable-isotope ratios for samples of ground water, spring water, precipitation, and

municipal wastewater, 1992-95........................................................................................................................ 29

15. Relation between dissolved solids and delta deuterium in ground-water samples from wells in

Irwin Basin........................................................................................................................................................ 31

16. Map showing tritium and carbon-14 data for ground water from selected wells in Irwin Basin........................... 32

17. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site

SP1(13N/3E-4B1,-4B2,-4B3)................................................................................................................ 37

18. Well-construction diagram and stratigraphic column for borehole of monitoring site

NIT3 (13N/3E-4B4, -4B5LYS, -4B5LYS, -4B7LYS, -4B8LYS).......................................................................... 38

19-21. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring sites:

19. WC1 (13N/3E-4C1, -4C2, -4C3)........................................................................,............................................ 38

20. WC2 (13N/3E-4D1, -4D2, -4D3)..................................................................................................................... 39

21. NIT2 (13N/3E-4K2, -4K3, -4K4)..................................................................................................................... 39

22. Well-construction diagram and stratigraphic column for borehole of monitoring site

NIT1 (13N/3E-4Q2, -4Q3LYS, -4Q4LYS, -4Q5LYS, -4Q6LYS)......................................................................... 40

23-31. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring sites:

23. AD1(13N/3E-8B!)......................................._ 40

24. WC3 (13N/3E-10E1, -10E2, -10E3)................................................................................................................. 41

25. NH1 (14N/3E-32B1, -32B2, -32B3)................................................................................................................. 42

26. BASEBALL (14N/3E-32F2,-32F3)................................................................................................................. 43

27. FI1 (14N3E/32K3, -32K4, -32K5, -32K6)....................................................................................................... 44

28. SOC2 (14N/3E-32N1, -32N2, -32N3).............................................................................................................. 45

29. SOC1 (14N/3E-32P2, -32P3, -32P4, -32P5, -32P6)......................................................................................... 46

30. BC1(14N/3E-33A1)..............................................._ 47

31. PICMC (14N/3E-33E2,-33E3).................................._ 47

32,33. Well-construction diagram and stratigraphic column for borehole of monitoring sites:

32. LFMW7(14N/3E-33J2)........................................... 48

33. LFMW6(14N/3E-34M2)............................................_ 48

34. Diagram showing rock-type nomenclature for stratigraphic columns................................................................... 49

TABLES

1. State well number, local name, and well-construction data for wells in Irwin Basin............................................... 128

2. Annual ground-water pumpage for Irwin, Bicycle, and Langford Basins near Fort Irwin National

Training Center, 1941-93.......................................................................................................................................... 131

3. Estimate of wastewater recharge in Irwin Basin on the basis of wastewater inflow, evaporation, and

evapotranspiration, 1941-93..................................................................................................................................... 132

4. Ground-water budget for Irwin Basin, 1993............................................................................................................. 134

5. Minimum, maximum, and average of dissolved-solids and nitrate concentrations in samples collected for

selected ground-water sites, 1993-96....................................................................................................................... 135

6. Water-quality data of wastewater effluent at the wastewater-treatment facility....................................................... 137

7. Water-quality data for core samples from Irwin Basin............................................................................................. 138

8. Tritium, carbon-14, carbon-13, deuterium, and oxygen-18 in ground-water samples in Irwin Basin...................... 139

9-25. Lithologic log for boreholes of the following monitoring sites:

9. SP1(13N/3E-4B1,-4B2,-4B3).................................................................................................................... 143

10. NIT3 (13N/3E-4B4, -4B5LYS, -4B6LYS, -4B7LYS, -4B8LYS)........................................................................ 144

11. WC1(13N/3E-4C1,-4C2,-4C3)......................................................................................................................... 145

12. WC2 (13N/3E-4D1, -4D2, -4D3)........................................................................................................................ 146

13. NIT2 (13N/3E-4K2, -4K3, -4K4)........................................................................................................................ 147

IV Contents
14. NTT1 (13N/3E-4Q2, -4Q3LYS, -4Q4LYS, -4Q5LYS, -4Q6LYS).

15. AD1(13N/3E-8B1)........................................................................

16. WC3 (13N/3E-10E1, -10E2, -10E3)..............................................

17. NH1 (14N/3E-32B1, -32B2, -32B3)..............................................

18. BASEBALL (14N/3E-32F2, -32F3).............................................

19. FI1 (14N/3E-32K3, -32K4, -32K5, -32K6)...................................

20. SOC2 (14N/3E-32N1, -32N2, -32N3)...........................................

21. SOC1 (14N/3E-32P2, -32P3, -32P4, -32P5, -32P6)......................

22. BC1(14N/3E-33A1)......................................................................

23. PICNIC (14N/3E-33E2, -33E3)....................................................

24. LFMW7 (14N/3E-33J2)................................................................

25. LFMW6 (14N/3E-34M2)..............................................................

148

149

150

151

153

154

155

156

157

158

158

159

CONVERSION FACTORS, VERTICAL DATUM, ABBREVIATIONS, AND WELLNUMBERING SYSTEM

Multiply By To obtain

Length

inch (in.) 

foot (ft) 

mile (mi)

25.4 

0.3048 

1.609

millimeter 

meter 

kilometer

Area

acre 

square foot (ft2) 

square mile (mi2)

4,047 

0.09290 

2.590

square meter 

square meter 

square kilometer

Volume

cubic foot (ft3) 

acre-foot (acre-ft)

0.02832 

1,233

cubic meter 

cubic meter

Flow rate

acre-foot per day (acre-ft/d) 

acre-foot per year (acre-ft/yr) 

foot per day (ft/d) 

foot per foot (ft/ft) 

foot per year (ft/yr) 

cubic foot per day (ft3/d) 

gallon per minute (gal/min) 

inch per year (in/yr)

0.01427 

1,233 

0.3048 

1 

0.3048 

0.02832 

0.06308 

25.4

cubic meter per second 

cubic meter per year 

meter per day 

meter per meter 

meter per year 

cubic meter per day 

liter per second 

millimeter per year

Transmissivity

foot squared per day (ft2/d) 0.09290 meter squared per day

Temperature is given in degrees Fahrenheit (°F), which can be converted to degrees 

Celsius (°C) by the following equation:

°C=(°F-32)/1.8.

Sea Level: In this report, "sea level" refers to the National Geodetic Vertical Datum of 

1929 (NGVD of 1929) a geodetic datum derived from a general adjustment of the firstorder level nets of both the United States and Canada, formerly called Sea Level Datum of 

1929.

Contents
ABBREVIATIONS:

g gram

kg kilogram

MAAR Mojave Army Antiaircraft Range

mg/L milligram per liter

mL milliliter

mm millimeter

NTC (Fort Irwin) National Training Center

per mil parts per thousand

PVC polyvinyl chloride

ug/L microgram per liter

uS/cm microsiemen per centimeter

Well-Numbering System

Wells and springs are identified and numbered according to their location in the rectangular system for the 

subdivision of public lands. Identification consists 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, wells are sequentially numbered in the order they are inventoried. 

The final letter refers to the base line and meridian. In California, there are three base lines and meridians: Humboldt (H), Mount Diablo (M), and San Bernardino (S). All wells in the study area are referenced to the San Bernardino base line and meridian (S). The letters (LYS) following the sequence number indicate a lysimeter. Well 

numbers consist of 15 characters and follow the format 013N003E05D001S. In this report, well numbers are 

abbreviated and written 13N/3E-5D1. Wells in the same township and range are referred to only by their section 

designation, 5D1. The following diagram shows how the number for well 13N/3E-5D1 is derived.

SECTION 5

RANGE 

R1E R2E R3E

T13N

6

7

18

19

30

31

5

8^

17

20

29

32

4

^9

16

21

28

33

3

10

15-

22

27

34

2

11

~J4

23

26

35

1

12

13

24^

25

36

" ~ ^

D

E

M

N

13N/3 

C

F

L

P

E-5DB

G

K

Q

' A

H

J

R

VI Contents
Ground-Water Hydrology and Water Quality of Irwin 

Basin at Fort Irwin National Training Center, 

California

By Jill N. Densmore anc/CJ. Londquist 

ABSTRACT

Geohydrologic data were collected from 

Irwin Basin at Fort Irwin National Training Center 

in the Mojave Desert of southern California by the 

U.S. Geological Survey during 1992-96 to determine the quantity and quality of ground water 

available in this basin. In addition to data collected 

from existing wells and test holes, 17 monitoring 

sites were constructed in Irwin Basin to provide 

data on subsurface geology, ground-water levels, 

and ground-water quality. Eleven of these sites 

were multiple-well monitoring sites that were constructed to provide depth-dependent geohydrologic data in the aquifer system. The aquifer 

system of Irwin Basin, defined on the basis of 

hydrologic data collected from wells in Irwin 

Basin, consists of an upper and a lower aquifer. A 

1994 water-table contour map shows that a cone of 

depression beneath Irwin Basin well field has 

developed as a result of ground-water development. Water-quality samples collected from Irwin 

Basin wells to determine potential sources of 

ground-water degradation indicate that water in 

three areas in the basin contains high nitrate and 

dissolved-solids concentrations. The stable isotopes of oxygen and hydrogen indicate that 

present-day precipitation is not a major source of 

recharge in this basin. Tritium and carbon-14 data 

indicate that most of the basin was recharged 

before 1953 and that this water may be more than 

14,000 years old.

INTRODUCTION

The area presently known as Fort Irwin National 

Training Center (NTC) was established as the Mojave 

Army Antiaircraft Range (MAAR) in August 1940 as 

an area for antiaircraft training. MAAR was renamed 

"Camp Irwin" in 1942. Camp Irwin was deactivated in 

1944 and transferred back to the U.S. Department of 

the Interior. In 1951, Camp Irwin was reactivated, and 

in 1961, the land was transferred to the U.S. Army and 

renamed "Fort Irwin". It served as an armory and artillery national training center until 1971. From 1971 to 

1972, Fort Irwin was closed. Fort Irwin was transferred 

to the State of California as a training area for the California Army National Guard during 1972-80, and has 

been supporting the NTC since 1981.

The U.S. Army at Fort Irwin NTC obtains all its 

potable water supply from ground water in the Irwin, 

Bicycle, and Langford Basins (fig. 1). From 1941 to 

1995, most of their ground-water pumpage at Fort 

Irwin had been from Irwin Basin, which resulted in 

about 30 ft of water-level decline in the basin. Future 

water demands at the Army base probably will cause a 

further decline in water levels, and several wells in 

Irwin Basin have been taken out of production because 

of water-quality problems. In 1992, the U.S. Geological Survey entered into an agreement with Fort Irwin 

National Training Center to evaluate the long-term 

availability and quality of ground water.

Purpose and Scope

The objectives of this study were to describe the 

geohydrologic and geochemical framework of the 

ground-water basins that supply water to the base, to 

develop ground-water-flow models to help refine the 

understanding of the geohydrology of the basins, and to

Introduction 1
117°30' 117° 116°30'

35°30'

h-r

20MILES 

I

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-scale 

Digital Elevation Model; simulated sun illumination from northwest at 30 degrees above horizon

20 KILOMETERS

EXPLANATION

BoundaryDrainage basin 

Ground-water basin 

(approximate)

Figure 1. Mojave Desert region and study area.

2 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
evaluate the long-term availability of ground water for 

the base. This study will be completed in four phases: 

Phase 1. Describe the geohydrologic and 

geochemical framework of Irwin Basin, 

Phase 2. Develop and calibrate a ground-waterflow model for Irwin Basin, 

Phase 3. Describe the geohydrologic and 

geochemical framework of Bicycle and 

Langford Basins,

Phase 4. Develop and calibrate ground-waterflow models for Bicycle and Langford Basins. 

The purpose of this report is to describe the 

results of phase 1 of the study. Available geohydrologic 

and geochemical data were compiled and new data 

were collected from existing wells. In addition, 

between 1992 and 1995,17 monitoring sites were 

drilled in which 40 wells and 8 lysimeters were 

installed to describe the area! and vertical geohydrologic and geochemical framework of Irwin Basin. A 

conceptual model of the subsurface geology was developed using lithologic and geophysical data collected 

from available boreholes (data shown in appendix A). 

Additional structural information was obtained from a 

seismic-refraction survey. Water-quality samples were 

collected to evaluate possible sources of ground-water 

quality degradation. Samples also were analyzed for 

the stable isotopes of oxygen and hydrogen to determine the source of ground water and for the radioactive 

isotopes of tritium and carbon-14 to evaluate the relative age of ground water (years since the water entered 

the ground-water system) in Irwin Basin.

Location and General Features

Fort Irwin NTC is about 130 mi northeast of Los 

Angeles in the Mojave Desert region of southern California (fig. 1). The nearest major community is Barstow, which is about 35 mi to the southwest. The base 

covers an area of about 970 mi2 and encompasses several ground-water basins. Irwin Basin is bounded to the 

east by Beacon Hill, to the north-northwest by Northwest Ridge, to the west by Southwest Ridge, and to the 

south by low-lying hills that separate Irwin Basin from 

Langford Basin (fig. 2).

Irwin Basin is typical of desert basins in the 

Mojave Desert in that it has a relatively flat floor surrounded by generally rugged mountains. The basin has 

a surface drainage area of about 30 mi2 and the floor of 

the basin covers about 7 mi2 . No perennial streams are 

in the basin, but several dry washes contain some surface flow during or immediately after large storms. Surface drainage out of the basin, when it occurs, is to the 

southeast through an unnamed wash near Garlic Spring 

into Langford Basin (fig. 2).

The Irwin Basin climate is typical of the Mojave 

Desert low precipitation with hot summers and cool 

winters. There are no official weather records for the 

basin, but records for Goldstone, about 7 mi northwest 

of the basin, indicate that average annual precipitation 

is about 6.5 in., mostly during the winter or from a few 

isolated thunder storms during the summer (National 

Oceanic and Atmospheric Administration, 1994). 

Between 1973 and 1993, the annual precipitation at 

Goldstone ranged from about 11.5 in. in 1983 to about 

2 in. in 1975. Between 1940 and 1993, the average 

annual temperature at Barstow was 64°F, ranging from 

3°F in the winter to 116°F in the summer (Earthlnfo, 

Inc., 1994,1995). In Death Valley, about 80 mi north of 

the basin, the average annual potential evaporation is 

about 148 in. and at Newberry Springs, about 25 mi to 

the south, it is about 76 in. (David Inouye, California 

Department of Water Resources, written commun., 

1996).

Previous Studies

Previous studies by the U.S. Geological Survey 

include a hydrogeologic reconnaissance by Kunkel and 

Riley (1959) that identified unconsolidated waterbearing and consolidated nonwater-bearing deposits 

and established that Irwin, Bicycle, and Langford 

Basins were favorable for development of ground 

water. Yount and others (1994) did detailed geologic 

mapping in Irwin Basin and part of Langford Basin and 

determined the location of several faults on the base.

Several consulting and engineering investigations have been completed for the base (C.F. Hostrup 

and Associates, 1955; James M. Montgomery and 

Associates, 1981; Wilson F. So and Associates, 1989) 

to determine the long-term availability of ground water 

for the Fort Irwin NTC. The Montgomery study in 

1981 concluded that ground water was being mined 

from Irwin and Bicycle Basins. Wilson F. So and Associates (1989) determined that if projected Irwin Basin 

water demands were accurate, water levels would be 

"critically deep" at some time between the years 2011 

and 2020.

Introduction
116°43' R2ER3E 116°39'

Drainage Basin / 

Boundary \ /

Quaternary-f 

Tertiary

Correlation and description of map units 

Unconsolidated depositsEXPLANATION

Geology by J. C. Yount, E.R. Schermer. T.J. Felger. 

D.M. Miller, and K.A. Stephens. 1994 

Aquifer system boundary modified from Wilson F. So 

and Assoc., 1989

Alluviur, Playa A A"

Tertiary

pre-Tertiaryj

Consolidated rocksVolcanic

Igneous and metamorphic

32K1

....... Fault- Dashed where approximately

located; queried where uncertain; 

dotted where concealed

section- Sections 

shown on fig. 3

Well and number-

® Production 

9B1 Q Test 

33N1« Installed by USGS

Potential sources of ground-water degradationV

1 f Sprinkler-pivot 6 4 Golf course

field 

2 r ": Sanitary-landfill

1 facility 7\ Soccer field

31| Wastewater-treat- DO C.QK-,H ««w ment facility * Baseball field

4 / / Old biologjcal- 9 Anny ball field

'' >' evaporation ponds __

r^« r. i j 10 g.:i^ Base housing 5*^% Duck ponds *" * y

Figure 2. Generalized surficial geology, major faults, and location of selected wells and geologic-section lines at Fort Irwin National Training Center, California.

4 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Acknowledgments

The authors thank the following personnel at 

Fort Irwin: Rene Quinones for providing all available 

data from existing wells, Benjamin Rodarte and Robert 

Washington for providing production well data, and the 

personnel at DynCorps for providing invaluable assistance in scheduling aquifer tests. The authors also 

thank U.S. Geological Survey Personnel Steven Crawford for performing and analyzing aquifer tests on 

wells in Irwin Basin, Kathryn Koczot for preparation of 

a Geographic Information System database containing 

all available data, and Robert Anders for bacteriologic 

analysis of soil samples.

GEOLOGIC FRAMEWORK

The geology of Irwin Basin was previously 

described by C.F. Hostrup and Associates (1955), 

Kunkel and Riley (1959), James M. Montgomery and 

Associates (1981), Wilson F. So and Associates (1989), 

and Yount and others (1994). The geologic discussion 

presented in this report summarizes information from 

these reports and updates the geology on the basis of 

data collected during this study.

Stratigraphy

For this report, the geologic units are grouped 

into "consolidated rocks" and "unconsolidated deposits" (fig. 2). The consolidated rocks which make up the 

basement complex in the area include igneous and 

metamorphic rocks of pre-Tertiary age and volcanic 

rocks of late Tertiary to Quaternary age. The igneous 

and metamorphic rocks underlie the ground-water 

basin and crop out in the surrounding hills. They contain water only where jointed and fractured, which is 

generally in the upper few tens of feet of the basement 

complex. Where saturated, this "weathered" zone may 

yield moderate quantities of water to wells and is considered to be the base of the aquifer system in the basin. 

Volcanic rocks are found in the mountains north, northwest, and west of Irwin Basin. These volcanic rocks 

generally are not classified as water-bearing (Kunkel 

and Riley, 1959). Basalt dikes, plugs, and lava flows of 

Tertiary to Quaternary age are found in scattered areas 

north and east of Irwin Basin (Kunkel and Riley, 1959) 

and also are not considered water-bearing.

The basin is filled with as much as 950 ft of 

unconsolidated deposits that consist of older alluvium 

of late Tertiary to Quaternary age and younger alluvium of Quaternary age (fig. 3). The older alluvium is 

composed of sand, gravel, and clay and is derived predominantly from granitic rocks, except in the northern 

part of the basin where volcanic rocks dominate. In the 

southeastern part of the basin, the older alluvium consists almost entirely of low-permeability silt and clay 

lacustrine deposits (fig. 3, B-B')- The older alluvium is 

more indurated and less permeable than the overlying 

younger alluvium. However, where the older alluvium 

consists predominantly of sand and gravel, it yields 

moderate amounts of water to wells.

The younger alluvium, which overlies the older 

alluvium throughout the basin (fig. 3), consists of primarily loose, coarse sand and gravel with small 

amounts of clay. These deposits range in thickness 

from 0 ft near the margins of the valley to more than 

400 ft in the central part of the basin (fig. 3, A-A'). 

These deposits generally lie above the water table; 

however, where saturated (primarily in the central part 

of the basin), they are capable of yielding large quantities of water to wells (as much as 1,000 gal/min).

Wellbore-flow tests were done using the tracerpulse method for selected base-supply wells to determine the relative contribution of water to a well from 

individual aquifer layers. The tracer-pulse method uses 

a tracer injected at a known depth in a pumped well. 

The discharge from the well is monitored at the surface, 

the arrival of the tracer is recorded, and the time-oftravel from the injection point to the surface is calculated. The tracer is then injected at another depth. As 

with the previous injection, discharge is monitored at 

the surface, the arrival of the tracer is recorded, and the 

time-of-travel from the injection point to the surface is 

calculated. The velocity of water in the well between 

the two injection points is the distance between the two 

depths divided by the difference between the time-oftravel from the first injection depth to the surface and 

the time-of-travel from the second injection depth to 

the surface. The injection is repeated at other depths in 

the well to obtain a velocity profile. The velocity profile 

obtained from the tracer-pulse data is equated to a flow 

rate, and the percentage of the flow contributed by individual water-bearing zones is calculated in the same 

manner as from velocity profiles obtained using conventional flowmeters. The results of these tests indicate 

that most of the water pumped from these wells is from 

the younger alluvium.

Geologic Framework 5
SOUTHWEST NORTHEAST

1MILE Vertical scale greatly exaggerated 

Horizontal scale 1.5X

I

1 KILOMETER

Quaternaryj

Quaternary-| 

Tertiary I

pre-Tertiaryj

Qa

QTa

EXPLANATION 

Younger alluvium

Older alluvium

Weathered and fractured 

consolidated rock

Consolidated rock

Contact- Queried where uncertain

Fault- Queried where uncertain; arrows 

indicate direction of apparent movement

Water table (Measured 

during 1994)

Well and numberPerforated interval 

( Perforated interval for wells 

13N/3E-6P1 and 14N/3E-33B1 

is not known)

Bottom of borehole

Figure 3. Generalized geology across Irwin Basin at Fort Irwin National Training Center, California.

6 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwln National Training Center, California
Wastewatertreatment

facility 

(projected)

Vertical scale greatly exaggerated 

Horizontal scale 1.5X

1 KILOMETER

Quaternary |

Quaternary-l 

Tertiary I

pre-Tertiary,

Qa

I\VI

EXPLANATION

Younger alluvium

Older alluvium/lacustrine deposits

Weathered and fractured 

consolidated rock

Consolidated rock

CO

m

LLJ 

CO

. 

CO

T

? Contact- Queried where uncertain

Fault- Queried where uncertain; arrows 

indicate direction of apparent movement

Water table (Measured 

during 1994)

Well and numberPerforated interval 

(Perforated interval for wells 

13N/3E-6P1,5Gl,and 

14N/3E-33R1 is not known)

.- Bottom of borehole

Figure 3. Continued.

Geologic Framework 7
03

a

I

o

O

3 

DO

(Q 

!?I

i?

51

NORTH 

B

SOUTH 

B'

FEET 

2,900-1

Duck y uj ponds v ° (Projected) LU

1,800

1 MILE

Quaternary |

Quaternary-f Tertiary j

pre-Tertiary ^

Qa

1 KILOMETER

Younger alluvium

Older alluvium/ 

lacustrine deposits

Weathered and 

fractured consolidated rock

Consolidated rock

t

EXPLANATION

Contact- Queried where 

uncertain

Fault- Queried where 

uncertain; arrows indicate direction of 

apparent movement

Water table (Measured during 1994)

Vertical scale greatly exaggerated 

Horizontal scale 1.5X

Well and numberPerforated 

interval 

(Perforated interval for well 

13N/3E-10D1 is 

not known)

Bottom of 

borehole

Lysimeter and number

Figure 3. Continued.
Faults

Several faults have been mapped in the bedrock 

hills surrounding the basin (Yount and others, 1994) 

(fig. 2). Most of these faults disappear beneath the 

unconsolidated deposits at the margins of the valley 

floor and their presence in the basin is largely 

unknown. Yount and others (1994) have mapped the 

Garlic Spring Fault as extending out into the unconsolidated deposits and they infer that it may cut through 

the older and younger alluvium in the southeastern part 

of the basin (fig. 3, A-A' and A-A"). Water-quality data 

presented in the "Ground-Water Quality" section of 

this report indicate that this fault is a partial barrier to 

ground-water flow. Seismic-refraction surveys were 

completed for this study to locate the extension of the 

Garlic Spring Fault, north-northwest of the wastewater-treatment facility. These surveys were inconclusive; however, they indicate that the bedrock surface is 

highly variable in this area.

The depth of the buried basement complex 

beneath the basin floor is shown in figure 3. The irregular bedrock surface of the basin seems to be affected 

by faulting. Borehole data indicate that the depth to the 

basement complex is shallow on the northeast side of 

the Garlic Spring Fault and deepens to the southwest 

across the Garlic Spring Fault and a parallel unnamed 

fault mapped by Yount and others (1994) (fig. 3). Several other faults in the area shown in figure 2 have been 

mapped (Yount and others, 1994); however, their influence on the depth of the basin is less evident than that 

of the Garlic Spring Fault.

GROUND-WATER HYDROLOGY

The aquifer system of Irwin Basin was defined 

on the basis of geohydrologic data collected from existing and newly installed wells in the basin (fig. 4). Seventeen monitoring sites containing 40 wells were 

completed during 1992-95 (fig. 4). The lithologic, 

well-construction, and geophysical data for these sites 

are shown in appendix A. Eleven of these sites are multiple-well monitoring sites that were constructed to 

measure ground-water levels and ground-water quality 

and to provide data on aquifer properties in the aquifer 

system. A typical multiple-well monitoring site consists of between two and five 2-in.-diameter poly vinyl 

chloride (PVC) piezometers each screened at different 

depths to allow depth-dependent measurements and

sampling. Table 1 (at back of report) lists the State well 

number, local well name, and well-construction data 

for wells in Irwin Basin.

Aquifer System Definition

The aquifer system in Irwin Basin consists of an 

upper and a lower aquifer. The upper aquifer is contained in the saturated part of the younger alluvium and 

is unconfined. This aquifer reaches a maximum thickness of about 200 ft in the west-central part of the basin 

(fig. 3, A-A'). The lower aquifer includes the older alluvium and the upper part of the basement complex that 

is weathered and fractured and, because of formation 

differences, is confined or partly confined throughout 

most of the basin. This aquifer reaches a maximum 

thickness of 600 ft or more in the central part of the 

basin (fig. 3, A-A').

The areal extent of the aquifer system in Irwin 

Basin changes in response to the quantity of water that 

is pumped from and recharged to the basin. For this 

study, the aquifer system boundary (fig. 2) was approximated using the basin boundary initially drawn by 

Wilson F. So and Associates (1989) and modified on 

the basis of 1994-96 water-level data; thus, the boundary shown approximates the boundary location from 

1994 to 1996.

The average weighted specific yield for sediments in the first 150 ft below the water table in Irwin 

Basin was estimated to be 19 percent (James M. Montgomery and Associates, 1981). This estimate was based 

on sediments described in drillers' and geologists' logs 

using published specific yield values of similar material.

Estimates of the transmissivity of the aquifer 

system range from 500 to 5,000 ft2/d (C.F. Hostrup and 

Associates, 1955; Wilson F. So and Associates, 1989). 

However, because most production wells are perforated 

across several zones in the aquifer system, many of 

these numbers do not define the zones that contribute 

large amounts of water to a well. A wellbore-flow test 

using the tracer-pulse method was done in well 14N/ 

3E-32K1 to measure the relative parts of flow from several depths while the well was being pumped. The test 

results indicate that most of the water enters the well 

above the depth of 350 ft, the approximate contact 

between the upper and lower aquifers (fig. 3, A-A').

Ground-Water Hydrology
116°43'R2E R3E

2 KILOMETERS

* 32F2-3

 

\Jl..

32M1 3210,3 r- v-.^

32P2-6 8 \32Q1 

i::, 3202 \ 33N1

9*3203

»24*rEm?ii^

Boundary of Aquifer System

(Approximate)

Drainage Basin 

Boundary LANGFORD 

35' BASIN

13

Unconsdidated deposits 

Consolidated rocks

?..... Fault- Dashed where 

approximately located; 

queried where uncertain; 

dotted where concealed

BI y site of soil sample

EXPLANATION 

Well and number - 

STPI i o Installed by Montgomery

Watson (Site of soil sample) 

32K1 $ production 

4M1 o Production, capped 

33N1A Production, unused

33R1 ©Test

4B4-8 Installed by USGS

Aquifer system boundary modified from 

Wilson F. So and Assoc., 1989

Potential sources of ground-water degradation1 / Sprinkler-pivot

; .... fie|d

2 T '' Sanitary-landfill

	facility

of}: Wastewater-treat-

,:.. ment facility

4 / / Old biological-

'" ' evaporation ponds

5 '"C'j. Duck ponds

6 J \. Golf course 

'X4

7 Vv Soccer field

8 Q Baseball field

9 £: Army ball field 

10^^ Base housing

Figure 4. Location and type of ground-water monitoring sites in Irwin Basin at Fort Irwin National Training Center, California.

10 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Natural Recharge and Discharge

The sole source of natural recharge in Irwin 

Basin is precipitation in the drainage basin (an area of 

29.8 mi2), which probably occurs only during and 

shortly after high-intensity or long-duration storms. 

The margins of the valley floor probably receive most 

of the recharge because runoff from the surrounding 

mountains infiltrates into the coarser alluvium of the 

foothills and farther out in the valley floor along the 

normally dry washes (fig. 2). C.F. Hostrup and Associates (1955) estimated that recharge in Irwin Basin was 

about 150 acre-ft/yr. This estimate, based on groundwater pumpage from February 1941 to June 1945 and 

water-level recovery from June 1945 to February 1951, 

is a minimum long-period average annual rate. Natural 

recharge from 1993 precipitation is assumed to be similar to this estimate.

Before 1941, prior to development in the basin, 

the ground-water system was assumed to be under 

steady-state conditions; therefore, the natural discharge 

from the basin was equal to the natural recharge to the 

basin. The primary natural ground-water discharge

from the basin was underflow to Langford Basin 

beneath the unnamed wash near Garlic Spring (fig. 2). 

Evapotranspiration was considered to be negligible 

because of the sparse vegetation and because the depth 

to water generally was more than 30 ft below land surface throughout the basin.

Ground-Water Pumpage, Water Use, and 

Artificial Recharge

Before the development of Camp Irwin in 1941, 

there was no known pumping of ground water from the 

basin. In 1941, two wells were drilled to meet supply 

needs at MAAR/Camp Irwin, and by 1966, all water 

used at the base was supplied by eight wells in Irwin 

Basin. In 1967, the base began pumping ground water 

from Bicycle Basin to the northeast, and in 1992, they 

began pumping ground water from Langford Basin to 

the southeast (figs. 1 and 5). Total ground-water withdrawals at the base ranged from about 30 acre-ft in 

1941 to more than 3,000 acre-ft in 1990, with as much 

as 1,927 acre-ft being pumped from Irwin Basin in

3,500

3,000

2,500

ill 

ill LL

C 

O

2.000

LJJ

< 1,500 

O_

1,000

500

Langford 

I Bicycle 

Irwin

Base temporarily \ 

deactivated

Base on 

standby

1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995

Figure 5. Pumpage for Irwin, Bicycle, and Langford Basins at Fort Irwin National Training Center, California, 1941-93.

Ground-Water Hydrology 11
1987 (fig. 5, table 2, at back of report). Table 2 summarizes pumpage from 1941 to 1993 for Irwin, Bicycle, 

and Langford Basins.

Most water that is not consumptively used in the 

Fort Irwin Basin is discharged to a wastewatercollection system and treatment facility. From 1941 to 

1955, wastewater was collected in biological evaporation ponds in the northeastern part of the basin (old biological evaporation ponds, fig. 2), and from 1955 until 

present (1997), wastewater was collected and treated at 

the wastewater-treatment facility in the southeastern 

part of the base (fig. 2). The percolation (seepage) of 

wastewater to the water table, estimated at about 1,100 

acre-ft in 1993 (see table 4, later in this section), probably is the largest source of ground-water recharge in 

Irwin Basin. C.F. Hostrup and Associates (1955) 

reported that in 1954, about 70 percent of the total 

water pumped for all uses on the base eventually went 

to the biological evaporation ponds. However, inspection of 1993 records, (Thomas Borley, DynCorps, written commun., 1995), indicates that about 58 percent of 

the total water pumped for all uses on the base went to 

the wastewater-treatment facility. The percentage of 

pumped water that is discharged to the wastewatertreatment facility is less in recent years because more 

ground water is being used for watering lawns, washing 

vehicles, and supplying water outside Irwin Basin. For 

the purposes of this study, these values are used as the 

maximum (70 percent of pumpage) and minimum (58 

percent of pumpage) water deliveries to the 

wastewater-treatment facility between 1941 and 1993 

(table 3, at back of report).

Untreated wastewater was disposed of in the biological evaporation ponds, an area of about 8 acres, 

during 1941-55 in the northeastern part of the basin 

(fig. 2). Since 1955, wastewater has been treated and 

disposed of in ponds at the wastewater-treatment facility in the southeastern part of the basin (fig. 2). These 

ponds covered about 17 acres from 1955 to the mid1980's and, with the addition of three evaporation 

ponds, about 47 acres thereafter. Some of the treated 

wastewater is diverted from these ponds to irrigate the 

base driving range, golf course, and sprinkler-pivot 

field in the southeastern part of the basin (fig. 2). The 

driving range and golf course (an area of about 58 

acres) were irrigated from 1955 to 1971 and from 1981 

to 1993. In 1986, the sprinkler-pivot field (about 10 

acres) was added in the southeastern part of the basin.

Some of the wastewater that goes to the treatment facility is evaporated, but some percolates to the

water table. Ground-water recharge from the treatment 

facility (table 3) is calculated by subtracting the estimated potential evaporation from the sewage ponds at 

the facility and the estimated potential evapotranspiration of wastewater diverted from the ponds for watering 

grass areas (driving range, golf course, and sprinklerpivot field) from the wastewater entering the treatment 

facility. The potential evaporation from the ponds was 

estimated (table 3) by multiplying the area of the ponds 

by the potential evaporation of 6.6 ft/yr reported for 

ponded water at the California Department of Water 

Resources Cimis Station at Newberry Springs, about 

25 mi south of Fort Irwin (David Inouye, California 

Department of Water Resources, written commun., 

1996). The potential evapotranspiration from the grass 

areas was estimated (table 3) by multiplying the grass 

area by the potential consumptive use of 6.3 ft/yr 

reported for alfalfa and grass crops in southwestern 

Arizona (Sandra Owen-Joyce, U. S. Geological Survey, oral commun., 1996).

Estimates of ground-water recharge from wastewater from 1941 to 1993 ranged from 0 to 1,486 acreft/yr and averaged about 320 acre-ft/yr for the minimum estimated wastewater recharge and about 450 

acre-ft/yr for the maximum estimated wastewater 

recharge (table 3). During 1942-45,1951-55,1957, 

and 1960-93, wastewater was assumed to be recharging the basin. During 1969-70, 1972-80,1983,1985, 

and 1991-93, however, estimated ground-water 

recharge from wastewater approached or exceeded 

pumpage in Irwin Basin (table 3).

The infiltration of water used to irrigate lawns 

and playing fields that is not consumptively used by the 

plants is another source of recharge not present before 

the development of the base. During the mid-1960's to 

early 1980's, the area of lawn watering at the base was 

about 14 acres and included lawns at the base housing 

and an Army ball field. The housing area grew in 1983, 

increasing the irrigated area to about 25 acres. During 

1984-85, an additional 8 acres of irrigated area (soccer 

field and a baseball field complex) was added adjacent 

to the base housing in the western part of the basin (fig. 

2). Thus, the total irrigated area was 33 acres by the 

mid-1980's. Assuming that the consumptive use for 

grass in Irwin Basin is about 6.3 ft/yr (Sandra OwenJoyce, U.S. Geological Survey, oral commun., 1996), 

about 90 acre-ft/yr of irrigation water was needed to 

maintain the lawns during the 1960's to the early 

1980's, and about 210 acre-ft/yr (33 acres x 6.3 ft/yr) 

was needed from the early-1980's to present (1997).

12 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Because the irrigation efficiency (consumptive use 

divided by the quantity of applied water) is undoubtedly less than 100 percent, there is the potential for irrigation return water (applied irrigation water in excess 

of the consumptive use) to recharge the ground-water 

system. If one assumes that the irrigation efficiency of 

the lawn areas averages 50 percent (twice as much 

water is applied than is consumptively used), then 

irrigation-return flows would be about 90 acre-ft/yr 

before the early 1980's and 210 acre-ft/yr from the 

early 1980's to present (1997).

Ground-Water Levels and Movement

Before development of Irwin Basin, the groundwater gradient in the basin was relatively flat with a 

slight gradient toward the unnamed wash near Garlic 

Springs. The average water-table altitude was about 

2,305 ft above sea level at the time the first six wells 

were drilled in Irwin Basin (Kunkel and Riley, 1959). 

Ground-water discharge from the basin was underflow 

to Langford Basin beneath the unnamed wash near 

Garlic Spring (James M. Montgomery and Associates, 

1981). A water-level altitude of 2,236.73 ft above sea 

level from a well drilled in the wash near Garlic Spring 

in 1980 and water-level altitudes of 2,110 to 2,113 ft 

above sea level in January 1981 from wells in Langford 

Basin indicate a gradient toward Langford Basin.

During 1992-96, water-level measurements 

were made at 67 wells in Irwin Basin (appendix B). 

Figure 4 shows the locations of the monitored wells 

and table 1 summarizes the construction specifications 

of the wells.

The highest fluctuations of water levels were in 

response to ground-water withdrawals and wastewater 

disposal. Figure 6 shows water-level fluctuations near 

the pumping depression from two wells that are perforated opposite the upper and lower aquifers. These 

hydrographs indicate that, since pumping began in 

1941, water levels have declined slightly more than 30 

ft (well 1-1,13N/3E-5D1, fig. 6) in the central part of 

the basin and that most of this declined (26 ft) between 

1953 and 1967. From 1967 to 1982, water levels in this 

well recovered about 16 ft as a result of the importation 

of water from Bicycle Basin and the decline in activity 

at the base. From the early 1980's until the early 

1990's, pumpage from Irwin Basin increased (maximum of 1,927 acre-ft in 1987), and water levels in well 

1-1 declined about 15 ft to the levels measured in the 

late 1960's. Since 1993, water levels have been recov2,320

c/j

LU 2,300

O 

m

LU 

u_

- 2,280

uJ

Q

r>

2,260

/&-13N/3E-5D1, Well 1-1

(perforations 235-500 feet)

^14N/3E-32H1, Well I-7

(perforations 220-475 feet)

1940 1950 1960 1970 1980 1990 1996

YEAR

Figure 6. Water-level fluctuations in selected wells in Irwin 

Basin at Fort Irwin National Training Center, California.

ering or stabilizing in Irwin Basin, probably in 

response to decreases in ground-water withdrawals in 

the basin (pumpage increased in Bicycle and Langford 

Basins, see fig. 5) and the percolation of wastewater in 

the southeastern part of the basin that has resulted from 

the importation of water from Bicycle and Langford 

Basins. At the time this report was being written, 

pumpage data for 1995-96 were not available, but 

declining water levels during 1995-96 indicate that 

pumpage must be exceeding recharge. Water-level 

measurements from a well northeast of Irwin Basin 

well field (well 1-7,14N/3E-32H1, fig. 6) indicate a 

similar trend in water levels from 1963 to 1996.

Before ground-water development in Irwin 

Basin in 1941, the direction of ground-water flow probably was from the margins of the alluvium near the 

mountain fronts toward the unnamed wash near Garlic 

Spring, through which ground water discharges to 

Langford Basin. The 1994 water-table contour map, 

created from measurements of the shallowest well at a 

multiple-well monitoring site and of the production 

wells, which are generally perforated over both aquifers, is shown in figure 7. Arrows at right angles to the 

contours indicate the general direction of ground-water 

movement. By 1994, pumping in the basin had created 

a water-table depression in the central part of the basin 

beneath the well field. The 1994 water-table contours 

indicate that the direction of ground-water movement 

throughout most of the basin was from the margins of 

the basin toward the pumping depression (fig. 7). Furthermore, a ground-water mound and ground-water 

divide has formed as a result of wastewater disposal in 

the southeastern part of the basin, resulting in an

Ground-Water Hydrology 13
116°43'R2E R3E 116°39'

2 KILOMETERS

BICYCLE 

BASIN

Boundary of Aquifer System 

(Approximate)

Unconsolidated deposits 

Consolidated rocks

 _?..... Fault-Dashed where 

approximately located; 

queried where uncertain; 

dotted where concealed

 4 Direction of ground-water 

movement

 7 2,270 Line of equal water levelDashed where approximately located; queried 

where uncertain. Interval 

10 feet

32K1 

2,266,.

EXPLANATION

Section- Along which the crosssectional area was determined 

for underflow calculation in text 

Well and number- Bottom 

number is altitude of water table, 

measured in 1994, in feet above 

sea level 

Production 

Production, capped 

Production, unused 

Test

Test, destroyed 

Installed by USGS

2310

Aquifer system boundary modified from 

Wilson F. So and Assoc., 1989

Spring and water-surface elevation- In

feet above sea level

Potential sources of degradation- 1 f

2\ ':

«fl:

4 ?

Sprinkler-pivot 

field

Sanitary-landfill

facility

Wastewater-treatment facility

Old biologicalevaporation ponds 

Duck ponds

c / 

0 V !. Golf course

V-.

7 \> Soccer field

8 n Baseball field

9 fl: Army ball field

10 Base housing

Figure 7. Water levels in shallow monitoring and production wells in Irwin Basin at Fort Irwin National Training Center, 

California, 1994.

14 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
increase in water levels in this area (fig. 7). The groundwater levels possibly are higher than those present 

before the development of ground water in Irwin Basin. 

Water from this mound flows northwestward toward 

the ground-water depression in the central part of the 

basin and southeastward toward the wash near Garlic 

Spring.

The 1994 water-table contours indicate that 

ground water continues to discharge from Irwin Basin 

to Langford Basin. The quantity of ground-water discharge to Langford Basin was estimated with the following form of Darcy's law:

Q = KIA (1)

where

Q is ground-water underflow, in cubic feet per

day;

K is hydraulic conductivity, in this case about 

25 ft/d at well 13N/3E-10E3, (Steven Crawford, U.S. Geological Survey, written commun., 1996);

/ is hydraulic gradient estimated from the 

water-level altitude at well 13N/3E-10E3 and 

the altitude (2,237 ft above sea level in 1980) 

at well LIX near Garlic Spring, in this case 

0.01 ft/ft (fig. 7); and

A is cross-sectional area of the aquifer (fig. 7) 

perpendicular to flow, in this case 40,000 ft2 

[Computed by multiplying the saturated 

thickness of the younger alluvium (50 ft at 

well 13N/3E-10E3; fig. 3) by the aquifer 

width of 800 ft (fig. 2) in the area of discharge. Flow in the fine-grained older 

alluvium and the fractured bedrock was considered negligible.]

Ground-water discharge from Irwin Basin to 

Langford Basin calculated from the above equation is 

10,000 ft3/d (85 acre-ft/yr) or more. Under 1994 conditions, discharge of ground water from Irwin Basin to 

Langford Basin through the unnamed wash near Garlic 

Spring results from mounding of water beneath the 

duck ponds.

Water-level data from multiple-well monitoring 

sites indicate that the hydraulic head (or water level) 

varies with depth (appendix B). In general, the hydraulic head is higher in wells perforated in the upper aquifer than those perforated in the lower aquifer. This head 

distribution indicates downward vertical flow. The difference in hydraulic head between the upper and lower

aquifer ranges from 0.1 to 4.5 ft. The largest differences 

in hydraulic head are at monitoring site 13N/3E-10E1- 

3 in the southeastern part of the basin and at monitoring 

sites 14N/3E-32N1-3 and -32P2-6 in the west-central 

part of the basin (fig. 4, appendix B). This difference in 

hydraulic head probably results from wastewater disposal and irrigation return, respectively, near these 

sites.

Ground-Water Budget

The ground-water budget for Irwin Basin indicates that total recharge (1,460 acre-ft/yr) to the basin 

exceeded total discharge (1,085 acre-ft/yr) from the 

basin in 1993 (table 4, at back of report). The difference 

between recharge and discharge indicates a change in 

storage. A positive number indicates water is recharging the system and that water levels will rise; a negative 

number indicates that water is discharging from the 

system and that water levels will decline. Assuming 

that pumpage in Irwin Basin continues to decline and 

wastewater disposal practices continue to increase, 

water levels will continue to rise. The declining water 

levels in 1996 (fig. 6) indicate that discharge (pumpage) exceeded recharge (wastewater disposal) during 

this year.

GROUND-WATER QUALITY

Water-quality samples were collected from 68 

wells and 7 suction lysimeters in Irwin Basin between 

January 1992 and September 1996 (fig. 4). Of the wells 

sampled, 12 were multiple-well monitoring sites, 

which allow depth-dependent sampling. The suction 

lysimeters consist of a porous ceramic cup that is 

attached to a PVC pipe connected to land surface by 

two access tubes. The suction lysimeters were used to 

collect porewater samples from the unsaturated zone 

by applying a vacuum to one of the access tubes. Samples from the wells and suction lysimeters were analyzed in the field for temperature, pH, alkalinity, and 

specific conductance and in the lab for major ions, trace 

elements, and selected isotopes (appendix C).

ArealI Variation in Ground-Water Quality

The quality of ground water in Irwin Basin varies 

areally in the water-bearing deposits. Representative

Ground-Water Quality 15
chemical analyses of ground water throughout the area 

are shown in figure 8 using a method suggested by Stiff 

(1951). The water-quality diagrams show the general 

quality and areal differences in chemical character of 

the water. Analyses with similarly shaped diagrams 

represent ground water with similar chemical characteristics for major ions. Changes in the width of the diagrams are approximate indications of the differences in 

the concentrations of dissolved constituents.

Sodium is the predominant cation in ground 

water throughout most of Irwin Basin, and chloride, 

sulfate, and bicarbonate are the primary anions (fig. 8). 

However, the primary cations in the samples from wells 

in the southeastern part of the basin are calcium and 

sodium. Samples from wells in the southeastern part of 

the basin also have greater dissolved-solids concentrations, as indicated by the larger Stiff diagrams (fig. 8). 

