U.S. GEOLOGICAL SURVEY

Open-File Report

Water-Quality Monitoring of Sweetwater and 

Loveland Reservoirs, San Diego County, 

California—Phase One Results, 1998–1999

By Michael S. Majewski1, Jagdeep S. Sidhu2, and Gregory O. Mendez1

Sacramento, California

2002

02-186

5008-20

Prepared in cooperation with the

SWEETWATER AUTHORITY

1

U.S. Geological Survey, Placer Hall, 6000 J Street, Sacramento, California 95819-6129

2

California State University Sacramento Foundation, 6000 J Street, Sacramento, California 95819-6129
U.S. DEPARTMENT OF THE INTERIOR

GALE A. NORTON, Secretary

U.S. GEOLOGICAL SURVEY

Charles G. Groat, Director

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

not constitute endorsement by the U.S. Geological Survey.

For additional information write to: Copies of this report can be purchased

U.S. Geological Survey

Branch of Information Services

Box 25286

Denver, CO 80225-0286

from:

U.S. Geological Survey

Water Resources

Placer Hall, Suite 2012

6000 J Street

Sacramento, California 95819-6129
Contents III

CONTENTS

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

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

Study Design ........................................................................................................................................................................ 3

Site Selection and Sampling Strategy ................................................................................................................................... 5

Water Sampling .......................................................................................................................................................... 5

Air Sampling .............................................................................................................................................................. 6

Bed Sediment Sampling ............................................................................................................................................. 7

Sediment Core Sampling .................................................................................................................................. 7

Surficial Bed Sediment Sampling .................................................................................................................... 7

Analytical Methods .............................................................................................................................................................. 7

Water .......................................................................................................................................................................... 7

Air ............................................................................................................................................................................... 8

Sediment ..................................................................................................................................................................... 8

Quality Control ..................................................................................................................................................................... 8

Sampling ..................................................................................................................................................................... 8

Analytical ................................................................................................................................................................... 9

References Cited ................................................................................................................................................................... 9

FIGURES

1–3. Maps showing:

1. Sweetwater and Loveland Reservoirs and surrounding watershed, San Diego County, California . . . . . . . . . . . 2

2. The most probable alignment of State Route 125 and Sweetwater Reservoir sampling sites, San Diego 

County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3. Loveland Reservoir sampling sites, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

TABLES

1. Site identification numbers, site numbers, and corresponding site names, Sweetwater and Loveland 

Reservoirs, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for 

the Sweetwater and Loveland Reservoirs sampling sites, San Diego County, California, . . . . . . . . . . . . . . . . . . . 11

3. Analytical results for volatile organic compound concentrations in water samples, Sweetwater and 

Loveland Reservoirs, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, 

San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

5A. Analytical results for chlorofluorocarbons and other compounds with low breakthrough volumes for the 

Sweetwater Reservoir air sampling site, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

5B. Analytical results for the remaining volatile organic compound analytes for the Sweetwater Reservoir 

air sampling site, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

 6. Analytical results for pesticide concentrations from the Sweetwater Reservoir air sampling site, San Diego 

County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
IV Contents

7. Analytical results for polynuclear aromatic hydrocarbon compound concentrations in core segments 

and reservoir and urban runoff diversion system pond surficial bed sediment samples, Sweetwater 

Reservoir, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

8. Analytical results for organochlorine insecticide concentrations in selected core segments and reservoir 

and urban runoff diversion system ponds surficial bed sediment samples, Sweetwater 

and Loveland Reservoirs, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

9. Analytical results for major and trace element concentrations in bed sediment core, Sweetwater Reservoir, 

San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

10. Results of cesium 137 age determinations and estimated dates for bed sediment core segments, 

Sweetwater Reservoir, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

11. Visual descriptive comments of core contents, color, and texture for the Sweetwater Reservoir sampling 

sites, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

12. Quality assurance analytical results for volatile organic compound concentrations in water samples, 

Sweetwater and Loveland Reservoirs, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

13. Quality assurance analytical results for pesticide concentrations in water samples, Sweetwater and 

Loveland Reservoirs, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

14. Quality assurance analytical results for polynuclear aromatic hydrocarbon compound concentrations

 in core segments and urban runoff diversion system pond surficial bed sediment samples, 

Sweetwater Reservoir, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

15. Quality assurance analytical results for organochlorine insecticide concentrations in select core segments 

and in reservoir and urban runoff diversion system ponds surficial bed sediment samples from the 

Sweetwater Reservoir, San Diego County, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Contents V

CONVERSION FACTORS, VERTICAL DATUM, ABBREVIATIONS, AND ACRONYMS

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

°F = (1.8)°C + 32

Sea level: In this report “sea level” refers to the National Geodetic Vertical Datum of 1929 (NGVD of 

1929)—a geodetic datum derived from a general adjustment of the first-order level nets of both the 

United States and Canada, formerly called Sea Level Datum of 1929.

Abbreviations and Acronyms

acre-ft, acre-foot

Authority, Sweetwater Authority

GC/MS, gas chromatography/mass spectrometry

GFF, glass fiber filter

g/m3, gram per cubic meter

L, liter

L/min, liter per minute

LLR, Loveland Reservoir

MCL, maximum contaminant level

MDL, method detection limit

mg, milligram

mi, mile

mm, millimeter

NAWQA, National Water-Quality Assessment (Program)

NWQL, National Water Quality Laboratory

OC, organochlorine

PAH, polynuclear aromatic hydrocarbon

PCB, polychlorinated biphenyl

PUF, polyurethane foam

SOC, semivolatile organic chemical

SR, State Route

SWR, Sweetwater Reservoir

USGS, U.S. Geological Survey

URDS, urban runoff diversion system

VOC, volatile organic compound

Multiply By To obtain

centimeter (cm) 0.3937 inch

meter (m) 3.281 foot

kilometer (km) 0.6214 mile

square kilometer (km2) .3861 square mile
THIS PAGE INTENTIONALLY LEFT BLANK
Introduction 1

Water-Quality Monitoring of Sweetwater and Loveland 

Reservoirs, San Diego County, California—Phase One 

Results, 1998–1999

by Michael S. Majewski, Jagdeep S. Sidhu, and Gregory O. Mendez

ABSTRACT

In 1998, the U.S. Geological Survey began a 

study to assess the overall health of the watershed 

feeding the Sweetwater Reservoir in southern San 

Diego County, California. The study focussed on 

monitoring for organic chemical contamination 

and the effects of construction and operation of 

State Route 125 on water quality. Three environmental compartments (air, water, and bed sediments) are being sampled regularly for chemical 

contaminants, including volatile organic compounds, polynuclear aromatic hydrocarbons, 

polychlorinated biphenyls, pesticides, and major 

and trace elements. The study is divided into two 

phases. Phase I sampling is designed to establish 

baseline conditions for target compounds in terms 

of detection frequency and concentration in air, 

water, and bed sediments. Phase II sampling will 

continue at the established monitoring sites during 

and after construction of State Route 125 to assess 

chemical impact on water quality in the reservoir 

resulting from land-use changes and development 

in the watershed. This report describes the study 

design, the sampling and analytical methods, and 

presents the data results for the first year of the 

study, September 1998 to September 1999.

INTRODUCTION

The Sweetwater Authority (hereinafter referred 

to as the Authority), under the guidance of its Board of 

Directors, operates a public drinking water supply 

system for over 175,000 residential and commercial 

customers in Chula Vista, National City, and Bonita, 

California. The Sweetwater Reservoir (SWR) (fig. 1), 

which has a storage capacity of 28,079 acre-ft (acrefoot) of water, is located about 15 km (kilometer) 

southeast of San Diego, California. The Authority also 

stores water at Loveland Reservoir (LLR), which has a 

storage capacity of 25,387 acre-ft and is located about 

30 km east of SWR near Alpine, California. In addition 

to the two reservoirs, the Authority operates two deep 

wells in National City, California, and treats brackish 

ground water at the Lower Sweetwater River Basin 

Demineralization Facility in Chula Vista. Seventy 

percent of the water the Authority provides comes from 

local supplies that include the Sweetwater River, the 

Sweetwater alluvium, and the San Diego Groundwater 

Formation. The remaining water is imported from 

sources such as the Colorado River and the 

Sacramento/San Joaquin River systems through major 

aqueducts. Both local reservoir and imported waters 

are treated at the Robert A. Perdue treatment plant 

located at the SWR.

Currently, the SWR has no recreational activities. At LLR, only shore fishing is allowed in a 

restricted area at the east end of the reservoir. The 

Authority maintains one motorized boat at each 

reservoir for routine water sampling and regular shore 

patrols. 

The Sweetwater River watershed covers 466 km2

(square kilometer). Although much of the land is 

undeveloped, the area includes the Sycuan and Viejas 

Indian Reservations (both have gaming facilities), a 

part of the Cleveland National Forest, agricultural land, 

rural residential acreage, urban and suburban residential development, mining and industrial land use, 

commercial recreation, and commercial business 

development. The watershed currently includes three 

18-hole golf courses; a fourth is being planned in 

conjunction with a new residential community. The 

Authority is very concerned about the impact that 

increasing growth and development in the Sweetwater 
2 Water-Quality Monitoring, Sweetwater and Loveland Reservoirs, San Diego County, Calif.—Phase One Results, 1998–1999

0 123 4 Kilometers

0 1 2 3 4 Miles

Sweetwater 

Reservoir

Loveland

Reservoir

Alpine

Bonita

Chula Vista

Sweetwater

River

S17

54

S17 125

125

94

94

805

8

8

8

67

116

45

3245323730

117

Study area

San

Diego

Los

Angeles

National

City

San

Francisco

Figure 1. Sweetwater and Loveland Reservoirs and surrounding watershed, San Diego County, California.
Study Design 3

River watershed will have on the quality of the 

drinking water supply and has initiated a variety of 

efforts to protect the watershed, including source 

assessments, watershed stakeholders outreach to 

identify issues, total organic carbon assessments, and 

the construction and operation of an urban runoff 

diversion system (URDS). These programs help the 

Authority evaluate the overall environmental health of 

the watershed by monitoring changes that can degrade 

the quality of the water supply and necessitate additional water treatment as the population increases and 

land use intensifies. The consequence of local inputs of 

anthropogenic compounds, such as organic chemicals 

and pesticides, on the watershed and reservoir water 

quality is largely unknown. 

In addition to the increasing urbanization 

pressures within the watershed, another Authority 

concern, and the primary reason for this study, is the 

construction and operation of State Route (SR) 125. In 

1984, the San Diego Association of Governments 

added SR-125 to the Regional Transportation Plan as 

part of San Diego’s future highway system. The 

SR-125 project consists of approximately 18 km [11 mi 

(mile)] of roadway construction in one of three 

possible alignment configurations that extend from 

SR-54 (northern terminus) to Interstate 905 (southern 

terminus) (fig. 2). The project plans call for the initial 

construction of a four-lane highway that will be 

expanded to eight lanes (California Department of 

Transportation, 2001). More than 200,000 vehicles 

per day, including a high percentage (more than 

10 percent) of heavy diesel trucks from both the United 

States and Mexico, are expected to travel SR-125. The 

alignment will be elevated about 30 m (meter) at its 

highest point, and the most likely construction scenario 

will bring SR-125 within 150 m of the reservoir at its 

nearest point. Because the SWR is downwind of all 

proposed alignments, the Authority became concerned 

that toxic vehicle emissions, as well as paved road 

dusts, might enter the reservoir by atmospheric 

deposition in concentrations that could affect public 

health and impact the cost of treating the drinking 

water supply. 

In 1996 the Authority commissioned a study 

(Ogden Environmental and Energy Services, 1997) to 

model the atmospheric depositional loading to SWR of 

a variety of toxic compounds from vehicular fuel 

combustion emissions and any attendant health risks 

associated with the three SR-125 alignment scenarios. 

The predicted concentrations of select contaminants 

were compared with the standards set by the California 

Safe Drinking Water Act (California Environmental 

Protection Agency, 1986) and to California and federal 

maximum contaminant levels (MCL). The results 

showed that drinking water guidance levels for one or 

more contaminants would be exceeded in all three 

alternative freeway construction options. Both the 

Authority and the U.S. Environmental Protection 

Agency Region IX concluded that the findings in 

Ogden report (Ogden Environmental and Energy 

Services, 1997) warranted the implementation of a 

monitoring program to measure the impact that 

atmospheric deposition of vehicular emissions from the 

operation of SR-125 may have on the quality of the 

drinking water stored in the SWR. 

The Authority is assessing all factors that can 

affect water quality in the reservoir, as well as maintaining the highest environmental quality in the entire 

watershed. Responding to these concerns, the 

Authority initiated a monitoring study in cooperation 

with the U.S. Geological Survey (USGS).

This report assesses the chemical impact on 

water quality in the reservoir resulting from land use 

changes and development in the watershed. The scope 

of the study is to compare the analytical results of 

samples from three environmental media—air, water, 

and bed sediment—and determine whether any 

measured changes in reservoir water quality are the 

result of atmospheric deposition of organic chemicals 

and metals originating from the construction and 

operation of SR-125. Where applicable, the measured 

concentrations of select organic chemicals will be used 

as inputs to a mathematical model to assess future 

trends and impacts on the reservoir water quality.

STUDY DESIGN

The study design consists of two phases and 

includes sampling air, water, and bed sediments in each 

of them. Each of the environmental compartments in 

the Sweetwater watershed is being sampled and 

analyzed for those compounds expected to accumulate.

• Air—volatile organic compounds (VOC), 

polynuclear aromatic hydrocarbons (PAH), 

and pesticides. 

• Water—VOCs and pesticides. 

• Bed sediments—PAHs, total polychlorinated 

biphenyls (PCB), pesticides, and

• Major and trace elements. 
4 Water-Quality Monitoring, Sweetwater and Loveland Reservoirs, San Diego County, Calif.—Phase One Results, 1998–1999 117o 117o 57' 30" 32o 42' 30" 32o 41'

15"

1

2

4

3 5

A

B

C1

C2

D1

D2

7

6

8

9

10

1 Near Pump Tower2 Near Vista del Lago3 Center of Minimum Pool4 Near Recreation Site5 Minimum Pool Boundary East6 East End Reservoir Fill Boundary7 Near Gum Tree Cove Pond

0 1 Kilometer

0 1 Mile 0.5

0.5

Water sample and surficial bed sediment

Urban Runoff Diversion System

Sweetwater Reservoir

8 Perdue Treatment Plant Finished Water9 Perdue Treatment Plant Raw Imported Water10 Sweetwater River at Low Flow Diversion

Water sample 

Air sampling site

Sediment core sampling site

EXPLANATION

Sweetwater ReservoirReservoir minimum pool  boundaryProposed SR-125  AlignmentRoadsRiver or pipeline

Sweetwater River

Low Flow Diversion

To SR-905

125

S17

S17

S17

54

Figure 2. The most probable alignment of State Route 125 and Sweetwater Reservoir sampling sites, San Diego County, California. 
Site Selection and Sampling Strategy 5

To the extent possible, the sampling and analytical methods of the USGS National Water-Quality 

Assessment (NAWQA) Program are being used and the 

results entered into the USGS National Water 

Information System database. 

During phase I, the water sampling sites were 

established at both SWR and LLR, the air sampling 

station was established at SWR, and regularly scheduled air and water sampling began. A one-time coring 

of the SWR bed sediments also was done along with an 

initial sampling of the surficial bed sediments at each 

of the reservoir water sampling sites and URDS ponds. 

The major objective of phase I is to determine the 

occurrence and concentration of select organic and 

inorganic contaminants in each of the three environmental media and to establish baseline conditions for 

the target analytes before construction of SR-125 

begins. 

Phase II sampling will begin with the construction of SR-125. Air, water, and surficial bed sediment 

monitoring will continue at the established sites during 

and after the construction of SR-125. A second air 

sampling station may be installed to monitor airborne 

anthropogenic compounds originating from areas 

upwind of the SR-125 alignment. The analytical results 

from the phase II monitoring will be compared with 

those from phase I to assess the impact of SR-125 on 

water quality in SWR. Phase II monitoring also will 

assess the continuing inputs of anthropogenic organic 

compounds resulting from the land-use practices in the 

watershed. 

A computer modeling program (LakeVOC) will 

be used to estimate the air–water partitioning behavior 

for select VOCs detected in the air and water at SWR. 

The model is not restricted to estimating VOC partitioning behavior. It also can be used to estimate the 

partitioning behavior of semivolatile organic chemicals 

(SOC) such as PAHs and pesticides.

SITE SELECTION AND SAMPLING STRATEGY

Water Sampling 

Seven water-sampling sites have been established in SWR (fig. 2) and two in LLR (fig. 3). All the 

sites within SWR, with the exception of site 6, are 

within the reservoir’s minimum fill boundary to ensure 

that water will be available for sampling throughout the 

Figure 3. Loveland Reservoir sampling sites, San Diego County, 

California. 

year. Site 6 is located at the eastern end of the reservoir 

in very shallow water. As the reservoir water level falls, 

the water depth at this site decreases and sometimes the 

bed sediments are completely exposed. When this 

happens, the sampling site is moved to a location where 

the water depth is at least 1 m deep. The water 

sampling sites at LLR are located near the discharge 

point at the dam and near the Sweetwater River inflow 

at the east end of the reservoir. Sampling sites at both 

SWR and LLR are all marked with stationery buoys 

anchored to the bottom. 

Three additional water-sampling sites (fig. 2) 

have been established outside the reservoir boundaries. 

The first site monitors the quality of the ‘finished’ 

water as it leaves the treatment plant for distribution to 

customers. The second site monitors the quality of the 

imported water before it enters the treatment plant. The 

third site, the Sweetwater River at the Low-Flow 

Diversion, monitors the quality of the watershed 

drainage water entering SWR. In most cases, imported 

water is pumped directly into the treatment plant; 

however, imported water is occasionally pumped 

directly into SWR to augment the local supply. When 

imported water is pumped directly into the reservoir, it 

significantly increases the water level, and volume 

increases on the order of tens of thousands of acre-feet. 

Imported water is never used to maintain the minimum 

pool level. All the sampling site names and 

identification numbers are given in table 1.

Baseline water sampling at both SWR and LLR 

began in September 1998 and continued at 2-month 

intervals through September 1999. This bimonthly 

sampling allowed monitoring of various operational 

Loveland Reservoir 

 east end near 

 source inlet

Loveland Reservoir 

 near dam

32o

46'

52"

32o

47'

30"

116o

47'

30"

116o

45'

0 1 KILOMETER

0 1 .5 MILE 

.5

Proposed SR-125 

 Alignment

Roads

River or pipeline
6 Water-Quality Monitoring, Sweetwater and Loveland Reservoirs, San Diego County, Calif.—Phase One Results, 1998–1999

modes of the reservoirs, such as recharge or drawdown 

events that significantly changed the water level in 

reservoirs. Before any reservoir water is sampled, 

depth profiles of temperature, pH, dissolved oxygen, 

and specific conductance are measured at 1 m intervals 

from the surface to the bottom at each sampling 

location (table 2, at back of report). At LLR, the depth 

profile measurements below 10 m are taken every 2 m 

because LLR is much deeper than SWR. If the 

temperature depth profile shows the presence of a 

thermocline, two sets of water samples are collected at 

the site—one at midepilimnion and one at 

midhypolimnion. If no thermocline is evident, only one 

sample set is collected at a point midway between the 

water surface and the reservoir bottom. 

Water samples for both pesticide and VOC 

analyses are collected using a 1.2 L (liter) Teflon 

Kemmerer sampler (Wildco, Saginaw, Mich.). 

Procedures for collecting and processing water samples 

for dissolved pesticide and VOC determinations are 

based on protocols used by the NAWQA Program 

(Shelton, 1994, 1997). Samples from the Low-Flow 

Diversion Dam are grab samples collected by 

submerging the sample bottle, removing the cap, filling 

the bottle, and recapping the bottle while still 

submerged. The finished and imported water samples 

are collected from spigots located at the distribution 

points. The water lines are flushed for 5 minutes before 

the sample bottles are filled.

Air Sampling

Air sampling at site 1 (fig. 2) began operation in 

March 1999. The site is wired for AC power (120 

volts), equipped with telephone modem access, and 

secured from the general public by a 2-m-high chainlink fence. The data collected at this station is 

establishing the occurrence, temporal patterns, and 

ambient levels of selected airborne organic compounds 

(VOCs, PAHs, and pesticides). This site was installed 

downwind of the proposed SR-125 routes and upwind 

of SWR (fig. 2) along a transect of the predominant 

wind direction. The site includes a fully instrumented 

meteorological station that records hourly averages of 

wind speed and direction, ambient air temperature and 

relative humidity at two heights, rainfall, barometric 

pressure, and atmospheric stability. The general 

considerations for establishing this air sampling station 

followed the guidelines outlined by the National 

Atmospheric Deposition Program (Bigelow, 1984). 

The first VOC air sample was collected on March 

23, 1999. The sampling methods are described in detail 

by Pankow and others (1998) and will only be briefly 

discussed. Ambient, gas phase atmospheric VOC 

concentrations are monitored using two programmable 

low-volume air sampling pumps (224-PCXR8, SKC 

Inc., Eight Four, Pa.). One sampling pump pulls about 

1.5 L of air through a glass cartridge containing 50 mg 

(milligram) of Carbotrap B in series with 280 mg of 

1Quality control identification number.

2Air sampling date located on figure 2.

Site identification number Site number Site name

324130117002501 1 Sweetwater Reservoir near pump tower

324139117000801 2 Sweetwater Reservoir near Vista del Lago station

324131117000101 3 Sweetwater Reservoir center of minimum pool

324126116595701 4 Sweetwater Reservoir near recreation area

324137116592401 5 Sweetwater Reservoir minimum pool boundary East

324209116585001 6 Sweetwater Reservoir east end reservoir fill boundary

324147116593501 7 Sweetwater Reservoir near Gum Tree Cove Pond

324703116473101* Loveland Reservoir near dam

324737116453501* Loveland Reservoir east end near source inlet

324311116565901 10 Sweetwater River at low flow diversion at Sweetwater Reservoir

324132117002701 8 Perdue Treatment Plant—finished water at Sweetwater Reservoir

324137117002901 9 Perdue Treatment Plant—imported raw water at Sweetwater Reservoir

188888801 QC/QA site for Sacramento Project Office, California

2324141117001601 Sweetwater Reservoir air sampling site

Table 1. Site identification numbers, site numbers, and corresponding site names, Sweetwater and Loveland Reservoirs, San Diego County, 

California

[See figure 2 for site locations. QA, quality assurance; QC, quality control. *, Loveland Reservoir sites on figure 3]
Analytical Methods 7

Carboxen 1000 (Supelco Inc., Bellefonte, Pa.). This 

sample is analyzed for chlorofluorocarbons and other 

compounds with low breakthrough volumes. The 

second pump pulls about 5 L of air through a glass 

cartridge containing 180 mg of Carbotrap B in series 

with 70 mg of Carboxen 1000 (Supelco Inc., Bellefonte, Pa.). This sample is analyzed for the remaining 

VOC analytes. Each sample is a 24-hour composite 

collected every 12th day. The timing of the VOC 

sample collection is coordinated with the California Air 

Resources Board Air Toxics Program. 

The first PAH, total PCB, and pesticide air 

sample was collected during the week of May 11, 

1999. Both the gas and particle phases are monitored 

using a high-volume air sampler that pulls air through a 

90-mm (millimeter)-diameter glass fiber filter (GFF), 

which collects the particle phase samples, and a primary and a secondary [4.45 cm (centimeter) diameter 

 7.62 cm each; average density = 0.043 g/m-3 (gram 

per cubic meter)] polyurethane foam (PUF) plugs, 

which collects the gas phase samples. Both the GFF 

and PUFs are contained in Teflon cartridges. The flow 

rates are maintained at approximately 100 L/min (liter 

per minute) using a high-volume vacuum pump 

(Graseby-GMW, Village of Cleves, Ohio). Each sample 

is a 24-hour/7-day weekly composite taken every third 

week. Air samples at LLR are not collected because its 

foothill location (30 km east of SWR) is considered 

sufficiently downwind of SR-125 to be minimally 

impacted by any airborne contaminants originating 

from it. 

Bed Sediment Sampling

Sediment sampling included a one-time coring 

of SWR bed sediments and an annual sampling of the 

surficial bed sediments at each water sampling site at 

both SWR and LLR. The bed sediment sampling and 

coring was in collaboration with the research group of 

Dr. Peter Van Metre, USGS, Austin, Tex., and Dr. 

Edward Callender, USGS, Reston, Va. Sediment core 

samples, when analyzed for specific organic chemicals 

and trace elements, can assist in documenting the 

history of land use and water-quality trends in a study 

area (Van Metre and Callender, 1997).

Sediment Core Sampling

Bed sediment core samples were collected using 

a Benthos gravity piston corer fitted with a plastic 

barrel (Van Metre and Callender, 1997). Two sediment 

cores (about 188 cm length  6.5 cm diameter) were 

collected from the lower part of SWR in the paleochannel of the Sweetwater River on September 24, 

1998. The sampling site was located sufficiently far 

from past aeration activities near the Sweetwater Dam 

so the core would reflect the undisturbed, natural 

sedimentation rate of the reservoir. One core was 

subsampled at 4-cm intervals for chemical analysis. 

The second core was split lengthwise and inspected for 

color, texture, odor, the presence of organic detritus and 

benthic invertebrates, and prereservoir land-surface 

identification.

Surficial Bed Sediment Sampling

Surficial bed sediment samples were collected 

using a 15  15  15 cm Ekman grab sampler (Wildco, 

Saginaw, Mich.) at the seven established water sampling sites in SWR on September 9 1998, and at both 

LLR water sampling sites on September 10, 1999. 

Each of the four URDS ponds adjacent to SWR (fig. 2) 

also was sampled on November 5, 1998. The top 1 cm 

from each of these samples was subsampled for 

analysis.

ANALYTICAL METHODS

Water 

Each water sample was analyzed at the USGS 

National Water Quality Laboratory (NWQL). Analyses 

for 87 VOCs used capillary-column gas 

chromatography/mass spectrometry (GC/MS) with 

full-scan ion monitoring, described by Connor and 

others (1998). The results for the VOC water analyses 

are given in table 3 (at back of report). The pesticide 

analyses used the method described by Zaugg and 

others (1995) and analyzes for 43 pesticides and 4 

pesticide transformation products. This method uses 

capillary-column GC/MS with selected-scan ion 

monitoring. The results for the pesticide water analyses 

are given in table 4 (at back of report). 
8 Water-Quality Monitoring, Sweetwater and Loveland Reservoirs, San Diego County, Calif.—Phase One Results, 1998–1999

Air 

The air sampling methods for VOCs, PAHs, and 

pesticides used in this monitoring program have no 

published USGS protocols and, as such, are considered 

experimental. The air sampling techniques, however, 

are based on established methods that have been 

successfully used by other research groups. They have 

also been used in several USGS studies that investigated occurrence and distribution of VOCs (Baehr and 

others, 1999a,b; Bender and others, 2000) and pesticides (Majewski and others, 1998; Foreman and others, 

2000) in the atmosphere.

The low-volume VOC air sampling and analytical methods were developed by the research group 

of Dr. James Pankow at Oregon Graduate Institute, 

Beaverton, Oregon (Pankow and others, 1998) in 

conjunction with the USGS. Air VOC analyses were 

done by Dr. Pankow’s research group. The VOC air 

samples were analyzed by adsorption/thermal 

desorption GC/MS. The method included 87 VOCs that 

ranged in volatility from CFC-12 to 1,2,3-

trichlorobenzene. Method detection limits (MDL) for 

the analytes ranged from 0.02 to 0.06 parts per billion 

by volume. The results for the VOC air analyses are 

given in tables 5A and 5B (at back of report).

