Water-Quality Synoptic Sampling, July 1999:

North Fork Shenandoah River, Virginia

Scientific Investigations Report 2004-5153

U.S. Department of the Interior

U.S. Geological Survey

Prepared in cooperation with

Northern Shenandoah Valley Regional Commission

and Virginia Polytechnic Institute and State University
Cover photograph of North Fork Shenandoah River, near Cootes Store, Virginia; view looking upstream,

by Donald C. Hayes, U.S. Geological Survey, October 22, 2002.
Water-Quality Synoptic Sampling,

July 1999: North Fork Shenandoah

River, Virginia

By Jennifer L. Krstolic and Donald C. Hayes

U.S. Department of the Interior

U.S. Geological Survey

Northern Shenandoah Valley Regional Commission

and Virginia Polytechnic Institute and State University

Scientific Investigations Report 2004-5153
U.S. Department of the Interior

Gale A. Norton, Secretary

U.S. Geological Survey

Charles G. Groat, Director

U.S. Geological Survey, Reston, Virginia: 2004

For more information about the USGS and its products:

Telephone: 1-888-ASK-USGS

World Wide Web: http://www.usgs.gov/

Any use of trade, product, or firm names in this publication is for descriptive purposes only

and does not imply endorsement by the U.S. Government.

For additional information write to:

District Chief

U.S. Geological Survey

1730 East Parham Rd.

Richmond, VA 23228

dc_va@usgs.gov

Information about water resources in Virginia is available online at http://va.water.usgs.gov
 iii

Contents

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

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

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

Description of Study Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Methods of Study . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Site Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Instrumentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Water-Quality Field Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Continuous Water-Quality Field Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Instantaneous Water-Quality Field Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Results of Water-Quality Synoptic Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Dissolved Oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Specific Conductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Summary and Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

References Cited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Appendix 

Continuous water-quality monitoring data for the North Fork Shenandoah River, Virginia . . . . . . . . . . . . . .27

Figures

1-2. Maps showing:

1. Location of the North Fork Shenandoah River Basin, Virginia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Locations of continuous and instantaneous water-quality monitoring sites,

and streamflow-gaging stations on the North Fork Shenandoah River, Virginia . . . . . . . . . . . . . . . . . . . . . 4

3-10. Graphs showing:

3. Streamflow in July 1999 for 3 streamflow-gaging stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4. Dissolved-oxygen concentrations at water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5. Dissolved-oxygen as percent air saturation at water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . 16

6. Ratios of dissolved-oxygen concentrations at water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . . 18

7. Dissolved-oxygen concentrations at three pairs of upstream and

downstream continuous water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8. pH at water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9. Specific conductance at water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

10. Water temperature at water-quality monitoring sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Tables

1. Locations of water-quality monitoring sites on the North Fork 

Shenandoah River, Virginia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2. Water-quality sampling instrument specifications used in the water-quality

synoptic sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3. Minimum and maximum dissolved-oxygen concentrations and associated

water-quality parameter values from continuous monitoring sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4. Early morning and late afternoon dissolved-oxygen concentrations and

associated water-quality parameter values from instantaneous monitoring sites . . . . . . . . . . . . . . . . . 12
iv 

Conversion Factors, Datum, and Abbreviated 

Water-Quality Units

Multiply By To obtain

Length

inch (in.) 2.54 centimeter (cm)

inch (in.) 25.4 millimeter (mm)

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

cubic foot (ft3) 0.028317 cubic meter

square mile (mi2) 259.0 hectare (ha)

square mile (mi2) 2.590 square kilometer (km2)

Volume

gallon (gal) 3.785 liter (L)

Mass

ounce, avoirdupois (oz) 2.835 milligram

Flow

cubic foot per second (ft3/s) 0.02832 cubic meter per second

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

°F = (1.8 x °C) + 32

Vertical coordinate information is referenced to National Geodetic Vertical Datum of

1929 (NGVD 29)

Horizontal coordinate information is referenced to North American Datum of 1927 (NAD 27)

Abbreviated water-quality units: Chemical concentration is reported in milligrams per liter (mg/L). 

Milligrams per liter is a unit expressing the concentration of chemical constituents in solution as 

mass (milligrams) of solute per unit volume (liter) of water. For concentrations less than 7,000

mg/L, the numerical value is the same as for concentrations in parts per million. Specific electrical 

conductance of water is reported in microsiemens per centimeter at 25 degrees Celsius (μS/cm). 
Water-Quality Synoptic Sampling, July 1999: North Fork 

Shenandoah River, Virginia

By Jennifer L. Krstolic and Donald C. Hayes

Abstract

A study was conducted of water-quality conditions that 

may affect aquatic life during periods of low streamflow on the 

North Fork Shenandoah River, Va. Monthly mean streamflows 

in July 1999 at three streamflow-gaging stations were the lowest measured during the historical record on the river. Daily 

extremes of dissolved-oxygen concentrations were measured, 

along with pH, specific conductance, and water- temperature 

values, at 52 sites along 80 mi of the North Fork Shenandoah 

River from Cootes Store, Va., to its confluence with Passage 

Creek, near Strasburg, Va.

Dissolved-oxygen concentrations ranged from 2.1 to 16.4 

milligrams per liter (mg/L). Dissolved-oxygen concentrations 

were equal to or less than the State water-quality minimum of 

4.0 mg/L at 18 of 52 monitoring sites; all 18 sites were in the 

upper and middle portions of the river, where more than half of 

the first 34 sites had minimum dissolved-oxygen concentrations 

equal to or less than 4.0 mg/L. There were large variations from 

minimum to maximum dissolved-oxygen concentrations, with 

concentrations fluctuating as much as 10 mg/L per day; and typically 5 mg/L per day during the study period.

pH ranged from 7.6 to 9.6, with pH values frequently 

greater than 9.0 in the downstream portion of the river. Specificconductance values ranged from 178 to 856 microsiemens per 

centimeter (μS/cm), with values greater than 600 μS/cm only 

measured at a group of five sites in the upstream portion of the 

river. Air temperatures ranged from 21.0 to 37.0 degrees Celsius (oC), and water temperatures ranged from 17.00 to 30.14oC. 

Along the length of the North Fork Shenandoah River, longitudinal variation in water-quality parameters was small. Groups 

of sites that differed from the general pattern define reaches 

where increased monitoring may help determine the factors that 

affect water quality at those sites.

Introduction

The demands on the water resources of the Shenandoah 

River Basin in Virginia are a concern to a number of local, 

State, and Federal agencies, as well as private citizen groups. 

The demand on water resources has increased as a result of population growth in the past 20 years. From 1980 to 2000, population in the Shenandoah River Basin increased 30 percent, and 

water withdrawals for public supply and domestic use increased 

40 percent (Solley and others, 1988, 1993, 1998; Hutson and 

others, 2004). Droughts in this region tax ground-water and surface-water supplies, which are used for public supply, domestic, 

and agricultural uses in the basin. In 1997, 1998, and 1999, 

drought conditions in the Shenandoah River Basin contributed 

to critical losses suffered by farmers, such as major damage to 

corn, hay, pasture, and small grain, as well as cattle weight loss. 

In response to these losses, Clarke County declared a state of 

emergency for three consecutive summers (Alison Teetor, Natural Resource Planner, Clarke County, Va., oral commun., 

2004). During the 1999 low-flow period, mean monthly flows 

in July recorded at three streamflow-gaging stations on the 

North Fork Shenandoah River, a major tributary to the Shenandoah River, were the lowest observed over the 55- to 74-year 

periods of record (White and others, 2000). These droughts 

increased public awareness of the importance of a sustainable 

water supply and indicated a need for information on the availability and quality of water resources in the Shenandoah Basin. 

There are concerns that streamflows are adequate not only 

for a sustainable public water supply but also to support the 

aquatic and terrestrial community, to support recreation, and to 

maintain aesthetic characteristics of rivers in the basin. The 

North Fork Shenandoah River Basin, which is located in Virginia and West Virginia, 75 mi west of Washington, D.C. 

(fig. 1), supports a diverse aquatic and terrestrial community 

including 10 Federal or State listed species (indicating endangered, threatened, or special concern): freshwater mussels 

(brook floater, green floater, yellow lampmussel), isopods 

(Madison cave isopod, Shenandoah Valley cave isopod), reptiles and amphibians (wood turtle, cow knob salamander), birds 

(peregrine falcon), and bats (Indiana bat, Virginia big-eared 

bat) (Roble, 2001). Ensuring adequate streamflows to support 

these species and the diverse fish community (at least 37 species) (Persinger, 2003) not only protects the aquatic and terrestrial community in the North Fork Shenandoah Basin, but also 

maintains the river as a source for recreation.

In 1998, the U.S. Geological Survey (USGS), in cooperation with the Northern Shenandoah Valley Regional Commission (NSVRC) and Virginia Polytechnic Institute and State 

University (VPI), began a study to collect data and information 

on hydrology, habitat requirements of fish, and water use as part 

of a comprehensive assessment of water availability in the 
66

33

33

29

15

522

522

2

211

340

340

81

81

42

Front Royal

11

11

PAGE ROCKINGHAM

SHENANDOAH

WARREN

MADISON

FREDERICK 

RAPPAHANNOCK

AUGUSTA

GREENE HIGHLAND 

Passage Creek

Cedar Creek

Holmans

Strasburg

Woodstock

Linville Creek

Stony Creek

Creek

South

Fork

Shenandoah

River

North

Fork

Shenandoah

River Little

PassageCreek

Winchester

Harrisonburg

Timberville

Cootes Store

Shenandoah

Smith Creek

79o

78o30' 78

38

o30'

39o

NORTH FORK SHENANDOAHRIVER BASIN (STUDY AREA)

EXPLANATION

M A S S ANUTTEN

MOUNTAIN

0 5 10 

0 5 10 15 

LITTLE NORTH MOUNTAIN

Base from U.S. Geological Survey Digital Line Graph, 1987, 1:2,000,000

Universal Transverse Mercator 17 projection, NAD 83, Central Meridian 81o00'W

Hydrography from U.S. Environmental Protection Agency Reach File Version 3.0, 1994, 1:100,000

Watershed boundary delineated from U.S. Geological Survey National Elevation Dataset digital elevation model, 2001, 30-meter resolution 

City locations from U.S. Census Cartographic Boundary Files, Consolidated Cities, 2000, ~ 1:500,000

County boundaries from U.S. Geological Survey National Atlas coverage, 1995, 1:2,000,000

Roads from ESRI Streetmap USA, 2003

WEST

VIRGINIA

VIRGINIA

MARYLAND

DELAWARE

PENNSYLVANIA

RIDGE BLUE

VALLEY

RIDGE

AND

Shenanadoah River Basin Washington, D.C.

STUDY AREA

Figure 1. Location of the North Fork Shenandoah River Basin, Virginia (study area).
Introduction 3

North Fork Shenandoah River Basin. Prior to the onset of this 

study, Zappia and Hayes (1998) related water availability to the 

physical habitat needs of fish and other water uses along the 

Shenandoah River using Instream Flow Incremental Methodology (IFIM) techniques. Other studies have shown the utility of 

the IFIM process for water-resources management during lowflow conditions (Stalnaker, 1981; Leonard, Orth, and Goudreau, 1986; Orth and Leonard, 1990; Vadas and Weigmann, 

1993). Following Zappia and Hayes (1998), IFIM techniques 

are being used in the North Fork Shenandoah River Basin to 

enhance understanding of low-flow conditions, to relate water 

availability to physical habitat needs of fish, and to provide science-based information for water management.

As part of the North Fork Shenandoah River IFIM study, 

water-quality data were collected in July 1999 at 52 sites along 

80 mi of the North Fork Shenandoah River from Cootes Store, 

Va., to the confluence with Passage Creek, near Strasburg, Va. 

The objective of this water-quality study was to measure daily 

minimum and maximum values of dissolved-oxygen concentrations, and to measure pH, specific conductance, and water temperatures during low-flow conditions. Monitoring the variability of dissolved-oxygen concentrations throughout the river is 

important because a wide, fluctuating range of dissolved-oxygen concentrations may affect metabolism, growth, and development of fish (Wilding, 1939; Stewart and others, 1967; Whitworth, 1968; Fry, 1971; Davis, 1975).

Purpose and Scope

This report describes the daily fluctuations of dissolvedoxygen concentrations and reports associated water temperature, pH, and specific-conductance values at 52 sites along 80 

mi of the North Fork Shenandoah River from Cootes Store, Va., 

to its confluence with Passage Creek, near Strasburg, Va. 

Water-quality data were collected at 18 continuous monitoring 

sites and at 34 instantaneous monitoring sites from July 12-30, 

1999.

This study was a short-term (less than one month) synoptic 

survey of water quality to measure daily minimum and maximum values of dissolved-oxygen concentrations and to contribute to the North Fork Shenandoah River IFIM study. This 

data-collection effort provides information about water-quality 

conditions that may affect aquatic life during summer low-flow 

periods (defined as flows less than the 90-percent exceedance 

flows) on the North Fork Shenandoah River, Va. The geographic distribution of water-quality values is presented in 

tables and on maps that show the range of values at each monitoring site relative to the site’s location along the river.

Description of Study Area

The headwater streams that feed the North Fork Shenandoah River have their source in West Virginia, but the mainstem 

begins in Rockingham County, Va., and continues through 

Shenandoah and Warren Counties in Virginia. The river generally flows northeast parallel to Interstate-81 and Highway-11 

from Timberville, Va., to Front Royal, Va. The study sites 

included in this report are on an 80-mi-long portion of the North 

Fork Shenandoah River between Cootes Store, Va., and its confluence with Passage Creek near Strasburg, Va. (fig. 2), integrating a drainage area of 768 mi2

.

The North Fork Shenandoah River lies within the Valley 

and Ridge Physiographic Province. The basin topography is 

characterized by rolling hills and valleys, and is bordered on the 

eastern edge by Massanutten Mountain, which separates the 

North Fork Shenandoah River from the South Fork Shenandoah 

River (Virginia Department of Conservation and Economic 

Development, 1968). The northeast-southwest trending ridges 

of the Valley and Ridge are formed by resistant quartzite, sandstone, and conglomerates; the valleys are underlain by more 

readily weathered limestone, shale, and dolomite (Hack, 1965; 

Hayes, 1991). Karst topography over the limestone and dolomite rocks results in sinkholes, springs, and concentrated 

ground-water discharge to the river. The river has cut down to 

erosion-resistant bedrock along much of its length, giving it a 

characteristic shallow and wide channel. In the upper reaches, 

the North Fork Shenandoah River crosses the valleys and ridges 

around Little North Mountain, and then flows through the eastern side of the valley near Massanutten Mountain, where it has 

wide, gradual meanders (approximately 1.3–5.0 mi. in length 

between meanders) until it reaches Edinburg, Va. Downstream 

of Edinburg, Va., the river enters the Seven Bends area (fig. 2) 

where it is characterized by extremely narrow meanders 

(approximately 0.3 mi. in length between meanders). In the 

Seven Bends area there are 180-degree reversals, as the river 

winds in and out of the ridges on the eastern side of the valley. 

In this area, the river follows fracture zones in the shales of the 

Martinsburg Formation (Hack, 1965) that helped to form the 

narrow meanders which are common in the Seven Bends area 

(fig. 2).

Geographic location and topography strongly affect climate in the North Fork Shenandoah River Basin and in the 

Shenandoah River Basin overall. As frontal systems pass 

through the Valley and Ridge and Blue Ridge Physiographic 

Provinces of western Virginia (fig. 1), airflow is generally from 

the west. With westerly airflow, the Shenandoah River Basin is 

in the rain shadow of the mountains on the western edge of the 

Valley and Ridge; with easterly airflow, the basin is in the rain 

shadow of the Blue Ridge Mountains. As a result, the Shenandoah River Basin is one of the driest portions of the State, with 

a total annual rainfall typically a sparse 33.0 in. (Hayden and 

Michaels, 2003). During June, July, and August, mean rainfall 

is 11.0 in., with an average temperature range from 21.0 to 

24.0oC, and average maximum temperature range from 28.2 to 

31.0oC (Southeast Regional Climate Center, 2003).

The Shenandoah River Basin has a rural character, with 

land use dominated by forest and wetlands (59 percent) and 

agriculture (38 percent) (U.S. Environmental Protection 

Agency, 1996). The basin population was 402,500 people in 

2000, and has grown 17 percent from 345,100 people since the 

1990 census (U.S. Census Bureau, 2002). Historically, the 
78o

45' 78o

30' 78o

15'

38o

38o45'

39o

0 5 10 MILES

0 5 10 KILOMETERS

ROCKINGHAM

SHENANDOAH

FREDERICK

WARREN

PAGE

MADISON

RAPPAHANNOCK

VIRGINIA

WEST VIRGINIA

EXPLANATION

Seven Bends

area

9 8

7

6

5 4 3

2 1

52 50 51 49

48

47

46

45 44

43

42 41

40 39

38

37

36

35

34 33 32

31 30 29

28 27

26

25

24

23

22

21

20 19

18 17

16

15 14 13

12

10 11

Shenandoah

River

1

Luray

Edinburg

Woodstock

Strasburg

Toms Brook

Timberville

Mount Jackson

Passage Creek

Smith Creek

Cedar Creek

Stony

South Fork Shenandoah River

Holmans

Linville

01632000

01643000

01633000

Creek

Creek

Creek

New Market

Cootes Store

Narrow 

Passage

Creek Spring 

Hollow

Creek

North

Fork

48

47

01632000

Instantaneous water-quality monitoring site and number

Continuous water-quality monitoring site and number

Section of river displayed on figures 4, 5, 6, 8, 9, and 10

U.S. Geological Survey streamflow-gaging station and

 number and instantaneous water-quality monitoring 

 site and number

Virginia Department of Environmental Quality

 streamflow-gaging station and number and 

 U.S. Geological Survey continuous water-

 quality monitoring site and number

B

A

Rittenour Ridge

A

23

01633000

Base from U.S. Geological Survey Digital Line Graph, 1987, 1:2,000,000

Universal Transverse Mercator 17 projection, NAD 83, Central Meridian 81o

00'W

Hydrography from U.S. Environmental Protection Agency Reach File Version 3.0, 1994, 1:100,000

City locations from U.S. Census Cartographic Boundary Files, Consolidated Cities, 2000, ~ 1:500,000

County boundaries from U.S. Geological Survey National Atlas coverage, 1995, 1:2,000,000

4 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

Figure 2. Locations of continuous and instantaneous water-quality monitoring sites, and streamflow-gaging stations on the North Fork

Shenandoah River, Virginia. Site numbers increase downstream.
Methods of Study 5

economy of the area has been closely tied to rivers for agriculture, transportation, subsistence, and recreation. Currently 

(2004), economic activities in the basin are largely associated 

with livestock production (poultry and dairy cattle), agricultural-related industries, tourism and recreation, beverage bottling, and industries catering to universities and colleges. The 

rivers are both a water resource as well as a source of beauty and 

pride throughout the basin.

Acknowledgments

The authors thank the following for their expertise, time, 

and other support in completing the water quality portion of the 

North Fork Shenandoah River IFIM study: Dr. Donald Orth, 

VPI; the staff of the Department of Fisheries and Wildlife Sciences, VPI; and the members of the Northern Shenandoah Valley Regional Commission. The authors thank all the members 

of the Minimum Instream Flow technical advisory committee 

of NSVRC for their time and support, as well as their genuine 

interest in the health of the Shenandoah River Basin. The 

authors also thank Pat Maier and the Friends of the North Fork 

Shenandoah River for their assistance in contacting private land 

owners and obtaining permission for access to their land. The 

willingness of property owners to allow access to the river 

greatly assisted the data-collection efforts.

Methods of Study

As a part of the IFIM study along the North Fork Shenandoah River, water-quality data were collected during July of 

1999 when the monthly mean streamflows were the lowest for 

the 74-year period of record at both the Cootes Store and Strasburg streamflow-gaging stations, and for the 55-year period of 

record for the Mount Jackson streamflow-gaging station (White 

and others, 2000). Discharge (streamflow) measurements were 

not made in conjunction with the synoptic sampling; however, 

the three gages recorded streamflows equivalent to the 98- and 

99-percent exceedance values, and were used as an indication of 

low streamflow conditions during the study period. Exceedance 

values are derived from a flow-duration curve, which is a cumulative frequency curve that shows the percent of time specified 

flows were equaled or exceeded during a given period (Searcy, 

1959). Daily mean streamflow values ranging between the 25- 

and 75-percent exceedance values describe normal flow conditions.

 During the study period (July 12–30, 2004), the USGS 

streamflow-gaging station at Cootes Store, Va., recorded daily 

mean streamflow values ranging from 0.55 to 1.2 ft3

/s (White 

and others, 2000) (fig. 3). These streamflows represent approximately the 99-percent exceedance value for the Cootes Store 

gage data during July and August. Based on the previous 50 

years of data, typical flows during July and August at the Cootes 

Store gage range from 4.9 ft3

/s (75-percent exceedance value) 

to 40 ft3

/s (25-percent exceedance value).

During the study period, the Virginia Department of Environmental Quality (VDEQ) streamflow-gaging station near 

Mount Jackson, Va., recorded daily mean streamflow values 

ranging from 4.5 ft3

/s to 15.0 ft3/s (White and others, 2000) 

(fig. 3). These streamflows are within the 98- and 99-percent 

exceedance values for the Mount Jackson gage data during July 

and August. Based on the previous 50 years of data, typical 

flows during July and August at the Mount Jackson gage range 

from 55 ft3

/s (75-percent exceedance value) to 159 ft3/s (25-percent exceedance value).

During the study period, the USGS streamflow-gaging station near Strasburg, Va., recorded daily mean streamflow values ranging from 50 ft3/s to 76 ft3/s (White and others, 2000) 

(fig. 3). These streamflows represent approximately the 99-percent exceedance value for the Strasburg gage data during July 

and August. Based on the previous 50 years of data, typical 

flows during July and August at the Strasburg gage range from 

122 ft3/s (75-percent exceedance value) to 287 ft3

/s (25-percent 

exceedance value).

Low-flow conditions in the summer of 1999 were affected 

by lower than normal precipitation during the previous 12 

months. From July 1998 to June 1999, the total monthly precipitation was 62 percent lower than normal, and on average 1.7-

2.5 in. below the historical mean for each month except for January 1999 and March 1999 (Southeast Regional Climate Center, 2003). Precipitation during the fall of 1998 (September, 

October, and November) was 70 percent lower than the historical mean (Southeast Regional Climate Center, 2003). The 

reduced precipitation during the previous 12 months likely contributed to a decrease in both ground-water storage and groundwater discharge to the river.

Some precipitation fell during the field data collection 

period. In the downstream section of the basin, a total of 2.5 in. 

of rain was recorded at the weather station in Winchester, Va., 

during the study period: July 13 (0.1 in.), July 22 (0.6 in.), and 

July 29 (1.5 in.) (Southeast Regional Climate Center, 2003). 

The rain would have affected primarily the Cedar Creek drainage, and would have increased streamflow to the four study 

sites downstream of the confluence of Cedar Creek and the 

North Fork Shenandoah River. In the middle of the basin, a total 

of 1.2 in. of rain was recorded at the weather station in Woodstock, Va., during the study period: July 13 (0.1 in.), July 22 

(0.8 in.), and July 29 (0.3 in.) (Southeast Regional Climate Center, 2003).

Site Selection

Monitoring sites for continuous water-quality data collection were selected on the basis of water-use information from 

VDEQ on permitted withdrawals and discharges within the 

basin (Virginia Department of Environmental Quality, written 

commun., 1998). The total permitted withdrawals or discharges 

were determined for six tributaries to the North Fork Shenandoah River by combining values of all permits within the tributary basin. Nine locations were selected for continuous 
6 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

water-quality data collection at the confluence of tributaries 

with substantial total permitted withdrawals or discharges, and 

along the mainstem where permitted withdrawal or discharge 

values were large. During the data-collection effort, monitoring 

instruments were placed upstream and downstream of each of 

the 9 locations for a total of 18 continuous water-quality monitoring sites.

In addition to the continuous water-quality monitoring 

sites, 34 monitoring sites were selected for instantaneous 

water-quality data collection. It was desirable to sample as 

many sites on the river as possible in order to document longitudinal variations in water quality. Geographic constraints limited the number of sites available for instantaneous water-quality measurements; however, bridges, boat ramps, local parks, 

and some private property served as access points for the instantaneous water-quality monitoring sites. All available access 

points were included in the study.

Location information for continuous and instantaneous 

water-quality monitoring sites is in table 1 and figure 2. Site 

numbers increase in the downstream direction, with site 1 being 

the most upstream site and site 52 the most downstream site.

Instrumentation

All instruments used for collection of water-quality field 

parameters were of the YSI-6 series, and contain sensors with 

identical specifications (table 2). Instruments used for continuous data collection were YSI 600XLM and YSI 6920 models; 

instruments used for instantaneous data collection were YSI 

600XL models. The instruments contain sensors for measuring 

dissolved oxygen, pH, specific conductance, and temperature. 

All instruments were checked for temperature accuracy in the 

office before the field data collection began, and again after 

field data collection was completed. Water temperature was 

accurate within 0.5oC of a calibrated analog thermometer at 

near-freezing temperature and at room temperature. 

Water-quality monitoring instruments used for continuous 

monitoring were calibrated for dissolved oxygen and pH, and 

compared against standards for specific conductance immediately prior to field deployment. Monitors used for instantaneous 

sampling were calibrated in the same manner prior to field 

deployment, and calibrated twice daily during field data collection.

Water-Quality Field Parameters

 The water-quality parameters measured at both continuous and instantaneous monitoring sites were dissolved oxygen, 

pH, specific conductance, and water temperature. Additionally, 

air temperature and barometric pressure were measured at 

instantaneous monitoring sites. Study methods were designed 

so that the associated parameters were measured concurrently 

with the expected maximum and minimum dissolved-oxygen 

concentrations for each site; associated parameter values, therefore, do not necessarily represent maximum and minimum values. USGS protocols were followed for sampling-equipment 

cleaning, calibration, and data collection (U.S. Geological Survey, 1997).

Figure 3. Streamflow in July 1999 for 3 streamflow-gaging stations on the North Fork Shenandoah River, Virginia.

01643000 North Fork Shenandoah River near Strasburg, Va.

01633000 North Fork Shenandoah River at Mount Jackson, Va.

01632000 North Fork Shenandoah River at Cootes Store, Va.

0.1

1

10

100

1,000

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31

DAY IN JULY 1999

DISCHARGE, IN CUBIC FEET PER SECOND
Methods of Study 7

Site number

(Fig. 2) Site name Latitude

DMS.S (NAD27)

Longitude

DMS.S (NAD27)

1 At Cootes Store, Va. N 383813.6 W 0785110.1

2 At Evans Ford near Cootes Store, Va. N 383759.8 W 0785032.3

3 Along Route 789 near Cootes Store, Va. N 383728.0 W 0784915.2

4 At Route 617 at Broadway, Va. N 383715.9 W 0784807.1

5 At Route 411 at Broadway, Va. N 383710.9 W 0784743.9

6 At Route 411 at Broadway, Va. N 383711.0 W 0784743.9

7 Below Linville Creek at Broadway, Va. N 383714.6 W 0784728.3

8 At dam at Timberville, Va. N 383738.2 W 0784659.5

9 Below dam at Timberville, Va. N 383740.5 W 0784702.5

10 At Memorial Park at Timberville, Va. N 383810.0 W 0784651.3

11 Route 42 at Timberville, Va. N 383815.2 W 0784625.8

12 Above Shenville farm at Timberville, Va. N 383820.3 W 0784511.4

13 Below Shenville farm at Timberville, Va. N 383833.0 W 0784508.4

14 Below Shenville farm at Timberville, Va. N 383834.7 W 0784507.9

15 At Route 617 at New Market, Va. N 383906.5 W 0784152.9

16 Along Route 617 at New Market, Va. N 383938.3 W 0784113.6

17 Along Route 736 at Quicksburg, Va. N 384044.1 W 0784038.4

18 Along Route 767 at Quicksburg, Va. N 384113.5 W 0783950.2

19 Above Holmans Creek near Quicksburg, Va. N 384159.2 W 0783923.4

20 Below Holmans Creek near Quicksburg, Va. N 384159.9 W 0783920.8

21 At Route 720 near Mount Jackson, Va. N 384314.9 W 0783920.5

22 At Route 11 at Mount Jackson, Va. N 384349.0 W 0783843.2

23 At Mount Jackson, Va. N 384444.3 W 0783821.7

24 At Mount Jackson, Va. N 384445.2 W 0783820.6

25 At Route 707 near Mount Jackson, Va. N 384656.3 W 0783602.9

26 At Route 698 at Edinburg, Va. N 384830.2 W 0783358.4

27 Above Stoney Creek at Edinburg, Va. N 384920.0 W 0783254.6

28 Below Stoney Creek at Edinburg, Va. N 384927.4 W 0783259.9

29 Above dam at Edinburg, Va. N 384951.4 W 0783242.9

30 Below dam at Edinburg, Va. N 384949.8 W 0783240.5

31 Along Route 673 near Edinburg, Va. N 384941.7 W 0783125.8

32 Above Narrow Passage Creek at Route 672 N 385041.1 W 0783155.7

33 Near boat ramp at Narrow Passage Creek N 385043.4 W 0783147.6

34 Below Narrow Passage Creek near Edinburg Va. N 385047.7 W 0783142.3

35 At Route 609 near Woodstock, Va. N 385135.6 W 0783002.7

36 At Lupton Road at Woodstock, Va. N 385217.4 W 0782935.3

37 Above Spring Hollow Creek at Woodstock, Va. N 385306.9 W 0782848.0

38 Below Spring Hollow Creek at Woodstock, Va. N 385312.7 W 0782845.5

39 At Route 663 at Woodstock, Va. N 385410.2 W 0782852.5

40 Along Rittenour Ridge near Woodstock, Va. N 385412.4 W 0782715.2

41 At Route 661 near Woodstock, Va. N 385443.1 W 0782739.1

42 At Route 654 near Maurertown, Va. N 385434.7 W 0782535.3

43 Along Route 648 near Fishers Hill, Va. N 385706.3 W 0782259.5

44 Along Route 644 near Fishers Hill, Va. N 385725.9 W 0782300.2

Table 1. Locations of water-quality monitoring sites on the North Fork Shenandoah River, Virginia.

[Bold text indicates continuous water-quality monitoring sites; plain text indicates instantaneous monitoring sites; 

DMS.S, degrees minutes decimal-seconds; NAD27, North American datum of 1927]
8 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

45 At Route 744 near Fishers Hill, Va. N 385714.6 W 0782232.1

46 At Route 648 at Strasburg, Va. N 385903.9 W 0782203.1 

47 Near Strasburg, Va. N 385837.4 W 0782011.5

48 Above Cedar Creek near Strasburg, Va. N 385858.2 W 0781904.0

49 Below Cedar Creek near Strasburg, Va. N 385900.8 W 0781857.1

50 Above Winchester Dam at Waterlick, Va. N 385852.7 W 0781726.1

51 Below Winchester Dam at Waterlick, Va. N 385849.4 W 0781723.7

52 Above Passage Creek at Waterlick, Va. N 385835.6 W 0781613.3

Site number

(Fig. 2) Site name Latitude

DMS.S (NAD27)

Longitude

DMS.S (NAD27)

Table 1. Continued.

Water-quality

field parameter Range1 Accuracy1

Temperature -5–45 oC ± 0.15 oC

Specific conductance 0–100 mS/cm ± 0.5% reading + 0.001 mS/cm

pH 0–14 units ± 0.2 units

Dissolved oxygen, percent air 

saturation 0–500 % air sat 0–200 % air sat: ± 2 % reading or 2 % air sat (the greater value)

200–500 % air sat: ± 6 % of reading

Dissolved oxygen, mg/L 0–50 mg/L 0–20 mg/L: ± 2 % of reading or 0.2 mg/L (the greater value)

20–50 mg/L: ± 6 % of reading

Table 2. Water-quality sampling instrument specifications used in the water-quality synoptic sampling on the North Fork Shenandoah River, Virginia.

[

o

C, degrees Celsius; mS/cm, millisiemens per centimeter; %, percent; air sat, air saturation; mg/L, milligrams per liter]

1From YSI Incorporated, 1998, Environmental Monitoring Systems operations manual: 6-series, Revision A, Yellow Springs, Ohio, 255 p.
Results of Water-Quality Synoptic Sampling 9

Continuous Water-Quality Field Measurements

Self-contained water-quality monitors and data loggers 

were used to measure and record dissolved oxygen, pH, specific 

conductance, and water temperature at 18 continuous monitoring sites. Most continuous monitoring sites were within 500 ft 

of a permitted withdrawal or discharge; however, some continuous monitoring sites were located on either end of a stream 

reach with numerous permitted sites to assess water quality 

upstream and downstream of the reach. At each continuous 

water-quality monitoring site, a YSI 600XLM or YSI 6920 

multi-parameter instrument was housed within a section of 

polyvinylchloride (PVC) pipe that was secured to the stream 

bottom. The water-quality monitor was placed in the centroid of 

flow, with the sensors elevated above the streambed and other 

obstructions to flow such as large boulders and logs. The average depth of all continuous monitoring sites was 2.3 ft, and the 

median depth was 1.7 ft. Because the water was shallow, elevating the sensors above the streambed and any obstructions 

placed them approximately in the flowing portion of the water 

column. At the few sites that were greater than 3 ft deep, the 

water-quality monitor was placed 1–3 ft below the water surface.

Water-quality data were collected semi-hourly (every 30 

minutes, on the hour and half-hour) for 1–8 days during July 

12–30, 1999. Maximum and minimum dissolved-oxygen concentrations were taken from the semi-hourly data for each of the 

18 sites. These data represent the greatest (MAX) and least 

(MIN) semi-hourly dissolved-oxygen concentrations recorded 

during the study period, but are not necessarily values that were 

measured on the same day. Instead, these values are the upper 

and lower limits of the range of measured concentrations.