The difference in chemical character and dissolvedsolids concentrations indicate that the southeastern part 

of the basin contains different geologic materials 

and(or) is being recharged by a different source of 

water possibly the evaporated and treated wastewater. Dissolved-solids and nitrate concentrations are 

used in this report to further describe the areal variation 

in water quality in Irwin Basin.

Dissolved Solids

The dissolved-solids concentrations of ground 

water in Irwin Basin range from 433 to 6,380 mg/L and 

exceed 500 mg/L the level recommended as a secondary drinking-water standard by the U.S. Environmental Protection Agency (1991) in 64 of 74 wells 

sampled in the basin (table 5, at back of report). The 

areal distribution of the average dissolved-solids concentrations is shown on figure 9; the vertical distributions of the dissolved-solids concentrations are 

presented along a southwest-northeast, west-east, and a 

north-south section on figure 10. In general, dissolvedsolids concentrations are higher in the upper aquifer 

than in the lower aquifer because the upper aquifer is 

more easily contaminated from surface infiltration.

The highest dissolved-solids concentrations 

(greater than 2,000 mg/L) are present in the southeastern part of Irwin Basin near the wastewater-treatment 

facility, the golf course, and the sprinkler-pivot field 

(figs. 9 and 10). Wastewater that is discharged to the 

evaporation ponds at the wastewater-treatment facility 

and that is used for irrigation in the area is a potential 

source of ground-water recharge. Dissolved-solids 

concentrations in porewater samples from the suction

lysimeters in the unsaturated zone (13N/3E-4Q3LYS, 

-4Q4LYS, -4Q5LYS, and -4Q6LYS) beneath the 

sprinkler-pivot field range from 2,140 mg/L in lysimeter 13N/3E-4Q6LYS at 15 ft below land surface to 

6,380 mg/L in lysimeter 13N/3E-4Q3LYS at 75 ft 

below land surface (fig. 10). The dissolved-solids concentrations of the porewater were much higher than the 

dissolved-solids concentrations of the wastewater 

effluent. The dissolved-solids concentration of a grab 

sample of the wastewater effluent was 826 mg/L (table 

6, at back of report), which is much less than the measured dissolved-solids concentrations in the porewater 

samples from the lysimeters beneath the sprinklerpivot field. Therefore, wastewater alone cannot be the 

source of the high dissolved-solids concentrations.

The fact that the dissolved-solids concentrations 

of the porewater increase with depth in the unsaturated 

zone beneath the sprinkler-pivot field (fig. 10) indicates 

that the wastewater effluent leaches salts from the 

unsaturated zone as it moves downward to the water 

table. Selected core samples were collected during 

drilling at sites GB1, STP3R, STP7, STP8, STP9, and 

STP11 in the southeastern part of the basin (fig. 4). 

Core extracts for estimating the salt content of the 

unsaturated zone were prepared by adding 50 mL of 

deionized water to about 50 g wet weight of core material. Extracts from core samples collected at STP8 at 40 

ft, STP9 at 15 ft, and STP11 at 15 ft and 25 ft had high 

specific-conductance concentrations (greater than 

1,000 ^iS/cm, table 7, at back of report). Specific conductance can be used as an approximate measurement 

of dissolved-solids concentrations of the core extract. 

The core extract data indicate that the sediment in the 

area of the golf course and duck ponds contains minerals that dissolve readily if water is added. This area is 

at the lowest land-surface altitude of the basin, and surface runoff has collected in this part of the basin at least 

throughout the Holocene period. Evaporite deposits, 

such as halite, gypsum, and calcite, formed in the sediments as surface water were evaporated and transpired. 

Before the wastewater recharge, there was scant natural 

recharge in the area to flush the salts from the sediments. The high dissolved-solids concentrations in 

water from wells in this part of the basin are the result 

of dissolution of these evaporite deposits when wastewater effluent percolates through these sediments.

Ground water with high dissolved-solids concentrations is migrating northwestward toward the 

pumping depression in the center of the basin. Westward, horizontal migration of the high dissolved-solids

16 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
116°43'R2E R3E 116°39'

2 KILOMETERS

BICYCLE 

BASIN

EXPLANATION

1 Unconsolidated deposits Water-quality diagram (from Stiff 1951)-

 Difference in configuration reflects differences

. _?..... Fault- Dashed where in chemical character. The area of the diagram

approximately located; is an approximate indication of dissdved-solids

queried where uncertain; concentration. The largerthe area of the diagram,

dotted where concealed the greater the dissolved-solids concentration

Well and number-Bottom 

32M1 number is depth of well, 

560 in feet below land surface

9B1 Production 

120® Test

« Installed by USGS

Cations

Sodium and Potassium 

Magnesium

Anions

Chloride and Fluonde 

_ Sulfate 

Calcium m Bicarbonate and Carbonate

' Chl 

urrT^I Sulf 

:ium m Bicar i i ! i i I i i i i

8.0 0 8.0 

Miltequivalents per liter

Aquifer system boundary modified from 

Wilson F. So and Assoc., 1989

Potential sources of ground-water degradationI/

,« - 

2\ :

3^ «J -* 

4/7

5<i

Sprinkler-pivot 

field

Sanitary-landfill

facility 

Wastewater-treatment facility

Old biologicalevaporation ponds 

Duck ponds

6.f' ' "":

8r

91

10 «

 M

Golf course

Soccer field

Baseball field

Army ball field

Base housing

Figure 8. Water quality of ground-water samples for selected wells in Irwin Basin at Fort Irwin National Training Center, 

California.

Ground-Water Quality 17
116°43'R2NR3N

2 KILOMETERS

BICYCLE 

BASIN

H

Aquifer system boundary modified from 

EXPLANATION Wilson F. So and Assoc, 1989

Unconsolidated deposits A__A' Line of section (sections 794 _ . _ t ... , . ... . .,,. Consolidated rocks shown in f'9ure 1°) f Spnng" T°tal dlssolved sollds- m mill'9rams Per llter

Well and number-Bottom Potential sources of ground-water degradation-

>2,000 I

-? Fault- Dashed where number is dissolved-solids

approximately located; concentrations, in milligrams

queried where uncertain; per |jter

dotted where concealed 392K6 @ Production

Dissolved-solids o Production, capped

concentrations- A Production, unused

In milligrams per liter I yest

	 Installed by USGS

1 / Sprinkler-pivot 0 _

, fje|(j |l Golf course

2r~": Sanitary-landfill 7 7^

' ' facility \> Soccer field

3|J Wastewater-treat- g : . R . .... .. ment facility 5-! oaseoan iieia

4 / / Old biological- 9 {'.': Army ball field

!--; evaporation ponds r*^

S*\ Duck ponds 10 S5!H Base housing

Figure 9. Areal distribution of the average dissolved-solids concentrations in ground water from shallow water-table wells and 

production wells in Irwin Basin at Fort Irwin National Training Center, California.

18 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
SOUTHWEST 

A

NORTHEAST 

A'

1,500

1 MILE

J

Vertical scale greatly exaggerated 

Horizontal scale 1.5X

1 

1 KILOMETER

Quaternary

QuaternaryTertiary

pre-Tertiary

Qa

QTa

I

Younger alluvium 

Older alluvium

Weathered and fractured 

consolidated rock

Consolidated rock

Contact- Queried where 

uncertain

Fault- Queried where uncertain; 

arrows indicate direction of 

apparent movement

EXPLANATION

<700

700-1,000

ed T

c\ 

u. 

<r

V

Dissolved-solids concentrationsIn milligrams per liter 

(ND indicates no data)

Water table (Measured in 1994)

Well and number-

, Perforated interval 

Perforated interval for wells 

13N/3E-6P1 and 14N/3E-33B1 

is not known)

Dissolved-solid 

concentration, in 

milligrams per liter

03/5 a-- Nitrate as nitrogen 

concentration, in 

milligrams per liter

Bottom of borehole

Figure 10. Average dissolved-solids and nitrate concentrations in ground water from selected wells in Irwin Basin at Fort Irwin 

National Training Center, California. (Location of sections is shown on figure 9).

Ground-Water Quality 19
Wastewatertreatment

facility

- (Projected)

1,800

1 MILE Vertical scale greatly exaggerated 

Horizontal scale 1.5X

1 

1 KILOMETER

EXPLANATION

Quaternary

QuaternaryTertiary

pre-Tertiary 

Qa

%

_r^>

iSYounger alluvium

Older alluvium/lacustrine 

deposits

Weathered and fractured 

consolidated rocks

Consolidated rocks

- ? Contact- Queried where 

uncertain

Fault- Queried where uncertain; 

arrows indicate direction of 

apparent movement

. - Water table (Measured in 1994)

<700 

700-1,000

1.000-2,000

Dissotved-solids concentrationsIn milligrams per liter 

(ND indicates no data)

Well and numberPerforated interval 

( Perforated interval for wells 

13N/3E-6P1,5G1,and 

14N/3E-33R1 is not known)

Dissolved-solids 

concentration, in 

milligrams per liter

Nitrate as nitrogen 

concentration, in 

milligrams per liter

-Bottom of borehole

Figure 10. Continued.

20 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
».sl 1=1 1

"0 - ._ o r-- ^ & 

-.= C CD t- c CD ±-

O O Q. -±± O Q. O

51 | »«! ?

>^« Sl« E

SH^IIt s

.« O'c -t

Q o t 2

\^

\CVJ

x**\ ln

± O'c 0

» 0 t CQ \ \ °> \

CVJ \

<D

.a

 o

CO

 o 

o

O)

il

Ground-Water Quality 21
content water is retarded at depth by the Garlic Spring 

Fault, which acts as a partial barrier to ground-water 

flow near the wastewater-treatment facility. Water from 

wells east of Garlic Spring Fault (13N/3E-4B1-3), perforated in the lower aquifer, contains moderate to high 

dissolved-solids concentrations (863-1,523 mg/L), 

whereas water from wells west of the fault (13N/3E4C1-3) contains moderate dissolved-solids concentrations (869 mg/L) in the shallowest zone (the upper 

aquifer) and low dissolved-solids concentrations (503- 

557 mg/L) in the deeper zone (the lower aquifer) (fig. 

10, section A-A")- The higher dissolved-solids concentrations of water in the upper aquifer, and the contrasting lower concentrations in ground water at depth 

west of Garlic Spring Fault indicate that there is horizontal movement across the fault in the upper aquifer 

but minimal horizontal movement at depth. Where the 

fine-grained deposits are in the older alluvium in the 

southeastern part of the basin, they seem to retard the 

vertical movement of the high dissolved-solids content 

ground water from the upper to the lower aquifer (fig. 

10, section B-B').

Another area of the basin with relatively high 

dissolved-solids concentrations (in excess of 700 mg/ 

L) is in the west-central part of the basin (figs. 9 and 

10). Data from the multiple-well monitoring sites 

(14N/3E-32N1-3, -32P2-6, and -32K3-6) (fig. 10, section A-A") indicate that the highest dissolved-solids 

concentrations are near the water table in the upper 

aquifer. Irrigation-return flow from the base housing 

area and(or) leaking sewer pipes are probable sources 

of the high dissolved-solids concentrations.

Nitrate

Wastewater influent (water entering the wastewater-treatment facility) contains high concentrations 

(in excess of 40 mg/L as N) of nitrogen in the form of 

ammonia and organic nitrogen (table 6). As the wastewater moves through the treatment facility and into the 

evaporation ponds (effluent) and is used for irrigation, 

the concentration and chemical form (species) of the 

nitrogen in the wastewater change. The nitrogen species are interrelated by a complicated series of reactions that collectively constitute the nitrogen cycle 

(National Research Council, 1978). Nitrogen in the 

wastewater influent and effluent is predominantly in the 

form of ammonia and organic nitrogen (table 6). 

Organic nitrogen in wastewater can be converted to 

ammonia, which along with ammonia already in the 

wastewater, can be oxidized to nitrate. The organic

nitrogen can be converted to ammonia by aerobic bacteria, which exist with oxygen, and anaerobic bacteria, 

which exist without oxygen. The conversion of ammonia to nitrate is a two-step process accomplished by 

aerobic bacteria. The first step involves the oxidation of 

ammonia to nitrite and the second step involves the oxidation of nitrite to nitrate. Nitrite commonly does not 

accumulate because it is oxidized as rapidly as it is 

formed.

Comparison of samples of the wastewater influent and effluent (table 6) indicate a total nitrogen reduction of 16 mg/L as N. Nitrogen can be removed from 

wastewater by sorption and ion exchange, ammonia 

volatilization, incorporation into cell biomass, plantroot uptake, and denitrification. Denitrification is the 

biochemical reduction of nitrate and nitrite to gaseous 

nitrogen by anaerobic bacteria. Although the nitrogen 

in wastewater is predominantly in the form of ammonia 

and organic nitrogen, nitrate is the predominant nitrogen form in the underlying ground water (appendix C). 

The ammonia and organic nitrogen are most likely oxidized to nitrate in the unsaturated part of the alluvium 

beneath the evaporation ponds and the irrigated fields 

and golf course.

Nitrate concentrations obtained from water samples collected from wells during the study are given in 

table 5 as nitrite plus nitrate as nitrogen (NO2+NO3-N) 

and, in some instances, as nitrate as nitrogen (NO3-N). 

Because nitrite concentrations generally are negligible, 

the NO2+NO3-N and NO3-N analyses are equivalent 

and referred to in this report as nitrate-N. Nitrate-N 

concentrations in ground water in Irwin Basin range 

from <0.05 to 34 mg/L (table 5). In general, nitrate concentrations decrease with depth beneath the water table 

(fig. 10). Nitrate-N concentrations in native ground 

water, as sampled by wells in areas with no evident 

sources of contamination (wells 14N/3E- 32B1-3 and 

13N/3E-8B1), are generally less than 3 mg/L (table 5). 

This concentration is comparable to background levels 

of nitrate-N (2-3 mg/L) commonly from desert environments (Umari and others, 1993). High nitrate-N 

concentrations (greater than 5 mg/L) in ground water 

are in three areas of Irwin Basin: (1) in the southeastern part of the basin near the wastewater-treatment 

facility, (2) in the northeastern part of the basin near the 

sanitary-landfill facility, and (3) in the west-central part 

of the basin (fig. 11).

Nitrate-N concentrations in excess of 10 mg/L, 

the maximum contaminant level of nitrate as nitrogen 

(U.S. Environmental Protection Agency, 1994), are in

22 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
116°43'R2ER3E 116°39'

Unconsolidated deposits 

Consolidated rocks

 _?..... Fault-Dashed where 

approximately located; 

queried where uncertain; 

dotted where concealed

A A" Line of geologic section

Nitrate as nitrogen concentration- In milligrams 

per liter. Queried where 

uncertain

Aquifer system boundary modified from EXPLANATION Wilson R So and Assoc" 1989 

Well and number- Bottom Potential sources of ground-water degradation-

	number is concentration, 

32K1 in milligrams per liter 

5-10® Production

O Production, capped

<J> Production, unused

<U Test

 Installed by USGS

Spring- Nitrate concentration, in milligrams per liter

I/'

1 2 r3 II

4/ .

5^

Sprinkler-pivot 

field

\ Sanitary-landfill 

facility

Wastewater-treatment facility

' Old biologicalevaporation ponds

k Duck ponds

6|L Golf course

'\ Soccer field

8 » Baseball field

9 Army ball field

 JQ ,.: ,,,a.^

WjK Base housing

Figure 11. Areal distribution of the average nitrate concentrations in ground water from shallow water-table wells and production 

wells in Irwin Basin at Fort Irwin National Training Center, California.

Ground-Water Quality 23
water from wells adjacent to the wastewater-treatment 

facility (13N/3E-4B4, -4G1, and -4K1) and from 

lysimeters and a well (13N/3E-4Q5LYS, -4Q6LYS and 

-4Q2) beneath the sprinkler-pivot field (figs. 10 and 

11). The high nitrate concentrations beneath and near 

the wastewater-treatment facility are consistent with 

wastewater effluent recharging the ground-water system. The plume of high nitrate (water with nitrate concentrations in excess of 10 mg/L) extends about 0.5 mi 

northwest of the wastewater-treatment facility and at 

least 0.25 mi southeast of the duck ponds (fig. 11). East 

of the Garlic Spring Fault, the younger alluvium is 

unsaturated beneath the wastewater-treatment facility. 

Therefore, the wastewater can directly recharge the 

older alluvium of the lower aquifer, as evidenced by 

high nitrate concentrations in the older alluvium and 

weathered basement complex (fig. 10, A-A"). West of 

the Garlic Spring Fault, where part of the younger alluvium is saturated, high nitrate concentrations are in the 

upper aquifer and not in the lower aquifer (fig. 10, AA"). The silt and clay deposits of the older alluvium in 

this part of the basin probably retard the downward 

migration of the high nitrate ground water.

No horizontal barriers are known to exist 

between the high nitrate plume on the west of the Garlic Spring Fault and the base production wells (fig. 11). 

Consequently, if the water-level gradients were to 

remain the same as 1994 (fig. 7), the high nitrate plume 

west of the Garlic Spring Fault could move toward the 

center of the basin and contaminate the base production 

wells. The time required for the plume to move from its 

position during 1993-96 to the nearest production well 

(14N/3E-32Q1) can be estimated by using the following form of Darcy's law:

(2)

where

l) is average velocity of ground-water movement in feet per day;

K is hydraulic conductivity of the younger alluvium of the upper aquifer, in this case, 25 ft/d 

(Steven Crawford, U.S. Geological Survey, 

written commun., 1996);

/ is hydraulic gradient estimated from waterlevel contours (using water levels at well 

13N/3E-4B3 and well 14N/3E-32K1, fig.7), 

in this case 0.004 ft/ft (fig. 7); and

6 is effective porosity of the upper aquifer, in 

this case 30 percent (estimated from drillers' 

logs).

The average velocity of ground-water movement 

calculated by the above equation is 0.3 ft/d. At this rate 

of ground-water movement, the high nitrate content 

water would move from the wastewater treatment facility to the nearest production well in the center of the 

basin (well 14N/3E-32Q1 in fig. 7), a distance of about 

1 mi, in about 43 years. The time calculated for the 

degraded water to reach the production well should be 

considered only as a gross estimate; the actual movement may take place faster or slower than calculated.

High nitrate concentrations also are near the 

northern end of and beneath the sanitary-landfill facility (fig. 11). Nitrate-N concentrations in water from 

wells beneath or adjacent to the sanitary-landfill facility range from 4.0 to 7.5 mg/L (14N/3E-33A1, -33B1,

-33G1, -33G2, -33G4, -33H1, -33H2, -33H3, -33J1,

-33J2, -34D1, -34M1, and -34M2; fig. 11). Eight wells 

are perforated in fractured consolidated rock and five 

wells are perforated in older alluvium (fig. 11). Five 

wells perforated in fractured consolidated rock and 

three wells perforated in alluvium contain water with 

more than 5 mg/L of nitrate-N (figs. 10 and 11). 

Because the nitrate concentration is higher in water 

north of and beneath the northern part of the sanitarylandfill facility than in water in the southern part, which 

is close to the northern edge of the wastewatertreatment facility, it is unlikely that the high nitrate concentrations result from wastewater recharging the aquifer beneath the wastewater-treatment facility. Nitrogen 

isotopes from soil samples collected in Irwin Basin and 

from ground-water samples from near the sanitarylandfill facility are being analyzed to help determine 

the source of the high nitrate concentrations.

High nitrate and dissolved-solids concentrations 

were in the upper aquifer near the center of Irwin Basin 

(figs. 9 and 11). Water from wells in the vicinity of the 

soccer and Army ball fields contain water with greater 

than 5 mg/L of nitrate-N (14N/3E-32K1, -32M1,

-32N2-3, -32P5-6, and -32Q3; figs. 10 or 11). Wells 

14N/3E-32P5-6 and -32N2-3, the upper two wells at 

multiple-well monitoring sites in this area, are perforated in the upper aquifer (fig. 10). The deeper wells at 

these sites (14N/3E-32P2-4 and -32N1) are perforated 

in the lower aquifer and have considerably lower nitrate 

concentrations. Wells 14N/3E-32P5 and -32N2 (perforated from 385-405 ft and 390-410 ft, respectively) 

provide an approximate lower depth of the high nitrate

24 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
water. Staff at Fort Irwin believed that the high nitrate 

concentrations measured in this area were the result of 

wastewater leakage from cracked seals at the junctions 

of sewer pipes. Other possible sources of high nitrate 

include: (1) fertilizer used on the lawns and playing 

fields in this area of the base and (2) natural nitrate that 

has been leached from the desert soils by the irrigationreturn flows. Because there is scant natural recharge to 

the ground-water system in Irwin Basin, natural nitrate 

can remain immobilized in the desert soils for many 

years. Irrigation water applied to the desert soils 

leaches this nitrate from the soil and carries it down to 

the water table. Water samples are being analyzed for 

nitrogen isotopes to help determine the source of the 

high nitrate concentrations.

Temporal Variation in Ground-Water 

Quality

Time-series graphs of dissolved-solids (fig. 12) 

and nitrate concentrations (fig. 13) were examined for 

11 current and former production wells in Irwin Basin 

to determine if there have been any water-quality 

changes since the base first opened. Analytical results 

of samples from production wells in Irwin Basin provided the longest period of record available. For the 

purposes of this discussion, the production wells were 

divided into two groups: (1) production wells west of 

the unnamed northwest-southeast trending fault that 

bisects the basin and (2) production wells east of the 

unnamed fault.

Production wells west of the unnamed fault 

include wells 13N/3E-5D1, 14N/3E- 32K1, -32M1,- 

32P1,-32Q2, and -32Q3 (fig. 4). Available data collected from these wells indicate that dissolved-solids 

and nitrate concentrations generally have increased 

since the base first opened in 1941 (figs. 12 and 13). 

The earliest available chemical analyses were from 

samples collected in 1943 from wells 13N/3E-32P1 

and -32Q2. Both samples had dissolved-solids concentrations of less than 500 mg/L and nitrate-N concentrations of less than 2 mg/L (figs. 12 and 13). 

Dissolved-solids and nitrate concentrations remained 

relatively stable in these wells until the late 1970's 

when dissolved-solids concentrations increased to 

about 600 mg/L and nitrate-N concentrations increased 

to about 5 mg/L in samples from well 13N/3E-32P1. 

Neither of these wells is currently (1997) operating; 

however, samples from nearby replacement wells 

(13N/3E-32M1 and -32K1) had dissolved-solids concentrations of about 600 mg/L and nitrate-N concentrations in excess of 5 mg/L in 1994. These wells are 

downgradient of irrigated areas, including the base 

housing and the soccer and Army ball fields (fig. 4). 

Irrigation-return flows and mobilized natural nitrate 

from these areas may be the source of the increased 

dissolved-solids and nitrate concentrations.

Two wells nearest to the irrigated areas (13N/3E5D1 and 14N/3E-32Q3) had at least one sample with 

dissolved-solids concentrations of about 900 mg/L and 

nitrate-N concentrations of about 10 mg/L. Dissolvedsolids concentrations in samples from well 13N/3E5D1 increased from about 400 mg/L in 1952 to more 

than 500 mg/L in 1958 (fig. 12). Samples from this well 

in 1974 and 1975 had dissolved-solids concentrations 

of about 900 mg/L; however, a sample collected in 

1976 had a dissolved-solids concentration of about 500 

mg/L. Nitrate-N concentrations in samples from this 

well followed a similar pattern (fig. 13). Dissolvedsolids concentrations in samples from well 14N/3E32Q3 increased from less than 600 mg/L in the 1960's 

and early 1970's to about 900 mg/L in 1995 (fig. 12). 

Nitrate-N concentrations increased from about 4 mg/L 

in 1975 to 8.4 mg/L in 1995 (fig. 13). The high concentrations were analyzed in samples from the wells after 

a long period of scant pumping from the wells. 

Dissolved-solids concentrations may have increased as 

a result of the accumulation of irrigation-return water 

in these areas during the periods of scant pumping. 

When the wells are not pumped regularly, irrigationreturn water accumulates in the ground-water system 

and is a larger part of the water being pumped. When 

wells are purged regularly, irrigation-return water does 

not accumulate because the return water probably is 

pumped out almost as fast as it reaches the water table; 

thus a larger part of pumped water comes from native 

ground water. Poor sanitary seals may be another cause 

for the high concentrations. If the wells had poor sanitary seals, surface contamination, such as irrigationreturn flows and leaking sewer pipes, could directly 

enter the well's gravel pack and contaminate the well. 

During periods of scant pumping, the contamination 

could accumulate in the vicinity of the well. When the 

wells are initially pumped after a period of inactivity, 

the initial water would contain a high percentage of the 

contaminated water and then, with time, this percentage would decrease.

Production wells east of the unnamed fault 

include wells 14N/3E-32F1, -32H1,32J1, -32L1, and 

-32Q1. With the exception of wells 13N/3E-32L1 and

Ground-Water Quality 25
900

800

700

600

500

400

900

800 -

700 -

600 -

500 -

C 400

14N/3E-32M1 and-32P1, 

Production wells I-2A and I-2

-32M1

-32P1

G

14N/3E-32Q3, Production well I-8

900

800

O 

03

§ 700

14N/3E-32F1 and-32L1, 

_ Production wells I-3A and I-3

-32L1

600

^ 500

400

900

800

700

600

500

400

-32F1 -

TTJTI'M 1 I ' I I ' ' 'II' 1 ' qrTTTpn l|ITir|llll|llll|MIIT

14N/3E-32J1, Production well I-6

14N/3E-32K1 and-32Q2, 

Production wells I-5A and I-5

-32Q2 -32K1 ~

14N/3E-32Q1, 

Production well I-4

14N/3E-32H1, Production well I-7

1940 45 50 55 60 65 70 75 80 85 90 1995 1940 45 50 55 60 65 70 75 80 85 90 1995 

YEAR YEAR

Figure 12. Time-series of dissolved-solids concentrations of ground water from selected wells in Irwin Basin at Fort Irwin National Training Center, California, 1940-95.

26 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
15

10

14N/3E-32M1 and -32P1, 

Production wells I-2A and I-2

-32M1

-32P1

0 I I I I I I I I I I itrf J I I I I I I I I M I I I I I I I I I I I M I I I I I I I I I M I I I I I I I

15

LU 10

rr LU CL 

co

< 

rr 

o

14N/3E-32Q3, Production well I-8

0 I I I I I I I I I I I I I I I I I I I I I I I I I I I M I I M I I I I M I I I I I I I M I I I I I I I

~ 15

<

rr

LU 

o

o 

o

< 

rr

10-

14N/3E-32F1 and-32L1, 

Production wells I-3A and I-3

-32F1

-32L1

15

10

14N/3E-32J1, Production well I-6

I l| I I II | ""M I II |ll I I|M ll|lll I | I II

13N/3E-5D1. Production well 1-1

14N/3E-32K1 and -32Q2, 

Production wells I-5A and I-5

-32K1 .

-32Q2

I I|IHT| M I 1 | M I I | M M| I I M | I I I I |TMI

14N/3E-32Q1, Production well I-4

14N/3E-32H1, Production well I-7 "

1940 45 50 55 60 65 70 75 80 85 90 1995 1940 45 50 55 60 65 70 75 80 85 90 1995 

YEAR YEAR

Figure 13. Time-series of nitrate concentrations of ground water from selected wells in Irwin Basin at Fort Irwin National Training Center, California, 1940-95.

Ground-Water Quality 27
-32Q1, the dissolved-solids and nitrate-N concentrations of samples from these wells have remained relatively stable (figs. 12 and 13). Because these wells are 

farther from the base housing and playing fields, they 

have not been affected by the irrigation-return flows. 

The unnamed fault also may retard the lateral movement of the degraded ground water. The dissolvedsolids concentrations in samples from wells 13N/3E32L1 and -32Q1 increased from about 500 mg/L to 

more than 600 mg/L; however, the nitrate-N concentrations remained about or less than 3 mg/L (figs. 12 and 

13). If the source of the increased dissolved-solids concentrations is the irrigation-return flow from the irrigated areas to the west, then the unnamed fault is not an 

effective barrier to ground-water flow in the upper 

aquifer. Continued monitoring is needed to determine 

the source and movement of the high dissolved-solids 

and nitrate concentrations.

Source and Age of Ground Water

Oxygen-18, deuterium, tritium, and 14C data 

were analyzed from ground water to determine the 

source and relative age of ground water in Irwin Basin. 

A total of 111 water samples were collected from 39 

wells drilled during this study, 22 existing wells, and 

one spring and were analyzed for oxygen-18 (818O) 

and deuterium (8D). Selected wells were analyzed for 

tritium (3H), and(or) 14C. The results of these isotopic 

analyses are given in table 8 (at back of report).

Oxygen-18 and Deuterium Isotopes

Oxygen-18 and deuterium are natural stable isotopes of oxygen and hydrogen, respectively. The ratios 

of isotopes of oxygen [oxygen-18 (18O): oxygen-16 

(16O)] and hydrogen [deuterium, D (2H): hydrogen 

(!H)] in ground water are indicators of its hydrologic 

history. The isotopic ratios are expressed in delta notation (8) as per mil (parts per thousand) differences relative to the standard known as Vienna Standard Mean 

Ocean Water (VSMOW) (Gonfiantini, 1978). Higher 

(less negative) concentrations of 818O and 8D represent 

enrichment in the heavier isotope of oxygen (oxygen18) and hydrogen (deuterium), respectively; and lower 

(more negative) 8 concentrations represent enrichment 

in the lighter isotope (depletion in the heavier isotope). 

There is a linear relation between 818O and 8D in meteoric waters throughout the world (Craig, 1961). This 

relation is referred to as the meteoric water line.

The 818O and 8D composition of ground water 

relative to the meteoric water line and relative to the 

isotopic composition of water from other sources can 

be an indicator of the source of ground water. The isotopic composition of ocean water undergoes fractionation during the transfer from the ocean surface to the 

vapor phase. Further fractionation occurs as water 

vapor condenses from the atmosphere, leaving the 

remaining water vapor relatively depleted in the 

heavier isotopes. Latitude, air temperature, and altitude 

also affect the fractionation of water vapor. The net 

result is that precipitation from a given storm becomes 

isotopically lighter as the storm moves inland, and precipitation that forms at lower temperatures is lighter 

than precipitation that forms at higher temperatures 

(Fournier and Thompson, 1980).

Evaporation also causes isotopic fractionation. 

When water is evaporated, the lighter isotopes of oxygen and hydrogen are preferentially partitioned into the 

vapor phase, causing the remaining water to be isotopically heavier. There is no further change in isotopic 

composition at the low temperatures of most groundwater systems after the recharge water has migrated 

below the depth for evaporation. Therefore, any subsequent changes in the isotopic composition of ground 

water along a flow line generally reflect only the mixing hi the aquifer system or concentration by evaporation in a discharge area.

Results of water analyses for oxygen and hydrogen isotopes are plotted graphically in figure 14. 

Springs generally are more suitable indicators of isotopic composition of recharge than are surface waters or 

precipitation because they represent shallow groundwater recharge after it is sufficiently below land surface 

to no longer be subjected to the effects of evaporation. 

The sample of Garlic Spring has -11.43 per mil 818O 

and -90.5 per mil 8D (fig. 14). The spring-water sample 

plots below the meteoric water line. A volumeweighted sample of local precipitation (Friedman and 

others, 1992) plots near the meteoric water line (fig. 

14). The local precipitation sample is isotopically 

heavier than the spring sample, indicating that presentday meteoric waters are not the source of recharge in 

this basin.

The oxygen and hydrogen isotopes for ground 

water of most of the production wells in Irwin Bashi 

plot near the Garlic Spring sample, below the meteoric

28 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
13N/3E-10E3 

7,080 7,060 7.040

13N/3E-4Q2 \ 

3,030 M

13N/3E-4G1 

944 933 O D 7,520

\ 13N/3E4B3 

O \

884

7,000 14N/3E-32Q3 

14N/3E-33Q1

762 822 

14N/3E-33R1

O Wells near wastewatertreatment facility

Wells near sanitarylandfill facility

D Wells near base housing 

>< Production wells

4- All other Irwin Basin 

wells

Wastewater-treatment 

facility

Garlic Spring

Precipitation-volumeweighted average

-110

-10 -9 

DELTA OXYGEN-18, IN PER MIL

Figure 14. Stable-isotope ratios for samples of ground water, spring water, precipitation, and municipal wastewater at Fort 

Irwin National Training Center, California, 1992-95. (Wells referred to in the text are numbered on this figure; the number is 

the dissolved-solids concentration for the sample indicated.)

water line (fig. 14). However, samples from wells near 

the wastewater-treatment facility and near the base 

housing plot far to the right of the Garlic Spring sample.

A primary source of recent recharge to wells near 

the wastewater-treatment facility is wastewater effluent 

and, to a lesser extent, runoff from local precipitation. 

Two samples of wastewater were collected from the 

wastewater-treatment facility: (1) wastewater influent, 

which is the untreated wastewater before it enters the 

treatment facility; and (2) wastewater effluent, which is 

the treated wastewater after it leaves the oxidation 

ponds. The wastewater influent sample plots among the 

samples from the production wells in Irwin Basin (fig.

14). The sample of wastewater effluent is isotopically 

heavier (concentrations are less negative) and plots to 

the right of the influent sample and most samples from 

wells in Irwin Basin (fig. 14). Because the wastewater 

effluent is affected by evaporation while it is in oxidation ponds, an evaporation trend line can be determined 

for Irwin Basin by drawing a line connecting the two 

wastewater samples on figure 14. This line has a slope 

of 4.3; a slope between 3 and 6 is indicative of water 

that has been affected by evaporation (International 

Atomic Energy Agency, 1981).

Use of effluent for irrigation would result in further evaporation and would make the irrigation return 

of effluent isotopically heavier and plot further to the

Ground-Water Quality 29
right on the evaporation trend line. The isotopic composition of water samples from wells near the 

wastewater-treatment facility (13N/3E-4B3, -4B4,

-4C3, -4G1, -4K1, -4Q2, -10E3, and 14N/3E-33R1) 

plot along the evaporation line, indicating that the 

water in these wells has been affected by evaporation 

(fig. 14). In conjunction with the water-quality data 

presented in a previous section of this report, the isotopic data indicate that recharge of wastewater effluent is 

a major source of water in the southeastern part of the 

basin. The samples that indicate the greatest evaporation are from wells 13N/3E-4B4, -4Q2, and -10E3. 

Wells 13N/3E-4B4 and -4Q2 are near the wastewatereffluent-irrigated golf course and sprinkler-pivot field, 

respectively. Irrigation-return flow would evaporate 

more than the wastewater effluent and would plot on or 

farther to the right of the evaporation trend line. Well 

13N/3E-10E3 is downgradient of the duck ponds. 

Recharge from the duck ponds may evaporate more 

than the wastewater effluent because the effluent is the 

source of water to the ponds.

In general, dissolved-solids concentrations are 

high in samples from wells that have had some evaporation (fig. 14,13N/3E-4B3, -4B4, -4C3, -4G1, -4K1,

-4Q2, -10E3, 14N/3E-32N3, -32Q3, -33Q1). This 

observation, along with the fact that dissolved-solids 

concentrations increase with depth in samples from 

lysimeters beneath the sprinkler-pivot field, indicates 

that dissolution of evaporite minerals may be a source 

of the increasing dissolved-solids concentrations. The 

relation between dissolved solids and 8D can be used to 

determine whether dissolution of soluble minerals or 

concentration by partial evaporation (evapoconcentration) is the predominant cause of increased salinity in 

ground water. If evaporation is the only process, 8D 

should increase more rapidly with increasing 

dissolved-solids concentrations. If dissolution of 

evaporites is the only process, 8D will not change. If 

dissolution of evaporites is the dominant process, 8D 

increases less rapidly than with evaporation, and 8D 

and dissolved-solids concentrations would not be well 

correlated. Two trends are evident in figure 15. Most of 

the samples lie along or near an evaporation line connecting the wastewater influent and effluent samples, 

indicating that evapoconcentration is the dominant 

cause of increased dissolved-solids concentrations in 

Irwin Basin. Some samples, however, plot above the 

evaporation line and have higher dissolved-solids concentrations in relation to 8D, indicating that dissolution

of evaporites may be an additional source of dissolved 

solids in these samples.

The isotopic ratios of ground water from three 

wells near the sanitary-landfill facility that contain high 

nitrate concentrations, but not high dissolved-solids 

concentrations, plot among the samples from the production wells in Irwin Basin (figs. 14 and 15). The samples from these three wells have less than 700 mg/L 

dissolved solids. The isotopic ratios of water from these 

wells, in conjunction with the water-quality data, indicate that the source water is similar to that of most 

wells in Irwin Basin and that it is not wastewater effluent.

The isotopic ratios of water from wells near the 

base housing plot along the evaporation trend line (fig. 

14), indicating that the water is evaporated. Because 

ground water is more than 10 ft below land surface in 

the study area, evaporation from the water table is not 

the cause of the observed isotopic distribution. If the 

source water for these samples was untreated wastewater from leaking underground sewer pipes, these samples probably would not be evaporated because the 

sewer pipes are 5 to 10 ft below land surface. However, 

irrigation-return flow from green areas in the base 

housing would be partly evaporated. Therefore, 

irrigation-return flow from the base-housing area probably is the source of the high nitrate and dissolvedsolids concentrations in this part of the basin. Preliminary nitrogen isotope data for these samples seem to 

support this conclusion.

Tritium and Carbon-14

Tritium (3H) is a natural radioactive isotope of 

hydrogen having a half-life of 12.4 years. Tritium is 

measured in tritium units (TU) in the analyses presented here. Each tritium unit equals one atom of tritium in 1018 atoms of hydrogen. Approximately 800 kg 

of 3H was released as a result of the atmospheric testing 

of nuclear weapons during 1952-62 (Michel, 1976). As 

a result, 3H concentrations in precipitation and ground 

water that were recharged during that time increased. 

Because 3H is part of the water molecule and concentrations are not strongly affected by reactions other 

than radioactive decay, it is an excellent tracer of the 

movement and relative age of water on time scales 

ranging from 0 to 45 years before present (1997).

Carbon-14 (14C) is a natural radioactive isotope 

of carbon that has a half-life of about 5,730 years. The 

14C data are expressed as percent modern carbon by 

comparing 14C activities to the specific activity of

30 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
J^UU

3,000

0- 2,800

LU1-

-i 2.600 

cr

LU 

Q_

co 2,400

g 2200

2 2,000

Z

.IDS CONCENTRATION,

 1 o 

J? 1,000

UJ

>

^ 800

0) 

CO

Q 600

400 

-1

i ' i ' i i i ' i i i i ' i ' i ' i i '

O 

O Wells near wastewater-treatment facility

* Wells near sanitary-landfill facility 

*£ Wells near base housing 

-V Production wells

-+- All other production wells 

 Wastewater-treatment facility 

A Garlic Spring

-

-

-

-

tt-4. ^-i-^i^ihtr^

^^P^F?

1,1.1

00-98-96-94

0 °

c'

"o

CO 

CO

Q

-o o H 

o o ^ *«

-|- _;_ ^____ S 

v

00 

0

-.^ ^ "/

____ -, 

 ^iporation &

rwV^-'^ $

y^-^' -c- ' _^

1 1 1 , 1 , 1 1 1 . 1 , 1 , 1 , 1 , 1

-92-90-88-86-84-82-80 -78 -76 -74 -72

DELTA DEUTERIUM, IN PER MIL

Figure 15. Relation between dissolved solids and delta deuterium in ground-water samples from wells in Irwin Basin at Fort 

Irwin National Training Center, California.

National Bureau of Standards oxalic acid (12.88 disintegrations per minute per gram of carbon in the year 

1950 equals 100 percent modern carbon). Atmospheric 

testing of nuclear weapons also produced 14C. As a 

result, C activities can exceed 100 percent modern 

carbon in areas where ground water contains 3H. The 

14C is a tracer of movement and of the relative age of 

water on time scales ranging from several hundred to 

more than 20,000 years before present (1997). Because 

14C is not part of the water molecule, 14C activities are 

affected by chemical reactions between dissolved constituents and aquifer material. Relative ages must be 

corrected using carbon-13 (13C) data to evaluate chemical reactions in an aquifer in order to get the actual age 

of the water. The 13C composition is expressed in delta

notation (8) as parts per mil differences relative to the 

ratio of 13C to carbon-12 (12C) in standard Peedee 

belemnite, in a manner similar to that used for 18O and 

D. Uncorrected 14C data are used in this report to give 

an apparent age. In parts of the Mojave Desert outside 

the study area, apparent age can be as much as 10,000 

years older than the corrected 14C age (Izbicki and others, 1995).

In this paper, ground water having 3H concentrations less than the detection limit of 0.2 TU is interpreted as water recharged before 1952; ground water 

having detectable levels of 3H is interpreted as water 

recharged after 1952. Also, ground water having 14C 

activities less than 90 percent modern carbon is interpreted as being recharged before 1952; ground water

Ground-Water Quality 31
116°43'R2ER3E 116°39'

T14N 

T13N

Boundary of Aquifer System 243 

(Approximate)

Drainage Basin / 

Boundary \ /

H

Unconsolidated deposits 

Consolidated rocks

 ? Fault- Dashed where 

approximately located; 

queried where uncertain; 

dotted where concealed 

Well and number-

® Production

© Test

 Installed by USGS

EXPLANATION

r Well number 

4C14C2 4C3^ First number is

/ tritii

Aquifer system boundary modified from 

Wilson F. So and Assoc., 1989

Potential sources of ground-water degradation-

>0.2/ 

13.5

>0.2/ 

13.2

0.2/- tritium, in tritium 

units; second number

220

320'

s 150\ is cartion-14, in percent modem cartxin. 

(-) indicates no data

Depth of well, in feet 

below land surface

1 f Sprinkler-pivot 

i field ~ J^ .Golf course

2 f " " Sanitary-landfill

 *.. 'JaC!'ity . , . ^ Soccerfield 31; Wastewater-treatment facility 8 g Baseball field

4/7 Old biological- 9 M Army ball field

^^ evaporation ponds ..,.,,, 

5^ Duck ponds 10 gg Base housing

Figure 16. Tritium and carbon-14 data for ground water from selected wells in Irwin Basin at Fort Irwin National Training 

Center, California.

32 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
having 14C activities greater than 90 percent modern 

carbon is interpreted as being recharged after 1952.

Water from only 3 of 14 wells sampled in Irwin 

Basin contains measurable concentrations of 3H (fig. 

16), indicating that water throughout most of Irwin 

Basin was recharged before 1952. The wells with water 

that contains 3H (14N/3E-32K6, -32P6,13N/3E-4G1), 

which indicates that there has been some recent 

recharge, are in areas where recent recharge might be 

expected. Wells 14N/3E-32K6 and -32P6 are in areas 

previously identified as being affected by irrigationreturn flow from the base housing green areas. Well 

14N/3E-4G1 is downgradient of the wastewatertreatment facility. All of these wells are perforated near 

the water table. Because 3H in water vapor in the atmosphere exchanges with standing water with time, concentrations of 1 to 3 TU would not be uncommon for 

recharge from irrigation-return flow or from the oxidation ponds (Robert Michel, U.S. Geological Survey, 

oral commun., 1996). In addition, because 3H hi 

present-day precipitation is between 2 and 5 TU (Robert Michel, U.S. Geological Survey, oral commun., 

1996), any precipitation during irrigation or directly 

into the oxidation ponds would increase the 3H concentration of the recharge water.

Measured 14C activities for water from 13 wells 

in Irwin Basin ranged from 5.7 to 92.6 percent modern 

carbon (fig. 16). In general, 14C activities are higher 

where 3H is present and lower where 3H is low or 

absent. Eleven of the samples had 14C activities of less 

than 20 percent modern carbon, indicating that most of 

the basin has not been readily recharged under current 

climatic conditions. The uncorrected 14C data (relative 

age) indicate that ground water in Irwin Basin was 

recharged between 14,000 and greater than 40,000 

years before present (1997). Two samples had 14C 

activities of greater than 20 percent modern carbon. 

The sample from well 13N/3E-10E3 had a 14C activity 

of 92.6 percent modern carbon. High nitrate and high 

dissolved-solids concentrations also were detected hi 

this well. The high dissolved-solids and nitrate concentrations and the modern carbon in this well hldicate that 

the recharge is wastewater effluent that infiltrates from 

the duck ponds. The sample from well 14N/3E-32K6 

had a 14C activity of 21.9 percent modern carbon, indicating relatively old water; however, water from this 

well also contained measurable 3H (fig. 19), which 

indicates that there is mixing between old (as indicated 

by low 14C activity) and young (as indicated by 3H)

water in this well. The recent water may be mounded at 

the top of the water table.

SUMMARY AND CONCLUSIONS

Fort Irwin National Training Center (NTC) is 

about 35 mi northeast of Barstow in the northern part 

of the Mojave Desert, California. Irwin Basin is one of 

three basins currently (1997) supplying water to the 

U.S. Army at Fort Irwin NTC with additional water 

being supplied by nearby Bicycle and Langford Basins.

Irwin Basin is surrounded and underlain by consolidated rocks which consist of igneous, metamorphic, and volcanic rocks. These rocks are mainly 

nonwater-bearing, except for the upper few tens of feet 

of the igneous and metamorphic bedrock in which a 

zone of secondary porosity has developed because of 

weathering and fracturing. These rocks are considered 

to be the base of the aquifer system in the basin. Overlying the bedrock, the basin is filled with as much as 

950 ft of unconsolidated deposits consisting of older 

and younger alluvium and lacustrine deposits. The 

older alluvium yields moderate amounts of water but is 

less transmissive with depth. The younger alluvium 

overlies the older alluvium on most of the valley floor. 

Although most of the younger alluvium lies above the 

water table, these deposits, where saturated, are capable of yielding large quantities (as much as 1,000 gal/ 

min) of water to wells.