The high-volume PAH and pesticide air samples 

are analyzed using a modified version of established 

NWQL analytical methods. The analytical method for 

the PAHs in the gas and particle phases, which determines 32 PAH compounds and related isomers, was 

developed for this study by the NWQL Methods 

Development Group (Foreman and others, 1995). The 

pesticide method is based on the method used to 

analyze the water samples (Zaugg and others, 1995) 

and includes the same compounds, but omits desethyl 

atrazine, and adds desisopropylatrazine. The sampling 

and analytical methods for both the PAH and pesticide 

air samples have been used in several specialized 

studies undertaken by the USGS (Foreman and others, 

1997, 2000; Majewski and others, 1998) and are 

similar to established procedures currently used by the 

NAWQA Program. PAH air analyses are not included 

in this report because they have not been completed. 

Analytical results for pesticides in air are given in 

table 6 (at back of report). 

Sediment 

The surficial bed sediment and core samples 

were all analyzed for the organic constituents at the 

NWQL using the same custom method. This modified 

USGS method (Furlong and others, 1996) analyzes for 

22 parent PAHs, 10 specific alkyl-PAH isomers, 

homologous series of 25 alkyl-PAH isomers, total 

PCBs, and 16 organochlorine (OC) insecticides. Every 

other sediment core segment to a depth of 72 cm was 

analyzed; thereafter, every third segment was analyzed. 

The results for the PAH core, surficial bed sediment, 

and URDS sample analyses are given in table 7 (at 

back of report); OC results for the same samples are 

given in table 8 (at back of report). Major and trace 

elements analyses for each surficial bed sediment and 

core sample were done by Dr. E. Callender (USGS 

National Research Program) using methods described 

in Lichte and others (1987) and Briggs (1990). Every 

other sediment core segment to a depth of 188 cm was 

analyzed, and the results are given in table 9 (at back of 

report). The cesium-137 age determinations are given 

in table 10 (at back of report). Table 11 (at back of 

report) contains the description of the visual analysis of 

the core content, color, and texture.

QUALITY CONTROL

Sampling

Three types of water sampling quality control 

were used in this study: blanks, spikes, and replicates. 

Blanks and spikes estimate result bias, and replicates 

estimate result variability. Equipment blanks demonstrate that the equipment cleaning procedures, sample 

collection procedures, and the sample processing 

equipment are not contaminating environmental 

samples. Equipment blanks are collected annually by 

processing USGS laboratory certified water, known to 

be free of the analytes of interest, through all of the 

cleaned sampling and processing equipment. 

Field blanks are collected to demonstrate that the 

sampling equipment is adequately cleaned between 

environmental sampling sites. The field blank is 

collected at an environmental sampling location by 

processing USGS laboratory certified water, known to 

be free of the analytes of interest, through all field 

cleaned sampling equipment. A spike is an 
References Cited 9

environmental sample that is fortified with a known 

concentration of selected analytes. Spiked samples are 

used to measure bias in analyte degradation, analyte 

recovery, or to test the effects of various sampling 

matrices on the analyses of specific constituent groups. 

Replicate samples are collected and processed identically to the environmental sample and used to measure the variability during sample processing and 

analysis (Mueller and others, 1997). At least one 

quality-control sample is collected during every 

sampling campaign. The type of quality-control sample 

collected and the sampling location are chosen 

randomly. The blank, spike, and replicate qualitycontrol data for the VOCs and pesticides in the water 

samples are included in tables 12 and 13 (at back of 

report), respectively, and for the PAHs and OCs in the 

surficial bed sediment samples in tables 14 and 15 (at 

back of report), respectively. 

Analytical

Quality of analytical results is monitored by 

adding surrogate compounds to each sample before it is 

processed for analysis. These surrogate compounds are 

added at the NWQL to monitor sample preparation and 

analysis. For water samples, 1,2-dichloroethane-d10, 

toluene-d8, and 1,4-bromofluorobenzene are added to 

each VOC sample, and diazinon-d6 and alpha-HCH-d6

are added to each pesticide sample. The results, in 

percentage recovery, for each water analysis are given 

in tables 3 and 4, respectively.

The air samples use a slightly different method 

for assessing the analytical method efficiency. Each 

VOC air sample collected has an associated travel 

blank, travel spike, and lab blank analyzed along with it 

(Wentai Luo, Oregon Graduate Institute, unpub. data, 

1999). Each SOC air sample is comprised of a GFF and 

a PUF extract, and these extracts are analyzed at the 

NWQL for two different classes of compounds. A 

mixture of five surrogate compounds was added to each 

sample prior to extraction. For PAH analysis, 

nitrobenzene-d5, 2-fluorobiphenyl, and terphenyl-d14

are the surrogates; for pesticide analysis, diazinon-d10

and alpha-HCH-d6 are the surrogates. The surrogate 

results, in percentage recovery, for the pesticide air 

sample analysis are given in table 6.

The quality of the bed sediment analyses was 

monitored using blank and spiked sample analyses, and 

by adding a mixture of five surrogate compounds to 

each sample prior to extraction. The compounds 

nitrobenzene-d5, 2-fluorobiphenyl, and terphenyl-d14

were the surrogates monitored during the PAH 

analyses; nonachloro-biphenyl and alpha-HCH-d6

were the surrogates monitored during the OC analyses. 

The results, in percentage recovery, for the PAH 

surrogates are given in table 7, and the OC pesticide 

surrogate results, in percentage recovery, are given in 

table 8. 

REFERENCES CITED

Baehr, A.L., Kauffman, L.J., Charles, E.G., Baker, R.J., 

Stackelberg, P.E., Ayers, M.A., and Zapecza, O.S., 

1999a, Sampling throughout the hydrologic cycle to 

characterize sources of volatile organic compounds in 

ground water, in Morganwalp, D.W., and Buxton, H.T., 

eds., Subsurface contamination from point sources, v. 3 

of U.S. Geological Survey Toxic Substances Hydrology 

Program—Proceedings of the technical meeting, 

Charleston, South Carolina, March 8–12, 1999: U.S. 

Geological Survey Water-Resources Investigations 

Report 99-4018C, p. 21–36.

Baehr, A.L., Stackelberg, P.E., and Baker, R.J., 1999b, 

Evaluation of the atmosphere as a source of volatile 

organic compounds in shallow groundwater: Water 

Resources Research, v. 35, no. 1, p. 127–136.

Bender, D.A., Zogorski, J.S., Luo, Wentai., Pankow, J.F., 

Majewski, M.S., and Baker, R.J., 2000, Atmosphericwater interaction of chloroform, toluene, and MTBE in 

small perennial urban streams, in proceedings of the 

93rd Annual Air and Waste Management Association 

Conference, Salt Lake City, UT.

Bigelow, D.S., 1984, Instruction manual: NADP/NTN Site 

Selection and Installation: Fort Collins, Colo., Colorado 

State University, Natural Resource Ecology Laboratory, 

variously paged [available from NADP Program Office, 

Illinois State Water Survey, 2204 Griffith Drive, 

Champaign IL 61820-7495].

Briggs, P., 1990, Elemental analysis of geological material 

by inductively coupled plasma-atomic emission 

spectrometry, in Arbogast, B.F., ed., Quality assurance 

manual for the branch of geochemistry: U.S. Geological 

Survey Open-File Report 90-668, 184 p.

California Environmental Protection Agency, 1986, 

California Safe Drinking Water and Toxic Enforcement 

Act of 1986 (Proposition 65): Health and Safety Code, 

division 20, chap. 6.6, sect. 25249.5 through 25249.13.

California Department of Transportation, 2001, State Route 

125 (From SR-905 to State Route 54): District 11 Fact 

Sheet, accessed December 14, 2001, at URL 

<http://www.dot.ca.gov/dist11/facts/125toll.htm>.
10 Water-Quality Monitoring, Sweetwater and Loveland Reservoirs, San Diego County, Calif.—Phase One Results, 1998–1999

Connor, B.F., Rose, D.L., Noriega, M.C., Murtagh, L.K., and 

Abney, S.R., 1998, Methods of analysis by the U.S. 

Geological Survey National Water Quality 

Laboratory—Determination of 86 volatile organic 

compounds in water by gas chromatography/mass 

spectrometry, including detections less than reporting 

limits: U.S. Geological Survey Open-File Report 

97-829, 78 p.

Foreman, W.T., Connor, B.F., Furlong, E.T., Vaught, D.G., 

and Merten, L.M., 1995, Methods of analysis by the 

U.S. Geological Survey National Water Quality 

Laboratory—Determination of organochlorine 

pesticides and polychlorinated biphenyls in bottom 

sediment by dual capillary-column gas chromatography 

with electron-capture detection: Open-File Report 

95-0140, 78 p.

Foreman, W.T., Goolsby, D.A., Majewski, M.S., Wiebe, 

F.W., and Battaglin, W.A., 1997, Acetochlor and other 

herbicides in air and rain in the Midwestern United 

States [abs.], in Bridging the global environment: 

Technology, communication, and education: Society of 

Environmental Toxicology and Chemistry Annual 

Meeting, 18th, San Francisco, Calif., November 16–20, 

1997, Abstract Book, no. 229, p. 45.

Foreman, W.T., Majewski, M.S., Goolsby, D.A., Wiebe, 

F.W., and Coupe, R.H., 2000, Pesticides in the 

atmosphere of the Mississippi River Valley, Part II—

Air: Science of the Total Environment, v. 248, no. 2–3, 

p. 213–226.

Furlong, E. T., Vaught, D. G., Merten, L. M., Foreman, W. T., 

and Gates, P. M., 1996, Methods of analysis by the U.S. 

Geological Survey National Water Quality 

Laboratory—Determination of semivolatile organic 

compounds in bottom sediment by solvent extraction, 

gel permeation chromatographic fractionation, and 

capillary-column gas chromatography/mass 

spectrometry: Open-File Report 95-0719, 67 p.

Lichte, F.E., Golightly, D.W., and Lamothe, O.J., 1987, 

Inductively coupled plasma-atomic emission 

spectrometry, in Baedecker, P.A., ed., Methods for 

geochemical analysis: U.S. Geological Survey Bulletin 

1770, p. B1-B10.

Majewski, M.S., Foreman, W.T., Goolsby, D.A., and 

Nakagaki, Naomi, 1998, Airborne pesticide residues 

along the Mississippi River: Environmental Science and 

Technology, v. 32, no. 23, p. 3689–3698.

Mueller, D.K., Martin, J.D., and Lopes, T.J., 1997, Qualitycontrol design for surface-water sampling in the 

National Water-Quality Assessment Program: U.S. 

Geological Survey Open-File Report 97-223, 17 p.

Ogden Environmental and Energy Services, 1997, SR-125 

South route alternatives: Potential air emissions impact 

on Sweetwater Reservoir: San Diego, Calif. [available 

from Sweetwater Authority, 505 Garrett Avenue, Chula 

Vista, CA 92912].

Pankow, J.F., Luo, Wentai, Isabelle, L.M., Bender, D.A., and 

Baker, R.J., 1998, Determination of a wide range of 

volatile organic compounds in ambient air using 

multisorbent adsorption/thermal desorption and gas 

chromatography/mass spectrometry: Analytical 

Chemistry, v. 70, no. 24. p. 5213–5221.

Shelton, L.R., 1994, Field guide for collecting and 

processing stream-water samples for the National 

Water-Quality Assessment Program: U.S. Geological 

Survey Open-File Report 94-455, 42 p.

———1997, Field guide for collecting samples for analysis 

of volatile organic compounds in stream water for the 

National Water-Quality Assessment Program: U.S. 

Geological Survey Open-File Report 97-401, 14 p.

Van Metre, P.C., and Callender, Edward, 1997, Water-quality 

trends in White Rock Creek Basin from 1912–1994 

identified using sediment cores from White Rock Lake 

reservoir, Dallas, Texas: Journal of Paleolimnology, 

v. 17, p. 239.

Zaugg, S.D., Sandstrom, M.W., Smith, S.G., and Fehlberg, 

K.M., 1995, Methods of analysis by the U.S. 

Geological Survey National Water Quality 

Laboratory—Determination of pesticides in water by 

C-18 solid-phase extraction and capillary-column gas 

chromatography/mass spectrometry with selected-ion 

monitoring: U.S. Geological Survey Open-File Report 

95-181, 49 p.
Table 2 11

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Sweetwater Reservoir near pump tower:

September 9, 1998 1525 1.0 6.9 8.3 783 26.8

1526 2.0 7.0 8.4 783 26.6

1527 3.0 6.3 8.3 785 26.4

1528 4.0 4.5 8.0 783 26.0

1529 5.0 0.8 7.6 772 25.3

1530 6.0 0.2 7.5 749 23.1

1531 7.0 0.1 7.4 746 22.5

1532 8.0 0.1 7.3 738 21.5

1533 9.0 0.1 7.3 741 20.6

1534 10.0 0.1 7.3 749 19.2

1535 11.0 0.1 7.3 763 18.0

1536 12.0 0.1 7.3 770 17.7

1537 13.0 0.1 7.2 775 17.6

1538 14.0 0.1 7.2 776 17.5

1539 15.0 0.1 7.2 778 17.5

1540 16.0 0.1 7.2 1,040 17.5

November 3,1998 1318 0.1 6.1 — 794 19.6

1319 1.0 6.4 — 804 19.4

1320 2.0 6.2 — 808 19.3

1321 3.0 6.1 — 808 19.2

1322 4.0 5.9 — 808 19.2

1323 5.0 5.9 — 809 19.2

1324 6.0 5.9 — 810 19.2

1325 7.0 5.9 — 810 19.1

1326 8.0 5.8 — 810 19.1

1327 9.0 5.8 — 806 19.1

1328 10.0 5.8 — 805 19.1

1329 11.0 5.8 — 805 19.1

1330 12.0 5.7 — 806 19.1

1331 13.0 5.7 — 805 19.1

1332 14.0 5.7 — 805 19.1

1333 15.0 5.7 — 805 19.1

January 6, 1999 1000 0.1 8.7 7.8 847 12.1

1001 1.0 8.6 7.9 848 12.0

1002 2.0 8.6 7.9 849 12.0

1003 3.0 8.6 7.9 850 12.0

1004 4.0 8.6 7.9 851 11.9

1005 5.0 8.6 7.9 851 11.9

1006 6.0 8.6 7.9 851 11.9

1007 7.0 8.5 7.9 852 11.9

1008 8.0 8.6 7.9 852 11.9

1009 9.0 8.5 7.9 852 11.9

1010 10.0 8.4 7.9 853 11.9

1011 11.0 8.3 7.9 854 11.9

1012 12.0 7.8 7.9 854 11.9

1013 13.0 7.8 7.9 855 11.9

1014 13.6 7.4 7.9 860 11.9

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California 

[Time is denoted in 24-hour scale. PCODE, parameter code; m, meter; mg/L, milligram per liter; μS/cm, microsiemen per

centimeter; °C, degree Celsius; —, no data]
12 Table 2

March 1, 1999 1000 0.1 11.5 8.9 773 16.1

1001 1.0 12.1 8.8 758 15.3

1002 2.0 12.2 8.7 760 15.1

1003 3.0 12.1 8.7 760 14.9

1004 4.0 8.5 8.2 759 13.6

1005 5.0 7.3 8.1 757 13.3

1006 6.0 6.4 8.0 755 13.1

1007 7.0 5.8 7.8 752 12.8

1008 8.0 5.6 7.8 752 12.8

1009 9.0 5.8 7.9 751 12.7

1010 10.0 5.8 7.8 749 12.6

1011 11.0 5.2 7.8 749 12.5

1012 12.0 4.8 7.7 749 12.4

1013 14.0 4.7 7.7 749 12.4

1014 15.0 3.9 7.7 750 12.4

1015 16.0 3.8 7.7 750 12.4

1016 16.5 0.4 8.2 963 12.6

May 3, 1999 1055 0.1 9.1 8.3 795 17.3

1056 1.0 9.1 8.5 797 17.2

1057 2.0 9.1 8.3 797 17.2

1058 3.0 9.0 8.3 797 17.2

1059 4.0 9.0 8.3 797 17.2

July 12, 1999 1055 0.1 7.9 8.3 874 26.3

1056 1.0 7.9 8.4 874 26.2

1057 2.0 7.9 8.3 873 25.7

1058 3.0 7.8 8.3 873 25.6

1059 4.0 7.7 8.3 872 25.4

September 20, 1999 1120 0.1 5.9 8.0 864 23.3

1121 1.0 5.7 8.0 882 22.9

1122 2.0 5.6 8.0 892 22.7

1123 3.0 5.4 8.0 894 22.5

1124 4.0 5.4 8.1 907 22.4

1125 5.0 5.2 8.0 910 22.4

1126 6.0 5.2 8.0 917 22.4

1127 7.0 5.1 8.0 921 22.4

1128 8.0 2.0 7.6 889 20.7

1129 9.0 1.1 7.5 860 19.2

1130 10.0 0.6 7.4 855 18.2

1131 11.0 0.4 7.3 858 17.2

Sweetwater Reservoir near Vista del Lago station:

September 10, 1998 0835 1.0 6.5 8.5 783 26.4

0836 2.0 6.5 8.5 784 26.4

0837 3.0 6.5 8.5 784 26.4

0838 4.0 6.5 8.5 783 26.4

0839 5.0 6.4 8.5 781 26.4

0840 6.0 2.3 8.0 771 25.5

0841 7.0 0.3 7.6 741 22.2

0842 8.0 0.2 7.5 739 20.5

0843 9.0 0.2 7.4 742 19.9

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 13

0844 10.0 0.2 7.4 745 19.4

0846 11.0 0.2 7.4 751 18.6

November 3, 1998 1131 1.0 5.8 — 788 19.5

1132 2.0 5.8 — 790 19.4

1133 3.0 5.7 — 791 19.3

1134 4.0 5.5 — 794 19.3

1135 5.0 5.5 — 793 19.3

1136 6.0 5.5 — 794 19.3

1137 7.0 5.4 — 795 19.3

1138 8.0 5.4 — 795 19.2

1139 9.0 5.4 — 796 19.2

1140 10.0 5.4 — 796 19.2

January 6, 1999 1055 0.1 8.8 8.2 852 12.4

1056 1.0 8.6 8.2 850 12.0

1057 2.0 8.3 8.1 851 11.9

1058 3.0 8.0 8.1 852 11.9

1059 4.0 8.2 8.1 852 11.9

1100 5.0 8.4 8.2 852 11.9

1101 6.0 8.4 8.2 853 11.9

1102 7.0 8.4 8.2 852 11.9

1103 8.0 8.3 8.1 853 11.9

1104 9.0 8.5 8.2 853 11.9

March 1, 1999 1059 0.1 11.8 8.8 753 16.8

1101 1.0 12.0 8.8 753 15.6

1102 2.0 11.9 8.9 771 15.3

1103 3.0 11.9 8.8 770 15.3

1104 4.0 11.9 8.8 769 15.3

1105 5.0 11.1 8.7 766 14.7

1106 6.0 7.5 8.2 756 13.7

1107 7.0 6.5 8.1 757 13.3

1108 8.0 5.3 8.0 753 12.9

1109 9.0 5.0 7.9 752 12.8

1110 10.0 5.1 7.9 752 12.7

1111 11.0 4.6 7.9 749 12.6

1112 12.0 4.3 7.8 749 12.5

May 3, 1999 1144 0.1 9.2 8.4 795 17.4

1145 1.0 9.3 8.4 795 17.4

1146 2.0 9.3 8.4 795 17.4

1147 3.0 9.3 8.4 796 17.4

1148 4.0 9.2 8.3 796 17.2

1149 5.0 9.0 8.3 796 17.1

1151 6.0 8.7 8.3 795 17.1

1152 7.0 5.2 7.8 781 16.2

1153 8.0 2.9 7.6 771 15.3

1154 9.0 1.9 7.6 769 15.2

1155 10.0 1.4 7.5 768 15.0

1156 11.0 0.8 7.5 767 14.8

1157 11.1 0.8 7.5 767 14.8

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
14 Table 2

July 12, 1999 1145 0.1 7.7 8.5 873 26.6

1146 1.0 7.8 8.5 875 26.5

1147 2.0 7.8 8.5 876 26.2

1148 3.0 7.7 8.5 876 25.9

1149 4.0 6.0 8.0 835 24.5

1150 5.0 2.0 7.9 842 22.5

1151 6.0 0.7 7.8 829 21.5

1152 7.0 0.3 7.8 830 21.1

1153 8.0 0.2 7.8 796 19.6

1154 9.0 0.2 7.9 797 17.3

1155 10.0 0.2 7.9 794 16.6

Sweetwater Reservoir center of minimum pool:

September 9, 1998 1616 1.0 7.3 8.5 782 27.0

1617 2.0 7.4 8.5 782 26.9

1618 3.0 7.4 8.5 783 26.8

1619 4.0 6.3 8.4 782 26.3

1620 5.0 1.2 7.7 766 25.2

1621 6.0 0.7 7.6 753 24.3

1622 7.0 0.4 7.5 747 22.9

1623 8.0 0.3 7.5 740 21.6

1624 9.0 0.2 7.4 745 20.0

1625 10.0 0.2 7.3 749 19.0

1626 11.0 0.2 7.3 756 18.3

1627 12.0 0.2 7.3 764 17.9

1628 13.0 0.2 7.3 768 17.7

1629 14.0 0.2 7.3 770 17.7

1631 15.0 0.1 7.3 769 17.7

1632 16.0 0.1 7.3 777 17.5

1633 17.0 0.1 7.1 810 17.5

November 3, 1998 1355 0.1 6.4 — 787 20.7

1356 1.0 6.0 — 786 19.6

1357 2.0 5.8 — 787 19.3

1358 3.0 5.8 — 788 19.2

1359 4.0 5.7 — 789 19.2

1400 5.0 5.7 — 790 19.2

1401 6.0 5.6 — 790 19.2

1402 7.0 5.6 — 791 19.2

1403 8.0 5.5 — 792 19.2

1404 9.0 5.5 — 793 19.2

1405 10.0 5.5 — 793 19.1

1406 11.0 5.5 — 793 19.1

1407 12.0 5.5 — 794 19.1

1408 13.0 5.5 — 794 19.1

1409 14.0 5.6 — 794 19.1

1410 15.0 5.5 — 795 19.1

January 6, 1999 1122 0.1 8.8 8.2 854 12.7

1123 1.0 8.8 8.2 851 12.1

1124 2.0 8.6 8.1 852 12.0

1125 3.0 8.4 8.2 853 12.0

1126 4.0 8.3 8.1 853 12.0

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 15

1127 5.0 8.3 8.1 853 12.0

1128 6.0 8.2 8.1 853 12.0

1129 7.0 8.2 8.1 854 12.0

1130 8.0 7.9 8.1 855 11.9

1131 9.0 7.7 8.1 855 11.9

1132 10.0 7.7 8.1 855 11.9

1133 11.0 7.6 8.1 856 11.9

1134 12.0 7.6 8.1 856 11.9

1135 13.0 7.5 8.1 857 11.9

1136 14.0 6.5 7.9 864 11.9

March 1, 1999 1113 0.1 11.9 8.8 776 16.7

1114 1.0 11.9 8.8 775 16.7

1115 2.0 12.0 8.8 770 15.8

1116 3.0 11.9 8.8 768 15.2

1117 4.0 11.8 8.8 768 15.2

1118 5.0 11.9 8.7 767 15.1

1119 6.0 11.2 8.7 760 14.8

1120 7.0 7.4 8.2 758 13.5

1121 8.0 6.7 8.1 757 13.3

1122 9.0 6.1 8.0 750 12.9

1123 10.0 5.6 8.0 752 12.8

1124 11.0 5.0 7.9 748 12.7

1125 12.0 5.3 7.9 750 12.6

1126 13.0 5.4 7.9 749 12.5

1127 14.0 5.4 7.9 748 12.5

1128 15.0 5.3 7.9 748 12.4

1129 16.0 5.2 7.8 749 12.4

1130 17.0 3.5 7.8 749 12.4

May 3, 1999 1220 0.1 9.2 8.4 794 17.3

1221 1.0 9.3 8.4 795 17.3

1222 2.0 9.4 8.3 795 17.3

1223 3.0 9.4 8.3 795 17.2

1224 4.0 9.3 8.3 795 17.2

1225 5.0 9.3 8.3 795 17.2

1226 6.0 8.3 8.2 793 17.0

1227 7.0 3.6 7.6 771 15.4

1228 8.0 2.9 7.6 771 15.3

1229 9.0 2.2 7.6 770 15.1

1230 10.0 2.1 7.5 769 15.0

1231 11.0 2.0 7.5 768 15.0

1232 12.0 1.5 7.5 767 14.9

1233 13.0 0.4 7.5 765 14.7

1234 14.0 0.3 7.5 766 14.7

1235 15.0 0.2 7.5 767 14.7

1237 16.0 0.2 7.5 767 14.6

1238 16.5 0.2 7.5 773 14.6

July 12, 1999 1220 0.1 7.5 8.5 874 26.3

1221 0.1 7.6 8.5 875 26.2

1222 1.0 7.7 8.6 875 26.2

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
16 Table 2

1223 2.0 7.8 8.6 875 26.2

1224 3.0 7.4 8.3 862 25.5

1225 4.0 6.4 8.2 823 24.6

1226 5.0 1.8 7.9 845 22.6

1227 6.0 0.7 7.8 831 21.8

1228 7.0 0.3 7.8 811 20.9

1229 8.0 0.2 7.8 807 18.9

1230 9.0 0.2 7.9 797 17.8

1231 10.0 0.2 7.9 793 16.6

1232 11.0 0.2 7.9 795 16.4

1233 12.0 0.1 7.9 795 16.3

1234 13.0 0.1 7.8 797 16.1

1235 14.0 0.1 7.8 799 16.1

September 20, 1999 1200 0.1 7.4 8.2 903 23.6

1201 1.0 7.2 8.2 905 23.0

1202 2.0 7.0 8.2 911 22.6

1203 3.0 6.8 8.2 913 22.6

1204 4.0 6.6 8.2 916 22.5

1205 5.0 6.3 8.1 920 22.4

1206 6.0 6.3 8.1 929 22.4

1207 7.0 6.6 8.2 932 20.5

1208 8.0 2.0 7.7 888 19.1

1209 9.0 0.9 7.5 864 17.9

1210 10.0 0.7 7.4 858 17.9

1211 11.0 0.5 7.3 859 17.3

Sweetwater Reservoir near recreation area:

September 10, 1998 0951 1.0 6.8 8.5 782 26.5

0952 2.0 6.7 8.5 780 26.5

0953 3.0 6.7 8.5 782 26.4

0954 4.0 6.5 8.5 783 26.3

0955 5.0 6.4 8.5 783 26.2

0956 6.0 4.0 8.2 780 26.0

0957 7.0 0.4 7.7 741 22.6

0958 8.0 0.2 7.6 736 20.9

0959 9.0 0.2 7.5 742 19.8

1000 10.0 0.2 7.4 746 19.2

1001 11.0 0.2 7.4 749 18.6

1002 12.0 0.2 7.4 753 18.4

1003 13.0 0.1 7.4 758 18.1

1004 14.0 0.2 7.4 766 17.8

1005 15.0 0.1 7.3 770 17.6

November 3, 1998 1105 0.1 6.1 — 789 20.7

1106 1.0 5.9 — 786 19.6

1107 2.0 5.8 — 787 19.3

1108 3.0 5.7 — 787 19.3

1109 4.0 5.6 — 788 19.2

1110 5.0 5.7 — 789 19.2

1111 6.0 5.6 — 790 19.2

1112 7.0 5.6 — 790 19.1

1113 8.0 5.6 — 791 19.1

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 17

1114 9.0 5.6 — 791 19.1

1115 10.0 5.6 — 792 19.1

1116 11.0 5.6 — 792 19.1

1117 12.0 5.6 — 792 19.1

1118 13.0 5.5 — 792 19.1

1119 14.0 5.4 — 793 19.1

January 6, 1999 1150 0.1 8.7 8.2 854 13.1

1151 1.0 8.5 8.2 852 12.1

1152 2.0 8.4 8.1 852 12.0

1153 3.0 8.3 8.1 839 12.0

1154 4.0 8.3 8.1 853 12.0

1155 5.0 8.2 8.1 853 12.0

1156 6.0 8.1 8.1 854 12.0

1157 7.0 8.0 8.1 854 12.0

1158 8.0 7.9 8.1 855 11.9

1159 9.0 7.8 8.1 855 11.9

March 1, 1999 1200 0.1 11.5 8.9 775 16.1

1201 1.0 11.6 8.4 769 15.9

1202 2.0 11.6 8.9 766 15.3

1203 3.0 11.6 8.9 763 15.1

1204 4.0 11.7 8.8 765 15.0

1205 5.0 10.3 8.7 762 14.4

1206 6.0 6.6 8.2 758 13.4

1207 7.0 6.3 8.1 758 13.3

1208 8.0 5.9 8.1 754 12.9

1209 9.0 5.4 8.0 751 12.7

1210 10.0 5.3 8.0 750 12.5

1211 11.0 5.2 8.0 749 12.5

1212 12.0 5.4 8.0 748 12.4

1213 13.0 4.7 7.9 749 12.4

1214 14.0 4.4 7.9 749 12.4

1215 15.0 3.8 7.8 749 12.4

1216 16.0 3.7 7.9 750 12.4

May 3, 1999 1300 0.1 8.9 8.3 793 17.2

1301 1.0 9.0 8.3 794 17.2

1302 2.0 9.1 8.3 795 17.2

1303 3.0 9.1 8.3 795 17.2

1304 4.0 9.0 8.3 795 17.2

1305 5.0 8.9 8.3 795 17.1

1306 6.0 8.7 8.0 778 16.3

1307 7.0 4.9 7.8 774 16.1

1308 8.0 3.0 7.6 771 15.2

1309 9.0 2.4 7.5 769 15.2

1311 10.0 1.8 7.5 768 15.0

1312 11.0 1.1 7.5 766 14.8

1313 12.0 0.4 7.4 766 14.7

1314 13.0 0.2 7.5 767 14.6

1315 14.0 0.2 7.5 767 14.6

1316 15.0 0.2 7.4 769 14.6

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
18 Table 2

July 12, 1999 1300 0.1 7.1 8.4 874 26.4

1301 1.0 7.3 8.5 874 26.3

1302 2.0 7.4 8.5 875 26.2

1303 3.0 7.2 8.4 869 25.6

1304 4.0 7.2 8.4 872 25.3

1305 5.0 1.6 7.8 822 22.5

1306 6.0 0.7 7.7 829 21.5

1307 7.0 0.3 7.7 826 20.9

1308 8.0 0.2 7.7 799 18.6

1309 9.0 0.2 7.8 801 17.8

1310 10.0 0.1 7.8 795 16.6

1311 11.0 0.1 7.8 795 16.4

1312 12.0 0.1 7.8 797 16.4

1313 13.0 0.1 7.6 798 16.1

Sweetwater Reservoir minimum pool boundary East:

September 10, 1998 1220 1.0 7.4 8.5 779 27.8

1221 2.0 7.0 8.4 781 27.2

1222 3.0 6.7 8.4 781 27.0

1223 4.0 6.9 8.4 780 26.6

1224 5.0 6.2 8.3 781 26.2

1225 6.0 0.4 7.7 760 25.1

1226 7.0 0.3 7.6 746 23.4

1227 8.0 0.2 7.5 737 21.1

1228 9.0 0.2 7.4 741 19.8

1229 10.0 0.2 7.4 749 18.7

1230 11.0 0.2 7.3 753 18.4

1231 12.0 0.2 7.3 758 18.1

1232 13.0 0.2 7.3 768 17.7

November 3, 1998 1202 0.1 5.8 — 788 20.2

1203 1.0 5.7 — 789 20.2

1204 2.0 5.5 — 788 19.7

1205 3.0 5.4 — 789 19.4

1206 4.0 5.4 — 790 19.4

1207 5.0 5.4 — 790 19.3

1208 6.0 5.4 — 791 19.3

1209 7.0 5.4 — 791 19.3

1210 8.0 5.4 — 792 19.3

1211 9.0 5.3 — 793 19.3

1212 10.0 5.1 — 793 19.2

1213 11.0 5.1 — 793 19.2

1214 12.0 5.1 — 793 19.2

January 6, 1999 1325 0.1 10.5 8.4 853 13.5

1326 1.0 9.7 8.2 852 12.3

1327 2.0 9.2 8.2 852 12.2

1328 3.0 8.9 8.3 852 12.1

1329 4.0 8.8 8.2 853 12.1

1330 5.0 8.6 8.2 855 12.1

1331 6.0 8.1 8.1 858 12.0

1332 7.0 7.9 8.1 858 12.0

1333 8.0 7.8 8.1 858 11.9

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 19

1334 9.0 7.7 8.1 860 11.9

1335 10.0 7.5 8.1 862 11.9

1336 11.0 6.4 8.1 873 11.9

March 2, 1999 1325 0.1 11.6 8.8 751 15.6

1326 1.0 11.9 8.8 764 15.6

1327 2.0 11.9 8.8 764 15.5

1328 3.0 11.8 8.9 758 15.3

1329 4.0 11.3 8.8 758 14.8

1330 5.0 8.4 8.4 757 14.0

1331 6.0 6.8 8.2 754 13.5

1332 7.0 6.0 8.1 755 13.2

1333 8.0 6.0 8.1 750 13.2

1334 9.0 5.6 8.0 750 12.8

1335 10.0 5.5 8.0 749 12.8

1336 11.0 5.2 8.0 749 12.7

1337 12.0 4.6 7.9 747 12.5

1338 13.0 4.5 7.9 747 12.5

1339 13.5 4.2 8.1 747 12.5

May 3, 1999 1335 0.1 9.2 8.3 800 17.9

1336 1.0 9.3 8.3 800 17.9

1337 2.0 9.4 8.3 800 17.9

1338 3.0 9.4 8.3 800 17.9

1339 4.0 9.4 8.3 799 17.9

1340 5.0 9.3 8.3 799 17.8

1341 6.0 9.2 8.2 798 17.8

1342 7.0 8.0 8.1 796 17.2

1343 8.0 7.0 8.0 790 16.8

1344 9.0 4.8 7.6 775 16.1

1345 10.0 3.6 7.6 776 15.8

1346 11.0 3.3 7.6 777 15.7

1347 12.0 2.7 7.5 772 15.6

1348 13.0 1.1 7.4 770 15.1

July 12, 1999 1335 0.1 7.3 8.6 880 27.1

1336 1.0 7.4 8.6 879 27.1

1337 2.0 7.5 8.7 878 27.1

1338 3.0 7.5 8.7 878 27.1

1339 4.0 7.4 8.6 864 26.7

1340 5.0 7.2 8.6 873 25.1

1341 6.0 6.0 8.1 850 24.4

1342 7.0 3.3 8.0 808 22.8

1343 8.0 1.5 7.9 823 20.6

1344 9.0 1.0 7.9 805 18.5

1345 10.0 0.8 7.9 797 17.4

1346 11.0 0.7 7.9 794 17.2

1347 11.2 0.4 7.9 796 16.6

Sweetwater Reservoir east end reservoir fill boundary:

September 10, 1998 1300 1.0 7.5 8.6 786 27.8

1301 2.0 7.2 8.6 786 27.6

1302 3.0 6.3 8.4 788 27.2

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
20 Table 2

1303 4.0 3.8 8.2 776 26.3

1304 5.0 0.3 7.8 762 25.2

November 3, 1998 1333 0.1 5.5 — 789 20.1

1334 1.0 5.5 — 791 20.1

1335 2.0 5.5 — 792 20.0

1336 3.0 5.5 — 797 19.7

January 6, 1999 1352 0.1 10.6 8.4 853 13.8

1353 1.0 8.6 8.2 853 12.1

1354 2.0 8.3 8.1 857 12.0

1355 2.3 8.2 8.2 857 12.0

March 1, 1999 1233 0.1 12.0 9.2 774 16.9

1234 1.0 12.1 8.9 769 16.6

1235 2.0 12.5 8.9 770 15.8

1236 3.0 11.4 8.7 760 14.8

1237 4.0 10.1 8.7 760 14.3

1238 5.0 8.0 8.4 759 14.0

1239 5.7 12.1 8.9 769 16.9

May 3, 1999 1430 0.1 9.2 8.4 812 18.6

1431 1.0 9.3 8.4 816 18.6

1432 2.0 9.4 8.3 816 18.6

1433 3.0 9.3 8.3 815 18.6

1434 4.0 9.4 8.4 815 18.6

1435 4.7 9.3 8.3 812 18.6

July 12, 1999 1430 0.1 7.4 8.4 892 28.2

1431 1.0 7.6 8.4 898 28.1

1432 2.0 7.4 8.4 890 27.9

September 20, 1999 1240 0.1 8.4 8.3 910 24.2

1241 0.5 8.3 8.3 913 24.2

Sweetwater Reservoir near Gum Tree Cove Pond:

September 10, 1998 0910 1.0 6.3 8.5 785 26.8

0911 2.0 6.3 8.5 784 26.8

0912 3.0 6.3 8.5 784 26.8

0913 4.0 6.3 8.5 784 26.9

0914 5.0 5.6 8.4 781 26.6

0915 6.0 0.2 7.7 758 24.6

0916 7.0 0.2 7.6 743 22.8

0917 8.0 0.5 7.5 738 21.1

0918 9.0 0.2 7.4 743 19.8

0919 10.0 0.2 7.4 750 19.0

0920 11.0 0.2 7.4 756 18.3

0921 12.0 0.2 7.4 766 17.9

0922 13.0 0.2 7.3 769 17.7

November 3, 1998 1423 0.1 5.9 — 787 20.1

1424 1.0 5.8 — 789 20.0

1425 2.0 5.6 — 788 19.8

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 21

1426 3.0 5.4 — 790 19.2

1427 4.0 5.3 — 790 19.4

1428 5.0 5.2 — 792 19.4

1429 6.0 5.1 — 792 19.4

1430 7.0 5.1 — 793 19.4

1431 8.0 5.1 — 794 19.3

1432 9.0 5.1 — 795 19.3

1433 10.0 4.9 — 795 19.2

1434 11.0 5.0 — 796 19.1

1435 12.0 5.0 — 796 19.1

January 6, 1999 1414 0.1 11.8 8.5 858 13.7

1415 1.0 9.2 8.3 855 12.3

1416 2.0 8.9 8.2 856 12.2

1417 3.0 8.8 8.3 856 12.2

1418 4.0 8.8 8.2 856 12.2

1419 5.0 8.7 8.1 857 12.1

1420 6.0 8.5 8.2 859 12.1

1421 7.0 8.4 8.2 1,120 12.0

1422 8.0 8.5 8.2 1,150 12.0

1423 9.0 8.4 8.1 1,160 11.7

1424 10.0 8.4 8.1 1,180 11.7

1425 10.1 8.3 8.2 1,190 11.7

March 1, 1999 1300 0.1 12.2 8.9 774 16.8

1301 1.0 12.5 8.9 772 16.6

1302 2.0 13.0 9.1 775 15.8

1303 3.0 12.0 8.8 771 15.4

1304 4.0 11.4 8.8 773 15.2

1305 5.0 9.8 8.7 768 14.7

1306 6.0 8.0 8.3 761 13.8

1307 7.0 5.8 8.1 757 13.2

1308 8.0 5.0 8.0 754 12.9

1309 9.0 4.7 8.0 753 12.7

1311 10.0 4.6 7.9 752 12.7

1312 11.0 4.3 7.9 751 12.6

1313 12.0 4.0 7.9 751 12.5

1314 13.0 3.8 7.9 751 12.5

1315 13.3 2.5 7.9 751 12.5

May 3, 1999 1445 0.1 9.1 8.4 798 17.8

1446 1.0 9.2 8.3 799 17.8

1447 2.0 9.3 8.3 799 17.8

1448 3.0 9.3 8.3 799 17.8

1449 4.0 9.3 8.3 799 17.8

1450 5.0 9.0 8.3 799 17.7

1451 6.0 8.1 8.1 795 17.1

1452 7.0 6.7 8.0 789 16.7

1453 8.0 5.0 7.8 782 16.2

1454 9.0 4.4 7.7 781 16.1

1455 10.0 3.5 7.6 778 15.8

1456 11.0 1.6 7.6 772 15.3

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
22 Table 2

July 12, 1999 1455 0.1 7.5 8.5 878 27.1

1456 1.0 7.6 8.5 878 27.1

1457 2.0 7.7 8.5 872 27.0

1458 3.0 7.6 8.5 868 26.2

1459 4.0 6.6 8.3 871 24.9

Loveland Reservoir near dam:

September 10, 1998 1540 1.0 7.8 8.7 409 27.0

1541 2.0 7.8 8.7 409 26.3

1542 4.0 7.8 8.7 409 26.1

1543 6.0 1.8 7.9 367 23.2

1544 8.0 0.5 7.7 334 17.0

1545 10.0 0.4 7.7 322 14.3

1546 12.0 0.2 7.6 325 12.7

1547 14.0 0.3 7.5 331 12.0

1548 16.0 0.3 7.5 343 12.1

1549 18.0 0.3 7.5 343 11.6

1550 20.0 0.3 7.5 339 11.5

1551 22.0 0.5 7.5 342 11.4

1552 24.0 0.7 7.5 341 11.4

1553 26.0 0.6 7.4 341 11.3

1554 28.0 0.7 7.4 340 11.3

1555 30.0 0.6 7.4 341 11.3

1556 32.0 0.6 7.4 341 11.3

1557 34.0 0.5 7.4 340 11.3

1558 36.0 0.5 7.4 340 11.3

1559 38.0 0.7 7.4 342 11.3

1600 40.0 0.8 7.4 344 11.3

1601 42.0 0.4 7.4 348 11.3

1602 44.0 0.2 7.3 382 11.3

1603 46.0 0.2 7.3 400 11.4

1604 48.0 0.2 7.3 405 11.4

1605 50.0 0.1 7.3 409 11.4

November 4, 1998 0825 0.1 7.9 — 390 17.6

0826 1.0 8.0 — 389 17.5

0827 2.0 8.0 — 388 17.3

0828 3.0 7.9 — 387 17.2

0829 4.0 7.8 — 388 17.2

0830 5.0 7.8 — 387 17.2

0831 6.0 7.8 — 388 17.2

0832 7.0 7.8 — 387 17.2

0833 8.0 7.7 — 388 17.1

0834 9.0 7.7 — 386 17.1

0835 10.0 7.7 — 386 17.1

0836 11.0 3.3 — 341 15.9

0837 12.0 1.3 — 304 13.2

0838 13.0 0.7 — 304 12.3

0839 14.0 0.4 — 306 12.0

0840 16.0 0.3 — 315 11.7

0841 18.0 0.2 — 316 11.5

0842 20.0 0.2 — 315 11.4

0843 22.0 0.2 — 314 11.4

0844 24.0 0.2 — 313 11.3

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 23

0845 26.0 0.1 — 315 11.3

0846 28.0 0.1 — 314 11.3

0847 30.0 0.1 — 313 11.3

0848 32.0 0.1 — 313 11.3

0849 34.0 0.1 — 313 11.3

0850 36.0 0.1 — 313 11.3

0851 38.0 0.1 — 314 11.2

0852 40.0 0.1 — 315 11.2

0853 42.0 0.1 — 333 11.3

0854 44.0 0.1 — 353 11.4

January 7, 1999 1000 0.1 6.2 7.9 390 17.6

1001 1.0 6.0 8.0 389 17.5

1002 2.0 6.0 8.0 388 17.3

1003 3.0 6.0 7.9 387 17.2

1004 4.0 5.9 7.8 388 17.2

1005 5.0 5.9 7.8 388 17.2

1006 6.0 5.9 7.8 387 17.2

1007 7.0 5.9 7.8 388 17.2

1008 8.0 5.9 7.5 372 11.1

1009 9.0 5.9 7.5 373 11.1

1011 10.0 5.9 7.5 373 11.1

1012 12.0 5.9 7.5 375 11.1

1013 14.0 5.9 7.5 370 11.1

March 2, 1999 1000 0.1 11.7 9.1 400 15.2

1001 1.0 11.8 9.2 403 14.1

1002 2.0 12.0 9.3 403 13.9

1003 3.0 11.9 9.1 403 13.8

1004 4.0 11.8 9.1 403 13.7

1005 5.0 11.6 9.0 399 13.4

1006 6.0 10.3 8.6 394 12.5

1007 7.0 8.3 8.2 393 11.7

1008 8.0 7.5 8.2 393 11.4

1009 9.0 7.3 8.1 393 11.1

1010 10.0 7.2 8.1 392 11.0

1011 12.0 7.2 8.1 392 10.9

1012 14.0 7.0 8.0 392 10.9

1013 16.0 7.1 8.0 391 10.9

1014 18.0 7.1 7.9 391 10.8

1015 20.0 7.1 7.9 391 10.8

1016 22.0 7.0 7.9 391 10.8

1017 24.0 7.1 7.9 390 10.8

1018 26.0 7.1 7.9 390 10.8

1019 28.0 6.8 7.9 393 10.8

1020 30.0 6.6 7.9 394 10.8

1021 32.0 6.5 7.9 397 10.8

1022 34.0 6.1 7.8 397 10.8

1023 36.0 5.9 7.8 408 10.8

1024 38.0 5.7 7.9 400 10.8

1025 38.5 5.7 7.9 491 10.8

May 4, 1999 1010 0.1 9.1 8.2 418 15.9

1011 1.0 9.0 8.3 420 15.9

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
24 Table 2

1012 2.0 8.8 8.2 420 15.9

1013 3.0 8.9 8.2 420 15.9

1014 4.0 8.8 8.3 420 15.8

1015 5.0 7.9 8.2 420 15.8

1016 6.0 8.7 8.3 420 15.7

1017 7.0 8.6 8.2 406 15.7

1018 8.0 6.6 7.6 408 14.6

1019 9.0 5.6 7.6 404 13.8

1020 10.0 5.2 7.5 403 13.3

1021 12.0 3.7 7.4 389 12.1

1022 14.0 2.6 7.3 387 11.6

1023 16.0 2.3 7.3 387 11.4

1024 18.0 2.1 7.3 387 11.3

1025 20.0 2.2 7.2 387 11.3

1026 22.0 2.1 7.2 387 11.3

1027 24.0 2.2 7.2 387 11.2

1028 26.0 2.1 7.2 386 11.2

1029 28.0 2.1 7.2 386 11.2

1030 30.0 2.1 7.2 386 11.2

1031 32.0 2.2 7.2 385 11.2

1032 34.0 2.0 7.2 385 11.2

1033 36.0 2.0 7.2 385 11.2

1034 38.0 2.0 7.2 385 11.2

1035 39.1 0.1 7.5 390 11.1

July 13, 1999 1010 0.1 8.0 8.8 462 26.6

1011 1.0 8.2 8.8 462 26.4

1012 2.0 8.2 8.9 462 26.4

1013 3.0 8.2 8.9 462 26.0

1014 4.0 8.1 8.8 460 26.0

1015 5.0 7.8 8.7 436 25.2

1016 6.0 3.0 7.8 441 21.0

1017 7.0 0.4 7.7 427 17.6

1018 8.0 0.1 7.8 420 16.4

1019 9.0 0.1 7.8 414 15.2

1021 10.0 0.1 7.8 411 14.5

1022 12.0 0.1 7.8 395 13.5

1023 14.0 0.1 7.6 395 12.2

1024 16.0 0.1 7.6 391 11.7

1025 18.0 0.1 7.5 391 11.5

1026 20.0 0.1 7.5 391 11.4

1027 22.0 0.1 7.4 391 11.4

1028 24.0 0.1 7.4 390 11.4

1029 26.0 0.1 7.4 390 11.4

1031 28.0 0.1 7.3 390 11.4

1032 30.0 0.1 7.3 391 11.4

1033 32.0 0.1 7.3 391 11.3

1034 34.0 0.1 7.3 391 11.3

1035 36.0 0.1 7.3 495 11.4

1036 37.8 0.1 7.2 385 11.2

September 21, 1999 0940 0.1 8.2 8.4 483 22.8

0941 1.0 8.3 8.4 486 23.0

0942 2.0 8.2 8.4 488 22.9

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
Table 2 25

0943 3.0 8.1 8.4 490 22.9

0944 4.0 8.2 8.4 491 22.9

0945 5.0 8.2 8.4 492 22.9

0946 6.0 8.2 8.4 493 22.8

0947 7.0 8.1 8.4 494 22.8

0948 8.0 7.9 8.4 495 22.7

0949 9.0 1.2 7.7 460 18.7

0950 10.0 0.7 7.5 488 15.8

0951 12.0 0.3 7.4 436 13.2

0952 14.0 0.2 7.3 430 12.3

0953 16.0 0.2 7.2 427 11.8

0954 18.0 0.2 7.2 427 11.6

0955 20.0 0.1 7.2 428 11.6

0956 22.0 0.2 7.2 429 11.5

0957 24.0 0.1 7.1 429 11.5

0958 26.0 0.1 7.1 429 11.5

0959 28.0 0.1 7.1 429 11.5

1000 30.0 0.1 7.1 429 11.5

1001 32.0 0.1 7.1 429 11.5

1002 34.0 0.1 7.1 429 11.5

1003 36.0 0.1 7.1 429 11.4

1004 38.0 0.1 7.0 452 11.5

Loveland Reservoir east end near source inlet:

September 10, 1998 1630 1.0 7.2 8.6 415 27.5

1631 2.0 7.0 8.6 417 27.4

1632 3.0 7.0 8.6 417 27.4

1633 4.0 6.9 8.6 418 27.3

1634 5.0 6.6 8.5 422 27.0

1635 6.0 1.8 7.9 434 25.2

1636 7.0 0.6 7.7 400 23.3

1637 8.0 0.2 7.6 347 18.1

1638 9.0 0.2 7.5 338 14.9

1639 10.0 0.2 7.5 341 13.8

1640 11.0 0.2 7.5 343 12.6

1641 12.0 0.2 7.5 339 12.2

1642 13.0 0.2 7.5 338 12.0

1643 14.0 0.2 7.5 339 11.8

1644 15.0 0.2 7.5 340 11.7

1645 16.0 0.1 7.5 342 11.6

1646 17.0 0.1 7.4 343 11.5

1647 18.0 0.1 7.4 344 11.5

November 4, 1998 0930 0.1 7.6 — 390 18.0

0931 1.0 7.5 — 391 18.0

0932 2.0 7.4 — 391 17.9

0933 3.0 7.2 — 394 17.8

0934 4.0 7.0 — 396 17.6

0935 5.0 6.6 — 396 17.6

0936 6.0 6.6 — 393 17.5

0937 7.0 6.6 — 392 17.5

0938 8.0 6.4 — 393 17.5

0939 9.0 5.5 — 384 17.3

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
26 Table 2

0940 10.0 4.7 — 372 16.9

0941 11.0 2.2 — 355 15.8

0942 12.0 1.0 — 329 14.2

0943 13.0 0.6 — 324 13.0

0944 14.0 0.5 — 320 12.5

0945 15.0 0.4 — 319 12.2

0946 16.0 0.4 — 319 11.9

0947 18.0 0.3 — 318 11.6

March 2, 1999 1140 0.1 11.5 8.7 417 15.5

1141 1.0 11.6 8.8 416 15.3

1142 2.0 11.6 8.8 414 14.2

1143 3.0 11.0 8.7 416 13.8

1144 4.0 10.3 8.5 421 13.6

1145 5.0 9.9 8.5 422 13.5

1146 6.0 9.0 8.3 424 13.1

1147 7.0 7.8 8.1 411 12.7

1148 8.0 6.6 8.0 413 12.2

1149 9.0 6.3 7.9 410 12.0

1150 9.7 5.7 7.9 410 11.9

May 4, 1999 1110 0.1 9.1 8.4 434 17.5

1111 1.0 9.1 8.5 434 17.5

1112 2.0 9.0 8.4 434 17.4

1113 3.0 8.9 8.4 435 17.3

1114 4.0 8.8 8.4 431 17.2

1115 5.0 8.1 8.3 430 16.6

1116 6.0 6.2 7.8 422 15.8

1117 7.0 5.1 7.7 421 15.0

1118 8.0 4.4 7.6 420 14.4

1119 9.0 3.8 7.6 413 13.9

1121 10.0 3.4 7.5 411 13.6

1122 10.4 3.1 7.5 410 13.5

July 13, 1999 1110 0.1 7.3 9.0 469 27.6

1111 1.0 7.6 9.0 468 27.6

1112 2.0 7.7 9.0 464 27.6

1113 3.0 7.7 9.0 467 27.0

1114 4.0 7.4 8.9 462 25.5

1115 5.0 6.4 8.6 456 24.7

1116 6.0 4.8 8.6 459 23.8

1117 7.0 2.1 8.0 428 21.8

1118 8.0 0.4 8.0 431 18.4

1119 9.0 0.2 8.0 420 15.8

1120 10.0 0.2 8.0 414 14.4

1121 10.4 0.1 8.1 416 14.1

Date Time

Sampling depth

(m)

Oxygen,

dissolved

(mg/L)

pH, water

whole field

(standard units)

Specific

conductance

(μS/cm)

Water

temperature

(°C)

(PCODE: 00098) (PCODE: 000300) (PCODE: 000400) (PCODE: 00095) (PCODE: 00010)

Table 2. Water-quality depth-profile data for dissolved oxygen, pH, specific conductance, and temperature for the Sweetwater and 

Loveland Reservoirs sampling sites, San Diego County, California—Continued
27 Table 3

Table 3. Analytical results for volatile organic compound concentrations (VOCs) in water samples, Sweetwater and Loveland Reservoirs, San Diego Cou[See table 1 for site identification number. Time is denoted in 24-hour scale. An “E” indicates that the value has been estimated because of interference 

limits. The number given below each compound is its parameter code (PCODE). Calif., California; SWR, Sweetwater Reservoir; NA, not analy

<, compound was not detected at a concentration above the reporting level; μg/L, microgram per liter]
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Acetate, vinyl

Acrolein total

1,1,1-Trichloroethane

1,1,2-Trichloroethane

1,1-Dichloroethane

1,1-Dichloroethylene

1,1-Dichloropropene

1,2,3-Trichloropropane

1,2-Dibromoethane

77057 34210 34506 34511 34496 34501 77168 77443 77651

Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

9-Sep-1998 1550 NA NA <0.128 <0.256 <0.264 <0.176 <0.104 <0.640 <0.1449-Sep-1998 1600 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

3-Nov-1998 1030 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.0723-Nov-1998 1040 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

6-Jan-1999 930 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

1-Mar-1999 1030 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0361-Mar-1999 1045 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1115 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0363-May-1999 1130 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1120 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.03612-Jul-1999 1130 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

20-Sep-1999 1140 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.03620-Sep-1999 1150 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.03610-Sep-1998 845 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.07210-Sep-1998 900 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