Instantaneous Water-Quality Field Measurements

Hand-held water-quality monitors were used to measure 

dissolved oxygen, pH, specific conductance, and water temperature at 34 sites along the river. Air temperature and barometric 

pressure also were measured and recorded at these sites. 

Water-quality data were collected once in the early morning 

(AM) and once in the late afternoon (PM) for each site from 

July 27-29, 1999. The data were collected just before sunrise 

and just before sunset when the daily minimum and maximum 

dissolved-oxygen concentrations would be expected, respectively. The study design did not allow for depth-integrated sampling along a cross section at each site, but the sampling was 

done in a part of the channel that was representative of streamflow. Water-quality measurements were made at approximately 

60 percent of water depth.

Results of Water-Quality Synoptic Sampling

Throughout this report, the order of the data is from site 1, 

near Cootes Store, Va., to site 52, the most downstream site, 

near the confluence of the North Fork Shenandoah River with 

Passage Creek. Maximum and minimum dissolved-oxygen 

concentrations and associated parameter values of pH, specific 

conductance, and water temperature from the continuous and 

instantaneous water-quality monitoring sites are in tables 3 and 

4. Maximum and minimum values for the associated parameters 

of pH, specific conductance, and water temperature not found 

in table 3 may be in the appendix, which contains the complete 

set of semi-hourly data for continuous monitoring sites. The 

longitudinal distribution of water-quality values is displayed on 

a map of the North Fork Shenandoah River Basin (figs. 4, 5, 6, 

8, 9, and 10). On these figures, the 52 study sites and associated 

water-quality data are divided into two sections, with sites 1-25 

in section A and sites 26-52 in section B. These divisions are 

arbitrary and were made for displaying the data.

Dissolved Oxygen

There were large variations in MIN and MAX values of 

dissolved-oxygen concentrations recorded with continuous 

measurement techniques, as well as in AM and PM values 

recorded with instantaneous measurement techniques. Dissolved-oxygen concentrations from both continuous and instantaneous water-quality monitoring sites ranged from 2.1 mg/L to 

16.4 mg/L; dissolved oxygen as percent air saturation ranged 

from 25 to 204 percent (figs. 4 and 5, tables 3 and 4). The State 

numerical criterion for the minimum concentration of dissolved 

oxygen in Piedmont and Mountainous zones is 4.0 mg/L (State 

Water Control Board, 2002). State water-quality criteria are 

designed to maintain water-quality conditions conducive to 

healthy aquatic communities. Dissolved-oxygen concentrations 

were equal to or less than the State water-quality minimum at 

18 of 52 monitoring sites; all 18 sites were in the upper and middle portions of the river, where more than half of the first 34 

sites had minimum dissolved-oxygen concentrations equal to or 

less than 4.0 mg/L (fig. 4). No dissolved-oxygen concentrations 

less than the State minimum were recorded downstream of site 

34 near Narrow Passage Creek (fig. 4).

The results from continuous sampling (MIN and MAX 

values) and instantaneous sampling (AM and PM values) were 

compared. To compare the values that approximate the daily 

minimum dissolved-oxygen concentration, a Wilcoxon twosample ranked sum test (Ott and Longnecker, 2001) of the MIN 

and AM datasets was completed. The mean of the MIN dataset 

was 4.4 mg/L, and the median was 4.7 mg/L; the mean of the 

AM dataset was 4.9 mg/L, and the median was 4.7 mg/L. 

Results from the Wilcoxon test showed no significant difference between the two datasets (p-value = 0.8099). To compare 

the values that approximate the daily maximum dissolved-oxygen concentration, a Wilcoxon two-sample ranked sum test of 

the MAX and PM datasets was completed. The mean of the PM 

dataset was 11.0 mg/L, and the median also was 11.0 mg/L; the 

mean of the MAX dataset was 12.0 mg/L, and the median was 

12.9 mg/L. Results from the Wilcoxon test showed no significant difference between the two datasets (p-value = 0.4901).
Site number (Fig. 2) Begin date Begin time (local) End date End time (local) Water depth (ft) Statistic Date Time (local) DOsat (percent) DO (mg/L) DO1 (ratio) pH (standard units) 

6 07/29/1999 14:30 07/30/1999 10:00 1.5 MIN 07/30/1999 07:30 43.7 3.7 3.4 7.7 

MAX 07/29/1999 18:00 162.6 12.7 8.5 

13 07/29/1999 12:00 07/30/1999 9:30 1.7 MIN 07/30/1999 03:00 32.9 2.7 6.1 – 

MAX 07/29/1999 14:30 203.5 16.4 – 

19 07/15/1999 11:30 07/20/1999 12:00 2.0 MIN 07/20/1999 06:00 26.2 2.2 6.8 7.6 

MAX 07/18/1999 13:30 192.9 15.0 8.8 

20 07/15/1999 12:30 07/20/1999 12:00 2.1 MIN 07/20/1999 06:00 36.8 3.1 4.9 7.7 

MAX 07/18/1999 13:30 198.0 15.3 8.9 

22 07/28/1999 14:30 07/30/1999 8:30 2.8 MIN 07/29/1999 09:30 29.6 2.5 2.6 7.6 

MAX 07/28/1999 17:30 79.7 6.5 8.0 

23 07/28/1999 13:00 07/30/1999 8:00 2.1 MIN 07/30/1999 06:30 50.5 4.3 2.4 7.8 

MAX 07/28/1999 15:00 127.8 10.3 8.4 

27 07/26/1999 16:30 07/28/1999 7:30 1.4 MIN 07/27/1999 08:00 57.7 5.0 3.2 7.7 

MAX 07/27/1999 17:30 198.5 15.9 8.6 

28 07/26/1999 16:00 07/28/1999 7:30 1.5 MIN 07/27/1999 07:30 53.9 4.7 3.1 7.8 

MAX 07/27/1999 17:30 178.6 14.4 8.7 

29 07/26/1999 15:00 07/28/1999 8:00 10.0 MIN 07/27/1999 17:00 68.1 5.7 2.3 7.9 

MAX 07/27/1999 22:00 157.5 13.1 8.5 

30 07/26/1999 14:30 07/28/1999 8:00 2.2 MIN 07/27/1999 07:30 83.3 7.1 1.3 8.0 

MAX 07/27/1999 15:00 105.4 9.0 8.1 

32 07/12/1999 19:00 07/20/1999 16:00 0.6

MIN 07/14/1999 07:30 36.7 3.2

4.5

8.3 

MAX 07/19/1999 17:30 181.6 14.4 8.8 

34 07/12/1999 18:30 07/20/1999 15:00 0.5

MIN 07/20/1999 08:00 57.6 4.8

2.8

8.2 

MAX 07/16/1999 17:30 168.0 13.4 8.8 

37 07/21/1999 11:00 07/27/1999 9:00 2.0

MIN 07/26/1999 07:00 59.4 4.7

2.1

8.4 

MAX 07/26/1999 18:30 132.9 10.0 8.8 

38 07/21/1999 11:30 07/27/1999 9:30 1.6

MIN 07/24/1999 04:00 62.4 4.9

1.9

8.4 

MAX 07/26/1999 18:00 124.0 9.4 8.7 

Table 3. Minimum and maximum dissolved-oxygen concentrations and associated water-quality parameter values from continuous monitoring sites on the North Fo[MIN, minimum dissolved-oxygen concentration; MAX, maximum dissolved-oxygen concentration; 

o

C, degrees Celsius; DOsat, dissolved oxygen as percent air satura

mg/L, milligrams per liter; SC, specific conductance; μS/cm, microsiemens per centimeter; –, no data]
48 07/27/1999 15:00 07/29/1999 8:30 –

MIN 07/29/1999 07:30 69.6 5.7

1.5

9.2 

MAX 07/28/1999 13:00 111.4 8.6 9.3 

49 07/27/1999 15:30 07/29/1999 8:30 1.6

MIN 07/29/1999 07:30 71.9 5.9

1.5

9.1 

MAX 07/28/1999 13:00 113.1 8.8 9.2 

50 07/28/1999 14:00 07/30/1999 8:30 4.4

MIN 07/29/1999 10:00 66.8 5.5

1.8

8.9 

MAX 07/29/1999 21:30 123.0 9.7 9.1 

51 07/29/1999 9:30 07/30/1999 9:00 1.5

MIN 07/29/1999 10:00 77.9 6.4

1.4

8.9 

MAX 07/29/1999 22:30 113.5 8.9 9.1 

Site

number

(Fig. 2)

Begin

date

Begin 

time 

(local)

End

date

End

time

(local)

Water 

depth

(ft)

Statistic Date Time (local) DOsat (percent) DO (mg/L) DO1 (ratio) pH (standard units) 

Table 3. Continued.

1Calculated by dividing the maximum dissolved-oxygen concentration by the minimum dissolved-oxygen concentration
Site number (Fig. 2) Statistic Date Time (local) DOsat (percent) DO (mg/L) DO1 (ratio) pH (standard units) SC (μS/cm) Water temperature (oC) 

tem

1 AM 07/27/1999 04:20 62.8 5.1 1.9 7.7 185 25.84 

PM 07/27/1999 14:49 126.9 9.9 8.2 178 28.46 

2 AM 07/27/1999 04:26 71.9 6.0 1.6 7.7 278 24.14 

PM 07/27/1999 14:55 129.5 9.9 8.2 307 29.13 

3 AM 07/27/1999 04:59 54.1 4.4 1.1 7.6 301 25.77 

PM 07/27/1999 15:08 61.7 5.0 7.8 255 26.54 

4 AM 07/27/1999 05:15 70.5 5.7 1.6 7.9 274 25.24 

PM 07/27/1999 15:17 122.0 9.3 8.8 244 29.42 

5 AM 07/27/1999 05:25 44.3 3.6 2.4 7.8 284 25.01 

PM 07/27/1999 15:23 111.0 8.7 8.3 281 28.06 

7 AM 07/27/1999 05:46 41.8 3.5 3.4 7.8 365 24.62 

PM 07/27/1999 15:28 149.6 11.8 8.4 360 27.79 

8 AM 07/27/1999 06:07 82.0 6.7 1.8 7.9 308 25.66 

PM 07/27/1999 15:52 150.7 11.8 8.5 343 27.78 

9 AM 07/27/1999 06:15 72.3 5.9 – 7.9 426 25.74 

PM – – – – – – – 

10 AM 07/27/1999 06:32 43.0 3.6 3.9 7.8 778 25.21 

PM 07/27/1999 16:13 184.5 14.0 8.5 856 29.84 

11

AM 07/28/1999 04:12 97.1 7.8

1.3

8.2 663 26.49 

PM 07/27/1999 16:26 132.7 10.3 8.5 648 28.36 

12

AM 07/27/1999 07:05 30.9 2.6

3.8

7.8 780 24.11 

PM 07/27/1999 16:40 126.8 9.8 8.5 780 29.38 

14

AM 07/27/1999 07:17 25.1 2.1

3.0

7.7 756 23.78 

PM 07/27/1999 16:46 80.8 6.3 8.2 730 28.06 

15

AM 07/28/1999 04:21 49.2 4.3

2.9

7.8 544 22.67 

PM 07/27/1999 17:04 150.8 12.3 8.4 510 25.62 

16

AM 07/28/1999 04:30 47.7 4.0

2.8

7.7 462 24.27 

PM 07/27/1999 17:14 139.0 11.0 8.4 510 27.32 

Table 4. Early morning and late afternoon dissolved-oxygen concentrations and associated water-quality parameter values from instantaneous monitoring sitShenandoah River, Virginia.[AM, early morning dissolved-oxygen concentration; PM, late afternoon dissolved-oxygen concentration; 

o

C, degrees Celsius; DOsat, dissolved oxygen as percen

solved oxygen; mg/L, milligrams per liter; mm Hg, millimeters of mercury; SC, specific conductance; μS/cm, microsiemens per centimeter; –, no data]
17

AM 07/28/1999 04:40 65.0 5.3

2.0

7.9 514 25.47 

PM 07/27/1999 17:32 137.6 10.8 8.4 516 27.93 

18

AM 07/28/1999 04:50 47.1 3.9

2.5

7.8 482 25.58 

PM 07/29/1999 14:30 120.8 9.8 8.3 496 24.31 

21

AM 07/28/1999 05:08 33.3 2.7

3.3

7.7 458 25.41 

PM 07/29/1999 14:42 112.1 9.0 8.3 432 26.62 

24

AM 07/28/1999 05:28 41.0 3.4

3.5

7.8 447 24.56 

PM 07/29/1999 14:55 150.9 12.1 8.4 430 26.39 

25

AM 07/28/1999 05:46 27.7 2.3

3.4

7.8 444 25.30 

PM 07/29/1999 15:10 98.3 7.9 8.3 422 26.82 

26

AM 07/28/1999 05:50 39.7 3.8

3.5

7.7 464 17.00 

PM 07/29/1999 15:26 149.9 13.3 8.3 232 21.13 

31

AM 07/28/1999 06:18 64.4 5.5

2.2

7.8 456 22.87 

PM 07/29/1999 15:38 152.0 12.1 8.6 448 27.02 

33

AM 07/28/1999 06:29 45.5 3.7

3.3

8.1 452 25.38 

PM 07/29/1999 16:02 154.9 12.3 8.6 440 27.06 

35

AM 07/28/1999 05:50 51.4 4.2

3.0

7.9 427 25.83 

PM 07/29/1999 16:20 166.4 12.6 8.9 413 29.79 

36

AM 07/28/1999 05:40 73.6 5.9

2.0

8.5 419 26.88 

PM 07/29/1999 16:35 151.6 11.9 8.8 409 28.04 

39

AM 07/28/1999 05:10 95.2 7.5

1.3

8.9 437 27.59 

PM 07/29/1999 16:00 124.1 9.7 8.8 434 27.85 

40

AM 07/28/1999 04:40 60.5 4.9

3.0

8.9 440 26.35 

PM 07/29/1999 15:45 189.1 14.5 9.1 426 29.19 

41

AM 07/28/1999 04:15 58.0 4.7

3.3

8.6 455 26.23 

PM 07/29/1999 15:35 202.2 15.3 9.3 416 29.74 

42

 AM 07/27/1999 06:40 76.0 6.1

1.7

9.3 412 26.92 

PM 07/27/1999 17:40 132.4 10.3 9.0 445 28.21 

43

AM 07/27/1999 05:50 68.8 5.6

2.0

8.9 425 25.95 

PM 07/27/1999 17:10 149.5 11.4 9.6 390 29.52 

Site

number

(Fig. 2)

Statistic Date Time (local) DOsat (percent) DO (mg/L) DO1 (ratio) pH (standard units) SC (μS/cm) Water temperature (oC) 

tem

Table 4. Continued.
44 AM 07/27/1999 05:58 56.4 4.5 2.8 9.0 417 26.47 

PM 07/27/1999 17:15 163.2 12.5 9.5 392 29.48 

45 AM 07/27/1999 05:30 55.1 4.4 3.3 9.0 415 26.78 

PM 07/27/1999 17:00 193.2 14.6 9.5 392 30.14 

46 AM 07/27/1999 05:05 87.9 7.0 1.5 9.3 397 27.41 

PM 07/27/1999 16:40 132.2 10.3 9.3 400 28.45 

47 AM 07/27/1999 04:40 58.7 4.7 3.0 9.1 413 26.39 

PM 07/27/1999 16:21 184.2 14.0 9.5 405 29.58 

52 AM 07/27/1999 04:20 73.6 5.8 1.5 8.9 403 27.15 

PM 07/27/1999 16:05 111.2 8.6 9.0 414 28.82 

Site number (Fig. 2) Statistic Date Time (local) DOsat (percent) DO (mg/L) DO1 (ratio) pH (standard units) SC (μS/cm) Water temperature (oC) 

tem

Table 4. Continued. 1Calculated by dividing the late afternoon dissolved-oxygen concentration by the early morning dissolved-oxygen concentration
Front Royal

DISSOLVED-OXYGEN CONCENTRATION, IN MILLIGRAMS PER LITER

Edinburg

0

2

4

6

8

10

12

14

16

18

DATA FROM CONTINUOUS MONITORING SITES

EXPLANATION

Instantaneous

Continuous

Maximum value

Minimum value

Expected range of values

DATA FROM INSTANTANEOUS MONITORING SITES

MONITORING SITE

Early morning measurement

Late afternoon measurement

STATE WATER-QUALITY MINIMUM CRITERION

FOR PIEDMONT AND MOUNTAINOUS ZONES

Expected range

Cootes Store

Mount Jackson

0

2

4

6

8

10

12

14

16

18

North

River

Shenandoah

Fork

Creek

Linville

Creek

Creek

Smith

North

River

Shenandoah

Fork

Creek

Passage

Creek

Cedar

Stony

Creek

Holmans

Narrow

Passage

Creek

Spring

Hollow

Creek

0 2.5 5 MILES

0 2.5 5 KILOMETERS

B

A

N

N

Results of Water-Quality Synoptic Sampling 15

Figure 4. Dissolved-oxygen concentrations at water-quality monitoring sites in sections A and B of the North Fork

Shenandoah River, Virginia.
Holmans

0 2.5 5 MILES

0 2.5 5 KILOMETERS

Front Royal

Cootes Store

Mount Jackson

Edinburg

DISSOLVED OXYGEN, PERCENT AIR SATURATION

B

0

50

100

150

200

250

0

50

100

150

200

250

A

N

North

River

Shenandoah

Fork

Creek

Linville

Creek

Creek

Smith

North

River

Shenandoah

Fork

Creek

Passage

Creek

Cedar

Stony

Creek

Narrow

Passage

Creek

Spring

Hollow

Creek

N

DATA FROM CONTINUOUS MONITORING SITES

EXPLANATION

Instantaneous

Continuous

Maximum value

Minimum value

Expected range of values

DATA FROM INSTANTANEOUS MONITORING SITES

MONITORING SITE

Early morning measurement

Late afternoon measurement

Expected range

16 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

Figure 5. Dissolved-oxygen as percent air saturation at water-quality monitoring sites in sections A and B of the

North Fork Shenandoah River, Virginia.
Results of Water-Quality Synoptic Sampling 17

Although there were no significant differences between 

datasets, the range of values recorded during the continuous 

sampling (2.2–16.4 mg/L) was greater than the range of values 

from the instantaneous sampling (2.1–15.3 mg/L). The dissolved-oxygen ratios (fig. 6) represent the maximum dissolved-oxygen concentration divided by the minimum dissolved-oxygen concentration at each monitoring site. The larger 

the ratio, the greater the difference between the maximum and 

minimum dissolved-oxygen concentrations. Ratios can be used 

to compare daily fluctuations of dissolved-oxygen concentrations.

At continuous water-quality monitoring sites, dissolved-oxygen concentrations fluctuated as much as 10 mg/L 

per day, and typically fluctuated at least 5 mg/L per day during 

the study period. The daily fluctuations of dissolved-oxygen 

concentrations for selected pairs of continuous water-quality 

monitoring sites (sites 19 and 20, 32 and 34, and 37 and 38) are 

illustrated (fig. 7 and app.). At instantaneous water-quality 

monitoring sites, the mean daily fluctuation of dissolved-oxygen concentrations was approximately 6 mg/L. Daily fluctuations of dissolved-oxygen concentrations have been recently 

documented on the Colorado River below Glen Canyon Dam, 

Ariz. (Flynn and others, 2001), on the White River near Sumner, Wash. (Ebbert, 2003), and on six rivers within south-central Texas (Ging and Otero, 2003). The previously mentioned 

studies report daily fluctuations in the range of 5 mg/L. Photosynthesis and respiration of the benthic organisms affect the 

daily fluctuation of dissolved-oxygen concentration and pH in 

rivers (Hem, 1989; Marzolf and others, 1999; Flynn and others, 

2001). Summer low flows and high water temperatures on the 

North Fork Shenandoah River may have contributed to excessive algal growth, which may affect the wide range of daily 

fluctuation of dissolved-oxygen concentrations.

pH

At all sites, pH was slightly alkaline, with values ranging 

from 7.6 to 9.6 (fig. 8, tables 3 and 4). The greatest pH values 

were found between sites 40 and 52 in the Seven Bends area of 

the river (fig. 2). The State numerical criteria for the minimum 

and maximum values of pH in Piedmont and Mountainous 

zones are 6.0 and 9.0, respectively (State Water Control Board, 

2002). Upstream of site 40, at Rittenour Ridge (fig. 2), all measured pH values were less than 9.0, but from Rittenour Ridge 

downstream to site 52, pH values greater than 9.0 were measured at all sites (fig. 8). Most semi-hourly values from continuous water-quality monitoring sites were less than 9.0, but at 

sites 48, 49, 50, and 51, pH values greater than 9.0 were measured on multiple days (app.). River water generally has a pH in 

the range of 6.5–8.5 (Hem, 1989). When photosynthesis by 

aquatic organisms takes up dissolved carbon dioxide during the 

day, and the organisms release carbon dioxide at night through 

respiration, pH fluctuation may occur, and the maximum pH 

value can reach as high as 9.0 (Stumm and Morgan, 1981; Hem, 

1989). On the White River near Sumner, Wash., the minimum 

and the maximum pH values ranged from approximately 7.5 to 

8.5 daily in September and October 2002 (Ebbert, 2003). As 

turbidity increased in the White River, the daily fluctuation of 

pH decreased, demonstrating the effect photosynthesis has on 

daily fluctuation of pH in streams (Ebbert, 2003). On the North 

Fork Shenandoah River, the karst topography over the limestone and dolomite rocks may contribute to the greater pH of 

river water in this area, but the maximum pH values measured 

were likely affected by photosynthesis and respiration as well.

Specific Conductance

Specific-conductance values from both continuous and 

instantaneous water-quality monitoring sites ranged from 178 

to 856 μS/cm (fig. 9). No State numerical criteria have been 

established for specific-conductance values. Most specific-conductance values were less than 550 μS/cm. From sites 10 to 14, 

specific-conductance values were greater than 600 μS/cm, and 

ranged from 648 to 856 μS/cm. Daily fluctuations of specific 

conductance of 10 to 30 μS/cm were typical at continuous and 

instantaneous water-quality monitoring sites.

Temperature

Air and water temperature serve as a reference to climactic 

conditions during the study period. Air temperature data were 

collected only from the 34 instantaneous water-quality monitoring sites. Air temperatures ranged from 21.0 to 37.0oC (table 4). 

These air temperatures are typical for summer months in this 

region. Water temperatures from both continuous and instantaneous water-quality monitoring sites ranged from 17.00 to 

30.14oC (fig. 10, tables 3 and 4). As would be expected during 

a summer low-flow period, water temperature was above 25oC 

at least once at 50 sites. The State numerical criterion for the 

maximum water temperature in Piedmont and Mountainous 

zones is 31.0oC (State Water Control Board, 2002). All measured water temperatures were below 31.0oC (fig. 10), except 

for some of the semi-hourly values collected at continuous 

water-quality monitoring site 37, where a maximum water temperature of 31.10oC was measured on July 23, 1999 (app.). The 

complete range of values from the semi-hourly temperature 

dataset is reported in the appendix. A water temperature of 

17.00oC was measured at site 26, an instantaneous monitoring 

site (section B, fig. 10). This value is less than all other measured water temperatures; however, during field data collection 

it was noted that a spring discharged to the river at this site. 

Because ground-water temperatures are typically colder than 

surface-water temperatures in the summer, it is likely that the 

water temperature measured at site 26 was affected by groundwater discharge from the spring.
Ratio (late afternoon concentration divided 

by early morning concentration)

ND No data (site 9)

Ratio (maximum divided by minimum 

concentration)

EXPLANATION

ND

Instantaneous

Continuous

MONITORING SITE

North

River

Shenandoah

Fork

Creek

Passage

Creek

Cedar

Stony

Creek

Front Royal

Edinburg

RATIOS OF DISSOLVED-OXYGEN CONCENTRATIONS

DATA FROM CONTINUOUS MONITORING SITES

DATA FROM INSTANTANEOUS MONITORING SITES

Cootes Store

Mount Jackson

N

0 2.5 5 MILES

0 2.5 5 KILOMETERS

B

A

North

River

Shenandoah

Fork

Creek

Linville

Creek

Holmans

Creek

Smith

0

1

2

3

4

5

6

7

8

0

1

2

3

4

5

6

7

8 Narrow

Passage

Creek

Spring

Hollow

Creek

N

18 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

Figure 6. Ratios of dissolved-oxygen concentrations at water-quality monitoring sites in sections A and B of the

North Fork Shenandoah River, Virginia.
Sites 32 and 34

Near the confluence of Narrow Passage Creek and the North Fork Shenandoah River

Sites 19 and 20

Near the confluence of Holmans Creek and the North Fork Shenandoah River

(B)

(A)

(C)

0

2

4

6

8

10

12

14

16

DAY IN JULY 1999

12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

0

2

4

6

8

10

12

14

16

DISSOLVED-OXYGEN CONCENTRATION, IN MILLIGRAMS PER LITER

Sites 37 and 38

Near the confluence of Spring Hollow Creek and the North Fork Shenandoah River

0

2

4

6

8

10

12

14

16

Downstream site

Upstream site 

SEMI-HOURLY DATA

Downstream site

Upstream site 

SEMI-HOURLY DATA

Downstream site

Upstream site 

SEMI-HOURLY DATA

Results of Water-Quality Synoptic Sampling 19

Figure 7. Dissolved-oxygen concentrations at three pairs of upstream and

downstream continuous water-quality monitoring sites along the North

Fork Shenandoah River, Virginia, during July 15-20 (A), July 12-20 (B),

and July 21-27 (C), 1999.
North

River

Shenandoah

Fork

Creek

Passage

Creek

Cedar

Stony

Creek

Front Royal

Edinburg

0 2.5 5 MILES

0 2.5 5 KILOMETERS DATA FROM CONTINUOUS MONITORING SITES

EXPLANATION

Instantaneous

Continuous

Maximum value

Minimum value

Expected range of values

DATA FROM INSTANTANEOUS MONITORING SITES

MONITORING SITE

Early morning measurement

Late afternoon measurement

STATE WATER-QUALITY MAXIMUM AND 

MINIMUM CRITERIA FOR PIEDMONT 

AND MOUNTAINOUS ZONES

Expected range

pH, IN STANDARD UNITS

4

5

6

7

8

9

10

Cootes Store

Mount Jackson

B

A

N

Holmans

North

River

Shenandoah

Fork

Creek

Linville

Creek

Creek

Smith

4

5

6

7

8

9

10

N

Narrow

Passage

Creek

Spring

Hollow

Creek

20 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

Figure 8. pH at water-quality monitoring sites in sections A and B of the North Fork Shenandoah River, Virginia.
Front Royal

Edinburg

0

100

200

300

400

500

600

700

800

900

SPECIFIC CONDUCTANCE, IN MICROSIEMENS PER CENTIMETER

Holmans

Cootes Store

Mount Jackson

N

North

River

Shenandoah

Fork

Creek

Linville

Creek

Creek

Smith

0 2.5 5 MILES

0 2.5 5 KILOMETERS

B

A

North

River

Shenandoah

Fork

Creek

Passage

Creek

Cedar

Stony

Creek

0

100

200

300

400

500

600

700

800

900 Narrow

Passage

Creek Spring

Hollow

Creek

N

DATA FROM CONTINUOUS MONITORING SITES

EXPLANATION

Instantaneous

Continuous

Maximum value

Minimum value

Expected range of values

DATA FROM INSTANTANEOUS MONITORING SITES

MONITORING SITE

Early morning measurement

Late afternoon measurement

Expected range

Results of Water-Quality Synoptic Sampling 21

Figure 9. Specific conductance at water-quality monitoring sites in sections A and B of the North Fork Shenandoah

River, Virginia.
Front Royal

Edinburg North

River

Shenandoah

Fork

Creek

Passage

Creek

Cedar

Stony

WATER TEMPERATURE, IN DE

Creek

GREES CELSIUS

0

5

10

15

20

25

30

35

0 2.5 5 MILES

0 2.5 5 KILOMETERS

B

A

N

N

Holmans

North

River

Shenandoah

Fork

Creek

Linville

Creek

Creek

Smith

Cootes Store

Mount Jackson

0

5

10

15

20

25

30

35

Narrow

Passage

Creek

Spring

Hollow

Creek

DATA FROM CONTINUOUS MONITORING SITES

EXPLANATION

Instantaneous

Continuous

Maximum value

Minimum value

Expected range of values

DATA FROM INSTANTANEOUS MONITORING SITES

MONITORING SITE

Early morning measurement

Late afternoon measurement

STATE WATER-QUALITY MAXIMUM CRITERION

FOR PIEDMONT AND MOUNTAINOUS ZONES

Expected range

22 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

Figure 10. Water temperature at water-quality monitoring sites in sections A and B of the North Fork Shenandoah

River, Virginia.
Summary and Conclusions 23

Summary and Conclusions

Increased demand for water resources, in conjunction with 

population growth, has brought about widespread concern 

about water availability within the North Fork Shenandoah 

River Basin, Virginia. In a rural basin with the potential for 

urban and industrial growth, the availability of a clean, abundant water supply is a primary concern. There is also concern 

for maintaining streamflows that are adequate to support the 

aquatic community, to support recreation, and to maintain aesthetic characteristics of the river. Mean monthly flows in July 

1999 recorded at three streamflow-gaging stations on the river 

were the lowest recorded in the past 55- to 74-year periods of 

record. Recent droughts have increased public awareness of the 

importance of a sustainable water supply and have increased 

demand for water-availability and water-quality information to 

assist with water-resources management in the basin.

In 1998, an Instream Flow Incremental Methodology 

(IFIM) study was initiated by the USGS, in cooperation with the 

Northern Shenandoah Valley Regional Commission and Virginia Polytechnic Institute and State University, to incorporate 

hydrologic information, habitat requirements of fish, and wateruse information into a comprehensive assessment of the water 

resources of the North Fork Shenandoah River Basin. As a part 

of the IFIM study, water-quality data were collected in July of 

1999 to provide information about water-quality conditions to 

which aquatic life are exposed during summer low-flow periods 

(defined as flows less than the 90-percent exceedance flow). 

The study focused on dissolved-oxygen concentrations because 

the variability of dissolved-oxygen concentrations can affect 

fish health.

Dissolved-oxygen concentration, pH, specific conductance, and water temperature were measured at 52 sites along 80 

mi of the North Fork Shenandoah River from Cootes Store, Va., 

to its confluence with Passage Creek, near Strasburg, Va. Maximum and minimum dissolved-oxygen concentrations were 

determined for 18 sites with continuous water-quality monitors. 

These data represent the greatest (MAX) and least (MIN) semihourly concentrations of dissolved oxygen recorded during the 

study period and are the upper and lower limits of the range of 

values measured. Dissolved-oxygen concentrations also were 

measured at 34 sites in the early morning (AM) and late afternoon (PM) with hand-held water-quality monitors to best 

approximate the daily minimum and daily maximum dissolvedoxygen concentrations, respectively.

Dissolved-oxygen concentrations ranged from 2.1 to 

16.4 mg/L. Dissolved oxygen as percent air saturation ranged 

from 25 to 204 percent. Daily fluctuations of dissolved-oxygen 

concentrations were at least 5 mg/L at each site. Dissolved-oxygen concentrations were equal to or less than the State waterquality minimum of 4.0 mg/L at 18 of 52 monitoring sites; all 

18 sites were in the upper and middle portions of the river, 

where more than half of the first 34 sites had minimum dissolved-oxygen concentrations equal to or less than 4.0 mg/L.

The pH was slightly alkaline at all sites, and ranged from 

7.6 to 9.6, with pH values greater than 9.0 measured at the 13 

sites farthest downstream. The State numerical criteria for the 

minimum and maximum values of pH in Piedmont and Mountainous zones are 6.0 and 9.0, respectively. One-hundred percent of pH values measured were greater than the State minimum, and 75 percent of pH values measured were less than the 

State maximum during the study period. More information is 

needed about the combined effects of geology, ground-water 

discharge to the river, primary production, and human impacts 

to the river, to determine the cause of the maximum pH values 

on the North Fork Shenandoah River. Specific-conductance 

values ranged from 178 to 856 μS/cm, with values greater than 

600 μS/cm measured at a group of 5 sites in the upper portion 

of the river. Air temperatures ranged from 21.0 to 37.0oC, and 

water temperatures ranged from 17.00 to 30.14oC. The State 

numerical criterion for the maximum water temperature in 

Piedmont and Mountainous zones is 31.0oC. At 51 sites, measured water temperatures were below 31.0oC.