The area has been dissected by numerous faults 

that seem to influence the shape of the basin. Most of 

these faults disappear beneath the unconsolidated 

deposits when they reach the margins of the valley 

floor. The Garlic Spring Fault has been mapped as 

extending out into the unconsolidated deposits and it 

probably cuts through the younger and older alluvium 

in the southeastern part of the basin. Water-quality data 

indicate that this fault is at least a partial barrier to 

ground-water flow. The bedrock surface deepens to the 

southwest across the Garlic Spring Fault and a parallel 

fault.

The aquifer system in Irwin Basin consists of an 

upper unconfined aquifer and lower confined aquifer. 

The upper aquifer is contained in the saturated younger 

alluvium and reaches a maximum thickness of about 

200 ft. The lower aquifer is contained in the older alluvium and the underlying weathered/fractured bedrock 

and reaches a maximum thickness of more than 600 ft. 

The upper aquifer generally has higher transmissivities

Summary and Conclusions 33
than the lower aquifer and produces most of the water 

from the aquifer system.

Natural recharge in Irwin Basin is from precipitation in the drainage basin and has been estimated to 

be about 150 acre-ft /yr (C.F. Hostrup and Associates, 

1955). The primary natural discharge from the groundwater system in Irwin Basin is underflow beneath the 

unnamed wash near Garlic Spring. Before 1941, prior 

to ground-water development, the underflow was equal 

to the natural recharge to the basin.

Ground-water pumpage in Irwin Basin has 

ranged from 33 acre-ft in 1941 to 1,927 acre-ft in 1987. 

Most of the water not used in the basin, about 58 to 70 

percent of the water pumped at the base, is discharged 

to a wastewater-collection system and -treatment facility.

Wastewater was collected in biologicalevaporation ponds from 1941 to 1955 and currently 

(1997) is treated and disposed of in evaporation ponds, 

through sprinkler systems to a driving range and golf 

course, and finally through sprinkler systems to the 

southeast part of the basin. Most of the wastewater that 

goes to the treatment facility is evaporated; however, 

some of the wastewater recharges the underlying 

ground water. Estimates of wastewater recharge from 

1941 to 1993 ranged from 0 to 1,486 acre-ft/yr and 

averaged 650 acre-ft/yr for the minimum estimate of 

wastewater inflow and 780 acre-ft/yr for the maximum 

estimate. During 1942-45,1951-55, 1957, and 1960- 

93, wastewater probably was recharging the basin, but, 

during 1969-70,1972-80,1983,1985, and 1991-93, 

estimated ground-water recharge from wastewater 

approached or exceeded pumpage in Irwin Basin.

The infiltration of water used to irrigate lawns 

and playing fields that is not consumptively used by the 

plants is another source of recharge not present before 

the development of the base. Irrigation-return flows are 

estimated at about 90 acre-ft/yr during the 1960's to 

early 1980's and about 210 acre-ft/yr from the early 

1980's to present (1997).

Ground-water levels in Irwin Basin respond 

directly to changes in pumpage. Water levels in the 

central part of Irwin Basin have declined slightly more 

than 30 ft since 1941, mostly between 1953 and the late 

1960's. During the 1970's, water levels in the basin 

recovered because of the reduction of pumping from 

Irwin Basin, the importation of water from Bicycle 

Basin, and a decrease in activity at the base. In the early 

1980's, pumping in the basin began increasing, and by 

1993, water levels had declined to the levels measured

in the late 1960's. Ground-water levels seemed stable 

between 1993 and 1995, but declining water levels during 1995-96 indicate that pumpage must have exceeded 

recharge during this time.

The 1994 water-table contour map indicates that 

a cone of depression has developed beneath Irwin 

Basin well field and that a ground-water mound has 

developed beneath the wastewater-effluent disposal 

sites. High water levels and a steep ground-water gradient near the wastewater-effluent disposal sites may 

result from several factors: (1) recharge from wastewater effluent being disposed of in this area; (2) the aquifer in this area is primarily composed of older 

alluvium, which has a lower transmissivity than the 

younger alluvium in the central part of the basin; and 

(3) the barrier effect of the Garlic Spring Fault, which 

separates this area from the central part of the basin. 

Water-level data from multiple-well monitoring sites 

indicate that a general downward vertical gradient 

exists between the upper and lower aquifer.

Ground-water quality in Irwin Basin varies 

areally in the water-bearing deposits. Water in most of 

Irwin Basin is sodium based with sulfate, chloride, and 

bicarbonate as the primary anions. Calcium and 

sodium are the primary cations from wells in the southeast part of the basin near the wastewater-treatment 

facility. Dissolved-solids and nitrate concentrations are 

used to describe the area! variation in water quality.

The dissolved-solids concentrations of water 

throughout Irwin Basin range from 433 to 6,380 mg/L 

and that of native ground water ranges from 540 to 645 

mg/L. In general, dissolved-solids concentrations are 

higher in the upper aquifer than they are in the lower 

aquifer because the upper aquifer is more easily contaminated from surface infiltration. High dissolvedsolids concentrations are in the southeastern part of 

Irwin Basin near the wastewater-treatment facility, golf 

course, and sprinkler-pivot field. The highest 

dissolved-solids concentrations (2,140-6,380 mg/L) 

are in porewater from four lysimeters and a water-table 

well beneath the sprinkler-pivot field. The fact that the 

dissolved-solids concentrations of the porewater 

increase with depth in the unsaturated zone beneath the 

sprinkler-pivot field suggests that the wastewater effluent leaches salts from the unsaturated zone. This area is 

the lowest part of the basin, and evaporite deposits are 

in the surface deposits as a result of evaporation from 

surface water collecting in this area. When water is 

added, the evaporite deposits are leached and migrate 

downward to the water table.

34 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
The ground water of high dissolved-solids concentration is migrating northwestward toward the 

pumping depression. Westward horizontal migration of 

the water is retarded at depth by the Garlic Spring 

Fault, which acts as a partial barrier to ground-water 

flow near the wastewater-treatment facility. Water from 

wells east of Garlic Spring Fault contains moderate to 

high dissolved-solids concentrations (863-1,523 mg/ 

L) throughout the saturated thickness, whereas water 

from wells west of the fault contains high dissolvedsolids concentrations (greater than 700 mg/L) in the 

upper aquifer and low dissolved-solids concentrations 

(less than 700 mg/L) in the lower aquifer. Downward 

vertical movement of high dissolved-solids concentration water seems to be impeded by the fine-grained 

deposits in the older alluvium in the southeastern part 

of the basin near the wastewater-treatment facility.

Nitrate-N concentrations in excess of 5 mg/L are 

in ground water in three areas of Irwin Basin: (1) near 

the wastewater-treatment facility, (2) near the northern 

end of and beneath the sanitary-landfill facility, and (3) 

in the west central part of the basin. Nitrate-N concentrations in excess of 10 mg/L, the maximum contaminant level of nitrate as nitrogen, are in water beneath 

and adjacent to the wastewater-treatment facility in a 

plume that extends about 0.5 mi northwest of the treatment facility and about 0.25 mi southeast of the duck 

ponds. No known horizontal barriers exist between the 

nitrate plume and the base production wells. The time 

required for the nitrate plume to reach the nearest production well was estimated at about 43 years by a 

Darcy's law calculation. Actual movement may take 

place faster or slower than calculated.

High nitrate concentrations are in water from 

wells north of and beneath the sanitary-landfill facility. 

High nitrate concentrations are an unlikely result of 

wastewater recharging the aquifer beneath the wastewater-treatment facility. High nitrate and dissolvedsolids concentrations also are near the center of the 

base in Irwin Basin. Possible sources of the nitrate are 

wastewater leakage, fertilizer used on lawns and playing fields, and natural soil nitrate. Nitrogen isotopic 

data are being analyzed to help determine the source of 

the high nitrate concentrations.

Changes in dissolved-solids and nitrate concentrations have been observed since water-quality data 

collection began with the construction of the first production well in 1941. Dissolved-solids and nitrate-N 

concentrations in water from production wells that are 

west of an unnamed fault in Irwin Basin have increased

since 1941. Irrigation-return flows and mobilized natural nitrate from the base housing area and the soccer 

and Army ball fields may be the source of the increased 

concentrations. With the exception of two wells, 

dissolved-solids and nitrate-N concentrations in water 

from production wells that are east of the unnamed 

fault have remained relatively stable. Although the 

unnamed fault may retard lateral movement of the 

degraded water, continued monitoring is needed to 

determine this.

The stable isotopes of oxygen and hydrogen, tritium, and 14C data were collected to determine the 

source and relative age of ground water in Irwin Basin. 

Oxygen-18 and deuterium ratios in water from a spring 

and most of the production wells in Irwin Basin indicate that present-day precipitation is not a major source 

of recharge in this basin. Tritium data indicate that most 

water in Irwin Basin was recharged before 1952. The 

apparent age from the uncorrected 14C data indicate 

that water in undisturbed areas of Irwin Basin is from 

14,000 to more than 40,000 years old.

REFERENCES CITED

C.F. Hostrup and Associates, 1955, Water resources survey, 

Camp Irwin, California: 109 p.

Craig, H., 1961, Isotopic variation in meteoric waters: Science, v. 133, p. 1702-1703.

Driscoll, F.G., 1986, Groundwater and wells: St. Paul, Minnesota, Johnson Division, p. 168-200.

Earthlnfo, Inc., 1994 [1995], Earthlnfo CD2 reference manual for all Earthlnfo CD-ROM databases: Boulder, 

Colorado, Earthlnfo, Inc.

 1995, National Climatic Data Center summary of the 

day West 1994: Boulder, Colorado, Earthlnfo, Inc. 

One CD-ROM.

Folk, R.L., 1954, The distinction between grain size and 

mineral composition in sedimentary-rock nomenclature: Journal of Geology, v. 62, no. 4, p. 344-359.

 1980, Petrology of sedimentary rocks: Austin, Texas, 

Hemphill Publishing, p. 25-28.

Fournier, R.O., and Thompson, J. M., 1980, The recharge 

area for the Coso, California, geothermal system 

deduced from 5D and 518O in thermal and nonthermal 

waters in the region: U.S. Geological Survey Open-File 

Report 80-454, 27 p.

Friedman, Irving, Smith, G.I., Gleason, J.D., Warden,

Augusta, and Harris, J.M., 1992, Stable isotope composition of waters in southeastern California, 1. Modern 

precipitation: Journal of Geophysical Research, v. 97, 

no. D5, p. 5795-5812.

References Cited 35
Gonfiantini, R., 1978, Standards for stable isotope measurements in natural compounds: Nature, v. 271, p. 534- 

536.

International Atomic Energy Agency, 1981, Stable isotope 

hydrology: Deuterium and oxygen-18 in the water 

cycle, Gat, J.R., and Gonfiantini, R., (eds.):Vienna, 

International Atomic Energy Agency, p. 31.

Izbicki, J.A., Martin, P.M., and Michel, R.L., 1995, Source, 

movement, and age of ground water in the upper part of 

the Mojave River Basin, California, U.S.A., in Adar, 

E.M., and Leibundget, Christian, eds., Application of 

tracers in arid zone hydrology, p. 43-56.

James M. Montgomery and Associates, 1981, Water supply 

investigation, Fort Irwin, San Bernardino County, California. Phase n, Final report on ground water basin 

development and management: Consultant's report prepared for and in the files of the U.S. Army Corps of 

Engineers.

Keys, W.S., and MacCary, L.M., 1983, Application of borehole geophysics to water-resources investigations: U.S. 

Geological Survey Techniques of Water-Resources 

Investigations, book 2, chap. El, 126 p.

Kunkel, Fred, and Riley, F.S., 1959, Geologic reconnaissance and test-well drilling, Camp Irwin, California: 

U.S. Geological Survey Water-Supply Paper 1460-F, 

271 p.

Michel, R.L., 1976, Tritium inventories of the world oceans 

and their implications: Nature, v. 263, p. 103-106.

Munsell Color, 1975, Munsell soil color charts: Baltimore, 

Maryland, Munsell Color, Macbeth Division of Kollmorgen Corporation.

National Oceanic and Atmospheric Administration, 1994, 

Climatological data, annual summary, California, 1994: 

Asheville, North Carolina, v. 98, no. 13.

National Research Council, 1947, Report of the subcommittee on sediment terminology: Eos, Transactions of the 

American Geophysical Union, Abstracts, v. 28, no. 6, p. 

936-938.

 1978, Nitrates: An environmental assessment: Washington, D.C., National Academy of Sciences, 723 p.

Stiff, H.A., Jr., 1951, The interpretation of chemical water 

analysis by means of patterns: Journal of Petroleum 

Technology, v. 3, no. 10, p. 15-17.

Umari, M.J., Martin, Peter, Schroeder, R.A., Duell, F.W., and 

Fay, R.G., 1993, Potential for ground-water contamination from movement of wastewater through the unsaturated zone, upper Mojave River Basin, California: U.S. 

Geological Survey Water-Resources Investigations 

Report 93-4137, 117 p.

U.S. Environmental Protection Agency, 1991, Drinking 

water standards and health advisory table: San Francisco Drinking Water and Groundwater Protection 

Branch, Region 9, 19 p.

 1994, Drinking water regulations and health advisories table: San Francisco Drinking Water and Groundwater Protection Branch, Region 9, 15 p.

Wilson F. So and Associates, 1989, U.S. Army National 

Training Center at Fort Irwin California, water basin 

development plan, final report, June 1989: Consultant's 

report prepared for and in the files of the Commander of 

the National Training Center at Fort Irwin, 85 p.

Yount, J.C., Schermer, E.R., Felger, T.J., Miller, D.M., and 

Stephens, K. A., 1994, Preliminary geologic map of Fort 

Irwin Basin, north-central Mojave Desert, California: 

U.S. Geological Survey Open-File Report 94-173,25 p.

APPENDIX A

Lithoiogic Logs

Lithologic logs were compiled from descriptions 

of drill cuttings collected at each borehole and from 

observations recorded during logging. The cuttings, 

collected at 20-ft intervals and at distinguishable 

changes in lithology, were described by rock type, texture, sorting, rounding, color, mineralogy, and any 

other significant features. Texture descriptions follow 

the National Research Council (1947) grain-size classification. This classification allows for correlation of 

general grain-size terms (such as "sand") to size limits 

in millimeters or inches. Color, determined on moist 

samples, follows the numerical color designations in 

the Munsell Soil Color Charts (Munsell Color, 1975). 

Detailed lithologic descriptions for the boreholes are 

given in tables 9 through 25 (at back of report).

Generalized lithologic columns for each site 

were compiled by grouping similar lithologic units 

determined from the detailed lithologic logs (figs. IT33). Borehole geophysical logs were used to identify 

the depths of contacts between the lithologic units. The 

lithologic units were categorized using the nomenclature of Folk (1954, 1980) for 15 textural groups (fig. 

34).

36 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Borehole Geophysics

Geophysical logs were made for the boreholes at 

each multiple-well monitoring site immediately after 

completion of drilling. The logs of the uncased boreholes, which were filled with drilling mud, include 16- 

and 64-in. normal resistivity, lateral (6-ft) resistivity, 

spontaneous potential, natural gamma, and caliper logs 

(fig. 17) and sonic logs for sites 9N/1W-10J12-15, 

-11K12-15, -12L2-5, and -12N4-7. The logs provide 

information on the character of the formations and on 

the presence and quality of ground water. Data from the 

geophysical logs were used in conjunction with the 

lithologic logs to determine the placement of the piezometers.

Resistivity devices measure the evident resistivity of a volume of rock under the direct application of 

an electric current (Keys and MacCary, 1983). Resistivity logs are used to determine formation resistivity, 

formation porosity, and fluid resistivity. In general, low 

resistivity indicates a presence of fine-grained deposits, 

such as silt, clay, and shale; whereas, high resistivity 

indicates a presence of coarse-grained materials, such 

as sand and gravel.

Spontaneous-potential (SP) devices measure 

voltage differences between the borehole fluid and the 

surrounding rock (Keys and MacCary, 1983). SP logs 

are used mainly for correlating geologic units, determining bed thickness, and differentiating between nonporous and porous beds. This type of log commonly 

has a baseline that corresponds to impermeable beds 

such as clay or shale. Deflections to the left of this baseline correspond to the positions of permeable strata if 

the formation water is less resistive (more saline) than 

the drilling mud. The opposite is true if the formation 

water is more resistive than the drilling mud.

Natural gamma logs measure the intensities of 

gamma-ray emissions resulting from the natural decay 

of potassium-40 and of the daughter products of uranium and thorium. The gamma logs are used primarily 

as lithology indicators and for geologic correlation. 

Clay and feldspar-rich gravel and granite generally 

emit higher intensity gamma rays (Driscoll, 1986). In 

the logs completed for this study, an increase in gamma 

intensity generally corresponds with an increase in granitic materials in the deposits.

Caliper devices measure the diameter of the 

borehole. The caliper log can be used to indicate "cavein" in unconsolidated sand or to indicate swelling clay.

SP1 (13N/3E-4B1,-4B2,-4B3)

Spontaneous Gamma ray,

Caliper, potential, in counts 16-inch resistivity, 64-inch resistivity, Lateral resistivity, Temperature,

in inches in millivolts per second in ohm-meters in ohm-meters in ohm-meters in degrees

Q 20-25 250 2000 1000 ______1000 10060 Fahrenheit 80

- 50 LLJ

O

100

150

200

250

Figure 17. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: SP1 (13N/3E-4B1, -4B2, -4B3).

Appendix A 37
NITS (13N/3E-4B4, -4B5LYS, -4B6LYS, -4B7LYS, 4B8LYS)

Well

construction Lithology Descriptions

01

LJ_

z

Ol

ND SURFAC

i3

< OU

§

01 

CO

X

Q. 

01

 inn

sz

oSo^oSS

- X' - - ~,

r- , _^ j_ _

-'. -^ :~ '--.' .' -

- -.'- :-

;l|^§Sc|s:

Muddy sandy gravel

Sandy gravel

Muddy sandy gravel

Figure 18. Well-construction diagram and stratigraphic 

column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: 

NITS (13N/3E-4B4, -4B5LYS, -4B6LYS, -4B7LYS, 

-4B8LYS).

WC1 (13N/3E-4C1,-4C2,-4C3)

t 50

f 100

150

200

250

300

Spontaneous Gamma ray, .-. . .... ...,_ . . Temperature, Well Caliper, potential, in counts 16-inch resistivity, 64-inch resistivity, Lateral resistivity, in degrees construction

n inches in millivolts per second in ohm-meters in ohm-meters in ohm-meters Fahrenheit / Litholoav . .

I 20-25 250 2000 1000_______1000_______10090 hanrennel1 11Q / Minol°gy Descriptions

o'»'°'°'

Pljl

tr-foi'C

HI

|||

;;:j§S:i:

^

Slightly gravelly 

sand

Gravelly sand

Slightly gravelly 

sand

Slightly gravelly 

muddy sand

Sandy mud

Granite 

(fractured)

Mud

Figure 19. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: WC1 (13N/3E-4C1, -4C2, -4C3).

38 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
WC2 (13N/3E-4D1.-4D2,-4D3)

Spontaneous Gamma rav, . . ..... Temperature, Well Cahper, potential in counts 16-inch resistivity, 64-inch resistivity, Lateral resistivity, in degrees construction

in inches in millivolts per second _ _in ohm-meters ___ in ohm-meters__ ^ in ohm-meters^ ^ Fahrenheit

20-25 250 2000 1000 1000 10080 100

50

100

150

200

250

300-

Lithology Descriptions

a fft".

X'T'f

$,&,£,, 

|>°'|"

I'l'l''

s~:

-.-.-,'.'

Slightly gravelly 

sand

Sand

\

Gravelly sand

Sand

Muddy sand

Sand

Muddy sand

Sand

Figure 20. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: WC2 (13N/3E-4D1, -4D2, -4D3).

NIT2 (13N/3E-4K2, -4K3, -4K4)

o i- Spontaneous Gamma ray, .Caliper, potential, j n counts 

in inches . in millivolts per second 

n O 2050 100Q________ 2000

Temperature,

1 6-inch resistivity, 64-inch resistivity, Lateral resistivity, in degrees 

in ohm-meters, in ohm-meters, in ohm-meters Fahrenheit Litholoav

1000 10080 an 100 ° 9y Descriptions

Well 

construction

1000

r 50

£100

150

UJ 

CO

1 200

t

UJ

Figure 21. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: NIT2 (13N/3E-4K2, -4K3, -4K4).

Appendix A 39
NIT1 (13N/3E-4Q2, -4Q3LYS, -4Q4LYS, -4Q5LYS, -4Q6LYS)

Lithology Descriptions

Well 

construction

50

100

Muddy sandy gravel

Figure 22. Well-construction diagram and stratigraphic 

column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: 

NIT1 (13N/3E-4Q2, -4Q3LYS, -4Q4LYS, -4Q5LYS, 

-4Q6LYS).

AD1 (13N/3E-8B1)

Caliper, 

in inches 

0 20

Spontaneous 

potential, 

in millivolts 

-25 250

Gamma ray,

in counts 16-inch resistivity, 64-inch resistivity, Lateral resistivity, 

per second in ohm-meters, in ohm-meters, in ohm-meters _ . - . .

2000 1000 1000 10080 hanrenneit 100

Temperature, 

in degrees

50

UJ

2 100

CO

o

5 150

GJ 200

CD

i

g250 

277

Well

construction 

Lithology

/ Descriptions

Figure 23. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: AD1 (13N/3E-8B1).

40 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
WC3 (13N/3E-10E1,-10E2,-10E3)

Spontaneous Gamma ray, 

Caliper, potential in counts 

In inch* Q m millivolts ^ per second ^

- 50

LLJ

o

100

'150

200

250

16-inch resistivity, 64-inch resistivity, Lateral resistivity, 

in ohm-meters, in ohm-meters, in ohm-meters Fahrenheit li-»h~io,,,,

1000 1000 10070 Fahrenheit 90 /^thology Descriptions

Temperature, 

in degrees

Well 

construction

j

r"

o'jfjr'f

J5;J:

-;-;-:->

11

2'X'o

Sand

Slightly gravelly 

sand

Sandy mud

Muddy sand

Sandy mud

Slightly gravelly 

\ sand

Sandy mud

Slightly gravelly 

sand

Figure 24. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: WC3 (13N/3E-10E1, -10E2, -10E3).

Appendix A 41
NH1 (14N/3E-32B1,-32B2,-32B3)

50

100

150

H200

til 

u.

uj250 

o

Jo 30°

Q 

<

§350 

O

1400

Q. 

Ill 

Q

450

500

550

600

650

Spontaneous 

Caliper, potential, 

in inches j n millivolts 

0 20-50 0 0

G?icountey' 16-inch resistivity, 64-inch resistivity, Lateral resistivity, TfnmdPeeqrfeeSe' 

per second in ohm-meters, in ohm-meters _ in ohm-meters Fahr|nheit

2000 1000 1000 10080 100

Well 

construction

Lithology DesCriPtions

Gravelly sand

Muddy sandy 

gravel

Muddy sand

Gravelly muddy 

sand

Slightly gravelly 

sand

Slightly gravelly 

muddy sand

Gravelly sand

Muddy sandy 

gravel

Sandy gravel j

Gravel

;g Bedrock (volcanic)

Figure 25. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center; California: NH1 (14N/3E-32B1, -32B2, -32B3).

42 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
BASEBALL (14N/3E-32F2, -32F3)

Spontaneous 

Caliper, potential, 

in inches j n millivolts 

0 20-25 250

Well 

construction

50

100

uJ 150

200

CO

Q 250

O 300 

DJ

CD

X

350

400

450

500

in counts 16-inch resistivity, 64-inch resistivity, Lateral resistivity, Temperature, 

per second in ohm-meters, in ohm-meters, in ohm-meters Fahflnheit / Litholom/

2000 1000 1000 10080 hanrenneit 100 / LitlKJlogy Descriptions m K?y>M " 

Gravelly muddy 

sand

Sandy 

gravel

Gravelly 

sand

Sandy 

gravel

Muddy 

sand

Sandy 

gravel

Sand

Figure 26. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: BASEBALL (14N/3E-32F2, -32F3).

Appendix A 43
FI1 (14N/3E-32K3, -32K4, -32K5, -32K6)

Caliper, %°oSi1T ^c^ntf

in inche^ 33o inmi,,ivo,ts48oo per second^

16-inch resistivity 64-inch resistivity, Lateral resistivity, 

in ohm-meters ' in ohm-meters in ohm-meters cQh,~nhQit 10080 ranrennen 100

Temperature, 

in degrees

Well 

construction

1000 1000

50

100

LLJ 

111 "- 150

z

LU

o

if 200 

<r

250

300

2j 350 O

400

450

493

Descriptions

D/0,0,1 

°>°>S><

I't'i''

lil ?'§.'?''

liil

|||

r«-^l

°;%*

§5 pi? 

sjp^f

Gravelly sand

Gravelly muddy sanri

Gravelly sand

S'm%gr»

Gravelly sand

Slightly gravelly 

muddy sand

Slightly gravelly 

sand

Gravelly muddy 

sand

Sand

Granite

Figure 27. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: FI1 (14N/3E-32K3, -32K4, -32K5, -32K6).

44 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
SOC2 (14N/35-32N1.-32N2,-32N3)

Calioer Spontaneous Gamma ray, !_;_rL-L potential, 

in millivolts in ohm-meters in ohm-meters

1000 1000

Temperature, Well 

in degrees construction

100 go Fahrenheit 1QQ I Lithojpgy Descriptions

___ i o.o'o'j, Q to-f£>jp Sliahtlv nravfillv

"'fiff 

"p.ff 

°fpp "t6,"^ »>»,?>» ;«/>; 

t,9fi.f

'?.*,' 

° fo>«v

o,o.^>" v,°.'

°:,°f>.,°, 

V<V et t*>Df6'

°',*ie.,°, 

*M#\ 

°F,?S,, ?i!>p?,

"P,0^;

Slightly gravelly 

sand

Sand

Slightly gravelly 

sand

Sand

Slightly gravelly 

sand

Sand

Figure 28. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: SOC2 (14N/3E-32N1, -32N2, -32N3).

Appendix A 45
SOC1 (14N/3E-32P2, -32P3, -32P4, 32P5, -32P6)

50

100

150

200

250

300

Caliper, SPn°^?°us Gpnmrm,mtty' 16-inch resistivity. 64-inch resistivity, Lateral resistivity,

in inches .Potential, c £<i in ohm-meters" in ohm-meters' in ohm-meters Fahrenheit

0 2050 inmllllvolts 1000 Persec°nd 2000 1000 ___1000 _____10090

Well 

construction

110 litholpgy Descriptions

350

$400 tr

Z) 

CO 

Q

Z450 <t

UJ500 

m

T 

§550

6001-

650

700

750

800

850

900:

Sandy gravel

Gravelly sand

Gravelly muddy | sand

Gravelly sand

Muddy sand

Sand

Muddy sand

Slightly gravelly j muddy sand

Sandy mud

Muddy sand

Sandy mud

Figure 29. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: SOC1 (14N/3E-32P2, -32P3, -32P4, -32P5, -32P6).

46 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
BC1 (14N/3E-33A1)

<-oii~«. Spontaneous Caliper, potential, 

in inches in millivolts 

0 20-25 250

^Slfnte* 16"inch resistivity, 

per second in ohm-meters, 

2000 3C

64-inch resistivity, 

in ohm-meters,

50

 'u. 

|S ,00

HI 

CQ

I 150

185

Lateral resistivity, in degrees W?L irtion

in ohm-meters Fahrenheit OTnsirVclon

30030 hanrenne11 110 / Lithology Descriptions

Sand

Weathered schist

Granite (fractured)

Figure 30. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: BC1 (14N/3E-33A1).

PICNIC (14N/3E-33E2, -33E3)

r*\\ Caliper, ne> r 

in inches

- 50

LLI

§100

CO 

Q

^ 150

1LLI 

10 200

250

20-25

Spontaneous 

potential, 

in millivolts

Gamma ray, 

in counts

250 npr Persecond <;prnnri 2000

16-inch resistivity, 64-inch resistivity, Lateral resistivity, 

in ohm-meters in ohm-meters in ohm-meters

Temperature, 

in degrees

Well 

construction

1000 1000

7

1QQ80 cohronhc.it Fahrenneit 100 li ithninm/ |Ltt1/'0gy Descriptions

Sandy gravel

Gravelly sand

Muddy sand

Weathered 

granite

Granite

Figure 31. Geophysical log, well-construction diagram, and stratigraphic column for borehole of monitoring site drilled in Irwin 

Basin at Fort Irwin National Training Center, California: PICNIC (14N/3E-33E2, -33E3).

Appendix A 47
LFMW7 (14N/3E-33J2)

Well

construction Lithology Descriptions

LFMW6 (14N/3E-34M2)

Well

construction Lithology___ Descriptions

UJ

O 

£ 

=5 50

CO 

Q

z

100

&

Gravelly muddy sand

Sand

Gravelly muddy sand

Gravelly muddy sand

Sandy gravel

Gravelly muddy sand

Schist

Granite

Figure 32. Well-construction diagram and stratigraphic 

column for borehole of monitoring site drilled in Irwin Basin at 

Fort Irwin National Training Center, California: LFMW7 (14N/ 

3E-33J2).

Figure 33. Well-construction diagram and stratigraphic 

column for borehole of monitoring site drilled in Irwin Basin at 

Fort Irwin National Training Center, California: LFMW6 (14N/ 

3E-34M2).

48 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
SAMPLES

CONTAINING

GRAVEL GRAVEL

(>2 mm)

Slightly gravelly 

mud

Trace 5 

V

Muddy 

sandy

gravel

Gravelly \ Gravelly

muddy \ S and Slightly gravelly 

sand \ \ , ysanyd y y

(Silt + Clay, g: -| 

<0.0625 mm)

f\ I M' I * ' J M ' ** «

sandy mud 

Sandymud

Slightly gravelly 

muddy sand

Trace

Muddy sand'

1:1 

MUD.-SAND RATIO

l : g (0.0625-2 mm)

SAMPLES

LACKING

GRAVEL

SAND

A

Sand

CLAY

2:1 1:2 

CLAY:SILT RATIO

SILT

Figure 34. Rock type nomenclature for stratigraphic columns (figs. 17-33) at Fort Irwin National Training Center, California.

Appendix A 49
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 1992-96

[State well No.: See Well-Numbering System in text. Site identification number is the latitude, longitude, and sequence number of the site. Measurement 

method (column M): R, reported; S, steel tape; and V, calibrated electric tape. Site status (column S): D, dry; O, obstruction; P, pumping; R, recently 

pumped; S, nearby pumping; and T, nearby recently pumped]

State well number 13N/3E-4B1

Local name SP1-240

Site identification number 351521116400201

Top of perforations 220

Bottom of perforations 240

Altitude 2390

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 240 feet, perforated

220-240 feet. One of three wells at this site. Altitude of land-surface datum 2,390 feet. Water-level records

available March 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

MAY 26, 1994 2286. V AUG 24, 1994 2287. V DEC 12, 1994 2287. V MAR 04, 1995 2287. V

JUL 21 2287. V SEP 22 2287. V 21 2287. V AUG 11 2288. V

LOWEST 2286. MAY 26, 1994

HIGHEST 2288. AUG 11, 1995

State well number 13N/3E-4B2

Local name SP1-180

Site identification number 351521116400202

Top of perforations 160

Bottom of perforations 180

Altitude 2390

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 180 feet. Perforated

160-180 feet. One of three wells at this site. Altitude of land-surface datum 2,390 feet. Water-level records

available March 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

MAY 26, 1994 2286. V AUG 24, 1994 2287. V DEC 12, 1994 2287. V MAR 04, 1995 2287. V

JUL 21 2287. V SEP 22 2287. V 21 2287. V AUG 11 2288. V

LOWEST 2286. MAY 26, 1994

HIGHEST 2288. AUG 11, 1995

State well number 13N/3E-4B3

Local name SP1-130

Site identification number 351521116400203

Top of perforations 110

Bottom of perforations 130

Altitude 2390

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 130 feet, perforated

110-130 feet. One of three wells at this site. Altitude of land-surface datum 2,390 feet. Water-level records

available March 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

MAY 26, 1994 2286. V AUG 24, 1994 2286. V DEC 12, 1994 2287. V MAR 04, 1995 2287. V

JUL 21 2286. V SEP 22 2286. V 21 2287. V AUG 11 2287. V

LOWEST 2286. MAY 26, 1994 JUL 21, 1994 AUG 24, 1994 SEP 22, 1994

HIGHEST 2287. DEC 12, 1994 DEC 21, 1994 MAR 04, 1995 AUG 11, 1995

State well number 13N/3E-4B4

Local name NIT3

Site identification number 351515116395201

Top of perforations 92

Bottom of perforations 97

Altitude 2380

On Ft. Irwin Army Base. Drilled observation well. Diameter 2 inches, depth 97 feet, perforated 92-97 feet.

Altitude of land-surface datum 2,380 feet. Water-level records available November 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL 

WATER 

DATE LEVEL MS

NOV 02, 1995 2300. V

50 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-AC1

Local name WC1-320

Site identification number 35151A116A01401

Top of perforations 300

Bottom of perforations 320

Altitude 2399.7A

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 320 feet, perforated

300-320 feet. One of three wells at this site. Altitude of land-surface datum 2,399.74 feet. Water-level records

available July 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JUL 28, 1993 2279.89 V

SEP 16 2278.02 S

FEE 15, 1994 2281.11 V

APR 03 2281.59 V

MAY 23, 1994 2281.94 V

JUL 21 2282.19 V

JUL 28, 2282.30 V

AUG 25 2282.13 V

SEP 22, 1994 2281.99 V

DEC 12 2282.10 V

DEC 28, 2281.67 V

MAR 08, 1995 2282.73 V

AUG 11, 1995 2282.78 V 

MAY 16, 1996 2283.92 V

LOWEST 2278.02 

HIGHEST 2283.92

SEP 16, 1993 

MAY 16, 1996

State well number 13N/3E-4C2

Local name WC1-220

Site identification number 351514116401402

Top of perforations 200

Bottom of perforations 220

Altitude 2399.74

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 220 feet, perforated

200-220 feet. One of three wells-this site. Altitude of land-surface datum 2,399.74 feet. Water-level records

available July 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JUL 28, 1993 2280.11 V

SEP 16 2280.24 S

FEE 15, 1994 2281.18 V

APR 03 2281.60 V

MAY 23, 1994 2281.97 V

JUL 21 2282.25 V

AUG 25 2282.23 V

SEP 22 2282.21 V

DEC 12, 1994 2282.29 V

28 2282.36 V

MAR 08, 1995 2282.81 V

AUG 11 2283.01 V

WATER 

DATE LEVEL MS

MAY 16, 1996 2284.22 V

LOWEST 2280.11 

HIGHEST 2284.22

JUL 28, 1993 

MAY 16, 1996

State well number 13N/3E-4C3

Local name WC1-150

Site identification number 351514116401403

Top of perforations 130

Bottom of perforations 150

Altitude 2399.74

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 150 feet, perforated

130-150 feet. One of three wells-this site. Altitude of land-surface datum 2,399.74 feet. Water-level records

available July 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JUL 28, 1993 2280.67 V

SEP 16 2280.56 S

FEE 15, 1994 2281.30 V

APR 03 2281.53 V

MAY 23, 1994 2281.97 V

JUL 21 2282.20 V

AUG 25 2282.34 V

SEP 22 2282.56 V

DEC 12, 1994 2282.65 V

28 2282.99 V

MAR 08, 1995 2282.97 V

AUG 11 2283.35 V

MAY 16, 1996 2284.51 V

LOWEST 2280.56 

HIGHEST 2284.51

SEP 16, 1993 

MAY 16, 1996

Appendix B 51
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-4D1

Local name WC2-320

Site identification number 351523116402801

Top of perforations 300

Bottom of perforations 320

Altitude 2419.85

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 320 feet, perforated

300-350 feet. On of three wells-this site. Altitude of land-surface datum 2,A19.85 feet. Water-levels records

available August 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

FEE 15, 1994 2276.21 V

APR 03 2276.88 V

MAY 24 2277.19 V

JUL 21, 1994 2277.32 V

AUG 24 2277.24 V

SEP 22 2276.81 V

DATE

DEC 13, 

28 

MAR 08,

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

1994 2276.43 V 

2276.22 V 

1995 2277.07 V

AUG 08, 1995 2276.29 V 

JUN 12, 1996 2278.53 V

LOWEST 2276.21 

HIGHEST 2278.53

FEB 15, 1994 

JUN 12, 1996

State well number 13N/3E-4D2

Local name WC2-250

Site identification number 351523116402802

Top of perforations 230

Bottom of perforations 250

Altitude 2419.85

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 250 feet, perforated

230-250 feet. One of three wells-this site. Altitude of land-surface 2,419.85 ft. Water-level records

available August 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

HATER 

LEVEL MS DATE

FEB 15, 1994 2276.66 V JUL 21, 

APR 03 2277.25 V AUG 24 

MAY 24 2277.57 V SEP 22

LOWEST 2276.66 

HIGHEST 2279.09

WATER 

LEVEL MS

1994 2277.81 V 

2277.76 V 

2277.49 V

FEB 15, 1994 

JUN 12, 1996

DATE

DEC 13,

28

MAR 08,

WATER 

LEVEL MS

1994 2277.60 V 

2276.99 V

1995 2277.58 V

DATE

WATER 

LEVEL MS

AUG 08, 1995 2276.90 V 

JUN 12, 1996 2279.09 V

State well number 13N/3E-4D3

Local name WC2-170

Site identification number 351523116402803

Top of perforations 150

Bottom of perforations 170

Altitude 2419.85

On Ft. Irwin Army Base. Drilled nested ovservation well. Diameter 2 inches, depth 170 feet. Perforated

150-170 feet. One of three wells-this site. Altitude of land-surface datum is 2,419.85 ft. Water-level

records available August 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

HATER 

LEVEL MS DATE

HATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 22, 1993 2276.67 ST

FEB 15, 1994 2277.05 V

APR 03 2277.45 V

MAY 24 2277.81 V

JUL 21, 1994 2278.10 V

28

AUG 24 

SEP 22 

LOWEST 2277.05 

HIGHEST 2279.53

2278.07 V 

2278.29 V 

2278.04 V 

FEB 15, 1994 

JUN 12, 1996

DEC 13, 1994 2278.10 V

28 2277.45 V

MAR 08, 1995 2277.95 V

AUG 08 2277.57 V

WATER 

DATE LEVEL MS

JUN 12, 1996 2279.53 V

State well number 13N/3E-4G1

Local name STP-1

Site identification number 351504116400301

Top of perforations 90

Bottom of perforations 140

Altitude 2385.63

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

HATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 02, 1992 2282.54 V

SEP 14, 1993 2284.17 V

23 2284.29 S

FEB 04, 1994 2284.87 V

15 2284.99 V

APR 01 2285.25 V

JUL 21, 1994 2286.15 V

SEP 08 2286.11 V

DEC 06 2286.31 V

FEB 07, 1995 2286.42 V 

AUG 08 2287.85 V

LOWEST 2282.54 

HIGHEST 2287.85

DEC 02, 1992 

AUG 08, 1995

52 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-4K1

Local name STP-4

Site identification number 351456116395001

Top of perforations 65

Bottom of perforations 85

Altitude 2375.28 ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

DEC 02. 1992 2300.85 V FEE 15. 1994 2307.14 V JUL 21, 1994 2308.92 V NOV 16, 1994 2307.74 V 

SEP 14, 1993 2305.61 V APR 03 2307.89 V SEP 08 2308.75 V DEC 06 2307.64 V

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

FEB 03, 1995 2308.45 V AUG 08, 1995 2311.01 V

LOWEST 2300.85 DEC 02, 1992 

HIGHEST 2311.01 AUG 08, 1995

State well number 13N/3E-4K2

Local name NIT2-238

Site identification number 351449116400501

Top of perforations 228

Bottom of perforations 238

Altitude 2385

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 238 feet, perforated

228-238 feet. One of three wells-this site. Altitude of land-surface datum 2,385 feet. Water-level records

available from November 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

NOV 30, 1994 2290. V FEB 23, 1995 2292. V AUG 10, 1995 2293. V JUN 11, 1996 2293. V

LOWEST 2290. NOV 30, 1994 

HIGHEST 2293. AUG 10, 1995 JUN 11, 1996

State well number 13N/3E-4K3

Local name NIT2-190

Site identification number 351449116400502

Top of perforations 170

Bottom of perforations 190

Altitude 2385

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 190 feet, perforated

170-190 feet. One of three wells-this site. Altitude of land-surface datum 2,385 feet. Watr-level records

available from November 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

NOV 30, 1994 2291. V FEB 23, 1995 2292. V AUG 10, 1995 2293. V JUN 11, 1996 2293. V

LOWEST 2291. NOV 30, 1994

HIGHEST 2293. AUG 10, 1995 JUN 11, 1996

State well number 13N/3E-4K4

Local name NIT2-135

Site identification number 351449116400503

Top of perforations 115

Bottom of perforations 135

Altitude 2385

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 135 feet, perforated

115-135 feet. One of three wells-this site. Altitude of land-surface datum 2,385 feet. Water-level records

available from November 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

NOV 30, 1994 2290. V FEB 23, 1995 2291. V AUG 10, 1995 2292. V JUN 11, 1996 2292. V

LOWEST 2290. NOV 30, 1994

HIGHEST 2292. AUG 10, 1995 JUN 11, 1996

Appendix B 53
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-4M1

Local name IT-1

Site identification number 351450116402301

Top of perforations 141

Bottom of perforations 341

Altitude 2410

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

FEB 02, 1993 2283. 

SEP 23 2284.

VR 

VR

FEB 15, 1994 2284. 

JUL 22 2286.

SR 

V

DATE 

NOV 21, 1994 2284.

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

LOWEST 2283. 

HIGHEST 2286.

FEB 02, 1993 

JUL 22, 1994

State well number 13N/3E-4Q1

Local name IX-3

Site identification number 351433116400501

Top of perforations 90

Bottom of perforations 290

Altitude 2385

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 01, 1992 2290.

JAN 25, 1993 2291.

SEP 23 2295.

FEB 15, 1994 2295.

APR 01 

JUL 22

2296.

2296.

SEP 07, 1994 2296. V

NOV 21 2296. V

MAR 08, 1995 2297. V

DATE 

AU6 03, 1995 2298.

WATER 

LEVEL MS

LOWEST 2290. 

HIGHEST 2298.

DEC 01, 1992 

AUG 03, 1995

State well number 13N/3E-4Q2

Local name NIT1

Site identification number 351441116400401

Top of perforations 85

Bottom of perforations 90

Altitude 2385

On Ft. Irwin Army Base. Drilled observation well. Diameter 2 inches, depth 90 feet, perforated 85-90 feet.

Altitude of land-surface datum 2,385 feet. Water-level records available November 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE 

NOV 02, 1994 2309.

WATER 

LEVEL MS DATE 

NOV 28, 1995 2318.

WATER 

LEVEL MS DATE 

MAY 15, 1996 2311.

WATER 

LEVEL MS DATE 

MAY 17, 1996 2311.

WATER 

LEVEL MS

LOWEST 2309. 

HIGHEST 2318.

NOV 02, 1994 

NOV 28, 1995

State well number 13N/3E-5D1

Local name 1-1

Site identification number 351524116412901

Top of perforations 235

Bottom of perforations 

Altitude 2521.27

500

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

FEB 02, 1993 2271.25 V 

SEP 23 2271.87 V

FEB 16, 1994 2272.11 V 

APR 01 2272.30 VS

NOV 21, 1994 2270.77 V 

MAR 08, 1995 2270.82 V

WATER 

DATE LEVEL MS

AUG 04, 1995 2269.42 S

LOWEST 2269.42 AUG 04, 1995 

HIGHEST 2272.307 APR 01, 1994

54 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-5G1 

Local name TH-5

Site identification number 351505116405701 

Top of perforations 210 

380

Bottom of perforations 350

440 

Altitude 2460

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JAN 25, 1993 2271.

JUL 13 2271.

28 2271.

SEP 14, 1993 2271. V

FEE 15, 1994 2272. V

APR 01 2270. V

JUL 22, 1994 2272. V

SEP 07 2273. V

NOV 21 2272. V

MAR 08, 1995 2272. V 

AUG 08 2272. V

LOWEST 2270. 

HIGHEST 2273.

APR 01, 1994 

SEP 07, 1994

State well number 13N/3E-5G2

Local name 1-9

Site identification number 351504116405501

Top of perforations 210

Bottom of perforations 440

Altitude 2460

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 01, 1992 2271. V

SEP 14, 1993 2272. V

FEE 15, 1994 2273. V

MAR 31, 1994 2273. V

JUL 22 2278. V

SEP 07 2272. V

NOV 21, 1994 2273. V

MAR 08, 1995 2273. V

AUG 08 2273. V

WATER 

DATE LEVEL MS

SEP 18, 1996 2273. V

LOWEST 2271. 

HIGHEST 2278.

DEC 01, 1992 

JUL 22, 1994

State well number 13N/3E-6P1

Local name TH-1

Site identification number 351440116422301

Top of perforations

Bottom of perforations

Altitude 2700

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE 

DEC 01, 1992

WATER 

LEVEL MS

VD

DATE 

SEP 23, 1993

WATER 

LEVEL MS

VD

LOWEST 

HIGHEST

State well number 13N/3E-8B1

Local name AD1-255

Site identification number 351418116410201

Top of perforations 235

Bottom of perforations 255

Altitude 2500

On Ft. Irwin Army Base. Drilled observation well. Diameter 2 inches, depth 255 feet, perforated 235-255 feet.

Altitude of land-surface datum 2,500 feet. Water-level records available March 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JUL 20, 1994 2271. 

22 2276.

JUL 27, 1994 2274. 

28 2276.

SEP 07, 1994 2276. 

NOV 21 2276.

MAR 08, 1995 2276. 

AUG 08 2276.

LOWEST 2271. 

HIGHEST 2276.