3-Nov-1998 1110 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

6-Jan-1999 1000 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

1-Mar-1999 1100 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1150 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0363-May-1999 1200 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1210 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.03612-Jul-1999 1220 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

9-Sep-1998 1630 NA NA <0.128 <0.256 <0.264 <0.176 <0.104 <0.640 <0.1449-Sep-1998 1640 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

3-Nov-1998 1140 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.0723-Nov-1998 1150 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

6-Jan-1999 1030 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

1-Mar-1999 1130 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1235 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0363-May-1999 1240 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1240 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.03612-Jul-1999 1250 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

20-Sep-1999 1220 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.03620-Sep-1999 1230 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.03610-Sep-1998 1010 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Acetate, vinyl

Acrolein total

1,1,1-Trichloroethane

1,1,2-Trichloroethane

1,1-Dichloroethane

1,1-Dichloroethylene

1,1-Dichloropropene

1,2,3-Trichloropropane

1,2-Dibromoethane

77057 34210 34506 34511 34496 34501 77168 77443 77651

Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

10-Sep-1998 1020 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

3-Nov-1998 1205 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.0723-Nov-1998 1215 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

6-Jan-1999 1100 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

1-Mar-1999 1220 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1310 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0363-May-1999 1320 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1320 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.03612-Jul-1999 1330 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

10-Sep-1998 1240 NA NA <0.128 <0.256 <0.264 <0.176 <0.104 <0.640 <0.14410-Sep-1998 1250 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

3-Nov-1998 1340 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

6-Jan-1999 1130 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

2-Mar-1999 840 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1350 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0363-May-1999 1400 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1420 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

10-Sep-1998 1310 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.162 <0.036

3-Nov-1998 1400 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

6-Jan-1999 1150 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

1-Mar-1999 1240 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1440 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1440 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

20-Sep-1999 1250 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.03610-Sep-1998 930 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.07210-Sep-1998 940 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

3-Nov-1998 1430 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

6-Jan-1999 1220 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

1-Mar-1999 1310 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

3-May-1999 1510 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

12-Jul-1999 1500 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

10-Sep-1998 1610 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.162 <0.03610-Sep-1998 1620 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.162 <0.036

4-Nov-1998 1030 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0364-Nov-1998 1040 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

7-Jan-1999 1010 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072

2-Mar-1999 1150 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Acetate, vinyl

Acrolein total

1,1,1-Trichloroethane

1,1,2-Trichloroethane

1,1-Dichloroethane

1,1-Dichloroethylene

1,1-Dichloropropene

1,2,3-Trichloropropane

1,2-Dibromoethane

77057 34210 34506 34511 34496 34501 77168 77443 77651

Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

4-May-1999 1040 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.0364-May-1999 1050 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

13-Jul-1999 1020 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.03613-Jul-1999 1030 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

21-Sep-1999 1000 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.03621-Sep-1999 1020 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.036

nlet site 2 10-Sep-1998 1650 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.162 <0.036nlet site 2 10-Sep-1998 1700 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.162 <0.036nlet site 2 4-Nov-1998 1155 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072nlet site 2 4-Nov-1998 1205 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036nlet site 2 7-Jan-1999 1035 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036nlet site 2 2-Mar-1999 1220 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036nlet site 2 4-May-1999 1120 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036nlet site 2 4-May-1999 1130 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036nlet site 2 13-Jul-1999 1100 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036

WR 6-Jan-1999 1515 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072WR 7-Jan-1999 1420 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072WR 2-Mar-1999 1540 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036WR 3-May-1999 1645 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036WR 12-Jul-1999 1620 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072WR 20-Sep-1999 1630 NA NA <0.032 <0.060 <0.066 <0.040 <0.026 <0.160 <0.036

SWR 7-Jan-1999 1350 NA NA <0.064 <0.128 <0.132 <0.088 <0.052 <0.320 <0.072SWR 2-Mar-1999 1630 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036SWR 3-May-1999 1607 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036SWR 12-Jul-1999 1700 NA NA <0.032 <0.064 <0.066 <0.044 <0.026 <0.160 <0.036SWR 20-Sep-1999 1430 NA NA E0.028 0.060 <0.066 <0.040 <0.026 <0.160 <0.036

ter at SWR 20-Sep-1999 1500 NA NA E0.033 0.060 <0.066 <0.040 <0.026 <0.160 <0.036
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

1,2-Dichloroethane

1,2-Dichloropropane

trans -1,2-Dichloroethylene

2,2-Dichloropropane

trans -1,4-Dichloro-2-butene

2-Hexanone

Acetone

Acrylonitrile

32103 34541 34546 77170 73547 77103 81552 34215

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.520 <0.272 <0.128 <0.312 <2.800 <2.800 <20.000 <4.800<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 E1.780 <1.200

<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 E1.199 <1.200

<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.520 <0.272 <0.128 <0.312 <2.800 <2.800 <20.000 <4.800<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 E2.212 <1.200

<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

1,2-Dichloroethane

1,2-Dichloropropane

trans -1,2-Dichloroethylene

2,2-Dichloropropane

trans -1,4-Dichloro-2-butene

2-Hexanone

Acetone

Acrylonitrile

32103 34541 34546 77170 73547 77103 81552 34215

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.520 <0.272 <0.128 <0.312 <2.800 <2.800 <20.000 <4.800<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.134 <0.068 <0.032 <0.078 <0.692 <0.746 <4.904 <1.226<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.134 <0.068 <0.032 <0.078 <0.692 <0.746 <4.904 <1.226<0.134 <0.068 <0.032 <0.078 <0.692 <0.746 <4.904 <1.226<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

1,2-Dichloroethane

1,2-Dichloropropane

trans -1,2-Dichloroethylene

2,2-Dichloropropane

trans -1,4-Dichloro-2-butene

2-Hexanone

Acetone

Acrylonitrile

32103 34541 34546 77170 73547 77103 81552 34215

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200<0.134 <0.068 <0.032 <0.078 <0.692 <0.746 <4.904 <1.226<0.134 <0.068 <0.032 <0.078 <0.692 <0.746 <4.904 <1.226<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 E0.990 <1.200

<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <1.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200<0.260 <0.136 <0.064 <0.156 <1.400 <1.400 <10.000 <2.400<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 E3.987 <1.200

<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 E4.564 <1.200

<0.130 <0.068 <0.032 <0.078 <0.700 <0.700 <5.000 <1.200<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 E6.319 <1.200

<0.130 <0.068 <0.032 <0.050 <0.700 <0.700 <7.000 <1.200
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

1,2,3-Trichlorobenzene

1,2,3-Trimethylbenzene

1,2,4-Trichlorobenzene

1,2,4-Trimethylbenzene

1,3,5-Trimethylbenzene

1,3-Dichlorobenzene

1,4-Dichlorobenzene

Isopropylbenzene

77613 77221 34551 77222 77226 34566 34571 77223

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<1.080 <0.480 <0.760 0.224 <0.176 <0.216 <0.20 <0.128

<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 E0.027 E0.010 <0.054 <0.05 <0.032

<1.080 <0.480 <0.760 <0.224 <0.176 <0.216 <0.20 <0.128<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

1,2,3-Trichlorobenzene

1,2,3-Trimethylbenzene

1,2,4-Trichlorobenzene

1,2,4-Trimethylbenzene

1,3,5-Trimethylbenzene

1,3-Dichlorobenzene

1,4-Dichlorobenzene

Isopropylbenzene

77613 77221 34551 77222 77226 34566 34571 77223

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<1.080 <0.480 <0.760 <0.224 <0.176 <0.216 <0.20 <0.128<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.266 <0.124 <0.188 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 0.025 <0.190 E0.089 E0.025 <0.054 <0.05 <0.032

<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.266 <0.124 <0.188 <0.056 <0.044 <0.054 <0.05 <0.032<0.266 <0.124 <0.188 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

1,2,3-Trichlorobenzene

1,2,3-Trimethylbenzene

1,2,4-Trichlorobenzene

1,2,4-Trimethylbenzene

1,3,5-Trimethylbenzene

1,3-Dichlorobenzene

1,4-Dichlorobenzene

Isopropylbenzene

77613 77221 34551 77222 77226 34566 34571 77223

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.266 <0.124 <0.188 <0.056 <0.044 <0.054 <0.05 <0.032<0.266 <0.124 <0.188 E0.010 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.540 <0.240 <0.380 <0.112 <0.088 <0.108 <0.10 <0.064<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032<0.270 <0.120 <0.190 <0.056 <0.044 <0.054 <0.05 <0.032
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

Butylbenzene

N -Propylbenzene

1,2-Dichlorobenzene

sec- Butylbenzene

tert- Butylbenzene

Benzene

Bromobenzene

Bromoethene

77342 77224 34536 77350 77353 34030 81555 50002

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.760 <0.168 <0.192 <0.192 <0.400 <0.400 <0.144 <0.4<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 E0.010 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 E0.007 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 <0.035 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 <0.035 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 E0.010 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 E0.015 <0.036 <0.1<0.760 <0.168 <0.192 <0.192 <0.400 <0.400 <0.144 <0.4<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 E0.007 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 <0.035 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 <0.035 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

Butylbenzene

N -Propylbenzene

1,2-Dichlorobenzene

sec- Butylbenzene

tert- Butylbenzene

Benzene

Bromobenzene

Bromoethene

77342 77224 34536 77350 77353 34030 81555 50002

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.760 <0.168 <0.192 <0.192 <0.400 <0.400 <0.144 <0.4<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 E0.007 <0.036 <0.1<0.186 <0.168 <0.048 <0.048 <0.096 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 E0.008 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 E0.010 <0.048 <0.032 <0.060 E0.041 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.186 <0.042 <0.048 <0.048 <0.096 <0.100 <0.036 <0.1<0.186 <0.042 <0.048 <0.048 <0.096 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

Butylbenzene

N -Propylbenzene

1,2-Dichlorobenzene

sec- Butylbenzene

tert- Butylbenzene

Benzene

Bromobenzene

Bromoethene

77342 77224 34536 77350 77353 34030 81555 50002

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 E0.008 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 0E.011 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 E0.011 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 <0.035 <0.036 <0.1<0.186 <0.042 <0.048 <0.048 <0.096 <0.100 <0.036 <0.1<0.186 <0.042 <0.048 <0.048 <0.096 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 E0.010 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.380 <0.084 <0.096 <0.096 <0.200 E0.020 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 E0.012 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.032 <0.060 <0.035 <0.036 <0.1<0.380 <0.084 <0.096 <0.096 <0.200 <0.200 <0.072 <0.2<0.190 <0.042 <0.048 <0.048 <0.100 E0.011 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.048 <0.100 <0.100 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 E0.012 <0.036 <0.1<0.190 <0.042 <0.048 <0.032 <0.060 0.035 <0.036 <0.1
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

Bromoform

Carbon disulfide

Tetrachloromethane

Chlorobenzene

Dibromochloromethane

Chloroethane

Chloroform

cis- 1,2-Dichloroethylene

32104 77041 32102 34301 32105 34311 32106 77093

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.400 <1.48 <0.352 <0.112 <0.720 <0.48 E0.099 <0.152

0.231 <0.74 <0.176 <0.056 1.410 <0.24 1.540 <0.076

<0.200 <0.74 <0.176 <0.056 0.557 <0.24 0.669 <0.076<0.200 <0.74 <0.176 <0.056 0.171 <0.24 0.252 <0.076E0.220 <0.74 <0.176 <0.056 1.403 <0.24 0.964 <0.076<0.100 <0.37 <0.088 <0.028 0.171 <0.12 0.391 <0.038<0.100 E0.37 <0.088 <0.028 0.073 <0.12 0.120 <0.038<0.100 <0.37 <0.088 <0.028 0.215 <0.12 0.321 <0.038E0.080 <0.37 <0.088 <0.028 0.449 <0.12 0.324 <0.038<0.100 E0.03 <0.088 <0.028 <0.180 <0.12 E0.071 <0.038

0E.044 <0.37 <0.088 <0.028 0.142 <0.12 0.102 <0.038<0.060 E0.08 <0.060 <0.028 <0.180 <0.12 0.116 <0.038<0.060 <0.07 <0.060 <0.028 0.118 <0.12 0.176 <0.038<0.200 E0.04 <0.176 <0.056 <0.360 <0.24 <0.104 <0.076<0.200 <0.74 <0.176 <0.056 0.088 <0.24 E0.140 <0.076<0.100 <0.37 <0.088 <0.028 0.066 <0.12 0.136 <0.038<0.200 <0.74 <0.176 <0.056 0.110 <0.24 E0.130 <0.076<0.100 <0.37 <0.088 <0.028 0.129 <0.12 0.211 <0.038<0.100 <0.37 <0.088 <0.028 0.145 <0.12 0.245 <0.038<0.100 <0.37 <0.088 <0.028 0.083 <0.12 E0.086 <0.038E0.043 <0.37 <0.088 <0.028 0.202 <0.12 0.316 <0.038<0.100 <0.37 <0.088 <0.028 0.123 <0.12 E0.086 <0.038<0.400 <1.48 <0.352 <0.112 0.720 <0.48 <0.208 <0.152<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 0.270 <0.076<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.150 <0.076<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.130 <0.076<0.200 <0.74 <0.176 <0.056 0.110 <0.24 E0.140 <0.076<0.100 <0.37 <0.088 <0.028 0.093 <0.12 0.167 <0.038<0.100 <0.37 <0.088 <0.028 0.107 <0.12 0.196 <0.038<0.100 <0.37 <0.088 <0.028 0.091 <0.12 E0.092 <0.038<0.100 E0.04 <0.088 <0.028 <0.180 <0.12 E0.017 <0.038

E0.069 <0.37 <0.088 <0.028 0.334 <0.12 0.332 <0.038<0.060 E0.07 <0.060 <0.028 <0.180 <0.12 0.118 <0.038<0.060 <0.07 <0.060 <0.028 <0.180 <0.12 E0.095 <0.038<0.200 E0.05 <0.176 <0.056 <0.360 <0.24 <0.104 <0.076
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

Bromoform

Carbon disulfide

Tetrachloromethane

Chlorobenzene

Dibromochloromethane

Chloroethane

Chloroform

cis- 1,2-Dichloroethylene

32104 77041 32102 34301 32105 34311 32106 77093

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.200 <0.74 <0.176 <0.056 0.130 <0.24 0.215 <0.076<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.140 <0.076<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.140 <0.076<0.200 <0.74 <0.176 <0.056 0.097 <0.24 E0.120 <0.076<0.100 <0.37 <0.088 <0.028 0.107 <0.12 0.180 <0.038<0.100 <0.37 <0.088 <0.028 0.095 <0.12 0.212 <0.038<0.100 <0.37 <0.088 <0.028 0.120 <0.12 0.124 <0.038<0.100 E0.03 <0.088 <0.028 <0.180 <0.12 E0.018 <0.038

E0.051 <0.37 <0.088 <0.028 0.199 <0.12 0.141 <0.038<0.400 E0.06 <0.352 <0.112 <0.720 <0.48 <0.208 <0.152<0.200 <0.74 <0.176 <0.056 0.140 <0.24 0.274 <0.076<0.100 <0.37 <0.088 <0.028 0.079 <0.12 0.156 <0.038<0.200 <0.74 <0.176 <0.056 0.088 <0.24 E0.100 <0.076<0.100 <0.37 <0.088 <0.028 0.096 <0.12 0.164 <0.038<0.100 <0.37 <0.088 <0.028 0.144 <0.12 0.207 <0.038<0.100 <0.37 <0.088 <0.028 0.073 <0.12 E0.078 <0.038E0.047 <0.37 <0.088 <0.028 0.213 <0.12 0.271 <0.038<0.104 <0.37 <0.088 <0.028 <0.182 <0.12 E0.087 <0.038<0.100 <0.37 <0.088 <0.028 0.063 <0.12 0.114 <0.038<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.110 <0.076<0.100 <0.37 <0.088 <0.028 0.069 <0.12 0.112 <0.038<0.100 <0.37 <0.088 <0.028 0.030 <0.12 E0.037 <0.038<0.100 E0.01 <0.088 <0.028 0.038 <0.12 E0.027 <0.038

<0.060 <0.07 <0.060 <0.028 <0.180 <0.12 E0.067 <0.038<0.200 E0.06 <0.176 <0.056 <0.360 <0.24 <0.104 <0.076<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.130 <0.076<0.100 <0.37 <0.088 <0.028 0.076 <0.12 0.142 <0.038<0.200 <0.74 <0.176 <0.056 0.083 <0.24 E0.100 <0.076<0.100 <0.37 <0.088 <0.028 0.095 <0.12 0.161 <0.038<0.100 <0.37 <0.088 <0.028 0.086 <0.12 E0.091 <0.038

0.101 <0.37 <0.088 <0.028 0.418 <0.12 0.280 <0.038

<0.104 <0.37 <0.088 <0.028 <0.182 <0.12 E0.015 <0.038<0.104 <0.37 <0.088 <0.028 <0.182 <0.12 E0.030 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 E0.019 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 E0.020 <0.076<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

Bromoform

Carbon disulfide

Tetrachloromethane

Chlorobenzene

Dibromochloromethane

Chloroethane

Chloroform

cis- 1,2-Dichloroethylene

32104 77041 32102 34301 32105 34311 32106 77093

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 E0.015 <0.038<0.060 <0.07 <0.060 <0.028 <0.180 <0.12 <0.052 <0.038<0.060 <0.07 <0.060 <0.028 <0.180 <0.12 E0.017 <0.038<0.104 <0.37 <0.088 <0.028 <0.182 <0.12 E0.015 <0.038<0.104 <0.37 <0.088 <0.028 <0.182 <0.12 E0.024 <0.038<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 <0.104 <0.076<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 <0.038<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 E0.011 <0.038<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 <0.104 <0.076<0.200 <0.74 <0.176 <0.056 <0.360 <0.24 <0.104 <0.076<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 E0.014<0.100 <0.37 <0.088 <0.028 <0.180 <0.12 <0.052 E0.023<0.200 E0.05 <0.176 <0.056 <0.360 <0.24 E0.028 E0.029

<0.060 <0.07 <0.060 <0.028 <0.180 <0.12 <0.052 E0.021

4.114 <0.74 E0.035 <0.056 24.410 <0.24 13.220 <0.076

3.162 <0.37 E0.063 <0.028 24.800 E0.03 17.380 <0.038

6.085 <0.37 E0.043 <0.028 28.890 E0.05 12.840 <0.038

11.240 E0.02 E0.038 <0.028 44.900 <0.12 16.980 <0.038

0.243 <0.37 <0.060 <0.028 2.278 <0.12 6.168 <0.038

<0.060 <0.37 <0.060 <0.028 <0.244 <0.12 0.669 <0.038
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

cis- 1,3-Dichloropropene

1,2-Dibromo-3-chloropropane

Dibromomethane

Bromodichloromethane

Dichlorodifluoromethane

Diisopropyl ether

1,1,1,2-Tetrachloroethane

1,1,2,2,-Tetrachloroethane

34704 82625 30217 32101 34668 81577 77562 34516

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.360 <0.840 <0.20 E0.065 <0.560 <0.392 <0.176 <0.520<0.180 <0.420 E0.04 1.760 <0.280 <0.196 <0.088 <0.260

<0.180 <0.420 <0.10 0.858 <0.280 <0.196 <0.088 <0.260

<0.180 <0.420 <0.10 0.261 <0.280 <0.196 <0.088 <0.260

<0.180 <0.420 <0.10 1.660 <0.280 <0.196 <0.088 <0.260

<0.090 <0.210 <0.05 0.301 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.130 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.254 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.503 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 0.140 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 E0.037 <0.270 <0.100 <0.030 <0.090<0.090 <0.210 <0.05 0.129 <0.270 <0.100 <0.030 <0.090

<0.180 <0.420 <0.10 <0.196 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.110 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.102 <0.140 <0.098 <0.044 <0.130

<0.180 <0.420 <0.10 E0.130 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.224 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.186 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 E0.099 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 0.216 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.114 <0.140 <0.098 <0.044 <0.130

<0.360 <0.840 <0.20 <0.192 <0.560 <0.392 <0.176 <0.520<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.110 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.110 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.140 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.155 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.142 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.108 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 0.329 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 <0.048 <0.270 <0.100 <0.030 <0.090<0.090 <0.210 <0.05 E0.052 <0.270 <0.100 <0.030 <0.090<0.180 <0.420 <0.10 0.096 <0.280 <0.196 <0.088 <0.260
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

cis- 1,3-Dichloropropene

1,2-Dibromo-3-chloropropane

Dibromomethane

Bromodichloromethane

Dichlorodifluoromethane

Diisopropyl ether

1,1,1,2-Tetrachloroethane

1,1,2,2,-Tetrachloroethane

34704 82625 30217 32101 34668 81577 77562 34516

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.180 <0.420 <0.10 E0.160 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.110 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.110 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.120 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.180 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.130 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.145 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 0.186 <0.140 <0.098 <0.044 <0.130

<0.360 <0.840 <0.20 <0.192 <0.560 <0.392 <0.176 <0.520<0.180 <0.420 <0.10 E0.150 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.125 <0.140 <0.098 <0.044 <0.130

<0.180 <0.420 <0.10 E0.110 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.165 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 0.191 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 E0.082 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 0.216 <0.140 <0.098 <0.044 <0.130

<0.092 <0.214 <0.05 E0.055 <0.138 <0.098 <0.044 <0.132<0.090 <0.210 <0.05 E0.083 <0.140 <0.098 <0.044 <0.130<0.180 <0.420 <0.10 E0.100 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.109 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 E0.038 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 E0.031 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 E0.038 <0.270 <0.100 <0.030 <0.090<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 E0.088 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.110 <0.140 <0.098 <0.044 <0.130

<0.180 <0.420 <0.10 E0.100 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 0.161 <0.140 <0.098 <0.044 <0.130

<0.090 <0.210 <0.05 E0.098 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 0.407 <0.140 <0.098 <0.044 <0.130

<0.092 <0.214 <0.05 <0.048 <0.138 <0.098 <0.044 <0.132<0.092 <0.214 <0.05 <0.048 <0.138 <0.098 <0.044 <0.132<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

cis- 1,3-Dichloropropene

1,2-Dibromo-3-chloropropane

Dibromomethane

Bromodichloromethane

Dichlorodifluoromethane

Diisopropyl ether

1,1,1,2-Tetrachloroethane

1,1,2,2,-Tetrachloroethane

34704 82625 30217 32101 34668 81577 77562 34516

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.270 <0.100 <0.030 <0.090<0.090 <0.210 <0.05 <0.048 <0.270 <0.100 <0.030 <0.090<0.092 <0.214 <0.05 <0.048 <0.138 <0.098 <0.044 <0.132<0.092 <0.214 <0.05 <0.048 <0.138 <0.098 <0.044 <0.132<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 <0.048 <0.026 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 <0.048 <0.140 <0.098 <0.044 <0.130<0.180 <0.420 <0.10 <0.096 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 <0.048 E0.065 <0.100 <0.030 <0.090

<0.180 <0.420 <0.10 26.590 <0.280 <0.196 <0.088 <0.260<0.090 <0.210 <0.05 32.130 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 26.780 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 36.860 <0.140 <0.098 <0.044 <0.130<0.090 <0.210 <0.05 4.380 <0.270 <0.100 <0.030 <0.090

<0.090 <0.210 <0.05 0.355 <0.270 <0.100 <0.030 <0.090
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

Hexachloroethane

Diethyl ether

Ethyl tert -butyl ether

tert- Pentyl methyl ether

Ethylbenzene

1,1,2-Trichlorotrifluoroethane

Tetrahydrofuran

Hexachlorobutadiene

34396 81576 50004 50005 34371 77652 81607 39702

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<1.440 <0.68 <0.216 <0.440 <0.12 <0.128 <36.00 <0.560<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.190 <0.17 <0.054 <0.110 E0.01 <0.060 <2.20 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 E0.02 <0.032 <9.00 <0.140<1.440 <0.68 <0.216 <0.440 <0.12 <0.128 <36.00 <0.560<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

Hexachloroethane

Diethyl ether

Ethyl tert -butyl ether

tert- Pentyl methyl ether

Ethylbenzene

1,1,2-Trichlorotrifluoroethane

Tetrahydrofuran

Hexachlorobutadiene

34396 81576 50004 50005 34371 77652 81607 39702

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<1.440 <0.68 <0.216 <0.440 <0.12 <0.128 <36.00 <0.560<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.362 <0.17 <0.054 <0.112 <0.03 <0.032 <8.79 <0.142<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.190 <0.17 <0.054 <0.110 E0.04 <0.060 <2.20 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.362 <0.17 <0.054 <0.112 <0.03 <0.032 <8.79 <0.142<0.362 <0.17 <0.054 <0.112 <0.03 <0.032 <8.79 <0.142<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

Hexachloroethane

Diethyl ether

Ethyl tert -butyl ether

tert- Pentyl methyl ether

Ethylbenzene

1,1,2-Trichlorotrifluoroethane

Tetrahydrofuran

Hexachlorobutadiene

34396 81576 50004 50005 34371 77652 81607 39702

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 E0.01 <0.032 <9.00 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.362 <0.17 <0.054 <0.112 <0.03 <0.032 <8.79 <0.142<0.362 <0.17 <0.054 <0.112 <0.03 <0.032 <8.79 <0.142<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.720 <0.34 <0.108 <0.220 <0.06 <0.064 <18.00 <0.280E0.006 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.360 <0.17 <0.054 <0.110 <0.03 <0.032 <9.00 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140<0.190 <0.17 <0.054 <0.110 <0.03 <0.060 <2.20 <0.140
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

1,2,3,5-Tetramethylbenzene

Ethyl methacrylate

Methyl methacrylate

Ethyl acrylonitrile

Bromochloromethane

Methyl acrylate

Methyl iodide

tert- Butyl methyl ether

50000 73570 81597 81593 77297 49991 77424 78032

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.80 <1.120 <1.40 <2.28 <0.176 <5.600 <0.840 <0.680<0.40 <0.560 <0.70 <1.14 E0.160 <2.800 <0.420 <0.340

<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.250<0.20 <0.280 <0.35 <0.57 E0.013 <1.400 <0.210 0.209

<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.253<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.112<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.053<0.20 <0.280 <0.35 <0.57 E0.012 <1.400 <0.210 E0.100

<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.107<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 E0.107<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 E0.110<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.110<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.230<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.225<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.105<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.063<0.20 <0.280 <0.35 <0.57 E0.049 <1.400 <0.210 E0.077

<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.277<0.80 <1.120 <1.40 <2.28 <0.176 <5.600 <0.840 <0.680<0.40 <0.560 <0.70 <1.14 E0.092 <2.800 <0.420 <0.340

<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.230<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.212<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.074<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.098<0.20 <0.280 <0.35 <0.57 E0.029 <1.400 <0.210 E0.080

<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 E0.080<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 E0.101<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

1,2,3,5-Tetramethylbenzene

Ethyl methacrylate

Methyl methacrylate

Ethyl acrylonitrile

Bromochloromethane

Methyl acrylate

Methyl iodide

tert- Butyl methyl ether

50000 73570 81597 81593 77297 49991 77424 78032

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.40 <0.560 <0.70 <1.14 E0.020 <2.800 <0.420 <0.340

<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.220<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.217<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.108<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.098<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.085<0.80 <1.120 <1.40 <2.28 <0.176 <5.600 <0.840 <0.680<0.40 <0.560 <0.70 <1.14 E0.044 <2.800 <0.420 0.340

<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.120<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.250<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.213<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.092<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.066<0.20 <0.280 <0.35 <0.57 E0.034 <1.400 <0.210 E0.078