Water-quality data in this report serve as baseline information on summer, extreme low-flow conditions on the North Fork 

Shenandoah River. The flows observed are not within the normal range of flows for summer months, and are in part the result 

of reduced precipitation over the previous 12 months. However, 

water-quality conditions vary seasonally and annually, depending on the hydrologic condition, and periodically, extremely 

low-flow conditions result. The dissolved-oxygen concentrations measured during this study showed great daily fluctuations, and were less than the State minimum criteria at 18 sites. 

pH values exceeded State numerical criteria for maximum 

value of pH at 13 sites. To understand the degree to which the 

water-quality conditions observed in this study are representative, and to understand how the water-quality conditions 

recorded in this study can affect the aquatic community, it 

would be best to have a comparable dataset from a summer 

period within a normal range of flows. Further study would be 

required to assess the duration of conditions similar to those 

reported in this study, and any changes in water-quality conditions that result from increased water withdrawals from the 

North Fork Shenandoah River.
24 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

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Appendix
28 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Site 6

7/29/1999 14:30:40 26.77 302 101.7 8.1 8.0

7/29/1999 15:00:40 26.93 302 100.6 8.0 8.0

7/29/1999 15:30:40 27.43 300 109.2 8.6 8.1

7/29/1999 16:00:40 27.41 301 115.6 9.1 8.2

7/29/1999 16:30:40 27.59 302 130.4 10.3 8.2

7/29/1999 17:00:40 27.72 304 132.4 10.4 8.3

7/29/1999 17:30:40 28.06 309 149.4 11.7 8.4

7/29/1999 18:00:40 28.12 316 162.6 12.7a 8.5

7/29/1999 18:30:40 28.41 316 158.1 12.3 8.5

7/29/1999 19:00:40 28.35 315 159.1 12.4 8.5

7/29/1999 19:30:40 28.41 310 161.0 12.5 8.6

7/29/1999 20:00:40 28.74 300 149.5 11.5 8.6

7/29/1999 20:30:40 29.29 269 113.5 8.7 8.6

7/29/1999 21:00:40 29.3 267 102.1 7.8 8.4

7/29/1999 21:30:40 29.16 265 93.7 7.2 8.3

7/29/1999 22:00:40 28.92 264 85.2 6.6 8.3

7/29/1999 22:30:40 28.62 265 81.9 6.3 8.3

7/29/1999 23:00:40 28.28 266 76.4 6.0 8.2

7/29/1999 23:30:40 27.91 268 70.4 5.5 8.1

7/30/1999 0:00:40 27.55 271 65.3 5.2 8.0

7/30/1999 0:30:40 27.19 273 61.2 4.9 7.9

7/30/1999 1:00:40 26.85 276 57.5 4.6 7.9

7/30/1999 1:30:40 26.54 279 54.4 4.4 7.8

7/30/1999 2:00:40 26.26 281 52.0 4.2 7.8

7/30/1999 2:30:40 26 283 49.8 4.0 7.8

7/30/1999 3:00:40 25.77 285 48.3 3.9 7.8

7/30/1999 3:30:40 25.55 286 47.4 3.9 7.8

7/30/1999 4:00:40 25.34 287 47.0 3.9 7.7

7/30/1999 4:30:40 25.15 289 46.8 3.9 7.7

7/30/1999 5:00:40 24.97 290 46.7 3.9 7.7

7/30/1999 5:30:40 24.82 291 46.3 3.8 7.7

7/30/1999 6:00:40 24.69 292 45.4 3.8 7.7

7/30/1999 6:30:40 24.58 293 44.5 3.7 7.7

7/30/1999 7:00:40 24.48 294 44.0 3.7 7.7

7/30/1999 7:30:40 24.4 295 43.7 3.7b 7.7

7/30/1999 8:00:40 24.38 296 44.9 3.8 7.7

7/30/1999 8:30:40 24.42 296 48.1 4.0 7.7

7/30/1999 9:00:40 24.41 297 50.9 4.3 7.7

7/30/1999 9:30:40 24.42 297 53.3 4.5 7.8

7/30/1999 10:00:40 24.71 297 60.7 5.0 7.8

Site 13

7/29/1999 12:00:40 24.11 761 136.3 11.4 –

7/29/1999 12:30:40 24.54 758 157.2 13.1 –

Appendix Continuous water-quality monitoring data for the North Fork Shenandoah River, Virginia

[See table 1 for site names and descriptions; see figure 2 for site locations; oC, degrees Celsius; SC, specific 

conductance; μS/cm, microsiemens per centimeter; DOsat, dissolved oxygen as percent air saturation; 

DO, dissolved oxygen; mg/L, milligrams per liter; –, no data]
Appendix 29

7/29/1999 13:00:40 24.76 750 167.7 13.9 –

7/29/1999 13:30:40 25.1 743 181.0 14.9 –

7/29/1999 14:00:40 25.45 730 197.9 16.2 –

7/29/1999 14:30:40 26.21 713 203.5 16.4a –

7/29/1999 15:00:40 27.26 703 205.0 16.2 –

7/29/1999 15:30:40 28.41 727 194.2 15.1 –

7/29/1999 16:00:40 28.68 729 188.1 14.5 –

7/29/1999 16:30:40 28.61 729 182.6 14.1 –

7/29/1999 17:00:40 28.6 726 181.5 14.0 –

7/29/1999 17:30:40 28.6 726 177.6 13.7 –

7/29/1999 18:00:40 28.52 725 171.8 13.3 –

7/29/1999 18:30:40 28.41 726 163.9 12.7 –

7/29/1999 19:00:40 27.97 733 150.3 11.8 –

7/29/1999 19:30:40 27.71 739 136.7 10.7 –

7/29/1999 20:00:40 27.52 746 121.1 9.5 –

7/29/1999 20:30:40 27.38 752 104.6 8.3 –

7/29/1999 21:00:40 27.26 760 88.6 7.0 –

7/29/1999 21:30:40 27.01 765 76.7 6.1 –

7/29/1999 22:00:40 26.72 772 68.3 5.5 –

7/29/1999 22:30:40 26.46 776 61.4 4.9 –

7/29/1999 23:00:40 26.27 782 55.5 4.5 –

7/29/1999 23:30:40 26.07 787 50.2 4.1 –

7/30/1999 0:00:40 25.82 791 46.2 3.8 –

7/30/1999 0:30:40 25.61 793 43.7 3.6 –

7/30/1999 1:00:40 25.59 798 40.5 3.3 –

7/30/1999 1:30:40 25.43 802 38.2 3.1 –

7/30/1999 2:00:40 25.2 801 35.9 3.0 –

7/30/1999 2:30:40 24.98 800 33.9 2.8 –

7/30/1999 3:00:40 24.75 800 32.9 2.7b –

7/30/1999 3:30:40 24.55 799 34.9 2.9 –

7/30/1999 4:00:40 24.35 797 34.7 2.9 –

7/30/1999 4:30:40 24.19 795 35.3 3.0 –

7/30/1999 5:00:40 24.06 794 35.2 3.0 –

7/30/1999 5:30:40 23.95 792 35.2 3.0 –

7/30/1999 6:00:40 23.81 791 37.7 3.2 –

7/30/1999 6:30:40 23.73 790 37.6 3.2 –

7/30/1999 7:00:40 23.69 788 40.4 3.4 –

7/30/1999 7:30:40 23.64 787 44.4 3.8 –

7/30/1999 8:00:40 23.63 786 48.4 4.1 –

7/30/1999 8:30:40 23.67 784 57.2 4.8 –

7/30/1999 9:00:40 23.75 782 62.3 5.3 –

7/30/1999 9:30:40 23.79 782 63.6 5.4 –

Site 19

7/15/1999 11:30:00 23.92 477 150.4 12.7 8.5

7/15/1999 12:00:40 24.37 460 161.9 13.5 8.6

7/15/1999 12:30:40 24.81 457 167.3 13.9 8.6

7/15/1999 13:00:40 25.24 453 172.0 14.1 8.7

7/15/1999 13:30:40 25.57 450 175.8 14.4 8.7

7/15/1999 14:00:40 25.86 447 178.2 14.5 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
30 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/15/1999 14:30:40 26.04 444 178.5 14.5 8.7

7/15/1999 15:00:40 26.22 441 178.3 14.4 8.7

7/15/1999 15:30:40 26.31 439 178.6 14.4 8.7

7/15/1999 16:00:40 26.27 437 175.1 14.1 8.7

7/15/1999 16:30:40 26.19 436 169.7 13.7 8.7

7/15/1999 17:00:40 25.96 437 159.9 13.0 8.6

7/15/1999 17:30:40 25.78 437 153.4 12.5 8.6

7/15/1999 18:00:40 25.51 440 141.7 11.6 8.6

7/15/1999 18:30:40 25.36 442 134.6 11.0 8.5

7/15/1999 19:00:40 25.24 444 130.1 10.7 8.5

7/15/1999 19:30:40 25.04 446 125.8 10.4 8.5

7/15/1999 20:00:40 24.75 449 115.0 9.5 8.4

7/15/1999 20:30:40 24.45 453 103.2 8.6 8.3

7/15/1999 21:00:40 24.22 457 93.8 7.9 8.2

7/15/1999 21:30:40 24.04 460 86.3 7.3 8.1

7/15/1999 22:00:40 23.91 462 80.6 6.8 8.1

7/15/1999 22:30:40 23.82 465 75.9 6.4 8.0

7/15/1999 23:00:40 23.75 466 72.2 6.1 8.0

7/15/1999 23:30:40 23.68 467 69.7 5.9 8.0

7/16/1999 0:00:40 23.63 468 68.1 5.8 8.0

7/16/1999 0:30:40 23.58 468 66.7 5.7 7.9

7/16/1999 1:00:40 23.53 469 65.7 5.6 7.9

7/16/1999 1:30:40 23.48 469 64.9 5.5 7.9

7/16/1999 2:00:40 23.44 470 63.9 5.4 7.9

7/16/1999 2:30:40 23.41 470 63.5 5.4 7.9

7/16/1999 3:00:40 23.36 471 62.4 5.3 7.9

7/16/1999 3:30:40 23.33 471 61.5 5.2 7.9

7/16/1999 4:00:40 23.27 472 60.6 5.2 7.9

7/16/1999 4:30:40 23.24 472 59.8 5.1 7.9

7/16/1999 5:00:40 23.18 472 58.5 5.0 7.9

7/16/1999 5:30:40 23.13 472 57.3 4.9 7.9

7/16/1999 6:00:40 23.08 473 56.1 4.8 7.9

7/16/1999 6:30:40 23.03 473 56.0 4.8 7.9

7/16/1999 7:00:40 23.02 473 58.4 5.0 7.9

7/16/1999 7:30:40 23.06 473 64.6 5.5 7.9

7/16/1999 8:00:40 23.13 472 73.6 6.3 8.0

7/16/1999 8:30:40 23.28 471 84.8 7.2 8.1

7/16/1999 9:00:40 23.50 470 97.8 8.3 8.2

7/16/1999 9:30:40 23.77 467 111.1 9.4 8.3

7/16/1999 10:00:40 24.08 465 123.7 10.4 8.3

7/16/1999 10:30:40 24.44 463 136.2 11.4 8.4

7/16/1999 11:00:40 24.84 460 147.4 12.2 8.5

7/16/1999 11:30:40 25.25 458 155.8 12.8 8.5

7/16/1999 12:00:40 25.66 455 163.7 13.4 8.6

7/16/1999 12:30:40 26.00 454 168.6 13.7 8.6

7/16/1999 13:00:40 26.47 451 175.5 14.1 8.7

7/16/1999 13:30:40 26.71 450 178.0 14.2 8.7

7/16/1999 14:00:40 26.82 449 176.3 14.1 8.7

7/16/1999 14:30:40 27.04 448 176.6 14.0 8.7

7/16/1999 15:00:40 27.21 447 179.2 14.2 8.7

7/16/1999 15:30:40 27.35 445 181.3 14.3 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 31

7/16/1999 16:00:40 27.47 445 181.7 14.3 8.7

7/16/1999 16:30:40 27.32 445 173.2 13.7 8.7

7/16/1999 17:00:40 27.34 445 172.1 13.6 8.7

7/16/1999 17:30:40 27.20 445 165.6 13.1 8.7

7/16/1999 18:00:40 27.07 445 160.9 12.8 8.6

7/16/1999 18:30:40 26.87 447 153.3 12.2 8.6

7/16/1999 19:00:40 26.69 449 144.3 11.6 8.6

7/16/1999 19:30:40 26.44 451 132.9 10.7 8.5

7/16/1999 20:00:40 26.14 455 119.9 9.7 8.4

7/16/1999 20:30:40 25.84 458 106.0 8.6 8.4

7/16/1999 21:00:40 25.58 461 93.9 7.7 8.3

7/16/1999 21:30:40 25.37 464 84.2 6.9 8.2

7/16/1999 22:00:40 25.22 466 76.9 6.3 8.1

7/16/1999 22:30:40 25.09 467 71.3 5.9 8.0

7/16/1999 23:00:40 24.98 468 66.3 5.5 8.0

7/16/1999 23:30:40 24.87 468 62.5 5.2 7.9

7/17/1999 0:00:40 24.77 469 59.5 4.9 7.9

7/17/1999 0:30:40 24.67 469 57.9 4.8 7.9

7/17/1999 1:00:40 24.61 469 56.8 4.7 7.9

7/17/1999 1:30:40 24.53 469 55.7 4.6 7.9

7/17/1999 2:00:40 24.46 469 54.2 4.5 7.9

7/17/1999 2:30:40 24.39 468 53.0 4.4 7.8

7/17/1999 3:00:40 24.32 468 52.6 4.4 7.8

7/17/1999 3:30:40 24.26 468 51.8 4.3 7.8

7/17/1999 4:00:40 24.19 468 50.4 4.2 7.8

7/17/1999 4:30:40 24.12 468 49.5 4.2 7.8

7/17/1999 5:00:40 24.06 468 48.9 4.1 7.8

7/17/1999 5:30:40 23.98 467 48.5 4.1 7.8

7/17/1999 6:00:40 23.93 467 48.2 4.1 7.8

7/17/1999 6:30:40 23.87 467 47.9 4.0 7.8

7/17/1999 7:00:40 23.84 466 50.7 4.3 7.8

7/17/1999 7:30:40 23.88 465 57.4 4.8 7.9

7/17/1999 8:00:40 23.97 464 67.2 5.7 7.9

7/17/1999 8:30:40 24.13 463 78.3 6.6 8.0

7/17/1999 9:00:40 24.35 461 91.1 7.6 8.1

7/17/1999 9:30:40 24.65 459 106.0 8.8 8.2

7/17/1999 10:00:40 25.00 456 120.4 9.9 8.3

7/17/1999 10:30:40 25.39 454 133.3 10.9 8.3

7/17/1999 11:00:40 25.80 451 145.4 11.8 8.4

7/17/1999 11:30:40 26.21 449 154.7 12.5 8.5

7/17/1999 12:00:40 26.62 447 163.0 13.1 8.5

7/17/1999 12:30:40 26.93 445 167.3 13.3 8.6

7/17/1999 13:00:40 27.20 443 169.8 13.5 8.6

7/17/1999 13:30:40 27.56 441 177.0 14.0 8.7

7/17/1999 14:00:40 27.76 440 177.1 13.9 8.7

7/17/1999 14:30:40 28.16 438 184.0 14.4 8.7

7/17/1999 15:00:40 28.29 438 183.0 14.2 8.7

7/17/1999 15:30:40 28.57 436 186.7 14.5 8.8

7/17/1999 16:00:40 28.67 436 186.1 14.4 8.8

7/17/1999 16:30:40 28.83 435 187.1 14.4 8.8

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
32 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/17/1999 17:00:40 28.94 434 185.7 14.3 8.8

7/17/1999 17:30:40 28.84 434 179.4 13.8 8.8

7/17/1999 18:00:40 28.69 435 171.2 13.2 8.7

7/17/1999 18:30:40 28.36 437 158.5 12.3 8.7

7/17/1999 19:00:40 28.04 440 143.7 11.2 8.6

7/17/1999 19:30:40 27.71 443 128.4 10.1 8.6

7/17/1999 20:00:40 27.41 448 110.8 8.8 8.5

7/17/1999 20:30:40 27.10 451 97.6 7.8 8.4

7/17/1999 21:00:40 26.82 454 87.6 7.0 8.3

7/17/1999 21:30:40 26.55 456 78.4 6.3 8.2

7/17/1999 22:00:40 26.30 457 70.4 5.7 8.1

7/17/1999 22:30:40 26.10 459 62.6 5.1 8.0

7/17/1999 23:00:40 25.95 460 58.1 4.7 7.9

7/17/1999 23:30:40 25.82 460 55.1 4.5 7.9

7/18/1999 0:00:40 25.71 461 52.6 4.3 7.9

7/18/1999 0:30:40 25.62 461 50.7 4.1 7.8

7/18/1999 1:00:40 25.54 462 49.8 4.1 7.8

7/18/1999 1:30:40 25.46 461 48.4 4.0 7.8

7/18/1999 2:00:40 25.38 460 47.1 3.9 7.8

7/18/1999 2:30:40 25.29 460 46.7 3.8 7.8

7/18/1999 3:00:40 25.19 460 45.1 3.7 7.8

7/18/1999 3:30:40 25.10 460 43.1 3.6 7.8

7/18/1999 4:00:40 25.03 460 42.2 3.5 7.8

7/18/1999 4:30:40 24.96 460 41.8 3.5 7.8

7/18/1999 5:00:40 24.88 459 40.9 3.4 7.8

7/18/1999 5:30:40 24.82 459 40.2 3.3 7.8

7/18/1999 6:00:40 24.74 459 38.7 3.2 7.7

7/18/1999 6:30:40 24.67 459 38.4 3.2 7.7

7/18/1999 7:00:40 24.64 458 40.0 3.3 7.7

7/18/1999 7:30:40 24.64 457 46.9 3.9 7.8

7/18/1999 8:00:40 24.71 457 57.4 4.8 7.8

7/18/1999 8:30:40 24.86 456 70.2 5.8 7.9

7/18/1999 9:00:40 25.05 454 83.0 6.9 8.0

7/18/1999 9:30:40 25.26 452 98.7 8.1 8.1

7/18/1999 10:00:40 25.53 450 112.8 9.2 8.2

7/18/1999 10:30:40 25.84 447 129.8 10.6 8.3

7/18/1999 11:00:40 26.20 444 145.0 11.7 8.4

7/18/1999 11:30:40 26.60 441 158.1 12.7 8.5

7/18/1999 12:00:40 27.03 438 168.4 13.4 8.6

7/18/1999 12:30:40 27.46 435 177.7 14.0 8.7

7/18/1999 13:00:40 27.84 433 185.6 14.6 8.7

7/18/1999 13:30:40 28.27 429 192.9 15.0a 8.8

7/18/1999 14:00:40 28.37 428 188.5 14.6 8.8

7/18/1999 14:30:40 28.49 428 186.9 14.5 8.8

7/18/1999 15:00:40 28.45 429 176.6 13.7 8.7

7/18/1999 15:30:40 28.21 431 162.4 12.7 8.7

7/18/1999 16:00:40 28.03 432 153.9 12.0 8.7

7/18/1999 16:30:40 27.74 436 137.1 10.8 8.6

7/18/1999 17:00:40 27.52 439 128.6 10.1 8.5

7/18/1999 17:30:40 27.40 439 128.2 10.1 8.5

7/18/1999 18:00:40 27.32 439 128.0 10.1 8.5

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 33

7/18/1999 18:30:40 27.27 440 129.6 10.3 8.5

7/18/1999 19:00:40 27.12 441 125.3 10.0 8.5

7/18/1999 19:30:40 26.95 442 117.1 9.3 8.4

7/18/1999 20:00:40 26.77 443 109.2 8.7 8.4

7/18/1999 20:30:40 26.60 445 100.1 8.0 8.3

7/18/1999 21:00:40 26.45 447 89.3 7.2 8.2

7/18/1999 21:30:40 26.29 448 79.9 6.4 8.2

7/18/1999 22:00:40 26.15 450 72.1 5.8 8.1

7/18/1999 22:30:40 26.00 451 64.7 5.2 8.0

7/18/1999 23:00:40 25.84 452 58.4 4.8 8.0

7/18/1999 23:30:40 25.66 453 52.6 4.3 7.9

7/19/1999 0:00:40 25.49 454 48.2 3.9 7.8

7/19/1999 0:30:40 25.34 455 45.4 3.7 7.8

7/19/1999 1:00:40 25.21 455 43.7 3.6 7.8

7/19/1999 1:30:40 25.10 455 42.9 3.5 7.8

7/19/1999 2:00:40 25.00 455 41.3 3.4 7.8

7/19/1999 2:30:40 24.91 455 40.5 3.4 7.8

7/19/1999 3:00:40 24.82 455 40.0 3.3 7.7

7/19/1999 3:30:40 24.74 455 38.8 3.2 7.7

7/19/1999 4:00:40 24.66 455 38.1 3.2 7.7

7/19/1999 4:30:40 24.59 455 37.1 3.1 7.7

7/19/1999 5:00:40 24.55 455 37.0 3.1 7.7

7/19/1999 5:30:40 24.49 455 36.2 3.0 7.7

7/19/1999 6:00:40 24.42 455 35.0 2.9 7.7

7/19/1999 6:30:40 24.37 455 35.9 3.0 7.7

7/19/1999 7:00:40 24.30 455 38.9 3.3 7.7

7/19/1999 7:30:40 24.35 454 46.2 3.9 7.8

7/19/1999 8:00:40 24.42 454 57.5 4.8 7.8

7/19/1999 8:30:40 24.56 453 70.4 5.9 7.9

7/19/1999 9:00:40 24.76 451 84.0 7.0 8.0

7/19/1999 9:30:40 25.02 450 99.6 8.2 8.1

7/19/1999 10:00:40 25.35 447 114.2 9.4 8.2

7/19/1999 10:30:40 25.71 445 128.2 10.4 8.3

7/19/1999 11:00:40 26.11 442 141.8 11.5 8.4

7/19/1999 11:30:40 26.52 440 153.3 12.3 8.5

7/19/1999 12:00:40 26.90 437 162.1 12.9 8.6

7/19/1999 12:30:40 27.30 435 169.7 13.4 8.6

7/19/1999 13:00:40 27.49 434 171.0 13.5 8.6

7/19/1999 13:30:40 27.77 433 176.0 13.8 8.7

7/19/1999 14:00:40 27.80 433 174.8 13.7 8.7

7/19/1999 14:30:40 27.77 432 172.8 13.6 8.7

7/19/1999 15:00:40 27.87 432 174.6 13.7 8.7

7/19/1999 15:30:40 27.72 429 166.8 13.1 8.7

7/19/1999 16:00:40 27.71 430 169.0 13.3 8.7

7/19/1999 16:30:40 27.63 433 160.6 12.6 8.7

7/19/1999 17:00:40 27.63 432 159.4 12.6 8.7

7/19/1999 17:30:40 27.70 429 163.0 12.8 8.7

7/19/1999 18:00:40 27.60 432 156.4 12.3 8.7

7/19/1999 18:30:40 27.55 435 153.1 12.1 8.7

7/19/1999 19:00:40 27.34 436 140.3 11.1 8.6

7/19/1999 19:30:40 27.15 438 128.6 10.2 8.5

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
34 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/19/1999 20:00:40 27.05 439 121.8 9.7 8.5

7/19/1999 20:30:40 26.91 441 109.2 8.7 8.4

7/19/1999 21:00:40 26.74 444 93.0 7.4 8.3

7/19/1999 21:30:40 26.58 447 83.8 6.7 8.2

7/19/1999 22:00:40 26.42 449 74.2 6.0 8.2

7/19/1999 22:30:40 26.26 451 64.6 5.2 8.1

7/19/1999 23:00:40 26.10 452 57.8 4.7 8.0

7/19/1999 23:30:40 25.93 453 51.2 4.2 7.9

7/20/1999 0:00:40 25.74 454 45.4 3.7 7.9

7/20/1999 0:30:40 25.56 455 40.2 3.3 7.8

7/20/1999 1:00:40 25.39 455 35.8 2.9 7.8

7/20/1999 1:30:40 25.23 456 33.0 2.7 7.7

7/20/1999 2:00:40 25.10 456 31.4 2.6 7.7

7/20/1999 2:30:40 24.97 457 31.5 2.6 7.7

7/20/1999 3:00:40 24.85 457 31.4 2.6 7.7

7/20/1999 3:30:40 24.74 457 30.2 2.5 7.7

7/20/1999 4:00:40 24.61 457 28.1 2.3 7.7

7/20/1999 4:30:40 24.53 457 28.1 2.3 7.7

7/20/1999 5:00:40 24.44 457 27.6 2.3 7.6

7/20/1999 5:30:40 24.37 457 26.6 2.2 7.6

7/20/1999 6:00:40 24.32 457 26.2 2.2b 7.6

7/20/1999 6:30:40 24.30 457 27.4 2.3 7.6

7/20/1999 7:00:40 24.29 457 29.3 2.5 7.6

7/20/1999 7:30:40 24.32 457 30.5 2.6 7.7

7/20/1999 8:00:40 24.34 457 33.5 2.8 7.7

7/20/1999 8:30:40 24.37 457 36.7 3.1 7.7

7/20/1999 9:00:40 24.46 457 48.2 4.0 7.7

7/20/1999 9:30:40 24.62 456 62.9 5.2 7.8

7/20/1999 10:00:40 24.87 454 84.0 7.0 7.9

7/20/1999 10:30:40 25.20 452 102.5 8.4 8.1

7/20/1999 11:00:40 25.37 449 112.1 9.2 8.2

7/20/1999 11:30:40 25.60 448 124.4 10.2 8.3

7/20/1999 12:00:40 25.98 444 145.8 11.8 8.4

Site 20

7/15/1999 12:30:40 25.23 – 172.6 14.2 8.7

7/15/1999 13:00:40 25.68 – 177.6 14.5 8.7

7/15/1999 13:30:40 26.11 – 181.8 14.7 8.8

7/15/1999 14:00:40 26.47 – 186.4 15.0 8.8

7/15/1999 14:30:40 26.54 – 184.2 14.8 8.8

7/15/1999 15:00:40 26.78 – 185.3 14.8 8.8

7/15/1999 15:30:40 26.86 – 184.1 14.7 8.8

7/15/1999 16:00:40 26.81 – 181 14.5 8.8

7/15/1999 16:30:40 26.71 – 176.2 14.1 8.8

7/15/1999 17:00:40 26.34 – 162.5 13.1 8.7

7/15/1999 17:30:40 26.11 – 155.3 12.6 8.7

7/15/1999 18:00:40 25.79 – 140.5 11.5 8.6

7/15/1999 18:30:40 25.65 – 137.5 11.2 8.6

7/15/1999 19:00:40 25.46 – 129.3 10.6 8.5

7/15/1999 19:30:40 25.29 – 123.3 10.1 8.5

7/15/1999 20:00:40 25 – 113.5 9.4 8.4

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 35

7/15/1999 20:30:40 24.68 – 101.4 8.4 8.3

7/15/1999 21:00:40 24.39 – 90.2 7.5 8.2

7/15/1999 21:30:40 24.14 – 82.8 7.0 8.1

7/15/1999 22:00:40 23.96 – 76.9 6.5 8.1

7/15/1999 22:30:40 23.82 – 72.3 6.1 8.0

7/15/1999 23:00:40 23.71 – 68.9 5.8 8.0

7/15/1999 23:30:40 23.62 – 66.1 5.6 8.0

7/16/1999 0:00:40 23.56 – 64.4 5.5 7.9

7/16/1999 0:30:40 23.49 – 63.2 5.4 7.9

7/16/1999 1:00:40 23.43 – 62.4 5.3 7.9

7/16/1999 1:30:40 23.37 – 61.5 5.2 7.9

7/16/1999 2:00:40 23.34 – 61 5.2 7.9

7/16/1999 2:30:40 23.29 – 60.3 5.1 7.9

7/16/1999 3:00:40 23.24 – 59.6 5.1 7.9

7/16/1999 3:30:40 23.21 – 58.9 5.0 7.9

7/16/1999 4:00:40 23.15 – 58.3 5.0 7.9

7/16/1999 4:30:40 23.09 – 57.2 4.9 7.9

7/16/1999 5:00:40 23.06 – 56.6 4.9 7.9

7/16/1999 5:30:40 23 – 55.5 4.8 7.9

7/16/1999 6:00:40 22.96 – 54.9 4.7 7.9

7/16/1999 6:30:40 22.91 – 55.2 4.7 7.9

7/16/1999 7:00:40 22.91 – 58.3 5.0 7.9

7/16/1999 7:30:40 22.95 – 64.9 5.6 7.9

7/16/1999 8:00:40 23.06 – 75 6.4 8.0

7/16/1999 8:30:40 23.24 – 86.9 7.4 8.1

7/16/1999 9:00:40 23.51 – 100.3 8.5 8.2

7/16/1999 9:30:40 23.83 – 114 9.6 8.3

7/16/1999 10:00:40 24.2 – 127.4 10.7 8.4

7/16/1999 10:30:40 24.63 – 140 11.6 8.5

7/16/1999 11:00:40 25.1 – 151.4 12.5 8.6

7/16/1999 11:30:40 25.54 – 160.5 13.1 8.6

7/16/1999 12:00:40 26 – 168.6 13.7 8.7

7/16/1999 12:30:40 26.38 – 173.6 14.0 8.7

7/16/1999 13:00:40 26.91 – 182 14.5 8.8

7/16/1999 13:30:40 27.11 – 181.6 14.4 8.8

7/16/1999 14:00:40 27.21 – 179 14.2 8.8

7/16/1999 14:30:40 27.53 – 182.9 14.4 8.8

7/16/1999 15:00:40 27.78 – 185.9 14.6 8.8

7/16/1999 15:30:40 27.84 – 185.3 14.5 8.8

7/16/1999 16:00:40 28.09 – 189 14.8 8.8

7/16/1999 16:30:40 27.87 – 179.9 14.1 8.8

7/16/1999 17:00:40 27.8 – 177.1 13.9 8.8

7/16/1999 17:30:40 27.63 – 170.3 13.4 8.8

7/16/1999 18:00:40 27.49 – 165.5 13.1 8.7

7/16/1999 18:30:40 27.24 – 155.9 12.4 8.7

7/16/1999 19:00:40 26.97 – 144.9 11.6 8.6

7/16/1999 19:30:40 26.7 – 132.5 10.6 8.6

7/16/1999 20:00:40 26.42 – 119.9 9.7 8.5

7/16/1999 20:30:40 26.07 – 104.8 8.5 8.4

7/16/1999 21:00:40 25.76 – 92.4 7.5 8.3

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
36 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/16/1999 21:30:40 25.5 – 82.4 6.7 8.2

7/16/1999 22:00:40 25.29 – 74.4 6.1 8.1

7/16/1999 22:30:40 25.13 – 68.6 5.7 8.0

7/16/1999 23:00:40 24.99 – 63.7 5.3 8.0

7/16/1999 23:30:40 24.86 – 59.9 5.0 7.9

7/17/1999 0:00:40 24.74 – 56.8 4.7 7.9

7/17/1999 0:30:40 24.62 – 55.2 4.6 7.9

7/17/1999 1:00:40 24.53 – 53.9 4.5 7.9

7/17/1999 1:30:40 24.43 – 52.9 4.4 7.9

7/17/1999 2:00:40 24.35 – 52.4 4.4 7.8

7/17/1999 2:30:40 24.27 – 52 4.4 7.8

7/17/1999 3:00:40 24.22 – 51.5 4.3 7.8

7/17/1999 3:30:40 24.13 – 50.9 4.3 7.8

7/17/1999 4:00:40 24.08 – 50.4 4.2 7.8

7/17/1999 4:30:40 24.01 – 49.5 4.2 7.8

7/17/1999 5:00:40 23.94 – 48.9 4.1 7.8

7/17/1999 5:30:40 23.86 – 48.6 4.1 7.8

7/17/1999 6:00:40 23.8 – 48 4.1 7.8

7/17/1999 6:30:40 23.73 – 48.6 4.1 7.8

7/17/1999 7:00:40 23.71 – 52.3 4.4 7.8

7/17/1999 7:30:40 23.76 – 59.8 5.1 7.9

7/17/1999 8:00:40 23.89 – 70.5 5.9 8.0

7/17/1999 8:30:40 24.09 – 82.9 7.0 8.1

7/17/1999 9:00:40 24.35 – 96.8 8.1 8.2

7/17/1999 9:30:40 24.71 – 111.7 9.3 8.3

7/17/1999 10:00:40 25.13 – 126.1 10.4 8.4

7/17/1999 10:30:40 25.6 – 140.6 11.5 8.5

7/17/1999 11:00:40 26.05 – 152.1 12.3 8.6

7/17/1999 11:30:40 26.47 – 160.9 12.9 8.6

7/17/1999 12:00:40 26.91 – 169.7 13.5 8.7

7/17/1999 12:30:40 27.32 – 175 13.9 8.7

7/17/1999 13:00:40 27.55 – 176 13.9 8.7

7/17/1999 13:30:40 28.09 – 185.2 14.5 8.8

7/17/1999 14:00:40 28.27 – 184.8 14.4 8.8

7/17/1999 14:30:40 28.78 – 193.3 14.9 8.9

7/17/1999 15:00:40 28.86 – 189.3 14.6 8.9

7/17/1999 15:30:40 29.06 – 192.6 14.8 8.9

7/17/1999 16:00:40 29.23 – 193.9 14.8 8.9

7/17/1999 16:30:40 29.38 – 193.9 14.8 8.9

7/17/1999 17:00:40 29.45 – 191.3 14.6 8.9

7/17/1999 17:30:40 29.29 – 183.1 14.0 8.9

7/17/1999 18:00:40 29.15 – 175.1 13.4 8.8

7/17/1999 18:30:40 28.72 – 160.2 12.4 8.8

7/17/1999 19:00:40 28.32 – 143.9 11.2 8.7

7/17/1999 19:30:40 27.94 – 126.3 9.9 8.6

7/17/1999 20:00:40 27.62 – 110.5 8.7 8.5

7/17/1999 20:30:40 27.3 – 96.3 7.6 8.4

7/17/1999 21:00:40 27 – 84.8 6.8 8.3

7/17/1999 21:30:40 26.71 – 76.5 6.1 8.2

7/17/1999 22:00:40 26.44 – 69 5.6 8.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 37