JUL 20, 1994

JUL 22, 1994 JUL 28, 1994 SEP 07, 1994 NOV 21, 1994 MAR 08, 1995 AUG 08, 1995

Appendix B 55
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-9B1

Local name STP-5

Site identification number 351429116395401

Top of perforations 70

Bottom of perforations 120

Altitude 2378.27

DATE

WATER 

LEVEL MS

ALTITUDE, IN FEET ABOVE SEA LEVEL 

DATE

WATER 

DATE LEVEL MS

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 01. 1992 2295.50 V

SEP 23, 1993 2301.69 V

FEB 15, 1994 2304.29 V

APR 01, 1994 2305.02 V

JUL 22 2306.50 V

SEP 07 2305.96 V

NOV 16, 1994 2306.26 S

FEB 07, 1995 2306.61 V

AUG 03 2309.05 V

LOWEST 2295.50 

HIGHEST 2309.05

DEC 01, 1992 

AUG 03, 1995

State well number 13N/3E-10D1

Local name STP-6

Site identification number 351422116392501

Top of perforations 15

Bottom of perforations 65

Altitude 2344.85

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS

DEC 02, 1992 2317.05 V

SEP 23, 1993 2318.10 V

FEB 15, 1994 2316.64 V

DATE

APR 01, 

JUL 22 

SEP 08

LOWEST 2316.25 

HIGHEST 2321.60

WATER 

LEVEL MS

1994 2316.99 V 

2316.86 V 

2316.81 V

NOV 15, 1994 

AUG 03, 1995

DATE

WATER 

LEVEL MS

NOV 15, 1994 2316.25 V

FEB 24, 1995 2320.15 V

AUG 03 2321.60 V

WATER 

DATE LEVEL MS

MAY 15, 1996 2319.5 R

State well number 13N/3E-10E1

Local name WC3-243

Site identification number 351416116392201

Top of perforations 223

Bottom of perforations 243

Altitude 2342.65

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 243 feet, perforated

223-243 feet. One of three wells-this site. Altitude of land-surface 2,350 feet. Water-level records

available August 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS

SEP 22, 1993 2307.95 S

FEB 15, 1994 2307.76 V

APR 01 2307.83 V

DATE

MAY 25, 

JUL 22 

AUG 25

1994

WATER 

LEVEL MS

2307.91 V 

2308.04 V 

2308.04 V

DATE

SEP 07, 

DEC 13 

28

WATER 

LEVEL MS

1994 2308.35 V 

2308.06 V 

2308.08 V

DATE

WATER 

LEVEL MS

MAR 08, 1995 2308.70 V

AUG 10 2314.73 V

JUN 13, 1996 2310.94 V

LOWEST 2307.76 

HIGHEST 2314.73

FEB 15, 1994 

AUG 10, 1995

State well number 13N/3E-10E2

Local name WC3-170

Site identification number 351416116392202

Top of perforations 150

Bottom of perforations 170

Altitude 2342.65

On Ft. Irwin Army base. Drilled nested observation well. Diameter 2 inches, depth 170 feet, perforated

150-170 feet. One of three wells-this site. Altitude of land-surface datum 2,350 feet. Water-level records

available August 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 23, 1993 2310.90 S 

FEB 15, 1994 2310.41 V 

APR 01 2310.39 V

LOWEST 2310.30 

HIGHEST 2312.83

MAY 25, 1994 2310.44 V 

JUL 22 2310.43 V 

AUG 25 2310.39 V 

DEC 28, 1994 

AUG 10, 1995

DATE

SEP 07, 

DEC 13 

28

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

1994 2310.57 V 

2310.32 V 

2310.30 V

MAR 08, 1995 2311.39 V

AUG 10 2312.83 V

JUN 13, 1996 2312.77 V

56 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 13N/3E-10E3

Local name WC3-60

Site identification number 351416116392203

Top of perforations 40

Bottom of perforations 60

Altitude 2342.65

On Ft. Irwin Army base. Drilled nested observation well. Diameter 2 inches, depth 60 feet, perforated 40-60 feet.

One of three wells-this site. Altitude of land-surface datum 2,350 feet. Water-level records available

August 1993 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 23, 1993 2313.75 S

FEB 15, 1994 2312.55 V

APR 01 2312.39 V

MAY 25, 1994 2312.44 V

JUL 22 2312.25 V

AUG 25 2312.19 V

SEP 07, 1994 2312.50 V

DEC 13 2312.04 V

28 2311.98 V

MAR 08, 1995 2313.39 V

AUG 10 2314.73 V

JUN 13, 1996 2314.20 V

LOWEST 2311.98 

HIGHEST 2314.73

DEC 28, 1994 

AUG 10, 1995

State well number 14N/3E-31K1

Local name TH-3

Site identification number 351542116420601

Top of perforations 260

Bottom of perforations 405

Altitude 2610

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 01, 1992 2274. 

SEP 23, 1993 2274.

FEB 15, 1994 2275. 

APR 03 2275.

MAY 23, 1994 2275. 

AUG 15 2274.

SEP 07, 1994 2274. 

DEC 12

LOWEST 2274. 

HIGHEST 2275.

DEC 01, 1992 SEP 23, 1993 AUG 15, 1994 SEP 07, 1994 

FEB 15, 1994 APR 03, 1994 MAY 23, 1994

State well number 14N/3E-32B1

Local name NH1-630

Site identification number 351616116410701

Top of perforations 610

Bottom of perforations 630

Altitude 2530

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 630 feet, perforated

610-630 feet. One of three wells drilled-this site. Altitude of land-surface datum 2,530 feet. Water-level

records available March 1993 to current year.

DATE

WATER 

LEVEL MS

ALTITUDE, IN FEET ABOVE SEA LEVEL 

DATE

WATER 

DATE LEVEL MS

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAY 

SEP

20, 

21 

14 

22

1993 2265. 

2265. 

2265. 

2264.

5 

5 

5 

9

V 

V 

V 

V 

LOWEST 

HIGHEST

FEB 

APR 

MAY 

JUL 

2264 

2267

15, 

01 

23 

19 

.9 

.6

1994

SEP 

APR

2267 

2267 

2267 

2267 

22, 

01,

.2 V 

.6 V 

.6 V 

.5 V 

1993 

1994

DEC 

MAY

SEP 08, 

14 

22 

DEC 08 

08, 1994 

23, 1994

2265.5

2266.1

2264.9

DEC 20, 1994 2266.2 

MAY 21, 1996 2267.0

State well number 14N/3E-32B2

Local name NH1-540

Site identification number 351616116410702

Top of perforations 520

Bottom of perforations 540

Altitude 2530

On Fort Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 540 feet, perforated

520-540 feet. One of three wells drilled-this site. Altitude of land-surface datum 2,530 feet. Water-level

records available March 1993 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAY 20, 1993 2265.8 V FEB 15, 1994 2267.3 V

JUN 02 2265.6 V APR 01 2267.6 V

SEP 14 2265.7 V MAY 23 2267.7 V

22 2265.1 V JUL 19 2267.1 V

LOWEST 2265.1 SEP 22, 1993

HIGHEST 2270.3 DEC 08, 1994

SEP 08, 1994 2267.3 V

14 2265.9 V

22 2266.3 V

DEC 08 2270.3 V

WATER 

DATE LEVEL MS

MAY 21, 1996 2267.1 V

Appendix B 57
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-32B3

Local name NH1-300

Site identification number 351616116410703

Top of perforations 280

Bottom of perforations 300

Altitude 2530

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 300 feet, perforated

280-300 feet. One of three wells drilled-this site. Altitude of land-surface datum 2,530 feet. Water-level

records available March 1993 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAY 20, 1993 2266.2 V

JUN 02 2266.0 V

SEP 14 2266.1 V

23 2265.8 V

FEB 15, 1994 2267.3 V

APR 01 2267.7 V

MAY 23 2267.7 V

JUL 19 2267.5 V

JUL 20, 1994 2267.5 S

SEP 08 2267.4 V

14 2266.8 V

22 2266.9 V

DEC 08, 1994 2266.3 

MAY 21, 1996 2267.4

LOWEST 2265.8 

HIGHEST 2267.7

SEP 23, 1993

APR 01, 1994 MAY 23, 1994

State well number 14N/3E-32F1

Local name I-3A

Site identification number 351553116411001

Top of perforations 300

360

380

Bottom of perforations 360

380 

494 

Altitude 2500

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JAN 27, 1993 2265. 

FEB 16, 1994 2267.

VR 

S

APR 01, 1994 2266. 

AU6 15

DATE

SEP 07, 

DEC 20

1994

WATER 

LEVEL MS

P 

P

DATE

MAR 08, 1995 

AU6 10

WATER 

LEVEL MS

LOWEST 2265. 

HIGHEST 2267.

JAN 27, 1993 

FEB 16, 1994

State well number 14N/3E-32F2

Local name BASEBALL-460

Site identification number 351558116412101

Top of perforations 440

Bottom of perforations 460

Altitude 2530

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 460 feet, perforated

440-460 feet. One of two wells-this site. Altitude of land-surface datum 2,530 feet. Watr-level records

available November 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

NOV 30, 1994 2277. V FEB 22, 1995 2277. V SEP 18, 1996 2277. V

LOWEST 2277. NOV 30, 1994 FEB 22, 1995 SEP 18, 1996

HIGHEST 2277. NOV 30, 1994 FEB 22, 1995 SEP 18, 1996

State well number 14N/3E-32F3

Local name BASEBALL-290

Site identification number 351558116412102

Top of perforations 270

Bottom of perforations 290

Altitude 2530

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches,

270-290 feet. One of two wells-this site. Altitude of land-surface datum 2,

available November 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

depth 290 feet, perforated 

530 feet. Water-level records

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

NOV 30, 1994 2276. V FEB 22, 1995 2277. V

LOWEST 2276. NOV 30, 1994

HIGHEST 2277. FEB 22, 1995 SEP 18,

SEP 18, 1996 2277.

1996

58 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-32H1

Local name 1-7

Site identification number 351556116404601

Top of perforations 220

Bottom of perforations 

Altitude 2461.33

475

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JAN 27, 1993 2267.39 V 

FEB 16, 1994 2270.20 S

AUG 15, 1994 2270.74 V 

SEP 08 F

DEC 20, 1994 F 

MAR 08, 1995 2269.54 S

WATER 

DATE LEVEL MS

AUG 10, 1995 2263.37 S

LOWEST 2263.37 AUG 10, 1995 

HIGHEST 2270.74 AUG 15, 1994

State well number 14N/3E-32J1 

Local name 1-6

Site identification number 351547116405001 

Top of perforations 200.00 

340.00

Bottom of perforations 310.00

536.00

Altitude 2468.41

On Camp Irwin. Drilled public supply water-table well. Diameter 14 inches, depth 550 feet, perforated 200-310, 

340-536 feet. Altitude of land-surface datum 2468.41 feet. Records available 1945, 1955, 1978-80, 1982.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER 

DATE LEVEL MS

JAN 27, 1993 2267.39 VR

WATER 

DATE LEVEL MS

FEB 16, 1994 2269.64 S

WATER 

DATE LEVEL MS

AFR 01, 1994 2269.28 V

WATER 

DATE LEVEL MS

DEC 20, 1994 2264.96 S

LOWEST 2264.96 

HIGHEST 2269.64

DEC 20, 1994 

FEB 16, 1994

State well number 14N/3E-32K1 

Local name I-5A

Site identification number 351538116410301 

Top of perforations 320

375

Bottom of perforations 340

535 

Altitude 2483.76

DATE

WATER 

LEVEL MS

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER 

DATE LEVEL MS DATE

WATER 

LEVEL MS

JAN 27, 1993 2269.45 S 

FEB 16, 1994 2270.80 S

APR 01, 1994 2265.70 V 

AUG 15 2263.16 V

DEC 20, 1994 F 

MAR 08, 1995 2268.88 V

DATE 

AUG 10, 1995

WATER 

LEVEL MS

LOWEST 2263.16 

HIGHEST 2270.80

AUG 15, 

FEB 16,

1994

1994

State well number 14N/3E-32K3

Local name FI1-440

Site identification number 351539116405603

Top of perforations 420

Bottom of perforations 440

Altitude 2472.43

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 440 feet, perforated

420-440 feet. One of four wells-this site. Altitude of land-surface datum 2,472.43 feet. Water-level records

available March 1993 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAR 10, 1993 2269.01 V

MAY 04 2268.64 V

26 2266.43 V

SEF 14 2267.56 V

FEB 03, 1994 2269.79 V

16 2269.97 V

AFR 01 2268.81 V

MAY 17 2267.58 V

JUL 22, 1994 2268.68 V

AUG 23 2266.54 V

SEF 22 2267.18 V

DEC 13 2266.53 V

DEC 22, 1994 2265.13 V

MAR 08, 1995 2269.26 V

AUG 07 2268.33 V

LOWEST 2265.13 

HIGHEST 2269.97

DEC 22, 1994 

FEB 16, 1994

Appendix B 59
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-32K4

Local name FI1-355

Site identification number 351539116405604

Top of perforations 335

Bottom of perforations 355

Altitude 2472.43

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 355 feet, perforated

335-355 feet. One of four wells-this site. Altitude of land-surface datum 2,472.43 feet. Water-level records

available March 1993 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAR 10. 1993 2268.95 V

MAY 04 2268.49 V

26 2266.69 V

SEP 15 2266.92 V

FEB 03, 1994 2270.04 V

16 2270.04 V

APR 01 2269.41 V

MAY 17 2267.83 V

JUL 22, 1994 2268.68 V

AUG 23 2266.66 V

SEP 22 2267.29 V

DEC 13 2266.94 V

DATE

WATER 

LEVEL MS

DEC 22, 1994 2265.34 V

MAR 08, 1995 2269.22 V

AUG 07 2268.38 V

LOWEST 2265.34 DEC 22, 1994 

HIGHEST 2270.04 FEB 03, 1994 FEB 16, 1994

State well number 14N/3E-32K5

Local name FI1-290

Site identification number 351539116405605

Top of perforations 270

Bottom of perforations 290

Altitude 2472.43

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 290 feet, perforated

270-290 feet. One of four wells-this site. Altitude of land-surface datum 2,472.43 feet. Water-level records

available March 1993 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAR 10, 1993 2269.33 V

MAY 04 2268.76 V

05 2266.78 VT

26 2267.71 V

SEP 15. 1993 2267.91 V

FEB 03. 1994 2270.01 V

16 2270.04 V

APR 01 2269.60 VT

MAY 17, 1994 2267.80 V

JUL 22 2268.78 V

AUG 23 2266.69 V

SEP 22 2267.57 V

DEC 13, 1994 2268.31 V

22 2265.56 V

MAR 08, 1995 2268.88 V

AUG 07 2268.51 V

LOWEST 2265.56 

HIGHEST 2270.04

DEC 22, 1994 

FEB 16, 1994

State well number 14N/3E-32K6

Local name FI1-230

Site identification number 351539116405606

Top of perforations 210

Bottom of perforations 230

Altitude 2472.43

On Ft. Irwin Army Base. Drilled nested observation well. Diameter inches, depth 230 feet, perforated

210-230 feet. One of four wells-this site. Altitude of land-surface datum 2,472.43 feet. Water-level records

available March 1993 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAR 10, 1993 2269.33 V

MAY 04 2268.71 V

05 2267.66 VT

26 2267.35 V

SEP 15, 1993 2267.67 V

FEB 03, 1994 2269.88 V

16 2269.91 V

APR 01 2269.29 VT

MAY 17, 1994 2268.33 V

JUL 22 2268.46 V

AUG 23 2267.23 V

SEP 22 2267.14 V

DEC 13, 1994 2266.93 V

22 2266.06 V

MAR 08, 1995 2269.06 V

AUG 07 2268.35 V

LOWEST 2266.06 

HIGHEST 2269.91

DEC 22, 1994 

FEB 16, 1994

60 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-32M1

Local name I-2A

Site identification number 351543116413401

Top of perforations 290

Bottom of perforations 560

Altitude 2550

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

FEB 02, 1993 2280. VR APR 01, 1994 VP MAR 08, 1995 2267. S 

FEB 16, 1994 2281. SR DEC 20 P AUG 10 2267. S

LOWEST 2267. MAR 08, 1995 AUG 10, 1995 

HIGHEST 2281. FEB 16, 1994

State well number 14N/3E-32N1

Local name SOC2-520

Site identification number 351525116413001

Top of perforations 500

Bottom of perforations 520

Altitude 2523

On Ft. Irwin Training Center. Drilled nested observation well. Diameter 2 inches, depth 540 feet. Perforated

500-520 feet. One of three wells-this site. Altitude of land-surface datum, 2,523 feet. Water-level

records available May 1995 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

MAY 16, 1995 2260. V AUG 11, 1995 2273. V MAY 14, 1996 2272. V 

JUN 06 2272. V NOV 29 2272. V

LOWEST 2260. MAY 16, 1995 

HIGHEST 2273. AUG 11, 1995

State well number 14N/3E-32N2

Local name SOC2-410

Site identification number 351525116413002

Top of perforations 390

Bottom of perforations 410

Altitude 2523

On Ft. Irwin Training Center. Drilled nested observation well. Diameter 2 inches, depth 540 feet. Perforated

390-410 feet. One of three wells-this site. Altitude of land-surface datum 2,523 feet. Water-level records

available May 1995 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

MAY 19, 1995 2273. V AUG 11, 1995 2274. V MAY 14, 1996 2272. V 

JUN 06 2272. V NOV 29 2272. V

LOWEST 2272. JUN 06, 1995 NOV 29, 1995 MAY 14, 1996 

HIGHEST 2274. AUG 11. 1995

State well number 14N/3E-32N3

Local name SOC2-270

Site identification number 351525116413003

Top of perforations 250

Bottom of perforations 270

Altitude 2523

On Ft. Irwin Training Center. Drilled nested observation well. Diameter 2 inches, depth 540 feet, perforated

250-270 feet. One of 3 wells-this site. Altitude of land-surface datum,2,523 feet. Water-level records

available May 1995 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

MAY 16, 1995 2287. V JUN 06, 1995 2274. V NOV 29, 1995 2274. V MAY 22, 1996 2274. V 

17 2287. V JUL 11 2273. V MAY 14, 1996 2274. V

LOWEST 2273. JUL 11, 1995 

HIGHEST 2287. MAY 16, 1995 MAY 17, 1995

Appendix B 61
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-32F2 

Local name SOC1-904

Site identification number 351527116412501 

Top of perforations 894

850

Bottom of perforations 904

870

Altitude 2517

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 905 feet, perforated 

894 to 904 feet. One of five wells-this site. Altitude of land-surface datum 2,517 feet. Water-level records 

available June 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

JUL 20, 1994 2274. V SEP 14, 1994 2277. V MAR 08, 1995 2277. V AUG 03, 1995 2277. S 

SEP 07 2277. V DEC 12 2277. V MAY 01 2277. V SEP 18, 1996 2277. V

LOWEST 2274. JUL 20, 1994

HIGHEST 2277. SEP 07, 1994 SEP 14, 1994 DEC 12, 1994 MAR 08, 1995 MAY 01, 1995 AUG 03, 1995

SEP 18, 1996

State well number 14N/3E-32F3

Local name SOC1-730

Site identification number 351527116412502

Top of perforations 710

Bottom of perforations 730

Altitude 2517

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 730 feet, perforated

710-730 feet. One of five wells-this site. Altitude of land-surface datum 2,517 feet. Water-level records

available June 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

JUL 20, 1994 2271. V SEP 14, 1994 2276. V MAR 08, 1995 2277. V AUG 03, 1995 2277. S 

SEP 07 2276. V DEC 12 2276. V MAY 01 2277. V SEP 18, 1996 2277. V

LOWEST 2271. JUL 20, 1994 

HIGHEST 2277. MAR 08, 1995 MAY 01, 1995 AUG 03, 1995 SEP 18, 1996

State well number 14N/3E-32F4

Local name SOC1-580

Site identification number 351527116412503

Top of perforations 560

Bottom of perforations 580

Altitude 2517

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 580 feet, perforated

560-580 feet. One of five wells-this site. Altitude of land-surface datum 2,517 feet. Water-level records

available June 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

JUL 20, 1994 2276. V SEP 14, 1994 2274. V MAR 08, 1995 2276. V AUG 03, 1995 2276. S 

SEP 07 2274. V DEC 12 2275. V MAY 01 2275. V SEP 18, 1996 2276. V

LOWEST 2274. SEP 07, 1994 SEP 14, 1994 

HIGHEST 2276. JUL 20, 1994 MAR 08, 1995 AUG 03, 1995 SEP 18, 1996

62 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-32P5

Local name SOC1-405

Site identification number 351527116412504

Top of perforations 385

Bottom of perforations 405

Altitude 2517

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 405 feet. Perforated

385-405 feet. One of five wells-this site. Altitude of land-surface datum 2,517 feet. Water-level records

available June 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

JUL 20, 1994 2276. V SEP 14, 1994 2275. V MAR 08, 1995 2276. V AUG 04, 1995 2276. S 

SEP 07 2276. V DEC 12 2275. V MAY 01 2276. V SEP 18, 1996 2276. V

LOWEST 2275. SEP 14, 1994 DEC 12, 1994 

HIGHEST 2276. JUL 20, 1994 SEP 07, 1994 MAR 08, 1995 MAY 01, 1995 AUG 04, 1995 SEP 18, 1996

State well number 14N/3E-32P6

Local name SOC1-270

Site identification number 351527116412505

Top of perforations 250

Bottom of perforations 270

Altitude 2517

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 270 feet, perforated

250-270 feet. One of five wells-this site. Altitude of land-surface datum 2,517 feet. Water-level records

available June 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

JUL 20, 1994 2277. V SEP 07, 1994 2277. V DEC 12, 1994 2277. V AUG 04, 1995 2278. S

26 2277. V 14 2276. V MAR 08, 1995 2278. V SEP 18, 1996 2283. V

27 2277. V 20 2276. V MAY 01 2278. V

LOWEST 2276. SEP 14, 1994 SEP 20, 1994 

HIGHEST 2283. SEP 18, 1996

State well number 14N/3E-32Q1

Local name 1-4

Site identification number 351539116405601

Top of perforations 185

Bottom of perforations 392

Altitude 2471.30

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

FEB 02, 1993 2266.52 S FEE 03, 1994 2269.77 S AUG 15, 1994 2267.65 S AUG 10, 1995 2268.13 S 

SEP 23 2268.46 V 16 2269.86 S MAR 08, 1995 2269.08 S

LOWEST 2266.52 FEB 02, 1993 

HIGHEST 2269.86 FEB 16, 1994

State well number 14N/3E-32Q3

Local name 1-8

Site identification number 351525116411301

Top of perforations

Bottom of perforations

Altitude 2495

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS

DEC 03, 1992 2258.91 VS AUG 08, 1995 2259.58 V SEP 18, 1996 2259.69 V

LOWEST 2258.91 DEC 03, 1992 

HIGHEST 2259.69 SEP 18, 1996

Appendix B 63
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-33A1

Local name BC1

Site identification number 351614116394401

Top of perforations 145

Bottom of perforations 185

Altitude 2420

On Ft. Irwin Army Base. Drilled observation well. Diameter 2 inches, depth 185 feet, perforated 145-185 feet.

Altitude of land-surface datum 2,420 feet above sea level. Water-level records available March 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

JUL 18, 1994 2274. V MOV 08, 1994 2274. V MAR 08, 

19 2274. V DEC 13 2274. V MAY 02 

SEP 07 2274. V JAN 31, 1995 2274. V JUL 31 

LOWEST 2274. JUL 18, 1994 JUL 19, 1994 

MAR 08, 1995 MAY 02, 1995 

HIGHEST 2274. JUL 18, 1994 JUL 19, 1994

MAR 08, 1995 MAY 02 

State well number 14N/3E-33E2 

Local name PICNIC-220

Site identification number 351556116402401 

Top of perforations 200 

Bottom of perforations 220 

Altitude 2425 

On Ft. Irwin Army Base. Drilled nested observation well.

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

1995

1995 2274. V

2274. V

2274. V

SEP 07, 1994 NOV 08, 1994 

JUL 31, 1995 SEP 18, 1996 

SEP 07, 1994 NOV 08, 1994 

JUL 31, 1995 SEP 18, 1996

SEP 18, 1996 2274.

DEC 13, 1994 

DEC 13, 1994

JAN 31, 1995 

JAN 31, 1995

Diameter 2 inches

200-220 feet. One of two wells-this site, 

available March 1994 to current year.

Altitude of land-surface datum 2

ALTITUDE, IN FEET ABOVE SEA LEVEL

depth 220 feet, perforated 

425 feet. Water-level records

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 07, 1994 2276. 

21 2276.

V DEC 13, 

V AUG 08, 

LOWEST 2275. 

HIGHEST 2276.

1994 2276. V NOV 09, 1995 2275. V

1995 2275. V SEP 18, 1996 2276. V 

AUG 08, 1995 NOV 09, 1995 

SEP 07, 1994 SEP 21, 1994 DEC 13, 1994 SEP 18, 1996

State well number 14N/3E-33E3

Local name PICNIC-175

Site identification number 351556116402402

Top of perforations 155

Bottom of perforations 175

Altitude 2425

On Ft. Irwin Army Base. Drilled nested observation well. Diameter 2 inches, depth 175 feet, perforated

155-175 feet. One of two wells-this site. Altitude of land-surface datum 2,425 feet. Water-level records

available March 1994 to present.

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER WATER WATER 

DATE LEVEL MS DATE LEVEL MS DATE LEVEL MS DATE

WATER 

LEVEL MS

SEP 07, 1994 2276. 

21 2276.

V DEC 13, 1994 2276. V NOV 09, 1995 2275. V

V AUG 08, 1995 2275. V 30 2275. V

LOWEST 2275. AUG 08, 1995 NOV 09, 1995 NOV 30, 1995

HIGHEST 2276. SEP 07, 1994 SEP 21, 1994 DEC 13, 1994

SEP 18, 1996 2276.

SEP 18, 1996

State well number 14N/3E-33F1

Local name IX-1

Site identification number 351602116401101

Top of perforations 179

Bottom of perforations 259

Altitude 2416.28

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 03, 1992 2274.65 V 

SEP 23, 1993 2276.76 V

FEB 01, 1994 2276.31 V 

15 2276.35 V

MAR 30, 1994 2276.62 V 

MAY 19 2276.84 V

AUG 15, 1994 2277.48 V 

SEP 07 2273.62 V

DATE

WATER 

LEVEL MS

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER 

DATE LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

MAR 10, 1995 2277.21 V AUG 08, 1995 2277.42 V

LOWEST 2273.62 SEP 07, 1994 

HIGHEST 2278.47 SEP 18, 1996

SEP 18, 1996 2278.47 V

64 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-33H1

Local name MW2

Site identification number 351603116393801

Top of perforations

Bottom of perforations

Altitude 2411.59

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 14, 1993 2289.07 V

FEE 01, 1994 2287.42 V

15 2287.44 V

MAR 30, 1994 2287.53 V

JUN 07 2287.67 V

JUL 22 2288.64 V

SEP 08, 1994 2287.82 V

NOV 10 2287.64 V

FEB 02, 1995 2287.96 V

LOWEST 2287.42 

HIGHEST 2289.07

FEB 01, 1994 

SEP 14, 1993

State well number 14N/3E-33H2

Local name MW3

Site identification number 351559116393701

Top of perforations 138

Bottom of perforations 188

Altitude 2404.34

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 14, 1993 2287.07 VR

23 2293.09 V

FEB 16, 1994 2287.45 V

MAR 30, 1994 2287.52 V

JUN 07 2287.67 V

JUL 22 2287.67 V

SEP 08, 1994 2287.68 V

NOV 14 2287.69 S

FEB 01, 1995 2287.90 V

LOWEST 2287.07 

HIGHEST 2293.09

SEP 14, 1993 

SEP 23, 1993

State well number 14N/3E-33J1

Local name MW5

Site identification number 351549116393801

Top of perforations

Bottom of perforations

Altitude 2389.21

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

SEP 14, 1993 2299.37 V

FEB 16, 1994 2299.83 V

MAR 30 2299.92 V

JUN 07, 1994 2300.86 V

SEP 08 2300.13 V

NOV 14 2301.01 V

DEC 05, 1994 2300.71 V

FEB 02, 1995 2300.82 V

MAY 02 2302.07 V

LOWEST 2299.37 

HIGHEST 2303.63

SEP 14, 1993 

SEP 18, 1996

DATE

WATER 

LEVEL MS

MAY 04, 1995 2288.06 V

AUG 06 2288.12 V

SEP 18, 1996 2288.85 V

DATE

WATER 

LEVEL MS

MAY 03, 1995 2288.13 V 

AUG 01 2288.22 V

DATE

WATER 

LEVEL MS

AUG 02, 1995 2301.48 V 

SEF 18, 1996 2303.63 V

State well number 14N/3E-33J2

Local name LFMW7

Site identification number 351542116393702

Top of perforations 76

Bottom of perforations 116

Altitude 2390

On Ft. Irwin Army Base. Drilled observation well. Diameter 5 inches, depth 116 feet, perforated 76-116 feet.

Altitude of land-surface datum 2,390 feet. Water-level records available June 1994 to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

JUN 07, 1994 2305. 

JUL 19 2305.

SEP 08, 1994 2305. 

NOV 09 2305.

FEB 01, 1995 2305. 

MAY 03 2306.

DATE 

AUG 01, 1995 2306.

WATER 

LEVEL MS

LOWEST 2305. 

HIGHEST 2306.

JUN 07, 1994 JUL 19, 1994 SEP 08, 1994 NOV 09, 1994 FEB 01, 1995 

MAY 03, 1995 AUG 01, 1995

Appendix B 65
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-33N1

Local name 1-10

Site identification number 351525116402901

Top of perforations 160

Bottom of perforations 320

Altitude 2424.69

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 03, 1992 2272.62 V

JUL 13, 1993 2275.00 V

SEP 14 2274.45 V

FEE 03, 1994 2275.54 V

15 2275.61 V

APR 03 2276.19 V

JUL 21, 1994 2276.79 V

SEP 07 2276.65 V

DEC 13 2281.38 V

LOWEST 2272.62 

HIGHEST 2281.38

DEC 03, 1992 

DEC 13, 1994

State well number 14N/3E-33Q1

Local name TH-4

Site identification number 351527116395201

Top of perforations 98

Bottom of perforations 158

Altitude 2385.03

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

FEE 01, 

JUL 13 

SEP 14

1993

WATER 

LEVEL MS

2290.23 V 

2290.28 V 

2292.25 V

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

FEE 15, 1994 2292.37 V

MAR 30 2292.52 V

JUL 22 2293.04 V

SEP 07, 1994 2293.24 V

MAR 08, 1995 2293.94 V

NOV 02 2294.72 V

LOWEST 2290.23 

HIGHEST 2294.72

FEE 01, 1993 

NOV 02, 1995

State well number 14N/3E-33R1

Local name STP-3

Site identification number 351530116394401

Top of perforations 72

Bottom of perforations 112

Altitude 2379.13

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

DEC 02, 1992 2314.71 V

JUL 13, 1993 2318.24 V

SEP 14 2316.42 V

FEB 15, 1994 2316.32 V

MAR 30 2316.40 V

JUL 21 2316.94 V

SEP 08, 1994 2316.79 V

DEC 06 2317.10 V

FEB 06, 1995 2317.50 V

LOWEST 2314.71 

HIGHEST 2320.

DEC 02, 1992 

SEP 18, 1996

State well number 14N/3E-34D1

Local name MW1

Site identification number 351604116393101

Top of perforations

Bottom of perforations

Altitude 2437.15

DATE

WATER 

LEVEL MS

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER 

DATE LEVEL MS DATE

WATER 

LEVEL MS

SEP 14, 1993 2290.63 VR

23 2291.81 V

FEB 15, 1994 2290.97 V

MAR 30, 

JUN 07 

SEP 22

1994 2291.05 V 

2291.21 V 

2291.11 V

NOV 09, 1994 2290.96 V

FEB 01, 1995 2291.11 V

MAY 10 2296.22 V

LOWEST 2290.63 

HIGHEST 2296.22

SEP 14, 1993 

MAY 10, 1995

DATE

WATER 

LEVEL MS

MAR 08, 1995 2276.79 V 

AUG 08 2276.06 V

DATE

WATER 

LEVEL MS

DATE

WATER 

LEVEL MS

AUG 03, 1995 2317.87 V 

SEP 18, 1996 2320. V

WATER 

DATE LEVEL MS

AUG 01, 1995 2291.26 V

66 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix B. Water-level data for selected wells in Irwin Basin at Fort Irwin National Training Center, California, 

1992-96 Continued

State well number 14N/3E-34M1

Local name MW4

Site identification number 351550116393101

Top of perforations

Bottom of perforations

Altitude 2398.39

DATE

WATER 

LEVEL MS

ALTITUDE, IN FEET ABOVE SEA LEVEL

WATER 

DATE LEVEL MS DATE

WATER 

LEVEL MS

SEP 14. 1993 2287.66 V

FEE 16, 1994 2288.03 V

MAR 30 2288.15 V

JUN 07, 

JUL 22 

SEP 08

1994 2288.35 V 

2288.37 V 

2288.39 V

NOV 14, 1994 2288.29 V

FEE 02, 1995 2288.61 V

MAY 02 2287.09 V

WATER 

DATE LEVEL MS

AUG 02, 1995 2288.97 V

LOWEST 2287.09 

HIGHEST 2288.97

MAY 02, 1995 

AUG 02, 1995

State well number 14N/3E-34M2

Local name LFMW6

Site identification number 351539116393001

Top of perforations 96

Bottom of perforations 116

Altitude 2420

On Fort Irwin National Training Center. Driller observation well. Diameter 5 inches, depth 116 feet,

perforated 96-116 feet. Altitude of land-surface datum 2,420 feet. Water-level records available 1994

to current year.

ALTITUDE, IN FEET ABOVE SEA LEVEL

DATE

JUN 07, 

JUL 20 

SEP 08

1994

WATER 

LEVEL MS

2320.8 V

2319.9 V

2321.1 V

DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS DATE

WATER 

LEVEL MS

NOV 08. 1994 2321.3 V

DEC 13 2321.4 V

JAN 31, 1995 2321.7 V

MAY 02, 1995 2322.0 V

AUG 01 2327.3 V

SEP 18, 1996 2324.7 V

LOWEST 2319.9 

HIGHEST 2327.3

JUL 20, 1994 

AUG 01, 1995

Appendix B 67
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96

[ft, foot; |iS/cm, microsiemens per centimeter; red, yellow, green, and blue are the tape colors that were used to mark the lysimeter tubing at the surface, and 

indicate the deepest (red) through the shallowest (blue) lysimeter]

STATE

WELL LOCAL

NUMBER NAME

13N/3E-4B1 SP1-240

13N/3E-4B2 SP1-180

13N/3E-4B3 SP1-130

13N/3E-4B4 NITS

13N/3E-AB5LYS NITS (RED)

13N/3E-4B6LYS NITS (YELLOW)

13N/3E-4B7LYS NITS (GREEN)

13N/3E-4C1 WC1-320

13N/3E-4C2 WC1-220

13N/3E-4C3 WC1-150

STATION NUMBER

351521116400201

351521116400202

351521116400203

351515116395201

351515116395202

351515116395203

351515116395204

351514116401401

351514116401402

351514116401403

DATE

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

TIME

1315

1430

1415

1400

1600

1320

1145

1730

1530

1600

1230

1340

1440

1441

1515

1035

1015

1130

0904

1410

1442

1320

1315

1055

1100

1012

1150

1200

1745

1530

1135

1430

0915

1345

1345

1915

1730

1237

1330

1630

DEPTH 

BELOW 

LAND

SURFACE

(WATER

LEVEL)

(FT)

103.93

103.48

103.11

104.06

103.47

103.08

104.26

103.76

103.10

--

--

__

119.85

121.72

117.80

117.61

118.07

115.82

119.63

119.50

117.77

117.51

117.38

115.52

119.07

119.18

117.18

DEPTH

OF

WELL,

TOTAL

(FT)

240.00

240.00

240.00

180.00

180.00

180.00

130.00

130.00

130.00

97.00

97.00

97.00

68.00

46.00

46.00

46.00

46.00

46.00

46.00

46.00

35.00

320.00

320.00

320.00

320.00

320.00

320.00

320 . 00

220.00

220.00

220.00

220.00

220.00

220.00

220.00

150.00

150.00

150.00

150.00

150.00

ALT. 

OF LAND 

SURFACE

DATUM

(FT.

ABOVE

NGVD)

2390

2390

2390

2390

2390

2390

2390

2390

2390

2380

2380

2380

2380

2380

2380

2380

2380

2380

2380

2380

2380

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

2400

SPECIFIC

CONDUCTANCE

(US/CM)

1610

1660

1520

1350

1370

1360

2360

2320

2230

--

1860

1970

1360

811

825

808

808

805

800

1020

695

725

719

752

734

723

725

1430

1440

1450

1150

1170

SPECIFIC 

CONDUCTANCE

LAB

(US/CM)

1600

1650

1680

1350

1360

1370

2150

2290

2270

--

1890

1990

1070

--

833

829

818

816

811

811

1000

723

547

724

751

737

733

719

1470

1450

1480

1140

1140

PH 

WATER 

WHOLE

FIELD

(STANDARD

UNITS)

7.5

7.9

7.7

7.5

7.9

7.8

7.9

7.8

7.8

7.5

7.3

6.9

8.2

8.2

8.2

8.1

8.1

8.2

8.3

7.9

8.0

8.1

8.0

8.0

8.0

8.2

7.5

7.6

7.7

7.5

7.9

68 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL

NUMBER

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

DATE

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

PH 

WATER 

WHOLE 

LAB 

(STANDARD

UNITS)

7.8

7.8

7.6

7.7

7.8

7.9

7.8

7.7

7.5

7.5

7.4

8.3

8.1

7.9

8.1

8.0

8.0

8.0

8.0

8.0

8.2

8.0

7.9

7.9

7.9

8.0

7.5

8.2

7.6

7.4

7.8

TEMPERATURE

AIR

(DEG C)

__

18.5

--

18.0

12.0

17.0

24.0

__

23.5

__

7.5

27.0

35.5

24.0

7.0

28.5

32.5

25.0

35.0

TEMPERATURE

WATER

(DEG C)

26.0

26.5

24.0

26.0

27.0

24.0

25.5

25.5

22.5

17.5

20.0

27.5

25.5

25.5

26.5

26.5

26.0

25.0

26.5

25.0

25.0

26.0

26.5

26.0

24.5

23.0

24.0

26.5

27.0

OXYGEN, 

DISSOLVED

(MG/L)

__

2

3

4

2

3

3

3

7

6

.0

.2

.6

.4

.8

.8

.7

.8

.2

CALCIUM 

DISSOLVED

(MG/L

AS CA)

48

52

55

32

35

37

120

110

110

76

82

__

34

34

12

13

14

14

14

16

29

13

14

15

15

15

15

16

48

52

60

37

40

MAGNESIUM, 

DISSOLVED

(MG/L

AS MG)

5.6

6.0

6.0

3.8

4.0

4.1

16

15

15

9.7

9.7

12

14

2.2

1.9

1.8

1.7

1.8

1.8

4.4

2.1

2.1

2.0

1.8

1.9

2.0

2.1

10

11

11

7.1

7.4

SODIUM, 

DISSOLVED

(MG/L

AS NA)

250

260

260

220

220

220

350

340

330

300

300

--

240

250

160

150

150

150

150

150

170

140

130

130

130

130

130

130

230

220

210

170

170

POTASSIUM, 

DISSOLVED

(MG/L

AS K)

16

17

16

15

15

7.5

24

23

24

22

22

7.8

10

8.5

9.0

<7.9

9.0

8.3

9.9

10

9.2

9.8

9.3

9.7

9.7

9.7

8.6

17

17

14

15

15

CARBONATE 

WAT.DIS 

FET 

FIELD

C03

(MG/L)

__

--

Appendix C 69
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

CARBONATE

IT-LAB

DATE (MG/LC03)

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

ALKALINITY

WAT DIS

FIX END

FIELD

CAC03

(MG/L)

110

120

120

97

85

100

140

62

68

150

230

250

__

130

120

130

130

120

130

120

130

120

130

130

130

130

120

89

79

83

88

93

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

114

123

115

98

84

102

132

62

68

147

230

242

_

126

123

129

127

124

128

132

124

130

126

127

126

87

79

82

88

93

ALKALINITY

LAB

(MG/L

AS

CAC03)

123

125

126

100

97

96

76

71

71

254

235

_

126

130

133

131

127

130

123

133

135

136

131

132

132

131

86

85

85

101

97

SULFATE

DISSOLVED

(MG/L

AS S04)

260

280

280

220

220

220

460

480

470

190

220

2.0

330

290

260

140

180

220

12

150

150

150

140

140

130

180

110

110

110

120

120

110

110

250

240

250

190

190

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

210

220

230

180

180

190

390

360

360

260

300

5.0

220

190

160

84

100

120

4.0

62

57

58

56

57

58

99

52

50

48

53

51

51

48

200

190

200

150

150

FLUORIDE,

DISSOLVED

(MG/L

AS F)

5.5

6.5

5.5

6.2

5.9

6.3

4.5

5.2

4.5

2.0

2.2

<.20

20

34

31

12

9.6

13

<.20

9.3

9.1

9.2

9.5

12

9.6

8.9

7.7

7.5

7.1

8.2

7.9

7.8

8.1

4.3

4.0

4.1

5.0

5.0

BROMIDE

DISSOLVED

(MG/L

AS BR)

0.77

.85

.79

.60

.71

.71

1.3

1.2

1.1

.55

<.20

1.4

.70

<1.0

.25

<.30

<.40

<.20

.25

.24

.23

.23

.24

.24

.36

.22

.21

.21

.23

.22

.22

.21

.45

.73

.73

.55

.57

IODIDE,

DISSOLVED

(MG/L

AS I)

0.029

.029

.027

.046

.042

.040

.024

.051

.053

.063

.073

_

.023

.022

.020

.027

.022

.018

.022

.014

.012

.011

.014

.014

.013

.013

.033

.039

.038

.026

.026

70 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

DATE

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

SILICA,

DISSOLVED

(MG/L

AS

SI02)

69

72

73

69

75

74

73

78

61

65

68

65

72

57

67

77

66

69

69

72

79

82

71

78

84

83

79

72

72

87

63

71

SOLIDS, 

RESIDUE

 180

DEC. C

DISSOLVED

(MG/L)

1010

1050

1080

852

866

872

1520

1530

1520

1210

1270

720

562

549

540

526

528

529

668

511

491

497

520

494

503

502

968

886

936

744

751

NITROGEN,

NITRATE

DISSOLVED

(MG/L

AS N)

_

18.8

.050

3.73

2.53

3.22

2.73

2.15

.150

.040

.020

2.47

12.0

1.39

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

<0.010

<.010

<.010

<.010

<.010

<.010

.150

<.010

<.010

<.020

.970

.970

.580

.470

.250

.030

.030

.020

.030

.010

<.010

<.010

<.010

<.010

<.010

<.010

<.010

<.010

<.010

.030

<.010

<.010

.010

.010

NITROGEN,

N02+N03

DISSOLVED

(MG/L

AS N)

10.0

11.0

7.50

7.50

7.70

9.20

19.0

22.0

17.0

4.70

3.50

3.80

3.20

2.40

_

2.50

2.40

2.30

2.40

2.30

3.50

3.10

3.00

3.00

2.80

2.80

12.0

12.0

12.0

1.40

6.90

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

0.030

<.015

<.010

<.015

.030

<.015

.050

<.015

<.015

.002

.030

.020

.020

.015

__

<.010

.010

<.010

<.010

<.015

<.015

<.010

.020

<.010

<.015

<.015

<.010

.030

<.010

.020

.020

NITROGEN, AMMONIA +

ORGANIC

DIS.