<0.24 <0.278 <0.35 <0.57 <0.044 <1.357 <0.208 <0.166<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.310<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.219<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.050<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.100E0.02 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 0.897<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.110<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.250<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.222<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.20 <0.280 <0.35 <0.57 E0.011 <1.400 <0.210 E0.082

<0.24 <0.278 <0.35 <0.57 <0.044 <1.357 <0.208 <0.166<0.24 <0.278 <0.35 <0.57 <0.044 <1.357 <0.208 0.114<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.208 <0.170<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.120<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.096
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

1,2,3,5-Tetramethylbenzene

Ethyl methacrylate

Methyl methacrylate

Ethyl acrylonitrile

Bromochloromethane

Methyl acrylate

Methyl iodide

tert- Butyl methyl ether

50000 73570 81597 81593 77297 49991 77424 78032

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.115<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.043<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.226<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 E0.045<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 0.181<0.24 <0.278 <0.35 <0.57 <0.044 <1.357 <0.208 <0.166<0.24 <0.278 <0.35 <0.57 <0.044 <1.357 <0.208 0.145<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 <0.340<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 <0.170<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.166<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.100<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.180<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.194<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.360<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.360<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 0.315<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.056<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.155<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 E0.146<0.40 <0.560 <0.70 <1.14 <0.088 <2.800 <0.420 E0.240<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.166<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.048<0.20 <0.280 <0.35 <0.57 <0.044 <1.400 <0.210 E0.073<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 0.724<0.20 <0.180 <0.35 <0.60 <0.044 <1.400 <0.120 1.132
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

Bromomethane

Chloromethane

Dichloromethane

2-Butanone

4-Methyl-2-pentanone

m- and p- Xylene

Naphthalene

2-Chlorotoluene

34413 34418 34423 81595 78133 85795 34696 77275

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.600 <1.000 <1.520 <6.40 <1.480 <0.240 <1.00 <0.168<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 E0.015 <0.25 <0.042<0.150 E0.051 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.028 E0.035 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 E0.014 <0.25 <0.042<0.260 <0.500 E0.018 <1.60 <0.370 <0.060 <0.25 <0.042

<0.260 <0.500 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.045 E0.015 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 E0.052 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 <0.250 <0.380 <1.60 <0.370 E0.074 <0.25 <0.042<0.600 <1.000 <1.520 <6.40 <1.480 <0.240 <1.00 <0.168<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.054 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.038 E0.037 <1.60 <0.370 <0.060 <0.25 <0.042<0.260 <0.500 E0.027 <1.60 <0.370 <0.060 <0.25 <0.042

<0.260 <0.500 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

Bromomethane

Chloromethane

Dichloromethane

2-Butanone

4-Methyl-2-pentanone

m- and p- Xylene

Naphthalene

2-Chlorotoluene

34413 34418 34423 81595 78133 85795 34696 77275

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 E0.008 <0.25 <0.042<0.600 <1.000 <1.520 <6.40 <1.480 <0.240 <1.00 <0.168<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.053 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 <0.250 E0.049 <1.60 <0.370 <0.060 <0.25 <0.042

<0.148 <0.254 <0.382 <1.65 <0.374 <0.064 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 E0.014 <0.25 <0.042<0.260 <0.500 <0.380 <1.60 <0.370 E0.160 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.068 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 E0.033 E0.014 <1.60 <0.370 <0.060 <0.25 <0.042<0.148 <0.254 <0.382 <1.65 <0.374 <0.064 <0.25 <0.042<0.148 <0.254 <0.382 <1.65 <0.374 <0.064 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

Bromomethane

Chloromethane

Dichloromethane

2-Butanone

4-Methyl-2-pentanone

m- and p- Xylene

Naphthalene

2-Chlorotoluene

34413 34418 34423 81595 78133 85795 34696 77275

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.029 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 <0.250 <0.380 <1.60 <0.370 E0.040 <0.25 <0.042<0.260 <0.500 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.260 <0.500 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.148 <0.254 <0.382 <1.65 <0.374 <0.064 <0.25 <0.042<0.148 <0.254 <0.382 <1.65 <0.374 E0.029 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 <0.250 <0.380 <1.60 <0.370 E0.012 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 <0.250 <0.380 <1.60 <0.370 E0.018 <0.25 <0.042<0.150 E0.038 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 <0.250 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.036 <0.380 <1.60 <0.370 E0.016 <0.25 <0.042

<0.300 <0.500 E0.061 <3.20 <0.740 <0.120 <0.50 <0.084

<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 E0.012 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.150 E0.071 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042

<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.260 <0.500 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042<0.300 <0.500 <0.760 <3.20 <0.740 <0.120 <0.50 <0.084<0.150 E0.064 <0.380 <1.60 E0.522 <0.060 <0.25 <0.042

<0.150 E0.167 E0.053 <1.60 <0.370 <0.060 <0.25 <0.042<0.150 E0.259 E0.055 <1.60 <0.370 <0.060 <0.25 <0.042<0.260 E0.130 E0.039 <1.60 <0.370 <0.060 <0.25 <0.042<0.260 <0.500 <0.380 <1.60 <0.370 <0.060 <0.25 <0.042
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

o- Xylene

4-Isopropyl-1-methylbenzene

1,2,3,4-Tetramethylbenzene

1,3-Dichloropropane

3-Chloropropene

Styrene

Tetrachloroethylene

o- Ethyl toluene

77135 77356 49999 77173 78109 77128 34475 77220

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.240 <0.44 <0.92 <0.480 <0.800 <0.168 <0.400 <0.40<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 0.009 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.038 <0.07 <0.23 <0.120 <0.200 0.005 <0.100 <0.06<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 <0.042 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10E0.032 <0.11 <0.23 <0.120 <0.200 0.007 <0.100 <0.10

<0.240 <0.44 <0.92 <0.480 <0.800 <0.168 <0.400 <0.40<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 0.008 <0.100 <0.10<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

o- Xylene

4-Isopropyl-1-methylbenzene

1,2,3,4-Tetramethylbenzene

1,3-Dichloropropane

3-Chloropropene

Styrene

Tetrachloroethylene

o- Ethyl toluene

77135 77356 49999 77173 78109 77128 34475 77220

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.240 <0.44 <0.92 <0.480 <0.800 <0.168 <0.400 <0.40<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.064 <0.11 <0.23 <0.116 <0.196 <0.042 <0.102 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10E0.079 <0.07 <0.23 <0.120 <0.200 0.009 <0.100 0.02<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.064 <0.11 <0.23 <0.116 <0.196 <0.042 <0.102 <0.10<0.064 <0.11 <0.23 <0.116 <0.196 <0.042 <0.102 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

o- Xylene

4-Isopropyl-1-methylbenzene

1,2,3,4-Tetramethylbenzene

1,3-Dichloropropane

3-Chloropropene

Styrene

Tetrachloroethylene

o- Ethyl toluene

77135 77356 49999 77173 78109 77128 34475 77220

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L)

<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10E0.017 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.064 <0.11 <0.23 <0.116 <0.196 <0.042 <0.102 <0.10<0.064 <0.11 <0.23 <0.116 <0.196 <0.042 <0.102 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 <0.084 <0.200 <0.20<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10E0.010 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10E0.011 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.120 <0.22 <0.46 <0.240 <0.400 E0.050 <0.200 <0.20

<0.120 <0.22 <0.46 <0.240 <0.400 E0.096 <0.200 <0.20

<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 E0.006 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 E0.013 <0.100 <0.10

<0.120 <0.22 <0.46 <0.240 <0.400 E0.028 <0.200 <0.20

<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.120 <0.22 0.46 <0.240 <0.400 <0.084 <0.200 <0.20

<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.060 <0.11 <0.23 <0.120 <0.200 <0.042 <0.100 <0.10<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06<0.038 <0.07 <0.23 <0.120 <0.200 <0.042 <0.100 <0.06
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9-Sep-1998 15509-Sep-1998 1600

3-Nov-1998 10303-Nov-1998 1040

6-Jan-1999 930

1-Mar-1999 10301-Mar-1999 1045

3-May-1999 11153-May-1999 1130

12-Jul-1999 112012-Jul-1999 1130

20-Sep-1999 114020-Sep-1999 115010-Sep-1998 84510-Sep-1998 900

3-Nov-1998 1110

6-Jan-1999 1000

1-Mar-1999 1100

3-May-1999 11503-May-1999 1200

12-Jul-1999 1210

12-Jul-1999 1220

9-Sep-1998 16309-Sep-1998 1640

3-Nov-1998 11403-Nov-1998 1150

6-Jan-1999 1030

1-Mar-1999 1130

3-May-1999 12353-May-1999 1240

12-Jul-1999 124012-Jul-1999 1250

20-Sep-1999 122020-Sep-1999 123010-Sep-1998 1010

4-Chlorotoluene

Toluene

trans- 1,3-Dichloropropene

Trichloroethylene

Vinyl chloride

1,4-Bromofluorobenzene 

(surrogate)

1,2-Dichloroethane-d 4 

(surrogate)

Toluene-d 8 (surrogate)

77277 34010 34699 34488 39175 99834 99832 99833

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (%) (%) (%)

<0.224 <0.200 <0.520 <0.360 <0.440 100 96 100<0.112 <0.100 <0.260 <0.180 <0.220 98 96 100<0.112 E0.060 <0.260 <0.180 <0.220 84 121 96<0.112 <0.100 <0.260 <0.180 <0.220 83 117 97<0.112 E0.033 <0.260 <0.180 <0.220 90 92 98<0.056 <0.050 <0.130 <0.090 <0.110 87 106 93<0.056 E0.020 <0.130 <0.090 <0.110 89 109 93<0.056 E0.014 <0.130 <0.090 <0.110 96 107 100<0.056 <0.050 <0.130 <0.090 <0.110 72 98 89<0.056 E0.019 <0.130 <0.090 <0.110 93 104 99<0.056 E0.026 <0.130 <0.090 <0.110 94 104 101

0.060 E0.073 <0.090 <0.090 <0.110 99 100 990.060 E0.076 <0.090 <0.090 <0.110 102 119 107

<0.112 <0.100 <0.260 <0.180 <0.220 100 96 100<0.112 <0.100 <0.260 <0.180 <0.220 101 95 101<0.056 <0.050 <0.130 <0.090 <0.110 108 127 104<0.112 <0.100 <0.260 <0.180 <0.220 91 95 98<0.056 <0.050 <0.130 <0.090 <0.110 88 105 93<0.056 <0.050 <0.130 <0.090 <0.110 94 108 101<0.056 <0.050 <0.130 <0.090 <0.110 92 107 100<0.056 E0.025 <0.130 <0.090 <0.110 94 106 99<0.056 E0.098 <0.130 <0.090 <0.110 95 105 99<0.224 <0.200 <0.520 <0.360 <0.440 98 96 99<0.112 <0.100 <0.260 <0.180 <0.220 100 95 99<0.112 <0.100 <0.260 <0.180 <0.220 82 117 95<0.112 <0.100 <0.260 <0.180 <0.220 81 117 96<0.112 <0.100 <0.260 <0.180 <0.220 90 91 96<0.056 <0.050 <0.130 <0.090 <0.110 88 106 93<0.056 E0.007 <0.130 <0.090 <0.110 94 112 99<0.056 E0.015 <0.130 <0.090 <0.110 96 105 101<0.056 <0.050 <0.130 <0.090 <0.110 92 107 99<0.056 E0.061 <0.130 <0.090 <0.110 99 108 102<0.060 <0.050 <0.090 <0.090 <0.110 103 122 106<0.060 E0.011 <0.090 <0.090 <0.110 92 98 99<0.112 <0.100 <0.260 <0.180 <0.220 100 95 100
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

10-Sep-1998 S 1998 1550 1020

3-Nov-1998 1205

3-Nov-1998 1215

6-Jan-1999 1100

1-Mar-1999 1220

3-May-1999 13103-May-1999 1320

12-Jul-1999 1320

12-Jul-1999 1330

10-Sep-1998 124010-Sep-1998 1250

3-Nov-1998 1340

6-Jan-1999 1130

2-Mar-1999 840

3-May-1999 13503-May-1999 1400

12-Jul-1999 1420

10-Sep-1998 1310

3-Nov-1998 1400

6-Jan-1999 1150

1-Mar-1999 1240

3-May-1999 1440

12-Jul-1999 1440

20-Sep-1999 125010-Sep-1998 93010-Sep-1998 940

3-Nov-1998 1430

6-Jan-1999 1220

1-Mar-1999 1310

3-May-1999 1510

12-Jul-1999 1500

10-Sep-1998 161010-Sep-1998 1620

4-Nov-1998 1030

4-Nov-1998 1040

7-Jan-1999 1010

2-Mar-1999 1150

4-Chlorotoluene

Toluene

trans- 1,3-Dichloropropene

Trichloroethylene

Vinyl chloride

1,4-Bromofluorobenzene 

(surrogate)

1,2-Dichloroethane-d 4 

(surrogate)

Toluene-d 8 (surrogate)

77277 34010 34699 34488 39175 99834 99832 99833

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (%) (%) (%)

<0.112 <0.100 <0.260 <0.180 <0.220 98 96 101<0.112 <0.100 <0.260 <0.180 <0.220 82 120 98<0.112 <0.100 <0.260 <0.180 <0.220 84 119 97<0.112 <0.100 <0.260 <0.180 <0.220 90 94 96<0.056 <0.050 <0.130 <0.090 <0.110 88 105 93<0.056 E0.007 <0.130 <0.090 <0.110 92 108 99<0.056 <0.050 <0.130 <0.090 <0.110 94 109 100<0.056 <0.050 <0.130 <0.090 <0.110 93 104 99<0.056 E0.010 <0.130 <0.090 <0.110 95 104 100<0.224 <0.200 <0.520 <0.360 <0.440 101 95 101<0.112 <0.100 <0.260 <0.180 <0.220 103 97 101<0.056 <0.050 <0.130 <0.090 <0.110 108 127 103<0.112 E0.038 <0.260 <0.180 <0.220 92 93 98<0.056 <0.050 <0.130 <0.090 <0.110 88 106 94<0.056 <0.050 <0.130 <0.090 <0.110 92 112 99<0.056 E0.013 <0.130 <0.090 <0.110 94 111 99<0.056 E0.010 <0.130 <0.090 <0.110 95 105 100<0.056 <0.054 <0.134 <0.092 <0.112 96 96 98<0.056 <0.050 <0.130 <0.090 <0.110 82 116 97<0.112 E0.046 <0.260 <0.180 <0.220 90 93 97<0.056 E0.011 <0.130 <0.090 <0.110 86 105 91<0.056 <0.050 <0.130 <0.090 <0.110 95 109 99<0.056 E0.017 <0.130 <0.090 <0.110 93 104 100<0.060 0.265 <0.090 <0.090 <0.110 100 103 99<0.112 <0.100 <0.260 <0.180 <0.220 100 96 100<0.112 <0.100 <0.260 <0.180 <0.220 101 96 101<0.056 E0.008 <0.130 <0.090 <0.110 107 124 104<0.112 <0.100 <0.260 <0.180 <0.220 92 93 98<0.056 <0.050 <0.130 <0.090 <0.110 87 105 94<0.056 <0.050 <0.130 <0.090 <0.110 94 108 100<0.056 <0.050 <0.130 <0.090 <0.110 98 107 100<0.056 <0.054 <0.134 <0.092 <0.112 98 95 99<0.056 <0.054 <0.134 <0.092 <0.112 97 91 98<0.056 <0.050 <0.130 <0.090 <0.110 111 132 103<0.056 E0.013 <0.130 <0.090 <0.110 111 135 105<0.112 <0.100 <0.260 <0.180 <0.220 89 91 98<0.056 <0.050 <0.130 <0.090 <0.110 86 107 93
s in the water samples, SWR and Loveland Reservoirs, San Diego County, Calif.—Continued

Date Time

9 

4-May-1999 S 1998 1550 10404-May-1999 1050

13-Jul-1999 1020

13-Jul-1999 1030

21-Sep-1999 100021-Sep-1999 1020

nlet site 2 10-Sep-1998 1650nlet site 2 10-Sep-1998 1700nlet site 2 4-Nov-1998 1155

nlet site 2 4-Nov-1998 1205nlet site 2 7-Jan-1999 1035nlet site 2 2-Mar-1999 1220nlet site 2 4-May-1999 1120nlet site 2 4-May-1999 1130nlet site 2 13-Jul-1999 1100

WR 6-Jan-1999 1515WR 7-Jan-1999 1420WR 2-Mar-1999 1540WR 3-May-1999 1645WR 12-Jul-1999 1620WR 20-Sep-1999 1630

SWR 7-Jan-1999 1350SWR 2-Mar-1999 1630SWR 3-May-1999 1607SWR 12-Jul-1999 1700

SWR 20-Sep-1999 1430

ter at SWR 20-Sep-1999 1500

4-Chlorotoluene

Toluene

trans- 1,3-Dichloropropene

Trichloroethylene

Vinyl chloride

1,4-Bromofluorobenzene 

(surrogate)

1,2-Dichloroethane-d 4 

(surrogate)

Toluene-d 8 (surrogate)

77277 34010 34699 34488 39175 99834 99832 99833

(μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (%) (%) (%)

<0.056 <0.050 <0.130 <0.090 <0.110 92 105 100<0.056 E0.009 <0.130 <0.090 <0.110 91 108 100<0.056 E0.013 <0.130 <0.090 <0.110 99 108 101<0.056 E0.053 <0.130 <0.090 <0.110 98 108 100<0.060 E0.006 <0.090 <0.090 <0.110 90 94 97<0.060 E0.013 <0.090 <0.090 <0.110 90 97 98<0.056 <0.054 <0.134 <0.092 <0.112 97 96 99<0.056 <0.054 <0.134 <0.092 <0.112 97 96 97<0.112 <0.100 <0.260 <0.180 <0.220 79 120 95<0.056 E0.013 <0.130 <0.090 <0.110 110 131 103<0.056 <0.050 <0.130 <0.090 <0.110 91 92 99<0.056 E0.021 <0.130 <0.090 <0.110 88 106 93<0.056 <0.050 <0.130 <0.090 <0.110 94 105 99<0.056 E0.015 <0.130 <0.090 <0.110 93 108 98<0.056 E0.034 <0.130 <0.090 <0.110 100 111 102<0.112 E0.072 <0.260 <0.180 <0.220 93 94 99<0.112 E0.059 <0.260 <0.180 <0.220 90 93 98<0.056 E0.027 <0.130 <0.090 <0.110 88 106 93<0.056 <0.050 <0.130 <0.090 <0.110 92 107 100<0.112 E0.112 <0.260 <0.180 <0.220 97 107 101<0.060 <0.050 <0.090 <0.090 <0.110 108 121 106<0.112 <0.100 <0.260 <0.180 <0.220 89 91 96<0.056 E0.012 <0.130 <0.090 <0.110 81 108 86<0.056 <0.050 <0.130 <0.090 <0.110 89 107 88<0.056 <0.050 <0.130 <0.090 <0.110 92 102 96<0.060 E0.006 <0.090 <0.090 <0.110 88 100 83<0.060 E0.068 <0.090 <0.090 <0.110 101 116 103
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California

[See table 1 for site identification number. Time is denoted in 24-hour scale. An “E” indicates that the value has been estimated because of interferencThe number given below each compound is its parameter code (PCODE). Calif., California; SWR, Sweetwater Reservoir; %, percentage recoveryconcentration above the reporting level; μg/L, microgram per liter]61 Table 4

2,6-

Diethyaniline Acetochlor Alachlor alpha-HCH Atrazine Be

PCODE 82660 49260 46342 34253 39632 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near pump tower 9-Sep-1998 1550 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 9-Sep-1998 1600 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 3-Nov-1998 1030 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 3-Nov-1998 1040 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 6-Jan-1999 0930 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 1-Mar-1999 1030 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 1-Mar-1999 1045 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 3-May-1999 1115 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 3-May-1999 1130 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 12-Jul-1999 1120 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 12-Jul-1999 1130 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 20-Sep-1999 1140 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near pump tower 20-Sep-1999 1150 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 10-Sep-1998 0845 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 10-Sep-1998 0900 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 3-Nov-1998 1110 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 6-Jan-1999 1000 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 1-Mar-1999 1100 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 3-May-1999 1150 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 3-May-1999 1200 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 12-July-1999 1210 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near Vista del Lago station 12-July-1999 1220 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 9-Sep-1998 1630 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 9-Sep-1998 1640 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 3-Nov-1998 1140 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 3-Nov-1998 1150 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 6-Jan-1999 1030 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 1-Mar-1999 1130 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 3-May-1999 1235 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 3-May-1999 1240 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 12-July-1999 1240 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 12-July-1999 1250 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 20-Sep-1999 1220 <0.003 <0.002 <0.002 <0.002 <0.001 SWR center of minimum pool 20-Sep-1999 1230 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near recreation area 10-Sep-1998 1010 <0.003 <0.002 <0.002 <0.002 <0.001 SWR near recreation area 10-Sep-1998 1020 <0.003 <0.002 <0.002 <0.002 <0.001 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

62 Table 4 

SWR near recreation area 3-Nov-1998 1205 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 3-Nov-1998 1215 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 6-Jan-1999 1100 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 1-Mar-1999 1220 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 3-May-1999 1310 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 3-May-1999 1320 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 12-July-1999 1320 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near recreation area 12-July-1999 1330 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 10-Sep-1998 1240 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 10-Sep-1998 1250 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 3-Nov-1998 1340 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 6-Jan-1999 1130 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 2-Mar-1999 0840 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 3-May-1999 1350 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 3-May-1999 1400 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR minimum pool boundary east 12-July-1999 1420 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR east end reservoir fill boundary 10-Sep-1998 1310 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR east end reservoir fill boundary 3-Nov-1998 1400 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR east end reservoir fill boundary 6-Jan-1999 1150 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR east end reservoir fill boundary 3-May-1999 1440 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR east end reservoir fill boundary 12-July-1999 1440 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR east end reservoir fill boundary 20-Sep-1999 1250 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0930 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0940 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 3-Nov-1998 1430 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 6-Jan-1999 1220 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 1-Mar-1999 1310 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 3-May-1999 1510 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 SWR near Gum Tree Cove Pond 12-July-1999 1500 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1610 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1620 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1030 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1040 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 7-Jan-1999 1010 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 2-Mar-1999 1150 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1040 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1050 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1020 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1030 <0.003 <0.002 <0.002 <0.002 <0.001 <0.002 

2,6-

Diethyaniline Acetochlor Alachlor alpha-HCH Atrazine Benflurali

PCODE 82660 49260 46342 34253 39632 82673 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

63 Table 4Loveland Reservoir near dam site 1 21-Sep-1999 1000 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir near dam site 1 21-Sep-1999 1020 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 <0.003 <0.002 <0.002 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 <0.003 <0.002 <0.002 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 6-Jan-1999 1515 <0.003 <0.002 <0.002 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 <0.003 <0.002 <0.002 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 <0.003 <0.002 <0.002 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 3-May-1999 1645 <0.003 <0.002 <0.002 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 12-July-1999 1620 <0.003 <0.002 <0.002 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 20-Sep-1999 1630 <0.003 <0.002 <0.002 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 <0.003 <0.002 <0.002 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 <0.003 <0.002 <0.002 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 <0.003 <0.002 <0.002 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 <0.003 <0.002 <0.002 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 <0.003 <0.002 <0.002 <0.002 <0.001 Perdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 <0.003 <0.002 <0.002 <0.002 0.004 

2,6-

Diethyaniline Acetochlor Alachlor alpha-HCH Atrazine Be

PCODE 82660 49260 46342 34253 39632 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

64 Table 4 

Carbofuran Chlorpyrifos Cyanazine Dacthal Deethyl- atrazine Diazinon 

PCODE 82674 38933 4041 82682 4040 39572 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near pump tower 9-Sep-1998 1550 <0.003 <0.004 <0.004 <0.002 <0.002 0.012 SWR near pump tower 9-Sep-1998 1600 <0.003 <0.004 <0.004 <0.002 <0.002 E0.003 SWR near pump tower 3-Nov-1998 1030 <0.003 <0.004 <0.004 <0.002 <0.002 E0.004 SWR near pump tower 3-Nov-1998 1040 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 SWR near pump tower 6-Jan-1999 0930 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 SWR near pump tower 1-Mar-1999 1030 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near pump tower 1-Mar-1999 1045 <0.003 <0.004 <0.004 <0.002 <0.002 0.007 SWR near pump tower 3-May-1999 1115 <0.003 <0.004 <0.004 <0.002 <0.002 E0.003 SWR near pump tower 3-May-1999 1130 <0.003 <0.004 <0.004 <0.002 <0.002 0.007 SWR near pump tower 12-Jul-1999 1120 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near pump tower 12-Jul-1999 1130 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near pump tower 20-Sep-1999 1140 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 SWR near pump tower 20-Sep-1999 1150 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near Vista del Lago station 10-Sep-1998 0845 <0.003 <0.004 <0.004 <0.002 <0.002 0.008 SWR near Vista del Lago station 10-Sep-1998 0900 <0.003 <0.004 <0.004 <0.002 <0.002 E0.004 SWR near Vista del Lago station 3-Nov-1998 1110 <0.003 <0.004 <0.004 <0.002 <0.002 0.004 SWR near Vista del Lago station 6-Jan-1999 1000 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near Vista del Lago station 1-Mar-1999 1100 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near Vista del Lago station 3-May-1999 1150 <0.003 <0.004 <0.004 <0.002 <0.002 0.013 SWR near Vista del Lago station 3-May-1999 1200 <0.003 <0.004 <0.004 <0.002 <0.002 E0.003 SWR near Vista del Lago station 12-July-1999 1210 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near Vista del Lago station 12-July-1999 1220 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR center of minimum pool 9-Sep-1998 1630 <0.003 <0.004 <0.004 <0.002 <0.002 0.011 SWR center of minimum pool 9-Sep-1998 1640 <0.003 <0.004 <0.004 <0.002 <0.002 0.005 SWR center of minimum pool 3-Nov-1998 1140 <0.003 <0.004 <0.004 <0.002 <0.002 E0.009 SWR center of minimum pool 3-Nov-1998 1150 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 SWR center of minimum pool 6-Jan-1999 1030 <0.003 <0.004 <0.004 <0.002 <0.002 0.009 SWR center of minimum pool 1-Mar-1999 1130 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR center of minimum pool 3-May-1999 1235 <0.003 <0.004 <0.004 <0.002 <0.002 0.004 SWR center of minimum pool 3-May-1999 1240 <0.003 <0.004 <0.004 <0.002 <0.002 E0.004 SWR center of minimum pool 12-July-1999 1240 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR center of minimum pool 12-July-1999 1250 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR center of minimum pool 20-Sep-1999 1220 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 SWR center of minimum pool 20-Sep-1999 1230 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 SWR near recreation area 10-Sep-1998 1010 <0.003 <0.004 <0.004 <0.002 <0.002 0.009 SWR near recreation area 10-Sep-1998 1020 <0.003 <0.004 <0.004 <0.002 <0.002 0.007 SWR near recreation area 3-Nov-1998 1205 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 SWR near recreation area 3-Nov-1998 1215 <0.003 <0.004 <0.004 <0.002 <0.002 E0.004 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