7/17/1999 22:30:40 26.19 – 62.5 5.1 8.0

7/17/1999 23:00:40 26 – 57.5 4.7 7.9

7/17/1999 23:30:40 25.84 – 53.8 4.4 7.9

7/18/1999 0:00:40 25.7 – 51.1 4.2 7.9

7/18/1999 0:30:40 25.58 – 49.4 4.0 7.8

7/18/1999 1:00:40 25.48 – 48.3 4.0 7.8

7/18/1999 1:30:40 25.38 – 47 3.9 7.8

7/18/1999 2:00:40 25.28 – 46.3 3.8 7.8

7/18/1999 2:30:40 25.18 – 45.5 3.7 7.8

7/18/1999 3:00:40 25.1 – 44.9 3.7 7.8

7/18/1999 3:30:40 25.02 – 44.4 3.7 7.8

7/18/1999 4:00:40 24.95 – 43.7 3.6 7.8

7/18/1999 4:30:40 24.87 – 42.9 3.6 7.8

7/18/1999 5:00:40 24.79 – 42.1 3.5 7.8

7/18/1999 5:30:40 24.72 – 41.5 3.4 7.8

7/18/1999 6:00:40 24.65 – 40.7 3.4 7.8

7/18/1999 6:30:40 24.58 – 41 3.4 7.8

7/18/1999 7:00:40 24.56 – 44.3 3.7 7.8

7/18/1999 7:30:40 24.59 – 51.4 4.3 7.8

7/18/1999 8:00:40 24.68 – 62.3 5.2 7.9

7/18/1999 8:30:40 24.83 – 75.3 6.2 8.0

7/18/1999 9:00:40 25.03 – 90 7.4 8.1

7/18/1999 9:30:40 25.31 – 106.2 8.7 8.2

7/18/1999 10:00:40 25.64 – 122 10.0 8.3

7/18/1999 10:30:40 26.02 – 137.3 11.1 8.4

7/18/1999 11:00:40 26.42 – 151.1 12.2 8.5

7/18/1999 11:30:40 26.88 – 164.6 13.1 8.6

7/18/1999 12:00:40 27.33 – 174 13.8 8.7

7/18/1999 12:30:40 27.81 – 184.1 14.5 8.8

7/18/1999 13:00:40 28.26 – 191.2 14.9 8.8

7/18/1999 13:30:40 28.73 – 198 15.3a 8.9

7/18/1999 14:00:40 28.7 – 188.5 14.6 8.8

7/18/1999 14:30:40 28.8 – 185.4 14.3 8.8

7/18/1999 15:00:40 28.8 – 181.9 14.0 8.8

7/18/1999 15:30:40 28.36 – 157.6 12.3 8.7

7/18/1999 16:00:40 28.17 – 150.5 11.7 8.7

7/18/1999 16:30:40 27.92 – 139.4 10.9 8.7

7/18/1999 17:00:40 27.67 – 131.7 10.4 8.6

7/18/1999 17:30:40 27.62 – 134.1 10.6 8.6

7/18/1999 18:00:40 27.55 – 132.6 10.5 8.6

7/18/1999 18:30:40 27.47 – 131.6 10.4 8.6

7/18/1999 19:00:40 27.4 – 130.9 10.4 8.6

7/18/1999 19:30:40 27.22 – 121.6 9.6 8.5

7/18/1999 20:00:40 26.98 – 111.5 8.9 8.4

7/18/1999 20:30:40 26.77 – 100.7 8.1 8.3

7/18/1999 21:00:40 26.55 – 89.3 7.2 8.3

7/18/1999 21:30:40 26.35 – 79.7 6.4 8.2

7/18/1999 22:00:40 26.16 – 71.2 5.8 8.1

7/18/1999 22:30:40 25.99 – 64.4 5.2 8.0

7/18/1999 23:00:40 25.82 – 59.6 4.9 8.0

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
38 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/18/1999 23:30:40 25.64 – 54.9 4.5 7.9

7/19/1999 0:00:40 25.47 – 51 4.2 7.9

7/19/1999 0:30:40 25.29 – 48 3.9 7.8

7/19/1999 1:00:40 25.15 – 46.3 3.8 7.8

7/19/1999 1:30:40 25.02 – 45.3 3.7 7.8

7/19/1999 2:00:40 24.91 – 44.6 3.7 7.8

7/19/1999 2:30:40 24.83 – 44.4 3.7 7.8

7/19/1999 3:00:40 24.75 – 43.9 3.6 7.8

7/19/1999 3:30:40 24.66 – 43.3 3.6 7.7

7/19/1999 4:00:40 24.6 – 43 3.6 7.7

7/19/1999 4:30:40 24.53 – 42.5 3.5 7.7

7/19/1999 5:00:40 24.47 – 42.1 3.5 7.7

7/19/1999 5:30:40 24.4 – 41.5 3.5 7.7

7/19/1999 6:00:40 24.33 – 41 3.4 7.7

7/19/1999 6:30:40 24.27 – 41.7 3.5 7.7

7/19/1999 7:00:40 24.25 – 45.6 3.8 7.8

7/19/1999 7:30:40 24.27 – 52.5 4.4 7.8

7/19/1999 8:00:40 24.36 – 63.4 5.3 7.9

7/19/1999 8:30:40 24.52 – 76.7 6.4 8.0

7/19/1999 9:00:40 24.76 – 91.6 7.6 8.1

7/19/1999 9:30:40 25.08 – 107.3 8.9 8.2

7/19/1999 10:00:40 25.47 – 123.4 10.1 8.3

7/19/1999 10:30:40 25.9 – 138.5 11.2 8.4

7/19/1999 11:00:40 26.35 – 152 12.3 8.5

7/19/1999 11:30:40 26.83 – 164.4 13.1 8.6

7/19/1999 12:00:40 27.13 – 169.2 13.4 8.7

7/19/1999 12:30:40 27.54 – 175.8 13.9 8.7

7/19/1999 13:00:40 27.77 – 175.6 13.8 8.7

7/19/1999 13:30:40 28.06 – 180.3 14.1 8.8

7/19/1999 14:00:40 28.17 – 179.8 14.0 8.8

7/19/1999 14:30:40 28.14 – 177.7 13.9 8.8

7/19/1999 15:00:40 28.24 – 180.6 14.1 8.8

7/19/1999 15:30:40 27.97 – 168.9 13.2 8.8

7/19/1999 16:00:40 27.97 – 169.8 13.3 8.8

7/19/1999 16:30:40 28.02 – 169.6 13.3 8.8

7/19/1999 17:00:40 28 – 167.1 13.1 8.8

7/19/1999 17:30:40 28.04 – 167.8 13.1 8.8

7/19/1999 18:00:40 27.83 – 156.5 12.3 8.7

7/19/1999 18:30:40 27.83 – 157 12.3 8.7

7/19/1999 19:00:40 27.66 – 149.2 11.7 8.7

7/19/1999 19:30:40 27.39 – 132.6 10.5 8.6

7/19/1999 20:00:40 27.21 – 122 9.7 8.6

7/19/1999 20:30:40 27.05 – 112.5 9.0 8.5

7/19/1999 21:00:40 26.85 – 98.6 7.9 8.4

7/19/1999 21:30:40 26.65 – 86.3 6.9 8.3

7/19/1999 22:00:40 26.46 – 76.1 6.1 8.2

7/19/1999 22:30:40 26.27 – 67.4 5.4 8.1

7/19/1999 23:00:40 26.09 – 60.5 4.9 8.0

7/19/1999 23:30:40 25.92 – 55.1 4.5 7.9

7/20/1999 0:00:40 25.74 – 50.3 4.1 7.9

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 39

7/20/1999 0:30:40 25.57 – 46 3.8 7.8

7/20/1999 1:00:40 25.39 – 42.8 3.5 7.8

7/20/1999 1:30:40 25.22 – 40.4 3.3 7.8

7/20/1999 2:00:40 25.07 – 38.9 3.2 7.7

7/20/1999 2:30:40 24.93 – 37.9 3.1 7.7

7/20/1999 3:00:40 24.79 – 37.8 3.1 7.7

7/20/1999 3:30:40 24.69 – 37.2 3.1 7.7

7/20/1999 4:00:40 24.58 – 37.4 3.1 7.7

7/20/1999 4:30:40 24.49 – 37.3 3.1 7.7

7/20/1999 5:00:40 24.41 – 37.3 3.1 7.7

7/20/1999 5:30:40 24.34 – 36.8 3.1 7.7

7/20/1999 6:00:40 24.29 – 36.8 3.1b 7.7

7/20/1999 6:30:40 24.28 – 36.9 3.1 7.7

7/20/1999 7:00:40 24.27 – 38.3 3.2 7.7

7/20/1999 7:30:40 24.26 – 38.4 3.2 7.7

7/20/1999 8:00:40 24.28 – 40 3.4 7.7

7/20/1999 8:30:40 24.3 – 44.4 3.7 7.7

7/20/1999 9:00:40 24.43 – 58.3 4.9 7.8

7/20/1999 9:30:40 24.61 – 71.3 5.9 7.9

7/20/1999 10:00:40 24.89 – 91.3 7.6 8.0

7/20/1999 10:30:40 25.31 – 112.9 9.3 8.2

7/20/1999 11:00:40 25.48 – 119.1 9.7 8.3

7/20/1999 11:30:40 25.74 – 131.2 10.7 8.4

Site 22

7/28/1999 14:30:40 25.69 453 62.2 5.1 7.8

7/28/1999 15:00:40 25.64 453 53.9 4.4 7.8

7/28/1999 15:30:40 26.14 453 62.7 5.1 7.9

7/28/1999 16:00:40 26.39 455 78.4 6.3 8.0

7/28/1999 16:30:40 26.43 455 79.6 6.4 8.0

7/28/1999 17:00:40 25.71 454 53.7 4.4 7.8

7/28/1999 17:30:40 25.72 423 79.7 6.5a 8.0

7/28/1999 18:00:40 25.41 409 75.5 6.2 7.9

7/28/1999 18:30:40 25.49 416 71.7 5.9 7.9

7/28/1999 19:00:40 25.6 426 67 5.5 7.9

7/28/1999 19:30:40 25.67 434 67.5 5.5 7.9

7/28/1999 20:00:40 25.42 430 48.7 4.0 7.8

7/28/1999 20:30:40 25.32 428 41 3.4 7.7

7/28/1999 21:00:40 25.29 430 44.2 3.6 7.7

7/28/1999 21:30:40 25.29 432 46.8 3.8 7.7

7/28/1999 22:00:40 25.24 427 44.4 3.7 7.7

7/28/1999 22:30:40 25.16 427 44.6 3.7 7.7

7/28/1999 23:00:40 25.12 431 43.6 3.6 7.7

7/28/1999 23:30:40 25.08 436 43.3 3.6 7.7

7/29/1999 0:00:40 25.03 440 39.2 3.2 7.7

7/29/1999 0:30:40 24.98 441 41.5 3.4 7.7

7/29/1999 1:00:40 24.92 443 42.6 3.5 7.7

7/29/1999 1:30:40 24.84 444 44.2 3.7 7.7

7/29/1999 2:00:40 24.73 444 44 3.7 7.7

7/29/1999 2:30:40 24.65 444 41.4 3.4 7.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
40 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/29/1999 3:00:40 24.58 444 42.3 3.5 7.7

7/29/1999 3:30:40 24.5 445 41.4 3.5 7.7

7/29/1999 4:00:40 24.44 444 40.4 3.4 7.7

7/29/1999 4:30:40 24.37 445 40.6 3.4 7.7

7/29/1999 5:00:40 24.31 445 38.1 3.2 7.7

7/29/1999 5:30:40 24.26 446 39.4 3.3 7.7

7/29/1999 6:00:40 24.23 445 38.9 3.3 7.7

7/29/1999 6:30:40 24.18 446 36.6 3.1 7.7

7/29/1999 7:00:40 24.16 445 37.1 3.1 7.7

7/29/1999 7:30:40 24.15 445 35.7 3.0 7.7

7/29/1999 8:00:40 24.14 445 36 3.0 7.7

7/29/1999 8:30:40 24.14 445 37.6 3.2 7.6

7/29/1999 9:00:40 24.15 445 37.2 3.1 7.6

7/29/1999 9:30:40 24.16 446 29.6 2.5b 7.6

7/29/1999 10:00:40 24.22 445 36.4 3.1 7.6

7/29/1999 10:30:40 24.23 445 33.9 2.8 7.6

7/29/1999 11:00:40 24.27 445 35.2 2.9 7.6

7/29/1999 11:30:40 24.33 445 38.6 3.2 7.7

7/29/1999 12:00:40 24.37 444 36.9 3.1 7.7

7/29/1999 12:30:40 24.44 443 37.7 3.2 7.6

7/29/1999 13:00:40 24.53 443 40.4 3.4 7.7

7/29/1999 13:30:40 24.55 442 40.3 3.4 7.7

7/29/1999 14:00:40 24.62 441 46.9 3.9 7.7

7/29/1999 14:30:40 24.6 440 46.6 3.9 7.7

7/29/1999 15:00:40 24.74 440 43.6 3.6 7.7

7/29/1999 15:30:40 24.69 439 50 4.2 7.7

7/29/1999 16:00:40 24.8 439 51.1 4.2 7.7

7/29/1999 16:30:40 24.79 438 53.3 4.4 7.7

7/29/1999 17:00:40 24.82 439 56.2 4.7 7.7

7/29/1999 17:30:40 24.84 438 55.4 4.6 7.7

7/29/1999 18:00:40 24.88 438 55.4 4.6 7.7

7/29/1999 18:30:40 24.9 439 52 4.3 7.7

7/29/1999 19:00:40 26.07 442 56 4.5 8.0

7/29/1999 19:30:40 26.24 444 66.1 5.3 8.0

7/29/1999 20:00:40 26.17 444 62.2 5.0 8.0

7/29/1999 20:30:40 26.22 444 64.9 5.2 7.9

7/29/1999 21:00:40 26.15 444 59 4.8 7.9

7/29/1999 21:30:40 26.08 444 58.2 4.7 7.9

7/29/1999 22:00:40 26 444 56.9 4.6 7.8

7/29/1999 22:30:40 25.92 445 51.7 4.2 7.8

7/29/1999 23:00:40 25.8 445 47.7 3.9 7.8

7/29/1999 23:30:40 25.72 445 52.1 4.2 7.8

7/30/1999 0:00:40 25.63 445 50.9 4.2 7.8

7/30/1999 0:30:40 25.53 445 52.4 4.3 7.8

7/30/1999 1:00:40 25.43 446 51.1 4.2 7.8

7/30/1999 1:30:40 25.35 446 51.3 4.2 7.8

7/30/1999 2:00:40 25.26 445 64.4 5.3 7.8

7/30/1999 2:30:40 25.17 445 61.9 5.1 7.7

7/30/1999 3:00:40 25.09 445 63.9 5.3 7.7

7/30/1999 3:30:40 25.02 445 67.6 5.6 7.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 41

7/30/1999 4:00:40 24.95 445 66.2 5.5 7.7

7/30/1999 4:30:40 24.9 445 64.7 5.4 7.7

7/30/1999 5:00:40 24.84 445 65.5 5.4 7.7

7/30/1999 5:30:40 24.79 445 49.1 4.1 7.7

7/30/1999 6:00:40 24.74 445 70.8 5.9 7.7

7/30/1999 6:30:40 24.69 445 65.9 5.5 7.7

7/30/1999 7:00:40 24.66 445 66.9 5.6 7.7

7/30/1999 7:30:40 24.65 444 68.1 5.7 7.7

7/30/1999 8:00:40 24.64 445 69.9 5.8 7.7

7/30/1999 8:30:40 24.67 444 69.3 5.8 7.7

7/30/1999 9:00:40 23.82 3 93.7 7.9 8.0

Site 23

7/28/1999 13:00:40 25.84 447 108.2 8.8 8.2

7/28/1999 13:30:40 25.96 445 115.3 9.4 8.3

7/28/1999 14:00:40 26.15 444 121.1 9.8 8.3

7/28/1999 14:30:40 26.36 443 126.3 10.2 8.4

7/28/1999 15:00:40 26.48 442 127.8 10.3a 8.4

7/28/1999 15:30:40 26.53 442 126.8 10.2 8.4

7/28/1999 16:00:40 26.6 442 126 10.1 8.4

7/28/1999 16:30:40 26.64 441 124.9 10.0 8.4

7/28/1999 17:00:40 26.35 431 118.6 9.6 8.4

7/28/1999 17:30:40 25.74 387 108.5 8.8 8.4

7/28/1999 18:00:40 25.91 409 105.3 8.6 8.4

7/28/1999 18:30:40 25.81 411 98.1 8.0 8.4

7/28/1999 19:00:40 25.66 409 92 7.5 8.3

7/28/1999 19:30:40 25.53 415 87.2 7.1 8.2

7/28/1999 20:00:40 25.38 420 83.5 6.8 8.2

7/28/1999 20:30:40 25.21 425 80.2 6.6 8.1

7/28/1999 21:00:40 25.02 430 76.5 6.3 8.1

7/28/1999 21:30:40 24.84 435 73.3 6.1 8.0

7/28/1999 22:00:40 24.71 438 71.1 5.9 8.0

7/28/1999 22:30:40 24.61 440 69.5 5.8 8.0

7/28/1999 23:00:40 24.54 440 67.7 5.6 8.0

7/28/1999 23:30:40 24.44 437 66.2 5.5 8.0

7/29/1999 0:00:40 24.37 435 64.5 5.4 8.0

7/29/1999 0:30:40 24.3 432 63 5.3 8.0

7/29/1999 1:00:40 24.23 429 61.5 5.2 7.9

7/29/1999 1:30:40 24.17 426 59.9 5.0 7.9

7/29/1999 2:00:40 24.09 424 58.9 4.9 7.9

7/29/1999 2:30:40 24.03 422 57.6 4.9 7.9

7/29/1999 3:00:40 23.96 422 57.2 4.8 7.9

7/29/1999 3:30:40 23.9 422 56.3 4.8 7.9

7/29/1999 4:00:40 23.84 422 55.6 4.7 7.9

7/29/1999 4:30:40 23.78 424 55.2 4.7 7.9

7/29/1999 5:00:40 23.73 425 54.5 4.6 7.9

7/29/1999 5:30:40 23.69 427 53.7 4.5 7.9

7/29/1999 6:00:40 23.64 429 53.2 4.5 7.9

7/29/1999 6:30:40 23.59 431 52.8 4.5 7.9

7/29/1999 7:00:40 23.57 433 51.8 4.4 7.8

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
42 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/29/1999 7:30:40 23.51 433 52.6 4.5 7.8

7/29/1999 8:00:40 23.52 435 52.9 4.5 7.8

7/29/1999 8:30:40 23.56 437 53.5 4.5 7.8

7/29/1999 9:00:40 23.68 438 56.9 4.8 7.9

7/29/1999 9:30:40 23.8 439 58.4 4.9 7.9

7/29/1999 10:00:40 24.02 439 63.9 5.4 7.9

7/29/1999 10:30:40 24.19 440 70 5.9 7.9

7/29/1999 11:00:40 24.39 439 76.4 6.4 8.0

7/29/1999 11:30:40 24.58 439 83.8 7.0 8.0

7/29/1999 12:00:40 24.79 438 91.3 7.6 8.1

7/29/1999 12:30:40 25.03 437 100.5 8.3 8.2

7/29/1999 13:00:40 25.28 436 109.1 9.0 8.2

7/29/1999 13:30:40 25.51 435 114.9 9.4 8.3

7/29/1999 14:00:40 25.82 434 120.8 9.8 8.3

7/29/1999 14:30:40 26.03 434 122.1 9.9 8.3

7/29/1999 15:00:40 26.26 433 124.3 10.0 8.4

7/29/1999 15:30:40 26.4 433 125 10.1 8.4

7/29/1999 16:00:40 26.48 433 124.3 10.0 8.4

7/29/1999 16:30:40 26.51 433 122.3 9.8 8.4

7/29/1999 17:00:40 26.46 434 118.9 9.6 8.4

7/29/1999 17:30:40 26.4 434 114.4 9.2 8.3

7/29/1999 18:00:40 26.31 435 109.8 8.9 8.3

7/29/1999 18:30:40 26.23 436 105.8 8.5 8.3

7/29/1999 19:00:40 26.15 437 102.8 8.3 8.2

7/29/1999 19:30:40 26.06 437 100.2 8.1 8.2

7/29/1999 20:00:40 25.95 437 97.2 7.9 8.2

7/29/1999 20:30:40 25.83 437 94.3 7.7 8.2

7/29/1999 21:00:40 25.69 437 90.9 7.4 8.2

7/29/1999 21:30:40 25.53 437 87.1 7.1 8.1

7/29/1999 22:00:40 25.36 436 83 6.8 8.1

7/29/1999 22:30:40 25.18 436 78.4 6.5 8.0

7/29/1999 23:00:40 24.99 436 74 6.1 8.0

7/29/1999 23:30:40 24.82 436 70.1 5.8 8.0

7/30/1999 0:00:40 24.66 435 66.1 5.5 7.9

7/30/1999 0:30:40 24.5 435 62.8 5.2 7.9

7/30/1999 1:00:40 24.4 435 59.9 5.0 7.9

7/30/1999 1:30:40 24.3 434 58.1 4.9 7.9

7/30/1999 2:00:40 24.23 434 56.5 4.7 7.9

7/30/1999 2:30:40 24.18 434 55.3 4.6 7.8

7/30/1999 3:00:40 24.14 433 54.1 4.5 7.8

7/30/1999 3:30:40 24.1 433 53.6 4.5 7.8

7/30/1999 4:00:40 24.06 433 52.7 4.4 7.8

7/30/1999 4:30:40 24.02 432 52.5 4.4 7.8

7/30/1999 5:00:40 23.99 432 51.9 4.4 7.8

7/30/1999 5:30:40 23.95 433 51.6 4.3 7.8

7/30/1999 6:00:40 23.91 432 51.3 4.3 7.8

7/30/1999 6:30:40 23.88 432 50.5 4.3b 7.8

7/30/1999 7:00:40 23.87 432 50.5 4.3 7.8

7/30/1999 7:30:40 23.87 432 51 4.3 7.8

7/30/1999 8:00:40 23.84 431 51.1 4.3 7.8

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 43

Site 27

7/26/1999 16:30:40 26.77 366 188.2 15.0 8.6

7/26/1999 17:00:40 26.89 362 189.4 15.1 8.6

7/26/1999 17:30:40 26.86 358 190.1 15.2 8.6

7/26/1999 18:00:40 26.78 354 196.1 15.7 8.6

7/26/1999 18:30:40 26.59 352 190.3 15.3 8.6

7/26/1999 19:00:40 26.39 352 183.1 14.7 8.5

7/26/1999 19:30:40 26.15 351 173.2 14.0 8.5

7/26/1999 20:00:40 25.87 351 161.1 13.1 8.4

7/26/1999 20:30:40 25.6 354 148.7 12.1 8.4

7/26/1999 21:00:40 25.37 357 138.3 11.3 8.3

7/26/1999 21:30:40 25.13 359 128 10.6 8.3

7/26/1999 22:00:40 24.92 363 120.8 10.0 8.2

7/26/1999 22:30:40 24.74 366 114.9 9.5 8.2

7/26/1999 23:00:40 24.55 368 110.1 9.2 8.1

7/26/1999 23:30:40 24.39 370 105.8 8.8 8.1

7/27/1999 0:00:40 24.23 373 102.1 8.6 8.1

7/27/1999 0:30:40 24.05 376 99 8.3 8.0

7/27/1999 1:00:40 23.89 379 95.3 8.0 8.0

7/27/1999 1:30:40 23.74 382 91.6 7.7 8.0

7/27/1999 2:00:40 23.59 385 88.2 7.5 7.9

7/27/1999 2:30:40 23.45 387 84.2 7.2 7.9

7/27/1999 3:00:40 23.31 390 80.3 6.8 7.9

7/27/1999 3:30:40 23.18 392 76.7 6.6 7.8

7/27/1999 4:00:40 23.05 393 73.6 6.3 7.8

7/27/1999 4:30:40 22.94 394 70.5 6.1 7.8

7/27/1999 5:00:40 22.84 394 67.4 5.8 7.7

7/27/1999 5:30:40 22.76 394 64.9 5.6 7.7

7/27/1999 6:00:40 22.71 394 62.3 5.4 7.7

7/27/1999 6:30:40 22.68 393 59.9 5.2 7.7

7/27/1999 7:00:40 22.66 392 58.4 5.0 7.7

7/27/1999 7:30:40 22.66 391 58.2 5.0 7.7

7/27/1999 8:00:40 22.68 390 57.7 5.0b 7.7

7/27/1999 8:30:40 22.73 389 60.2 5.2 7.7

7/27/1999 9:00:40 22.8 388 65.3 5.6 7.7

7/27/1999 9:30:40 22.9 386 71.9 6.2 7.7

7/27/1999 10:00:40 23.04 385 79.1 6.8 7.8

7/27/1999 10:30:40 23.2 382 88.1 7.5 7.8

7/27/1999 11:00:40 23.42 383 97.3 8.3 7.9

7/27/1999 11:30:40 23.61 380 105.9 9.0 8.0

7/27/1999 12:00:40 23.99 380 116.9 9.8 8.0

7/27/1999 12:30:40 24.44 377 129 10.8 8.1

7/27/1999 13:00:40 24.95 377 140.8 11.6 8.2

7/27/1999 13:30:40 25.28 378 149 12.2 8.3

7/27/1999 14:00:40 25.59 376 156.7 12.8 8.3

7/27/1999 14:30:40 25.95 373 166.2 13.5 8.4

7/27/1999 15:00:40 26.2 373 176.4 14.3 8.4

7/27/1999 15:30:40 26.31 372 181.4 14.6 8.5

7/27/1999 16:00:40 26.47 368 186.5 15.0 8.5

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
44 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/27/1999 16:30:40 26.61 370 191 15.3 8.5

7/27/1999 17:00:40 26.71 368 195.3 15.6 8.5

7/27/1999 17:30:40 26.83 366 198.5 15.9a 8.6

7/27/1999 18:00:40 26.68 366 192.3 15.4 8.5

7/27/1999 18:30:40 26.59 366 186 14.9 8.5

7/27/1999 19:00:40 26.42 367 179.6 14.5 8.5

7/27/1999 19:30:40 26.23 367 172.6 13.9 8.5

7/27/1999 20:00:40 26.03 368 163.5 13.2 8.4

7/27/1999 20:30:40 25.83 370 152.5 12.4 8.4

7/27/1999 21:00:40 25.62 373 140.9 11.5 8.3

7/27/1999 21:30:40 25.4 375 130.1 10.7 8.2

7/27/1999 22:00:40 25.21 377 122.3 10.1 8.2

7/27/1999 22:30:40 25.03 380 115.7 9.6 8.1

7/27/1999 23:00:40 24.87 381 111.3 9.2 8.1

7/27/1999 23:30:40 24.71 383 106.9 8.9 8.1

7/28/1999 0:00:40 24.56 384 103 8.6 8.0

7/28/1999 0:30:40 24.42 386 99.1 8.3 8.0

7/28/1999 1:00:40 24.28 387 95.4 8.0 8.0

7/28/1999 1:30:40 24.12 389 92.3 7.7 7.9

7/28/1999 2:00:40 23.99 390 88.2 7.4 7.9

7/28/1999 2:30:40 23.85 391 84.4 7.1 7.9

7/28/1999 3:00:40 23.7 393 81 6.9 7.8

7/28/1999 3:30:40 23.59 394 74.9 6.3 7.8

7/28/1999 4:00:40 23.46 394 73.7 6.3 7.8

7/28/1999 4:30:40 23.34 395 70.7 6.0 7.7

7/28/1999 5:00:40 23.24 395 67.7 5.8 7.7

7/28/1999 5:30:40 23.15 395 64.9 5.5 7.7

7/28/1999 6:00:40 23.07 394 62.1 5.3 7.7

7/28/1999 6:30:40 23.01 394 59.8 5.1 7.7

7/28/1999 7:00:40 22.97 393 58.8 5.0 7.6

7/28/1999 7:30:40 22.97 392 61.1 5.2 7.7

Site 28

7/26/1999 16:00:40 25.84 405 171.6 14.0 8.6

7/26/1999 16:30:40 25.97 403 167.9 13.6 8.6

7/26/1999 17:00:40 26 400 165.9 13.4 8.7

7/26/1999 17:30:40 25.96 396 163.3 13.2 8.6

7/26/1999 18:00:40 25.83 392 159.2 13.0 8.6

7/26/1999 18:30:40 25.69 389 156.1 12.7 8.6

7/26/1999 19:00:40 25.53 386 151.7 12.4 8.6

7/26/1999 19:30:40 25.42 384 145.2 11.9 8.5

7/26/1999 20:00:40 25.31 382 138.3 11.4 8.5

7/26/1999 20:30:40 25.14 382 129.4 10.7 8.4

7/26/1999 21:00:40 24.95 383 120.1 9.9 8.3

7/26/1999 21:30:40 24.75 386 111.4 9.2 8.3

7/26/1999 22:00:40 24.53 389 104.2 8.7 8.2

7/26/1999 22:30:40 24.35 392 97.8 8.2 8.2

7/26/1999 23:00:40 24.15 396 92.4 7.8 8.1

7/26/1999 23:30:40 23.98 400 87.8 7.4 8.1

7/27/1999 0:00:40 23.81 404 84 7.1 8.0

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 45

7/27/1999 0:30:40 23.65 407 80.7 6.8 8.0

7/27/1999 1:00:40 23.51 410 78 6.6 8.0

7/27/1999 1:30:40 23.4 411 75.5 6.4 8.0

7/27/1999 2:00:40 23.26 414 73.5 6.3 7.9

7/27/1999 2:30:40 23.14 415 71.3 6.1 7.9

7/27/1999 3:00:40 23.01 417 69.1 5.9 7.9

7/27/1999 3:30:40 22.88 418 67 5.8 7.9

7/27/1999 4:00:40 22.77 418 64.7 5.6 7.9

7/27/1999 4:30:40 22.65 419 62.6 5.4 7.8

7/27/1999 5:00:40 22.54 419 60.4 5.2 7.8

7/27/1999 5:30:40 22.44 420 58.7 5.1 7.8

7/27/1999 6:00:40 22.37 420 56.9 4.9 7.8

7/27/1999 6:30:40 22.3 419 55.4 4.8 7.8

7/27/1999 7:00:40 22.25 419 54.4 4.7 7.8

7/27/1999 7:30:40 22.2 419 53.9 4.7b 7.8

7/27/1999 8:00:40 22.18 418 54.2 4.7 7.7

7/27/1999 8:30:40 22.19 418 58 5.1 7.8

7/27/1999 9:00:40 22.23 403 63.8 5.6 7.8

7/27/1999 9:30:40 22.31 421 70.3 6.1 7.9

7/27/1999 10:00:40 22.46 410 79 6.8 7.9

7/27/1999 10:30:40 22.61 405 88.6 7.7 8.0

7/27/1999 11:00:40 22.86 407 99.2 8.5 8.1

7/27/1999 11:30:40 23.08 411 109.9 9.4 8.2

7/27/1999 12:00:40 23.45 411 121.8 10.4 8.3

7/27/1999 12:30:40 23.93 406 133.9 11.3 8.4

7/27/1999 13:00:40 24.4 407 145.4 12.1 8.5

7/27/1999 13:30:40 24.78 402 153.9 12.8 8.6

7/27/1999 14:00:40 25.04 404 160.1 13.2 8.6

7/27/1999 14:30:40 25.51 402 167.1 13.7 8.7

7/27/1999 15:00:40 25.88 400 174 14.1 8.7

7/27/1999 15:30:40 25.98 398 176.3 14.3 8.7

7/27/1999 16:00:40 26.05 397 174.5 14.1 8.7

7/27/1999 16:30:40 26.15 395 175.6 14.2 8.7

7/27/1999 17:00:40 26.29 393 175.6 14.2 8.7

7/27/1999 17:30:40 26.29 391 178.6 14.4a 8.7

7/27/1999 18:00:40 26.19 390 173.2 14.0 8.6

7/27/1999 18:30:40 26.06 390 166.5 13.5 8.6

7/27/1999 19:00:40 25.92 389 159.1 12.9 8.6

7/27/1999 19:30:40 25.77 396 153.1 12.5 8.5

7/27/1999 20:00:40 25.61 397 145.7 11.9 8.5

7/27/1999 20:30:40 25.43 398 136.6 11.2 8.4

7/27/1999 21:00:40 25.25 399 124.5 10.2 8.3

7/27/1999 21:30:40 25.05 400 115.2 9.5 8.3

7/27/1999 22:00:40 24.86 402 106.9 8.8 8.2

7/27/1999 22:30:40 24.66 404 100 8.3 8.1

7/27/1999 23:00:40 24.47 406 94.2 7.9 8.1

7/27/1999 23:30:40 24.3 407 89.3 7.5 8.0

7/28/1999 0:00:40 24.15 408 85.2 7.2 8.0

7/28/1999 0:30:40 24.01 410 82 6.9 8.0

7/28/1999 1:00:40 23.89 411 78.9 6.7 8.0

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
46 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/28/1999 1:30:40 23.76 412 76.2 6.4 7.9