(MG/L

AS N)

<0.20

<.20

<.20

<.20

<.20

<.20

.60

.80

.50

.50

.30

<.20

<.20

.20

__

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

.20

<.20

PHOSPHORUS

DISSOLVED

(MG/L

AS P)

0.010

<.010

.840

.230

.060

.040

.050

.020

<.010

.650

.540

.090

.070

.070

.050

.050

.090

.890

.260

.180

.020

.020

3.30

.950

.770

.080

.490

PHOSPHORUS

ORTHO ,

DISSOLVED

(MG/L

AS P)

<0.010

.020

.340

.210

.040

.040

.040

.030

.020

1.90

.800

2.30

.900

.710

.570

<.400

.400

1.20

.090

.070

.090

.050

.060

.080

.690

.270

.200

.020

.010

2.00

.650

.780

<.010

.500

Appendix C 71
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-AB1

13N/3E-AB2

13N/3E-AB3

13N/3E-ABA

13N/3E-AB5LYS

13N/3E-AB6LYS

13N/3E-AB7LYS

13N/3E-AC1

13N/3E-AC2

13N/3E-AC3

DATE

05-26-9A

08-2A-9A

12-21-9A

05-26-9A

08-24-9A

12-21-94

05-26-9A

08-2A-9A

12-21-9A

01-10-95

02-14-95

11-02-95

12-07-9A

12-07-9A

12-20-9A

12-23-9A

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-2A-9A

08-25-9A

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-9A

12-28-9A

05-16-96

07-28-93

09-16-93

11-05-93

05-26-9A

09-22-9A

ALUMINUM, 

DISSOLVED 

(UG/L 

AS AL)

_

--

9.0

28

1A

9.0

37

7.0

ANTIMONY, ARSENIC 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS SB) AS AS)

_ _

17

2A

19

12

<1

A5

<1.0 48

<1.0 AS

-_

A3

A3

53

<1.0 Al

<1.0 AO

37

A6

19

<1.0 16

<1.0 1A

21

BARIUM, 

DISSOLVED 

(UG/L 

AS BA)

__

57

38

<100

33

10

9.0

9.0

11

12

<100

11

16

20

2A

<100

35

A6

60

39

BERYLLIUM, BORON, CADMIUM 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L 

AS BE) AS B) AS CD)

1800

1700

1800

1400

1300

1AOO

1300

1200

1300

A900

5900

1900

1400

<1.0 1300 <1.0

<1.0 1300 <1.0

1300

1200

1200

1200

1100

<1.0 1100 <1.0

<1.0 980 <1.0

1100

1000

1000

1000

1100

<1.0 1000 <1.0

<1.0 990 <1.0

1100

990

CHROMIUM, 

DISSOLVED 

(UG/L 

AS CR)

_

--

7.0

6.0

10

8.0

5.0

4.0

72 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

DATE

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

COBALT, COPPER, IRON, 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L 

AS CO) AS CU) AS FE)

<3.0

<3.0

<3.0

21

<3.0

<3.0

20

- -- <10

-- -- <10

10

<3.0

__

4.0

83

7.0

<1. o *1.0 <3 . 0

<1.0 <1.0 28

<3.0

<3.0

<3.0

4.0

7.0

<1, 0 <1. 0 8.0

<1.0 <1 .0 8.0

<3.0

<3.0

4.0

9.0

34

<1.0 <1.0 19

<1.0 1.0 21

<3.0

<3.0

LEAD, LITHIUM 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS FB) AS LI)

--

__

88

69

100

130

__

__

74

_

33

<1.0 40

<1.0 30

--

__

33

45

32

<1.0 40

<1.0 40

33

35

85

<1.0 90

2.0 100

69

MANGANESE, 

DISSOLVED 

(UG/L 

AS MN)

1.0

<1.0

<1. 0

11

2.0

<1.0

<10

<10

<10

10

13

__

<1.0

<10

4.0

1.0

<1.0

<1.0

<1.0

<1.0

<1.0

3.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

49

18

5.0

3.0

<1.0

MOLYBDENUM, NICKEL, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS MO) AS NI)

__

--

--

--

__

--

62 <1.0

59 <1.0

__

58 <1.0

57 <1.0

--

__

30 <1.0

28 1.0

__

Appendix C 73
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

DATE

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

SELE- STRONNIUM, SILVER, TIUM,

DIS- DIS- DISSOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L

AS SE) AS AG) AS SR)

__ _ __

420

310

860

600

__

200

99

1 <1.0 120

<1 <1.0 110

120

240

110

1 <1.0 130

<1 <1.0 110

120

130

490

<1 <1.0 540

1 <1.0 590

370

THALLIUM,

DISSOLVED

(UG/L

AS TL)

__

_

__

_

<0.50

__

<0.50

_

__

<0.50

URANIUM

ZINC, NATURAL

DIS- DISSOLVED SOLVED TRITIUM

(UG/L (UG/L TOTAL

AS ZN) AS U) (PCI/L)

_ __ _

_

_

_ _ 

_ _ _

3.0 5.0 <0.3

2.0 6.0

_

<1.0 7.0 <0.3

1.0 8.0

_ _ __

2.0 3.0 0.7

2.0 3.0

TRITIUM

IN

WATER

MOLECULES

(TU)

__

_

_

<0.2

<.2

_

_

<.21

74 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

DATE

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

05-26-94

08-24-94

12-21-94

01-10-95

02-14-95

11-02-95

12-07-94

12-07-94

12-20-94

12-23-94

01-10-95

02-14-95

04-12-95

01-24-96

12-07-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

12-28-94

05-16-96

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

TRITIUM N15/N14

WATER TRITIUM N03

MOLE- 2 SIGMA FRAG

CULES WATER, CARBON WATER

COUNT WHOLE, 14 FLTRD

ERROR TOTAL PERCENT 0.45 U

(TU) (PCI/L) MODERN PER MIL

__ -- _. __

__

--

.1 .40 13.5

.1 .40 13.2

.1 .40

11.4

C-13/

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

__

-10.10

-9.00

-9.50

H-2/

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

-89.8

-90.8

-91.2

-92.4

-87.1

-86.6

-73.9

-75.7

-94.3

-94.6

-95.8

-94.3

-96.1

-92.3

-92.4

-93.9

-94.3

-93.4

-89.3

-89.8

-89.3

-90.0

-88.7

0-18/

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

-10.77

-10.66

-11.14

-11.16

-10.34

-9.92

-7.35

-7.52

-11.76

-11.82

-11.77

-11.69

-11.64

-11.66

-11.69

-11.70

-11.57

-11.54

-10.79

-10.97

-10.76

-11.04

-11.18

Appendix C 75
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

LOCAL

NAME

WC1-150

WC2-320

WC2-250

WC2-170

STP-1

STP-4

NIT2-238

NIT2-190

NIT2-135

IT-1

NIT1

STATION NUMBER

351514116401403

351523116402801

351523116402802

351523116402803

351504116400301

351456116395001

351449116400501

351449116400502

351449116400503

351450116402301

351441116400401

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

TIME

1610

1600

1330

1200

1600

1130

1700

0930

1835

1330

1100

0900

1100

1200

1520

1525

1435

1630

1040

1630

1145

1245

1350

1245

1445

1450

0935

1110

1030

1015

1545

1200

1400

1335

1340

1545

1600

1110

1530

1120

DEPTH 

BELOW 

LAND

SURFACE

(WATER

LEVEL)

(FT)

115.23

145.64

142.66

142.61

143.63

144.93

142.28

142.09

142.86

140.76

144.37

142.04

141.81

140.32

140.32

101.34

99.21

99.21

97.80

67.54

_

66.83

64.30

92.37

91.92

93.10

93.10

_

67.25

73.83

DEPTH

OF

WELL,

TOTAL

(FT)

150.00

320.00

320.00

320.00

320.00

250.00

250.00

250.00

250.00

250.00

170.00

170.00

170.00

170.00

170.00

170.00

140.00

140.00

140.00

140.00

140.00

140.00

140.00

85.00

__

238.00

238.00

190.00

190.00

135.00

135.00

135.00

351.00

90.00

90.00

90.00

90.00

ALT. 

OF LAND 

SURFACE

DATUM

(FT.

ABOVE

NGVD)

2400

2420

2420

2420

2420

2420

2420

2420

2420

2420

2420

2420

2420

2420

2420

2420

2386

2386

2386

2386

2386

2386

2386

2375

2375

2375

2375

2375

2385

2385

2385

2385

2385

2385

2385

2410

2385

2385

2385

2385

SPECIFIC

CONDUCTANCE

(US/CM)

1460

899

833

829

821

764

768

756

753

764

729

1060

867

844

844

1450

1420

1320

1320

1320

1390

360

3060

3010

3070

3050

832

882

776

851

776

815

815

695

3940

2600

2830

SPECIFIC 

CONDUCTANCE

LAB

(US/CM)

1430

920

821

830

823

778

758

755

758

992

806

854

1470

1450

1340

1330

1340

1300

3400

3120

3080

3100

3010

840

781

782

812

810

709

4040

2590

2830

PH 

WATER 

WHOLE

FIELD

(STANDARD

UNITS)

8.1

8.2

8.2

8.3

8.2

8.1

8.2

8.1

8.2

8.2

8.0

7.5

7.6

8.0

8.0

8.2

7.8

7.9

8.0

7.8

7.9

7.4

7.3

7.1

7.2

7.2

7.8

8.2

7.8

8.0

7.5

8.0

8.0

8.1

7.6

7.8

7.7

76 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

FH 

WATER

WHOLE

LAB

(STANDARD

UNITS)

7.8

8.2

8.0

8.1

8.0

8.0

7.9

7.9

7.9

7.2

7.5

7.5

7.2

7.9

7.7

7.7

7.7

7.8

7.7

7.5

7.3

7.1

7.4

7.2

8.0

7.9

7.7

7.8

7.7

8.1

7.2

7.5

7.5

TEMPERATURE

AIR

(DEC C)

_

41.5

6.0

30.0

7.0

36.0

34.0

35.5

37.0

37.0

24.0

__

19.0

42.0

24.0

18.5

37.5

22.5

31.0

23.5

35.0

23.5

37.0

37.0

23.0

20.0

TEMPERATURE

WATER

(DEG C)

24.0

28.0

27.5

26.5

26.0

27.5

27.0

26.5

26.0

26.5

26.5

27.5

27.5

23.5

25.0

23.0

24.5

_

23.5

25.0

22.5

23.5

__

22.0

23.5

23.0

26.0

22.0

26.0

23.5

26.5

26.5

25.5

20.0

19.0

22.0

OXYGEN,

DISSOLVED

(MG/L)

5.0

2.8

4.8

4.6

6.6

6.6

_

3.8

3.6

__

4.4

3.4

4.0

4.0

4.8

4.6

4.2

4.6

4.6

CALCIUM

DISSOLVED

(MG/L

AS CA)

60

13

11

11

12

12

11

12

13

__

52

12

_

60

63

51

50

53

210

170

170

170

17

20

26

33

34

25

390

230

280

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

11

2.4

2.0

1.7

1.7

1.8

1.7

1.8

1.8

_

17

3.3

__

10

10

8.6

8.6

9.0

31

27

26

27

2.7

3.2

5.0

5.6

5.7

4.2

60

35

37

SODIUM,

DISSOLVED

(MG/L

AS NA)

200

170

150

150

150

140

140

140

140

150

160

212

210

210

190

190

200

480

480

490

470

150

133

120

120

120

110

430

350

340

POTASSIUM,

DISSOLVED

(MG/L

AS K)

17

8.0

8.6

8.2

9.5

7.7

8.8

8.4

9.8

__

7.9

9.7

--

19

17

--

18

18

16

30

6.1

31

30

9.9

--

11

--

11

13

14

10

29

21

22

CARBONATE

WAT.DIS

FET

FIELD

COS

(MG/L)

_

--

--

--

--

Appendix C 77
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

ALKALINITY

CAR- WAT DIS

BONATE FIX END

IT-LAB FIELD

(MG/L- CAC03

COS) (MG/L)

78

110

110

110

110

120

130

120

120

120

130

97

97

92

91

100

90

94

86

370

410

400

410

390

130

120

120

120

120

110

110

120

58

53

60

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

__

109

110

112

107

122

136

125

120

132

__

92

91

98

91

88

372

412

408

411

391

128

119

121

123

58

51

ALKALINITY

LAB

(MG/L

AS

CAC03)

84

114

112

116

114

124

126

126

127

__

140

143

__

91

94

95

95

94

93

307

411

415

409

394

127

124

122

116

116

126

69

62

65

SULFATE

DISSOLVED

(MG/L

AS S04)

250

190

150

150

150

140

120

120

120

_

240

120

__

220

250

260

210

210

200

210

560

470

490

480

460

130

120

-_

130

130

130

120

1100

910

1100

CHLORIDE.

DISSOLVED

(MG/L

AS CL)

210

74

63

63

62

59

53

53

53

__

94

78

_

200

210

200

180

180

190

180

570

430

440

430

410

73

67

71

82

82

55

630

210

220

FLUORIDE,

DISSOLVED

(MG/L

AS F)

4.6

10

10

12

11

9.5

9.0

11

9.6

__

3.3

5.3

__

4,1

4.0

4.4

4.4

4.4

4.0

3.3

4.0

4.0

4.3

3.8

7.6

5.3

--

3.4

3.4

3.4

3.7

1.6

2.1

2.1

BROMIDE

DISSOLVED

(MG/L

AS BR)

0.52

.26

.25

.25

.24

.23

.23

.23

.23

__

.12

.31

.76

.72

1.6

.29

.27

.28

.34

.34

.24

1.6

.47

.48

IODIDE,

DISSOLVED

(MG/L

AS I)

0.045

.022

.021

.021

.018

.015

.013

.015

.013

.038

.025

.044

.021

.063

.023

.015

.020

.014

.016

.014

.270

.085

.091

78 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL

NUMBER

13N/3E-AC3

13N/3E-AD1

13N/3E-AD2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-AK3

13N/3E-AK4

13N/3E-AM1

13N/3E-AQ2

DATE

05-16-96

08-25-93

05-24-9A

08-24-9A

12-28-9A

08-26-93

05-24-9A

08-2A-9A

12-28-9A

06-12-96

08-25-93

09-2A-93

05-24-9A

09-22-9A

06-12-96

06-12-96

12-29-92

09-23-93

ll-OA-93

11-15-94

12-06-94

02-07-95

08-08-95

ll-OA-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

SILICA, 

DISSOLVED 

(MG/L

AS

SI02)

76

71

58

71

72

71

72

72

74

37

6A

73

83

78

75

78

66

83

80

81

78

66

69

77

74

74

74

69

62

68

65

SOLIDS, 

RESIDUE 

 180 

DEC. C 

DISSOLVED

(MG/L)

926

630

536

548

544

532

480

493

506

688

610

900

933

944

914

942

862

2290

2100

2080

1900

547

524

528

552

546

482

3030

2320

2250

NITROGEN, 

NITRATE 

DISSOLVED

(MG/L

AS N)

_

1.86

2.48

.510

9.69

16.0

16.6

18.2

29.9

25.0

NITROGEN, 

NITRITE 

DISSOLVED

(MG/L

AS N)

<0.010

.040

<.010

<.010

.020

<.010

<.010

<.010

.260

<.010

<.010

<.010

.010

<.010

<.010

<.010

.020

.002

<.010

<.010

<.010

<.010

.002

<.010

<.010

<.010

<.010

<.010

<.010

<.010

<.010

.070

.040

<.010

<.010

NITROGEN, 

N02+N03 

DISSOLVED

(MG/L

AS N)

9.30

1.90

1.30

1.20

2.50

2.40

2.30

2.40

.770

2.70

3.20

3.30

7.60

9.70

8.70

14.0

16.0

16.0

16.6

22.0

21.0

21.0

20.0

18.2

2.50

2.80

2.70

2.90

2.60

3.10

3.00

2.70

30.0

25.0

22.0

23.0

NITROGEN, 

AMMONIA 

DISSOLVED

(MG/L

AS N)

<0.015

.030

<.010

<.015

.040

.010

<.015

.040

.110

<.010

.050

.050

.020

.010

<.010

.020

<.015

.003

.020

.010

<.015

<.015

.004

<.015

.040

<.015

.040

<.015

.040

.040

.020

.180

.080

.030

<.015

NITROGEN, AMMONIA + 

ORGANIC 

DIS.

(MG/L

AS N)

<0.20

<.20

<.20

<.20

<.20

<.20

<.20

<.20

3.5

<.20

<.20

<.20

.30

<.20

<.20

<.20

<.20

.11

.50

<.20

.30

.20

.23

.20

.20

.20

.20

.20

.20

.20

<.20

.70

.50

.40

.30

PHOSPHORUS 

DISSOLVED

(MG/L

AS P)

0.040

.110

.040

.050

.560

.180

.060

.020

7.70

19.0

.070

.070

.160

.020

<.010

.010

<.010

.006

<.010

<.010

<.010

<.010

.00

.070

.020

.160

.010

1.50

.020

.020

<.010

.070

<.010

.040

.020

PHOSPHORUS 

ORTHO, 

DISSOLVED

(MG/L

AS P)

0.020

.080

.060

.060

.220

.170

.070

.030

5.30

14.0

.080

.080

.090

.030

<.010

<.010

.020

.011

.010

<.010

<.010

<.010

.009

.080

.020

.120

.010

1.10

.020

.010

.010

.070

.020

<.010

.010

Appendix C 79
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

ALUM- ANTIINUM, MONY, ARSENIC 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L 

AS AL) AS SB) AS AS)

15

3

43

56

47

__ _- __

59

_ __ __

113 <1.0 13

7.0 <1.0 13

_

5.0 <1.0 7

_

32

20

15

11

11

<10 5.0 12

4

4

4

BARIUM, 

DISSOLVED 

(UG/L 

AS BA)

<100

16

17

18

21

__

8.0

_

55

66

_

40

_

19

29

21

<100

<100

39

100

<100

<100

BERYLLIUM, BORON, CADMIUM 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L 

AS BE) AS B) AS CD)

990

1400

1300

1300

1300

1300

1300

1300

1200

__ 

570

1000

_ _ __

<1.0 1100 <1.0

<1.0 1000 <1.0

1000

1000

1000

1000

<1.0 5200 1.0

4800

5200

5000

4900

1000

740

680

715

693

<.50 720 <1.0

660

680

750

CHROMIUM, 

DISSOLVED 

(UG/L 

AS CR)

__

__

__

_

6.0

3.0

__

2.0

_

__

~

_

80 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

COBALT, COPPER, IRON, 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L 

AS CO) AS CU) AS FE)

8.0

200

<3.0

<3.0

<3.0

28

14

5.0

8.0

22

35

<1.0 <1.0 250

<1.0 1.0 6.0

<3.0

<3.0

<3.0

<1.0 3.0 40

<io

20 <io

<3.0

8.0

21

<3.0

4.0

<1 . 0 <1 . 0 10

 <10

<9.0

<9.0

LEAD, LITHIUM 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS PB) AS LI)

88

28

46

51

<1.0 80

2.0 80

_

10 160

39

44

52

45

44

<1.0 35

90

80

84

MANGANESE, 

DISSOLVED 

(UG/L 

AS MN)

<1.0

12

6.0

<1.0

1.0

8.0

3.0

<1.0

<1.0

140

110

3.0

5.0

<1.0

<1.0

<1.0

3.0

20 <io

<io

5.0

4.0

23

<1.0

<1.0

<1.0

400

6.0

27

MOLYBDENUM, 

DISSOLVED 

(UG/L 

AS MO)

_ 

31

27

27

36

NICKEL, 

DISSOLVED 

(UG/L 

AS NI)

__

--

I 

3.0

2.0

--

12

<1.0

Appendix C 81
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

SELE- STRON- THALNIUM, SILVER, TIUM, LIUM,

DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L

AS SE) AS AG) AS SR) AS TL)

500

no

93

95

98

180

<1 <1.0 500

<1 <1.0 530

_

1 <1.0 1700

_

150

180

310

340

330

<1 <1.0 250

4000

2100

2600

URANIUM

ZINC , NATURAL

DIS- DISSOLVED SOLVED TRITIUM

(UG/L (UG/L TOTAL

AS ZN) AS U) (PCI/L)

__ __ 

__

_

<1.0 5.0 2.1

2.0 5.0

_ _ __

4.0 188

_

14 6.0

TRITIUM

IN

WATER

MOLECULES

(TU)

__

0.65

_

82 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

DATE

05-16-96

08-25-93

05-24-94

08-24-94

12-28-94

08-26-93

05-24-94

08-24-94

12-28-94

06-12-96

08-25-93

09-24-93

05-24-94

09-22-94

06-12-96

06-12-96

12-29-92

09-23-93

11-04-93

11-15-94

12-06-94

02-07-95

08-08-95

11-04-93

11-16-94

12-06-94

02-03-95

08-08-95

02-23-95

06-11-96

02-23-95

06-11-96

02-23-95

06-11-96

06-11-96

05-20-93

01-10-95

02-24-95

11-28-95

05-17-96

TRITIUM

WATER

MOLECULES

COUNT

ERROR

(TU)

_

0.2

N15/N14

TRITIUM N03

2 SIGMA FRAC

WATER, CARBON WATER

WHOLE, 14 FLTRD

TOTAL PERCENT 0.45 U

(PCI/L) MODERN PER MIL

_ _ _

11.9

13.3

8.0

_ _ _

0.64

17.5

 __

 -_

 __

C-13/

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

_

-6.60

-8.30

_

[--

__

_

__

H-2/

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

__

-95.0

-95.8

-95.3

-94.1

-95.2

-94.4

-90.0

-92.3

-89.6

-90.5

-90.6

-92.4

-83.8

-93.7

-93.3

-93.7

-91.6

-83.9

-75.0

0-18/

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

__

-11.78

-11.64

-11.69

-11.68

-11.65

-11.61

-11.26

-11.26

-11.09

-11.23

__

-11.13

-11.44

__

-9.27

_

-11.52

-11.38

-11.32

~

-11.61

-9.39

-7.58

Appendix C 83
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL LOCAL

NUMBER NAME STATION NUMBER

13N/3E-4Q3LYS NIT1 (RED) 351441116400402

13N/3E-4Q4LYS NIT1 (YELLOW) 351441116400403

13N/3E-4Q5LYS NIT1 (GREEN) 351441116400404

13N/3E-4Q6LYS NIT1 (BLUE) 351441116400405

DATE

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-14-96

05-16-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

DEPTH

BELOW

LAND

SURFACE

(WATER

LEVEL)

TIME (FT)

0918

1430

1000

1700

1130

1033

1330

1420

1725

0735

0900

0917

1431

1001

1701

1140

1053

1340

1425

1730

1245

0740

0900

0916

1432

1002

1702

1150

1118

1345

1430

1735

1250

0755

0900

0915

1433

1003

1703

1200

DEPTH

OF

WELL,

TOTAL

(FT)

75.00

75.00

75.00

75.00

75.00

75.00

75.00

75.00

75.00

75.00

75.00

53.50

53.50

53.50

53.50

53.50

53.50

53.50

53.50

53.50

53.50

53.50

53.50

35.00

35.00

35.00

35.00

35.00

35.00

35.00

35.00

35.00

35.00

35.00

35.00

15.00

15.00

15.00

15.00

15.00

ALT.

OF LAND

SURFACE

DATUM

(FT.

ABOVE

NGVD)

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

2385

SPECIFIC

CONDUCTANCE

(US/CM)

__

5650

2690

2250

SPE- PH

CIFIC WATER

CON- WHOLE

DUCT- FIELD

ANCE (STANDLAB ARD

(US/CM) UNITS)

__ __

7.2

7.1

7.8

84 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

PH

WATER

WHOLE

LAB TEMPER- TEMPER- OXYGEN,

(STAND- ATURE ATURE DISDATE ARD AIR WATER SOLVED

UNITS) (DEG C) (DEG C) (MG/L)

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-14-96

05-16-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

CALCIUM

DISSOLVED

(MG/L

AS CA)

__

310

380

__

300

110

_

__

27

26

_

_

12

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

__

60

71

_

54

16

_

8.0

4.3

3.3

SODIUM,

DISSOLVED

(MG/L

AS NA)

__

1500

1000

_

1200

570

_

780

490

750

POTASSIUM,

DISSOLVED

(MG/L

AS K)

__

22

22

_

24

1.0

_

9.3

2.4

_

4.2

CARBONATE

WAT.DIS

FET

FIELD

C03

(MG/L)

__

_

Appendix C 85
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

CARBONATE

IT-LAB

DATE (MG/LC03)

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-14-96

05-16-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

ALKALINITY

WAT DIS

FIX END

FIELD

CAC03

(MG/L)

_

100

290

410

ALKALINITY ALKAWAT DIS LINITY SULFATE

TOT IT LAB DISFIELD (MG/L SOLVED

MG/L AS AS (MG/L

CAC03 CAC03) AS S04)

3100

3800

3900

<.10

3500

106 3000

2900

3000

3200

2600

3200

3300

2200

294 860

760

750

740

710

710

1300

1800

1200

760

710

406 380

370

380

370

380

380

520

630

610

600

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

610

630

610

460

360

230

220

230

240

240

440

480

390

250

290

270

270

270

260

260

250

390

350

280

300

200

220

220

220

220

220

390

440

380

300

FLUORIDE,

DISSOLVED

(MG/L

AS F)

<2.5

<1.0

<1.0

1.7

<.20

<4.0

<3.0

<3.0

<3.0

<3.0

23

28

19

<.20

<4.0

<3.0

<3.0

<3.0

<3.0

<3.0

16

27

22

9.4

30

<2.0

<1.2

<1.2

<1.2

<1.2

<1.2

53

21

8.5

6.6

BROMIDE

DISSOLVED

(MG/L

AS BR)

<2.5

.90

.70

.72

.30

<2.0

<2.0

<2.0

<2.0

<2.5

<1.0

1.4

.39

<.30

<4.0

<2.0

<2.0

<2.0

<2.0

<2.0

.80

4.3

2.1

.48

<.30

1.6

<.80

<.80

<.80

1.2

1.1

1.2

1.4

1.0

.46

IODIDE,

DISSOLVED

(MG/L

AS I)

__

0.530

.280

.220

.220

86 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

DATE

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-14-96

05-16-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

SILICA,

DISSOLVED

(MG/L

AS

SI02)

__

53

51

73

74

58

61

SOLIDS,

RESIDUE

 180

DEG. C

DISSOLVED

(MG/L)

__

6380

4930

2460

2140

NITROGEN,

NITRATE

DISSOLVED

(MG/L

AS N)

27.7

32.1

1.00

1.10

.300

1.90

7.80

5.30

4.70

5.90

6.60

10.5

9.75

8.59

8.70

2.80

3.52

15.0

11.9

12.6

12.8

12.6

12.7

10.3

31.9

31.9

28.8

27.5

25.1

17.8

21.5

22.1

22.4

22.3

22.1

13.0

31.2

31.0

28.6

24.5

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

6.30

1.90

9.00

5.10

1.50

1.29

.300

.300

<.200

<.200

<.200

.450

.150

.210

1.30

.700

.550

.200

.200

.200

.200

.200

.200

.680

.140

.120

.190

.510

.630

<.200

.080

.080

.080

.080

.080

2.00

1.80

2.00

3.40

3.50

NITROGEN,

N02+N03

DISSOLVED

(MG/L

AS N)

34.0

34.0

10.0

6.20

1.80

3.19

8.10

5.60

4.70

5.90

6.60

11.0

9.90

8.80

10.0

3.50

4.07

15.0

11.9

12.6

12.8

12.6

12.7

11.0

32.0

32.0

29.0

28.0

25.7

17.8

21.5

22.1

22.4

22.3

22.1

15.0

33.0

33.0

32.0

28.0

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

0.250

.040

.130

.070

<.015

.050

.040

.040

.030

<.015

<.015

<.015

<.015

.020

<.015

.020

.040

.020

.020

<.015

NITROGEN, AMMONIA +

ORGANIC

DIS.

(MG/L

AS N)

1.3

.70

.80

.80

.70

--

.80

.70

.70

.70

.80

--

.60

.60

.50

.60

.70

.60

.70

.60

.60

.60

PHOSPHORUS

DISSOLVED

(MG/L

AS F)

_

0.060

<.010

~

.350

.130

--

1.90

1.70

--

.970

.610

PHOSPHORUS

ORTHO,

DISSOLVED

(MG/L

AS F)

<5.00

<2.00

<2.00

.010

<.010

«=.400

<3.00

<3.00

<3.00

<3.00

3.40

<2.00

<2.00

.390

.170

<.400

<4.00

<3.00

<3.00

<3.00

<3.00

<3.00

<5.00

3.40

2.80

1.90

1.70

<.400

<2.00

<1.20

<1.20

<1.20

<1.20

<1.20

1.70

2.40

<2.00

1.00

.610

Appendix C 87
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER DATE

ALUMINUM,

DISSOLVED

(UG/L

AS AL)

ANTIMONY,

DISSOLVED

(UG/L

AS SB)

ARSENIC

DISSOLVED

(UG/L

AS AS)

BARIUM,

DISSOLVED

(UG/L

AS BA)

BERYLLIUM,

DISSOLVED

(UG/L

AS BE)

BORON,

DISSOLVED

(UG/L

AS B)

CADMIUM

DISSOLVED

(UG/L

AS CD)

CHROMIUM,

DISSOLVED

(UG/L

AS CR)

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95

04-12-95 

01-24-96 

05-14-96 

05-16-96 

05-21-96

05-23-96 

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95 

04-12-95 

01-24-96 

05-15-96 

05-16-96

05-17-96 

05-21-96 

05-23-96 

12-08-94 

12-20-94

12-23-94

01-10-95

02-24-95 

04-12-95 

01-24-96

05-15-96 

05-16-96 

05-17-96 

05-21-96 

05-23-96

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95

14 100 480

160 5600

210 <100 12000

130 <100 4000

88 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

DATE

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-14-96

05-16-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

12-08-94

12-20-94

12-23-94

01-10-95

02-24-95

COBALT, COPPER, IRON, LEAD, LITHIUM 

. DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L (UG/L (UG/L 

AS CO) AS CU) AS FE) AS PB) AS LI)

_ _ _ _ _

<10 280

24

__ __ _ __ __

<10 200

20

__ _ _ _ __

<10 ~ 150

31

__

__ _ _ _ __

<10 ~ 160

MANGA- MOLYBNESE, DENUM, NICKEL, 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L 

AS MN) AS MO) AS NI)

_ _ _

50

<4.0

_

30

4.0

_ _ __

_ _ __

20

5.0

_ __ __

__ __ __

<io

Appendix C 89
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

SELENIUM,

DISSTATE SOLVED

WELL DATE (UG/L 

NUMBER AS SE)

SILVER,

DISSOLVED

(UG/L 

AS AG)

STRONTIUM,

DISSOLVED

(UG/L 

AS SR)

THALLIUM,

DISSOLVED

(UG/L 

AS TL)

ZINC,

DISSOLVED

(UG/L 

AS ZN)

URANIUM

NATURAL

DISSOLVED

(UG/L 

AS U)

TRITIUM

TOTAL 

(PCI/L)

TRITIUM

IN

WATER

MOLECULES

(TU)

13N/3E-4Q-3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95

04-12-95 

01-24-96 

05-14-96 

05-16-96 

05-21-96

05-23-96 

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95 

04-12-95 

01-24-96 

05-15-96 

05-16-96

05-17-96 

05-21-96 

05-23-96 

12-08-94 

12-20-94

12-23-94

01-10-95

02-24-95 

04-12-95 

01-24-96

05-15-96 

05-16-96 

05-17-96 

05-21-96 

05-23-96

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95

4100

400

330

90 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

DATE

TRITIUM 

WATER 

MOLECULES

COUNT 

ERROR 

(TU)

TRITIUM 

2 SIGMA

WATER, 

WHOLE,

TOTAL

CARBON

14 

PERCENT

N15/N14

NO3

FRAC

WATER

FLTRD

0.45 U

C-13 /

C-12

STABLE

ISOTOPE

RATIO

PER

H-2 / 0-18 /

H-l 0-16

STABLE STABLE

ISOTOPE ISOTOPE

RATIO RATIO

PER PER

(PCI/L) MODERN PER MIL MIL MIL MIL

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95

04-12-95 

01-24-96 

05-14-96 

05-16-96 

05-21-96

05-23-96 

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95 

04-12-95 

01-24-96 

05-15-96 

05-16-96

05-17-96 

05-21-96 

05-23-96 

12-08-94 

12-20-94

12-23-94

01-10-95

02-24-95 

04-12-95 

01-24-96

05-15-96 

05-16-96 

05-17-96 

05-21-96 

05-23-96

12-08-94 

12-20-94 

12-23-94

01-10-95

02-24-95

Appendix C 91
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

LOCAL

NAME STATION NUMBER

NIT1 (BLUE) 351441116400405

TH-5 351505116405701

AD1-255 351418116410201

STP-5 351429116395401

STP-6 351422116392501

WC3-243 351416116392201

WC3-170 351416116392202

WC3-60 351416116392203

GARLIC SPRING 351348116382701

TH-3 351542116420601

NH1-630 351616116410701

DATE

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

TIME

1105

1350

1435

1740

1255

0750

0900

1525

1540

1000

0945

1200

1630

1930

0855

1200

1700

1000

1230

0945

1530

1330

1100

1105

1200

1400

1230

1130

1155

1830

1510

1400

1250

1145

1900

1330

1300

1230

1330

1455

DEPTH 

BELOW 

LAND 

SURFACE

(WATER

LEVEL)

(FT)

__

188.99

72.39

71.66

69.22

28.60

23.25

34.70

34.74

34.61

34.57

31.75

32.21

32.26

32.35

29.88

28.90

30.31

30.46

30.67

28.45

335.10

264.51

265.00

262.45

263 . 94

263.78

DEPTH 

OF

WELL,

TOTAL

(FT)

15.00

15.00

15.00

15.00

15.00

15.00

15.00

450.00

255.00

120.00

120.00

120.00

120.00

120.00

65.00

65.00

65.00

65.00

65.00

243.00

243.00

243.00

243.00

170.00

170.00

170.00

170.00

170.00

60.00

60.00

60.00

60.00

60.00

410.00

630.00

630.00

630.00

630.00

630.00

ALT. 

OF LAND 

SURFACE 

DATUM

(FT.

ABOVE

NGVD)

2385

2385

2385

2385

2385

2385

2385

2460

2500

2378

2378

2378

2378

2378

2345

2345

2345

2345

2345

2343

2343

2343

2343

2343

2343

2343

2343

2343

2343

2343

2343

2343

2343

2310

2610

2530

2530

2530

2530

2530

SPECIFIC 

CONDUCTANCE

(US/CM)

__

2150

667

770

900

674

672

678

693

3000

2220

2230

2110

2390

788

757

752

742

771

755

755

752

755

1680

1650

1640

1020

1630

1180

689

828

849

842

779

844

SPECIFIC 

CONDUCTANCE

LAB

(US/CM)

__

--

661

765

680

686

673

--

2250

2280

2060

2370

791

751

752

755

776

755

755

758

--

1700

1670

1650

1630

--

1160

708

842

845

808

837

838

PH 

WATER 

WHOLE 

FIELD

(STAND

ARD

UNITS)

__

7.8

7.9

8.1

--

8.0

8.0

8.0

8.0

7.5

7.6

7.6

7.5

8.2

8.2

8.0

8.0

8.0

8.1

7.9

8.0

8.0

7.9

7.7

7.6

7.7

7.6

8.9

7.2

8.8

8.7

8.5

8.5

8.6

92 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

DATE

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

PH 

WATER

WHOLE

LAB

(STANDARD

UNITS)

__

8.0

8.0

7.0

7.8

8.0

7.9

7.5

7.5

7.7

7.5

8.2

7.9

7.9

7.9

8.2

7.8

7.9

7.8

7.8

7.6

7.7

7.6

9.1

7.2

8.7

8.7

7.7

8.5

8.5

TEMPERATURE

AIR

(DEG C)

__

35.0

33.0

23.5

19.5

38.5

16.0

41.5

14.0

15.0

16.0

35.5

25.5

38.0

20.0

TEMPERATURE

WATER

(DEG C)

__

25.5

26.5

20.0

22.5

24.5

20.0

25.0

19.5

21.5

25.0

27.0

27.0

23.0

25.0

26.0

26.5

24.0

26.0

24.0

23.5

23.5

22.0

24.5

33.0

26.5

28.5

29.5

26.5

26.0

28.0

OXYGEN,

DISSOLVED

(MG/L)

__

4.0

3.8

.6

3.6

3.4

3.8

5.6

5.2

1.3

CALCIUM

DISSOLVED

(MG/L

AS CA)

__

5.6

_

23

15

24

23

23

73

74

87

14

15

17

17

16

16

17

17

61

72

72

73

31

20

8.8

9.5

8.4

9.0

8.7

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

__

1.7

4.5

4.2

4.7

4.6

4.7

13

12

14

2.8

2.5

2.6

2.6

2.6

2.3

2.4

2.4

10

9.3

9.3

8.9

4.9

6.5

.30

.14

.10

.08

.07

SODIUM,

DISSOLVED

(MG/L

AS NA)

_

480

100

120

112

110

110

110

405

390

390

410

140

130

130

130

140

130

140

130

270

240

240

240

200

110

160

160

160

160

160

POTASSIUM,

DISSOLVED

(MG/L

AS K)

_

2.5

9.0

6.9

5.8

5.6

5.5

20

19

18

7.5

8.2

7.8

10

8.8

8.8

8.8

9.5

18

17

18

20

8.2

9.5

8.1

8.1

8.5

7.8

8.3

CARBONATE

WAT.DIS

FET

FIELD

COS

(MG/L)

_

19

12

7.7

Appendix C 93
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

DATE

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

CARBONATE

IT-LAB

(MG/L -

COS)

__

--

--

ALKALINITY

WAT DIS

FIX END

FIELD

CAC03

(MG/L)

__

500

120

100

130

120

130

130

370

380

390

140

130

130

140

120

120

130

270

220

230

220

220

230

69

67

59

56

62

110

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

_

501

--

118

100

127

118

128

127

368

382

388

138

129

132

142

123

114

269

214

231

222

224

70

60

56

58

113

ALKALINITY

LAB

(MG/L

AS

CAC03)

__

117

105

131

130

130

298

376

388

374

136

133

133

134

136

137

135

139

237

235

230

230

229

72

64

62

61

63

61

SULFATE

DISSOLVED

(MG/L

AS S04)

610

290

380

360

340

340

340

110

140

110

110

100

110

210

280

300

230

300

130

120

120

120

120

120

120

110

250

240

240

220

200

130

180

180

180

180

170

CHLORIDE,

DISSOLVED

(MG/L

AS CD

260

170

200

210

210

210

210

51

69

50

52

51

51

330

300

310

290

300

59

52

52

53

57

51

53

52

210

210

200

210

82

71

71

75

70

71

69

FLUORIDE.

DISSOLVED

(MG/L

AS F)

<0.20

3.3

<1.2

<1.2

<1.2

<1.2

<1.2

3.1

2.6

2.2

2.0

2.2

6.3

5.7

6.6

5.1

7.5

7.3

9.3

2.0

7.3

7.2

6.6

3.6

4.5

4.3

3.8

<0.10

10

5.7

16

16

16

16

16

BROMIDE

DISSOLVED

(MG/L

AS BR)

0.30

3.4

<0.80

<0.80

<0.80

<0.80

<0.80

0.23

0.32

0.25

0.25

0.24

0.24

0.24

0.23

0.24

0.24

0.52

0.61

0.49

0.53

<0.010

0.28

0.26

0.26

0.25

0.26

0.26

IODIDE,

DISSOLVED

(MG/L

AS I)

__

0.015

0.051

0.013

0.015

0.017

0.013

0.009

0.013

0.015

0.013

0.063

0.024

0.018

0.016

0.041

0.059

0.014

0.018

0.015

0.009

0.010

94 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-AQ6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

1AN/3E-31K1

1AN/3E-32B1

DATE

04-12-95

01-2A-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-9A

12-30-92

11-28-9A

12-06-9A

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

SILICA, 

DISSOLVED 

(MG/L

AS

SI02)

__

57

61

17

70

72

69

73

71

75

72

58

61

64

68

76

76

79

77

--

71

78

80

80

56

34

70

72

71

70

78

SOLIDS, NITRO- NITRO- NITRO- NITRO- NITRORESIDUE GEN, GEN, GEN, GEN, GEN, AM- PHOS- 

 180 NITRATE NITRITE N02+N03 AMMONIA MONIA + PHORUS 

DEG. C DIS- DIS- DIS- DIS- ORGANIC DISDIS- SOLVED SOLVED SOLVED SOLVED DIS. SOLVED

SOLVED

(MG/L)

_

453

465

455

476

488

470

1430

1450

1320

1560

506

494

492

500

523

506

507

511

1080

1060

1040

1060

794

443

557

540

556

561

550

(MG/L

AS N)

15.8

5.56

13.2

15.1

14.4

14.1

13.6

4.54

4.54

3.72

16.7

2.38

2.89

3.09

6.36

1.48

(MG/L

AS N)

3.02

<0.200

<0.080

<0.080

<0.080

<0.080

<0.080

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

0.060

0.060

0.080

0.320

0.020

<0.010

<0.010

0.010

<0.010

<0.010

0.010

0.040

<0.010

<0.010

<0.010

<0.010

0.020

<0.010

<0.010

<0.010

<0.010

<0.010

(MG/L

AS N)

18.8

5.56

13.2

15.1

14.4

14.1

13.6

3.60

2.50

2.50

2.90

2.70

2.70

2.60

1.80

4.60

4.60

3.80

17.0

2.40

2.50

2.50

2.90

2.90

__

2.80

3.10

6.40

6.70

__

7,10

7.60

<0.050

1.50

0.290

0.300

0.270

0.280

0.240

(MG/L

AS N)

__

0.020

<0.010

<0.010

<0.015

<0.015

O.015

<0.010

<0.015

<0.015

<0.015

0.010

<0.010

<0.015

0.010

0.020

<0.015

0.050

0.050

0.020

_

<0.015

0.050

0.030

0.020

<0.010

0.010

<0.010

<0.010

<0.015

(MG/L

AS N)

__

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.40

0.30

0.40

0.90

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.80

<0.20

__

<0.20

<0.20

0.60

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

(MG/L

AS F)

_

<0.010

0.280

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

0.090

0.010

0.030

1.10

0.180

0.070

0.030

3.90

0.170

__

0.100

0.030

0.020

<0.010

0.320

0.420

0.250

0.180

0.090

PHOSPHORUS 

ORTHO, 

DISSOLVED

(MG/L

AS

1

1

<1

<1

<1

<1

<1

<0

0

<0

<0

0

<0

<0

0

0

<0

0

0

0

0

0

0

0

3

0

0

0

0

<0

0

0

0

0

0

P)

.30

.60

.20

.20

.20

.20

.20

.010

.290

.010

.010

.010

.010

.010

.010

.020

.010

.090

.020

.020

.660

.180

.080

.020

.00

.170

__

.100

.030

.010

.010

.210

.380

.260

.210

.110

Appendix C 95
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

DATE

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

ALUMINUM, 

DISSOLVED 

(UG/L 

AS AL)

__

9.0

161

33

ANTIMONY, ARSENIC 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS SB) AS AS)

__ _

-_ __

<1.0 8

10

15

_ _

17

14

<1.0 21

28

<1.0 31

29

29

24

BARIUM, 

DISSOLVED 

(UG/L 

AS BA)

_

__

37

20

__

22

_

21

81

22

12

13

12

12

13

BERYLLIUM, BORON, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS BE) AS B)

__ _

_

<1.0 650

800

720

720

720

2600

2800

2600

2900

1100

1100

1000

1000

1100

1100

1000

1100

1800

1700

1600

1700

<1.0 1800

770

1700

<1.0 1700

1700

1700

1700

CHROCADMIUM MIUM, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS CD) AS CR)

_ . _

<1.0 6.0

_ _ .

<1.0 2.0

__

<1.0 <1.0

96 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

COBALT, 

DISSOLVED 

DATE (UG/L 

AS CO)

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93 <1.0

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93 <1.0

05-25-94

05-21-93

09-22-93 <1.0

07-19-94

09-22-94

12-20-94

COPPER, IRON, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS CU) AS FE)

_

42

1.0 8.0

1100

<3.0

<3.0

5.0

<10

20

<10

22

4.0

<3.0

<3.0

39

16

<3.0

<3.0

530

8.0

<3.0

<3.0

1.0 28

340

10

<1.0 12

<3.0

<3.0

6.0

LEAD, LITHIUM 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS PB) AS LI)

__ __

__ __

<1.0 40

11

19

17

71

<1.0 41

12

<1.0 10

20

13

18

MANGANESE, 

DISSOLVED 

(UG/L 

AS MM)

__

3.0

5.0

27

<1.0

<1.0

<1.0

<10

20

<10

4.0

<1.0

<1.0

<1.0

10

<1.0

<1.0

<1.0

25

<1.0

<1.0

<1.0

6.0

100

3.0

1.0

<1.0

<1.0

<1.0

MOLYBDENUM, NICKEL, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS MO) AS NI)

_

28 <1.0

90 <1.0

74 <1.0

Appendix C 97
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

DATE

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

SELE- STRON- THALNIUM, SILVER, HUM, LIUM,

DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L

AS SE) AS AG) AS SR) AS TL)

_ _ _ _

1 <1.0 250 <0.50

270

190

__

200

710

<1.0 470

60

<1 <1.0 70

44

47

47

URANIUM

ZINC, NATURAL

DIS- DISSOLVED SOLVED TRITIUM

(UG/L (UG/L TOTAL

AS ZN) AS U) (PCI/L)

__ __ 

2.0 7.0

_.

_ _ _

__

2.0 4.0

<1.0 <1.0 -0.1

TRITIUM

IN

WATER

MOLECULES

(TU)

__

~~

<0.2

98 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

DATE

04-12-95

01-24-96

05-15-96

05-16-96

05-17-96

05-21-96

05-23-96

07-28-93

07-20-94

12-30-92

11-28-94

12-06-94

02-07-95

08-03-95

12-30-92

11-15-94

12-05-94

02-06-95

08-03-95

09-22-93

05-25-94

08-25-94

12-27-94

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

09-23-93

05-25-94

08-25-94

12-27-94

06-13-96

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

TRITIUM

WATER

MOLECULES

COUNT

ERROR

(TU)

_ .

0.2

TRITIUM

2 SIGMA

WATER,

WHOLE,

TOTAL

(PCI/L)

__

--

__

0.50

CARBON

14

PERCENT

MODERN

-_

9.0

10.4

92.6

N15/N14

N03

FRAC

WATER

FLTRD

0.45 U

PER MIL

__

22.9

7.1

C-13 /

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

__

__

_

_

-8.60

-8.50

_

-10.20

-8.30

-8.70

H-2 /

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

__

-90.1

-91.7

-94.9

-95.6

-94.9

-94.8

-94.4

-94.5

-77.2

-76.8

-77.9

--

-90.5

-91.7

-95.2

-96.5

-97.9

-96.3

0-18 /

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

__

-11.24

-11.47

-11.87

-11.74

-11.75

-11.70

-11.75

-11.74

-8.23

-8.07

-8.08

-11.43

-11.23

-11.75

-11.80

-11.57

-11.69

Appendix C 99
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

LOCAL

NAME

NH1-630

NH1-540

NH1-300

I-3A

BASEBALL-460

BASEBALL-290

1-7

1-6

I-5A

FI1-440

FI1-355

FI1-290

FI1-230

STATION NUMBER

351616116410701

351616116410702

351616116410703

351553116411001

351558116412101

351558116412102

351556116404601

351547116405001

351538116410301

351539116405603

351539116405604

351539116405605

351539116405606

DATE

05-21-96

06-02-93

09-22-93

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93

04-20-93

05-18-94

04-20-93

06-02-93

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93

05-18-94

08-23-94

12-22-94

05-05-93

TIME

1245

1315

1740

1700

1745

1555

1715

1200

0830

1800

1315

1020

0950

1600

1235

1520

1130

1340

1630

1330

1040

1041

1300

0945

1515

1830

1100

1200

1135

1815

1100

1600

1330

1455

1100

1415

1000

1500

1750

1300

DEPTH 

BELOW 

LAND 

SURFACE

(WATER

LEVEL)

(FT)

263.02

264.35

264.86

262.89

263.70

262.85

264.21

263.11

262.60

__

__

__

203.79

204.87

204.85

205.89

207.30

203.94

205.50

204.60

205.77

207.09

205.65

204.52

205.74

206.87

204.77

DEPTH 

OF

WELL,

TOTAL

(FT)

630.00

540.00

540.00

540.00

540.00

540.00

300.00

300.00

300.00

300.00

494.00

494.00

494.00

460.00

290.00

490.00

490.00

340.00

340.00

551.00

551.00

551.00

551.00

551.00

440.00

440.00

440.00

440.00

440.00

355.00

355.00

355.00

355.00

355.00

290.00

290.00

290.00

290.00

290.00

230.00

ALT. 