65 Table 4SWR near recreation area 6-Jan-1999 1100 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near recreation area 1-Mar-1999 1220 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near recreation area 3-May-1999 1310 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near recreation area 3-May-1999 1320 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near recreation area 12-July-1999 1320 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near recreation area 12-July-1999 1330 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 10-Sep-1998 1240 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 10-Sep-1998 1250 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 3-Nov-1998 1340 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 6-Jan-1999 1130 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 2-Mar-1999 0840 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 3-May-1999 1350 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 3-May-1999 1400 <0.003 <0.004 <0.004 <0.002 <0.002 SWR minimum pool boundary east 12-July-1999 1420 <0.003 <0.004 <0.004 <0.002 <0.002 SWR east end reservoir fill boundary 10-Sep-1998 1310 <0.003 <0.004 <0.004 <0.002 <0.002 ESWR east end reservoir fill boundary 3-Nov-1998 1400 <0.003 <0.004 <0.004 <0.002 <0.002 SWR east end reservoir fill boundary 6-Jan-1999 1150 <0.003 <0.004 <0.004 <0.002 <0.002 SWR east end reservoir fill boundary 3-May-1999 1440 <0.003 <0.004 <0.004 <0.002 <0.002 SWR east end reservoir fill boundary 12-July-1999 1440 <0.003 <0.004 <0.004 <0.002 <0.002 SWR east end reservoir fill boundary 20-Sep-1999 1250 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0930 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0940 <0.003 <0.004 <0.004 <0.002 <0.002 ESWR near Gum Tree Cove Pond 3-Nov-1998 1430 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near Gum Tree Cove Pond 6-Jan-1999 1220 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near Gum Tree Cove Pond 1-Mar-1999 1310 <0.003 <0.004 <0.004 <0.002 <0.002 SWR near Gum Tree Cove Pond 3-May-1999 1510 <0.003 <0.004 <0.004 <0.002 <0.002 ESWR near Gum Tree Cove Pond 12-July-1999 1500 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1610 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1620 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1030 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1040 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 7-Jan-1999 1010 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 2-Mar-1999 1150 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1040 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1050 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1020 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1030 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 21-Sep-1999 1000 <0.003 <0.004 <0.004 <0.002 <0.002 Loveland Reservoir near dam site 1 21-Sep-1999 1020 <0.003 <0.004 <0.004 <0.002 <0.002 

Carbofuran Chlorpyrifos Cyanazine Dacthal Deethyl- atrazine D

PCODE 82674 38933 4041 82682 4040 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

66 Table 4 

Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Sweetwater River at low flow barrier at SWR 6-Jan-1999 1515 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 <0.003 <0.004 <0.004 <0.002 <0.002 <0.010 Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Sweetwater River at low flow barrier at SWR 3-May-1999 1645 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Sweetwater River at low flow barrier at SWR 12-July-1999 1620 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Sweetwater River at low flow barrier at SWR 20-Sep-1999 1630 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Perdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Perdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 Perdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 <0.003 <0.004 <0.004 <0.002 <0.002 <0.002 

Carbofuran Chlorpyrifos Cyanazine Dacthal Deethyl- atrazine Diazinon 

PCODE 82674 38933 4041 82682 4040 39572 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

67 Table 4

EPTC Ethalfluralin Ethoprophos Fonofos Lindane 

PCODE 82668 82663 82672 4095 39341 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near pump tower 9-Sep-1998 1550 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 9-Sep-1998 1600 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 3-Nov-1998 1030 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 3-Nov-1998 1040 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 6-Jan-1999 0930 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 1-Mar-1999 1030 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 1-Mar-1999 1045 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 3-May-1999 1115 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 3-May-1999 1130 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 12-Jul-1999 1120 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 12-Jul-1999 1130 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 20-Sep-1999 1140 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near pump tower 20-Sep-1999 1150 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 10-Sep-1998 0845 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 10-Sep-1998 0900 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 3-Nov-1998 1110 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 6-Jan-1999 1000 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 1-Mar-1999 1100 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 3-May-1999 1150 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 3-May-1999 1200 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 12-July-1999 1210 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near Vista del Lago station 12-July-1999 1220 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 9-Sep-1998 1630 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 9-Sep-1998 1640 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 3-Nov-1998 1140 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 3-Nov-1998 1150 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 6-Jan-1999 1030 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 1-Mar-1999 1130 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 3-May-1999 1235 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 3-May-1999 1240 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 12-July-1999 1240 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 12-July-1999 1250 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 20-Sep-1999 1220 <0.002 <0.004 <0.003 <0.003 <0.004 SWR center of minimum pool 20-Sep-1999 1230 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near recreation area 10-Sep-1998 1010 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near recreation area 10-Sep-1998 1020 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near recreation area 3-Nov-1998 1205 <0.002 <0.004 <0.003 <0.003 <0.004 SWR near recreation area 3-Nov-1998 1215 <0.002 <0.004 <0.003 <0.003 <0.004 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

68 Table 4 

SWR near recreation area 6-Jan-1999 1100 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near recreation area 1-Mar-1999 1220 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near recreation area 3-May-1999 1310 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near recreation area 3-May-1999 1320 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near recreation area 12-July-1999 1320 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near recreation area 12-July-1999 1330 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 10-Sep-1998 1240 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 10-Sep-1998 1250 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 3-Nov-1998 1340 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 6-Jan-1999 1130 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 2-Mar-1999 0840 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 3-May-1999 1350 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 3-May-1999 1400 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR minimum pool boundary east 12-July-1999 1420 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR east end reservoir fill boundary 10-Sep-1998 1310 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR east end reservoir fill boundary 3-Nov-1998 1400 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR east end reservoir fill boundary 6-Jan-1999 1150 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR east end reservoir fill boundary 3-May-1999 1440 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR east end reservoir fill boundary 12-July-1999 1440 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR east end reservoir fill boundary 20-Sep-1999 1250 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0930 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0940 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 3-Nov-1998 1430 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 6-Jan-1999 1220 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 1-Mar-1999 1310 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 3-May-1999 1510 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 SWR near Gum Tree Cove Pond 12-July-1999 1500 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1610 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1620 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1030 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1040 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 7-Jan-1999 1010 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 2-Mar-1999 1150 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1040 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1050 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1020 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1030 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 21-Sep-1999 1000 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 Loveland Reservoir near dam site 1 21-Sep-1999 1020 <0.002 <0.004 <0.003 <0.003 <0.004 <0.002 

EPTC Ethalfluralin Ethoprophos Fonofos Lindane Linuron 

PCODE 82668 82663 82672 4095 39341 82666 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

69 Table 4Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 <0.002 <0.004 <0.003 <0.003 <0.004 Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 <0.002 <0.004 <0.003 <0.003 <0.004 Sweetwater River at low flow barrier at SWR 6-Jan-1999 1515 <0.002 <0.004 <0.003 <0.003 <0.004 Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 <0.002 <0.004 <0.003 <0.003 <0.004 Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 <0.002 <0.004 <0.003 <0.003 <0.004 Sweetwater River at low flow barrier at SWR 3-May-1999 1645 <0.002 <0.004 <0.003 <0.003 <0.004 Sweetwater River at low flow barrier at SWR 12-July-1999 1620 <0.002 <0.004 <0.003 <0.003 <0.004 Sweetwater River at low flow barrier at SWR 20-Sep-1999 1630 <0.002 <0.004 <0.003 <0.003 <0.004 Perdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 <0.002 <0.004 <0.003 0.020 <0.004 Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 <0.002 <0.004 <0.003 <0.003 <0.004 Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 <0.002 <0.004 <0.003 <0.003 <0.004 Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 <0.002 <0.004 <0.003 <0.003 <0.004 Perdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 <0.002 <0.004 <0.003 <0.003 <0.004 Perdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 <0.002 <0.004 <0.003 <0.003 <0.004 

EPTC Ethalfluralin Ethoprophos Fonofos Lindane 

PCODE 82668 82663 82672 4095 39341 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

70 Table 4 

Parathionmethyl Metolachor Metribuzin Molinate Napropamide p,p′-DDE 

PCODE 82667 39415 82630 82671 82684 34653 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near pump tower 9-Sep-1998 1550 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 9-Sep-1998 1600 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 3-Nov-1998 1030 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 3-Nov-1998 1040 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 6-Jan-1999 0930 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 1-Mar-1999 1030 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 1-Mar-1999 1045 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 3-May-1999 1115 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 3-May-1999 1130 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 12-Jul-1999 1120 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 12-Jul-1999 1130 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 20-Sep-1999 1140 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near pump tower 20-Sep-1999 1150 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 10-Sep-1998 0845 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 10-Sep-1998 0900 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 3-Nov-1998 1110 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 6-Jan-1999 1000 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 1-Mar-1999 1100 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 3-May-1999 1150 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 3-May-1999 1200 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 12-July-1999 1210 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near Vista del Lago station 12-July-1999 1220 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 9-Sep-1998 1630 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 9-Sep-1998 1640 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 3-Nov-1998 1140 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 3-Nov-1998 1150 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 6-Jan-1999 1030 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 1-Mar-1999 1130 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 3-May-1999 1235 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 3-May-1999 1240 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 12-July-1999 1240 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 12-July-1999 1250 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 20-Sep-1999 1220 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR center of minimum pool 20-Sep-1999 1230 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near recreation area 10-Sep-1998 1010 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near recreation area 10-Sep-1998 1020 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near recreation area 3-Nov-1998 1205 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 SWR near recreation area 3-Nov-1998 1215 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

71 Table 4SWR near recreation area 6-Jan-1999 1100 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near recreation area 1-Mar-1999 1220 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near recreation area 3-May-1999 1310 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near recreation area 3-May-1999 1320 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near recreation area 12-July-1999 1320 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near recreation area 12-July-1999 1330 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 10-Sep-1998 1240 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 10-Sep-1998 1250 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 3-Nov-1998 1340 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 6-Jan-1999 1130 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 2-Mar-1999 0840 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 3-May-1999 1350 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 3-May-1999 1400 <0.006 <0.002 <0.004 <0.004 <0.003 SWR minimum pool boundary east 12-July-1999 1420 <0.006 <0.002 <0.004 <0.004 <0.003 SWR east end reservoir fill boundary 10-Sep-1998 1310 <0.006 <0.002 <0.004 <0.004 <0.003 SWR east end reservoir fill boundary 3-Nov-1998 1400 <0.006 <0.002 <0.004 <0.004 <0.003 SWR east end reservoir fill boundary 6-Jan-1999 1150 <0.006 <0.002 <0.004 <0.004 <0.003 SWR east end reservoir fill boundary 3-May-1999 1440 <0.006 <0.002 <0.004 <0.004 <0.003 SWR east end reservoir fill boundary 12-July-1999 1440 <0.006 <0.002 <0.004 <0.004 <0.003 SWR east end reservoir fill boundary 20-Sep-1999 1250 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 10-Sep-1998 0930 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 10-Sep-1998 0940 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 3-Nov-1998 1430 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 6-Jan-1999 1220 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 1-Mar-1999 1310 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 3-May-1999 1510 <0.006 <0.002 <0.004 <0.004 <0.003 SWR near Gum Tree Cove Pond 12-July-1999 1500 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 10-Sep-1998 1610 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 10-Sep-1998 1620 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 4-Nov-1998 1030 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 4-Nov-1998 1040 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 7-Jan-1999 1010 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 2-Mar-1999 1150 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 4-May-1999 1040 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 4-May-1999 1050 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 13-July-1999 1020 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 13-July-1999 1030 <0.006 <0.002 <0.004 <0.004 <0.003 Loveland Reservoir near dam site 1 21-Sep-1999 1000 <0.006 <0.002 <0.010 <0.004 <0.003 Loveland Reservoir near dam site 1 21-Sep-1999 1020 <0.006 <0.002 <0.004 <0.004 <0.003 

Parathionmethyl Metolachor Metribuzin Molinate Napropamide p

PCODE 82667 39415 82630 82671 82684 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

72 Table 4 

Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Sweetwater River at low flow barrier at SWR 6-Jan-1999 1515 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Sweetwater River at low flow barrier at SWR 3-May-1999 1645 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Sweetwater River at low flow barrier at SWR 12-July-1999 1620 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Sweetwater River at low flow barrier at SWR 20-Sep-1999 1630 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Perdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 <0.006 <0.002 <0.004 <0.004 <0.003 <0.006 Perdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 <0.006 0.004 <0.004 <0.004 <0.003 <0.006 Perdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 <0.006 0.005 <0.004 <0.004 <0.003 <0.006 

Parathionmethyl Metolachor Metribuzin Molinate Napropamide p,p′-DDE 

PCODE 82667 39415 82630 82671 82684 34653 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

73 Table 4

Pendimethalin cis- Permethrin Phorate Prometon Propyzamide Pr

PCODE 82683 82687 82664 4037 82676 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near pump tower 9-Sep-1998 1550 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near pump tower 9-Sep-1998 1600 <0.004 <0.005 <0.002 E0.006 <0.003 SWR near pump tower 3-Nov-1998 1030 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near pump tower 3-Nov-1998 1040 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near pump tower 6-Jan-1999 0930 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near pump tower 1-Mar-1999 1030 <0.004 <0.005 <0.002 <0.018 <0.003 SWR near pump tower 1-Mar-1999 1045 <0.004 <0.005 <0.002 <0.018 <0.003 SWR near pump tower 3-May-1999 1115 <0.004 <0.005 <0.002 E0.007 <0.003 SWR near pump tower 3-May-1999 1130 <0.004 <0.005 <0.002 E0.006 <0.003 SWR near pump tower 12-Jul-1999 1120 <0.004 <0.005 <0.002 <0.018 <0.003 SWR near pump tower 12-Jul-1999 1130 <0.004 <0.005 <0.002 <0.018 <0.003 SWR near pump tower 20-Sep-1999 1140 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near pump tower 20-Sep-1999 1150 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near Vista del Lago station 10-Sep-1998 0845 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near Vista del Lago station 10-Sep-1998 0900 <0.004 <0.005 <0.002 E0.006 <0.003 SWR near Vista del Lago station 3-Nov-1998 1110 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near Vista del Lago station 6-Jan-1999 1000 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near Vista del Lago station 1-Mar-1999 1100 <0.004 <0.005 <0.002 <0.018 <0.003 SWR near Vista del Lago station 3-May-1999 1150 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near Vista del Lago station 3-May-1999 1200 <0.004 <0.005 <0.002 E0.007 <0.003 SWR near Vista del Lago station 12-July-1999 1210 <0.004 <0.005 <0.002 <0.018 <0.003 SWR near Vista del Lago station 12-July-1999 1220 <0.004 <0.005 <0.002 E0.005 <0.003 SWR center of minimum pool 9-Sep-1998 1630 <0.004 <0.005 <0.002 E0.008 <0.003 SWR center of minimum pool 9-Sep-1998 1640 <0.004 <0.005 <0.002 E0.006 <0.003 SWR center of minimum pool 3-Nov-1998 1140 <0.004 <0.005 <0.002 E0.007 <0.003 SWR center of minimum pool 3-Nov-1998 1150 <0.004 <0.005 <0.002 E0.008 <0.003 SWR center of minimum pool 6-Jan-1999 1030 <0.004 <0.005 <0.002 E0.008 <0.003 SWR center of minimum pool 1-Mar-1999 1130 <0.004 <0.005 <0.002 <0.018 <0.003 SWR center of minimum pool 3-May-1999 1235 <0.004 <0.005 <0.002 E0.006 <0.003 SWR center of minimum pool 3-May-1999 1240 <0.004 <0.005 <0.002 E0.007 <0.003 SWR center of minimum pool 12-July-1999 1240 <0.004 <0.005 <0.002 <0.018 <0.003 SWR center of minimum pool 12-July-1999 1250 <0.004 <0.005 <0.002 0.005 <0.003 SWR center of minimum pool 20-Sep-1999 1220 <0.004 <0.005 <0.002 0.008 <0.003 SWR center of minimum pool 20-Sep-1999 1230 <0.004 <0.005 <0.002 E0.007 <0.003 SWR near recreation area 10-Sep-1998 1010 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near recreation area 10-Sep-1998 1020 <0.004 <0.005 <0.002 E0.006 <0.003 SWR near recreation area 3-Nov-1998 1205 <0.004 <0.005 <0.002 E0.008 <0.003 SWR near recreation area 3-Nov-1998 1215 <0.004 <0.005 <0.002 E0.007 <0.003 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

74 Table 4 

SWR near recreation area 6-Jan-1999 1100 <0.004 <0.005 <0.002 E0.008 <0.003 <0.007 SWR near recreation area 1-Mar-1999 1220 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 SWR near recreation area 3-May-1999 1310 <0.004 <0.005 <0.002 E0.006 <0.003 <0.007 SWR near recreation area 3-May-1999 1320 <0.004 <0.005 <0.002 E0.006 <0.003 <0.007 SWR near recreation area 12-July-1999 1320 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 SWR near recreation area 12-July-1999 1330 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 SWR minimum pool boundary east 10-Sep-1998 1240 <0.004 <0.005 <0.002 E0.008 <0.003 <0.007 SWR minimum pool boundary east 10-Sep-1998 1250 <0.004 <0.005 <0.002 E0.006 <0.003 <0.007 SWR minimum pool boundary east 3-Nov-1998 1340 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR minimum pool boundary east 6-Jan-1999 1130 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR minimum pool boundary east 2-Mar-1999 0840 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 SWR minimum pool boundary east 3-May-1999 1350 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR minimum pool boundary east 3-May-1999 1400 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR minimum pool boundary east 12-July-1999 1420 <0.004 <0.005 <0.002 E0.005 <0.003 <0.007 SWR east end reservoir fill boundary 10-Sep-1998 1310 <0.004 <0.005 <0.002 E0.006 <0.003 <0.007 SWR east end reservoir fill boundary 3-Nov-1998 1400 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR east end reservoir fill boundary 6-Jan-1999 1150 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR east end reservoir fill boundary 3-May-1999 1440 <0.004 <0.005 <0.002 E0.006 <0.003 <0.007 SWR east end reservoir fill boundary 12-July-1999 1440 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 SWR east end reservoir fill boundary 20-Sep-1999 1250 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR near Gum Tree Cove Pond 10-Sep-1998 0930 <0.004 <0.005 <0.002 E0.008 <0.003 <0.007 SWR near Gum Tree Cove Pond 10-Sep-1998 0940 <0.004 <0.005 <0.002 E0.006 <0.003 <0.007 SWR near Gum Tree Cove Pond 3-Nov-1998 1430 <0.004 <0.005 <0.002 E0.008 <0.003 <0.007 SWR near Gum Tree Cove Pond 6-Jan-1999 1220 <0.004 <0.005 <0.002 E0.007 <0.003 <0.007 SWR near Gum Tree Cove Pond 1-Mar-1999 1310 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 SWR near Gum Tree Cove Pond 3-May-1999 1510 <0.004 <0.005 <0.002 0.007 <0.003 <0.007 SWR near Gum Tree Cove Pond 12-July-1999 1500 <0.004 <0.005 <0.002 E0.005 <0.003 <0.007 Loveland Reservoir near dam site 1 10-Sep-1998 1610 <0.004 <0.005 <0.002 E0.003 <0.003 <0.007 Loveland Reservoir near dam site 1 10-Sep-1998 1620 <0.004 <0.005 <0.002 E0.002 <0.003 <0.007 Loveland Reservoir near dam site 1 4-Nov-1998 1030 <0.004 <0.005 <0.002 E0.004 <0.003 <0.007 Loveland Reservoir near dam site 1 4-Nov-1998 1040 <0.004 <0.005 <0.002 E0.004 <0.003 <0.007 Loveland Reservoir near dam site 1 7-Jan-1999 1010 <0.004 <0.005 <0.002 E0.003 <0.003 <0.007 Loveland Reservoir near dam site 1 2-Mar-1999 1150 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 Loveland Reservoir near dam site 1 4-May-1999 1040 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 Loveland Reservoir near dam site 1 4-May-1999 1050 <0.004 <0.005 <0.002 E0.004 <0.003 <0.007 Loveland Reservoir near dam site 1 13-July-1999 1020 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 Loveland Reservoir near dam site 1 13-July-1999 1030 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 Loveland Reservoir near dam site 1 21-Sep-1999 1000 <0.004 <0.005 <0.002 <0.018 <0.003 <0.007 Loveland Reservoir near dam site 1 21-Sep-1999 1020 <0.004 <0.005 <0.002 E0.005 <0.003 <0.007 

Pendimethalin cis- Permethrin Phorate Prometon Propyzamide Propachlo

PCODE 82683 82687 82664 4037 82676 4024 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

75 Table 4Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 <0.004 <0.005 <0.002 E0.003 <0.003 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 <0.004 <0.005 <0.002 E0.002 <0.003 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 <0.004 <0.005 <0.002 E0.004 <0.003 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 <0.004 <0.005 <0.002 <0.018 <0.003 Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 <0.004 <0.005 <0.002 E0.003 <0.003 Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 <0.004 <0.005 <0.002 <0.018 <0.003 Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 <0.004 <0.005 <0.002 <0.018 <0.003 Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 <0.004 <0.005 <0.002 <0.018 <0.003 Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 <0.004 <0.005 <0.002 <0.018 <0.003 Sweetwater River at low flow barrier at SWR 6-Jan-1999 1515 <0.004 <0.005 <0.002 <0.018 <0.003 Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 <0.004 <0.005 <0.002 E0.003 <0.003 Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 <0.004 <0.005 <0.002 E0.012 <0.003 Sweetwater River at low flow barrier at SWR 3-May-1999 1645 <0.004 <0.005 <0.002 E0.012 <0.003 Sweetwater River at low flow barrier at SWR 12-July-1999 1620 <0.004 <0.005 <0.002 <0.018 <0.003 Sweetwater River at low flow barrier at SWR 20-Sep-1999 1630 <0.004 <0.005 <0.002 E0.007 <0.003 Perdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 <0.004 <0.005 <0.002 E0.008 <0.003 Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 <0.004 <0.005 <0.002 <0.020 <0.003 Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 <0.004 <0.005 <0.002 E0.007 <0.003 Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 <0.004 <0.005 <0.002 E0.004 <0.003 Perdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 <0.004 <0.005 <0.002 <0.018 <0.003 Perdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 <0.004 <0.005 <0.002 <0.018 <0.003 

Pendimethalin cis- Permethrin Phorate Prometon Propyzamide Pr

PCODE 82683 82687 82664 4037 82676 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

76 Table 4 

Simazine Tebuthiuron Terbucil Terbufos Thiobencarb Triallate 

PCODE 4035 82670 82665 82675 82681 82678 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near pump tower 9-Sep-1998 1550 0.024 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 9-Sep-1998 1600 0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 3-Nov-1998 1030 0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 3-Nov-1998 1040 0.019 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 6-Jan-1999 0930 0.018 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 1-Mar-1999 1030 <0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 1-Mar-1999 1045 <0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 3-May-1999 1115 0.014 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 3-May-1999 1130 0.014 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 12-Jul-1999 1120 0.015 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 12-Jul-1999 1130 0.011 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 20-Sep-1999 1140 0.016 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near pump tower 20-Sep-1999 1150 0.014 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 10-Sep-1998 0845 0.022 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 10-Sep-1998 0900 0.019 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 3-Nov-1998 1110 0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 6-Jan-1999 1000 0.017 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 1-Mar-1999 1100 0.016 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 3-May-1999 1150 0.017 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 3-May-1999 1200 0.016 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 12-July-1999 1210 0.009 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near Vista del Lago station 12-July-1999 1220 0.011 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 9-Sep-1998 1630 0.024 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 9-Sep-1998 1640 0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 3-Nov-1998 1140 0.019 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 3-Nov-1998 1150 0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 6-Jan-1999 1030 0.016 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 1-Mar-1999 1130 <0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 3-May-1999 1235 0.012 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 3-May-1999 1240 0.017 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 12-July-1999 1240 <0.010 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 12-July-1999 1250 0.011 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 20-Sep-1999 1220 0.016 <0.01 <0.007 <0.013 <0.002 <0.001 SWR center of minimum pool 20-Sep-1999 1230 0.014 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near recreation area 10-Sep-1998 1010 0.021 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near recreation area 10-Sep-1998 1020 0.017 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near recreation area 3-Nov-1998 1205 0.020 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near recreation area 3-Nov-1998 1215 0.018 <0.01 <0.007 <0.013 <0.002 <0.001 SWR near recreation area 6-Jan-1999 1100 0.017 <0.01 <0.007 <0.013 <0.002 <0.001 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

77 Table 4SWR near recreation area 1-Mar-1999 1220 <0.020 <0.01 <0.007 <0.013 <0.002 SWR near recreation area 3-May-1999 1310 0.012 <0.01 <0.007 <0.013 <0.002 SWR near recreation area 3-May-1999 1320 0.014 <0.01 <0.007 <0.013 <0.002 SWR near recreation area 12-July-1999 1320 0.013 <0.01 <0.007 <0.013 <0.002 SWR near recreation area 12-July-1999 1330 0.010 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 10-Sep-1998 1240 0.022 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 10-Sep-1998 1250 0.017 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 3-Nov-1998 1340 0.019 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 6-Jan-1999 1130 0.017 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 2-Mar-1999 0840 <0.005 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 3-May-1999 1350 0.016 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 3-May-1999 1400 0.017 <0.01 <0.007 <0.013 <0.002 SWR minimum pool boundary east 12-July-1999 1420 0.013 <0.01 <0.007 <0.013 <0.002 SWR east end reservoir fill boundary 10-Sep-1998 1310 0.016 <0.01 <0.007 <0.013 <0.002 SWR east end reservoir fill boundary 3-Nov-1998 1400 0.019 <0.01 <0.007 <0.013 <0.002 SWR east end reservoir fill boundary 6-Jan-1999 1150 0.018 <0.01 <0.007 <0.013 <0.002 SWR east end reservoir fill boundary 3-May-1999 1440 0.015 <0.01 <0.007 <0.013 <0.002 SWR east end reservoir fill boundary 12-July-1999 1440 0.005 <0.01 <0.007 <0.013 <0.002 SWR east end reservoir fill boundary 20-Sep-1999 1250 0.014 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0930 0.022 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 10-Sep-1998 0940 0.019 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 3-Nov-1998 1430 0.019 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 6-Jan-1999 1220 0.017 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 1-Mar-1999 1310 <0.020 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 3-May-1999 1510 0.012 <0.01 <0.007 <0.013 <0.002 SWR near Gum Tree Cove Pond 12-July-1999 1500 0.015 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1610 0.023 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 10-Sep-1998 1620 0.006 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1030 0.023 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 4-Nov-1998 1040 0.010 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 7-Jan-1999 1010 0.013 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 2-Mar-1999 1150 <0.020 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1040 0.012 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 4-May-1999 1050 0.014 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1020 0.011 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 13-July-1999 1030 0.010 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 21-Sep-1999 1000 0.011 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir near dam site 1 21-Sep-1999 1020 0.012 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 0.021 <0.01 <0.007 <0.013 <0.002 Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 0.006 <0.01 <0.007 <0.013 <0.002 

Simazine Tebuthiuron Terbucil Terbufos Thiobencarb T

PCODE 4035 82670 82665 82675 82681 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

78 Table 4 

Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 0.019 <0.01 <0.007 <0.013 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 0.010 <0.01 <0.007 <0.013 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 0.013 <0.01 <0.007 <0.013 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 <0.020 <0.01 <0.007 <0.013 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 0.010 <0.01 <0.007 <0.013 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 0.012 <0.01 <0.007 <0.013 <0.002 <0.001 Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 0.012 <0.01 <0.007 <0.013 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 6-Jan-1999 1515 0.007 <0.01 <0.007 <0.013 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 0.011 <0.01 <0.007 <0.013 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 <0.010 <0.01 <0.007 <0.013 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 3-May-1999 1645 0.007 E0.01 <0.007 <0.013 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 12-July-1999 1620 <0.005 <0.01 <0.007 <0.013 <0.002 <0.001 Sweetwater River at low flow barrier at SWR 20-Sep-1999 1630 <0.005 <0.01 <0.007 <0.013 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 0.016 <0.01 <0.007 <0.013 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 <0.005 <0.01 <0.007 <0.013 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 0.015 <0.01 <0.007 <0.013 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 0.012 <0.01 <0.007 <0.013 <0.002 <0.001 Perdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 0.009 <0.01 <0.007 <0.013 <0.002 <0.001 Perdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 0.008 <0.01 <0.007 <0.013 <0.002 <0.001 