7/28/1999 2:00:40 23.65 413 73.9 6.3 7.9

7/28/1999 2:30:40 23.53 415 71.6 6.1 7.9

7/28/1999 3:00:40 23.41 416 69.3 5.9 7.9

7/28/1999 3:30:40 23.29 416 67.1 5.7 7.8

7/28/1999 4:00:40 23.17 418 64.9 5.6 7.8

7/28/1999 4:30:40 23.06 419 62.7 5.4 7.8

7/28/1999 5:00:40 22.96 419 60.4 5.2 7.8

7/28/1999 5:30:40 22.85 419 58.3 5.0 7.8

7/28/1999 6:00:40 22.74 420 56.6 4.9 7.8

7/28/1999 6:30:40 22.65 420 55.1 4.8 7.8

7/28/1999 7:00:40 22.57 420 55.1 4.8 7.7

7/28/1999 7:30:40 22.54 420 57.1 4.9 7.8

Site 29

7/26/1999 15:00:40 24.48 446 85.6 7.1 8.0

7/26/1999 15:30:40 24.73 447 88.6 7.4 8.0

7/26/1999 16:00:40 24.27 452 74.7 6.3 7.9

7/26/1999 16:30:40 24.52 449 92.4 7.7 8.0

7/26/1999 17:00:40 24.63 449 101.9 8.5 8.0

7/26/1999 17:30:40 23.77 445 88.1 7.4 8.0

7/26/1999 18:00:40 23.92 444 90.4 7.6 8.0

7/26/1999 18:30:40 23.79 443 105.1 8.9 8.2

7/26/1999 19:00:40 23.96 442 124 10.4 8.3

7/26/1999 19:30:40 24.06 441 131.6 11.1 8.4

7/26/1999 20:00:40 24.15 439 140.2 11.8 8.4

7/26/1999 20:30:40 24.25 438 144.3 12.1 8.5

7/26/1999 21:00:40 24.26 439 150.1 12.6 8.5

7/26/1999 21:30:40 24.57 431 151.9 12.6 8.5

7/26/1999 22:00:40 24.73 431 151.2 12.5 8.5

7/26/1999 22:30:40 24.84 431 146.6 12.1 8.5

7/26/1999 23:00:40 24.58 436 146.3 12.2 8.5

7/26/1999 23:30:40 24.61 438 144.6 12.0 8.5

7/27/1999 0:00:40 24.67 437 145.3 12.1 8.5

7/27/1999 0:30:40 24.65 437 143.7 11.9 8.5

7/27/1999 1:00:40 24.66 437 139.5 11.6 8.5

7/27/1999 1:30:40 24.63 438 137 11.4 8.5

7/27/1999 2:00:40 24.65 438 131.9 11.0 8.4

7/27/1999 2:30:40 24.63 437 129.4 10.8 8.4

7/27/1999 3:00:40 24.59 437 129.2 10.7 8.4

7/27/1999 3:30:40 24.48 438 125.3 10.5 8.4

7/27/1999 4:00:40 24.39 439 116.5 9.7 8.4

7/27/1999 4:30:40 24.27 439 111.7 9.4 8.3

7/27/1999 5:00:40 24.09 440 101.1 8.5 8.2

7/27/1999 5:30:40 23.97 439 92.4 7.8 8.2

7/27/1999 6:00:40 23.87 439 90.3 7.6 8.1

7/27/1999 6:30:40 23.8 441 87.4 7.4 8.1

7/27/1999 7:00:40 23.62 442 80.1 6.8 8.0

7/27/1999 7:30:40 23.52 444 74.9 6.4 8.0

7/27/1999 8:00:40 24.08 440 107 9.0 8.3

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 47

7/27/1999 8:30:40 24.01 441 105.6 8.9 8.2

7/27/1999 9:00:40 23.64 445 83.8 7.1 8.1

7/27/1999 9:30:40 23.69 445 84 7.1 8.0

7/27/1999 10:00:40 23.87 443 90.5 7.6 8.1

7/27/1999 10:30:40 23.69 444 85.4 7.2 8.1

7/27/1999 11:00:40 23.92 443 93.4 7.9 8.1

7/27/1999 11:30:40 23.71 446 86.2 7.3 8.0

7/27/1999 12:00:40 23.51 447 75.8 6.4 8.0

7/27/1999 12:30:40 23.43 447 74 6.3 7.9

7/27/1999 13:00:40 24.03 446 88.1 7.4 8.0

7/27/1999 13:30:40 23.95 446 82.6 7.0 8.0

7/27/1999 14:00:40 23.96 447 80.3 6.8 8.0

7/27/1999 14:30:40 23.85 448 81.2 6.9 8.0

7/27/1999 15:00:40 23.59 449 75.1 6.4 7.9

7/27/1999 15:30:40 23.99 449 78.3 6.6 7.9

7/27/1999 16:00:40 23.7 450 74.2 6.3 7.9

7/27/1999 16:30:40 23.53 450 85.7 7.3 7.9

7/27/1999 17:00:40 23.93 449 68.1 5.7b 7.9

7/27/1999 17:30:40 23.55 448 69.1 5.9 7.9

7/27/1999 18:00:40 23.54 441 89.8 7.6 8.0

7/27/1999 18:30:40 23.62 441 89.2 7.6 8.1

7/27/1999 19:00:40 23.7 440 106.1 9.0 8.2

7/27/1999 19:30:40 24.02 441 102.7 8.6 8.2

7/27/1999 20:00:40 24.12 435 112.9 9.5 8.2

7/27/1999 20:30:40 24.45 433 122.2 10.2 8.3

7/27/1999 21:00:40 24.39 435 147.7 12.3 8.5

7/27/1999 21:30:40 24.5 435 153.5 12.8 8.5

7/27/1999 22:00:40 24.68 436 157.5 13.1a 8.5

7/27/1999 22:30:40 24.81 434 157.6 13.1 8.6

7/27/1999 23:00:40 24.97 432 157.6 13.0 8.6

7/27/1999 23:30:40 24.98 434 154.9 12.8 8.6

7/28/1999 0:00:40 25.02 433 152.3 12.6 8.6

7/28/1999 0:30:40 25 433 150.4 12.4 8.5

7/28/1999 1:00:40 24.98 434 147.3 12.2 8.5

7/28/1999 1:30:40 25.02 434 142.3 11.7 8.5

7/28/1999 2:00:40 25 435 137.5 11.4 8.5

7/28/1999 2:30:40 24.94 435 134.8 11.1 8.5

7/28/1999 3:00:40 24.93 435 131.4 10.9 8.5

7/28/1999 3:30:40 24.89 435 129.7 10.7 8.4

7/28/1999 4:00:40 24.84 435 128.4 10.6 8.4

7/28/1999 4:30:40 24.75 435 124.8 10.4 8.4

7/28/1999 5:00:40 24.61 436 122.1 10.2 8.4

7/28/1999 5:30:40 24.56 437 111 9.2 8.3

7/28/1999 6:00:40 24.25 441 94.5 7.9 8.1

7/28/1999 6:30:40 24.04 441 80.2 6.7 8.0

7/28/1999 7:00:40 23.98 442 79.3 6.7 8.0

7/28/1999 7:30:40 23.79 442 74 6.3 8.0

7/28/1999 8:00:40 23.7 445 73 6.2 8.0

Site 30

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
48 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/26/1999 14:30:40 23.43 445 102.2 8.7 8.1

7/26/1999 15:00:40 23.46 445 101.8 8.6 8.1

7/26/1999 15:30:40 23.41 445 102.3 8.7 8.1

7/26/1999 16:00:40 23.41 444 102.8 8.7 8.1

7/26/1999 16:30:40 23.42 444 101.1 8.6 8.1

7/26/1999 17:00:40 23.32 444 100.2 8.5 8.1

7/26/1999 17:30:40 23.33 443 100.7 8.6 8.1

7/26/1999 18:00:40 23.27 443 98.9 8.4 8.1

7/26/1999 18:30:40 23.21 443 96 8.2 8.1

7/26/1999 19:00:40 23.19 443 94.9 8.1 8.1

7/26/1999 19:30:40 23.2 443 92.4 7.9 8.1

7/26/1999 20:00:40 23.29 443 90.3 7.7 8.1

7/26/1999 20:30:40 23.24 443 89.2 7.6 8.1

7/26/1999 21:00:40 23.27 443 88.1 7.5 8.1

7/26/1999 21:30:40 23.24 443 88.7 7.6 8.1

7/26/1999 22:00:40 23.26 442 88.8 7.6 8.1

7/26/1999 22:30:40 23.28 442 88 7.5 8.1

7/26/1999 23:00:40 23.36 442 87.7 7.5 8.1

7/26/1999 23:30:40 23.36 442 88 7.5 8.1

7/27/1999 0:00:40 23.39 441 88.1 7.5 8.1

7/27/1999 0:30:40 23.39 442 88.4 7.5 8.1

7/27/1999 1:00:40 23.4 442 89 7.6 8.2

7/27/1999 1:30:40 23.45 441 89.3 7.6 8.2

7/27/1999 2:00:40 23.49 441 89.3 7.6 8.2

7/27/1999 2:30:40 23.44 441 88.5 7.5 8.2

7/27/1999 3:00:40 23.39 441 88.3 7.5 8.1

7/27/1999 3:30:40 23.44 441 88.2 7.5 8.2

7/27/1999 4:00:40 23.4 441 87.9 7.5 8.1

7/27/1999 4:30:40 23.41 441 87.9 7.5 8.1

7/27/1999 5:00:40 23.4 441 87 7.4 8.1

7/27/1999 5:30:40 23.38 440 85.9 7.3 8.1

7/27/1999 6:00:40 23.39 439 84.7 7.2 8.1

7/27/1999 6:30:40 23.31 439 83.9 7.2 8.0

7/27/1999 7:00:40 23.28 439 83.8 7.1 8.0

7/27/1999 7:30:40 23.23 438 83.3 7.1b 8.0

7/27/1999 8:00:40 23.16 438 83.9 7.2 8.0

7/27/1999 8:30:40 23.16 438 87.4 7.5 8.0

7/27/1999 9:00:40 23.11 439 89 7.6 8.0

7/27/1999 9:30:40 23.08 439 91.2 7.8 8.0

7/27/1999 10:00:40 23.08 439 95.2 8.1 8.0

7/27/1999 10:30:40 23.07 439 95.6 8.2 8.0

7/27/1999 11:00:40 23.2 440 100.4 8.6 8.1

7/27/1999 11:30:40 23.14 439 101 8.6 8.1

7/27/1999 12:00:40 23.29 439 104.4 8.9 8.1

7/27/1999 12:30:40 23.31 438 105.4 9.0 8.1

7/27/1999 13:00:40 23.29 439 105.2 9.0 8.1

7/27/1999 13:30:40 23.21 438 104.5 8.9 8.1

7/27/1999 14:00:40 22.98 439 99.7 8.6 8.1

7/27/1999 14:30:40 23.09 439 103.6 8.9 8.1

7/27/1999 15:00:40 23.17 438 105.4 9.0a 8.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 49

7/27/1999 15:30:40 22.97 438 100.1 8.6 8.1

7/27/1999 16:00:40 22.9 438 99.1 8.5 8.1

7/27/1999 16:30:40 23.05 438 103.2 8.8 8.1

7/27/1999 17:00:40 23.09 437 103.6 8.9 8.1

7/27/1999 17:30:40 22.96 438 98.5 8.5 8.1

7/27/1999 18:00:40 22.94 438 98.1 8.4 8.1

7/27/1999 18:30:40 22.97 437 99.4 8.5 8.1

7/27/1999 19:00:40 23.01 437 97.6 8.4 8.1

7/27/1999 19:30:40 22.97 437 93.8 8.0 8.1

7/27/1999 20:00:40 22.99 438 88.8 7.6 8.1

7/27/1999 20:30:40 22.99 437 86 7.4 8.0

7/27/1999 21:00:40 22.96 438 84.8 7.3 8.0

7/27/1999 21:30:40 23.07 437 86.7 7.4 8.1

7/27/1999 22:00:40 23.07 438 86 7.4 8.1

7/27/1999 22:30:40 23.09 437 86.5 7.4 8.1

7/27/1999 23:00:40 23.18 437 87.4 7.5 8.1

7/27/1999 23:30:40 23.21 437 88.4 7.5 8.1

7/28/1999 0:00:40 23.27 437 88.8 7.6 8.1

7/28/1999 0:30:40 23.24 437 87.8 7.5 8.1

7/28/1999 1:00:40 23.25 437 88.3 7.5 8.1

7/28/1999 1:30:40 23.33 436 88.8 7.6 8.1

7/28/1999 2:00:40 23.29 437 88.4 7.5 8.1

7/28/1999 2:30:40 23.31 437 88.1 7.5 8.1

7/28/1999 3:00:40 23.39 437 88.1 7.5 8.1

7/28/1999 3:30:40 23.33 437 87.8 7.5 8.1

7/28/1999 4:00:40 23.41 436 88.4 7.5 8.1

7/28/1999 4:30:40 23.42 436 88.6 7.5 8.1

7/28/1999 5:00:40 23.42 436 88.2 7.5 8.1

7/28/1999 5:30:40 23.37 436 87.8 7.5 8.1

7/28/1999 6:00:40 23.38 436 87.3 7.4 8.1

7/28/1999 6:30:40 23.37 436 86 7.3 8.0

7/28/1999 7:00:40 23.32 436 85.3 7.3 8.0

7/28/1999 7:30:40 23.3 436 87 7.4 8.0

7/28/1999 8:00:40 23.29 436 88.7 7.6 8.0

Site 32

7/12/1999 19:00:40 21.35 469 111.4 9.9 8.3

7/12/1999 19:30:40 21.28 470 110 9.7 8.3

7/12/1999 20:00:40 21.21 470 108.6 9.6 8.3

7/12/1999 20:30:40 21.14 470 107.5 9.6 8.3

7/12/1999 21:00:40 21.06 471 105.4 9.4 8.3

7/12/1999 21:30:40 21 471 103.8 9.2 8.3

7/12/1999 22:00:40 20.93 471 100.9 9.0 8.3

7/12/1999 22:30:40 20.86 472 98.4 8.8 8.3

7/12/1999 23:00:40 20.8 472 96.1 8.6 8.3

7/12/1999 23:30:40 20.75 472 93 8.3 8.3

7/13/1999 0:00:40 20.7 473 91 8.2 8.3

7/13/1999 0:30:40 20.66 473 88.1 7.9 8.2

7/13/1999 1:00:40 20.61 474 86.3 7.7 8.2

7/13/1999 1:30:40 20.54 474 84.4 7.6 8.2

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
50 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/13/1999 2:00:40 20.49 475 81.3 7.3 8.2

7/13/1999 2:30:40 20.45 475 79 7.1 8.2

7/13/1999 3:00:40 20.38 477 76.7 6.9 8.1

7/13/1999 3:30:40 20.33 478 74.8 6.7 8.1

7/13/1999 4:00:40 20.29 478 72.9 6.6 8.1

7/13/1999 4:30:40 20.25 478 70.9 6.4 8.1

7/13/1999 5:00:40 20.21 478 69.7 6.3 8.1

7/13/1999 5:30:40 20.18 478 68.2 6.2 8.0

7/13/1999 6:00:40 20.11 478 67.6 6.1 8.0

7/13/1999 6:30:40 20.08 479 66.1 6.0 8.0

7/13/1999 7:00:40 20.07 479 65.5 5.9 8.0

7/13/1999 7:30:40 20.05 479 66.7 6.1 8.0

7/13/1999 8:00:40 20.05 479 67.5 6.1 8.0

7/13/1999 8:30:40 20.05 478 70.2 6.4 8.0

7/13/1999 9:00:40 20.1 479 73.9 6.7 8.0

7/13/1999 9:30:40 20.14 478 78.2 7.1 8.0

7/13/1999 10:00:40 20.3 478 82.8 7.5 8.1

7/13/1999 10:30:40 20.51 478 89 8.0 8.1

7/13/1999 11:00:40 20.53 478 89.1 8.0 8.1

7/13/1999 11:30:40 20.81 477 93.7 8.4 8.2

7/13/1999 12:00:40 21 476 99.3 8.8 8.2

7/13/1999 12:30:40 21.21 476 106.9 9.5 8.2

7/13/1999 13:00:40 21.43 475 112.3 9.9 8.3

7/13/1999 13:30:40 21.77 474 119.7 10.5 8.3

7/13/1999 14:00:40 21.99 473 125.8 11.0 8.4

7/13/1999 14:30:40 22.21 472 131.6 11.4 8.4

7/13/1999 15:00:40 22.57 471 137.6 11.9 8.5

7/13/1999 15:30:40 22.76 470 142 12.2 8.5

7/13/1999 16:00:40 23 468 148.2 12.7 8.6

7/13/1999 16:30:40 23.04 467 152.1 13.0 8.6

7/13/1999 17:00:40 23.24 466 152.9 13.0 8.6

7/13/1999 17:30:40 23.39 465 159.9 13.6 8.7

7/13/1999 18:00:40 23.46 464 160.7 13.6 8.7

7/13/1999 18:30:40 23.53 464 160.5 13.6 8.7

7/13/1999 19:00:40 23.64 462 161.5 13.7 8.7

7/13/1999 19:30:40 23.69 462 159.7 13.5 8.7

7/13/1999 20:00:40 23.72 461 156.9 13.3 8.8

7/13/1999 20:30:40 23.73 460 154.4 13.1 8.8

7/13/1999 21:00:40 23.73 460 150.8 12.7 8.8

7/13/1999 21:30:40 23.72 459 146.1 12.4 8.8

7/13/1999 22:00:40 23.67 459 141.1 11.9 8.8

7/13/1999 22:30:40 23.62 459 137.6 11.7 8.8

7/13/1999 23:00:40 23.55 459 132.5 11.2 8.8

7/13/1999 23:30:40 23.47 459 126.5 10.7 8.8

7/14/1999 0:00:40 23.38 459 121.7 10.4 8.8

7/14/1999 0:30:40 23.27 460 115.4 9.8 8.7

7/14/1999 1:00:40 23.23 460 112.2 9.6 8.7

7/14/1999 1:30:40 23.12 461 105.3 9.0 8.7

7/14/1999 2:00:40 23.04 462 100.1 8.6 8.7

7/14/1999 2:30:40 22.94 463 95.1 8.2 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 51

7/14/1999 3:00:40 22.85 463 91.5 7.9 8.6

7/14/1999 3:30:40 22.75 456 85.9 7.4 8.6

7/14/1999 4:00:40 22.66 462 82.5 7.1 8.5

7/14/1999 4:30:40 22.6 458 80.3 6.9 8.5

7/14/1999 5:00:40 22.51 455 76.3 6.6 8.5

7/14/1999 5:30:40 22.41 469 73.2 6.4 8.4

7/14/1999 6:00:40 22.34 469 71.3 6.2 8.4

7/14/1999 6:30:40 22.24 470 68.6 6.0 8.4

7/14/1999 7:00:40 22.18 471 61.8 5.4 8.3

7/14/1999 7:30:40 22.14 471 36.7 3.2b 8.3

7/14/1999 8:00:40 22.08 467 63 5.5 8.3

7/14/1999 8:30:40 22.05 467 64 5.6 8.3

7/14/1999 9:00:40 22.03 464 61.2 5.3 8.2

7/14/1999 9:30:40 21.99 461 63.8 5.6 8.2

7/14/1999 10:00:40 21.99 472 66.4 5.8 8.2

7/14/1999 10:30:40 22 472 70.2 6.1 8.2

7/14/1999 11:00:40 22 472 76.8 6.7 8.2

7/14/1999 11:30:40 22.03 472 77.6 6.8 8.3

7/14/1999 12:00:40 22.05 472 67 5.9 8.3

7/14/1999 12:30:40 22.04 463 91.7 8.0 8.3

7/14/1999 13:00:40 22.09 471 97.4 8.5 8.3

7/14/1999 13:30:40 22.18 471 103 9.0 8.4

7/14/1999 14:00:40 22.37 470 110.4 9.6 8.4

7/14/1999 14:30:40 22.49 470 105.9 9.2 8.4

7/14/1999 15:00:40 22.75 470 119.6 10.3 8.5

7/14/1999 15:30:40 22.82 469 126.4 10.9 8.5

7/14/1999 16:00:40 22.97 468 130.1 11.2 8.5

7/14/1999 16:30:40 23.05 467 134.8 11.5 8.6

7/14/1999 17:00:40 23.17 466 140.5 12.0 8.6

7/14/1999 17:30:40 23.27 465 147.2 12.6 8.6

7/14/1999 18:00:40 23.33 465 148.2 12.6 8.7

7/14/1999 18:30:40 23.36 464 151.4 12.9 8.7

7/14/1999 19:00:40 23.34 463 150.9 12.8 8.7

7/14/1999 19:30:40 23.28 463 150 12.8 8.7

7/14/1999 20:00:40 23.25 463 147.2 12.6 8.7

7/14/1999 20:30:40 23.23 462 145.2 12.4 8.7

7/14/1999 21:00:40 23.21 462 142.3 12.1 8.8

7/14/1999 21:30:40 23.17 462 138.8 11.9 8.8

7/14/1999 22:00:40 23.12 462 135 11.5 8.8

7/14/1999 22:30:40 23.03 462 130.6 11.2 8.8

7/14/1999 23:00:40 22.96 462 126.2 10.8 8.7

7/14/1999 23:30:40 22.89 463 121.5 10.4 8.7

7/15/1999 0:00:40 22.79 464 116.4 10.0 8.7

7/15/1999 0:30:40 22.72 464 113.3 9.8 8.7

7/15/1999 1:00:40 22.65 464 104.4 9.0 8.7

7/15/1999 1:30:40 22.56 465 102.5 8.9 8.7

7/15/1999 2:00:40 22.47 466 98.9 8.6 8.7

7/15/1999 2:30:40 22.39 467 95.7 8.3 8.6

7/15/1999 3:00:40 22.31 468 91.7 8.0 8.6

7/15/1999 3:30:40 22.23 469 86.7 7.5 8.6

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
52 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/15/1999 4:00:40 22.12 470 83.4 7.3 8.5

7/15/1999 4:30:40 22.06 470 81.4 7.1 8.5

7/15/1999 5:00:40 21.97 471 77.9 6.8 8.5

7/15/1999 5:30:40 21.86 472 74.8 6.6 8.4

7/15/1999 6:00:40 21.77 473 72.2 6.3 8.4

7/15/1999 6:30:40 21.65 473 69.7 6.1 8.4

7/15/1999 7:00:40 21.59 474 62.3 5.5 8.4

7/15/1999 7:30:40 21.51 474 68 6.0 8.3

7/15/1999 8:00:40 21.51 474 67.5 6.0 8.4

7/15/1999 8:30:40 21.49 473 69.8 6.2 8.4

7/15/1999 9:00:40 21.53 473 69.6 6.1 8.4

7/15/1999 9:30:40 21.59 473 75 6.6 8.4

7/15/1999 10:00:40 21.76 472 82.3 7.2 8.4

7/15/1999 10:30:40 21.92 472 87.8 7.7 8.4

7/15/1999 11:00:40 22.04 471 89.3 7.8 8.4

7/15/1999 11:30:40 22.21 471 94.6 8.2 8.4

7/15/1999 12:00:40 22.41 470 99.8 8.6 8.5

7/15/1999 12:30:40 22.61 470 106.9 9.2 8.5

7/15/1999 13:00:40 22.83 469 110.5 9.5 8.5

7/15/1999 13:30:40 23.06 469 119.3 10.2 8.6

7/15/1999 14:00:40 23.37 263 130.6 11.1 8.6

7/15/1999 14:30:40 23.53 262 131.8 11.2 8.6

7/15/1999 15:00:40 23.92 262 144.7 12.2 8.7

7/15/1999 15:30:40 24.17 262 152 12.7 8.7

7/15/1999 16:00:40 24.35 261 155.3 13.0 8.7

7/15/1999 16:30:40 24.57 261 158.8 13.2 8.7

7/15/1999 17:00:40 24.71 260 162.9 13.5 8.8

7/15/1999 17:30:40 24.83 260 162.4 13.5 8.8

7/15/1999 18:00:40 25 260 166.5 13.8 8.8

7/15/1999 18:30:40 25.06 260 163 13.4 8.8

7/15/1999 19:00:40 25.15 259 163.9 13.5 8.8

7/15/1999 19:30:40 25.2 259 159.1 13.1 8.8

7/15/1999 20:00:40 25.24 259 154.9 12.7 8.8

7/15/1999 20:30:40 25.3 259 149.6 12.3 8.9

7/15/1999 21:00:40 25.31 258 148.3 12.2 8.9

7/15/1999 21:30:40 25.29 257 144.2 11.8 8.9

7/15/1999 22:00:40 25.25 257 139.1 11.4 8.9

7/15/1999 22:30:40 25.2 256 133 10.9 8.9

7/15/1999 23:00:40 25.12 257 129.4 10.7 8.8

7/15/1999 23:30:40 25.05 257 124.3 10.3 8.8

7/16/1999 0:00:40 24.99 257 118.6 9.8 8.8

7/16/1999 0:30:40 24.92 257 111.5 9.2 8.8

7/16/1999 1:00:40 24.84 257 107.4 8.9 8.8

7/16/1999 1:30:40 24.77 258 99.3 8.2 8.8

7/16/1999 2:00:40 24.69 258 98 8.1 8.7

7/16/1999 2:30:40 24.62 258 92.5 7.7 8.7

7/16/1999 3:00:40 24.52 259 85.8 7.2 8.7

7/16/1999 3:30:40 24.41 381 83.2 7.0 8.7

7/16/1999 4:00:40 24.31 416 77.2 6.5 8.6

7/16/1999 4:30:40 24.18 426 73.2 6.1 8.6

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 53

7/16/1999 5:00:40 24.08 431 70.6 5.9 8.5

7/16/1999 5:30:40 23.98 428 67.4 5.7 8.5

7/16/1999 6:00:40 23.87 461 63.3 5.3 8.5

7/16/1999 6:30:40 23.79 460 62 5.2 8.4

7/16/1999 7:00:40 23.7 461 62 5.2 8.4

7/16/1999 7:30:40 23.61 458 64.6 5.5 8.4

7/16/1999 8:00:40 23.56 459 65.2 5.5 8.4

7/16/1999 8:30:40 23.6 466 70.6 6.0 8.4

7/16/1999 9:00:40 23.63 466 76.2 6.5 8.4

7/16/1999 9:30:40 23.73 466 81.2 6.9 8.5

7/16/1999 10:00:40 23.84 466 87 7.3 8.5

7/16/1999 10:30:40 23.97 465 93.5 7.9 8.5

7/16/1999 11:00:40 24.05 465 99.8 8.4 8.5

7/16/1999 11:30:40 24.22 465 105.8 8.9 8.6

7/16/1999 12:00:40 24.39 464 111.9 9.3 8.6

7/16/1999 12:30:40 24.54 463 115.5 9.6 8.6

7/16/1999 13:00:40 24.74 463 121.8 10.1 8.6

7/16/1999 13:30:40 24.93 462 128 10.6 8.6

7/16/1999 14:00:40 25.16 462 136 11.2 8.7

7/16/1999 14:30:40 25.42 460 144.7 11.9 8.7

7/16/1999 15:00:40 25.55 460 149.3 12.2 8.7

7/16/1999 15:30:40 25.74 459 153.4 12.5 8.7

7/16/1999 16:00:40 26.03 457 162 13.1 8.8

7/16/1999 16:30:40 26.19 456 165.6 13.4 8.8

7/16/1999 17:00:40 26.35 455 170.2 13.7 8.8

7/16/1999 17:30:40 26.48 454 172.5 13.9 8.8

7/16/1999 18:00:40 26.58 453 174 14.0 8.9

7/16/1999 18:30:40 26.65 452 174.4 14.0 8.9

7/16/1999 19:00:40 26.67 451 171.2 13.7 8.9

7/16/1999 19:30:40 26.63 451 165.5 13.3 8.9

7/16/1999 20:00:40 26.57 451 157.1 12.6 8.9

7/16/1999 20:30:40 26.51 450 151.9 12.2 8.9

7/16/1999 21:00:40 26.45 450 148.7 12.0 8.9

7/16/1999 21:30:40 26.37 450 143.7 11.6 8.9

7/16/1999 22:00:40 26.29 450 137.8 11.1 8.9

7/16/1999 22:30:40 26.19 451 132.3 10.7 8.9

7/16/1999 23:00:40 26.09 451 128.3 10.4 8.9

7/16/1999 23:30:40 26 451 121.9 9.9 8.9

7/17/1999 0:00:40 25.91 452 116.2 9.4 8.8

7/17/1999 0:30:40 25.82 453 109.2 8.9 8.8

7/17/1999 1:00:40 25.74 453 103.4 8.4 8.8

7/17/1999 1:30:40 25.64 455 96.3 7.9 8.8

7/17/1999 2:00:40 25.55 456 90.2 7.4 8.7

7/17/1999 2:30:40 25.46 456 88.5 7.3 8.7

7/17/1999 3:00:40 25.33 458 80.7 6.6 8.7

7/17/1999 3:30:40 25.24 459 77.4 6.4 8.6

7/17/1999 4:00:40 25.12 460 72.3 6.0 8.6

7/17/1999 4:30:40 25 461 68.9 5.7 8.6

7/17/1999 5:00:40 24.88 462 65.8 5.4 8.5

7/17/1999 5:30:40 24.77 463 62.4 5.2 8.5

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
54 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/17/1999 6:00:40 24.67 464 59.4 4.9 8.5

7/17/1999 6:30:40 24.58 464 57.2 4.8 8.4

7/17/1999 7:00:40 24.49 465 60.5 5.0 8.4

7/17/1999 7:30:40 24.42 454 64.1 5.4 8.4

7/17/1999 8:00:40 24.38 464 67.4 5.6 8.4

7/17/1999 8:30:40 24.39 467 74.6 6.2 8.5

7/17/1999 9:00:40 24.45 465 80.2 6.7 8.5

7/17/1999 9:30:40 24.52 464 82.4 6.9 8.5

7/17/1999 10:00:40 24.66 464 93.7 7.8 8.6

7/17/1999 10:30:40 24.8 464 96 8.0 8.6

7/17/1999 11:00:40 24.89 463 99.5 8.2 8.6

7/17/1999 11:30:40 25.02 463 110.1 9.1 8.7

7/17/1999 12:00:40 25.12 463 111.2 9.2 8.7

7/17/1999 12:30:40 25.35 462 119.4 9.8 8.8

7/17/1999 13:00:40 25.6 461 126.7 10.4 8.8

7/17/1999 13:30:40 25.75 461 135.1 11.0 8.7

7/17/1999 14:00:40 26.02 459 140 11.3 8.8

7/17/1999 14:30:40 26.28 457 147.8 11.9 8.8

7/17/1999 15:00:40 26.5 457 148.9 12.0 8.7

7/17/1999 15:30:40 26.72 456 158.1 12.7 8.8

7/17/1999 16:00:40 26.96 455 163.6 13.0 8.8

7/17/1999 16:30:40 27.13 453 169.7 13.5 8.8

7/17/1999 17:00:40 27.28 452 173.5 13.7 8.9

7/17/1999 17:30:40 27.33 451 171.2 13.6 8.8

7/17/1999 18:00:40 27.36 451 167.7 13.3 8.8

7/17/1999 18:30:40 27.35 451 163.4 12.9 8.9

7/17/1999 19:00:40 27.38 450 160.6 12.7 8.9

7/17/1999 19:30:40 27.35 450 154.4 12.2 8.9

7/17/1999 20:00:40 27.28 449 147.9 11.7 8.9

7/17/1999 20:30:40 27.2 449 140.5 11.2 8.8

7/17/1999 21:00:40 27.1 449 134.9 10.7 8.8

7/17/1999 21:30:40 27.02 448 127.1 10.1 8.8

7/17/1999 22:00:40 26.91 450 129.5 10.3 8.8

7/17/1999 22:30:40 26.79 449 125 10.0 8.8

7/17/1999 23:00:40 26.69 450 119 9.5 8.8

7/17/1999 23:30:40 26.6 451 111.9 9.0 8.8

7/18/1999 0:00:40 26.5 452 104.4 8.4 8.7

7/18/1999 0:30:40 26.42 452 99.3 8.0 8.7

7/18/1999 1:00:40 26.35 454 92.6 7.5 8.7

7/18/1999 1:30:40 26.29 454 89.7 7.2 8.7

7/18/1999 2:00:40 26.19 456 84.5 6.8 8.6

7/18/1999 2:30:40 26.1 457 78.8 6.4 8.6

7/18/1999 3:00:40 26 457 74.3 6.0 8.5

7/18/1999 3:30:40 25.91 458 71.3 5.8 8.5

7/18/1999 4:00:40 25.8 459 66.1 5.4 8.5

7/18/1999 4:30:40 25.68 460 64.7 5.3 8.5

7/18/1999 5:00:40 25.57 461 60.5 4.9 8.3

7/18/1999 5:30:40 25.47 462 58.4 4.8 8.4

7/18/1999 6:00:40 25.39 462 55.6 4.6 8.4

7/18/1999 6:30:40 25.27 463 53.6 4.4 8.3

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 55

7/18/1999 7:00:40 25.19 463 52.4 4.3 8.3

7/18/1999 7:30:40 25.14 463 54.9 4.5 8.4

7/18/1999 8:00:40 25.06 463 58.1 4.8 8.4

7/18/1999 8:30:40 25.04 463 59.9 4.9 8.4

7/18/1999 9:00:40 25.05 463 72.2 6.0 8.4

7/18/1999 9:30:40 25.11 463 75 6.2 8.5

7/18/1999 10:00:40 25.2 463 82.7 6.8 8.5

7/18/1999 10:30:40 25.29 461 88.3 7.3 8.6

7/18/1999 11:00:40 25.46 460 97.4 8.0 8.7

7/18/1999 11:30:40 25.57 460 100.8 8.2 8.7

7/18/1999 12:00:40 25.69 460 105.2 8.6 8.5

7/18/1999 12:30:40 25.79 461 115.6 9.4 8.7

7/18/1999 13:00:40 25.99 460 124.9 10.1 8.7

7/18/1999 13:30:40 26.24 458 133.9 10.8 8.8

7/18/1999 14:00:40 26.25 457 135.3 10.9 8.7

7/18/1999 14:30:40 26.49 457 144.3 11.6 8.8

7/18/1999 15:00:40 26.55 457 139.2 11.2 8.7

7/18/1999 15:30:40 26.65 456 144.5 11.6 8.7

7/18/1999 16:00:40 26.75 455 152.4 12.2 8.8

7/18/1999 16:30:40 26.85 453 160.6 12.8 8.8

7/18/1999 17:00:40 26.95 452 167.9 13.4 8.9

7/18/1999 17:30:40 27.02 451 169.9 13.5 8.9

7/18/1999 18:00:40 27.04 451 165.6 13.2 8.9

7/18/1999 18:30:40 27.05 450 166 13.2 8.9

7/18/1999 19:00:40 27.04 449 164.8 13.1 8.9

7/18/1999 19:30:40 27.01 449 155.3 12.4 8.8

7/18/1999 20:00:40 26.97 449 151.7 12.1 8.9

7/18/1999 20:30:40 26.92 449 144.5 11.5 8.9

7/18/1999 21:00:40 26.87 449 141.7 11.3 8.9

7/18/1999 21:30:40 26.81 449 135.5 10.8 8.8

7/18/1999 22:00:40 26.75 449 130 10.4 8.8

7/18/1999 22:30:40 26.66 449 122.5 9.8 8.8

7/18/1999 23:00:40 26.58 449 119.5 9.6 8.8

7/18/1999 23:30:40 26.49 450 115.9 9.3 8.8

7/19/1999 0:00:40 26.39 451 109.9 8.8 8.8

7/19/1999 0:30:40 26.31 452 104 8.4 8.8

7/19/1999 1:00:40 26.21 453 98 7.9 8.7

7/19/1999 1:30:40 26.11 453 94.7 7.7 8.7

7/19/1999 2:00:40 26.01 454 89.7 7.3 8.7

7/19/1999 2:30:40 25.91 455 83.1 6.7 8.7

7/19/1999 3:00:40 25.8 457 77.5 6.3 8.6

7/19/1999 3:30:40 25.69 458 70.7 5.8 8.6

7/19/1999 4:00:40 25.62 459 69.4 5.7 8.6

7/19/1999 4:30:40 25.47 459 66.3 5.4 8.5

7/19/1999 5:00:40 25.35 461 62.5 5.1 8.5

7/19/1999 5:30:40 25.27 462 58.1 4.8 8.4

7/19/1999 6:00:40 25.14 463 55.4 4.6 8.4

7/19/1999 6:30:40 25.05 464 54.7 4.5 8.3

7/19/1999 7:00:40 24.97 464 55.7 4.6 8.3

7/19/1999 7:30:40 24.93 464 61.6 5.1 8.4

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
56 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/19/1999 8:00:40 24.88 464 71 5.9 8.4