OF LAND 

SURFACE 

DATUM

(FT.

ABOVE

NGVD)

2530

2530

2530

2530

2530

2530

2530

2530

2530

2530

2500

2500

2500

2530

2530

2461

2461

2468

2468

2484

2484

2484

2484

2484

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

2472

SPECIFIC 

CONDUCTANCE

(US/CM)

844

898

874

879

858

849

867

947

1040

797

825

925

795

825

787

875

875

891

887

882

836

807

812

817

871

836

844

823

848

737

710

738

772

790

1390

SPECIFIC 

CONDUCTANCE

LAB

(US/CM)

835

885

866

842

845

837

872

1330

934

1030

785

842

931

799

841

802

868

783

881

878

880

832

820

808

813

868

546

847

814

846

738

547

753

762

787

1420

PH 

WATER 

WHOLE 

FIELD

(STAND

ARD

UNITS

8.6

7.7

7.7

8.1

8.3

8.6

7.7

7.0

7.3

8.1

8.1

8.6

8.0

8.1

8.2

8.0

8.0

8.0

7.8

7.6

7.9

8.2

8.0

8.2

7.8

7.8

7.6

7.7

7.6

7.6

7.8

7.9

7.9

7.8

7.7

100 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

DATE

05-21-96

08-02-93

09-22-93

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93

04-20-93

05-18-94

04-20-93

06-02-93

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93

05-18-94

08-23-94

12-22-94

05-05-93

FH 

WATER 

WHOLE 

LAB 

(STANDARD

UNITS)

8.5

7.8

7.8

8.0

8.2

8.5

7.7

7.1

7.2

7.3

8.1

8.1

8.2

8.4

7.9

8.3

8.2

8.3

8.0

8.1

8.2

8.2

7.9

7.9

7.7

8.3

8.0

8.1

8.1

7.7

8.5

7.6

7.8

7.6

7.7

8.3

7.9

8.1

7.8

7.8

TEMPERATURE 

AIR

(DEG C)

32.

38.

33.

28.

26.

22.

22.

21.

25.

19.

21.

21.

21.

15.

18.

__

22.

16.

17.

14.

26.

0

0

0

0

5

0

5

5

0

5

5

5

0

0

5

5

0

0

0

5

TEMPERATURE 

WATER

(DEG C)

28.0

27.5

28.5

26.5

28.5

27.5

27.5

26.5

25.5

26.0

24.0

25.0

22.5

27.0

25.0

26.0

26.0

26.0

26.0

26.0

27.5

25.0

31.0

26.0

24.5

26.5

24.5

27.0

25.0

25.0

26.0

23.0

28.5

24.0

25.5

CALCIUM 

OXYGEN, DISDIS- SOLVED 

SOLVED (MG/L

(MG/L) AS

8.

5.

5.

4.

5.

6.

7.

4.

7.

13

12

7.2 13

0 7.

5.6 11

15

14

14

13

20

15

15

16

9.

11

12

1.9 13

6.

6.

12

8.

5.

8.

11

5.4 13

24

CA)

3

4

1

9

7

6

6

0

2

2

2

3

1

3

1

6

MAGNESIUM, 

DISSOLVED 

(MG/L

AS MG)

0.06

1.1

1.0

.35

.34

.23

1.5

.85

1.3

1.2

1.9

1.8

.59

1.7

16

1.6

.60

1.5

3.4

2.9

2.9

2.8

2.0

1.3

1.3

1.2

2.4

1.7

3.2

1.6

1.8

1.8

2.2

2.4

5.3

SODIUM, 

DISSOLVED 

(MG/L

AS NA)

160

170

170

170

160

170

170

190

210

142

140

150

180

147

133

160

143

144

150

150

150

150

170

160

150

150

160

160

170

160

150

130

140

150

250

CARPOTAS- BONATE 

SIUM, WAT.DIS 

DIS- FET 

SOLVED FIELD 

(MG/L C03

AS K) (MG/L)

8.6

5.4

5.4

6.0

5.5

6.0

11

11

12

8.9

9.3

10

4.5

9.4

8.4

10

8.6

9.2

9.4

10

10

9.9

9.0

9.0

9.6

9.3

7.6

7.8

8.8

8.4

7.3

8.1

8.7

10

14

_

--

_

Appendix C 101
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

1AN/3E-32B1

1AN/3E-32B2

1AN/3E-32B3

14N/3E-32F1

1AN/3E-32F2

1AN/3E-32F3

14N/3E-32H1

1AN/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32KA

1AN/3E-32K5

1AN/3E-32K6

DATE

05-21-96

06-02-93

09-22-93

07-19-9A

09-22-9A

05-21-96

09-23-93

07-20-9A

09-23-9A

05-21-96

OA-20-93

06-02-93

11-03-95

02-22-95

02-22-95

OA-20-93

05-21-93

OA-20-93

05-18-9A

OA-20-93

06-02-93

06-02-93

07-19-9A

07-20-9A

05-OA-93

09-1A-93

05-17-9A

08-23-9A

12-22-9A

05-OA-93

09-15-93

05-17-9A

08-23-9A

12-22-9A

05-05-93

09-15-93

05-18-9A

08-23-94

12-22-9A

05-05-93

ALKALINITY

CAR- WAT DIS

BONATE FIX END

IT-LAB FIELD

(MG/L- CAC03

C03) (MG/L)

56

70

71

7A

72

69

130

170

190

<1.0

96

96

88

8A

<1.0

120

<1.0

98

<1.0

110

110

98

110

120

210

100

110

100

130

130

1AO

130

120

110

130

130

1AO

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

__

70

71

7A

72

_

13A

167

96

9A

86

82

120

100

107

107

98

108

20A

99

108

103

127

136

126

122

106

127

131

137

ALKALINITY

LAB

(MG/L

AS

CAC03)

60

7A

75

81

7A

72

135

318

170

235

96

98

103

92

86

115

118

93

107

110

110

11A

113

115

106

108

106

127

125

1A2

150

121

115

136

1A6

282

SULFATE

DISSOLVED

(MG/L

AS SOA)

180

180

170

170

170

170

150

150

150

120

130

1AO

180

1AO

150

150

1AO

1AO

130

1AO

1AO

1AO

170

160

150

150

150

1AO

1AO

1AO

120

110

110

110

190

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

69

7A

7A

71

70

72

66

66

62

65

69

72

7A

71

7A

68

67

63

85

85

87

82

66

60

61

61

62

60

62

60

51

A9

56

56

130

FLUORIDE,

DISSOLVED

(MG/L

AS F)

12

15

15

15

16

15

6.5

4. A

A.O

13

11

10

21

10

11

8. A

11

10

8.1

7.2

7. A

7.8

8.0

9.9

11

12

3.6

7.9

8.0

7.6

.20

8.5

8. A

8. A

3.6

5.5

BROMIDE

DISSOLVED

(MG/L

AS BR)

0.26

.31

.31

.25

.27

.26

.29

.26

.27

.29

.24

.28

.26

.27

.3A

.35

.3A

.25

.24

.24

.26

.24

.48

.26

.68

.25

.25

.22

.23

.24

.25

.24

.42

IODIDE,

DISSOLVED

(MG/L

AS I)

0.008

.020

.011

.022

.013

.012

.014

.023

.013

.016

.075

.016

.026

.019

.022

.023

.023

.018

.016

.016

.013

.012

.028

.019

.010

.012

.014

.012

.013

.019

.018

.018

.085

102 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

DATE

05-21-96

06-02-93

09-22-93

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93

04-20-93

05-18-94

04-20-93

06-02-93

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93

05-18-94

08-23-94

12-22-94

05-05-93

SILICA, 

DISSOLVED 

(MG/L

AS

SI02)

70

82

81

80

79

84

76

77

42

63

62

72

59

70

70

65

61

62

73

74

74

74

69

73

66

68

59

59

59

60

65

SOLIDS. NITRO- NITRO- NITRO- NITRO- NITRORESIDUE GEN, GEN, GEN, GEN, GEN, AM- PHOS- 

 180 NITRATE NITRITE N02+N03 AMMONIA MONIA + PHORUS 

DEG. C DIS- DIS- DIS- DIS- ORGANIC DISDIS- SOLVED SOLVED SOLVED SOLVED DIS. SOLVED

SOLVED

(MG/L)

550

628

620

574

573

562

610

645

676

433

504

542

595

516

488

554

449

532

491

554

--

572

575

627

509

548

556

502

616

576

686

552

499

510

474

496

488

511

916

(MG/L

AS N)

__

0.360

0.230

2.98

1.28

1.27

1.99

1.83

2.68

2.07

(MG/L

AS N)

<0.010

0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

0.010

<0.010

<0.010

0.020

<0.010

<0.010

<0.010

0.020

<0.010

0.030

<0.010

<0.010

<0.010

0.010

0.070

<0.010

<0.010

<0.010

<0.010

0.020

<0.010

<0.010

0.130

(MG/L

AS N)

0.250

0.370

0.380

0.300

0.310

0.180

2.70

2.60

2.60

3.20

3.50

3.80

0.240

2.90

2.50

2.10

2.80

3.00

4.70

5.00

5.30

5.30

1.30

1.20

1.30

1.20

1.20

2.20

2.00

1.90

1.80

1.60

2.90

2.90

2.70

2.50

2.40

2.20

(MG/L

AS N)

<0.015

0.030

<0.010

0.020

<0.010

0.020

0.020

<0.010

0.020

0.010

<0.015

0.030

<0.015

0.030

0.040

0.020

0.010

<0.010

0.020

0.020

0.040

0.020

<0.015

0.030

0.250

0.130

0.020

<0.015

0.010

0.020

0.030

0.010

<0.015

0.020

(MG/L

AS N)

<0.20

<0.20

<0.20

0.30

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

(MG/L

AS P)

0.240

9.80

6.20

2.10

2.00

0.330

5.40

9.40

13.0

0.020

0.020

0.010

0.580

<0.010

0.020

<0.010

<0.010

<0.010

9.30

2.00

0.350

0.180

0.080

14.0

>2.00

6.30

3.30

3.70

8.90

1.60

0.250

0.170

0.150

5.40

PHOSPHORUS 

ORTHO, 

DISSOLVED

(MG/L

AS P)

0.250

4.10

4.00

1.60

1.50

0.330

2.80

8.70

13.0

<0.010

<0.010

0.030

0.560

<0.010

0.010

<0.010

<0.010

<0.010

6.80

1.80

0.390

0.170

0.090

5.50

3.50

5.70

2.90

3.70

5.10

1.50

0.280

0.160

0.170

3.50

Appendix C 103
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

DATE

05-21-96

06-02-93

09-22-93

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93

04-20-93

05-18-94

04-20-93

06-02-93

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93

05-18-94

08-23-94

12-22-94

05-05-93

ALUMINUM, 

DISSOLVED 

(UG/L 

AS AL)

__

820

_

_

5.0

<10

2.0

2.0

3.0

3.0

84

482

164

ANTIMONY, ARSENIC 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS SB) AS AS)

34

44

<1.0 39

18

37

8

54

27

__

<1.0 45

39

44

15 31

41

<1.0 32

<1.0 32

<1.0 15

<1.0 35

44

<1.0 40

36

44

36

<1.0 44

50

41

44

<1.0 39

35

39

30

BARIUM, 

DISSOLVED 

(UG/L 

AS BA)

13

14

12

9.0

11

18

3.0

4.0

13

13

10

25

23

22

23

20

23

14

16

22

24

13

8.0

52

6.0

9.0

7.0

15

17

18

BERYLLIUM, BORON, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS BE) AS B)

1600

1700

<1.0 1700

1600

1600

1500

1400

1400

1400

__ . _

<1.0 1400

1400

1700

1500

<0.50 1500

1300

<1.0 1100

<1.0

<1.0 1100

<1.0 1100

1400

<1.0 1500

1400

1300

1200

<1.0 1400

1300

1200

1100

<1.0 1200

1200

1200

1100

CHROCADMIUM MIUM, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS CD) AS CR)

. _ 

<1.0 <1.0

--

<1.0 4.0

<1.0

<1.0 6.0

<1.0 6.0

<1.0 9.0

<1.0 9.0

<1.0 3.0

<1.0 5.0

<1.0 10

104 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

COBALT, 

DISSOLVED 

DATE (UG/L 

AS CO)

05-21-96

06-02-93

09-22-93 <1.0

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93 <1.0

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93 <1.0

04-20-93

05-18-94

04-20-93

06-02-93 <1.0

06-02-93 <1.0

07-19-94 <1.0

07-20-94 <1.0

05-04-93

09-14-93 <1.0

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93 <1.0

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93 <1.0

05-18-94

08-23-94

12-22-94

05-05-93

COPPER, IRON, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS CU) AS FE)

<3.0

980

1.0 1100

6.0

13

22

500

64

11

<1.0 8.0

39

3.0

5.0

<1.0 15

<3.0

<1.0 3.0

<1.0

<1.0 4.0

<1.0 3.0

940

<1.0 31

9.0

<3.0

920

1.0 330

2800

3.0

500

<1.0 120

<3.0

3.0

190

LEAD, LITHIUM 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS FB) AS LI)

15

14

1.0 10

13

13

10

41

46

<1.0 60

17

58

<1.0 44

44

<1.0 70

<1.0 62

<1.0 70

<1.0 61

13

<1.0 10

9

13

33

<1.0 40

39

32

51

<1.0 60

62

61

80

MANGANESE, 

DISSOLVED 

(UG/L 

AS MN)

<1.0

110

57

14

11

3.0

56

30

18

<30

<1.0

<1.0

53

<1.0

<30

32

<30

2.0

<30

<1.0

<1.0

<1.0

<1.0

81

5.0

2.0

<1.0

230

69

150

30

100

4.0

1.0

<1.0

95

MOLYBDENUM, NICKEL, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS MO) AS NI)

__ _

61 <1.0

61 <1.0

55 <1.0

47 <1.0

47 <1.0

48 <1.0

49 <1.0

68 <1.0

73 <1.0

62 <1.0

Appendix C 105
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

DATE

05-21-96

06-02-93

09-22-93

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93

04-20-93

05-18-94

04-20-93

06-02-93

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93

05-18-94

08-23-94

12-22-94

05-05-93

SELE- STRONNIUM, SILVER, HUM,

DIS- DIS- DISSOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L

AS SE) AS AG) AS SR)

46

110

<1 <1.0 160

94

100

88

82

130

<1 <1.0 100

47

120

<1 <1.0 100

91

1 <1.0 130

<1.0 120

<2 <1.0 120

<2 <1.0 120

140

<1 <1.0 140

130

110

190

<1 <1.0 160

240

180

140

<1 <1.0 180

160

130

290

THALLIUM,

DISSOLVED

(UG/L

AS TL)

__

__

<0.50

<0.50

<0.50

ZINC,

DISSOLVED

(UG/L

AS ZN)

__

8.0

_

4.0

__

<3.0

<1.0

<1.0

3.0

1.0

1.0

4.0

1.0

URANIUM

NATURAL

DISSOLVED TRITIUM

(UG/L TOTAL

AS U) (PCI/L)

__ __

2.0 <0.3

<.3

3.0

5.0

5.0

5.0

6.0

6.0

1.0 <.3

4.0 <.3

4.0 <.3

TRITIUM

IN

WATER

MOLECULES

(TU)

_

<0.2

<.2

< 2

< 2

< 2

106 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32B1

HN/3E-32B2

14N/3E-32B3

UN/3E-32F1

UN/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

DATE

05-21-96

06-02-93

09-22-93

07-19-94

09-22-94

05-21-96

09-23-93

07-20-94

09-23-94

05-21-96

04-20-93

06-02-93

11-03-95

02-22-95

02-22-95

04-20-93

05-21-93

04-20-93

05-18-94

04-20-93

06-02-93

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

12-22-94

05-04-93

09-15-93

05-17-94

08-23-94

12-22-94

05-05-93

09-15-93

05-18-94

08-23-94

12-22-94

05-05-93

TRITIUM

WATER

MOLECULES

COUNT

ERROR

(TU)

__

0.1

0.2

0.1

0.2

0.2

TRITIUM

2 SIGMA

WATER,

WHOLE,

TOTAL

(PCI/L)

__

0.40

0.50

0.30

0.60

0.60

CARBON

14

PERCENT

MODERN

__

6.2

_

6.3

10.7

18.0

N15/N14

N03

FRAC

WATER

FLTRD

0.45 U

PER MIL

__

7.3

7.5

6.1

7.1

C-13 /

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

__

-9.40

-9.60

_

-9.50

-9.20

--

-9.40

H-2 /

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

__

-96.4

-96.5

-97.1

-95.8

-93.5

-95.3

-92.8

-94.3

-92.7

-95.4

-96.2

-95.2

-93.4

-92.4

-91.8

-93.0

-95.7

-95.5

-96.2

-96.8

-94.2

-94.9

-95.9

-95.0

-92.9

-92.8

-92.9

-94.3

-86.1

0-18 /

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

__

-11.73

-11.78

-11.57

-11.72

-11.68

-11.48

-11.64

-11.73

-11.36

-11.53

-11.58

-11.61

-11.43

-11.41

-11.19

-11.17

-11.85

-11.97

-11.83

-11.78

-11.91

-11.83

-11.77

-11.74

--

-11.72

-11.72

-11.51

-11.44

-10.51

Appendix C 107
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

1AN/3E-32K6

1AN/3E-32M1

1AN/3E-32N1S

14N/3E-32N2

14N/3E-32N3

1AN/3E-32P2

1AN/3E-32P3

1AN/3E-32PA

1AN/3E-32P5

14N/3E-32P6

1AN/3E-32Q3

14N/3E-33A1

1AN/3E-33B1

1AN/3E-33E2

1AN/3E-33E3

1AN/3E-33F1

1AN/3E-33G1

1AN/3E-33G2

1AN/3E-33G3

LOCAL

NAME

FI1-230

I-2A

SOC2-520

SOC2-A10

SOC2-270

SOC1-90A

SOC1-730

SOC1-580

SOC1-A05

SOC1-270

1-8

BC1

ALFA

PICNIC- 220

PICNIC-175

IX- 1

ALF1

ALF2

ALF3

STATION NUMBER

351539116A05606

3515A3116A13A01

351525116A 13001

351525116A 13002

351525116A 13003

351527116A12501

351527116A 12502

351527116A 12503

351527116A1250A

351527116A 12505

351525116A11301

351614116394401

351608116395701

351556116A02A01

351556116A02A02

351602116A01101

351551116395601

351559116395701

351602116355101

DATE

09-15-93

05-18-9A

08-23-9A

OA-20-93

06-02-93

09-15-93

11-09-9A

11-29-95

05-1A-96

11-29-95

05-1A-96

11-29-95

05-22-96

07-21-9A

09-15-9A

07-21-9A

09-20-9A

07-22-9A

09-15-9A

07-20-9A

09-1A-9A

05-01-95

09-20-9A

05-01-95

05-11-95

07-19-9A

11-08-9A

01-31-95

05-02-95

07-31-95

11-10-9A

05-25-9A

09-21-9A

11-09-95

09-21-9A

11-30-95

05-25-9A

11-08-9A

11-30-9A

11-10-9A

TIME

1730

1300

1015

1500

0930

1A30

1200

1050

1315

12AO

1630

1AAO

1130

1200

1100

1800

1830

1130

1500

1630

1830

1800

1730

1930

OOAO

0920

1130

1000

1000

2000

0930

1230

1600

1030

1500

0930

1500

1200

1600

1230

DEPTH 

BELOW 

LAND 

SURFACE 

(WATER

LEVEL)

(FT)

20A.76

205.20

__

250 . 65

250.86.

250.61

250 . 8A

2A9.A2

2A9.27

2A3.AO

239.80

2A5.69

2A2.97

2A1.A5

2A3.2A

2A1.36

2A1.53

2A1.10

2A2.75

239.08

1A5.83

1A5.99

1A5.88

1A6.01

1A6.02

1A9.99

149.39

150. A2

1A9.37

150.38

139. AA

DEPTH 

OF 

WELL,

TOTAL

(FT)

230.00

230.00

230.00

_

520.00

520.00

A10.00

A10.00

270.00

270.00

90A.OO

904.00

730.00

730.00

580.00

580.00

A05.00

A05.00

A05.00

270.00

270.00

185.00

185.00

185.00

185.00

185.00

__

220.00

220.00

220 . 00

175.00

175.00

27A.OO

ALT. 

OF LAND 

SURFACE 

DATUM 

(FT.

ABOVE

NGVD)

2A72

2A72

2A72

2550

2550

2550

2550

2530

2530

2530

2530

2530

2530

2517

2517

2517

2517

2517

2517

2517

2517

2517

2517

2517

2A8A

2A20

2A20

2A20

2A20

2A20

2A05

2A25

2A25

2A25

2A25

2A25

2A16

2396

2AOO

2398

SPECIFIC 

CONDUCTANCE

(US/CM)

1A50

1AOO

1A10

9A1

9A8

0

828

802

1100

11AO

1320

1350

1180

1140

1020

924

867

818

871

1030

919

1260

1280

1370

849

831

824

834

836

770

954

933

830

1030

788

781

800

776

730

SPECIFIC 

CONDUCTANCE

LAB

(US/CM)

547

1470

1440

930

546

75

837

805

1120

1140

1350

1330

1120

1130

908

906

810

804

842

1020

928

1240

1280

1360

841

834

827

834

949

1020

835

907

799

788

836

786

808

PH 

WATER 

WHOLE 

FIELD 

(STANDARD

UNITS)

8.6

7.5

7.5

8.1

8.0

8.8

8.2

8.3

7.6

7.7

7.7

7.6

8.5

8.5

8.3

8.3

7.8

7.9

7.5

7.3

7.4

7.7

7.9

7.7

8.0

8.1

8.0

8.1

8.1

8.4

7.6

7.6

8.1

7.6

8.1

8.0

7.9

8.3

7.9

108 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

HELL

NUMBER

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

DATE

09-15-93

05-18-94

08-23-94

04-20-93

06-02-93

09-15-93

11-09-94

11-29-95

05-14-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

PH 

WATER

WHOLE

LAB

(STANDARD

UNITS)

8.3

7.7

7.7

8.0

8.1

8.5

7.7

8.0

8.1

7.4

7.6

7.6

7.6

8.4

8.4

8.1

8.0

7.7

7.7

7.3

7.2

7.3

7.5

7.6

7.5

7.9

7.9

7.9

8.5

7.5

7.3

8.0

7.5

8.0

7.9

7.8

8.0

7.9

TEMPERATURE

AIR

(DEC C)

__

21.0

21.5

22.5

33.0

23.0

39.0

29.5

36.0

32.5

36.0

33.0

32.0

23.5

32.5

21.0

14.5

33.0

21.0

13.5

23.0

37.5

12.0

31.5

25.0

16.0

7.0

TEMPERATURE

WATER

(DEG C)

26.0

24.0

26.0

25.0

26.5

20.0

24.0

27.5

24.0

26.5

23.0

25.0

27.0

28.5

28.0

27.5

27.0

27.5

24.0

25.0

25.0

24.5

21.0

23.0

26.0

26.0

24.5

25.0

25.0

25.5

26.5

26.0

23.0

29.5

21.0

26.5

24.0

23.5

23.0

OXYGEN,

DISSOLVED

(MG/L)

__

0

.6

6.4

7.0

6.2

3.6

0

3.4

7.0

7.0

6.6

2.6

6.0

CALCIUM

DISSOLVED

(MG/L

AS CA)

33

38

39

19

17

18

.15

11

11

31

42

43

45

8.5

8.6

5.4

5.7

6.2

6.3

9.0

12

14

25

41

56

15

15

16

15

12

6.9

11

12

13

17

18

17

17

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

6.8

7.6

7.8

4.3

3.4

3.5

.03

1.2

.97

9.8

11

11

11

.86

.88

1.1

.95

1.4

.97

3.2

3.5

3.6

5.6

7.9

14

1.6

1.5

1.6

1.2

3.7

1.6

1.4

2.7

1.1

1.4

2.8

2.9

1.9

SODIUM,

DISSOLVED

(MG/L

AS NA)

250

250

260

152

160

170

14

150

150

170

170

210

210

210

220

180

180

150

160

160

190

170

210

210

190

150

150

150

150

190

180

150

190

150

140

150

150

140

POTASSIUM,

DISSOLVED

(MG/L

AS K)

32

17

17

9.0

11

10

.80

8.0

7.6

14

15

17

18

3.9

3.9

2.7

2.9

6.3

6.3

9.7

11

10

14

15

18

10

11

9.7

14

9.8

8.4

9.2

11

11

14

12

13

13

CARBONATE

WAT.DIS

FET

FIELD

COS

(MG/L)

_

 

--

--

--

Appendix C 109
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

DATE

09-15-93

05-18-94

08-23-94

04-20-93

06-02-93

09-15-93

11-09-94

11-29-95

05-14-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

CARBONATE

IT-LAB

(MG/L -

COS)

__

<1.0

ALKALINITY

WAT DIS

FIX END

FIELD

CAC03

(MG/L)

350

340

370

100

180

16

62

59

74

78

130

140

80

85

56

70

78

76

92

120

95

92

120

130

170

170

170

170

140

140

130

160

120

130

140

110

290

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

346

336

357

101

184

15

60

74

132

79

85

54

68

78

76

91

113

95

96

117

132

166

166

167

171

142

140

133

165

116

133

136

109

288

ALKALINITY

LAB

(MG/L

AS

CAC03)

331

361

367

64

99

99

11

72

62

82

82

145

146

91

96

64

68

83

85

103

115

105

113

129

143

174

175

173

143

150

183

147

153

133

135

146

109

143

SULFATE

DISSOLVED

(MG/L

AS SO4)

180

160

160

130

140

140

1.4

170

170

160

170

190

200

260

260

190

200

170

160

130

140

120

180

220

230

120

110

120

130

160

140

120

160

120

120

130

130

120

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

130

140

130

110

110

110

9.5

73

64

150

150

180

180

93

96

73

71

58

59

85

110

95

130

140

160

53

50

50

66

62

61

56

62

58

55

70

67

63

FLUORIDE,

DISSOLVED

(MG/L

AS F)

4.2

5.0

6.9

9.2

7.2

7.3

0.70

12

13

4.0

4.5

3.6

3.6

12

12

20

21

14

12

6.7

5.4

4.8

3.9

4.6

4.2

5.1

5.5

4.7

4.4

8.7

8.4

8.4

4.5

8.3

5.4

6.4

5.6

5.2

BROMIDE

DISSOLVED

(MG/L

AS BR)

0.57

0.53

0.52

0.43

0.44

0.24

0.23

0.61

0.60

0.71

0.72

0.26

0.24

0.25

0.24

0.23

0.22

0.35

0.41

0.41

0.52

0.61

0.22

0.37

0.25

0.26

0.26

0.26

IODIDE,

DISSOLVED

(MG/L

AS I)

<0.001

0.120

0.230

0.027

0.021

0.054

0.035

0.030

0.027

0.038

0.028

0.085

0.087

0.064

0.062

0.044

0.049

0.022

0.040

0.023

0.041

0.025

0.053

0.042

0.036

0.042

0.060

0.023

0.034

110 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14H/3E-32N3

14N/3E-32P2

14N/3E-32P3

14H/3E-32P4

14N/3E-32P5

14N/3E-32P6

14H/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14H/3E-33E3

14H/3E-33F1

14N/3E-33G1

14N/3E-33G2

14H/3E-33G3

DATE

09-15-93

05-18-94

08-23-94

04-20-93

06-02-93

09-15-93

11-09-94

11-29-95

05-14-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

SILICA. 

DISSOLVED 

(MG/L

AS

SI02)

67

74

66

63

62

15

82

88

64

63

69

65

27

27

28

27

85

81

66

70

64

56

57

66

44

44

44

64

60

69

66

59

70

64

71

73

63

SOLIDS, NITRO- NITRO- NITRO- NITRO- NITRORESIDUE GEN, GEN, GEN, GEN, GEN, AM- PHOS- 

 180 NITRATE NITRITE N02+N03 AMMONIA MONIA + PHORUS 

DEC. C DIS- DIS- DIS- DIS- ORGANIC DISDIS- SOLVED SOLVED SOLVED SOLVED DIS. SOLVED

SOLVED

(MG/L)

908

944

898

513

589

580

560

555

692

728

834

854

704

702

574

545

566

555

578

1020

606

708

818

884

545

537

504

557

922

611

545

676

530

535

553

538

536

(MG/L

AS N)

0.290

_

0.330

0.240

_

9.49

0.090

0.080

0.410

5.88

__

8.28

_

4.93

4.81

_

4.09

5.46

5.60

(MG/L

AS N)

0.050

0.030

<0.010

<0.010

<0.010

0.120

0.010

<0.010

<0.010

<0.010

0.010

0.020

0.010

0.050

0.020

0.010

<0.010

0.020

<0.010

<0.010

<0.010

<0.010

0.120

<0.010

<0.010

<0.010

<0.010

<0.010

0.170

0.090

<0.010

<0.010

<0.010

<0.010

<0.010

0.010

0.040

0.100

(MG/L

AS N)

0.340

<0.050

8.20

7.80

8.60

1.90

0.450

0.250

11.0

11.0

9.40

9.50

<0.050

<0.050

0.140

0.100

0.420

0.400

5.90

8.30

7.90

6.50

6.90

8.40

7.40

7.40

7.50

7.60

7.70

5.10

4.90

5.50

5.00

4.70

5.40

1.20

4.10

5.50

5.70

(MG/L

AS N)

0.030

0.040

0.020

0.020

<0.010

0.040

0.040

<0.015

<0.015

<0.015

0.020

0.040

0.010

0.040

0.020

0.030

0.010

0.020

0.020

<0.015

0.010

<0.015

0.050

<0.010

<0.010

<0.015

<0.015

<0.015

0.040

0.170

0.010

<0.015

0.030

<0.015

0.020

<0.010

0.010

0.020

(MG/L

AS N)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.30

<0.20

<0.20

<0.20

<0.20

0.30

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

(MG/L

AS P)

>2.00

0.470

<0.010

<0.010

0.130

0.060

0.040

0.500

0.270

1.30

0.950

0.050

0.070

7.10

6.40

6.40

3.70

10.0

18.0

10.0

7.80

3.10

<0.010

0.030

0.030

0.010

0.040

0.020

0.050

18.0

22.0

1.30

10.0

0.150

<0.010

0.030

0.050

0.020

PHOSPHORUS 

ORTHO, 

DISSOLVED

(MG/L

AS

1

0

<0

<0

0

0

0

0

0

1

0

0

0

2

3

1

1

4

16

10

5

2

<0

0

0

0

0

0

0

8

20

1

9

0

<0

0

0

0

P)

.80

.490

.010

.010

.140

.040

.020

.470

.280

.10

.870

.050

.070

.90

.40

.20

.70

.90

.0

.0

.60

.50

.010

.020

.030

.020

.030

.030

.060

.30

.0

.00

.00

.130

.010

.030

.050

.030

Appendix C 111
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

DATE

09-15-93

05-18-94

08-23-94

04-20-93

06-02-93

09-15-93

11-09-94

11-29-95

05-14-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

ALUMINUM, 

DISSOLVED 

(UG/L 

AS AL)

69

3.0

4.0

ANTIMONY, ARSENIC 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS SB) AS AS)

<1.0 28

17

<1.0 32

^10 33

15

17

10

10

16

16

10

10

20

23

24

26

68

51

31

20

7

17

59

61

81

30

BERYLBARIUM, LIUM, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS BA) AS BE)

27 <1.0

42

20 <1.0

19 <1.0

<100

<100

<100

<100

<100

79

10

9.0

5.0

4.0

7.0

6.0

4.0

12

25

51

55

6.0

30

2.0

4.0

<100

BORON, 

DISSOLVED 

(UG/L 

AS B)

1300

1300

1200

1000

1100

850

1000

1000

790

790

810

900

1200

1200

1300

1200

920

920

980

960

940

880

1000

940

1500

--

1400

1500

1300

1500

1500

1500

1400

1300

1400

1400

1300

1300

CHROCADMIUM MIUM, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS CD) AS CR)

<1.0 <1.0

<1.0 4.0

<1.0 4.0

__

__

__

_

112 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

COBALT, COPPER, 

DIS- DISSOLVED SOLVED 

DATE (UG/L (UG/L 

AS CO) AS CU)

09-15-93 <1.0 <1.0

05-18-94

08-23-94

04-20-93

06-02-93 <1.0 <1.0

09-15-93 <1.0 <1.0

11-09-94

11-29-95

05-14-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

IRON, 

DISSOLVED 

(UG/L 

AS FE)

37

9.0

6.0

5.0

<3.0

4.0

8.0

7.0

<3.0

<3.0

<3.0

<3.0

130

5.0

170

32

400

39

150

56

7.0

7.0

8.0

30

4.0

<3.0

5.0

12

2000

59

12

99

3.0

97

9.0

<3.0

10

LEAD, LITHIUM 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS PB) AS LI)

<1.0 100

110

<1.0 80

<1.0 80

10

4

110

93

130

120

14

<4

18

10

21

14

52

77

89

110

110

22

26

22

31

20

MANGANESE, 

DISSOLVED 

(UG/L 

AS MN)

71

140

180

<30

<1.0

<1.0

<1.0

53

37

25

5.0

16

7.0

28

29

110

110

130

85

93

100

31

130

23

19

<1.0

<1.0

3.0

4.0

160

41

<1.0

68

<1.0

8.0

140

27

38

MOLYBDENUM, NICKEL, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS MO) AS NI)

35 2.0

43 <1.0

49 <1.0

Appendix C 113
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

DATE

09-15-93

05-18-94

08-23-94

04-20-93

06-02-93

09-15-93

11-09-94

11-29-95

05-14-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

SELE- STRON- THALNIUM, SILVER, TIUM, LIUM,

DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L

AS SE) AS AG) AS SR) AS TL)

<1 <1.0 400 <0.50

370

1 <1.0 150

<1 <1.0 170

90

86

320

370

420

420

83

84

98

100

no

100

140

230

320

560

490

240

370

150

230

180

ZINC,

DISSOLVED

(UG/L

AS ZN)

2.0

2.0

3.0

--

__

__

__

__

__

_

URANIUM

NATURAL

DISSOLVED TRITIUM

(UG/L TOTAL

AS U) (PCI/L)

133 2.4

5.0

5.0 0.7

__ . _

0.3

7.7

_ 

_

TRITIUM

IN

WATER

MOLECULES

(TU)

0.74

0.21

__

<0.2

2.4

__

114 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

HELL

NUMBER

1AN/3E-32K6

1AN/3E-32M1

14N/3E-32N1

14N/3E-32N2

1AN/3E-32N3

1AN/3E-32P2

1AN/3E-32P3

1AN/3E-32PA

1AN/3E-32P5

1AN/3E-32P6

1AN/3E-32Q3

1AN/3E-33A1

1AN/3E-33B1

1AN/3E-33E2

1AN/3E-33E3

1AN/3E-33F1

1AN/3E-33G1

1AN/3E-33G2

1AN/3E-33G3

DATE

09-15-93

05-18-94

08-23-9A

04-20-93

06-02-93

09-15-93

11-09-9A

11-29-95

05-1A-96

11-29-95

05-14-96

11-29-95

05-22-96

07-21-94

09-15-94

07-21-94

09-20-94

07-22-9A

09-15-9A

07-20-9A

09-1A-9A

05-01-95

09-20-9A

05-01-95

05-11-95

07-19-94

11-08-94

01-31-95

05-02-95

07-31-95

11-10-94

05-25-94

09-21-94

11-09-95

09-21-94

11-30-95

05-25-94

11-08-94

11-30-94

11-10-94

TRITIUM

HATER

MOLECULES

COUNT

ERROR

(TU)

0.1

0.1

0.2

0.2

TRITIUM

2 SIGMA

HATER, CARBON

WHOLE, 14

TOTAL PERCENT

(PCI/L) MODERN

0.40 21.9

0.40

5.7

0.60

0.60

N15/N14

N03

FRAC

HATER

FLTRD

0.45 U

PER MIL

__

7.5

7.8

8.2

6.7

8.0

7.8

__

C-13 /

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

-21.10

__

--

-7.40

_

_

H-2 /

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

-86.7

-85.4

-87.4

-90.2

-90.6

-95.8

-88.6

-88.0

-96.4

-96.2

-96.8

-96.4

-98.1

-97.5

-92.2

-89.7

-92.0

-78.5

-81.4

-89.1

-90.6

-92.9

-93.9

-91.7

-92.1

-92.7

0-18 /

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

-10.48

-10.30

-10.33

-11.18

-11.10

-11.80

-10.67

-10.08

-11.71

-11.84

-11.71

-11.82

-12.02

-12.12

-11.45

-11.06

-11.21

-9.13

-9.24

-10.46

-11.25

-11.52

-11.62

-11.37

-11.36

-11.46

Appendix C 115
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

LOCAL

NAME

ALF7

MW2

MW3

MW8

MW5

LFMW7

1-10

TH-4

STP-3

MW1

MW4

LFMW6

STATION NUMBER

351559116395702

351603116393801

351559116393701

351557116393901

351549116393801

351542116393702

351525116402901

351527116395201

351530116394401

351604116393101

351550116393101

351539116393001

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

TIME

1245

1115

1030

1040

0915

1030

1200

1400

1540

2100

1230

1630

1600

1625

1340

1930

1130

1130

1030

1015

1220

0200

1700

1315

0641

0805

1130

1630

1530

0900

1630

1620

1800

1540

1330

1430

1430

1110

1230

1350

DEPTH 

BELOW 

LAND

SURFACE

(WATER

LEVEL)

(FT)

__

123.95

123 . 63

123.53

123.47

116.65

116.44

116.21

116.21

89.10

88.39

87.14

87.73

85.19

84.56

84.17

83.93

150.24

60.89

63.37

61.63

61.30

146.19

146.04

140.93

145.89

110.10

_

109.78

111.30

109.42

100.14

DEPTH

OF

WELL,

TOTAL

(FT)

__

172.10

172.10

172.10

172.10

190.43

190.43

190.43

190.43

190.43

116.96

116.96

116.96

116.96

116.96

116.00

116.00

116.00

116.00

116.00

330.00

168.00

112.00

112.00

112.00

112.00

112.00

112.00

112.00

201.36

201.36

201.36

201.36

176.12

176.12

176.12

176.12

176.12

116.00

ALT. 

OF LAND 

SURFACE

DATUM

(FT.

ABOVE

NGVD)

2400

2412

2412

2412

2412

2404

2404

2404

2404

2404

2398

2389

2389

2389

2389

2389

2390

2390

2390

2390

2390

2425

2385

2379

2379

2379

2379

2379

2379

2379

2437

2437

2437

2437

2398

2398

2398

2398

2398

2420

SPECIFIC

CONDUCTANCE

(US/CM)

800

833

840

841

847

868

857

868

865

886

850

1020

1040

1030

1060

1090

1010

1020

1030

1050

1070

733

1570

1100

1220

1140

1150

1120

1150

1220

1050

1070

1050

1060

842

832

845

837

852

851

SPECIFIC 

CONDUCTANCE

LAB

(US/CM)

860

843

834

866

873

853

1050

1070

994

1050

1060

747

1600

1220

1160

1150

1150

1160

1190

1060

1050

843

843

844

FH 

WATER 

WHOLE

FIELD

(STANDARD

UNITS)

7.8

8.0

7.7

8.0

7.9

8.0

8.1

7.9

8.1

8.1

8.1

8.1

8.0

7.9

8.0

8.1

7.7

8.0

7.7

8.3

8.0

8.0

7.6

8.1

8.0

7.9

8.1

7.9

8.0

8.0

7.8

8.0

7.8

8.3

8.3

8.1

8.3

8.1

8.0

116 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-33G4

14N/3E-33B1

14N/3E-33B2

14N/3E-33B3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

PH 

WATER

WHOLE

LAB

(STANDARD

UNITS)

7.9

7.8

7.9

8.0

8.0

7.8

7.9

7.9

7.9

7.9

7.9

8.1

7.6

7.0

8.1

8.0

7.8

7.7

8.0

7.8

7.9

7.9

8.1

8.1

7.9

TEMPERATURE

AIR

(DEG C)

_

7.0

20.0

22.5

36.5

25.0

28.5

37.5

24.5

24.5

37.0

19.0

19.5

26.0

42.5

32.0

18.0

22.0

21.5

28.5

18.0

21.0

27.5

44.0

24.0

25.0

41.5

TEMPERATURE

WATER

(DEG C)

25.0

23.0

23.0

23.5

25.0

24.0

23.5

24.0

24.5

22.5

22.5

23.5

24.0

24.0

25.0

24.5

23.0

25.5

24.0

24.0

24.0

23.5

28.5

20.0

25.0

22.5

23.0

24.5

23.5

24.0

25.0

25.5

23.5

24.0

25.0

25.0

OXYGEN,

DISSOLVED

(MG/L)

__

4.6

4.2

4.2

4.0

5.0

4.2

6.6

6.2

6.0

6.6

7.0

6.2

4.2

7.2

7.2

__

2.6

2.6

2.2

5.6

5.6

5.0

CALCIUM

DISSOLVED

(MG/L

AS CA)

20

16

16

17

18

16

27

28

23

27

29

15

52

43

40

35

35

37

_

17

18

__

11

11

15

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

2.3

1.2

1.2

1.6

1.7

1.7

2.5

2.6

2.3

2.7

2.9

2.8

5.6

5.2

4.8

4.1

4.2

4.4

__

2.4

2.5

1.0

1.0

1.4

SODIUM.

DISSOLVED

(MG/L

AS NA)

150

150

150

150

160

140

170

170

150

170

180

130

250

195

190

190

190

190

190

..

200

190

160

170

140

POTASSIUM,

DISSOLVED

(MG/L

AS K)

15

12

10

11

11

13

15

13

11

13

13

10

18

14

14

14

14

14

__

8.9

8.5

_

11

10

10

CARBONATE

WAT.DIS

FET

FIELD

C03

(MG/L)

__

,._

~

__

Appendix C 117
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

CARBONATE

IT-LAB

(MG/L -

CO3)

_

_

ALKALINITY

WAT DIS

FIX END

FIELD

CAC03

(MG/L)

130

160

150

150

160

160

170

170

170

150

110

120

110

110

120

120

120

110

120

110

71

120

98

99

110

100

86

220

220

220

210

160

150

150

160

150

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

135

162

151

153

159

160

171

165

173

152

112

116

107

109

116

118

117

114

117

111

70

113

97

98

104

104

86

216

219

212

213

154

151

154

162

149

ALKALINITY

LAB

(MG/L

AS

CAC03)

141

164

160

178

184

148

118

114

123

119

117

111

84

112

105

104

104

104

99

__

224

222

164

165

156

SULFATE

DISSOLVED

(MG/L

AS S04)

140

--

120

120

_

120

120

130

180

190

170

180

180

120

300

240

260

220

200

200

200

210

_

160

170

_

120

120

130

CHLORIDE,

DISSOLVED

(MG/L

AS CD

72

58

58

57

61

76

110

120

97

110

110

66

220

120

120

130

150

150

150

160

_

64

65

__

56

56

61

FLUORIDE,

DISSOLVED

(MG/L

AS F)

5.2

4.5

4.3

6.0

5.3

5.3

6.8

6.1

7.1

6.9

6.3

7.8

6.0

6.5

6.3

6.9

7.3

6.3

5.3

_

4.5

4.0

__

7.0

6.4

6.4

BROMIDE

DISSOLVED

(MG/L

AS BR)

__

_

0.36

0.26

0.40

0.45

__

0.24

IODIDE,

DISSOLVED

(MG/L

AS I)

--

0.033

0.015

0.021

0.018

0.054

118 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

SILICA, 

DISSOLVED 

(MG/L

AS

SI02)

70

50

51

67

69

70

71

73

71

69

72

68

65

68

82

77

77

77

76

30

31

70

73

57

SOLIDS, NITRO- NITRO- NITRO- NITRO- NITRORESIDUE GEN, GEN, GEN, GEN, GEN, AM- PHOS- 

 180 NITRATE NITRITE N02+N03 AMMONIA MONIA + PHORUS 

DEC. C DIS- DIS- DIS- DIS- ORGANIC DISDIS- SOLVED SOLVED SOLVED SOLVED DIS. SOLVED

SOLVED (MG/L

(MG/L) AS N)

577 5.03

558

550

584

588

565 5.39

684

708

656

698

700

496

1000 8.49

750

822

762

758

754

788

670

666

568

574

557

(MG/L

AS N)

0.070

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

(MG/L

AS N)

5.10

7.30

7.40

7.30

7.50

5.90

<0.050

6.00

6.20

6.30

5.40

4.00

4.10

4.10

4.30

4.40

3.90

3.90

4.00

4.20

4.20

3.00

8.50

3.70

4.80

4.10

3.20

3.20

3.10

2.90

6.40

6.50

6.70

6.90

6.60

<0.050

6.70

6.70

6.70

4.60

(MG/L

AS N)

0.010

<0.010

<0.015

<0.015

<0.015

<0.010

<0.015

<0.015

<0.015

<0.015

0.010

<0.010

<0.015

<0.015

<0.015

<0.015

<0.010

<0.010

<0.015

<0.015

<0.015

0.020

<0.015

0.020

0.020

<0.010

<0.015

<0.015

<0.015

<0.010

<0.015

<0.015

<0.015

<0.010

<0.015

<0.015

<0.015

0.020

0.020

(MG/L

AS N)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.50

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

(MG/L

AS P)

<0.010

<0.010

0.020

0.020

<0.010

0.030

0.030

0.030

0.030

0.010

<0.010

<0.010

0.020

<0.010

0.020

<0.010

0.010

<0.010

0.020

<0.010

<0.010

0.030

<0.010

0.030

<0.010

<0.010

<0.010

<0.010

<0.010

0.030

0.030

0.040

0.020

<0.010

0.010

<0.010

<0.010

0.010

0.020

PHOSPHORUS 

ORTHO, 

DISSOLVED

(MG/L

AS P)

<0.010

<0.010

0.020

0.020

0.010

0.040

<0.010

0.030

0.020

0.020

0.010

<0.010

<0.010

<0.010

0.030

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

0.030

<0.010

0.020

<0.010

<0.010

<0.010

<0.010

<0.010

0.040

0.030

0.040

0.030

0.010

<0.010

0.020

0.010

0.020

<0.010

Appendix C 119
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

ALUM- ANTIINUM, MONY, ARSENIC BARIUM, 

DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L (UG/L 

AS AL) AS SB) AS AS) AS BA)

32 22

34

27

9.0 <1.0 28 47

28

29 42

BERYLLIUM, BORON, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS BE) AS B)

1300

1500

1400

1400

1400

1300

1200

1300

1300

1300

1300

1300

1500

1400

<1.0 1200

1100

1200

1200

1200

2200

2100

1400

1400

1500

CHROCADMIUM MIUM, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS CD) AS CR)

_

<1.0 5.0

120 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE 

WELL 

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

COBALT, 

DISSOLVED 

DATE (U6/L 

AS CO)

11-09-94

H-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93 <1.0

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

COPPER, IRON, 

DIS- DISSOLVED SOLVED 

(U6/L (U6/L 

AS CU) AS FE)

6.0

<3.0

3.0

3.0

7.0

4.0

<3.0

<3.0

5.0

4.0

8.0

15

60

25

<1.0 29

<3.0

<3.0

<3.0

9.0

<3.0

<3.0

4.0

59

LEAD, LITHIUM 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS PB) AS LI)

__ _

_.