Simazine Tebuthiuron Terbucil Terbufos Thiobencarb Triallate 

PCODE 4035 82670 82665 82675 82681 82678 

Site name Date Time (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) (μg/L) 
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

79 Table 4

Diazinon-d10

(surrogate)

alpha-HCH-d6

(surrogate)

Terbuthylazine 

(surrogate)

PCODE 91063 91065 91064

Site name Date Time (%) (%) (%)

SWR near pump tower 9-Sep-1998 1550 97 107 104SWR near pump tower 9-Sep-1998 1600 92 93 99SWR near pump tower 3-Nov-1998 1030 96 89 105SWR near pump tower 3-Nov-1998 1040 99 88 100SWR near pump tower 6-Jan-1999 0930 112 100 114SWR near pump tower 1-Mar-1999 1030 104 106 129SWR near pump tower 1-Mar-1999 1045 112 112 117SWR near pump tower 3-May-1999 1115 99 86 91SWR near pump tower 3-May-1999 1130 100 87 92SWR near pump tower 12-Jul-1999 1120 88 85 NASWR near pump tower 12-Jul-1999 1130 87 78 NASWR near pump tower 20-Sep-1999 1140 102 87 NASWR near pump tower 20-Sep-1999 1150 107 84 NASWR near Vista del Lago station 10-Sep-1998 0845 98 98 100SWR near Vista del Lago station 10-Sep-1998 0900 91 94 103SWR near Vista del Lago station 3-Nov-1998 1110 98 87 101SWR near Vista del Lago station 6-Jan-1999 1000 107 95 107SWR near Vista del Lago station 1-Mar-1999 1100 96 97 100SWR near Vista del Lago station 3-May-1999 1150 129 128 121SWR near Vista del Lago station 3-May-1999 1200 98 90 99SWR near Vista del Lago station 12-July-1999 1210 100 76 NASWR near Vista del Lago station 12-July-1999 1220 101 88 NASWR center of minimum pool 9-Sep-1998 1630 98 103 104SWR center of minimum pool 9-Sep-1998 1640 96 106 103SWR center of minimum pool 3-Nov-1998 1140 90 87 95SWR center of minimum pool 3-Nov-1998 1150 97 87 97SWR center of minimum pool 6-Jan-1999 1030 102 90 104SWR center of minimum pool 1-Mar-1999 1130 95 99 110SWR center of minimum pool 3-May-1999 1235 96 84 97SWR center of minimum pool 3-May-1999 1240 121 114 118SWR center of minimum pool 12-July-1999 1240 99 89 NASWR center of minimum pool 12-July-1999 1250 98 90 NASWR center of minimum pool 20-Sep-1999 1220 107 87 NASWR center of minimum pool 20-Sep-1999 1230 99 75 NASWR near recreation area 10-Sep-1998 1010 90 89 102SWR near recreation area 10-Sep-1998 1020 94 91 100SWR near recreation area 3-Nov-1998 1205 98 87 99
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continued

80 Table 4 

SWR near recreation area 3-Nov-1998 1215 98 85 100SWR near recreation area 6-Jan-1999 1100 103 94 107SWR near recreation area 1-Mar-1999 1220 101 103 120SWR near recreation area 3-May-1999 1310 103 89 90SWR near recreation area 3-May-1999 1320 99 91 96SWR near recreation area 12-July-1999 1320 87 77 NASWR near recreation area 12-July-1999 1330 89 77 NASWR minimum pool boundary east 10-Sep-1998 1240 99 97 99SWR minimum pool boundary east 10-Sep-1998 1250 99 92 102SWR minimum pool boundary east 3-Nov-1998 1340 98 87 98SWR minimum pool boundary east 6-Jan-1999 1130 105 93 106SWR minimum pool boundary east 2-Mar-1999 840 102 97 116SWR minimum pool boundary east 3-May-1999 1350 96 86 94SWR minimum pool boundary east 3-May-1999 1400 94 91 99SWR minimum pool boundary east 12-July-1999 1420 106 74 NASWR east end reservoir fill boundary 10-Sep-1998 1310 84 80 86SWR east end reservoir fill boundary 3-Nov-1998 1400 102 91 101SWR east end reservoir fill boundary 6-Jan-1999 1150 106 97 112SWR east end reservoir fill boundary 3-May-1999 1440 86 82 87SWR east end reservoir fill boundary 12-July-1999 1440 79 75 NASWR east end reservoir fill boundary 20-Sep-1999 1250 107 82 NASWR near Gum Tree Cove Pond 10-Sep-1998 0930 97 94 100SWR near Gum Tree Cove Pond 10-Sep-1998 940 99 96 105SWR near Gum Tree Cove Pond 3-Nov-1998 1430 100 88 101SWR near Gum Tree Cove Pond 6-Jan-1999 1220 100 93 107SWR near Gum Tree Cove Pond 1-Mar-1999 1310 118 106 134SWR near Gum Tree Cove Pond 3-May-1999 1510 92 78 83SWR near Gum Tree Cove Pond 12-July-1999 1500 110 82 NALoveland Reservoir near dam site 1 10-Sep-1998 1610 92 89 95Loveland Reservoir near dam site 1 10-Sep-1998 1620 97 92 101Loveland Reservoir near dam site 1 4-Nov-1998 1030 97 89 97Loveland Reservoir near dam site 1 4-Nov-1998 1040 97 89 96Loveland Reservoir near dam site 1 7-Jan-1999 1010 102 92 106Loveland Reservoir near dam site 1 2-Mar-1999 1150 109 103 121Loveland Reservoir near dam site 1 4-May-1999 1040 99 88 99Loveland Reservoir near dam site 1 4-May-1999 1050 102 89 99Loveland Reservoir near dam site 1 13-July-1999 1020 101 87 NALoveland Reservoir near dam site 1 13-July-1999 1030 96 75 NA

Diazinon-d10

(surrogate)

alpha-HCH-d6

(surrogate)

Terbuthylazine 

(surrogate)

PCODE 91063 91065 91064

Site name Date Time (%) (%) (%)
Table 4. Analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, California—Continu

81 Table 4Loveland Reservoir near dam site 1 21-Sep-1999 1000 96 90 NALoveland Reservoir near dam site 1 21-Sep-1999 1020 104 87 NALoveland Reservoir east end near source inlet site 2 10-Sep-1998 1650 98 94 102Loveland Reservoir east end near source inlet site 2 10-Sep-1998 1700 96 91 100Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1155 96 92 94Loveland Reservoir east end near source inlet site 2 4-Nov-1998 1205 106 98 108Loveland Reservoir east end near source inlet site 2 7-Jan-1999 1035 102 92 107Loveland Reservoir east end near source inlet site 2 2-Mar-1999 1220 100 107 116Loveland Reservoir east end near source inlet site 2 4-May-1999 1120 96 84 95Loveland Reservoir east end near source inlet site 2 4-May-1999 1130 123 120 120Loveland Reservoir east end near source inlet site 2 13-July-1999 1100 96 72 NASweetwater River at low flow barrier at SWR 6-Jan-1999 1515 105 97 110Sweetwater River at low flow barrier at SWR 7-Jan-1999 1420 109 100 110Sweetwater River at low flow barrier at SWR 2-Mar-1999 1540 104 101 117Sweetwater River at low flow barrier at SWR 3-May-1999 1645 87 84 90Sweetwater River at low flow barrier at SWR 12-July-1999 1620 107 88 NASweetwater River at low flow barrier at SWR 20-Sep-1999 1630 107 80 NAPerdue Treatment Plant—finished water at SWR 7-Jan-1999 1350 94 97 106Perdue Treatment Plant—finished water at SWR 2-Mar-1999 1630 98 98 123Perdue Treatment Plant—finished water at SWR 3-May-1999 1607 94 87 104Perdue Treatment Plant—finished water at SWR 12-July-1999 1700 84 78 NAPerdue Treatment Plant—finished water at SWR 20-Sep-1999 1430 99 87 NAPerdue Treatment Plant—imported raw water at SWR 20-Sep-1999 1500 104 80 NA

Diazinon-d10

(surrogate)

alpha-HCH-d6

(surrogate)

Terbuthylazine 

(surrogate)

PCODE 91063 91065 91064

Site name Date Time (%) (%) (%)
82 Table 5A 

Table 5A. Analytical results for chlorofluorocarbons and other compounds with low breakthrough volumes for the Sweetwater Reservoir air sampling site, San [The site identification number is 324141117001601. An "E" indicates that the value has been estimated because of interference or is below method report

below each compound is its parameter code (PCODE). ND, not detected; NA, not analyzed. pbbv, part per billion by volume] 

Chloroethane Bromomethane Chloromethane Trichlorofluoro- methane (CFC11) Dichlorodifluoro- methane (CFC12) Chloroethene (Vinyl chloride) Bromoet

(Vinyl bro

PCODE 34311 34413 34418 34488 34668 39175 5000

Date ppbv ppbv ppbv ppbv ppbv ppbv ppb

24-Mar-1999 ND E0.260 E0.183 0.464 0.203 ND N

5-Apr-1999 ND ND ND 0.294 0.744 ND N

17-Apr-1999 ND ND ND 0.403 0.629 ND N29-Apr-1999 Sample lost

11-May-1999 ND ND E0.121 E0.335 0.516 ND N23-May-1999 ND ND ND E0.327 0.720 ND N

4-Jun-1999 ND ND ND 0.410 0.535 ND N

16-Jun-1999 ND ND E0.059 E0.212 0.445 ND N28-Jun-1999 ND ND E0.069 E0.203 0.606 ND N

10-Jul-1999 ND ND ND E0.260 0.541 ND N22-Jul-1999 ND ND ND E0.236 0.677 ND N

3-Aug-1999 ND ND ND 0.624 0.634 ND N

15-Aug-1999 ND ND ND E0.228 0.566 ND N27-Aug-1999 Sample lost

6-Sep-1999 ND ND E0.040 E0.324 0.614 ND N

20-Sep-1999 ND ND ND E0.320 0.544 ND N
83 Table 5B

Table 5B. Analytical results for the remaining volatile organic compound analytes for the Sweetwater Reservoir air sampling site, San Diego County, Ca[The site identification number is 324141117001601. VOC, volatile organic compound. An "E" indicates that the value has been estimated becaus

method reporting limits. The number given below a compound is its parameter code (PCODE). Calif., California; SWR, Sweetwater Reservoir; ND, no

pbbv, part per billion by volume]
 the remaining VOC analytes for the SWR air sampling site, San Diego County, Calif.—Continued

Bromodichloro-methane

Carbontetrachloride

1,2-Dichloroethane

Bromoform

Dibromochloro-methane

Chloroform

Toluene

Benzene

2-Propenenitrile (Acrylonitrile)

Chlorobenzene

Ethylbenzene

Hexachloroethane

Methylenechloride

Tetrachloroethene (PCE)

101 32102 32103 32104 32105 32106 34010 34030 34215 34301 34371 34396 34423 34475

bv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv

D E0.103 E0.010 ND ND E0.029 0.524 0.286 ND E0.003 E0.070 ND E0.078 0.095

D E0.116 E0.007 ND ND E0.015 0.569 0.401 ND E0.002 0.110 ND ND E0.037

D E0.109 E0.009 ND ND E0.044 1.133 1.252 ND E0.004 0.207 ND 0.162 E0.057

D 0.156 E0.003 ND ND E0.010 0.762 0.487 ND ND 0.105 ND ND E0.033D E0.129 E0.008 ND ND E0.023 0.697 0.280 ND ND 0.087 ND ND E0.019

D E0.062 E0.002 ND ND E0.007 0.106 ND ND ND E0.019 ND ND E0.004D E0.139 ND ND ND ND 0.495 0.537 ND ND 0.082 ND ND E0.016D E0.081 ND ND ND E0.008 0.592 0.294 ND ND 0.101 ND ND E0.013

D E0.079 ND ND ND E0.019 0.657 0.232 ND ND 0.096 ND ND E0.018

016 E0.078 ND ND ND E0.044 1.030 0.334 ND ND 0.173 ND E0.029 E0.030

005 E0.069 E0.001 ND E0.004 E0.005 1.329 0.421 ND ND 0.203 ND ND E0.041001 E0.100 E0.001 ND ND E0.003 0.432 0.157 ND ND E0.061 ND ND E0.008

D E0.075 ND ND ND E0.003 0.859 ND ND ND 0.147 ND ND E0.024

001 E0.078 ND ND ND E0.017 0.834 0.263 ND ND 0.117 ND ND E0.026

D E0.083 ND ND ND E0.020 1.035 0.333 ND ND 0.187 ND ND E0.034

Sample lost
 the remaining VOC analytes for the SWR air sampling site, San Diego County, Calif.—Continued

1,1-Dichloroethene

1,1,1-Trichloro-ethane

1,1,2-Trichloro-ethane

1,1,2,2-Tetrachloro-ethane

1,2-Dichlorobenzene

1,2-Dichloropropane

trans -1,2-Dichloro-ethene

1,2,4-Trichloro benzene

1,3-Dichlorobenzene

1,4-Dichlorobenzene

Naphthalene

trans -1,3-Dichloro-propene

cis -1,3-Dichloro-propene

Trichloroethene (TCE)

501 34506 34511 34516 34536 34541 34546 34551 34566 34571 34696 34699 34704 39180

bv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv

D 0.074 ND ND ND ND ND ND ND E0.017 E0.006 ND ND E0.009D 0.075 ND ND ND ND ND ND ND E0.018 E0.012 ND ND E0.001D 0.091 ND ND ND ND ND ND ND E0.054 E0.027 ND ND E0.018D 0.085 ND ND ND ND ND ND ND E0.020 E0.027 ND ND E0.003D 0.090 ND ND ND ND ND ND ND E0.015 E0.013 ND ND E0.002D E0.039 ND ND ND ND ND ND ND E0.002 E0.002 ND ND ND

046 E0.050 ND ND ND ND ND ND ND E0.010 E0.054 ND ND E0.009

D E0.056 ND ND ND ND ND ND ND E0.017 E0.025 ND ND NDD E0.055 ND ND ND ND ND ND ND E0.016 E0.019 ND ND E0.035D 0.072 ND ND ND ND ND ND ND E0.036 E0.040 ND ND E0.004D 0.067 ND ND ND ND ND ND ND E0.047 E0.034 ND ND E0.026D E0.042 ND ND ND ND ND ND ND E0.013 E0.009 ND ND E0.0004D E0.047 ND ND ND ND ND ND ND E0.032 E0.038 ND ND E0.009D E0.059 ND ND ND ND ND ND ND E0.020 E0.017 ND ND E0.001D E0.062 ND ND ND ND ND ND ND E0.033 E0.034 ND ND E0.004

Sample lost
 the remaining VOC analytes for the SWR air sampling site, San Diego County, Calif.—Continued

Methylacrylate

1,2,3,4-Tetramethyl-benzene

Ethyl tert-butyl ether (ETBE)

tert -Amylmethylether (TAME)

trans -1,4-Dichloro-2-butene

Ethylmethacrylate

Carbondisulfide

cis -1,2-Dichloro-ethene

2-Hexanone (MBK)

Ethenylbenzene (Styrene)

O -Xylene

1,1-Dichloropropene

2,2-Dichloropropane

1,3-Dichloropropane

991 49999 50004 50005 73547 73570 77041 77093 77103 77128 77135 77168 77170 77173

bv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv

D E0.001 ND E0.002 ND ND E0.005 ND E0.010 E0.014 0.088 ND ND NDD E0.001 ND ND ND ND E0.010 ND E0.008 E0.062 0.144 ND ND NDD E0.003 ND E0.003 ND ND E0.093 ND E0.012 E0.043 0.264 ND ND NDD E0.002 ND ND ND ND E0.018 ND E0.008 E0.017 0.128 ND ND NDD E0.001 ND ND ND ND ND ND E0.009 E0.007 0.107 ND ND NDD ND ND ND ND ND ND ND E0.002 E0.003 E0.023 ND ND NDD E0.003 ND ND ND ND E0.051 ND ND E0.011 0.095 ND ND NDD E0.001 ND ND ND ND E0.008 ND E0.006 E0.012 0.117 ND ND NDD E0.002 ND ND ND ND ND ND E0.011 E0.018 0.127 ND ND NDD E0.002 ND ND ND ND ND ND E0.012 E0.027 0.226 ND ND NDD E0.004 ND E0.002 ND ND ND ND E0.006 E0.033 0.267 ND ND NDD E0.0005 ND E0.003 ND ND ND ND E0.006 E0.006 0.085 ND ND NDD E0.003 ND E0.005 ND ND E0.020 ND E0.007 E0.027 0.193 ND ND NDD E0.001 ND E0.006 ND ND ND ND E0.010 E0.013 0.148 ND ND NDD E0.003 ND E0.005 ND ND ND ND E0.009 E0.022 0.235 ND ND ND

Sample lost
 the remaining VOC analytes for the SWR air sampling site, San Diego County, Calif.—Continued

1,2,3-Trimethyl-benzene

1,2,4-Trimethyl-benzene

Isopropylbenzene (Cumene)

N -propylbenzene

1,3,5-Trimethyl-benzene

1-Chloro-2-methyl-benzene

1-Chloro-4-methyl-benzene

Bromochloro methane

N -Butylbenzene

sec -Butylbenzene

tert -Butylbenzene

1-Isopropyl-4-methyl-benzene

1,2,3-Trichloro-propane

1,1,1,2-Tetrachloro-ethane

221 77222 77223 77224 77226 77275 77277 77297 77342 77350 77353 77356 77443 77562

bv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv

010 E0.060 E0.003 E0.012 E0.017 ND ND ND E0.001 E0.001 ND E0.002 ND ND011 E0.064 E0.006 E0.013 E0.016 ND ND ND E0.002 ND ND E0.003 ND ND027 0.120 E0.010 E0.024 E0.033 ND ND ND E0.005 E0.002 ND E0.008 ND ND022 0.111 E0.005 E0.017 E0.026 ND ND ND E0.006 E0.001 ND E0.008 ND ND011 0.074 E0.003 E0.017 E0.020 ND ND ND E0.001 E0.001 ND E0.003 ND E0.024002 E0.016 E0.001 E0.004 E0.004 ND ND ND ND ND ND E0.002 ND ND022 0.125 E0.002 E0.017 E0.020 ND ND ND E0.005 ND ND E0.006 ND ND023 0.107 E0.004 E0.022 E0.026 ND ND ND E0.003 E0.001 ND E0.007 ND ND016 0.111 E0.005 E0.022 E0.029 ND ND ND E0.003 E0.001 ND E0.018 ND ND042 0.192 E0.006 E0.034 E0.052 ND ND ND E0.005 E0.002 ND E0.031 ND ND043 0.227 E0.009 E0.041 E0.060 ND ND ND E0.007 E0.003 ND E0.045 ND ND011 E0.067 E0.003 E0.014 E0.016 ND ND ND E0.001 E0.0004 ND E0.007 ND ND049 0.243 E0.010 E0.047 E0.065 ND ND ND E0.008 E0.003 ND E0.051 ND ND023 0.121 E0.005 E0.024 E0.033 E0.001 ND ND E0.004 E0.001 ND E0.016 ND ND046 0.237 E0.010 E0.043 E0.067 ND ND ND E0.006 E0.002 ND E0.016 ND ND

Sample lost
 the remaining VOC analytes for the SWR air sampling site, San Diego County, Calif.—Continued

1,2-Dibromoethane 

Methyl tert -butylether (MTBE)

3-Chloro-1-propene

4-Methyl-2-pentanone (MIBK)

Acetone

Bromobenzene

Diethyl ether

Diisopropylether (DIPE)

Methylacrylonitrile

2-Butanone (Methyl ethyl 

ketone)

Methylmethacrylate

Tetrahydrofran

1,2-Dibromo-3-chloro-propane 

(DBCP)

651 78032 78109 78133 81552 81555 81576 81577 81593 81595 81597 81607 82625

bv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv ppbv

D 0.478 ND E0.020 NA ND ND ND ND 0.164 ND E0.020 NDD 0.493 ND E0.016 NA ND ND ND ND E0.124 ND ND NDD 1.459 ND E0.029 NA ND ND ND ND 0.335 ND E0.009 NDD 0.482 ND E0.017 NA ND ND ND ND 0.147 ND ND NDD 0.843 ND E0.013 NA ND ND ND ND 0.228 ND ND NDD 0.124 ND E0.003 NA ND ND ND ND E0.024 ND ND NDD 0.526 ND E0.011 NA ND ND ND ND E0.064 ND ND NDD 0.622 ND E0.013 NA ND ND ND ND 0.196 ND ND NDD 0.871 ND E0.026 NA ND ND ND ND 0.258 ND ND NDD 1.427 ND E0.025 NA ND ND ND ND 0.251 ND ND NDD 1.759 ND E0.026 NA ND ND ND ND 0.227 ND ND NDD 0.641 ND E0.007 NA E0.001 ND ND ND 0.186 ND ND NDD 1.108 ND E0.034 ND ND ND ND ND 0.213 ND ND NDD 1.154 0.140 E0.022 1.224 E0.007 ND ND ND 0.244 ND E0.002 NDD 1.339 ND E0.029 1.107 ND ND ND ND 0.377 ND E0.003 ND

Sample lost
 the remaining VOC analytes for the SWR air sampling site, San Diego County, Calif.—Continued

1,2,3,5Tetramethylbenzene

1,2,4,5-Tetramethyl-benzene

Methylacetate

tert -Amylalcohol

tert -Butylalcohol

bv ppbv ppbv ppbv ppbv

002 E0.002 E0.004 E0.005 E0.112004 E0.003 ND ND E0.044009 E0.007 E0.015 E0.007 0.148009 E0.007 ND ND E0.040003 E0.002 ND E0.003 E0.029

D ND ND ND E0.004

013 E0.010 ND ND ND005 E0.004 ND ND E0.035007 E0.004 ND ND E0.073013 E0.008 ND ND 0.139015 E0.010 ND E0.004 E0.117003 E0.002 E0.012 E0.003 E0.027012 E0.008 ND E0.001 E0.092006 E0.004 ND E0.003 E0.097013 E0.010 E0.014 E0.006 E0.155

Sample lost
90 Table 6

Table 6. Analytical results for pesticide concentrations from the Sweetwater Reservoir air sampling site, San Diego County, California [The site identification number is 324141117001601. Air sampling results for pesticides in nanogram per cubic meter (ng/m3). GFF, glass fiber fil

ND, not detected; NA, not analyzed; %, percentage recovery; m3, cubic meter; g, gram; ng/m3, nanogram per cubic meter]
esticide concentrations from the Sweetwater Reservoir air sampling site, San Diego County, California—Continued

Air 

volume 

(m3

)

Particle 

weight 

(g)

Total 

suspended 

particles 

(μg/m3

)

2,6-Diethyl-analine

Acetochlor

Alachlor

alpha-HCH

Atrazine

Benfluralin

Butylate

Carbaryl (estimated)

Carbofuran 

(estimated)

(ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

)

261.8 0.0153 58.4 ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

268.1 0.0099 36.9 ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

252.9 0.0117 46.3 ND ND ND ND ND ND ND ND ND

NA NA NA NA NA NA NA NA NA

NA NA NA NA NA NA NA NA NA

220.44 0.0065 29.5 ND ND ND ND ND ND ND 0.16 ND

ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

228.14 0.0018 7.9 ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

261.46 0.0083 31.7 ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

253.69 0.0099 39.0 ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND
esticide concentrations from the Sweetwater Reservoir air sampling site, San Diego County, California—Continued

Chlorpyrifos

Cyanazine

Dacthal

Desipropyl atrazine

Diazinon

Dieldrin

Dimethoate

Disulfoton

Endosulfan I

Endosulfan II

Endosulfan sulfate

EPTC

(ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

)

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND ND

0.37 ND ND ND ND ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDNA NA NA NA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NA NA NA NAND ND ND ND 0.08 ND ND ND ND ND ND ND

0.57 ND 0.07 ND 1.30 ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND ND

0.41 ND 0.10 ND 1.67 ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND ND

1.02 ND 0.09 ND 2.04 ND ND ND ND ND ND ND

ND ND ND ND 0.16 ND ND ND ND ND ND ND

ND ND ND ND 0.24 ND ND ND ND ND ND ND

0.65 ND 0.07 ND 1.24 ND ND ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND ND
esticide concentrations from the Sweetwater Reservoir air sampling site, San Diego County, California—Continued

Ethalfluralin

Ethion

Ethoprophos

Fonofos

Lindane

Linuron

Malathion

Azinphos-methyl

Methyl parathion

Metolachlor

Metribuzin

Molinate

(ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

)

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDNA NA NA NA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NA NA NA NAND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND 0.32 ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND 0.32 ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND 0.56 ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND 0.13 ND ND ND ND ND

ND ND ND ND ND ND 0.30 ND ND ND ND ND

ND ND ND ND ND ND ND ND ND ND ND ND
esticide concentrations from the Sweetwater Reservoir air sampling site, San Diego County, California—Continued

Napropamide

p,p '-DDE

Parathion

Pebulate

Pendimethilan

cis -Permethrin

Phorate

Prometon

Pronamide

Propachlor

Propanil

Propargite

(ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

)

ND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDNA NA NA NA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NA NA NA NAND ND ND ND ND ND ND ND ND ND ND NDND 0.06 ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND 0.07 ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND 0.08 ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND NDND 0.05 ND ND ND ND ND ND ND ND ND NDND ND ND ND ND ND ND ND ND ND ND ND
esticide concentrations from the Sweetwater Reservoir air sampling site, San Diego County, California—Continued

Simazine

Tebuthiuron

Terbacil

Terbufos

Thiobencarb

Triallate

Trifluralin

alpha-HCH-d 6 

Diazinon-d 10 

(ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (ng/m3

) (%) (%)

ND ND ND ND ND ND ND 28 59ND ND ND ND ND ND ND 48 80ND ND ND ND ND ND ND 47 85ND ND ND ND ND ND ND 19 31ND ND ND ND ND ND ND 47 82ND ND ND ND ND ND ND 40 79ND ND ND ND ND ND ND 29 41NA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NAND ND ND ND ND ND ND 59 64ND ND ND ND ND ND ND 60 69ND ND ND ND ND ND ND 59 59ND ND ND ND ND ND ND 61 65ND ND ND ND ND ND ND 64 78ND ND ND ND ND ND ND 68 80ND ND ND ND ND ND ND 67 67ND ND ND ND ND ND ND 68 70ND ND ND ND ND ND ND 68 95ND ND ND ND ND ND ND 61 68ND ND ND ND ND ND 0.07 61.0 85.0

ND ND ND ND ND ND ND 65.0 79.0
96 Table 7

Table 7. Analytical results for polynuclear aromatic hydrocarbon compound concentrations in core segments and reservoir and urban runoff divers

sediment samples, Sweetwater Reservoir, San Diego County, California

[An “E” indicates that the value has been estimated because of interference or is below method reporting limits. The number given below the com

(PCODE). Calif., California; ID, identification; SWR, Sweetwater Reservoir; surf, surficial sample; NA, not analyzed; PAHs, polynuclear aromatic 

runoff diversion system; %, percentage recovery; <, compound was not detected at a concentration above the reporting level; μg/kg, microgram per kil
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