7/19/1999 8:30:40 24.87 464 82.9 6.9 8.5

7/19/1999 9:00:40 24.92 464 89.7 7.4 8.6

7/19/1999 9:30:40 24.99 463 97.4 8.0 8.6

7/19/1999 10:00:40 25.1 463 107 8.8 8.7

7/19/1999 10:30:40 25.23 462 121.6 10.0 8.7

7/19/1999 11:00:40 25.36 461 122.2 10.0 8.7

7/19/1999 11:30:40 25.51 461 126.1 10.3 8.8

7/19/1999 12:00:40 25.67 460 131.3 10.7 8.9

7/19/1999 12:30:40 25.7 460 120.8 9.8 8.7

7/19/1999 13:00:40 25.83 460 128.8 10.5 8.9

7/19/1999 13:30:40 26.04 459 126.8 10.3 8.7

7/19/1999 14:00:40 26.16 457 146.5 11.8 8.8

7/19/1999 14:30:40 26.29 457 151.8 12.2 8.8

7/19/1999 15:00:40 26.52 456 154.3 12.4 8.8

7/19/1999 15:30:40 26.66 455 162.1 13.0 8.8

7/19/1999 16:00:40 26.76 455 158.7 12.7 8.7

7/19/1999 16:30:40 26.95 453 180 14.3 8.9

7/19/1999 17:00:40 27.04 452 177.3 14.1 8.8

7/19/1999 17:30:40 27.11 451 181.6 14.4a 8.8

7/19/1999 18:00:40 27.14 451 174.2 13.8 8.9

7/19/1999 18:30:40 27.18 451 162.6 12.9 8.9

7/19/1999 19:00:40 27.2 450 159.9 12.7 8.9

7/19/1999 19:30:40 27.19 450 154.2 12.2 8.8

7/19/1999 20:00:40 27.15 450 148.2 11.8 8.8

7/19/1999 20:30:40 27.12 449 145.1 11.5 8.8

7/19/1999 21:00:40 27.07 450 140.5 11.2 8.8

7/19/1999 21:30:40 27.01 450 133.7 10.6 8.8

7/19/1999 22:00:40 26.95 450 131.4 10.5 8.8

7/19/1999 22:30:40 26.89 451 122.1 9.7 8.8

7/19/1999 23:00:40 26.81 451 116.3 9.3 8.8

7/19/1999 23:30:40 26.73 452 112.5 9.0 8.8

7/20/1999 0:00:40 26.64 452 108.8 8.7 8.7

7/20/1999 0:30:40 26.57 455 99.4 8.0 8.7

7/20/1999 1:00:40 26.49 455 93.7 7.5 8.7

7/20/1999 1:30:40 26.4 456 90.1 7.3 8.7

7/20/1999 2:00:40 26.32 457 81.6 6.6 8.7

7/20/1999 2:30:40 26.22 457 74.4 6.0 8.6

7/20/1999 3:00:40 26.12 459 69.7 5.6 8.6

7/20/1999 3:30:40 26.03 461 67.3 5.5 8.5

7/20/1999 4:00:40 25.94 461 63 5.1 8.5

7/20/1999 4:30:40 25.83 461 58 4.7 8.5

7/20/1999 5:00:40 25.71 461 54 4.4 8.4

7/20/1999 5:30:40 25.63 462 50.6 4.1 8.4

7/20/1999 6:00:40 25.52 463 47.8 3.9 8.3

7/20/1999 6:30:40 25.42 464 45.3 3.7 8.3

7/20/1999 7:00:40 25.34 464 44.2 3.6 8.3

7/20/1999 7:30:40 25.29 465 44.5 3.7 8.3

7/20/1999 8:00:40 25.22 465 43.6 3.6 8.3

7/20/1999 8:30:40 25.16 465 48.7 4.0 8.3

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 57

7/20/1999 9:00:40 25.15 465 54.9 4.5 8.3

7/20/1999 9:30:40 25.13 465 59.1 4.9 8.4

7/20/1999 10:00:40 25.21 465 77.5 6.4 8.6

7/20/1999 10:30:40 25.26 464 79 6.5 8.5

7/20/1999 11:00:40 25.39 463 83.8 6.9 8.6

7/20/1999 11:30:40 25.43 463 92.6 7.6 8.6

7/20/1999 12:00:40 25.56 463 92.8 7.6 8.6

7/20/1999 12:30:40 25.58 463 83.9 6.9 8.5

7/20/1999 13:00:40 25.71 463 111.6 9.1 8.7

7/20/1999 13:30:40 25.79 462 127.1 10.3 8.7

7/20/1999 14:00:40 25.88 460 125.8 10.2 8.7

7/20/1999 14:30:40 25.97 460 125.2 10.2 8.7

7/20/1999 15:00:40 26.1 459 142 11.5 8.8

7/20/1999 15:30:40 26.14 458 127.9 10.3 8.7

7/20/1999 16:00:40 26.24 457 139 11.2 8.7

Site 34

7/12/1999 18:30:40 21.4 – 104.4 9.2 8.3

7/12/1999 19:00:40 21.36 – 104.4 9.2 8.3

7/12/1999 19:30:40 21.24 – 103.3 9.2 8.3

7/12/1999 20:00:40 21.1 – 101.7 9.1 8.3

7/12/1999 20:30:40 21.01 – 100.4 9.0 8.3

7/12/1999 21:00:40 20.93 – 99.2 8.9 8.3

7/12/1999 21:30:40 20.86 – 97.5 8.7 8.3

7/12/1999 22:00:40 20.8 – 95.8 8.6 8.3

7/12/1999 22:30:40 20.77 – 95.1 8.5 8.3

7/12/1999 23:00:40 20.73 – 93.1 8.3 8.3

7/12/1999 23:30:40 20.68 – 92.1 8.3 8.3

7/13/1999 0:00:40 20.58 – 90.2 8.1 8.3

7/13/1999 0:30:40 20.5 – 88.3 8.0 8.2

7/13/1999 1:00:40 20.43 – 85.8 7.7 8.2

7/13/1999 1:30:40 20.38 – 84.5 7.6 8.2

7/13/1999 2:00:40 20.32 – 82.1 7.4 8.2

7/13/1999 2:30:40 20.31 – 80.9 7.3 8.2

7/13/1999 3:00:40 20.28 – 78.9 7.1 8.2

7/13/1999 3:30:40 20.22 – 76.9 7.0 8.1

7/13/1999 4:00:40 20.14 – 75.7 6.9 8.1

7/13/1999 4:30:40 20.07 – 73.9 6.7 8.1

7/13/1999 5:00:40 20.02 – 72.5 6.6 8.1

7/13/1999 5:30:40 19.97 – 71.2 6.5 8.1

7/13/1999 6:00:40 19.95 – 70.2 6.4 8.0

7/13/1999 6:30:40 19.94 – 69.5 6.3 8.0

7/13/1999 7:00:40 19.96 – 70.3 6.4 8.0

7/13/1999 7:30:40 19.95 – 71.7 6.5 8.0

7/13/1999 8:00:40 19.85 – 73.8 6.7 8.0

7/13/1999 8:30:40 19.84 – 75.2 6.9 8.0

7/13/1999 9:00:40 19.88 – 79.3 7.2 8.1

7/13/1999 9:30:40 19.97 – 83.2 7.6 8.1

7/13/1999 10:00:40 20.17 – 87.5 7.9 8.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
58 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/13/1999 10:30:40 20.49 – 93 8.4 8.1

7/13/1999 11:00:40 20.67 – 97.3 8.7 8.2

7/13/1999 11:30:40 21.06 – 103.2 9.2 8.2

7/13/1999 12:00:40 21.37 – 108.6 9.6 8.3

7/13/1999 12:30:40 21.58 480 115.6 10.2 8.3

7/13/1999 13:00:40 21.71 480 119 10.5 8.3

7/13/1999 13:30:40 22.17 479 126.3 11.0 8.4

7/13/1999 14:00:40 22.37 477 130.6 11.3 8.4

7/13/1999 14:30:40 22.72 476 136 11.7 8.5

7/13/1999 15:00:40 22.95 474 141.5 12.1 8.5

7/13/1999 15:30:40 23.02 473 144.8 12.4 8.5

7/13/1999 16:00:40 23.26 472 148.7 12.7 8.6

7/13/1999 16:30:40 23.32 469 150.8 12.8 8.6

7/13/1999 17:00:40 23.46 467 153.6 13.1 8.6

7/13/1999 17:30:40 23.6 465 154.7 13.1 8.7

7/13/1999 18:00:40 23.67 462 155.2 13.1 8.7

7/13/1999 18:30:40 23.63 460 153.3 13.0 8.7

7/13/1999 19:00:40 23.59 459 151.8 12.9 8.7

7/13/1999 19:30:40 23.52 458 148.9 12.6 8.7

7/13/1999 20:00:40 23.47 457 145.4 12.4 8.7

7/13/1999 20:30:40 23.41 455 141.2 12.0 8.7

7/13/1999 21:00:40 23.42 455 138.8 11.8 8.7

7/13/1999 21:30:40 23.44 454 136.8 11.6 8.7

7/13/1999 22:00:40 23.44 453 133.2 11.3 8.7

7/13/1999 22:30:40 23.42 453 130.3 11.1 8.7

7/13/1999 23:00:40 23.34 453 126.6 10.8 8.7

7/13/1999 23:30:40 23.24 454 122 10.4 8.7

7/14/1999 0:00:40 23.15 455 118.7 10.1 8.7

7/14/1999 0:30:40 23.1 456 115.3 9.9 8.7

7/14/1999 1:00:40 23.05 457 111.5 9.5 8.7

7/14/1999 1:30:40 22.99 458 107.5 9.2 8.6

7/14/1999 2:00:40 22.92 460 104.1 8.9 8.6

7/14/1999 2:30:40 22.79 462 99.7 8.6 8.6

7/14/1999 3:00:40 22.68 464 95 8.2 8.6

7/14/1999 3:30:40 22.59 465 91.6 7.9 8.6

7/14/1999 4:00:40 22.53 466 88.1 7.6 8.5

7/14/1999 4:30:40 22.48 467 84.6 7.3 8.5

7/14/1999 5:00:40 22.43 469 82 7.1 8.5

7/14/1999 5:30:40 22.35 471 78.6 6.8 8.4

7/14/1999 6:00:40 22.26 472 75.7 6.6 8.4

7/14/1999 6:30:40 22.15 475 73.6 6.4 8.4

7/14/1999 7:00:40 22.06 476 72.3 6.3 8.3

7/14/1999 7:30:40 22.02 477 71.4 6.2 8.3

7/14/1999 8:00:40 22.02 476 70.8 6.2 8.3

7/14/1999 8:30:40 22 477 71.8 6.3 8.3

7/14/1999 9:00:40 21.98 477 72.9 6.4 8.3

7/14/1999 9:30:40 21.94 477 75.3 6.6 8.3

7/14/1999 10:00:40 21.92 477 78.3 6.8 8.3

7/14/1999 10:30:40 21.94 477 82.2 7.2 8.3

7/14/1999 11:00:40 21.96 477 84.8 7.4 8.3

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 59

7/14/1999 11:30:40 22.03 477 89 7.8 8.3

7/14/1999 12:00:40 22.05 476 91.5 8.0 8.3

7/14/1999 12:30:40 22.06 476 95 8.3 8.3

7/14/1999 13:00:40 22.11 477 100 8.7 8.4

7/14/1999 13:30:40 22.35 476 107.9 9.4 8.4

7/14/1999 14:00:40 22.61 476 113.9 9.8 8.4

7/14/1999 14:30:40 22.7 475 120 10.3 8.5

7/14/1999 15:00:40 22.99 473 126.2 10.8 8.5

7/14/1999 15:30:40 23.2 473 131 11.2 8.5

7/14/1999 16:00:40 23.35 473 134.6 11.5 8.5

7/14/1999 16:30:40 23.45 472 139.6 11.9 8.6

7/14/1999 17:00:40 23.48 469 142.8 12.1 8.6

7/14/1999 17:30:40 23.51 470 142.7 12.1 8.6

7/14/1999 18:00:40 23.52 298 150.1 12.7 8.6

7/14/1999 18:30:40 23.5 291 149 12.7 8.6

7/14/1999 19:00:40 23.45 284 148.6 12.6 8.7

7/14/1999 19:30:40 23.32 279 145.7 12.4 8.7

7/14/1999 20:00:40 23.19 274 141.4 12.1 8.7

7/14/1999 20:30:40 23.06 271 136.8 11.7 8.6

7/14/1999 21:00:40 22.97 269 133.3 11.4 8.6

7/14/1999 21:30:40 22.92 267 130.8 11.2 8.7

7/14/1999 22:00:40 22.87 266 128.3 11.0 8.7

7/14/1999 22:30:40 22.84 266 126.4 10.9 8.7

7/14/1999 23:00:40 22.79 267 123.5 10.6 8.7

7/14/1999 23:30:40 22.7 269 120.1 10.4 8.7

7/15/1999 0:00:40 22.57 272 115.8 10.0 8.6

7/15/1999 0:30:40 22.46 276 112.1 9.7 8.6

7/15/1999 1:00:40 22.38 280 108.5 9.4 8.6

7/15/1999 1:30:40 22.32 285 105.4 9.2 8.6

7/15/1999 2:00:40 22.27 290 101.8 8.9 8.6

7/15/1999 2:30:40 22.21 294 97.9 8.5 8.6

7/15/1999 3:00:40 22.15 299 95.4 8.3 8.6

7/15/1999 3:30:40 22.01 304 91.4 8.0 8.5

7/15/1999 4:00:40 21.91 308 88.7 7.8 8.5

7/15/1999 4:30:40 21.83 314 85.8 7.5 8.5

7/15/1999 5:00:40 21.75 318 82.7 7.3 8.5

7/15/1999 5:30:40 21.69 323 80.2 7.1 8.4

7/15/1999 6:00:40 21.63 328 77.4 6.8 8.4

7/15/1999 6:30:40 21.57 333 76.1 6.7 8.4

7/15/1999 7:00:40 21.47 338 75.7 6.7 8.4

7/15/1999 7:30:40 21.37 341 76.5 6.8 8.3

7/15/1999 8:00:40 21.34 344 79 7.0 8.3

7/15/1999 8:30:40 21.36 347 81 7.2 8.3

7/15/1999 9:00:40 21.4 349 83 7.3 8.3

7/15/1999 9:30:40 21.43 351 86.4 7.6 8.3

7/15/1999 10:00:40 21.63 353 98 8.6 8.4

7/15/1999 10:30:40 21.78 354 105.9 9.3 8.4

7/15/1999 11:00:40 22.08 353 112.8 9.8 8.4

7/15/1999 11:30:40 22.37 353 118.9 10.3 8.5

7/15/1999 12:00:40 22.7 351 123.3 10.6 8.5

7/15/1999 12:30:40 23 350 127.4 10.9 8.5

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
60 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/15/1999 13:00:40 23.31 348 130.4 11.1 8.6

7/15/1999 13:30:40 23.62 344 135.1 11.4 8.6

7/15/1999 14:00:40 23.92 468 139.3 11.7 8.6

7/15/1999 14:30:40 23.94 467 136.1 11.5 8.6

7/15/1999 15:00:40 24.23 466 145.7 12.2 8.6

7/15/1999 15:30:40 24.42 465 150.5 12.6 8.6

7/15/1999 16:00:40 24.67 462 154.9 12.9 8.7

7/15/1999 16:30:40 24.9 460 158.7 13.1 8.7

7/15/1999 17:00:40 25.01 457 161.9 13.4 8.7

7/15/1999 17:30:40 25.01 454 160.3 13.2 8.7

7/15/1999 18:00:40 25.1 451 161.8 13.3 8.8

7/15/1999 18:30:40 25.13 449 160.7 13.2 8.8

7/15/1999 19:00:40 25.09 447 158.3 13.1 8.8

7/15/1999 19:30:40 25.06 444 155.4 12.8 8.8

7/15/1999 20:00:40 25.03 442 151.4 12.5 8.8

7/15/1999 20:30:40 25.01 442 146.5 12.1 8.8

7/15/1999 21:00:40 25.03 460 143 11.8 8.8

7/15/1999 21:30:40 25.03 460 139.3 11.5 8.8

7/15/1999 22:00:40 25 460 135.6 11.2 8.8

7/15/1999 22:30:40 24.96 460 132.3 10.9 8.8

7/15/1999 23:00:40 24.86 461 127.5 10.6 8.8

7/15/1999 23:30:40 24.77 461 122.7 10.2 8.7

7/16/1999 0:00:40 24.73 461 119.6 9.9 8.7

7/16/1999 0:30:40 24.69 460 113.7 9.4 8.7

7/16/1999 1:00:40 24.64 461 110.7 9.2 8.7

7/16/1999 1:30:40 24.58 461 107.2 8.9 8.7

7/16/1999 2:00:40 24.45 462 102.2 8.5 8.7

7/16/1999 2:30:40 24.35 463 98.3 8.2 8.7

7/16/1999 3:00:40 24.26 464 94.3 7.9 8.6

7/16/1999 3:30:40 24.17 464 90.5 7.6 8.6

7/16/1999 4:00:40 24.06 465 86.2 7.2 8.6

7/16/1999 4:30:40 23.99 466 82.9 7.0 8.6

7/16/1999 5:00:40 23.93 468 79.7 6.7 8.5

7/16/1999 5:30:40 23.85 467 76.1 6.4 8.5

7/16/1999 6:00:40 23.75 467 73.1 6.2 8.5

7/16/1999 6:30:40 23.61 469 71 6.0 8.4

7/16/1999 7:00:40 23.5 469 70.3 6.0 8.4

7/16/1999 7:30:40 23.46 469 71 6.0 8.4

7/16/1999 8:00:40 23.4 470 71.8 6.1 8.4

7/16/1999 8:30:40 23.38 470 73.1 6.2 8.4

7/16/1999 9:00:40 23.42 469 75.4 6.4 8.4

7/16/1999 9:30:40 23.6 469 81 6.9 8.4

7/16/1999 10:00:40 23.79 469 86.5 7.3 8.4

7/16/1999 10:30:40 23.95 468 90.6 7.6 8.4

7/16/1999 11:00:40 24.2 467 96.8 8.1 8.5

7/16/1999 11:30:40 24.64 466 105 8.7 8.5

7/16/1999 12:00:40 24.78 465 109.7 9.1 8.5

7/16/1999 12:30:40 25.04 465 116.4 9.6 8.6

7/16/1999 13:00:40 25.35 464 123.8 10.2 8.6

7/16/1999 13:30:40 25.51 464 129.4 10.6 8.6

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 61

7/16/1999 14:00:40 25.76 462 135 11.0 8.6

7/16/1999 14:30:40 25.98 461 141.2 11.5 8.7

7/16/1999 15:00:40 26.04 461 143.7 11.6 8.7

7/16/1999 15:30:40 26.08 459 148 12.0 8.8

7/16/1999 16:00:40 26.34 457 153.9 12.4 8.8

7/16/1999 16:30:40 26.53 457 160.4 12.9 8.8

7/16/1999 17:00:40 26.64 456 165.1 13.2 8.8

7/16/1999 17:30:40 26.72 455 168 13.4a 8.8

7/16/1999 18:00:40 26.77 453 167.8 13.4 8.8

7/16/1999 18:30:40 26.76 451 167.8 13.4 8.8

7/16/1999 19:00:40 26.72 450 163.1 13.1 8.8

7/16/1999 19:30:40 26.65 448 160.6 12.9 8.8

7/16/1999 20:00:40 26.54 447 154.1 12.4 8.8

7/16/1999 20:30:40 26.41 447 148.1 11.9 8.8

7/16/1999 21:00:40 26.28 447 143.8 11.6 8.8

7/16/1999 21:30:40 26.17 447 139.3 11.3 8.8

7/16/1999 22:00:40 26.09 447 136 11.0 8.8

7/16/1999 22:30:40 26.01 447 132.1 10.7 8.8

7/16/1999 23:00:40 25.94 448 128.4 10.4 8.8

7/16/1999 23:30:40 25.87 448 124 10.1 8.8

7/17/1999 0:00:40 25.78 449 119.9 9.8 8.8

7/17/1999 0:30:40 25.64 450 114.6 9.4 8.7

7/17/1999 1:00:40 25.51 452 109.9 9.0 8.7

7/17/1999 1:30:40 25.4 453 104.5 8.6 8.7

7/17/1999 2:00:40 25.3 454 99.7 8.2 8.7

7/17/1999 2:30:40 25.21 455 95.6 7.9 8.7

7/17/1999 3:00:40 25.12 456 91.8 7.6 8.6

7/17/1999 3:30:40 25.04 457 87.5 7.2 8.6

7/17/1999 4:00:40 24.97 459 83.1 6.9 8.6

7/17/1999 4:30:40 24.87 460 79.6 6.6 8.5

7/17/1999 5:00:40 24.71 462 75.4 6.3 8.5

7/17/1999 5:30:40 24.57 464 72.5 6.0 8.5

7/17/1999 6:00:40 24.45 464 69.6 5.8 8.4

7/17/1999 6:30:40 24.35 465 67.7 5.7 8.4

7/17/1999 7:00:40 24.31 466 66.8 5.6 8.4

7/17/1999 7:30:40 24.27 467 68 5.7 8.4

7/17/1999 8:00:40 24.24 466 69.2 5.8 8.4

7/17/1999 8:30:40 24.23 466 71.3 6.0 8.4

7/17/1999 9:00:40 24.22 467 74 6.2 8.4

7/17/1999 9:30:40 24.31 467 79.8 6.7 8.5

7/17/1999 10:00:40 24.46 466 92.7 7.7 8.6

7/17/1999 10:30:40 24.84 464 101 8.4 8.6

7/17/1999 11:00:40 24.99 464 104.4 8.6 8.6

7/17/1999 11:30:40 25.23 463 109.2 9.0 8.6

7/17/1999 12:00:40 25.49 462 112.5 9.2 8.6

7/17/1999 12:30:40 25.68 462 120 9.8 8.6

7/17/1999 13:00:40 25.94 461 126.5 10.3 8.6

7/17/1999 13:30:40 26.11 460 131.7 10.7 8.6

7/17/1999 14:00:40 26.55 458 141.3 11.3 8.7

7/17/1999 14:30:40 26.75 458 143.6 11.5 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
62 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/17/1999 15:00:40 26.98 457 150.1 12.0 8.7

7/17/1999 15:30:40 27.22 456 155.2 12.3 8.7

7/17/1999 16:00:40 27.32 454 160.1 12.7 8.7

7/17/1999 16:30:40 27.4 438 156.3 12.4 8.7

7/17/1999 17:00:40 27.53 435 155.9 12.3 8.7

7/17/1999 17:30:40 27.58 431 157.3 12.4 8.8

7/17/1999 18:00:40 27.5 429 154.3 12.2 8.8

7/17/1999 18:30:40 27.4 427 152 12.0 8.8

7/17/1999 19:00:40 27.32 426 149.7 11.9 8.8

7/17/1999 19:30:40 27.19 424 146.8 11.7 8.8

7/17/1999 20:00:40 27.08 425 143.2 11.4 8.8

7/17/1999 20:30:40 27.01 424 138.6 11.0 8.8

7/17/1999 21:00:40 26.96 423 136.2 10.9 8.8

7/17/1999 21:30:40 26.91 424 133.2 10.6 8.8

7/17/1999 22:00:40 26.84 423 129.5 10.3 8.7

7/17/1999 22:30:40 26.74 424 125.6 10.1 8.7

7/17/1999 23:00:40 26.58 426 121.4 9.7 8.7

7/17/1999 23:30:40 26.46 428 115.9 9.3 8.7

7/18/1999 0:00:40 26.34 429 109.8 8.8 8.7

7/18/1999 0:30:40 26.23 431 104.6 8.4 8.7

7/18/1999 1:00:40 26.18 432 99.8 8.1 8.7

7/18/1999 1:30:40 26.12 434 95.5 7.7 8.6

7/18/1999 2:00:40 26.04 436 91.3 7.4 8.6

7/18/1999 2:30:40 25.9 438 86.4 7.0 8.6

7/18/1999 3:00:40 25.76 441 82.5 6.7 8.6

7/18/1999 3:30:40 25.67 443 79.3 6.5 8.5

7/18/1999 4:00:40 25.56 445 75.1 6.1 8.5

7/18/1999 4:30:40 25.48 445 71.9 5.9 8.5

7/18/1999 5:00:40 25.41 447 68.9 5.7 8.4

7/18/1999 5:30:40 25.33 448 65.6 5.4 8.4

7/18/1999 6:00:40 25.22 448 63.2 5.2 8.4

7/18/1999 6:30:40 25.07 449 60.9 5.0 8.3

7/18/1999 7:00:40 24.98 449 60.1 5.0 8.3

7/18/1999 7:30:40 24.9 453 61.4 5.1 8.3

7/18/1999 8:00:40 24.87 452 63.9 5.3 8.3

7/18/1999 8:30:40 24.89 451 66.2 5.5 8.3

7/18/1999 9:00:40 24.94 453 69.3 5.7 8.3

7/18/1999 9:30:40 24.99 452 73.3 6.1 8.3

7/18/1999 10:00:40 25.04 454 79.2 6.5 8.3

7/18/1999 10:30:40 25.22 454 87.1 7.2 8.4

7/18/1999 11:00:40 25.37 452 94.1 7.7 8.4

7/18/1999 11:30:40 25.6 458 100.5 8.2 8.4

7/18/1999 12:00:40 25.91 456 107.5 8.7 8.5

7/18/1999 12:30:40 26.07 455 113.4 9.2 8.5

7/18/1999 13:00:40 26.41 456 120.8 9.7 8.6

7/18/1999 13:30:40 26.59 455 126.7 10.2 8.6

7/18/1999 14:00:40 26.52 456 125.8 10.1 8.6

7/18/1999 14:30:40 26.61 451 133.1 10.7 8.6

7/18/1999 15:00:40 26.49 454 130.2 10.5 8.6

7/18/1999 15:30:40 26.55 453 132.1 10.6 8.6

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 63

7/18/1999 16:00:40 26.59 452 135.9 10.9 8.6

7/18/1999 16:30:40 26.66 450 142.5 11.4 8.7

7/18/1999 17:00:40 26.89 447 152.9 12.2 8.7

7/18/1999 17:30:40 26.96 447 156.2 12.4 8.7

7/18/1999 18:00:40 26.98 445 156.2 12.4 8.8

7/18/1999 18:30:40 26.96 441 155.5 12.4 8.8

7/18/1999 19:00:40 26.91 443 152.5 12.2 8.8

7/18/1999 19:30:40 26.87 445 148.1 11.8 8.8

7/18/1999 20:00:40 26.83 444 145 11.6 8.8

7/18/1999 20:30:40 26.75 445 141.6 11.3 8.8

7/18/1999 21:00:40 26.63 444 136.6 11.0 8.7

7/18/1999 21:30:40 26.53 451 132.2 10.6 8.7

7/18/1999 22:00:40 26.44 446 128.5 10.3 8.7

7/18/1999 22:30:40 26.37 445 125.1 10.1 8.7

7/18/1999 23:00:40 26.29 444 121.5 9.8 8.7

7/18/1999 23:30:40 26.25 445 117.8 9.5 8.7

7/19/1999 0:00:40 26.19 446 113.8 9.2 8.7

7/19/1999 0:30:40 26.08 448 108.6 8.8 8.7

7/19/1999 1:00:40 25.94 451 104.1 8.5 8.7

7/19/1999 1:30:40 25.82 453 99 8.1 8.6

7/19/1999 2:00:40 25.73 453 95.3 7.8 8.6

7/19/1999 2:30:40 25.61 454 91.5 7.5 8.6

7/19/1999 3:00:40 25.54 453 87.8 7.2 8.6

7/19/1999 3:30:40 25.48 454 83.7 6.9 8.6

7/19/1999 4:00:40 25.42 454 79 6.5 8.5

7/19/1999 4:30:40 25.34 454 76 6.2 8.5

7/19/1999 5:00:40 25.24 458 72 5.9 8.5

7/19/1999 5:30:40 25.07 457 68.7 5.7 8.4

7/19/1999 6:00:40 24.95 459 65.9 5.4 8.4

7/19/1999 6:30:40 24.85 460 63.6 5.3 8.3

7/19/1999 7:00:40 24.8 461 62.2 5.2 8.3

7/19/1999 7:30:40 24.77 458 62.5 5.2 8.3

7/19/1999 8:00:40 24.73 458 63.3 5.3 8.3

7/19/1999 8:30:40 24.72 459 65.8 5.5 8.3

7/19/1999 9:00:40 24.65 459 68 5.7 8.3

7/19/1999 9:30:40 24.68 459 71.6 5.9 8.3

7/19/1999 10:00:40 24.8 458 77.7 6.4 8.3

7/19/1999 10:30:40 25.03 457 85.3 7.0 8.4

7/19/1999 11:00:40 25.31 455 93.2 7.7 8.4

7/19/1999 11:30:40 25.65 454 101 8.2 8.5

7/19/1999 12:00:40 25.9 453 108.3 8.8 8.5

7/19/1999 12:30:40 25.91 454 109.1 8.9 8.5

7/19/1999 13:00:40 26.04 452 114.7 9.3 8.5

7/19/1999 13:30:40 26.24 463 132 10.7 8.6

7/19/1999 14:00:40 26.41 463 141.9 11.4 8.7

7/19/1999 14:30:40 26.46 462 142.1 11.4 8.7

7/19/1999 15:00:40 26.81 460 159.5 12.7 8.8

7/19/1999 15:30:40 26.79 460 152.1 12.2 8.7

7/19/1999 16:00:40 26.78 460 148.8 11.9 8.7

7/19/1999 16:30:40 27.01 457 159.8 12.7 8.8

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
64 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/19/1999 17:00:40 27.11 456 162.9 12.9 8.8