_

39

50

80

2.0 80

28

MANGANESE, 

DISSOLVED 

(UG/L 

AS MN)

4.0

<1.0

<1.0

<1.0

4.0

<1.0

<1.0

<1.0

10

<1.0

4.0

<1.0

67

3.0

<1.0

<1.0

<1.0

<1.0

<1.0

3.0

<1.0

<1.0

230

MOLYBDENUM, NICKEL, 

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS MO) AS NI)

_

45 1.0

Appendix C 121
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

UN/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

SELE- STRON- THALNIUM, SILVER, TIUM, LIUM,

DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L

AS SE) AS AG) AS SR) AS TL)

__ _ __ __

240

<1 ~ 130 <0.50

1 ~ 420 <0.50

<1 <1.0 320

190

TRITIUM

URANIUM IN

ZINC, NATURAL WATER

DIS- DIS- MOLESOLVED SOLVED TRITIUM CULES

(UG/L (UG/L TOTAL (TU)

AS ZN) AS U) (FCI/L)

__ _ __ __

_

_

_ __ __ __

2.0 6.0

_

122 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

WELL

NUMBER

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

DATE

11-09-94

11-10-94

02-02-95

05-04-95

08-02-95

11-14-94

12-05-94

02-01-95

05-03-95

08-01-95

11-30-94

11-14-94

12-05-94

02-02-95

05-02-95

08-02-95

07-20-94

11-09-94

02-01-95

05-03-95

08-01-95

07-13-93

11-02-95

12-29-92

07-13-93

11-04-93

11-16-94

12-06-94

02-06-95

08-03-95

11-09-94

02-01-95

05-03-95

08-01-95

11-14-94

12-05-94

02-02-95

05-03-95

08-02-95

07-20-94

TRITIUM

WATER

MOLECULES

COUNT

ERROR

(TU)

__

N15/N14

TRITIUM N03

2 SIGMA FRAC

WATER, CARBON WATER

WHOLE, 14 FLTRD

TOTAL PERCENT 0.45 U

(PCI/L) MODERN PER MIL

__ __ __

6.6

7.2

9.0

9.1

_

6.9

8.7

7.4

__

6.6

~

C-13 /

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

__

__

__

._

~

__

~

H-2 /

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

__

_

-93.9

__

-91.1

-89.3

-91.8

-92.0

_

-94.9

0-18 /

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

__

--

_

-11.45

__

-11.28

-10.79

-10.99

-11.13

__

-11.49

Appendix C 123
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-86 Continued

STATE

HELL LOCAL

NUMBER NAME

14N/3E-34M2 LFMW6

STATION NUMBER DATE

351539116393001 11-08-94 

01-31-95

05-02-95

08-01-95

TIME

1500 

1500

1750

0920

DEPTH

BELOW

LAND

SURFACE

(WATER

LEVEL)

(FT)

98.75 

98.32

97.95

92.71

DEPTH

OF

WELL,

TOTAL

(FT)

116.00 

116.00

116.00

116.00

ALT.

OF LAND

SURFACE

DATUM

(FT.

ABOVE

NGVD)

2420 

2420

2420

2420

SPECIFIC

CONDUCTANCE

(US/CM)

844 

847

842

872

SPECIFIC

CONDUCTANCE

LAB

(US/CM)

__

854

855

PH

WATER

WHOLE

FIELD

(STAND

ARD

UNITS

8.1 

8.1

8.1

8.1

STATE

WELL DATE

NUMBER

14N/3E-34M2 11-08-94

01-31-95

05-02-95

08-01-95

CARBONATE

IT-LAB

(MG/L -

C03)

__

ALKALINITY

WAT DIS

FIX END

FIELD

CAC03

(MG/L)

140

140

150

140

ALKALINITY

WAT DIS

TOT IT

FIELD

MG/L AS

CAC03

143

142

149

141

ALKALINITY

LAB

(MG/L

AS

CAC03)

__

152

150

SULFATE

DISSOLVED

(MG/L

AS S04)

__

130

130

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

__

64

64

FLUORIDE,

DISSOLVED

(MG/L

AS F)

__

6.8

5.9

BROMIDE

DISSOLVED

(MG/L

AS BR)

__

IODIDE,

DISSOLVED

(MG/L

AS I)

__

STATE

WELL

NUMBER

14N/3E-34M2

DATE

11-08-94

01-31-95

05-02-95

08-01-95

PH 

WATER

WHOLE

LAB

(STANDARD

UNITS)

_

7.9

8.0

TEMPERATURE

AIR

(DEG C)

__

21.0

24.5

27.5

TEMPERATURE

WATER

(DEG C)

23.5

23.0

24.5

24.0

OXYGEN,

DISSOLVED

(MG/L)

__

7.4

7.4

7.4

CALCIUM

DISSOLVED

(MG/L

AS CA)

__

16

17

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

__

1.3

1.4

SODIUM,

DISSOLVED

(MG/L

AS NA)

__

150

160

POTASSIUM,

DISSOLVED

(MG/L

AS K)

__

10

9.3

CARBONATE

WAT. DIS

FET

FIELD

C03

(MG/L)

__

124 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

SOLIDS, NITRO- NITRO- NITRO- NITRO- NITRO- PHOSSILICA. RESIDUE GEN, GEN, GEN, GEN, GEN.AM- PHOSDIS- 180 NITRATE NITRITE N02+N03 AMMONIA MONIA + PHORUS

STATE

NELL

NUMBER

14N/3E-34M2

DATE

11-08-94

01-31-95

05-02-95

08-01-95

SOLVED

(MS/L

AS

SI02)

__

58

60

DEG. C

DISSOLVED

(MS/L)

__

558

565

DISSOLVED

(MG/L

AS N)

__

4.59

DISSOLVED

(MG/L

AS N)

<0.010

0.010

<0.010

<0.010

DISSOLVED

(MG/L

AS N)

4.80

4.60

4.60

4.50

DISSOLVED

(MG/L

AS N)

<0.010

0.015

O.015

<0.015

ORGANIC

DIS.

(MG/L

AS N)

<0.20

0.20

<0.20

<0.20

DISSOLVED

(MG/L

AS P)

<0.010

0.010

0.030

<0.010

PHORUS

ORTHO,

DISSOLVED

(MG/L

AS P)

<0.010

0.010

0.020

<0.010

STATE

WELL DATE

NUMBER

14N/3E-34M2 11-08-94

01-31-95

05-02-95

08-01-95

ALUMINUM,

DISSOLVED

(UG/L

AS AL)

__

ANTIMONY,

DISSOLVED

(UG/L

AS SB)

__

ARSENIC

DISSOLVED

(UG/L

AS AS)

__

BARIUM,

DISSOLVED

(UG/L

AS BA)

__

BERYLLIUM,

DISSOLVED

(UG/L

AS BE)

__

BORON.

DISSOLVED

(UG/L

AS B)

__

1300

1400

CADMIUM

DISSOLVED

(UG/L

AS CD)

__

CHROMIUM,

DISSOLVED

(UG/L

AS CR)

__

COBALT,

DISSTATE SOLVED

WELL DATE (UG/L

NUMBER AS CO)

COPPER,

DISSOLVED

(UG/L

AS CU)

IRON,

DISSOLVED

(UG/L

AS FE)

LEAD,

DISSOLVED

(UG/L

AS PB)

LITHIUM

DISSOLVED

(UG/L

AS LI)

MANGANESE,

DISSOLVED

(UG/L

AS MM)

MOLYBDENUM,

DISSOLVED

(UG/L

AS MO)

NICKEL,

DISSOLVED

(UG/L

AS NI)

14N/3E-34M2 11-08-94 

01-31-95 

05-02-95 

08-01-95 19

10

45

26

Appendix C 125
Appendix C. Water-quality data for selected wells, lysimeters, and a spring in Irwin Basin at Fort Irwin National Training 

Center, California, 1992-96 Continued

STATE

HELL DATE

NUMBER

14N/3E-34M2 11-08-94

01-31-95

05-02-95

08-01-95

SELENIUM,

DISSOLVED

(UG/L

AS SE)

__

SILVER,

DISSOLVED

(UG/L

AS AG)

__

STRONTIUM,

DISSOLVED

(UG/L

AS SR)

__

THALLIUM,

DISSOLVED

(UG/L

AS TL)

__

ZINC,

DISSOLVED

(UG/L

AS ZN)

__

URANIUM

NATURAL

DISSOLVED

(UG/L

AS U)

__

TRITIUM

TOTAL

(PCI/L)

__

TRITIUM

IN

HATER

MOLECULES

(TU)

__

STATE

HELL DATE

NUMBER

14N/3E-34M2 11-08-94

01-31-95

05-02-95

08-01-95

TRITIUM 

HATER

MOLECULES

COUNT

ERROR

(TU)

__

 

TRITIUM

2 SIGMA

HATER,

HHOLE,

TOTAL

(PCI/L)

__

 

CARBON

14

PERCENT

MODERN

__

 

N15/N14 

N03

FRAC

HATER

FLTRD

0.45 U

PER MIL

6.9

 

C-13 / 

C-12

STABLE

ISOTOPE

RATIO

PER

MIL

__

 

H-2 / 

H-l

STABLE

ISOTOPE

RATIO

PER

MIL

__

 

0-18 / 

0-16

STABLE

ISOTOPE

RATIO

PER

MIL

__

 

126 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
TABLES

Tables 127
Table 1. State well number, local name, and well-construction data for wells in Irwin Basin at Fort Irwin National Training 

Center, California

[ft, foot; in., inch; , no data; Obs., observation; Prod., production]

State well number

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B5LYS

13N/3E-4B6LYS

13N/3E-4B7LYS

13N/3E-4B8LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q1

13N/3E-4Q2

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

13N/3E-5D1

13N/3E-5G1

13N/3E-5G2

13N/3E-6P1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

Local name

SP1-240

SP1-180

SP1-130

NTT3

NIT3(Red)

NTT3 (Yellow)

NTT3 (Green)

NTT3 (Blue)

WC1-320

WC1-220

WC1-150

WC2-320

WC2-250

WC2-170

STP-1

STP-4

NTT2-238

NTT2-190

NTT2-135

rr-i

IX-3

NTT1

NTTl(Red)

NTT1 (Yellow)

NTT1 (Green)

NTT1 (Blue)

1-1

TH-5

1-9

TH-1

AD1-255

STP-5

STP-6

WC3-243

WC3-170

WC3-60

Altitude of 

land surface 

(ft above sea 

level)

2390

2390

2390

2380

2380

2380

2380

2380

2399.74

2399.74

2399.74

2,419.85

2,419.85

2,419.85

2385.63

2375.28

2385

2385

2385

2,410

2385

2385

2,385

2,385

2385

2,385

2,521.27

2,460

2,460

2,700

2,500

2,378.27

2344.85

2342.65

2,342.65

2,342.65

Depth 

drilled 

(ft)

260

260

260

99

99

99

99

99

340

340

340

320

320

320

140

85

238

238

238

384

300

97

97

97

97

97

524

481

457

370

277

120

65

260

260

260

Date of 

completion

02-24-94

02-24-94

02-24-94

11-10-94

11-10-94

11-10-94

11-10-94

11-10-94

07-02-93

07-02-93

07-02-93

08-13-93

08-13-93

08-13-93

12-27-89

12-18-89

11-05-94

11-05-94

11-05-94

11-26-80

10-14-80

11-03-94

11-03-94

11-03-94

11-03-94

11-03-94

03 41

12-15-87

01-29-88

01-17-88

03-06-94

01-09-90

01-10-90

08-15-93

08-15-93

08-15-93

Depth 

of well 

(ft)

240

180

130

97

320

220

150

320

250

170

140

85

238

190

135

351

300

90

524

450

450

365

255

120

65

243

170

60

Perforated 

Interval 

(ft)

220-240

160-180

110-130

92-97

'68

'46

'35

45

300-320

200-220

130-150

300-320

230-250

150-170

90-140

65-85

228-238

170-190

115-135

141-341

90-290

85-90

'75

*53.5

»35

hs

235-500

210-350

380-440

210-440

235-255

70-120

15-65

223-243

150-170

40-60

Diameter 

of well 

(In.)

2

2

2

2

2

2

2

2

2

2

5

5

2

2

2

14

4

2

14

4

14

4

2

5

5

2

2

2

Water use 

at site

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Prod.2

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Prod.2

Obs.

Prod.3

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

See footnotes at end of table.

128 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 1. State well number, local name, and well-construction data for wells in Irwin Basin at Fort Irwin National Training 

Center, California Continued

State well number

14N/3E-31K1

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

14N/3E-32L1

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P1

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q1

14N/3E-32Q2

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

Local name

TH-3

NH1-630

NH1-540

NH1-300

I-3A

BASEBALL-460

BASEBALL-290

1-7

1-6

I-5A

FI1-440

FI1-355

FI1-290

FI1-230

1-3

I-2A

SOC2-520

SOC2-410

SOC2-270

1-2

SOC1-904

SOC1-730

SOC1-580

SOC1-405

SOC1-270

1-4

1-5

1-8

BC1

ALF4

PICNIC-220

PICNIC-175

K-l

Altitude of 

land surface 

(ft above sea 

level)

2,610

2,530

2,530

2,530

2,500

2,530

2,530

2,461.33

2,468.41

2,483.76

2,472.43

2,472.43

2,472.43

2,472.43

2,496.89

2,550

2,523

2,523

2,523

2,507.24

2,517

2,517

2,517

2,517

2,517

2,471.30

2,483.63

2,495

2,420

2,405

2,425

2,425

2,416.28

Depth 

drilled 

(ft)

416

660

660

660

500

500

500

510

340

550

551

493

493

493

493

-

--

540

540

540

521

905

905

905

905

905

430

551

750

185

260

260

275

Date of 

completion

01-13-88

03-07-93

03-07-93

03-07-93

10 81

11-08-94

11-08-94

09 62

11 43

11 51

11 81

02-23-93

02-23-93

02-23-93

02-23-93

11 42

02-07-84

05-10-95

05-10-95

05-10-95

05 41

06-08-94

06-08-94

06-08-94

06-08-94

06-08-94

12 42

12 42

08 62

02-22-94

03-09-94

03-09-94

09-25-80

Depth 

of well 

(ft)

410

630

540

300

494

460

290

490

340

550

551

440

355

290

230

520

410

270

521

904

730

580

405

270

430

551

7265

185

220

175

274

Perforated 

Interval 

(ft)

260-405

610-630

520-540

280-300

300-494

440-460

270-290

220-475

200-310

340-536

320-340

375-535

420-440

335-355

270-290

210-230

234-460

290-560

500-520

390-410

250-270

215-413

850-870

894-904

710-730

560-580

385-405

250-270

185-392

220-312

350-537

5210-726

145-185

200-220

155-175

179-259

Diameter 

of well 

(In.)

4

2

2

2

14

2

2

14

14

14

2

2

2

2

14

14

2

2

2

14

2

2

2

2

2

14

14

14

2

2

2

4

Water use 

at site

Obs.

Obs.

Obs.

Obs.

Prod.

Obs.

Obs.

Prod.

Prod.

Prod.

Obs.

Obs.

Obs.

Obs.

Prod.4

Prod.

Obs.

Obs.

Obs.

Prod.4

Obs.

Obs.

Obs.

Obs.

Obs.

Prod.3

Prod.4

Prod.3

Obs.

Obs.

Obs.

Obs.

Obs.

See footnotes at end of table.

Table 1 129
Table 1. State well number, local name, and well-construction data for wells in Irwin Basin at Fort Irwin National Training 

Center, California Continued

State well number

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

rt

rt

rt

rt

Local name

ALF1

ALF2

ALF3

ALF7

MW2

MW3

MW8

MW5

LFMW7

1-10

TH-4

STP-3

MW1

MW4

LFMW6

STP7

STP8

STP9

STP11

Altitude of 

land surf ace 

(ft above sea 

level)

2395.90

2,399.70

2,398.00

2399.60

2,411.59

2,404.34

2398.00

2389.21

2390

2,424.69

2385.03

2379.13

2,437.15

2398.39

2,420

2356

2358

2370

2,394

Depth 

drilled 

(ft)

116.5

336

185

112

116

70

70

80

90

Date of 

completion

04-20-94

02-27-88

12-21-87

12-28-89

04-04-94

02-08-96

02-06-96

02-08-96

02-09-96

Depth 

of well 

(ft)

172.10

190.43

116.96

116

330

168

112

201.36

176.12

116

70

70

80

90

Perforated 

Interval 

(ft)

138-188

76-116

160-320

98-158

72-112

96-116

30-70

30-70

40-80

50-90

Diameter 

of well 

(In.)

4

4

4

5

14

4

5

4

4

5

4

4

4

4

Water use 

at site

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Prod.3

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

Obs.

^ysimeter, depth of installation.

2Destroyed in 1996.

3Unusedinl996.

4Capped

5Caliper log run on well to determine perforated interval.

6State well numbers have not been established for these wells.

130 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 2. Annual ground-water pumpage for Irwin, Bicycle, and Langford Basins near Fort Irwin National Training Center, 

California, 1941-93

[ , no data]

Year

1941

1942

1943

1944

1945

1946

1947

1948

1949

1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961

1962

1963

1964

1965

1966

1967

Irwin 

Basin1

33

130

350

480

182

57

55

55

55

55

293

336

671

668

598

602

704

686

655

746

881

1,119

1,147

1,202

U05

1409

827

Bicycle Langford _ |4 Basin* Basin3 Total

Pumpage In acre-feet

 33

 130

 350

 480

 182

 57

 55

 55

 55

 55

 293

 336

 671

 668

 598

 602

 704

 686

 655

 746

 881

 1,119

 1,147

 1,202

 U05

 1,509

822 1,649

Year

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

Irwin 

Basin1

764

121

549

364

399

321

200

236

236

64

283

502

721

660

630

720

1,675

1,133

U15

1,927

1,700

1,696

1,868

1,051

1,012

997

Bicycle Langford 

Basin2 Basin3

Pumpage In acre-feet

820 

954 

896 

608 

480 

157 

170 

210 

393 

123 

493 

462 

866 

793 

758 

866 

689 

1,243 

1,329 

822 

1,033 

829 

1,312 

1,380 

1,134 619

757 1,114

Total4

1,584

1,681

1,445

972

879

478

370

446

629

187

776

964

1,587

1,453

1,388

1,586

2,364

2,376

2,644

2,749

2,733

2,525

3,180

2,431

2,765

2,868

1 Pumpage in Irwin Basin: 1941-71,1973-77,1980 James M. Montgomery and Associates, 1981.1972,1978-89,1981 Estimated 

by U.S. Geological Survey. 1982-83 Wilson F. So and Associates, 1989.1984-93 U.S. Army, Fort Irwin Directorate of Public Works.

2 Pumpage in Bicycle Basin: 1967-71,1973-79 James M. Montgomery and Associates, 1981.1972,1980 Estimated by U.S. 

Geological Survey. 1981-83 Wilson F. So and Associates, 1989.1984-93 U.S. Army, Fort Irwin Directorate of Public Works.

3 Pumpage in Langford Basin: 1992-93 U.S. Army, Fort Irwin Directorate of Public Works.

4 Total is sum of information from various sources.

Table 2 131
Table 3. Estimate of wastewater recharge in Irwin Basin on the basis of wastewater inflow, evaporation, and 

evapotranspiration at Fort Irwin National Training Center, California, 1941-93

[All values are reported in acre-feet per year, , not irrigated daring indicated year, ft/yr, foot per year]

Year

1941

1942

1943

1944

1945

1946

1947

1948

1949

1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

Wastewater inflow estimated 

from base pumpage1 '2

Minimum

19

75

203

278

106

33

32

32

32

32

170

195

389

387

347

349

408

398

380

433

511

649

665

697

757

875

956

919

975

838

564

510

277

215

259

365

108

Maximum

23

91

245

336

127

40

39

39

39

39

205

235

470

468

419

421

493

480

459

522

617

783

803

841

914

1,056

1,154

1,109

1,177

1,012

680

615

335

259

312

440

131

Potential 

evaporation from 

ponds3

53

53

53

53

53

53

53

53

53

53

53

53

53

53

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

112

Potential 

evapotranspiration 

from fields4

365

365

365

365

365

365

365

365

365

365

365

365

365

365

365

365

365

Range of estimated recharge5'6

Minimum

0

22

150

225

53

0

0

0

0

0

117

142

336

334

294

0

0

0

0

0

31

169

185

217

277

395

476

439

495

358

84

398

165

103

147

253

0

Maximum

0

38

192

283

74

0

0

0

0

0

152

182

417

415

366

0

13

0

0

42

137

303

323

361

434

576

674

629

697

532

200

503

223

147

200

328

19

See footnotes at end of table.

132 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 3. Estimate of wastewater recharge in Irwin Basin on the basis of wastewater inflow, evaporation, and 

evapotranspiration at Fort Irwin National Training Center, California, 1941-93 Continued

Year

Wastewater inflow estimated 

from base pumpage1 '2

Potential Potential 

evaporation from evapotranspiration

Range of estimated recharge5'6

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

Average

Minimum

450

559

920

843

805

920

1,371

1,378

1,534

1,594

1,585

1,465

1,844

1,410

1,604

1,663

649

Maximum

543

675

1,111

1,017

972

1,110

1,655

1,663

1,851

1,924

1,913

1,768

2,226

1,702

1,936

2,008

783

ponds3

112

112

112

112

112

112

112

112

310

310

310

310

310

310

310

310

126

from fields4

365

365

365

365

365

430

430

430

430

430

430

430

430

216

Minimum

338

447

808

363

325

440

891

898

794

854

845

725

1,104

670

864

923

324

Maximum

431

563

999

537

492

630

1,175

1,183

1,111

1,184

1,173

1,028

1,486

962

1,196

1,268

450

1Minimum inflow estimated as 58 percent of total pumpage listed in table 2.

2Maximum inflow estimated as 70 percent of total pumpage listed in table 2.

3Potential evaporation is estimated by multiplying the area of the sewage ponds by the potential evaporation rate of 6.6 ft/yr (David Inouye, California Department of Water Resources, written commun., 1996). The area of the ponds was 8 acres from 1941 to 1954,17 acres from 1955 to 1985, and 47 

acres from 1986 to 1993.

Potential evapotranspiration is estimated by multiplying the area of the grass areas irrigated with wastewater (driving range, golf course, and sprinkler-system pivot) by the consumptive-use of 6.3 ft/yr (Sandra Owen-Joyce, U.S. Geological Survey, oral commun., 1996). The grass area included 0 acres 

from 1941 to 1954,58 acres from 1955 to 1985, and 68 acres from 1986 to 1993.

'Minimum recharge is estimated by subtracting the sum of the estimated potential evaporation and evapotranspiration from the minimum estimated 

amount of wastewater inflow.

Maximum recharge is estimated by subtracting the sum of the estimated potential evaporation and evapotranspiration from the maximum estimated 

amount of wastewater inflow.

Tables 133
Table 4. Ground-water budget for Irwin Basin at Fort Irwin 

National Training Center, California, 1993

[acre-ft/yr, acre foot per year; in/yr, inches per year, ft/yr, foot per year]

Estimated

Source of water value, 

__________________________(acre-ft/yr)

Recharge 

Natural

Precipitation................................................. 1 15Q

Artifical

Seepage of waste water 2 1,100 

Irrigation-return flow.................................... 3210

Total..................................................................... 1,460

Discharge 

Natural

Underflow.. 485 

Evapotranspiration................................. 0

Artificial

Ground-water pumpage 1,000 

Total..................................................................... 1,085

Change in storage (recharge-discharge)_________375

Assuming that precipitation recharge is uniform over the 

entire basin area, value calculated by multiplying basin area and 

precipitation recharge which was estimated as a percentage of 

average annual precipitation [1.74 percent x 5.3 in/yr (0.45 ft/yr)] 

by C.F. Hostrup and Associates, 1955.

2Value is average of minimum and maximum estimated 

recharge from wastewater seepage for 1993. Values listed in table 

3.

3Value calculated by multiplying 1993 lawn area (33 acres) 

by the consumptive use for grass (6.3 ft/yr; Sandra Owen-Joyce, 

U.S. Geological Survey, oral commun., 1996) and assuming that 

the irrigation efficiency is 50 percent (twice as much water is 

applied than is used).

4Value calculated in text using Darcy's law and 1994 waterlevel data.

134 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 5. Minimum, maximum, and average of dissolved-solids and nitrate concentrations in samples collected for selected 

ground-water sites at Fort Irwin National Training Center, California, 1993-96

[mg/L, milligram per liter, <, actual value is less than value shown]

Number 

State well number of

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4B6LYS

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E-4G1

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

13N/3E-4Q3LYS

13N/3E-4Q4LYS

13N/3E-4Q5LYS

13N/3E-4Q6LYS

13N/3E-5G1

13N/3E-8B1

13N/3E-9B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

samples

3

3

3

2

1

7

7

6

4

4

2

6

4

1

1

3

1

3

1

1

1

1

1

1

4

4

4

4

4

1

1

6

5

3

3

1

1

Dissolved-solids concentration 

(mg/L)

Minimum

1,010

852

1,520

1,210

720

526

491

744

536

480

610

862

1,900

547

524

528

482

2,250

6,380

4,930

2,460

2,140

453

465

455

1,320

492

506

1,040

794

443

540

562

610

433

595

516

Maximum

1,080

872

1,530

1,270

720

668

520

968

630

532

688

944

2,290

547

524

552

482

3,030

6,380

4,930

2,460

2,140

453

465

488

1,560

506

523

1,080

794

443

561

628

676

542

595

516

Average

1,047

863

1,523

1,240

720

557

503

869

565

503

649

916

2,093

547

524

542

482

2,533

6,380

4,930

2,460

2,140

453

465

472

1,440

498

512

1,060

794

443

552

591

644

493

595

516

Number 

of

samples

2

2

2

3

5

6

5

6

3

4

4

7

5

2

2

3

1

4

11

12

12

12

1

1

5

5

3

4

4

1

1

6

5

3

3

1

1

Nitrate as nitrogen 

(mg/L)

Minimum

10

7.5

7.7

17

2.4

2.3

2.8

1.4

1.2

2.3

.77

7.6

18

2.5

2.7

2.6

2.7

22

1.8

3.5

11

5.6

3.6

2.5

2.5

1.8

2.4

2.8

6.4

<.05

1.5

.2

.18

2.6

3.2

.24

2.9

Maximum

11

7.5

9.2

22

4.7

3.5

3.1

12

1.9

2.5

3.3

17

22

2.8

2.9

3.1

2.7

30

34

15

32

33

3.6

2.5

2.9

17

2.5

3.1

7.6

<.05

1.5

.30

.38

2.7

3.8

.24

2.9

Average

11

7.5

8.5

19

3.5

2.6

2.9

8.9

1.5

2.4

2.5

13

20

2.6

2.8

2.9

2.7

25

11

10

24

20

3.6

2.5

2.7

6.4

2.5

2.9

7.0

<.05

1.5

.27

.31

2.6

3.5

.24

2.9

Table 5 135
Table 5. Minimum, maximum, and average of dissolved-solids and nitrate concentrations in samples collected for selected 

ground-water sites at Fort Irwin National Training Center, California, 1993-96 Continued

Number 

State well number of

14N/3E-32H1

14N/3E-32J1

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

14N/3E-33B1

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33G1

14N/3E-33G2

14N/3E-33G3

14N/3E-33G4

14N/3E-33H1

14N/3E-33H2

14N/3E-33H3

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

samples

2

2

4

5

5

5

4

3

2

2

2

2

2

2

3

2

1

3

1

3

2

1

1

1

1

1

2

2

1

2

3

1

1

6

2

2

3

Dissolved-solids concentration 

(mg/L)

Minimum

488

449

491

502

499

474

898

513

555

692

834

702

545

555

578

708

884

504

557

545

530

535

553

538

536

577

550

584

565

684

656

496

1,000

750

666

568

557

Maximum

554

532

575

627

686

511

944

589

560

728

854

704

574

566

1,020

818

884

545

557

922

676

535

553

538

536

577

558

588

565

708

700

496

1,000

822

670

574

565

Average

521

490

548

548

586

496

916

561

558

710

844

703

560

561

735

763

884

529

557

693

603

535

553

538

536

577

554

586

565

696

685

496

1,000

772

668

571

560

Number 

of

samples

2

2

4

5

5

5

3

4

2

2

2

2

2

2

3

2

1

5

1

3

2

1

1

1

1

1

4

5

1

5

5

1

1

7

4

5

5

Nitrate as nitrogen 

(mg/L)

Minimum

2.1

2.8

4.7

1.2

1.6

2.4

<.05

1.9

.25

11

9.4

<.05

.10

.40

5.9

6.5

8.4

7.4

5.1

4.9

4.7

1.2

4.1

5.5

5.7

5.1

7.3

<.05

5.4

4.0

3.9

3.0

8.5

2.9

6.4

<05

4.5

Maximum

2.5

3.0

5.3

1.3

2.2

2.9

2.2

8.6

.45

11

9.5

<.05

.14

.42

8.3

6.9

8.4

7.7

5.1

5.5

5.4

1.2

4.1

5.5

5.7

5.1

7.5

6.3

5.4

4.4

4.2

3.0

8.5

4.8

6.9

6.7

4.8

Average

2.3

2.9

5.1

1.2

1.9

2.7

.85

6.6

.35

11

9.4

<05

.12

.41

7.4

6.7

8.4

7.5

5.1

5.1

5.0

1.2

4.1

5.5

5.7

5.1

7.4

4.9

5.4

4.2

4.0

3.0

8.5

3.6

6.6

5.4

4.6

136 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 6. Water-quality data of wastewater effluent at the wastewater-treatment facility at Fort Irwin National Training Center, 

California

[All data were analyzed at U.S. Geological Survey laboratories. Locations of sites are shown in figure 2. Numbering systems for sites are explained in text 

Altitude of land surface in feet above sea level, ft, foot; uS/cm, nricrosiemen per centimeter, °C, degrees Celsius; mg/L, milligram per liter, fig/L, microgram per liter. , no data]

DHP"

Specific Specific

Local Identifier Station number Date

(nS/cm) OtSton)

water 

whole

Inflow to wastewater-treatment facility 

(before oxidation ponds)

Outflow from wastewater-treatment facility 

(after oxidation ponds

351508116394901 07-14-93 0900 2,380 1,270 1,280 7.3 6.9 

351503116394901 07-14-93 0910 2,380 1,350 1,420 9.2 8.4

Temperaradium Magne- e«Hi,,m Potas- Carbon- C *IB So*"m'

Local Identifier

slum, ate water

Alkalinitywat

(°C) , able able (mg/L as *'"»"- B* (mg/L as 

(mg/L) (mg/L) COg) CaGOg)

Inflow to wastewater-treatment facility 

(before oxidation ponds)

Outflow from wastewater-treatment facility 

(after oxidation ponds)

07-14-93 

07-14-93

28.0 

28.0

29

27

6.1 

5.6

180 

230

<0.1 291 

<.l 62 59 259

Local Identifier

Alkalinity Solids,

Alkalinity watwhtot Sulfate Chloride, Fluoride, Silica, residue at

Date lab (mg/L It field disolved dissolved dissolved dissolved 180 °C,

a«CaCO3) (mg/L as (mg/L) (mg/L) (mg/L) (mg/L) dissolved

___________CaC03) ____________________(mg/L)

Inflow to wastewater-treatment facility 07-14-93 440 291 120 110 5.3 59 624 

(before oxidation ponds)

Outflow from wastewater-treatment facility 07-14-93 272 259 170 140 6.5 66 826 

(after oxidation ponds)

Local Identifier

Nitrogen, Nitrogen Ntoogen, Nitrogen, Nitrogen, N^n' p

±? M°o2+ TIT 0»T C *«ganic rustotal total NO3 total total " . . ..

(mg/L) (mg/L) (mg/L as N) (mg/L) (mg/L) ££} tmg/L)

Inflow to wastewater-treatment facility 

(before oxidation ponds)

Outflow from wastewater-treatment facility 

(after oxidation ponds)

07-14-93 0.00 

07-14-93 .00

0.060 0.060

.110 .110

26.0

11.0

18

17

44

28

7.60

5.50

Local identifier

Inflow to wastewater-treatment facility

(before oxidation ponds)

Outflow from wastewater-treatment facility

(after oxidation ponds)

PhorphoDate ru* 0Tjho

(mg/L)

07-14-93 5.00

07-14-93 4.40

Boron, Iron, total

rile. roonunr '

018- recoverOig/L) (ug/L)

1,300 2,200

1,800 140

Mangaable

70

30

Methyiene 

1 blue

active substance 

(mg/L)

4.9

.33

2H/1 H 

stable

isotope

ratio per 

mil

-93.3

-80.4

180,160

stable

isotope

ratio per 

mil

-11.64

-8.64

Table 6 137
Table 7. Water-quality data for core samples from Irwin 

Basin at Fort Irwin National Training Center, California

[ft, foot; (iS/cm, microsiemens per centimeter. Well locations are shown on 

figure 4]

Site name Depth of sample

___________ ________ QiS/cm)

GB1 10 403

STP3R 20 385

STP7 40 170

STP8 25 417

STP8 40 1,485

STP9 15 1,968

STP11 15 1,530

STP11 25 1,643

138 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 8. Tritium, carbon-14, carbon-13, deuterium, and oxygen-18 in ground-water samples in Irwin Basin at Fort Irwin National 

Training Center, California

[All data were analyzed at U.S. Geological Survey laboratories. Location of sites shown in figure 2. Numbering systems for sites are explained in text ft, 

foot; TU, tritium units; , no data; <, actual value is less than value shown]

State well 

number

13N/3E-4B1

13N/3E-4B2

13N/3E-4B3

13N/3E-4B4

13N/3E-4C1

13N/3E-4C2

13N/3E-4C3

13N/3E-4D1

13N/3E-4D2

13N/3E-4D3

13N/3E4G1

Date

05-26-94

08-24-94

05-26-94

08-24-94

05-26-94

08-24-94

02-14-95

11-02-95

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

07-28-93

09-16-93

11-05-93

05-24-94

08-25-94

07-28-93

09-16-93

11-05-93

05-26-94

09-22-94

08-25-93

05-24-94

08-24-94

08-26-93

05-24-94

08-24-94

08-25-93

09-24-93

05-24-94

09-22-94

09-23-93

11-04-93

11-15-94

Depth 

(ft)

240

180

130

97

320

220

150

320

250

170

Tritium Carbon-14, Carbon-13 

(TU) percent modern (per mil)

 

 

 

 

 _

_ _ _

 

 

 

<0.2 13.5 -10.1

 _

 

 

 

<.2 13.2 -9.0

_ _ _

 

 

 

.2 -9.5

__ _ _

 

 

 

 11.9 -6.6

 _

 

 13.3 -8.3

 

 _

 

 

 

.6 

 

 _ _

Deuterium 

(per mil)

-89.8

-90.8

-91.2

-92.4

-87.1

-86.6

-73.9

-75.7

-94.3

-94.6

-35.8

-94.3

-96.1

-32.3

-92.4

-93.9

-94.3

-93.4

-89.3

-89.8

-89.3

-90.0

-88.7

-95.0

-95.8

-95.3

-94.1

-95.2

-94.4

-90.0

-92.3

-89.6

-30.5

-90.6

-92.4

_

Oxygen-18 

(per mil)

-10.77

-10.66

-11.14

-11.16

-10.34

-9.92

-7.35

-7.52

-11.76

-11.82

-11.77

-11.69

-11.64

-11.66

-11.69

-11.70

-11.57

-11.54

-10.79

-10.97

-10.76

-11.04

-11.18

-11.78

-11.64

-11.69

-11.68

-11.65

-11.61

-11.26

-11.26

-11.09

-11.23

-11.13

-11.44

__

Tables 139
Table 8. Tritium, carbon-14, carbon-13, deuterium, and oxygen-18 in ground-water samples in Irwin Basin at Fort Irwin 

National Training Center, California Continued

State well 

number

13N/3E-4K1

13N/3E-4K2

13N/3E-4K3

13N/3E-4K4

13N/3E-4M1

13N/3E-4Q2

13N/3E-5G1

13N/3E-8B1

13N/3E-10D1

13N/3E-10E1

13N/3E-10E2

13N/3E-10E3

13N/3E-11NS1

14N/3E-31K1

14N/3E-32B1

14N/3E-32B2

14N/3E-32B3

14N/3E-32F1

14N/3E-32F2

14N/3E-32F3

14N/3E-32H1

14N/3E-32J1

Date

11-04-93

02-23-95

02-23-95

02-23-95

05-20-93

02-24-95

11-28-95

07-28-93

07-20-94

11-15-94

09-22-93

05-25-94

08-25-94

09-23-93

05-25-94

08-25-94

09-23-93

05-25-94

08-25-94

06-30-93

05-25-94

05-21-93

09-22-93

07-19-94

09-22-94

12-20-94

06-02-93

09-22-93

07-19-94

09-22-94

09-23-93

07-20-94

09-23-94

06-02-93

11-03-95

02-22-95

02-22-95

05-21-93

05-18-94

Depth 

(ft)

238

190

135

351

90

450

255

243

170

60

410

630

540

300

494

460

290

490

340

Tritium 

(TU)

__

__

__

<0.2

__

<.2

<.2

__

Carbon-14, 

percent modern

. _ _

9.0

10.4

_^_

92.6

__

__

6.2

__

Carbon-13 

(per mil)

__

-8.6

-8.5

__

-10.2

__

-8.3

-8.7

-9.4

-9.6

-95.3

-92.8

-92.7

__

Deuterium 

(per mil)

-83.8

-93.7

-93.3

-93.7

-91.6

-83.9

-75.0

-90.1

-91.7

-94.9

-95.6

-94.9

-94.8

-94.4

-94.5

-77.2

-76.8

-77.9

-90.5

-91.7

-95.2

-96.5

-97.9

-96.3

_

-96.4

-96.5

-97.1

-95.8

-93.5

-11.48

-11.64

-94.3

-11.36

-95.4

-96.2

-95.2

-93.4

Oxygen-18 

(per mil)

-9.27

-11.52

-11.38

-11.32

-11.61

-9.39

-7.58

-11.24

-11.47

-11.87

-11.74

-11.75

-11.70

-11.75

-11.74

-8.23

-8.07

-8.08

-11.43

-11.23

-11.75

-11.8

-11.57

-11.69

__

-11.73

-11.78

-11.57

-11.72

-11.68

-11.73

-11.53

-11.58

-11.61

-11.43

140 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 8. Tritium, carbon-14, carbon-13, deuterium, and oxygen-18 in ground-water samples in Irwin Basin at Fort Irwin 

National Training Center, California Continued

State well 

number

14N/3E-32K1

14N/3E-32K3

14N/3E-32K4

14N/3E-32K5

14N/3E-32K6

14N/3E-32M1

14N/3E-32N1

14N/3E-32N2

14N/3E-32N3

14N/3E-32P2

14N/3E-32P3

14N/3E-32P4

14N/3E-32P5

14N/3E-32P6

14N/3E-32Q3

14N/3E-33A1

Date

06-02-93

07-19-94

07-20-94

05-04-93

09-14-93

05-17-94

08-23-94

05-04-93

09-15-93

05-17-94

08-23-94

05-05-93

09-15-93

05-18-94

08-23-94

05-05-93

09-15-93

05-18-94

08-23-94

06-02-93

09-15-93

11-29-95

11-29-95

11-29-95

07-21-94

09-15-94

07-21-94

09-20-94

07-22-94

09-15-94

07-20-94

09-14-94

05-01-95

09-20-94

05-01-95

05-11-95

07-19-94

11-08-94

Depth 

(ft)

551

440

355

290

230

520

410

270

904

730

580

405

270

185

Tritium Carbon-14, Carbon-13 

(TU) percent modern (per mil)

 

 

 

 

<0.2 6.3 -9.5

_ _ _

 

 

<.2 10.7 -9.2

 _

 _ _

 

<2 18.0 -9.4

 

 _

_ __ __

.7 21.9 -21.1

 

 

 _

.2 

 

 

 

 _

 5.7 -7.4

 

 

 

 _

_ __ __

 

<.2 

 

2.4 

_ _ _

 

 _ _

Deuterium 

(per mil)

-92.4

-91.8

-93.0

-95.7

-95.5

-96.2

-96.8

-94.2

-94.9

-95.9

-95.0

-92.9

-92.8

-92.9

-94.3

-86.1

-86.7

-85.4

-87.4

-90.2

-90.6

-95.8

-88.6

-88.0

-96.4

-96.2

-96.8

-96.4

-98.1

-97.5

-92.2

-89.7

-92.0

-78.5

-81.4

-89.1

-90.6

__

Oxygen-18 

(per mil)

-11.41

-11.19

-11.17

-11.85

-11.97

-11.83

-11.78

-11.91

-11.83

-11.77

-11.74

-11.72

-11.72

-11.51

-11.44

-10.51

-10.48

-10.30

-10.33

-11.18

-11.10

-11.80

-10.67

-10.08

-11.71

-11.84

-11.71

-11.82

-12.02

-12.12

-11.45

-11.06

-11.21

-9.13

-9.24

-10.46

-11.25

_

Tables 141
Table 8. Tritium, carbon-14, carbpn-13, deuterium, and oxygen-18 in ground-water samples in Irwin Basin at Fort Irwin 

National Training Center, California Continued

State well 

number

14N/3E-33E2

14N/3E-33E3

14N/3E-33F1

14N/3E-33H1

14N/3E-33H2

14N/3E-33J1

14N/3E-33J2

14N/3E-33N1

14N/3E-33Q1

14N/3E-33R1

14N/3E-34D1

14N/3E-34M1

14N/3E-34M2

Date

05-25-94

09-21-94

09-21-94

11-30-95

05-25-94

11-10-94

11-14-94

11-14-94

07-20-94

11-09-94

07-13-93

11-02-95

07-13-93

11-04-93

11-09-94

11-14-94

07-20-94

Depth 

(ft)

220

175

274

172.10

190.43

116.96

116

--

330

168

_

201.36

176.12

116

Tritium Carbon-14, Carbon-13 Deuterium 

(TU) percent modern (per mil) (per mil)

 -92.9

 -93.9

 -91.7

 -92.1

 -92.7

 

 _ _ 

^_ ^_ ^_ _ _

 -93.9

 

 -91.1

 -89.3

 -91.8

 -92.0

 

 

 -94.9

Oxygen-18 

(per mil)

-11.52

-11.62

-11.37

-11.36

-11.46

^_

-11.45

-11.28

-10.79

-10.99

-11.13

-11.49

142 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 9. Lithologic log for borehole of monitoring site SP1 (13N/3E-4B1, -4B2, -4B3) at Fort Irwin National Training Center, 

California

[ft, foot Altitude of land surface approximately 2,390 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, February 23-24,1994. Total 

depth drilled 260 ft Perforated intervals 220-240,160-180, and 110-130 ft]

Depth (ft) ^_ , M

 Description From To

Site SP1 (13N/3E-4B1, -4B2, -4B3)

Cuttings

0 20 Sand, fine to coarse, with occasional granules; poorly sorted; subangular to subrounded; light brown (SYR 5/6) to 

moderate brown (5YR 4/4).

20 40 Sand, very fine to coarse, with granules and pebbles; very poorly sorted; subangular to subrounded; some mafic 

minerals and mica; moderate brown (SYR 4/4).

40 60 Sand, fine to coarse, with occasional granules and pebbles; poorly sorted; subangular to subrounded; moderate brown 

(SYR 4/4).