7/19/1999 17:30:40 27.09 456 162.9 12.9 8.8

7/19/1999 18:00:40 27.05 454 160.6 12.8 8.8

7/19/1999 18:30:40 27.1 453 163.2 13.0 8.8

7/19/1999 19:00:40 27.13 452 161.6 12.8 8.8

7/19/1999 19:30:40 27.05 452 154.3 12.3 8.8

7/19/1999 20:00:40 27.01 452 148.9 11.9 8.8

7/19/1999 20:30:40 26.94 453 144.3 11.5 8.7

7/19/1999 21:00:40 26.83 454 137.6 11.0 8.7

7/19/1999 21:30:40 26.76 453 134.3 10.7 8.7

7/19/1999 22:00:40 26.68 453 129.3 10.4 8.7

7/19/1999 22:30:40 26.61 453 127 10.2 8.7

7/19/1999 23:00:40 26.57 454 122 9.8 8.7

7/19/1999 23:30:40 26.53 454 117.6 9.4 8.7

7/20/1999 0:00:40 26.46 455 113.2 9.1 8.7

7/20/1999 0:30:40 26.34 456 108.5 8.7 8.7

7/20/1999 1:00:40 26.22 458 104.1 8.4 8.6

7/20/1999 1:30:40 26.12 459 99 8.0 8.6

7/20/1999 2:00:40 26.03 460 94.8 7.7 8.6

7/20/1999 2:30:40 25.95 461 90.4 7.3 8.6

7/20/1999 3:00:40 25.89 461 85.2 6.9 8.5

7/20/1999 3:30:40 25.82 462 81.6 6.6 8.5

7/20/1999 4:00:40 25.74 463 77.1 6.3 8.5

7/20/1999 4:30:40 25.63 465 73.9 6.0 8.4

7/20/1999 5:00:40 25.49 466 70.3 5.8 8.4

7/20/1999 5:30:40 25.39 467 67 5.5 8.4

7/20/1999 6:00:40 25.34 468 63.7 5.2 8.3

7/20/1999 6:30:40 25.28 468 61.3 5.0 8.3

7/20/1999 7:00:40 25.23 468 60.4 5.0 8.3

7/20/1999 7:30:40 25.18 468 59.4 4.9 8.3

7/20/1999 8:00:40 25.09 470 57.6 4.8b 8.2

7/20/1999 8:30:40 25.01 470 60.5 5.0 8.2

7/20/1999 9:00:40 25.01 470 67.1 5.5 8.3

7/20/1999 9:30:40 25.03 470 71.5 5.9 8.3

7/20/1999 10:00:40 25.12 468 78.3 6.5 8.4

7/20/1999 10:30:40 25.32 468 85 7.0 8.4

7/20/1999 11:00:40 25.56 467 95.4 7.8 8.5

7/20/1999 11:30:40 25.56 467 96.6 7.9 8.4

7/20/1999 12:00:40 25.68 467 102.8 8.4 8.5

7/20/1999 12:30:40 25.54 467 95.9 7.8 8.5

7/20/1999 13:00:40 25.75 466 112 9.1 8.6

7/20/1999 13:30:40 25.85 465 119.9 9.7 8.6

7/20/1999 14:00:40 25.96 465 125.7 10.2 8.6

7/20/1999 14:30:40 25.97 464 127.8 10.4 8.6

7/20/1999 15:00:40 26.16 463 138.9 11.2 8.7

Site 37

7/21/1999 10:42:03 26.8 430 72.9 5.8 8.6

7/21/1999 11:00:40 26.93 431 76.1 6.1 8.6

7/21/1999 11:30:40 27.14 431 80.2 6.4 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 65

7/21/1999 12:00:40 27.43 430 86.5 6.8 8.7

7/21/1999 12:30:40 27.72 429 92.7 7.3 8.7

7/21/1999 13:00:40 27.93 428 97.6 7.6 8.7

7/21/1999 13:30:40 28.09 427 102.3 8.0 8.7

7/21/1999 14:00:40 28.3 426 108.1 8.4 8.8

7/21/1999 14:30:40 28.54 425 114.3 8.9 8.8

7/21/1999 15:00:40 28.73 424 118.4 9.1 8.8

7/21/1999 15:30:40 28.8 424 119.8 9.2 8.8

7/21/1999 16:00:40 28.81 422 120.8 9.3 8.8

7/21/1999 16:30:40 28.85 422 121.7 9.4 8.8

7/21/1999 17:00:40 28.81 420 121.1 9.3 8.8

7/21/1999 17:30:40 28.7 413 117.8 9.1 8.9

7/21/1999 18:00:40 28.64 411 116.3 9.0 8.9

7/21/1999 18:30:40 28.64 413 115.7 8.9 8.9

7/21/1999 19:00:40 28.59 413 112.1 8.7 8.8

7/21/1999 19:30:40 28.52 413 108.7 8.4 8.8

7/21/1999 20:00:40 28.34 409 103.6 8.1 8.8

7/21/1999 20:30:40 28.1 408 97.3 7.6 8.8

7/21/1999 21:00:40 27.85 407 91.9 7.2 8.8

7/21/1999 21:30:40 27.6 406 87.1 6.9 8.8

7/21/1999 22:00:40 27.36 405 83.1 6.6 8.7

7/21/1999 22:30:40 27.24 409 80.3 6.4 8.7

7/21/1999 23:00:40 27.2 414 78.8 6.3 8.7

7/21/1999 23:30:40 27.15 417 77.6 6.2 8.7

7/22/1999 0:00:40 27.07 420 75.8 6.0 8.7

7/22/1999 0:30:40 26.97 422 73.3 5.8 8.7

7/22/1999 1:00:40 26.87 424 70.3 5.6 8.7

7/22/1999 1:30:40 26.79 425 68.4 5.5 8.7

7/22/1999 2:00:40 26.73 425 67.3 5.4 8.6

7/22/1999 2:30:40 26.68 426 66.8 5.4 8.6

7/22/1999 3:00:40 26.64 426 66.4 5.3 8.6

7/22/1999 3:30:40 26.61 426 66.3 5.3 8.6

7/22/1999 4:00:40 26.58 427 66.2 5.3 8.6

7/22/1999 4:30:40 26.56 427 65.8 5.3 8.6

7/22/1999 5:00:40 26.53 428 65.9 5.3 8.6

7/22/1999 5:30:40 26.5 428 66.1 5.3 8.6

7/22/1999 6:00:40 26.48 428 66 5.3 8.6

7/22/1999 6:30:40 26.46 428 66.5 5.4 8.6

7/22/1999 7:00:40 26.45 429 66.6 5.4 8.6

7/22/1999 7:30:40 26.45 429 66.9 5.4 8.6

7/22/1999 8:00:40 26.46 429 67.5 5.4 8.6

7/22/1999 8:30:40 26.48 429 68.1 5.5 8.6

7/22/1999 9:00:40 26.53 429 69.6 5.6 8.6

7/22/1999 9:30:40 26.66 429 72 5.8 8.6

7/22/1999 10:00:40 26.91 429 75.7 6.0 8.6

7/22/1999 10:30:40 27.18 428 79.8 6.3 8.6

7/22/1999 11:00:40 27.45 427 85.5 6.8 8.6

7/22/1999 11:30:40 27.73 427 91.8 7.2 8.7

7/22/1999 12:00:40 28.17 425 99.6 7.8 8.7

7/22/1999 12:30:40 28.54 424 106.1 8.2 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
66 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/22/1999 13:00:40 28.65 423 110 8.5 8.8

7/22/1999 13:30:40 28.74 423 112 8.6 8.8

7/22/1999 14:00:40 28.84 423 113.5 8.8 8.8

7/22/1999 14:30:40 29.03 421 116 8.9 8.8

7/22/1999 15:00:40 29.13 422 114.4 8.8 8.8

7/22/1999 15:30:40 29.28 422 113.7 8.7 8.8

7/22/1999 16:00:40 29.21 422 112.9 8.6 8.8

7/22/1999 16:30:40 29.18 422 110.1 8.4 8.8

7/22/1999 17:00:40 29.2 422 109.5 8.4 8.8

7/22/1999 17:30:40 29.22 422 108.7 8.3 8.8

7/22/1999 18:00:40 29.25 422 109.6 8.4 8.8

7/22/1999 18:30:40 29.27 422 111.6 8.5 8.8

7/22/1999 19:00:40 29.23 422 112.5 8.6 8.8

7/22/1999 19:30:40 29.1 422 111.6 8.6 8.8

7/22/1999 20:00:40 28.95 422 110 8.5 8.8

7/22/1999 20:30:40 28.7 422 107.3 8.3 8.8

7/22/1999 21:00:40 28.43 422 103.7 8.1 8.8

7/22/1999 21:30:40 28.15 423 99 7.7 8.8

7/22/1999 22:00:40 27.94 425 94.2 7.4 8.8

7/22/1999 22:30:40 27.75 425 89.8 7.1 8.7

7/22/1999 23:00:40 27.59 426 85.3 6.7 8.7

7/22/1999 23:30:40 27.45 427 79.7 6.3 8.7

7/23/1999 0:00:40 27.38 428 74.7 5.9 8.6

7/23/1999 0:30:40 27.39 429 71 5.6 8.6

7/23/1999 1:00:40 27.43 429 69.8 5.5 8.6

7/23/1999 1:30:40 27.48 429 67.9 5.4 8.6

7/23/1999 2:00:40 27.51 430 66.7 5.3 8.6

7/23/1999 2:30:40 27.5 431 66.2 5.2 8.6

7/23/1999 3:00:40 27.46 431 65.9 5.2 8.6

7/23/1999 3:30:40 27.4 432 65.9 5.2 8.5

7/23/1999 4:00:40 27.35 432 65.8 5.2 8.5

7/23/1999 4:30:40 27.29 432 65.8 5.2 8.5

7/23/1999 5:00:40 27.22 432 65.7 5.2 8.5

7/23/1999 5:30:40 27.15 433 65.3 5.2 8.5

7/23/1999 6:00:40 27.08 433 65.3 5.2 8.5

7/23/1999 6:30:40 27.01 433 65.2 5.2 8.5

7/23/1999 7:00:40 26.96 433 65.5 5.2 8.5

7/23/1999 7:30:40 26.94 434 65.8 5.2 8.5

7/23/1999 8:00:40 26.93 434 66.1 5.3 8.5

7/23/1999 8:30:40 26.96 434 67.3 5.4 8.5

7/23/1999 9:00:40 27.03 434 67.7 5.4 8.5

7/23/1999 9:30:40 27.18 433 70.5 5.6 8.5

7/23/1999 10:00:40 27.39 433 75.5 6.0 8.5

7/23/1999 10:30:40 27.59 433 77.5 6.1 8.5

7/23/1999 11:00:40 27.83 432 82 6.4 8.5

7/23/1999 11:30:40 28.17 432 87.3 6.8 8.5

7/23/1999 12:00:40 28.49 431 91.7 7.1 8.6

7/23/1999 12:30:40 28.94 431 98.1 7.6 8.6

7/23/1999 13:00:40 29.33 430 103.8 7.9 8.6

7/23/1999 13:30:40 29.72 429 109.9 8.3 8.6

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 67

7/23/1999 14:00:40 30.08 429 115 8.7 8.7

7/23/1999 14:30:40 30.22 428 117.4 8.8 8.7

7/23/1999 15:00:40 30.48 428 121.1 9.1 8.7

7/23/1999 15:30:40 30.58 427 123.2 9.2 8.7

7/23/1999 16:00:40 30.92 427 127.6 9.5 8.7

7/23/1999 16:30:40 31.03 427 129 9.6 8.7

7/23/1999 17:00:40 31.07 426 129.1 9.6 8.8

7/23/1999 17:30:40 31.12 426 130.9 9.7 8.8

7/23/1999 18:00:40 31.07 426 130.2 9.7 8.8

7/23/1999 18:30:40 30.95 426 128.2 9.5 8.8

7/23/1999 19:00:40 30.84 426 126.5 9.4 8.8

7/23/1999 19:30:40 30.72 426 123.5 9.2 8.8

7/23/1999 20:00:40 30.55 426 121.4 9.1 8.8

7/23/1999 20:30:40 30.33 426 118.7 8.9 8.8

7/23/1999 21:00:40 30.04 426 115.5 8.7 8.8

7/23/1999 21:30:40 29.82 426 111.3 8.4 8.7

7/23/1999 22:00:40 29.64 427 105.2 8.0 8.7

7/23/1999 22:30:40 29.44 427 98.4 7.5 8.7

7/23/1999 23:00:40 29.26 428 92.9 7.1 8.7

7/23/1999 23:30:40 29.08 429 85.8 6.6 8.7

7/24/1999 0:00:40 28.91 430 82.2 6.3 8.6

7/24/1999 0:30:40 28.73 431 77.3 6.0 8.6

7/24/1999 1:00:40 28.56 432 72.3 5.6 8.6

7/24/1999 1:30:40 28.38 432 68.9 5.4 8.6

7/24/1999 2:00:40 28.22 433 64.2 5.0 8.5

7/24/1999 2:30:40 28.05 434 63.2 4.9 8.5

7/24/1999 3:00:40 27.88 434 62.1 4.9 8.5

7/24/1999 3:30:40 27.7 435 61.3 4.8 8.5

7/24/1999 4:00:40 27.54 435 61.2 4.8 8.4

7/24/1999 4:30:40 27.4 435 61.6 4.9 8.4

7/24/1999 5:00:40 27.29 435 61.5 4.9 8.4

7/24/1999 5:30:40 27.2 435 61.3 4.9 8.4

7/24/1999 6:00:40 27.12 435 61.2 4.9 8.4

7/24/1999 6:30:40 27.07 434 60.7 4.8 8.4

7/24/1999 7:00:40 27.01 435 61.1 4.9 8.4

7/24/1999 7:30:40 26.99 435 61.6 4.9 8.4

7/24/1999 8:00:40 26.99 434 62.6 5.0 8.4

7/24/1999 8:30:40 27.01 435 63.8 5.1 8.4

7/24/1999 9:00:40 27.08 434 65.7 5.2 8.4

7/24/1999 9:30:40 27.21 434 67.7 5.4 8.4

7/24/1999 10:00:40 27.37 434 70.9 5.6 8.4

7/24/1999 10:30:40 27.52 434 72 5.7 8.4

7/24/1999 11:00:40 27.73 433 76.2 6.0 8.4

7/24/1999 11:30:40 27.85 433 78.7 6.2 8.4

7/24/1999 12:00:40 27.97 432 82.9 6.5 8.5

7/24/1999 12:30:40 28.08 432 87.2 6.8 8.5

7/24/1999 13:00:40 28.19 431 91.2 7.1 8.5

7/24/1999 13:30:40 28.48 430 98.9 7.7 8.5

7/24/1999 14:00:40 28.96 428 106.8 8.2 8.6

7/24/1999 14:30:40 29.19 427 111.1 8.5 8.6

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
68 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/24/1999 15:00:40 29.35 427 113.3 8.7 8.6

7/24/1999 15:30:40 29.48 427 114.8 8.8 8.7

7/24/1999 16:00:40 29.61 426 116.5 8.9 8.7

7/24/1999 16:30:40 29.7 426 117.7 8.9 8.7

7/24/1999 17:00:40 29.76 426 118.8 9.0 8.7

7/24/1999 17:30:40 29.78 425 121.1 9.2 8.7

7/24/1999 18:00:40 29.83 425 122.5 9.3 8.7

7/24/1999 18:30:40 29.86 425 123.1 9.3 8.7

7/24/1999 19:00:40 29.85 424 122.9 9.3 8.7

7/24/1999 19:30:40 29.76 425 120.1 9.1 8.7

7/24/1999 20:00:40 29.65 425 116.9 8.9 8.7

7/24/1999 20:30:40 29.52 425 112.2 8.5 8.7

7/24/1999 21:00:40 29.37 425 109 8.3 8.7

7/24/1999 21:30:40 29.21 425 104.4 8.0 8.7

7/24/1999 22:00:40 28.97 426 98.6 7.6 8.7

7/24/1999 22:30:40 28.71 427 92.7 7.2 8.7

7/24/1999 23:00:40 28.43 428 86.2 6.7 8.6

7/24/1999 23:30:40 28.21 429 81.3 6.3 8.6

7/25/1999 0:00:40 28.02 430 76.4 6.0 8.6

7/25/1999 0:30:40 27.9 431 73.2 5.7 8.5

7/25/1999 1:00:40 27.79 431 70.8 5.6 8.5

7/25/1999 1:30:40 27.7 432 67.8 5.3 8.5

7/25/1999 2:00:40 27.61 432 65.5 5.2 8.5

7/25/1999 2:30:40 27.55 432 63.7 5.0 8.5

7/25/1999 3:00:40 27.48 433 62.5 4.9 8.4

7/25/1999 3:30:40 27.41 433 61.9 4.9 8.4

7/25/1999 4:00:40 27.36 434 61.3 4.9 8.4

7/25/1999 4:30:40 27.3 434 61 4.8 8.4

7/25/1999 5:00:40 27.24 434 61.2 4.9 8.4

7/25/1999 5:30:40 27.18 434 61.1 4.9 8.4

7/25/1999 6:00:40 27.12 434 61.1 4.9 8.4

7/25/1999 6:30:40 27.06 434 61.7 4.9 8.4

7/25/1999 7:00:40 27 434 62 4.9 8.4

7/25/1999 7:30:40 26.96 434 62.4 5.0 8.4

7/25/1999 8:00:40 26.95 434 62.5 5.0 8.4

7/25/1999 8:30:40 26.99 434 64.4 5.1 8.4

7/25/1999 9:00:40 27.03 434 65 5.2 8.4

7/25/1999 9:30:40 27.18 434 67.2 5.3 8.4

7/25/1999 10:00:40 27.41 434 72.5 5.7 8.4

7/25/1999 10:30:40 27.57 434 74.9 5.9 8.4

7/25/1999 11:00:40 27.77 434 78 6.1 8.4

7/25/1999 11:30:40 28.08 434 82.9 6.5 8.5

7/25/1999 12:00:40 28.38 433 86.8 6.8 8.5

7/25/1999 12:30:40 28.56 433 90.3 7.0 8.5

7/25/1999 13:00:40 28.85 432 96.4 7.4 8.5

7/25/1999 13:30:40 29.11 430 103.5 7.9 8.6

7/25/1999 14:00:40 29.52 430 110.4 8.4 8.6

7/25/1999 14:30:40 29.8 429 115.8 8.8 8.6

7/25/1999 15:00:40 29.77 428 116.7 8.9 8.7

7/25/1999 15:30:40 29.9 428 118.5 9.0 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 69

7/25/1999 16:00:40 30 428 121.4 9.2 8.7

7/25/1999 16:30:40 30.12 427 124.9 9.4 8.7

7/25/1999 17:00:40 30.16 427 125.6 9.5 8.7

7/25/1999 17:30:40 30.14 426 125.5 9.5 8.7

7/25/1999 18:00:40 30.14 426 127.2 9.6 8.7

7/25/1999 18:30:40 30.11 426 127.1 9.6 8.7

7/25/1999 19:00:40 30.12 426 127.1 9.6 8.8

7/25/1999 19:30:40 30.11 425 127 9.6 8.8

7/25/1999 20:00:40 30.12 425 127.4 9.6 8.8

7/25/1999 20:30:40 30.07 425 126.7 9.6 8.8

7/25/1999 21:00:40 29.91 425 124.3 9.4 8.8

7/25/1999 21:30:40 29.68 426 120.1 9.1 8.8

7/25/1999 22:00:40 29.45 426 114.2 8.7 8.8

7/25/1999 22:30:40 29.23 427 108.7 8.3 8.7

7/25/1999 23:00:40 28.99 428 102.7 7.9 8.7

7/25/1999 23:30:40 28.77 429 96.1 7.4 8.7

7/26/1999 0:00:40 28.57 430 90.1 7.0 8.7

7/26/1999 0:30:40 28.38 431 84.2 6.5 8.6

7/26/1999 1:00:40 28.21 433 78.1 6.1 8.6

7/26/1999 1:30:40 28.07 434 72.7 5.7 8.6

7/26/1999 2:00:40 27.94 435 68.2 5.3 8.5

7/26/1999 2:30:40 27.84 436 64.6 5.1 8.5

7/26/1999 3:00:40 27.73 437 62.8 4.9 8.5

7/26/1999 3:30:40 27.61 437 61.6 4.9 8.5

7/26/1999 4:00:40 27.5 438 60.7 4.8 8.5

7/26/1999 4:30:40 27.38 438 60.5 4.8 8.4

7/26/1999 5:00:40 27.27 440 60.3 4.8 8.4

7/26/1999 5:30:40 27.17 438 60.1 4.8 8.4

7/26/1999 6:00:40 27.07 438 60 4.8 8.4

7/26/1999 6:30:40 26.98 438 59.7 4.8 8.4

7/26/1999 7:00:40 26.91 438 59.4 4.7b 8.4

7/26/1999 7:30:40 26.84 438 60.7 4.8 8.4

7/26/1999 8:00:40 26.79 437 61.5 4.9 8.4

7/26/1999 8:30:40 26.79 437 62.4 5.0 8.4

7/26/1999 9:00:40 26.79 437 62.8 5.0 8.4

7/26/1999 9:30:40 26.83 437 63.4 5.1 8.4

7/26/1999 10:00:40 26.85 437 64.5 5.2 8.4

7/26/1999 10:30:40 26.88 437 66.8 5.3 8.4

7/26/1999 11:00:40 27.07 437 70.5 5.6 8.4

7/26/1999 11:30:40 27.29 437 74.8 5.9 8.4

7/26/1999 12:00:40 27.57 436 79.1 6.2 8.4

7/26/1999 12:30:40 27.81 436 83.2 6.5 8.5

7/26/1999 13:00:40 28.07 435 88.1 6.9 8.5

7/26/1999 13:30:40 28.35 434 94.4 7.3 8.5

7/26/1999 14:00:40 28.52 433 99.3 7.7 8.6

7/26/1999 14:30:40 28.73 432 105.1 8.1 8.6

7/26/1999 15:00:40 29 431 109.3 8.4 8.6

7/26/1999 15:30:40 29.24 430 115.3 8.8 8.6

7/26/1999 16:00:40 29.5 429 119.1 9.1 8.7

7/26/1999 16:30:40 29.74 428 124 9.4 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
70 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/26/1999 17:00:40 29.92 427 127.5 9.6 8.7

7/26/1999 17:30:40 30.04 426 130.2 9.8 8.8

7/26/1999 18:00:40 30.14 426 132.4 10.0 8.8

7/26/1999 18:30:40 30.12 425 132.9 10.0a 8.8

7/26/1999 19:00:40 30.09 425 132.5 10.0 8.8

7/26/1999 19:30:40 30.02 424 131.5 9.9 8.8

7/26/1999 20:00:40 29.9 424 129.9 9.8 8.8

7/26/1999 20:30:40 29.72 424 128 9.7 8.8

7/26/1999 21:00:40 29.51 423 125.6 9.6 8.8

7/26/1999 21:30:40 29.34 423 123 9.4 8.8

7/26/1999 22:00:40 29.13 424 118.8 9.1 8.8

7/26/1999 22:30:40 28.9 425 113.7 8.8 8.8

7/26/1999 23:00:40 28.63 425 107.8 8.3 8.8

7/26/1999 23:30:40 28.37 426 102.1 7.9 8.8

7/27/1999 0:00:40 28.11 427 96.2 7.5 8.8

7/27/1999 0:30:40 27.88 428 90.2 7.1 8.7

7/27/1999 1:00:40 27.65 429 84.1 6.6 8.7

7/27/1999 1:30:40 27.46 429 78.8 6.2 8.7

7/27/1999 2:00:40 27.27 430 73.1 5.8 8.7

7/27/1999 2:30:40 27.1 432 68.4 5.4 8.6

7/27/1999 3:00:40 26.97 433 65.2 5.2 8.6

7/27/1999 3:30:40 26.85 433 62.7 5.0 8.6

7/27/1999 4:00:40 26.77 434 61.3 4.9 8.5

7/27/1999 4:30:40 26.69 434 60.5 4.9 8.5

7/27/1999 5:00:40 26.61 434 60 4.8 8.5

7/27/1999 5:30:40 26.56 434 59.6 4.8 8.5

7/27/1999 6:00:40 26.5 434 59.4 4.8 8.5

7/27/1999 6:30:40 26.45 434 59 4.8 8.5

7/27/1999 7:00:40 26.43 434 59.2 4.8 8.5

7/27/1999 7:30:40 26.4 434 59.2 4.8 8.5

7/27/1999 8:00:40 26.38 435 59.4 4.8 8.5

7/27/1999 8:30:40 26.37 435 59.7 4.8 8.5

7/27/1999 9:00:40 26.39 435 60.4 4.9 8.5

Site 38

7/21/1999 11:30:40 27.11 441 83.4 6.6 8.6

7/21/1999 12:00:40 27.5 439 89.5 7.1 8.7

7/21/1999 12:30:40 27.75 438 94.2 7.4 8.7

7/21/1999 13:00:40 27.95 438 98.4 7.7 8.7

7/21/1999 13:30:40 28 437 100.9 7.9 8.7

7/21/1999 14:00:40 28.17 438 104.8 8.2 8.7

7/21/1999 14:30:40 28.44 434 111.2 8.6 8.8

7/21/1999 15:00:40 28.55 434 113.5 8.8 8.8

7/21/1999 15:30:40 28.51 434 109.2 8.5 8.8

7/21/1999 16:00:40 28.5 435 110.3 8.6 8.8

7/21/1999 16:30:40 28.6 431 112.8 8.7 8.8

7/21/1999 17:00:40 28.31 431 106.7 8.3 8.8

7/21/1999 17:30:40 28.18 428 106.2 8.3 8.8

7/21/1999 18:00:40 28.19 428 107 8.3 8.8

7/21/1999 18:30:40 26.75 502 94.3 7.5 8.5

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 71

7/21/1999 19:00:40 26.96 389 93.4 7.4 8.6

7/21/1999 19:30:40 27.15 349 94.4 7.5 8.7

7/21/1999 20:00:40 27.33 373 94.4 7.5 8.7

7/21/1999 20:30:40 27.43 386 91.8 7.3 8.7

7/21/1999 21:00:40 27.39 389 88 7.0 8.7

7/21/1999 21:30:40 27.3 391 84.1 6.7 8.7

7/21/1999 22:00:40 27.14 392 80.6 6.4 8.7

7/21/1999 22:30:40 27.01 396 78.3 6.2 8.7

7/21/1999 23:00:40 26.95 399 76 6.1 8.7

7/21/1999 23:30:40 26.93 404 75.1 6.0 8.7

7/22/1999 0:00:40 26.86 407 73.8 5.9 8.7

7/22/1999 0:30:40 26.8 410 72.1 5.8 8.7

7/22/1999 1:00:40 26.73 412 70.2 5.6 8.6

7/22/1999 1:30:40 26.66 413 68.3 5.5 8.6

7/22/1999 2:00:40 26.6 413 67 5.4 8.6

7/22/1999 2:30:40 26.55 414 66.3 5.3 8.6

7/22/1999 3:00:40 26.51 415 65.9 5.3 8.6

7/22/1999 3:30:40 26.48 415 65.5 5.3 8.6

7/22/1999 4:00:40 26.44 415 65.4 5.3 8.6

7/22/1999 4:30:40 26.41 416 65.2 5.3 8.6

7/22/1999 5:00:40 26.38 416 65.2 5.2 8.6

7/22/1999 5:30:40 26.36 416 65.3 5.3 8.6

7/22/1999 6:00:40 26.32 420 65.3 5.3 8.6

7/22/1999 6:30:40 26.3 417 65.8 5.3 8.6

7/22/1999 7:00:40 26.31 418 66.5 5.4 8.6

7/22/1999 7:30:40 26.29 428 67.2 5.4 8.5

7/22/1999 8:00:40 26.32 424 68.3 5.5 8.6

7/22/1999 8:30:40 26.37 423 69.7 5.6 8.6

7/22/1999 9:00:40 26.46 423 72 5.8 8.6

7/22/1999 9:30:40 26.66 424 74.9 6.0 8.6

7/22/1999 10:00:40 26.95 422 77.8 6.2 8.6

7/22/1999 10:30:40 27.26 420 81.2 6.4 8.6

7/22/1999 11:00:40 27.6 416 86.1 6.8 8.6

7/22/1999 11:30:40 27.86 421 91.6 7.2 8.6

7/22/1999 12:00:40 28.2 420 97.3 7.6 8.7

7/22/1999 12:30:40 28.49 418 102.2 7.9 8.7

7/22/1999 13:00:40 28.64 419 105.8 8.2 8.7

7/22/1999 13:30:40 28.7 417 108 8.3 8.7

7/22/1999 14:00:40 28.78 418 108.9 8.4 8.8

7/22/1999 14:30:40 29.02 415 112.6 8.7 8.8

7/22/1999 15:00:40 29.12 415 112.6 8.6 8.8

7/22/1999 15:30:40 29.24 415 112.4 8.6 8.8

7/22/1999 16:00:40 29.24 415 112 8.6 8.8

7/22/1999 16:30:40 29.17 415 109.4 8.4 8.8

7/22/1999 17:00:40 29.14 415 107.9 8.3 8.8

7/22/1999 17:30:40 29.13 415 106.8 8.2 8.8

7/22/1999 18:00:40 29.14 415 106 8.1 8.8

7/22/1999 18:30:40 29.14 415 106.6 8.2 8.8

7/22/1999 19:00:40 29.12 415 107.2 8.2 8.8

7/22/1999 19:30:40 29.06 416 106.6 8.2 8.8

7/22/1999 20:00:40 28.9 417 103.6 8.0 8.8

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
72 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/22/1999 20:30:40 28.71 418 101.3 7.8 8.8

7/22/1999 21:00:40 28.47 418 98.8 7.7 8.8

7/22/1999 21:30:40 28.22 418 95.2 7.4 8.8

7/22/1999 22:00:40 27.98 420 91.5 7.2 8.7

7/22/1999 22:30:40 27.78 421 87.8 6.9 8.7

7/22/1999 23:00:40 27.6 422 83.7 6.6 8.7

7/22/1999 23:30:40 27.46 423 80 6.3 8.7

7/23/1999 0:00:40 27.34 424 76.1 6.0 8.6

7/23/1999 0:30:40 27.28 424 72.2 5.7 8.6

7/23/1999 1:00:40 27.29 424 70.1 5.6 8.6

7/23/1999 1:30:40 27.31 427 68.4 5.4 8.6

7/23/1999 2:00:40 27.34 424 67 5.3 8.6

7/23/1999 2:30:40 27.33 425 66.4 5.3 8.6

7/23/1999 3:00:40 27.3 425 66.4 5.3 8.5

7/23/1999 3:30:40 27.25 427 66.1 5.2 8.5

7/23/1999 4:00:40 27.2 426 65.9 5.2 8.5

7/23/1999 4:30:40 27.14 427 66 5.2 8.5

7/23/1999 5:00:40 27.07 427 65.9 5.2 8.5

7/23/1999 5:30:40 26.99 428 66.1 5.3 8.5

7/23/1999 6:00:40 26.93 428 65.9 5.3 8.5

7/23/1999 6:30:40 26.87 428 66 5.3 8.5

7/23/1999 7:00:40 26.82 429 67 5.4 8.5

7/23/1999 7:30:40 26.8 430 68 5.4 8.5

7/23/1999 8:00:40 26.8 432 69.1 5.5 8.5

7/23/1999 8:30:40 26.87 432 70.7 5.6 8.5

7/23/1999 9:00:40 26.98 436 73 5.8 8.5

7/23/1999 9:30:40 27.2 435 75.9 6.0 8.5

7/23/1999 10:00:40 27.48 435 79.9 6.3 8.5

7/23/1999 10:30:40 27.74 435 83.3 6.5 8.5

7/23/1999 11:00:40 28.01 435 86.8 6.8 8.5

7/23/1999 11:30:40 28.33 435 91 7.1 8.6

7/23/1999 12:00:40 28.62 436 95 7.4 8.6

7/23/1999 12:30:40 28.99 434 99.8 7.7 8.6

7/23/1999 13:00:40 29.32 434 104.4 8.0 8.6

7/23/1999 13:30:40 29.59 433 107.8 8.2 8.6

7/23/1999 14:00:40 29.87 434 112.1 8.5 8.7

7/23/1999 14:30:40 30.04 434 114.8 8.7 8.7

7/23/1999 15:00:40 30.26 432 117.8 8.9 8.7

7/23/1999 15:30:40 30.46 429 120.4 9.0 8.7

7/23/1999 16:00:40 30.57 431 122.4 9.2 8.7

7/23/1999 16:30:40 30.78 428 124.6 9.3 8.7

7/23/1999 17:00:40 30.8 428 123.8 9.2 8.7

7/23/1999 17:30:40 30.91 426 124.7 9.3 8.8

7/23/1999 18:00:40 30.83 425 123.4 9.2 8.8

7/23/1999 18:30:40 30.76 423 121.6 9.1 8.8

7/23/1999 19:00:40 30.65 422 119.2 8.9 8.7

7/23/1999 19:30:40 30.54 422 116.7 8.7 8.7

7/23/1999 20:00:40 30.39 422 113.8 8.5 8.7

7/23/1999 20:30:40 30.22 422 110.3 8.3 8.7

7/23/1999 21:00:40 30 420 107.8 8.1 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 73

7/23/1999 21:30:40 29.77 420 104 7.9 8.7

7/23/1999 22:00:40 29.55 420 100.4 7.6 8.7

7/23/1999 22:30:40 29.36 422 96 7.3 8.7

7/23/1999 23:00:40 29.18 424 91.4 7.0 8.7

7/23/1999 23:30:40 28.99 426 85.7 6.6 8.6

7/24/1999 0:00:40 28.83 427 81.2 6.3 8.6

7/24/1999 0:30:40 28.66 428 78 6.0 8.6

7/24/1999 1:00:40 28.5 428 74.2 5.8 8.6

7/24/1999 1:30:40 28.33 429 70.8 5.5 8.5

7/24/1999 2:00:40 28.18 429 67.9 5.3 8.5

7/24/1999 2:30:40 28.01 430 65.7 5.1 8.5

7/24/1999 3:00:40 27.85 431 64.1 5.0 8.5

7/24/1999 3:30:40 27.69 430 62.9 5.0 8.4

7/24/1999 4:00:40 27.51 431 62.4 4.9b 8.4

7/24/1999 4:30:40 27.34 431 62.4 4.9 8.4

7/24/1999 5:00:40 27.2 432 62.3 4.9 8.4

7/24/1999 5:30:40 27.09 432 62.3 5.0 8.4

7/24/1999 6:00:40 27 432 62.2 5.0 8.4

7/24/1999 6:30:40 26.92 432 62.3 5.0 8.4

7/24/1999 7:00:40 26.88 431 63.3 5.1 8.4

7/24/1999 7:30:40 26.84 432 63.6 5.1 8.3

7/24/1999 8:00:40 26.85 434 65.8 5.3 8.4

7/24/1999 8:30:40 26.88 434 68.1 5.4 8.4

7/24/1999 9:00:40 27.04 436 71.8 5.7 8.4

7/24/1999 9:30:40 27.15 437 73.7 5.9 8.4

7/24/1999 10:00:40 27.36 437 77.1 6.1 8.4

7/24/1999 10:30:40 27.5 438 79.2 6.3 8.4

7/24/1999 11:00:40 27.72 438 81.7 6.4 8.4

7/24/1999 11:30:40 27.74 440 80.3 6.3 8.4

7/24/1999 12:00:40 27.79 439 83.8 6.6 8.4

7/24/1999 12:30:40 28.03 437 91.4 7.1 8.5

7/24/1999 13:00:40 28.03 436 91.5 7.2 8.5

7/24/1999 13:30:40 28.31 438 98.9 7.7 8.5

7/24/1999 14:00:40 28.79 433 106.4 8.2 8.6

7/24/1999 14:30:40 29.11 433 110.9 8.5 8.6

7/24/1999 15:00:40 29.27 433 113.7 8.7 8.6

7/24/1999 15:30:40 29.39 432 115 8.8 8.7

7/24/1999 16:00:40 29.41 431 113.7 8.7 8.7

7/24/1999 16:30:40 29.49 430 113.2 8.6 8.7

7/24/1999 17:00:40 29.5 430 112.7 8.6 8.7

7/24/1999 17:30:40 29.5 431 114.1 8.7 8.7

7/24/1999 18:00:40 29.5 431 112.9 8.6 8.7

7/24/1999 18:30:40 29.54 431 114.1 8.7 8.7

7/24/1999 19:00:40 29.54 430 116.1 8.8 8.7

7/24/1999 19:30:40 29.42 432 112.4 8.6 8.7

7/24/1999 20:00:40 29.33 431 110 8.4 8.7

7/24/1999 20:30:40 29.21 431 106.1 8.1 8.7

7/24/1999 21:00:40 29.09 430 103.1 7.9 8.7

7/24/1999 21:30:40 28.97 431 100.3 7.7 8.7

7/24/1999 22:00:40 28.8 433 96.1 7.4 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
74 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/24/1999 22:30:40 28.59 433 91.5 7.1 8.6

7/24/1999 23:00:40 28.35 434 86.6 6.7 8.6

7/24/1999 23:30:40 28.13 433 82 6.4 8.6

7/25/1999 0:00:40 27.94 433 78.1 6.1 8.5

7/25/1999 0:30:40 27.77 434 74.9 5.9 8.5

7/25/1999 1:00:40 27.63 435 72.3 5.7 8.5

7/25/1999 1:30:40 27.54 433 70.1 5.5 8.5

7/25/1999 2:00:40 27.43 433 67.9 5.4 8.5

7/25/1999 2:30:40 27.35 432 66 5.2 8.5

7/25/1999 3:00:40 27.27 433 64.9 5.1 8.4

7/25/1999 3:30:40 27.21 432 63.9 5.1 8.4

7/25/1999 4:00:40 27.13 432 63.4 5.0 8.4

7/25/1999 4:30:40 27.08 430 63 5.0 8.4

7/25/1999 5:00:40 27.02 431 62.8 5.0 8.4

7/25/1999 5:30:40 26.95 432 62.8 5.0 8.4

7/25/1999 6:00:40 26.89 432 63 5.0 8.4

7/25/1999 6:30:40 26.84 431 63.4 5.1 8.4

7/25/1999 7:00:40 26.79 432 64.4 5.2 8.4

7/25/1999 7:30:40 26.75 432 65.3 5.2 8.4

7/25/1999 8:00:40 26.75 432 66.6 5.3 8.4

7/25/1999 8:30:40 26.82 435 68.9 5.5 8.4

7/25/1999 9:00:40 26.93 437 71.6 5.7 8.4

7/25/1999 9:30:40 27.12 437 74.9 6.0 8.4

7/25/1999 10:00:40 27.42 439 79.5 6.3 8.4

7/25/1999 10:30:40 27.65 440 82.5 6.5 8.4

7/25/1999 11:00:40 27.86 438 85.4 6.7 8.5

7/25/1999 11:30:40 28.18 440 89.5 7.0 8.5

7/25/1999 12:00:40 28.31 439 90.9 7.1 8.5

7/25/1999 12:30:40 28.45 439 93.8 7.3 8.5

7/25/1999 13:00:40 28.7 438 98.1 7.6 8.5

7/25/1999 13:30:40 28.97 436 103 7.9 8.6

7/25/1999 14:00:40 29.29 434 109.2 8.4 8.6

7/25/1999 14:30:40 29.53 438 113.9 8.7 8.6

7/25/1999 15:00:40 29.57 434 115.7 8.8 8.6

7/25/1999 15:30:40 29.71 433 118.1 9.0 8.7

7/25/1999 16:00:40 29.81 433 119.5 9.1 8.7

7/25/1999 16:30:40 29.86 431 120.6 9.1 8.7

7/25/1999 17:00:40 29.89 429 121.6 9.2 8.7

7/25/1999 17:30:40 29.81 429 121.1 9.2 8.7

7/25/1999 18:00:40 29.77 424 120.4 9.1 8.7

7/25/1999 18:30:40 29.73 431 119.5 9.1 8.7

7/25/1999 19:00:40 29.73 431 118.4 9.0 8.7

7/25/1999 19:30:40 29.71 430 117 8.9 8.7

7/25/1999 20:00:40 29.72 431 116.3 8.8 8.7

7/25/1999 20:30:40 29.68 431 115.5 8.8 8.7

7/25/1999 21:00:40 29.57 434 114 8.7 8.7

7/25/1999 21:30:40 29.43 431 111.5 8.5 8.7

7/25/1999 22:00:40 29.26 430 107.8 8.2 8.7

7/25/1999 22:30:40 29.02 432 103.2 7.9 8.7

7/25/1999 23:00:40 28.83 431 99.1 7.6 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 75

7/25/1999 23:30:40 28.57 434 94.4 7.3 8.7

7/26/1999 0:00:40 28.41 431 89.3 6.9 8.6

7/26/1999 0:30:40 28.21 433 85.1 6.6 8.6

7/26/1999 1:00:40 28.05 432 80.7 6.3 8.6

7/26/1999 1:30:40 27.9 431 76 6.0 8.6

7/26/1999 2:00:40 27.75 432 72.4 5.7 8.5

7/26/1999 2:30:40 27.62 433 68.5 5.4 8.5

7/26/1999 3:00:40 27.49 433 66.1 5.2 8.5

7/26/1999 3:30:40 27.37 434 64.3 5.1 8.4

7/26/1999 4:00:40 27.27 433 63 5.0 8.4

7/26/1999 4:30:40 27.15 434 62.5 5.0 8.4

7/26/1999 5:00:40 27.02 434 62.3 5.0 8.4

7/26/1999 5:30:40 26.92 435 62.3 5.0 8.4

7/26/1999 6:00:40 26.81 435 62.4 5.0 8.4

7/26/1999 6:30:40 26.73 436 62.1 5.0 8.4

7/26/1999 7:00:40 26.65 436 62.9 5.0 8.4

7/26/1999 7:30:40 26.58 437 64.4 5.2 8.4

7/26/1999 8:00:40 26.55 439 66.2 5.3 8.4

7/26/1999 8:30:40 26.54 440 67.7 5.4 8.4

7/26/1999 9:00:40 26.56 442 68.5 5.5 8.4

7/26/1999 9:30:40 26.65 440 70.7 5.7 8.4

7/26/1999 10:00:40 26.67 442 71.3 5.7 8.4

7/26/1999 10:30:40 26.74 442 73.7 5.9 8.4

7/26/1999 11:00:40 27.04 443 79.1 6.3 8.4

7/26/1999 11:30:40 27.33 441 82.7 6.5 8.5

7/26/1999 12:00:40 27.69 440 87.5 6.9 8.5

7/26/1999 12:30:40 27.87 439 90.6 7.1 8.5

7/26/1999 13:00:40 28.09 441 94.6 7.4 8.5

7/26/1999 13:30:40 28.31 440 98.1 7.6 8.5

7/26/1999 14:00:40 28.29 441 100.7 7.8 8.5

7/26/1999 14:30:40 28.57 440 105.9 8.2 8.6

7/26/1999 15:00:40 28.69 438 108.8 8.4 8.6

7/26/1999 15:30:40 28.95 438 113.6 8.7 8.6

7/26/1999 16:00:40 29.05 438 115.3 8.9 8.6

7/26/1999 16:30:40 29.32 433 119.6 9.1 8.7

7/26/1999 17:00:40 29.4 436 121.1 9.2 8.7

7/26/1999 17:30:40 29.57 434 122.8 9.3 8.7

7/26/1999 18:00:40 29.66 433 124 9.4a 8.7

7/26/1999 18:30:40 29.68 432 123.4 9.4 8.8

7/26/1999 19:00:40 29.64 432 122.9 9.3 8.8

7/26/1999 19:30:40 29.62 431 121.4 9.2 8.8

7/26/1999 20:00:40 29.56 431 119.2 9.1 8.8

7/26/1999 20:30:40 29.39 433 116.6 8.9 8.8

7/26/1999 21:00:40 29.22 432 114.2 8.7 8.8

7/26/1999 21:30:40 29.04 431 112.6 8.6 8.8

7/26/1999 22:00:40 28.86 432 109.9 8.5 8.8

7/26/1999 22:30:40 28.66 431 106.4 8.2 8.7

7/26/1999 23:00:40 28.47 429 102.3 7.9 8.7

7/26/1999 23:30:40 28.21 433 98.1 7.6 8.7

7/27/1999 0:00:40 27.97 433 93.7 7.3 8.7

7/27/1999 0:30:40 27.74 432 89.4 7.0 8.7

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
76 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/27/1999 1:00:40 27.53 431 85 6.7 8.7

7/27/1999 1:30:40 27.33 431 80.8 6.4 8.6

7/27/1999 2:00:40 27.16 430 76.6 6.1 8.6

7/27/1999 2:30:40 26.99 430 72.4 5.8 8.6

7/27/1999 3:00:40 26.84 430 69.2 5.5 8.6

7/27/1999 3:30:40 26.69 430 66.6 5.3 8.5

7/27/1999 4:00:40 26.57 430 64.6 5.2 8.5

7/27/1999 4:30:40 26.46 430 63.6 5.1 8.5

7/27/1999 5:00:40 26.37 430 62.9 5.1 8.5

7/27/1999 5:30:40 26.31 430 62.4 5.0 8.5

7/27/1999 6:00:40 26.24 432 62.2 5.0 8.5

7/27/1999 6:30:40 26.2 431 62.6 5.1 8.5

7/27/1999 7:00:40 26.17 432 62.6 5.1 8.4

7/27/1999 7:30:40 26.14 434 62.6 5.1 8.4

7/27/1999 8:00:40 26.12 438 64 5.2 8.4

7/27/1999 8:30:40 26.12 439 65.3 5.3 8.4

7/27/1999 9:00:40 26.13 440 66.8 5.4 8.4

7/27/1999 9:30:40 26.19 440 69.2 5.6 8.4

Site 48

7/27/1999 15:00:40 28.55 422 99.5 7.7 9.1

7/27/1999 15:30:40 28.52 424 100.7 7.8 9.1

7/27/1999 16:00:40 28.48 426 101.4 7.9 9.1

7/27/1999 16:30:40 28.46 428 103.8 8.1 9.1

7/27/1999 17:00:40 28.41 429 104.9 8.1 9.0

7/27/1999 17:30:40 28.37 431 103 8.0 9.0

7/27/1999 18:00:40 28.37 433 103 8.0 9.0

7/27/1999 18:30:40 28.4 433 104.7 8.1 9.0

7/27/1999 19:00:40 28.45 433 105.6 8.2 9.0

7/27/1999 19:30:40 28.5 433 106.8 8.3 9.0

7/27/1999 20:00:40 28.53 432 106.7 8.3 9.0

7/27/1999 20:30:40 28.54 432 105.6 8.2 9.0

7/27/1999 21:00:40 28.51 432 104.7 8.1 9.0

7/27/1999 21:30:40 28.46 431 104.3 8.1 9.0

7/27/1999 22:00:40 28.42 430 104.6 8.1 9.0

7/27/1999 22:30:40 28.37 429 104.7 8.1 9.1

7/27/1999 23:00:40 28.29 428 104.2 8.1 9.1

7/27/1999 23:30:40 28.26 426 104.9 8.2 9.1

7/28/1999 0:00:40 28.19 424 104.5 8.2 9.1

7/28/1999 0:30:40 28.13 422 104.4 8.2 9.1

7/28/1999 1:00:40 28.05 421 103.5 8.1 9.2

7/28/1999 1:30:40 27.97 420 102.4 8.0 9.2

7/28/1999 2:00:40 27.89 419 100.9 7.9 9.2

7/28/1999 2:30:40 27.8 418 99.3 7.8 9.2

7/28/1999 3:00:40 27.71 417 96.9 7.6 9.2

7/28/1999 3:30:40 27.61 416 94.5 7.4 9.2

7/28/1999 4:00:40 27.51 415 92 7.3 9.2

7/28/1999 4:30:40 27.42 415 89.6 7.1 9.2

7/28/1999 5:00:40 27.3 414 86.8 6.9 9.3

7/28/1999 5:30:40 27.19 413 84.1 6.7 9.3

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 77

7/28/1999 6:00:40 27.06 413 81.2 6.5 9.3

7/28/1999 6:30:40 26.94 413 78.9 6.3 9.3

7/28/1999 7:00:40 26.83 412 77.1 6.2 9.3

7/28/1999 7:30:40 26.74 412 76.3 6.1 9.3

7/28/1999 8:00:40 26.7 412 76.6 6.1 9.3

7/28/1999 8:30:40 26.74 411 78.5 6.3 9.3

7/28/1999 9:00:40 26.83 411 81.3 6.5 9.3

7/28/1999 9:30:40 26.96 410 84.5 6.7 9.3

7/28/1999 10:00:40 27.15 409 88 7.0 9.3

7/28/1999 10:30:40 27.43 409 92.9 7.3 9.3

7/28/1999 11:00:40 27.75 409 98.2 7.7 9.3

7/28/1999 11:30:40 28.11 408 103.1 8.0 9.3

7/28/1999 12:00:40 28.44 409 107.1 8.3 9.3

7/28/1999 12:30:40 28.76 409 110.3 8.5 9.3

7/28/1999 13:00:40 28.93 410 111.4 8.6a 9.3

7/28/1999 13:30:40 28.96 411 108.8 8.4 9.2

7/28/1999 14:00:40 28.83 413 105.5 8.1 9.2

7/28/1999 14:30:40 28.62 415 102.1 7.9 9.2

7/28/1999 15:00:40 28.38 417 96.1 7.5 9.1

7/28/1999 15:30:40 28.16 418 92 7.2 9.1

7/28/1999 16:00:40 27.95 419 88.8 7.0 9.1

7/28/1999 16:30:40 27.73 421 85.7 6.7 9.1

7/28/1999 17:00:40 27.55 419 84.5 6.7 9.0

7/28/1999 17:30:40 27.46 419 86.2 6.8 9.0

7/28/1999 18:00:40 27.48 418 91 7.2 9.0

7/28/1999 18:30:40 27.48 417 93.5 7.4 9.0

7/28/1999 19:00:40 27.51 417 95.5 7.5 9.1

7/28/1999 19:30:40 27.57 416 98.4 7.8 9.1

7/28/1999 20:00:40 27.59 416 99.7 7.9 9.1

7/28/1999 20:30:40 27.55 416 98.8 7.8 9.1

7/28/1999 21:00:40 27.46 415 97.8 7.7 9.1

7/28/1999 21:30:40 27.38 415 96.5 7.6 9.1

7/28/1999 22:00:40 27.31 414 95.4 7.6 9.1

7/28/1999 22:30:40 27.25 414 94.6 7.5 9.1

7/28/1999 23:00:40 27.15 413 93.3 7.4 9.1

7/28/1999 23:30:40 27.09 412 92.1 7.3 9.1

7/29/1999 0:00:40 27.01 411 91.3 7.3 9.1

7/29/1999 0:30:40 26.92 410 90.2 7.2 9.2

7/29/1999 1:00:40 26.83 409 89.1 7.1 9.2

7/29/1999 1:30:40 26.74 408 88.2 7.1 9.2

7/29/1999 2:00:40 26.63 407 86.7 7.0 9.2

7/29/1999 2:30:40 26.52 407 85.3 6.9 9.2

7/29/1999 3:00:40 26.4 406 83.6 6.7 9.2

7/29/1999 3:30:40 26.28 406 81.9 6.6 9.2

7/29/1999 4:00:40 26.18 406 80.1 6.5 9.2

7/29/1999 4:30:40 26.07 406 78.3 6.3 9.2

7/29/1999 5:00:40 25.97 406 76.5 6.2 9.2

7/29/1999 5:30:40 25.87 406 74.6 6.1 9.2

7/29/1999 6:00:40 25.77 406 73 5.9 9.2

7/29/1999 6:30:40 25.68 406 71.5 5.8 9.2

7/29/1999 7:00:40 25.56 406 70.4 5.8 9.2

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
78 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/29/1999 7:30:40 25.46 406 69.6 5.7b 9.2

7/29/1999 8:00:40 25.38 406 70.5 5.8 9.2

7/29/1999 8:30:40 25.29 406 70.7 5.8 9.2

Site 49

7/27/1999 15:30:40 28.25 406 107.5 8.4 9.0

7/27/1999 16:00:40 28.32 407 108.6 8.5 9.0

7/27/1999 16:30:40 28.35 407 110.3 8.6 9.0

7/27/1999 17:00:40 28.34 411 110.5 8.6 9.0

7/27/1999 17:30:40 28.18 411 108.7 8.5 9.0

7/27/1999 18:00:40 28.23 415 107.7 8.4 9.0

7/27/1999 18:30:40 28.22 414 107.3 8.4 9.0

7/27/1999 19:00:40 28.28 416 107.5 8.4 9.0

7/27/1999 19:30:40 28.22 410 107.5 8.4 8.9

7/27/1999 20:00:40 28.3 414 107.5 8.4 9.0

7/27/1999 20:30:40 28.28 412 106.5 8.3 9.0

7/27/1999 21:00:40 28.27 412 105 8.2 9.0

7/27/1999 21:30:40 28.2 410 103.4 8.1 9.0

7/27/1999 22:00:40 28.13 409 102.2 8.0 9.0

7/27/1999 22:30:40 28.05 408 101.7 8.0 9.0

7/27/1999 23:00:40 27.98 408 101.3 7.9 9.0

7/27/1999 23:30:40 27.9 407 100.9 7.9 9.0

7/28/1999 0:00:40 27.8 406 100.3 7.9 9.0

7/28/1999 0:30:40 27.7 405 99.9 7.9 9.0

7/28/1999 1:00:40 27.63 404 99.7 7.9 9.1

7/28/1999 1:30:40 27.52 403 98.5 7.8 9.1

7/28/1999 2:00:40 27.41 402 97.2 7.7 9.1

7/28/1999 2:30:40 27.32 402 96 7.6 9.1

7/28/1999 3:00:40 27.23 402 94.5 7.5 9.1

7/28/1999 3:30:40 27.11 401 92.4 7.3 9.1

7/28/1999 4:00:40 27.01 401 90.4 7.2 9.1

7/28/1999 4:30:40 26.91 401 88.5 7.1 9.1

7/28/1999 5:00:40 26.79 401 86.3 6.9 9.1

7/28/1999 5:30:40 26.66 400 84.1 6.7 9.1

7/28/1999 6:00:40 26.55 400 81.9 6.6 9.1

7/28/1999 6:30:40 26.43 400 79.6 6.4 9.1

7/28/1999 7:00:40 26.29 400 78.1 6.3 9.1

7/28/1999 7:30:40 26.19 400 77 6.2 9.1

7/28/1999 8:00:40 26.18 401 77.4 6.3 9.1

7/28/1999 8:30:40 26.16 400 78.8 6.4 9.1

7/28/1999 9:00:40 26.22 400 80.9 6.5 9.1

7/28/1999 9:30:40 26.34 399 84.1 6.8 9.1

7/28/1999 10:00:40 26.5 399 87.4 7.0 9.1

7/28/1999 10:30:40 26.74 399 91.3 7.3 9.1

7/28/1999 11:00:40 27.05 398 96.1 7.6 9.2

7/28/1999 11:30:40 27.35 398 101.2 8.0 9.2

7/28/1999 12:00:40 27.74 398 106.1 8.3 9.2

7/28/1999 12:30:40 28.13 397 110.6 8.6 9.2

7/28/1999 13:00:40 28.38 397 113.1 8.8a 9.2

7/28/1999 13:30:40 28.45 398 113 8.8 9.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 79

7/28/1999 14:00:40 28.49 399 112.1 8.7 9.1

7/28/1999 14:30:40 28.32 398 109.9 8.5 9.1

7/28/1999 15:00:40 28.08 399 106.5 8.3 9.1

7/28/1999 15:30:40 27.92 401 101 7.9 9.0

7/28/1999 16:00:40 27.72 402 97.2 7.6 9.0

7/28/1999 16:30:40 27.56 403 93.2 7.4 9.0

7/28/1999 17:00:40 27.36 404 90 7.1 9.0

7/28/1999 17:30:40 27.25 403 89.4 7.1 9.0

7/28/1999 18:00:40 27.16 401 90.6 7.2 8.9

7/28/1999 18:30:40 27.18 403 92.1 7.3 9.0

7/28/1999 19:00:40 27.14 400 93.9 7.5 9.0

7/28/1999 19:30:40 27.19 401 96.8 7.7 9.0

7/28/1999 20:00:40 27.18 400 98.1 7.8 9.0

7/28/1999 20:30:40 27.14 400 97.8 7.8 9.0

7/28/1999 21:00:40 27.06 399 96.9 7.7 9.0

7/28/1999 21:30:40 26.97 399 95.7 7.6 9.0

7/28/1999 22:00:40 26.86 399 94.4 7.5 9.0

7/28/1999 22:30:40 26.78 399 93 7.4 9.0

7/28/1999 23:00:40 26.71 399 92 7.4 9.0

7/28/1999 23:30:40 26.59 398 90.6 7.3 9.0

7/29/1999 0:00:40 26.52 398 89.7 7.2 9.0

7/29/1999 0:30:40 26.41 396 88.6 7.1 9.0

7/29/1999 1:00:40 26.32 396 87.6 7.1 9.0

7/29/1999 1:30:40 26.24 395 86.7 7.0 9.1

7/29/1999 2:00:40 26.12 394 85.5 6.9 9.1

7/29/1999 2:30:40 26.03 394 84.4 6.8 9.1

7/29/1999 3:00:40 25.9 394 83.2 6.8 9.1

7/29/1999 3:30:40 25.79 394 81.7 6.7 9.1

7/29/1999 4:00:40 25.69 394 80.4 6.6 9.1

7/29/1999 4:30:40 25.6 395 79 6.5 9.1

7/29/1999 5:00:40 25.47 394 77.4 6.3 9.1

7/29/1999 5:30:40 25.36 394 76 6.2 9.1

7/29/1999 6:00:40 25.3 395 74.7 6.1 9.1

7/29/1999 6:30:40 25.2 396 73.5 6.1 9.1

7/29/1999 7:00:40 25.07 395 72.7 6.0 9.1

7/29/1999 7:30:40 24.96 395 71.9 5.9b 9.1

7/29/1999 8:00:40 24.93 396 71.9 5.9 9.1

7/29/1999 8:30:40 24.84 396 72.2 6.0 9.1

Site 50

7/28/1999 14:00:40 27.37 405 85.9 6.8 9.0

7/28/1999 14:30:40 27.38 404 83.3 6.6 9.0

7/28/1999 15:00:40 27.37 403 83.6 6.6 9.0

7/28/1999 15:30:40 27.36 403 84 6.6 9.0

7/28/1999 16:00:40 27.35 403 85.2 6.7 9.1

7/28/1999 16:30:40 27.37 402 88.4 7.0 9.1

7/28/1999 17:00:40 27.4 400 92.5 7.3 9.1

7/28/1999 17:30:40 27.5 398 97.8 7.7 9.1

7/28/1999 18:00:40 27.6 397 102.3 8.1 9.1

7/28/1999 18:30:40 27.63 398 102.5 8.1 9.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
80 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/28/1999 19:00:40 27.69 397 104.6 8.2 9.1

7/28/1999 19:30:40 27.76 396 107.8 8.5 9.2

7/28/1999 20:00:40 27.84 394 111.1 8.7 9.2

7/28/1999 20:30:40 27.89 394 112.6 8.8 9.2

7/28/1999 21:00:40 27.94 393 114.7 9.0 9.2

7/28/1999 21:30:40 27.94 391 116.1 9.1 9.2

7/28/1999 22:00:40 27.87 391 115.4 9.1 9.2

7/28/1999 22:30:40 27.77 392 112.3 8.8 9.2

7/28/1999 23:00:40 27.67 392 109.4 8.6 9.2

7/28/1999 23:30:40 27.5 393 104.8 8.3 9.2

7/29/1999 0:00:40 27.34 394 100.4 8.0 9.1

7/29/1999 0:30:40 27.22 395 97.7 7.8 9.1

7/29/1999 1:00:40 27.07 395 95.3 7.6 9.1

7/29/1999 1:30:40 26.93 396 91.5 7.3 9.1

7/29/1999 2:00:40 26.77 397 87.7 7.0 9.1

7/29/1999 2:30:40 26.59 398 84.2 6.8 9.0

7/29/1999 3:00:40 26.46 399 82.1 6.6 9.0

7/29/1999 3:30:40 26.28 400 79.1 6.4 9.0

7/29/1999 4:00:40 26.18 401 77 6.2 9.0

7/29/1999 4:30:40 26.04 402 74.9 6.1 9.0

7/29/1999 5:00:40 25.9 403 72.7 5.9 8.9

7/29/1999 5:30:40 25.78 402 71.5 5.8 8.9

7/29/1999 6:00:40 25.63 402 70 5.7 8.9

7/29/1999 6:30:40 25.54 402 68.9 5.6 8.9

7/29/1999 7:00:40 25.41 402 68.5 5.6 8.9

7/29/1999 7:30:40 25.31 401 67.4 5.5 8.9

7/29/1999 8:00:40 25.24 401 67.2 5.5 8.9

7/29/1999 8:30:40 25.15 400 66.9 5.5 8.9

7/29/1999 9:00:40 25.16 400 66.7 5.5 8.9

7/29/1999 9:30:40 25.23 402 66.8 5.5 8.9

7/29/1999 10:00:40 25.39 403 66.8 5.5b 8.9

7/29/1999 10:30:40 25.4 402 68.5 5.6 8.9

7/29/1999 11:00:40 25.58 401 70.4 5.8 8.9

7/29/1999 11:30:40 25.7 400 71.8 5.9 8.9

7/29/1999 12:00:40 25.93 398 72.6 5.9 9.0

7/29/1999 12:30:40 26.27 398 74.1 6.0 9.0

7/29/1999 13:00:40 26.3 397 74.5 6.0 9.0

7/29/1999 13:30:40 26.52 397 76.2 6.1 9.0

7/29/1999 14:00:40 26.62 396 77 6.2 9.0

7/29/1999 14:30:40 26.74 396 78.1 6.3 9.0

7/29/1999 15:00:40 26.89 396 80.6 6.4 9.0

7/29/1999 15:30:40 26.95 395 83.3 6.6 9.0

7/29/1999 16:00:40 27.06 394 87 6.9 9.0

7/29/1999 16:30:40 27.09 394 91.1 7.2 9.0

7/29/1999 17:00:40 27.2 393 94.9 7.5 9.1

7/29/1999 17:30:40 27.37 393 100.2 7.9 9.1

7/29/1999 18:00:40 27.47 392 105.2 8.3 9.1

7/29/1999 18:30:40 27.55 391 109.5 8.6 9.1

7/29/1999 19:00:40 27.63 391 113 8.9 9.1

7/29/1999 19:30:40 27.66 391 114.1 9.0 9.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
Appendix 81

7/29/1999 20:00:40 27.71 391 115.7 9.1 9.1

7/29/1999 20:30:40 27.74 391 117.2 9.2 9.1

7/29/1999 21:00:40 27.8 390 119.7 9.4 9.1

7/29/1999 21:30:40 27.81 390 123 9.7a 9.1

7/29/1999 22:00:40 27.76 390 122.8 9.6 9.1

7/29/1999 22:30:40 27.71 391 122 9.6 9.1

7/29/1999 23:00:40 27.64 392 121 9.5 9.1

7/29/1999 23:30:40 27.57 393 119.6 9.4 9.1

7/30/1999 0:00:40 27.51 394 118.3 9.3 9.1

7/30/1999 0:30:40 27.44 395 117.1 9.3 9.1

7/30/1999 1:00:40 27.32 396 115.8 9.2 9.1

7/30/1999 1:30:40 27.18 397 113.3 9.0 9.0

7/30/1999 2:00:40 27.07 399 110.4 8.8 9.0

7/30/1999 2:30:40 26.97 399 107.8 8.6 9.0

7/30/1999 3:00:40 26.85 400 104.5 8.3 9.0

7/30/1999 3:30:40 26.77 401 101.5 8.1 9.0

7/30/1999 4:00:40 26.63 402 97.9 7.9 9.0

7/30/1999 4:30:40 26.49 402 93.6 7.5 9.0

7/30/1999 5:00:40 26.33 403 89.1 7.2 8.9

7/30/1999 5:30:40 26.19 403 85.3 6.9 8.9

7/30/1999 6:00:40 26.02 404 80.7 6.5 8.9

7/30/1999 6:30:40 25.93 403 78 6.3 8.9

7/30/1999 7:00:40 25.74 403 74 6.0 8.8

7/30/1999 7:30:40 25.71 402 73 6.0 8.8

7/30/1999 8:00:40 25.7 401 72.4 5.9 8.8

7/30/1999 8:30:40 25.64 401 71.4 5.8 8.8

Site 51

7/29/1999 9:30:40 25.39 402 78.3 6.4 8.9

7/29/1999 10:00:40 25.46 402 77.9 6.4b 8.9

7/29/1999 10:30:40 25.65 402 79.9 6.5 8.9

7/29/1999 11:00:40 25.85 402 82.2 6.7 8.9

7/29/1999 11:30:40 26.04 401 84.1 6.8 8.9

7/29/1999 12:00:40 26.29 401 86.5 7.0 8.9

7/29/1999 12:30:40 26.3 400 85.3 6.9 8.9

7/29/1999 13:00:40 26.55 399 89.1 7.2 9.0

7/29/1999 13:30:40 26.75 398 89.8 7.2 9.0

7/29/1999 14:00:40 26.87 397 92.4 7.4 9.0

7/29/1999 14:30:40 26.89 397 91.3 7.3 9.0

7/29/1999 15:00:40 27.04 397 94.4 7.5 9.0

7/29/1999 15:30:40 27.07 396 94.9 7.6 9.0

7/29/1999 16:00:40 27.08 396 95.5 7.6 9.0

7/29/1999 16:30:40 27.08 395 97.1 7.7 9.0

7/29/1999 17:00:40 27.25 395 102.5 8.1 9.0

7/29/1999 17:30:40 27.33 394 104.9 8.3 9.1

7/29/1999 18:00:40 27.41 394 106.3 8.4 9.1

7/29/1999 18:30:40 27.44 393 107 8.5 9.1

7/29/1999 19:00:40 27.52 393 108.6 8.6 9.1

7/29/1999 19:30:40 27.61 392 110.4 8.7 9.1

7/29/1999 20:00:40 27.67 392 110.8 8.7 9.1

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

Appendix Continued
82 Water-Quality Synoptic Sampling, July 1999: North Fork Shenandoah River, Virginia

7/29/1999 20:30:40 27.7 392 111.2 8.8 9.1

7/29/1999 21:00:40 27.7 392 111.7 8.8 9.1

7/29/1999 21:30:40 27.72 392 112.4 8.8 9.1

7/29/1999 22:00:40 27.74 392 113.3 8.9 9.1

7/29/1999 22:30:40 27.73 392 113.5 8.9a 9.1

7/29/1999 23:00:40 27.7 392 113.3 8.9 9.1

7/29/1999 23:30:40 27.65 393 112.8 8.9 9.1

7/30/1999 0:00:40 27.59 394 112.1 8.8 9.1

7/30/1999 0:30:40 27.52 395 111.3 8.8 9.1

7/30/1999 1:00:40 27.45 396 110.4 8.7 9.1

7/30/1999 1:30:40 27.35 397 108.8 8.6 9.1

7/30/1999 2:00:40 27.26 398 107.1 8.5 9.1

7/30/1999 2:30:40 27.15 399 105.2 8.4 9.0

7/30/1999 3:00:40 27.03 399 103 8.2 9.0

7/30/1999 3:30:40 26.9 401 100.4 8.0 9.0

7/30/1999 4:00:40 26.76 402 97.4 7.8 9.0

7/30/1999 4:30:40 26.61 403 94.1 7.5 8.9

7/30/1999 5:00:40 26.46 403 90.8 7.3 8.9

7/30/1999 5:30:40 26.31 404 87.6 7.1 8.9

7/30/1999 6:00:40 26.18 404 84.9 6.9 8.9

7/30/1999 6:30:40 26.06 404 82.5 6.7 8.8

7/30/1999 7:00:40 25.97 404 81.2 6.6 8.8

7/30/1999 7:30:40 25.92 404 81.1 6.6 8.8

7/30/1999 8:00:40 25.89 403 80.2 6.5 8.8

7/30/1999 8:30:40 25.84 403 79.5 6.5 8.8

7/30/1999 9:00:40 25.85 402 80.4 6.5 8.8

Date Time

Water

temperature

(

o

C)

SC

(μS/cm)

DOsat

(percent)

DO

(mg/L)

pH

(standard 

units)

a

Maximum dissolved-oxygen concentration

bMinimum dissolved-oxygen concentration

Appendix Continued