60 80 Sand, fine to very coarse, with some granules and pebbles; poorly sorted; angular to subrounded; occasional rock 

fragments; moderate brown (SYR 4/4).

80 90 Sand, fine to coarse, with some granules and pebbles, some clay; poorly sorted; subangular to subrounded; moderate 

brown (SYR 4/4).

90 120 Sand, fine to coarse, with clay and some granules; poorly sorted; subangular to subrounded; moderate brown 

(SYR 4/4).

120 140 Sand, fine to coarse, with clay and some granules; poorly sorted; subangular to subrounded; moderate brown 

(SYR 4/4).

140 160 Sand, fine to medium; moderately sorted; subangular to subrounded; some mafic minerals and mica; moderate brown 

(SYR 4/4).

160 190 Sand, fine to medium, with clay, occasionally coarse grains; moderately sorted; subangular to subrounded; mafic 

minerals and mica; moderate yellowish brown (10YR 5/4).

190 200 Sand, fine to coarse, with some clay, occasional granules and pebbles; poorly sorted; angular to subangular; moderate 

yellowish brown (10YR 5/4).

200 215 Weathered granitic rock, with some sand; moderate yellowish brown (10YR 5/4) to pale yellowish brown (10YR 5/4). 

215 260 Weathered granitic rock with some sand; moderate yellowish brown (10YR 5/4)._________________

Table9 143
Table 10. LJthologic log for borehole of monitoring site NIT3 (13N/3E-4B4, -4B5LYS, -4B6LYS, -4B7LYS, -4B8LYS) at Fort 

Irwin National Training Center, California

[ft, foot. Altitude of land surface approximately 2,380 ft above sea level Drilled by U.S. Geological Survey using air rotary, November 10,1994. Total 

depth drilled 99 ft. Water table well perforated interval 92-97 ft. Lysimeter depths 68,46,35, and 15 ft]

Depth (ft) I ~~ 

 c ^ Description From To

Site NTT3 (13N/3E-4B4, -4B5LYS, -4B6LYS, -4B7LYS, -4B8LYS)

Cuttings

0 6 Sandy, silty gravel, medium to coarse; subrounded; pale yellowish brown (10YR 6/2).

6 8 Core: Silty, sandy gravel, medium to coarse; poorly sorted; subangular to subrounded; moderate yellow brown 

(10YR5/4).

8 16 Silty sand, medium to very coarse, some gravel; poorly sorted; subrounded; moderate yellow brown (10YR 5/4).

16 18 Core: Sandy, silty gravel, fine to coarse; poorly sorted; subangular, moderate yellow brown (10YR 5/4).

18 26 Sandy gravel, coarse to very coarse; poorly sorted; rounded; moderate yellow brown (10YR 5/4).

26 28 Core: Silty sand, medium to coarse, some gravel; poorly sorted; subangular; pale yellow brown (10YR 6/2) to 

moderate yellow brown (10YR 5/4).

28 36 Silty sand, medium to very coarse, some gravel; very poorly sorted; subrounded to rounded; moderate yellow brown 

(10YR 5/4).

36 38 Core: Silty sand, medium to coarse, trace gravel; poorly sorted; subangular, pale yellow brown (10YR 6/2).

38 57 Silty gravel, medium to very coarse, trace sand; very poorly sorted; subangular, moderate yellow brown (10YR 5/4).

57 59 Core: Silty sand, medium to coarse, some gravel; poorly sorted; subangular, moderate yellow brown (10YR 5/4).

59 77 Sandy gravel, medium to coarse, some silt; poorly sorted; subrounded; moderate yellow brown (10YR 5/4).

77 79 Core: Silt, fine; well sorted; subrounded; moderate yellow brown (10YR 5/4); dark angular lithic fragments within silt 

sediments.

79 97 Sandy gravel, coarse to very coarse; poorly sorted; subrounded; dark yellow brown (10YR 4/2).

97___99 Core: Sandy gravel, coarse to very coarse; poorly sorted; subrounded; dark yellow brown (10YR 4/2).________

144 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 11. Lithologic log for borehole of monitoring site WC1 (13N/3E-4C1, -4C2, -4C3) at Fort Irwin National Training Center, 

California

[ft, foot. Altitude of land surface 2399.74 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, June 29-July 2,1993. Total depth drilled 

340 ft Perforated intervals 300-320,200-220, and 130-150 ft]

Depth (ft) I ~~ 

 r x ' Description From To

Site WC1 (13N/3E-4C1, -4C2, -4C3) 

Cuttings

0 20 Sand, fine to very coarse, and gravel, with small amount of silt; poorly sorted; subrounded; light brown (SYR 5/6) to 

moderate yellowish brown (10YR 5/4).

20 40 Sand, fine to very coarse, and gravel, with small amount of silt; poorly sorted; subrounded; light brown (SYR 5/6) to 

moderate yellowish brown (10YR 5/4).

40 60 Sand, coarse to very coarse, and some gravel-sized rock fragments; moderately well sorted; subangular, moderate 

yellowish brown (10YR 5/4).

60 80 Sand, coarse to very coarse, and gravel; moderately well sorted; subangular, moderate yellowish brown (10YR 5/4).

80 100 Sand, fine to very coarse, and gravel, with occasional pebbles, some silt, rock fragments; poorly sorted; subangular, 

moderate yellowish brown (10YR 5/4).

100 120 Sand, fine to very coarse, some gravel and rock fragments; poorly sorted; subangular, moderate yellowish brown 

(10YR 5/4).

120 140 Sand, fine to very coarse, with gravel, some clay; poorly sorted; subrounded; light brown (SYR 5/6) to moderate 

yellowish brown (10YR 5/4).

140 160 Sand, fine to very coarse, with gravel, some silt; poorly sorted; subangular to subrounded; moderate yellowish brown 

(10YR5/4).

160 180 Sand, fine to very coarse, with some gravel, some clay; poorly sorted; subangular, moderate yellowish brown 

(10YR5/4).

180 200 Clay, with some fine to coarse sand; moderate yellowish brown (10YR 5/4).

200 220 Clay, with some fine to coarse sand; moderate yellowish brown (10YR 5/4).

220 240 Fractured rock consisting of quartz, mafic minerals, fragments of granitic rock; dark yellowish orange (10Y 6/6).

240 260 Fractured rock consisting of pieces of granitic rock, quartz, mafic minerals; dark yellowish orange (10YR 6/6) to 

grayish orange (10YR 7/4).

260 280 Fractured granitic rock consisting of quartz, mafic minerals, mica; grayish orange (10YR 7/4) to olive gray (5 Y 4/1).

280 300 Fractured rock consisting of granitic fragments, quartz; grayish orange (10YR 7/4) and dark yellowish orange 

(10YR 6/6).

300 320 Fractured rock consisting of granitic fragments, quartz; grayish orange (10YR 7/4) and dark yellowish orange 

(10YR 6/6).

320 340 Clay, with some coarse grains and subangular sand. __ ________________

Table 11 145
Table 12. Lithologic log for borehole of monitoring site WC2 (13N/3E-4D1, -4D2, -4D3) at Fort Irwin National Training Center, 

California

[ft, foot. Altitude of land surface 2,419.85 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, August 11-13,1993. Total depth drilled

320 ft. Perforated intervals 300-320,230-250, and 150 ft]

^ _ __

' Description 

From To____________________________________________________________

Site WC2 (13N/3E-4D1, -4D2, -4D3)

Cuttings

0 20 Sand, fine to very coarse, with rock fragments; poorly sorted; subrounded to subangular, moderate brown (SYR 4/4) to

moderate yellowish brown (10YR 5/4)

20 40 Sand, fine to very coarse, with rock fragments; poorly sorted; subrounded to subangular; moderate brown (SYR 4/4) to 

moderate yellowish brown (10YR 5/4).

40 SO Sand, fine to coarse, with some gravel-sized rock fragments; poorly sorted; subrounded to subangular, dark yellowish 

brown (10YR 4/2) to moderate yellowish brown (10YR 5/4).

50 80 Sand, fine to very coarse, with some gravel, occasional rock fragments; poorly sorted; subrounded to subangular; dark 

yellowish brown (10YR 4/2) to moderate yellowish brown (10YR 5/4).

80 100 Sand, fine to very coarse, with some gravel, occasional rock fragments; poorly sorted; subrounded to subangular, dark 

yellowish brown (10YR 4/2) to moderate yellowish brown (10YR 5/4).

100 120 Sand, fine to very coarse, with occasional rock fragments; poorly sorted; subrounded to subangular; moderate yellowish brown (10YR 5/4).

120 140 Sand, fine to very coarse, with occasional granules; poorly sorted; subrounded to subangular; dark yellowish brown 

(10YR4/2).

140 160 Sand, fine to very coarse, with occasional granules and rock fragments; poorly sorted; subrounded to subangular; dark 

yellowish brown (10YR 4/2).

160 180 Sand, fine to very coarse, with occasional granules; poorly sorted; subrounded to subangular, dark yellowish brown 

(10YR4/2).

180 200 Sand, fine to coarse, and silt; poorly sorted; subrounded; moderate yellowish brown (10YR 5/4). 

200 220 Silt, and some sand, fine to coarse, with occasional granules; moderate yellowish brown (10YR 5/4).

220 240 Sand, fine to very coarse, with some silt, occasional granules, and rock fragments; poorly sorted; subangular to subrounded; dark yellowish brown (10YR 4/2).

240 260 Sand, very coarse to fine, with some silt, occasional gravel; moderately sorted; subangular to subrounded; moderate 

yellowish brown (10YR 5/4).

260 265 Sand, very coarse to fine, with some silt, some rock fragments; moderately sorted; subangular to subrounded; moderate 

yellowish brown (10YR 5/4) to dark yellowish brown (10YR 4/2).

265 300 Sand, coarse to very coarse, with occasional granules, rock fragments; moderately well sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4) to dark yellowish brown (10YR 4/2).

300 320 Sand, coarse to very coarse, with some granules, rock fragments; moderately well sorted; subrounded to angular, dark 

__________yellowish brown (10YR 4/2).____________ _____________________

146 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 13. Lithologic log for borehole of monitoring site NIT2 (13N/3E-4K2, -4K3, -4K4) at Fort Irwin National Training Center, 

California

[ft, foot. Altitude of land surface approximately 2,385 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, November 2-5, 1994. Total 

depth drilled 238 ft Perforated intervals 228-238, 170-190, and 115-135 ft]

Description

From To

NTT2 (13N/3E-4K2, -4K3, -4K4) 

Cuttings 

0 20 Gravelly sand, medium to coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4); quartz.

20 40 Sandy gravel, coarse to very coarse; very poorly sorted; subangular to angular, moderate yellowish brown 

(10YR5/4).

40 60 Slightly silty sand, medium to coarse, some gravel; well to poorly sorted; subrounded; moderate yellowish brown 

(10YR 5/4).

60 70 Slightly silty, gravelly sand, fine to medium; very poorly sorted; subangular, dark yellowish orange (10YR 6/6) to 

moderate yellowish brown (10YR 5/4).

70 80 No sample collected. Clay layer.

80 100 Sand, medium, trace gravel; well sorted; subangular to angular, moderate yellowish brown (10YR 5/4).

100 120 Silty sandy gravel, fine to very coarse; poorly sorted; subrounded; grayish orange (10YR 7/4) to dark yellowish 

orange (10YR 6/6).

120 140 Sand, medium to coarse, trace gravel; well sorted; angular to subangular, moderate yellowish brown (10YR 5/4).

140 160 Sandy silt, fine to medium; well sorted; subrounded; pale yellowish brown (10YR 672).

160 180 Sandy silt; fine to medium; well sorted; subrounded; moderate yellowish brown (10YR 5/4).

180 205 Silty sandy gravel, medium to very coarse; poorly sorted; angular to subangular; dark yellowish orange (1OYR 6/6) to 

moderate yellowish brown (10YR 5/4).

205 220 No sample collected. Ground-up bedrock, possibly biotite schist. 

220 238 No sample collected. Ground-up granitic bedrock and biotite schist.

Table 13 147
Table 14. Lithologic log for borehole of monitoring site NIT1 (13N/3E-4Q2, -4Q3LYS, -4Q4LYS, -4Q5LYS, -4Q6LYS) at Fort 

Irwin National Training Center, California

[ft, foot. Altitude of land surface approximately 2,385 ft above sea level. Drilled by U.S. Geological Survey using air odex, November 3,1994. Total depth 

drilled 97 ft. Water table well perforated interval 85-90 ft. Lysimeter depths 75,53.5,35, and 15 ft]

Depth (ft) Description 

NTTl (13N/3E-4Q2, -4Q3LYS, -4Q4LYS, -4Q5LYS, -4Q6LYS)

Cores

7 Sandy, silty gravel, medium to very coarse; poorly sorted; subrounded; moderate brown (SYR 4/4). 

17 Silty gravel, medium to very coarse; poorly sorted; subangular; moderate yellowish brown (10YR 5/4). 

20 Silty sand, fine to medium; poorly sorted; subrounded to rounded; moderate yellowish brown (10YR 5/4).

24 Silty sand, some gravel; fine to coarse; very poorly sorted; some subangular, most subrounded; moderate yellowish 

brown (10YR 5/4).

28 Sandy silty gravel, medium to very coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4).

30 Silty sandy gravel, medium to very coarse; poorly sorted; subrounded to subangular, moderate yellowish brown (10YR 

5/4).

38 Sandy silty gravel, medium to very coarse; poorly sorted; subrounded; moderate yellowish brown (10YR 5/4). 

48 Silty sand, some gravel; medium to coarse; poorly sorted; subrounded; moderate yellowish brown (10YR 5/4).

58 Silty sand, some gravel; medium to very coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4) to 

dark yellowish orange (10YR 6/6).

66 Sandy silty gravel, fine to very coarse; poorly sorted; subangular; grayish orange (10YR 7/4). 

79 Sandy silty gravel, fine to very coarse; poorly sorted; subangular; grayish orange (10YR 7/4).

148 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 15. Lrthologic log for borehole of monitoring site AD1 (13N/3E-8B1) at Fort Irwin National Training Center, California

[ft, foot Altitude of land surface approximately 2,500 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, March 4-6,1994. Total 

depth drilled 277 ft. Perforated interval 235-255 ft]

Depth (ft)

Description

From To

AD1 (13N/3E-8B1)

Cuttings

0 20 Sand, fine to coarse with some granules and pebbles; poorly sorted; angular to subrounded; moderate yellowish 

brown (10YR 5/4).

20 40 Sand, fine to coarse, with some granules and pebbles; poorly sorted; angular to subrounded; moderate yellowish 

brown (10YR 5/4).

40 60 Sand, fine to coarse, with some clay, occasional granules and pebbles; poorly sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

60 85 Sand, fine to medium, with clay; moderately sorted; occasional pebbles, subangular to subrounded; moderate yellowish brown (10YR 5/4).

85 100 Sand, fine to coarse, with some granules and pebbles; poorly sorted; subangular to subrounded; moderate yellowish 

brown (10YR 5/4).

100 120 Sand, fine to coarse, with some granules and pebbles; poorly sorted; subangular to subrounded; some mica and mafic 

minerals; moderate yellowish brown (10YR 5/4).

120 140 Sand, fine to medium, with occasional granules and pebbles, some clay; moderately sorted; subangular to subrounded; some mafic minerals and mica; dark yellowish brown (10YR 4/2).

140 160 Sand, fine to medium, with occasional granules and pebbles; moderately sorted; subangular to subrounded; mafic 

minerals and mica; dark yellowish brown (10YR 4/2).

160 175 Sand, fine to medium, with some granules and pebbles; moderately sorted; subangular to subrounded; mafic minerals 

and mica; dark yellowish brown (10YR 4/2).

175 200 day, with sand, fine to coarse, occasional pebbles; subangular to subrounded; light olive gray (5Y 5/2).

200 220 day, with sand and ground-up granitic rock; grayish olive (10Y 4/2).

220 240 Clay, with ground-up granitic rock; grayish olive (10Y 4/2).

240 255 Clay, with sand, fine to medium, and some ground-up granitic rock; subangular to subrounded; moderate olive brown 

(5Y4/4).

255 277 Ground-up granitic rock; dark greenish gray (5GY 4/1).

Table 15 149
Table 16. Lrthologic log for borehole of monitoring site WC3 (13N/3E-10E1, -10E2, -10E3) at Fort Irwin National Training 

Center, California

[ft, foot. Altitude of land surface 2,342.65 ft above sea level Drilled by U.S. Geological Survey using mud rotary, August 13-15,1993. Total depth drilled 

260 ft. Perforated intervals 223-243,150-170, and 40-60 ft] 

_____

Description

From To

WC3 (13N/3E-10E1, -10E2, -10E3) 

Cutting*

0 20 Sand, fine to very coarse, with occasional granules and pebbles, some silt; poorly sorted; subrounded; moderate yellowish brown (10YR 5/4).

20 40 Sand, fine to very coarse, with some granules and pebbles, some rock fragments; poorly sorted; subrounded to subangular, moderate yellowish brown (10YR 5/4).

40 65 Sand, fine to very coarse, granules, pebbles, silt; poorly sorted; subrounded; light olive brown (5Y 5/6).

65 80 Clay, with some fine sand, granules, silt; subangular gravel; light olive brown (5Y 5/6) to yellowish gray (5Y 7/2).

80 100 Clay, with some fine sand, granules, silt; subangular gravel; light olive brown (5Y 5/6) to yellowish gray (5Y 7/2).

100 125 Sand, very fine to coarse, some granules, clay; poorly sorted; subrounded to subangular, dark yellowish brown (10YR 

4/2).

125 140 Clay, with some fine to coarse sand; moderate yellowish brown (10YR 5/4).

140 160 Clay, with some fine to coarse sand, occasional granules; sand is subrounded; dark yellowish brown (10YR 4/2).

160 170 Sand, fine to very coarse, and gravel, granules to pebbles; poorly sorted; multicolored angular rock fragments; sand is 

subrounded; dark yellowish brown (10YR 4/2).

170 200 Clay, with some very fine to coarse sand, occasional granules; dark yellowish brown (10YR 4/2).

200 220 Sand, very fine to very coarse, with granules and pebbles, some silt; very poorly sorted; subrounded to subangular, 

dark yellowish brown (10YR 4/2).

220 250 Sand, fine to very coarse, with granules and pebbles; very poorly sorted; subrounded to subangular, abundance of 

mafic minerals; dark yellowish brown (10YR 4/2).

250 260 Fractured bedrock; sample consists of sand, fine to very coarse, granules, rock fragments; poorly sorted; subrounded 

to subangular, abundance of mafic minerals; dark yellowish brown (10YR 4/2).

150 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 17. LJthologic log for borehole of monitoring site NH1 (14N/3E-32B1, -32B2, -32B3) at Fort Irwin National Training 

Center, California

[ft, foot. Altitude of land surface approximately 2,530 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, March 3-7,1993. Total depth 

drilled 660 ft Perforated intervals 610-630,520-540, and 280-300 ft]

Depth (ft)

Description

From To

NH1 (14N/3E-32B1, -32B2, -32B3)

Cuttings

0 20 Gravel, granules to large pebbles, with sand, medium to coarse; poorly sorted; sand, subrounded to subangular; gravel, 

subangular to angular, quartz, biotite, volcanic and granitic rock fragments (rhyolite?); grayish brown (SYR 3/2).

20 40 Gravel, granules to large pebbles, with sand, medium to coarse; poorly sorted; sand, subrounded; gravel, subrounded to 

angular, grayish brown (SYR 3/2).

40 60 Gravel, granules to pebbles, and sand, fine to coarse; poorly sorted; subrounded to angular, grayish brown (SYR 3/2).

60 80 Sand, medium to coarse, with some fine sand and gravel, granule- to pebble-sized; poorly sorted; rounded to subangular, quartz, mica, mafic fragments, volcanic fragments; dark yellowish brown (10YR 4/2) to moderate yellowish 

brown (10YR 5/4).

80 100 Sand, fine to medium, with some coarse and very coarse grains, possible silt; moderately poorly sorted; subrounded; 

moderate yellowish brown (10YR 5/4).

100 120 Sand, very coarse to fine, with some granules and pebbles; subrounded to angular, poorly sorted; gravel rock fragments 

(volcanic, granitic), mafic minerals; dark yellowish brown (10YR 4/2).

120 140 Sand, coarse to fine, with some gravel, granules; poorly sorted; subrounded to subangular, moderate yellowish brown 

(10YR 5/4).

140 160 Sand, very coarse to fine, with some gravel, granules; poorly sorted; subrounded to subangular; moderate yellowish 

brown (10YR 5/4).

160 180 Sand, fine to coarse, with some granules; poorly sorted; subrounded to angular, quartz, biotite, volcanic rock fragments; moderate yellowish brown (10YR 5/4) to dark yellowish brown (10YR 4/2).

180 200 Sand, medium to fine, with some coarse grains, occasional granules, possible silt; poorly sorted; subrounded to subangular, moderate yellowish brown (10YR 5/4).

200 220 Sand, fine to medium, with occasional granules, some silt; moderately sorted; subrounded to subangular, dark yellowish brown (10YR 4/2) to moderate yellowish brown (10YR 5/4).

220 240 Sand, fine to coarse, with occasional granules, some silt; poorly sorted; subrounded to subangular, dark yellowish 

brown (10YR 4/2).

240 260 Sand, fine to coarse, with some gravel, granules; poorly sorted; subrounded to angular, abundance of mafic minerals 

and rock fragments; dark yellowish brown (10YR 4/2).

260 280 Sand, coarse to fine, with gravel, granules to pebbles; poorly sorted; subrounded to angular, gravel looks like volcanic 

rock fragments; dark yellowish brown (10YR 4/2).

280 300 Sand, medium to very coarse, with gravel, granules to pebbles; poorly sorted; subrounded to angular, gravel mostly 

volcanic rock fragments, some granitic; dark yellowish brown (10YR 4/2).

300 320 Sand, fine to medium, with some coarse, occasional granules; moderately sorted; mostly rounded to subangular, dark 

yellowish brown (10YR 4/2).

320 340 Sand, fine to coarse, with gravel, granules to pebbles, some silt; poorly sorted; subrounded to angular; dark yellowish 

brown (10YR 4/2).

340 360 Gravel, granules to pebbles, and sand, medium to coarse; gravel consists of volcanic and granitic rock fragments; 

poorly sorted; subangular to angular, dark yellowish brown (10YR 4/2).

360 380 Gravel, granules to pebbles, with some sand, medium to coarse; poorly sorted; angular to subrounded; dark yellowish 

brown (10YR 4/2); rock fragments (volcanic, granitic).

380 400 Gravel, granules to pebbles, with some sand, fine to coarse; poorly sorted; subrounded to angular, dark yellowish 

brown (10YR 4/2); volcanic, granitic rock fragments.

400 420 Gravel, granules to pebbles, with some sand, fine to coarse; poorly sorted; subrounded to angular, dark yellowish 

brown (10YR 4/2); volcanic, granitic rock fragments.

Table 17 151
Table 17. Uthologic log for borehole of monitoring site NH1 (14N/3E-32B1, -32B2, -32B3) at Fort Irwin National Training 

Center, California Continued

Depth (ft)

Description

From To

NH1 (14N/3E-32B1, -32B2, -32B3) Continued

Cuttings

420 440 Gravel, granules to pebbles, and sand, medium to coarse; poorly sorted; angular to subrounded; dark yellowish brown 

(10YR 4/2); volcanic and granitic rock fragments.

440 460 Gravel, granules to pebbles, and sand, medium to very coarse; poorly sorted; angular, some subrounded; dark yellowish brown (10YR 4/2); rock fragments are mostly volcanic, some granitic.

460 480 Gravel, granules to pebbles, with some sand, medium and coarse; poorly sorted; angular, dark yellowish brown (10YR 

4/2); fragments of volcanic and granitic rocks.

480 500 Gravel, granules to pebbles, and sand, medium to coarse; poorly sorted; subangular to angular, dark yellowish brown 

(10YR 4/2); mostly volcanic rock fragments.

500 520 Gravel, granules to pebbles, and sand, medium to coarse; poorly sorted; angular; grayish brown (SYR 3/2); mostly volcanic rock fragments, some granitic.

520 540 Gravel, granules to pebbles, and sand, medium to coarse; poorly sorted; angular, grayish brown (SYR 3/2); mostly volcanic rock fragments, some granitic.

540 560 Gravel, granules to pebbles, and sand, medium to coarse; poorly sorted; angular; grayish brown (SYR 3/2); mostly red, 

brown, black volcanic rock fragments.

560 580 Gravel, granules to pebbles, and sand, medium to coarse; poorly sorted; angular, grayish brown (SYR 3/2); mostly red, 

brown, black volcanic rock fragments.

580 600 Ground-up fragments of volcanic rocks, granules to pebbles, and medium to coarse sand-sized; poorly sorted; angular; 

dark yellowish brown (10YR 4/2) to grayish brown (SYR 3/2).

600 620 Ground-up fragments of volcanic rocks, some granules and pebbles, mostly medium to coarse sand-sized; poorly 

sorted; angular, some granitic rock fragments; grayish brown (SYR 3/2).

620 640 Ground-up rock fragments, mostly volcanic, some granitic, medium to coarse sand-sized, occasionally granules and 

pebbles; poorly sorted; angular, grayish brown (SYR 3/2).

640 660 Volcanic, ground-up rock fragments, some granitic (pink, yellow, orange; jasper); medium to very coarse, some gran- 

___________ules; poorly sorted; angular, blackish red (SYR 2/2). _________________

152 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 18. Lithologic log for borehole of monitoring site BASEBALL (14N/3E-32F2, -32F3) at Fort Irwin National Training 

Center, California

[ft, foot Altitude of land surface approximately 2,530 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, November 6-8,1994. Total 

depth drilled 500 ft Perforated intervals 44O-460 and 270-290 ft]

Description

From To

BASEBALL (14N/3E-32F2, -32F3) 

Cuttlnya

0 20 Silty gravelly sand, medium to coarse; poorly sorted; subrounded to rounded; moderate yellowish brown (10YR 5/4) 

to dark yellowish brown (10YR 4/2).

20 40 Silty gravelly sand, coarse; poorly sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

40 60 Silty gravelly sand, coarse to very coarse; poorly sorted; subangular to angular, moderate yellowish brown 

(10YR5/4).

60 80 Sandy gravel, medium to coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4).

80 100 Sandy gravel, coarse to very coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4).

100 120 Gravelly sand, coarse; poor to moderately sorted; subrounded to rounded; moderate yellowish brown (10YR 5/4).

120 140 Gravelly sand, coarse; moderately sorted; subangular, pale yellowish brown (10YR 6/2).

140 160 Silty gravelly sand, medium to coarse; moderately to poorly sorted; subangular, pale yellowish brown (10YR 6/2).

160 180 Silty sand, medium to coarse; moderately sorted; pale yellowish brown (10YR 6/2).

180 200 Gravelly silty sand, medium to coarse; poorly sorted; subangular to subrounded; pale yellowish brown (10YR 6/2).

200 220 Silty sand, medium to very coarse; some gravel; poorly sorted; subangular to angular, pale yellowish brown 

(10YR6/2).

220 240 Sandy gravel, coarse to very coarse; poorly sorted; angular, pale yellowish brown (10YR 6/2).

240 260 Sandy gravel, coarse; poorly sorted; subangular to angular, pale yellowish brown (10YR 6/2).

260 280 Silty sand, medium to coarse; poorly sorted; subrounded to rounded; pale yellowish brown (1OYR 6/2).

280 300 Silty sand, medium to coarse; poorly sorted; subangular to subrounded; pale yellowish brown (10YR 6/2).

300 320 Silty sand, medium to coarse; poorly sorted; subangular to subrounded; pale yellowish brown (10YR 6/2).

320 340 Silty sand, medium to coarse; poorly sorted; angular to subangular, pale yellowish brown (10YR 6/2).

340 360 Sand, coarse, with traces of silt; moderately poorly sorted; angular, dark yellowish brown (10YR4/2).

360 380 Sandy gravel, medium to coarse; poorly sorted; subangular to angular, dark yellowish brown (10YR4/2).

380 400 Sandy gravel, medium to coarse; poorly sorted; subangular to subrounded; dark yellowish brown (10YR 4/2).

400 420 Gravelly sand, medium, few coarse; moderately sorted; angular, dark yellowish brown (10YR 4/2).

420 440 Sandy gravel, medium to coarse; moderately sorted; angular, dark yellowish brown (10YR 4/2).

440 460 Sand, medium to coarse, some gravel; poorly sorted; angular, pale yellowish brown (10YR 6/2) to dark yellowish 

brown (10YR 4/2).

460 480 Sand, medium; well sorted; angular, dark yellowish brown (10YR 4/2).

480 500 Sand, medium to coarse; some gravel; poorly sorted; subangular to angular, dark yellowish brown (10YR4/2).

Table 18 153
Table 19. Lithologic log for borehole of monitoring site FI1(14N/3E-32K3, -32K4, -32K5, -32K6) at Fort Irwin National Training 

Center, California

[ft, foot Altitude of land surface 2,472.43 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, February 16-23,1993. Total depth drilled 

493 ft Perforated intervals 420-440,335-355,270-290, and 210-230 ft]

 

Depth (ft) r x ' Description

From To

FI1(14N/3E-32K3, -32K4, -32K5, -32K6) 

Cuttings 

0 20 No sample collected

20 40 Sand, fine to very coarse, with some granules and pebbles; poorly sorted; subrounded, occasional angular, some mica 

and mafic minerals; moderate yellowish brown (10YR 5/4) to dark yellowish brown (10YR 4/2).

40 60 Sand, fine to very coarse, with some granules and pebbles; poorly sorted; subrounded; occasional rock framents (volcanic?), some mafic minerals, possibly clay; moderate yellowish brown (10YR 5/4).

60 80 Sand, fine to very coarse, with some granules and pebbles; poorly sorted; subrounded; occasional volcanic rock fragments, some clay; moderate yellowish brown (10YR 5/4).

80 100 Sand, fine to very coarse, with granules to small pebbles; poorly sorted; subrounded, some subangular rock fragments; 

abundant mica; moderate yellowish brown (10YR 5/4).

100 120 Sand, fine to very coarse, with granules and pebbles, some clay; poorly sorted; rounded to subrounded, occasional subangular rock fragments; abundant mica; moderate yellowish brown (10YR 5/4).

120 140 Sand, fine to very coarse, with granules and pebbles; poorly sorted; subrounded to subangular; moderate yellowish 

brown (10YR 5/4).

140 160 Sand, fine to very coarse, with granules to small pebbles, some clay; poorly sorted; subrounded to subangular, moderate yellowish brown (10YR 5/4).

160 180 Sand, fine to very coarse, and granules to small pebbles; poorly sorted; subrounded, occasional angular rock fragments; moderate yellowish brown(10YR 5/4).

180 200 Sand, fine to very coarse, and granules to small pebbles; poorly sorted; subrounded; moderate yellowish brown (10YR 

5/4).

200 220 Gravelly silty sand, very fine sand to small pebbles, with silt; poorly sorted; subangular; moderate yellowish brown 

(10YR 5/4).

220 240 Slightly gravelly sand, fine sand to small pebbles, some silt; poorly sorted; subrounded; moderate yellowish brown 

(10YR5/4).

240 260 Slightly gravelly sand, fine sand to small pebbles, with some silt; poorly sorted; subrounded to subangular, moderate 

yellowish brown (10YR 5/4).

260 280 Slightly gravelly sand, fine sand to small pebbles, with some silt; poorly sorted; subrounded to subangular, moderate 

yellowish brown (10YR 5/4).

280 300 Sand, fine to very coarse; moderately poorly sorted; subrounded to subangular, moderate yellowish brown (10YR 5/4).

300 320 Sand, very fine to medium, with coarse grains; moderately sorted; subrounded to subangular; dark yellowish brown 

(10YR 4/2); some mafic minerals.

320 340 Sand, fine to coarse; moderately sorted; subrounded to subangular, dark yellowish brown (10YR 4/2).

340 360 Sand, fine to coarse; moderately sorted; subrounded to subangular, dark yellowish brown (10YR 4/2).

360 380 Sand, fine to coarse; moderately sorted; subrounded to subangular, dark yellowish brown (10YR 4/2).

380 400 Sand, fine to coarse, with some very coarse grains; poorly sorted; subrounded to subangular, dark yellowish brown 

(10YR4/2).

400 420 Sand, fine to very coarse, with some angular rock fragments; poorly sorted; subrounded to angular; dark yellowish 

brown (10YR 4/2).

420 440 Sand, fine to very coarse, many angular rock fragments; poorly sorted; subangular to angular, dark yellowish brown 

(10YR 4/2) to grayish brown (SYR 3/2).

440 460 Ground-up granitic rock, quartz, mafic minerals, mica, medium-sized grains; well sorted; subangular, olive gray 

(5Y 3/2).

460 490 Ground-up granitic rock, quartz, mafic minerals, mica, fine and medium-sized grains; well sorted; subangular, olive 

gray (5Y 3/2).

490 493 Core: Granitic bedrock.

154 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 20. Uthologic log for borehole of monitoring site SOC2 (14N/3E-32N1, -32N2, -32N3) at Fort Irwin National Training 

Center, California

[ft, foot. Altitude of land surface approximately 2,530 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, May 9-10,1995. Total depth 

drilled 540 ft Perforated intervals 500-520,39(M10, and 250-270 ft]

Depth (ft)

Description

From To

SOC2 (14N/3E-32N1, -32N2, -32N3) 

Cuttings

0 18 Sand, some gravel, medium to very coarse; poorly sorted; subrounded; moderate yellowish brown (10YR 5/4). 

18 38 Sand, some gravel, medium to very coarse; poorly sorted; subangular; moderate yellowish brown (10YR 5/4).

38 58 Sand, some gravel, medium to very coarse; poorly sorted; subrounded to subangular, moderate yellowish brown 

(10YR 4/2) to dark yellowish brown (10YR 4/2).

58 78 Sand, trace gravel, medium to coarse; moderately sorted; subrounded; dark yellowish brown (10YR 4/2).

78 98 Sand, medium to coarse; moderately to well sorted; subrounded; dark yellowish brown (10YR 4/2).

98 118 Sand, medium to coarse; moderately sorted; subangular; dark yellowish brown (10YR 4/2).

118 138 Sand, medium grained; well sorted; subangular to angular, moderate yellowish brown (10YR 5/4).

138 158 Sand, medium grained; moderately sorted; subrounded; moderate yellowish brown (10YR 5/4).

158 178 Sand, medium to coarse grained; moderate to poorly sorted; subrounded to subangular, moderate yellowish brown 

(10YR 5/4) to dark yellowish brown (10YR 4/2).

178 198 Sand, medium to very coarse; moderately to poorly sorted; subrounded; moderate yellowish brown (10YR5/4).

198 218 Sand, some gravel; fine to coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4).

218 238 Sand, some gravel; medium, some coarse; poorly sorted; subangular; moderate yellowish brown (10YR 5/4).

238 258 Sand, medium to coarse; moderately to poorly sorted; subangular to angular, moderate yellowish brown (10YR 5/4).

258 278 Sand, medium grained; moderately sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

278 298 Sand, medium grained; moderately sorted; subrounded; moderate yellowish brown (10YR 5/4).

298 318 Sand, medium to coarse; moderately sorted; subrounded to subangular, moderate yellowish brown (10YR 5/4).

318 338 Sand, medium to coarse; moderately sorted; subangular, moderate yellowish brown (10YR 5/4).

338 358 Sand, fine to coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4).

358 378 Sand, medium to very coarse; poorly sorted; subrounded; moderate yellowish brown (10YR 5/4).

378 418 Sand, coarse to very coarse; moderately sorted; rounded to subrounded; moderate yellowish brown (10YR 5/4).

418 438 Sand, some gravel; medium to very coarse; poorly sorted; subangular, moderate yellowish brown (10YR 5/4).

438 458 Sand, trace gravel; medium to coarse; moderately sorted; subangular, dark yellowish brown (10YR 4/2).

458 478 Sand with gravel, medium to very coarse; poorly sorted; subangular, dark yellowish brown (10YR 4/2).

478 498 Sand some gravel; medium to coarse; moderately sorted; subangular, moderate yellowish brown (10YR 5/4) to dark 

yellowish brown (10YR 4/2).

498 518 Sand, fine to medium; moderately sorted; subrounded; dark yellowish brown (10YR 4/2).

Table 20 155
Table 21. LJthologic log for borehole of monitoring site SOC1 (14N/3E-32P2, -32P3, -32P4, -32P5, -32P6) at Fort Irwin 

National Training Center, California

[ft, foot. Altitude of land surface approximately 2,517 ft above sea level. Drilled by the U.S. Geological Survey using mud rotary, June 2-8,1994. Total 

depth drilled 905 ft. Perforated intervals 850-870 and 894-904,710-730,560-580,385-405, and 250-270 ft]

Depth (ft)

Description

From To

SOC1 (14N/3E-32P2, -32P3, -32P4, -32P5, -32P6) 

Cuttings

0 40 Sand, fine to coarse; granules and pebbles;poorly sorted; angular to subrounded; mafic minerals; moderate yellowish 

brown (10YR 5/4).

40 60 Sand, fine to coarse, with granules, pebbles, and clay; poorly sorted; subangular to subrounded; mafic minerals; moderate yellowish brown (10YR 5/4).

60 80 Sand, fine to coarse, with some granules, pebbles and clay; poorly sorted; subangular to subrounded; mafic minerals; 

moderate yellowish brown (10YR 5/4).

80 120 Sand, fine to coarse, with occasional granules and some clay; poorly sorted, subangular to subrounded; moderate yellowish brown (10YR 5/4).

120 140 Sand, fine to coarse, with granules, pebbles, and some clay; poorly sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

140 160 Sand, fine to coarse, with granules, pebbles, and some clay; poorly sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

160 240 Sand, fine to coarse, with clay and some granules; poorly sorted; subrounded to subangular, moderate yellowish 

brown (10YR 5/4).

240 280 Sand, fine to coarse, with clay and some granules; poorly sorted; subrounded to subangular, moderate yellowish 

brown (10YR 5/4).

280 360 Sand, fine to medium, with clay and some granules; moderately sorted; subangular to subrounded; mafic minerals; 

moderate yellowish brown (10YR 5/4).

360 390 Sand, fine to coarse, with some clay and some granules; poorly sorted; subangular to subrounded; moderate yellowish 

brown (10YR 5/4).

390 440 Sand, fine to medium, with some clay; moderately sorted; subangular to subrounded; moderate yellowish brown 

(10YR5/4).

440 460 Sand, fine to coarse, with granules and some clay; poorly sorted; angular to subrounded; mafic minerals, mica; dark 

yellowish brown (10YR 4/2).

460 520 Sand, fine to coarse, with some clay and occasional granules; poorly sorted; angular to subrounded; mafic minerals 

and mica; dark yellowish brown (10YR 4/2).

520 560 Sand, fine to medium, with clay; moderately sorted; subangular to subrounded, mafic minerals and mica; dark yellowish brown (10YR 4/2).

560 590 Sand, fine, some medium, with clay, moderately sorted; subrounded; mafic minerals and mica; dark yellowish brown 

(10YR4/2).

590 640 Sand, fine to medium, with clay; moderately sorted; subrounded; mica; olive gray (5Y 3/2).

640 660 day, with fine sand; olive gray (5Y 3/2).

660 720 Sand, fine to medium, with clay; moderately sorted; subangular to subrounded; olive gray (5Y 3/2).

720 770 Sand, fine to medium, with clay; occasional granules; moderately sorted; subangular to subrounded; mica; olive gray; 

(5Y 3/2).

770 780 Sand, medium to fine, with clay; moderately sorted; subrounded; mica, mafic minerals; olive gray (5Y 3/2).

780 820 Sand, medium to fine, with clay; occasional granules; moderately sorted; subangular to subrounded; abundant mica 

and mafic minerals; olive gray (5Y 3/2).

820 840 day and sand, fine to coarse; poorly sorted; subangular to subrounded; olive gray (5Y 3/2); mica.

840 905 Clay with fine sand, some medium; grayish olive (10YR 4/2); abundant mafic minerals and mica; possible siltstone.

156 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California
Table 22. Lithologic log for borehole of monitoring site BC1 (14N/3E-33A1) at Fort lew in National Training Center, California

[ ft, foot. Altitude of land surface approximately 2,420 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, February 20-22,1994. Total 

depth drilled 185 ft. Perforated interval 145-185 ft]

Description

From To

BC1 (14N/3E-33A1) 

Culttlnga

0 20 Sand, fine to coarse, some granules; poorly sorted; subangular to subrounded; mica and mafic minerals present; moderate brown (SYR 4/4).

20 48 Ground-up metamorphic rock, possibly mica schist; mostly mica, mafic minerals, and quartz; sample consists of 

medium to very coarse sand-sized particles; subangular, olive black (5Y 2/1).

48 61 Clay, with ground-up metamorphic rock; mica, mafic minerals, quartz, occasional rock fragments; some sand, fine to 

medium-sized grains; poorly sorted; angular, olive gray (SY 4/1).

61 68 No sample collected. Clay layer.

68 80 Ground-up metamorphic rock; mostly mica, mafic minerals, quartz; some sand, very fine to fine-size grains; olive 

black (5Y 4/4).

80 95 Ground-up granitic rock, very fine- to fine-sized fragments, with clay; moderately sorted; abundant mica, mafic minerals, and quartz, occasional larger rock fragments; dark yellowish brown (10YR 4/2).

95 120 Ground-up granitic rock, fine- to coarse-sized fragments, with some very coarse occasional granules and pebbles; 

poorly sorted; subangular, occasional rock fragments; dark yellowish brown (10YR 4/2).

120 140 Ground-up granitic rock, fine- to very coarse-sized fragments, gravelly granules to pebbles; poorly sorted; sand is 

subangular to subrounded; dark yellowish brown (10YR 4/2) to olive gray (5Y 3/2).

140 160 Ground-up granitic rock, fine- to very coarse-sized fragments, some granules; occasional rock fragments; poorly 

sorted; angular to subrounded; dark yellowish brown (10YR 4/2) to olive gray (5Y 3/2).

160 180 Ground-up granitic rock, fine- to very coarse-sized fragments, with clay, occasional rock fragments; poorly sorted; 

subangular to subrounded; abundant mica at approximately 180 ft; dark yellowish brown (10YR 4/2) to olive gray 

(5Y 3/2).

180 185 Ground-up granitic rock, medium- to very coarse-sized fragments, with clay, some granule-and pebble-sized gravel; 

poorly sorted; angular to subangular, dark yellowish brown (10YR 4/2) to olive gray (5Y 3/2).

Table 22 157
Table 23. LJthologic log for borehole of monitoring site PICNIC (14N/3E-33E2, -33E3) at Fort Irwin National Training Center, 

California

[ft, foot Altitude of land surface approximately 2,425 ft above sea level. Drilled by U.S. Geological Survey using mud rotary, March 7-9,1994. Total depth 

drilled 260 ft. Perforated interval 200-220 and 155-175 ft]______________________________________________

Depth (ft)

Description

From To

PICNIC (14N/3E-33E2, -33E3) 

Cuttings

0 20 Gravel, granules to pebbles, and sand, fine to coarse; poorly sorted; angular to subrounded; moderate brown (SYR 

4/4).

20 40 Sand, fine to coarse, with granules and pebbles; poorly sorted; subangular to subrounded; some mica; moderate 

brown (SYR 4/4).

40 120 Sand, fine to coarse, with granules and pebbles, some clay; poorly sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

120 140 Sand, fine to coarse, with some granules and some clay; poorly sorted; subangular to subrounded; moderate yellowish 

brown (10YR 5/4).

140 160 Sand, fine to coarse, with some granules and clay; poorly sorted; subangular to subrounded; moderate yellowish 

brown (10YR 5/4).

160 180 Sand, fine to medium, some coarse, with occasional granules, some clay; moderately sorted; subangular to subrounded; moderate yellowish brown (10YR 5/4).

180 200 Sand, fine to coarse, with some granules; poorly sorted; subangular to subrounded; abundant mafic minerals and some 

mica; dark yellowish brown (10YR 4/2).

200 22S Sand, fine to coarse, with occasional granules; poorly sorted; subangular to subrounded; mafic minerals and mica; 

dark yellowish brown (10YR 4/2).

22S 260 Weathered granitic rock, (mostly quartz, mafic minerals, and mica); olive gray (SY 4/1).

Table 24. Lithologic log for borehole of monitoring site LFMYV7 (14N/3E-33J2) at Fort Irwin National Training Center, 

California

[ft, foot. Altitude of land surface approximately 2,390 ft above sea level. Drilled by U.S. Geological Survey using air odex, April 19-20,1994. Total depth 

drilled 116.5 ft. Perforated intervals 76-116 ft]_____________________________________________________

Depth (ft)

Description From To

LFMW7 (14N/3E-33J2) 

Cuttings

0 10 Sand, very fine to medium, with some silt, occasional granules; moderately sorted; subrounded; moderate brown 

(SYR 4/4).

10 20 day, some very fine sand, with occasional granules, some mica, some rock fragments; moderate yellowish brown 

(10YR5/4).

20 30 Sand, very fine to medium, with some granules, occasional pebbles, some clay; moderately sorted; subrounded; some 

rock fragments; moderate brown (SYR4/4).

30 40 Sand, very fine to medium, with gravel, granule to pebble; poorly sorted; sand is subangular to subrounded, gravel is 

angular to subangular, abundant mica and mafic minerals; moderate yellowish brown (10YR 5/4).

40 50 Sand, very fine to medium, with some silt; moderately sorted; subangular to subrounded; some mica and mafic minerals; moderate yellowish brown (10YRS/4).

50 60 Ground-up metamorphic rock, abundant mica, mafic minerals, and quartz.

60 70 Ground-up metamorphic rock, mica, mafic minerals, quartz, olive black (5YR2/1).

70 116 No sample collected. Ground-up metamorphic rock, possibly mica schist.

158 Ground-Water Hydrology and Water Quality of Irwin Basin at Fort Irwin National Training Center, California