Phenol

p -Cresol

C8-alkyl-phenol

Naphthalene

C1-128 isomers

2-Ethyl-naphthalene

2,6-Dimethylnaphthalene

PCODE 49413 49451 49402 49948 49406

Type (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

24-Sep-1998 324161116599401 core E20.7 E33.3 NA E8.0 <30 <30 16224-Sep-1998 324161116599401 core E12.6 E25.2 NA E5.4 <20 <20 11424-Sep-1998 324161116599401 core E8.6 E45.5 NA E5.8 20.0 <10 91.224-Sep-1998 324161116599401 core E15.2 E57.8 NA E11.7 31.2 <20 15824-Sep-1998 324161116599401 core 15.7 23.1 NA E7.5 33.7 <10 19624-Sep-1998 324161116599401 core 11.0 10.6 NA E2.3 11.2 <10 13424-Sep-1998 324161116599401 core E5.9 E18.2 NA E2.5 <10 <10 60.024-Sep-1998 324161116599401 core E8.3 E6.0 NA E1.7 E5.2 <10 32.324-Sep-1998 324161116599401 core E11.9 E13.9 NA E5.8 E14.2 <10 90.824-Sep-1998 324161116599401 core E6.2 E4.1 NA E1.8 <10 <10 37.524-Sep-1998 324161116599401 core 16.4 E5.4 NA E2.2 E7.2 <10 77.824-Sep-1998 324161116599401 core 27.5 E7.6 NA E2.7 <10 <10 83.624-Sep-1998 324161116599401 core 12.5 E3.4 NA E1.4 <10 <10 E3.324-Sep-1998 324161116599401 core 12.7 E3.0 NA E2.2 <10 <10 29.224-Sep-1998 324161116599401 core E10.1 E2.1 NA E1.5 <10 <10 <10

04-Nov-1998 324130117002501 surf 915 4,900 NA 38.7 82.2 <10 159

04-Nov-1998 324139117000801 surf 10.9 39.3 NA E2.8 12.1 <10 8604-Nov-1998 324131117000101 surf 19.9 54.6 NA E5.6 19.4 <10 15704-Nov-1998 324126116595701 surf 60.6 863 NA 10.4 33.8 <10 224

04-Nov-1998 324137116592401 surf 33.1 34.6 NA E4.4 18.1 <10 229

04-Nov-1998 324209116585001 surf E9.6 14.2 NA E2.4 E8.6 <10 24.6

04-Nov-1998 324147116593501 surf 17.7 19.4 NA E4.2 15.4 <10 146

04-Nov-1998 324703116473101 surf 14.6 14.5 NA E2.8 11.4 <10 69.2

ce inlet 04-Nov-1998 324737116453501 surf 16.4 61.0 NA E3.1 11.6 <10 29.2

05-Nov-1998 324223116585901 core 37.2 68.6 NA 4.4 12.3 <10 54.205-Nov-1998 324221116585801 core 12.8 E7.5 NA E2.7 11.2 <10 41.205-Nov-1998 324202116593401 core 25.0 11.7 NA E2.8 <10 <10 95.8

05-Nov-1998 324239116583401 core E9.2 67.8 NA E2.1 E6.6 <10 71.205-Nov-1998 324241116583501 core 42.1 14.1 NA E5.0 20.5 <10 129

05-Nov-1998 324142117001301 core 97.0 E316 NA 28.4 159 14.1 51.0

Date Site ID
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

1,6-Dimethylnaphthalene

C2-128 isomers

Acenaphthylene

1,2-Dimethylnaphthalene

Acenaphthene

C3-128 isomers

2,3,6-Trimethylnaphthalene

49404 49403 49429

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

E21.8 E312 <30 <30 <30 E29.2 <30

E4.1 E306 <20 <20 <20 21.9 <20E3.0 E167 E2.6 <10 <10 13.2 <10E6.2 E285 E5.3 <20 <20 30.0 <20

14.0 221 E3.2 E2.9 E2.3 16.9 E3.2

E9.4 156 E2.3 <10 <10 12.6 <10

<13.0 E131 E2.4 <10 <10 15.4 <10

E4.6 36.0 E2.9 <10 <10 18.4 <10E9.2 E180 <20 <20 <20 21.4 <20E8.2 E81.9 <10 <10 <10 12.8 <10E6.2 93.6 E2.5 E1.5 E1.8 E9.8 E2.0E7.2 99.2 <10 <10 <10 <10 <10E1.0 E6.0 <10 <10 <10 <10 <10E6.2 E65.1 <10 <10 <10 8.6 <10

<10 <10 <10 <10 <10 <10 <10

21.2 157 E9.4 <10 E3.3 67.4 <10

E7.5 105 E3.0 <10 <10 22.6 <10

20.9 256 E2.9 <10 <10 43.9 <1024.2 345 E4.7 <10 <10 59.0 <1024.0 251 E4.5 <10 <10 39.4 <10

E3.6 26.1 E2.6 <10 <10 <10 <10

13.3 163 E3.3 <10 <10 38.4 <1012.8 75.6 E3.5 <10 <10 14.5 E2.8

E4.9 36.3 E4.6 <10 <10 25.8 <10E6.1 62.9 E3.9 <10 <10 14.3 <10E5.0 60.6 E2.9 <10 <10 <10 <10

10.6 105 E4.5 <10 <10 29.1 <10

E6.0 81.2 E4.3 <10 E1.1 E7.7 <10

14.3 152 E8.3 <10 <10 39.9 <1066.6 E306 26.4 <15 26.7 88.8 24.9
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

9H-Fluorene

C4-128 isomers

1-Methyl-9H-fluorene

C1-166 isomers

Dibenzo-thiphene

Phenanthrene

Anthracene

49399 49398 49409 49434

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

E6.1 <30 E5.2 NA NA E10.2 <30E5.5 <20 <20 NA NA E8.6 <20E6.0 <10 E3.1 NA NA E9.7 E3.7

E15.0 <20 E5.6 NA NA E18.1 E5.4

16.7 <10 E6.7 NA NA 16.0 E4.8

E7.9 11.3 E4.8 NA NA E6.0 E4.1E5.0 <10 <10 NA NA E6.3 E3.3E3.7 <10 E1.8 NA NA E5.0 E2.6

E13.5 <20 E6.4 NA NA E14.4 E6.5

E3.2 <10 E3.8 NA NA E4.0 E3.1E5.5 <10 E3.6 NA NA E1.5 E4.8E5.6 <10 E4.6 NA NA E6.2 E4.1E1.2 <10 E2.0 NA NA E3.1 E2.4E1.8 <10 E1.8 NA NA E5.3 E2.2

<10 <10 E1.1 NA NA E1.8 <10

10.5 53.0 E7.3 NA NA 14.7 E5.1

E4.5 27.8 E2.8 NA NA E5.9 E2.4E8.8 49.7 E3.7 NA NA 11.4 E2.6

E21.9 58.6 E8.5 NA NA 17.2 E4.4

E5.8 E6.8 E2.8 NA NA E8.1 E3.8E1.5 <10 E2.0 NA NA E1.8 E1.6E7.0 <10 E4.7 NA NA E8.8 E3.7E2.2 <10 E6.9 NA NA E7.0 E3.5E2.8 <10 E2.8 NA NA 14.5 4.5E2.5 <10 E2.4 NA NA E9.7 E4.3E2.2 <10 E2.4 NA NA E5.3 E3.2

 <10 <10 E4.5 NA NA E3.3 E4.5

E2.4 <10 <10 NA NA 10.4 E5.5E4.6 <10 E3.8 NA NA 25.6 E9.3

<22.0 141 E7.4 NA NA 269 61.8
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

Acridine

Phenanthridine

9H-Carbazol

C5-128 isomers

C2-166 isomers

2-Methyl-Anthracene

4,5-Methylenephenanthrene

49435 49411

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

NA NA NA <30 NA <30 E6.3

 NA NA NA <20 NA <20 E4.9 NA NA NA <10 NA <10 E4.3 NA NA NA <20 NA <20 E7.4 NA NA NA <10 NA <10 E6.7 NA NA NA <10 NA <10 E3.7 NA NA NA <10 NA <10 E3.9 NA NA NA <10 NA <10 E3.6 NA NA NA <20 NA <20 E8.0 NA NA NA <10 NA <10 E3.7 NA NA NA <10 NA E3 E6.5 NA NA NA <10 NA E3 E6.6 NA NA NA <10 NA <10 <10 NA NA NA <10 NA <10 <10 NA NA NA <10 NA <10 E1.8 NA NA NA <10 NA <10 <10 NA NA NA <10 NA <10 E4.2 NA NA NA <10 NA <10 E4.5 NA NA NA <10 NA <10 E6.4 NA NA NA 24.1 NA <10 E3.9 NA NA NA <10 NA <10 <10 NA NA NA <10 NA <10 E4.4 NA NA NA <10 NA <10 E3.3 NA NA NA <10 NA <10 E3.4 NA NA NA <10 NA <10 E3.5 NA NA NA <10 NA <10 4.2 NA NA NA <10 NA <10 E5.0 NA NA NA <10 NA <10 E4.2 NA NA NA <10 NA <10 E8.7 NA NA NA 62.0 NA 30 47.3
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

C1-178 isomers

1-Methyl-Phenanthrene

C3-166 isomers

C2-178 isomers

Fluoranthene

Pyrene

C3-178 isomers

49410 49466 49387

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

<30 <30 NA <30 E15.7 E17.3 <30<20 <20 NA <20 E13.6 E13.4 <20<10 <10 NA <10 15.8 13.3 <10<20 <20 NA <20 20.9 E17.4 <20

17.1 E5.4 NA 10.0 21.0 15.5 E4.910.0 E2.6 NA E5.9 15.4 13.6 <10

<10 <10 NA <10 12.1 10.0 <10

E5.6 <10 NA <10 E9.0 E8.8 <10

<20 <20 NA <20 28.4 22.8 <20<10 <10 NA <10 11.0 E9.0 <10

11.5 E2.6 NA E8.7 23.1 18.0 <10

E9.2 <10 NA <10 16.7 15.2 <10

<10 <10 NA <10 E7.1 11.4 <10<10 <10 NA <10 E9.0 E8.0 <10<10 <10 NA <10 E3.7 E3.9 <10

10.5 <10 NA <10 12.3 E9.9 <10

 <10 <10 NA <10 10.9 11.2 <10

10.1 <10 NA <10 15.5 15.7 <10

E6.3 E5.4 NA E5.1 18.8 17.7 <10

INTERFERENCE <10 NA <10 14.3 14.6 <10

<10 <10 NA <10 E3.8 E3.2 <10

E9.0 E3.9 NA <10 15.5 16.0 <10

10.6 <10 NA E9.6 15.0 14.8 <1014.5 E3.4 NA 17.1 35.8 33.1 E6.811.9 E3.7 NA 38.5 27.2 32.0 15.6

E3.9 E4.2 NA 13.4 18.5 22.5 13.0

 <10 E5.60 NA <80 11.9 12.8 <10

10.1 E3.90 NA 16.2 30.0 29.3 E5.5

E23.0 E6.0 NA 16.3 75.4 78.6 E9.8

485 88.5 NA 504 407 371 367
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

C4-178 isomers

1-Methyl-Pyrene

C1-202 isomers

C2-202 isomers

C5-178 isomers

Benz (a) anthracene

Chrysene

49388 49436 49450

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

<30 <30 <30 <30 <30 E11.8 E16.1<20 E6.9 <20 <20 <20 E8.5 E12.5<10 <10 E7.6 <10 <10 E7.8 13.3<20 <20 E11.8 E14.0 <20 E8.5 E12.6<10 E4.0 13.9 E8.5 <10 E5.3 E9.4<10 E3.4 E9.8 <10 <10 E5.7 E8.4<10 <10 E5.6 <10 <10 E5.8 11.2<10 <10 E6.4 E3.5 <10 E2.7 E5.4<20 <20 E12.4 <20 <20 E8.8 E15.4<10 <10 E6.4 <10 <10 E5.0 E7.7<10 E3.0 13.4 <10 <10 E2.1 E8.9<10 <10 12.4 <10 <10 E5.4 E8.2<10 <10 E5.7 <10 <10 E4.0 E6.8<10 <10 <10 <10 <10 E3.3 E5.2<10 <10 <10 <10 <10 E2.0 E3.5

 <10 <10 <10 <10 <10 E3.9 E6.5 <10 <10 E6.3 <10 <10 E3.1 E7.6

<10 E2.6 10.6 <10 <10 E5.0 10.6<10 E3.4 12.5 <10 <10 E6.2 11.3

 <10 E2.1 E8.8 13.0 <10 E6.6 10.4 <10 <10 <10 <10 <10 E1.0 E2.1

<10 E2.8 10.5 16.2 <10 E7.3 12.9<10 E2.7 13.7 16.7 <10 E5.9 15.6

 <10 E2.8 20.9 27.9 <10 11.3 26.4 <10 E3.7 25.3 22.4 20.7 10.2 23.2 <10 E4.3 21.3 18.5 <10 E9.7 16.6 <10 <10 <10 <10 <10 E4.6 10.3 <10 E3.1 20.7 22.7 <10 11.4 22.3 <10 E5.7 44.0 71.6 <10 25.8 54.3

<200 43.8 E 536 <800 123 315
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

C3-202 isomers

C1-228 isomers

C4-202 isomers

C5-202 isomers

C2-228 isomers

Benzo (b) fluoranthene

Benzo (k) fluoranthene

49458 49397

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

<30 <30 <30 <30 <30 E18.8 E12.6<20 <20 <20 <20 <20 E11.6 E9.8<10 <10 <10 <10 <10 E11.7 E9.1<20 <20 <20 <20 <20 E16.3 E9.5<10 E5.0 <10 <10 <10 E9.9 E8.0<10 E7.6 <10 <10 <10 E8.2 E8.1<10 <10 <10 <10 <10 E11.8 E7.8<10 <10 <10 <10 <10 E4.5 E4.2<20 E9.5 <20 <20 <20 E13.4 E12.3<10 <10 <10 <10 <10 E7.5 E6.2<10 E5.3 <10 <10 <10 E6.8 E9.0<10 E7.2 <10 <10 E6.1 E8.6 E6.9<10 <10 <10 <10 <10 E7.2 E4.4<10 <10 <10 <10 <10 E6.9 E5.2<10 <10 <10 <10 <10 E3.9 E2.7<10 <10 <10 <10 <10 E4.7 E5.3<10 <10 <10 <10 <10 E5.6 E4.7

 <10 E4.3 <10 <10 <10 E8.5 E6.4

<10 <10 <10 <10 <10 11.5 E7.1

 <10 E3.9 <10 <10 <10 E8.2 E7.4

<10 <10 <10 <10 <10 E1.3 E1.8<10 <10 <10 <10 <10 12.0 10.1

 <10 E6.1 <10 <10 E5.2 13.6 10.2 <10 19.8 <10 <10 E9.4 25.4 17.6 <10 17.4 <10 <10 17.8 32.2 18.6 <10 12.1 <10 <10 <10 19.4 14.8

<10 <10 <10 <10 <10 11.2 E8.9

 <10 11.8 <10 <10 <10 19.8 18.6 <10 30.8 <10 <10 28.2 62.0 56.2

220 399 191 217 415 137 119
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

Benzo (e) pyrene

Benzo (a) pyrene

Perylene

C1-252 isomers

C3-228 isomers

C2-252 isomers

C4-228 isomers

49389

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

E13.9 E17.5 462 <30 <30 <30 <30E11.8 E13.6 379 <20 <20 <20 <20

E9.6 E9.3 308 <10 <10 <10 <10

E11.4 E11.9 464 <20 <20 <20 <20

E7.0 E6.5 469 <10 <10 <10 <10E7.0 E7.2 468 <10 <10 <10 <10E8.6 E7.6 417 <10 <10 <10 <10E5.7 <10 233 <10 <10 <10 <10

E11.8 E10.0 656 <20 <20 <20 <20

E6.5 E5.3 415 <10 <10 <10 <10E6.4 E6.0 464 E7.5 <10 <10 <10E6.2 E5.8 531 E8.5 <10 <10 <10E6.0 E4.6 328 <10 <10 <10 <10E5.1 E4.6 348 <10 <10 <10 <10E3.0 E2.5 122 <10 <10 <10 <10E6.9 E7.3 10.1 <10 <10 <10 <10E7.3 E3.6 146.0 <10 <10 <10 <10

12.5 E2.6 376.0 <10 <10 <10 <1013.0 E7.2 343 <10 <10 <10 <10

E9.9 E8.7 298.0 <10 <10 <10 <10

 <10 <10 E7.1 <10 <10 <10 <10

15.5 12.9 326 <10 <10 <10 <1015.4 17.2 23.2 <10 <10 <10 <1023.0 18.2 21.1 14.8 <10 <10 <1032.5 16.7 E7.8 E7.6 <10 <10 <1025.3 15.0 E7.2 <10 <10 <10 <1014.8 E8.7 <10 <10 <10 <10 <1023.5 17.1 10.9 E8.3 <10 <10 <1074.1 46.9 21.1 48.5 <10 <10 <10

195 74.9 100 416 <300 296 73.7
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

Benzo (g,h,i) perylene

Indeno (1,2,3-c,d) 

pyrene 

Dibenzo (a,h) 

anthracene

C3-252 isomers

C4-252 isomers

C5-228 isomers

C5-252 isomers

49408 49390 49461

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

E18.9 E14.0 <30 <30 <30 <30 <30E14.6 E7.9 E4.5 <20 <20 <20 <20

E7.8 E6.4 <10 <10 <10 <10 <10

E10.9 E8.1 <20 <20 <20 <20 <20

E6.8 E7.6 <10 <10 <10 <10 <10E7.2 E7.8 <10 <10 <10 <10 <10E7.7 E5.4 <10 <10 <10 <10 <10E4.3 E2.5 <10 <10 <10 <10 <10

E13.2 E8.7 <20 <20 <20 <20 <20

E5.1 E3.8 <10 <10 <10 <10 <10E7.1 E7.4 E3.6 <10 <10 <10 <10E5.9 E7.0 <10 <10 <10 <10 <10

12.7 E4.5 <10 <10 <10 <10 <10

E8.2 E5.9 <10 <10 <10 <10 <10E4.8 E2.5 <10 <10 <10 <10 <10

 <10 <10 <10 <10 <10 <10 <10

E5.5 E3.2 <10 <10 <10 <10 <10E8.4 E3.7 <10 <10 <10 <10 <10E8.8 E7.2 <10 <10 <10 <10 <10

NA E.07 E2.3 <10 <10 <10 <10

E1.4 E1.3 <10 <10 <10 <10 <10

11.3 E9.1 <10 <10 <10 <10 <10

E7.4 E6.9 <10 <10 <10 <10 <10

14.0 11.7 E2.7 <10 <10 <10 <1023.4 17.1 E3.4 <10 <10 <10 <1018.2 11.8 E3.1 <10 <10 <10 <1016.0 10.2 <10 <10 <10 <10 <1018.0 18.1 E3.6 <10 <10 <10 <1053.5 42.4 E9.0 <10 <10 <10 <10

248 87.5 30.4 138 <10 59.7 <10
PAHs from SWR, San Diego County, Calif., core segments, surficial bed sediment, and URDS samples—Continued

PCODE

Type

24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core24-Sep-1998 324161116599401 core

04-Nov-1998 324130117002501 surf

04-Nov-1998 324139117000801 surf04-Nov-1998 324131117000101 surf04-Nov-1998 324126116595701 surf

04-Nov-1998 324137116592401 surf

04-Nov-1998 324209116585001 surf

04-Nov-1998 324147116593501 surf

04-Nov-1998 324703116473101 surf

ce inlet 04-Nov-1998 324737116453501 surf

05-Nov-1998 324223116585901 core05-Nov-1998 324221116585801 core05-Nov-1998 324202116593401 core

05-Nov-1998 324239116583401 core05-Nov-1998 324241116583501 core

05-Nov-1998 324142117001301 core

Date Site ID

Coronene

Nitrobenzene-d 5 

(surrogate)

2-Fluorobiphenyl 

(surrogate)

Terphenyl-d 14 

(surrogate)

(μg/kg) (%) (%) (%)

<30 NA NA NA

E4.6 NA NA NAE2.4 NA NA NA

<20 NA NA NA<10 NA NA NA<10 NA NA NA<10 NA NA NA<10 NA NA NA<20 NA NA NA<10 NA NA NA<10 NA NA NA<10 NA NA NA

E3.9 NA NA NAE2.6 NA NA NAE1.5 NA NA NA

 <10 E171.3 78.1 44.0 <10 95.6 80.0 106.4 <10 107.1 73.7 107.0

E4.7 115.2 84.4 125.8E2.2 112.9 74.0 71.6

 <10 73.7 83.8 124.3

E4.70 127.1 77.6 92.5

 <10 119.3 81.9 97.4

E4.10 119.1 86.0 105.8E10.8 128.4 73.0 99.6

7.1 92.2 87.7 117.8

 <10 93.6 71.6 100.9

E4.10 63.0 58.2 61.9E21.7 133.1 90.8 104.2E70.0 78.8 85.8 111.5
107 Table 8

Site Name Date Site ID Type Lindane (μg/kg) Heptachlor (μg/kg) Aldrin (μg/kg) Heptachlor epoxide (μg/kg) Chlor- dane (μg/kg) Endosulfan I (μg/kg) Dieldrin (μg/kg) 

SWR Core - Depth 000 - 004 cm 24-Sept-1998 324161116599401 core <2.50 <2.50 <2.50 <2.50 <15.00 <2.50 <2.50 SWR Core - Depth 008 - 012 cm 24-Sept-1998 324161116599401 core <2.00 <2.00 <2.00 <2.00 <10.00 <2.00 <2.00 SWR Core - Depth 016 - 020 cm 24-Sept-1998 324161116599401 core <1.00 <1.00 <1.00 <1.00 5.70 <1.00 <1.00 SWR Core - Depth 024 - 028 cm 24-Sept-1998 324161116599401 core <1.50 <1.50 <1.50 <1.50 <10.00 <1.50 <1.50 SWR Core - Depth 032 - 036 cm 24-Sept-1998 324161116599401 core <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR Core - Depth 044 - 048 cm 24-Sept-1998 324161116599401 core <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR Core - Depth 056 - 060 cm 24-Sept-1998 324161116599401 core <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 SWR Core - Depth 068 - 072 cm 24-Sept-1998 324161116599401 core <0.50 <0.50 <0.50 <0.50 8.40 <0.50 <0.50 SWR Core - Depth 084 - 088 cm 24-Sept-1998 324161116599401 core <1.50 <1.50 <1.50 <1.50 <10.00 <1.50 <1.50 SWR Core - Depth 100 - 104 cm 24-Sept-1998 324161116599401 core <0.50 <0.50 <0.50 <0.50 <5.00 <0.50 <0.50 SWR Core - Depth 116 - 120 cm 24-Sept-1998 324161116599401 core <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR Core - Depth 132 - 136 cm 24-Sept-1998 324161116599401 core <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR Core - Depth 148 - 152 cm 24-Sept-1998 324161116599401 core <0.50 <0.50 <0.50 <0.50 <5.00 <0.50 <0.50 SWR Core - Depth 164 - 168 cm 24-Sept-1998 324161116599401 core <0.50 <0.50 <0.50 <0.50 <5.00 <0.50 <0.50 SWR Core - Depth 180 - 184 cm 24-Sept-1998 324161116599401 core <0.50 <0.50 <0.50 <0.50 <5.00 <0.50 <0.50 SWR near Pump Tower 09-Sept-1998 324131117002502 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR near Vista del Lago 09-Sept-1998 324139117000802 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR center of minimum pool 09-Sept-1998 324131117000102 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR near recreation area 09-Sept-1998 324126116595702 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 SWR minimum pool boundary East 09-Sept-1998 324137116592402 surf <1.00 <1.00 <1.00 <1.00 9.40 <1.00 <1.00 SWR east end res. fill boundary 09-Sept-1998 324209116585002 surf <0.50 <0.50 <0.50 <0.50 <5.00 <0.50 <0.50 SWR near Gum Tree Cove 09-Sept-1998 324147116593502 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 Loveland Reservoir near dam 09-Sept-1998 324703116473102 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 Loveland Reservoir east end near 

source inlet

09-Sept-1998 324737116453502 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 

URDS Vista del Lago_01 05-Nov-1998 324142117001301 surf <1.50 <1.00 <1.00 <1.60 92.00 <2.40 <1.00 URDS Alcena Court Pond_01 05-Nov-1998 324223116585901 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 URDS Alcena Court Pond_02 05-Nov-1998 324221116585801 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 URDS Gumtree Cove Pond_01 05-Nov-1998 324202116593401 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 URDS Hansen's Creek Pond_01 05-Nov-1998 324239116583401 surf <1.00 <1.00 <1.00 <1.00 10.70 <1.00 <1.00 URDS Hansen's Creek Pond_02 05-Nov-1998 324241116583501 surf <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 Table 8. Analytical results for organochlorine insecticides concentrations in selected core segments and reservoir and urban runoff diversion system (URDS) Sweetwater and Loveland Reservoirs, San Diego County, California [An “E” indicates that the value has been estimated because of interference or is below method reporting limits. SWR, Sweetwater Reservoir; surf, surficial sampnot detected at a concentration above the reporting level; %, percentage recovery. μg/kg, microgram per kilogram; cm, centimeter]
108 Table 8

Site Name Date Site ID Type p,p′-DDT (μg/kg)

p,p′-

Methoxychlor

(μg/kg)

Mirex

(μg/kg)

Toxaphene

(μg/kg)

Arochlor 

1254

(μg/kg)

Arochlor 

1260

(μg/kg)

Total

PCB

(μg/kg)

(

SWR Core - Depth 000 - 004 cm 24-Septt-1998 324161116599401 Core <2.50 <10.00 <2.50 <250 <15.00 <15.00 <45.00 SWR Core - Depth 008 - 012 cm 24-Septt-1998 324161116599401 Core <2.00 <8.00 <2.00 <200 <10.00 <10.00 <30.00 SWR Core - Depth 016 - 020 cm 24-Sept-1998 324161116599401 Core <1.00 <4.00 <1.00 <100 <5.00 <5.00 <15.00 SWR Core - Depth 024 - 028 cm 24-Sept-1998 324161116599401 Core <1.50 <6.00 <1.50 <150 <10.00 <10.00 <30.00 SWR Core - Depth 032 - 036 cm 24-Sept-1998 324161116599401 Core <1.25 <5.00 <1.25 <125 <12.50 <12.50 <37.50 SWR Core - Depth 044 - 048 cm 24-Sept-1998 324161116599401 Core <1.25 <5.00 <1.25 <125 <12.50 <12.50 <37.50 SWR Core - Depth 056 - 060 cm 24-Sept-1998 324161116599401 Core <1.00 <4.00 <1.00 <100 <5.00 <5.00 <15.00 SWR Core - Depth 068 - 072 cm 24-Sept-1998 324161116599401 Core E0.54 <2.00 <0.50 <50 <5.00 <5.00 <15.00 SWR Core - Depth 084 - 088 cm 24-Sept-1998 324161116599401 Core <1.50 <6.00 <1.50 <150 <10.00 <10.00 <30.00 SWR Core - Depth 100 - 104 cm 24-Sept-1998 324161116599401 Core <0.50 <2.00 <0.50 <50 <5.00 <5.00 <15.00 SWR Core - Depth 116 - 120 cm 24-Sept-1998 324161116599401 Core <1.25 <5.00 <1.25 <125 <12.50 <12.50 <37.50 SWR Core - Depth 132 - 136 cm 24-Sept-1998 324161116599401 Core <1.25 <5.00 <1.25 <125 <12.50 <12.50 <37.50 SWR Core - Depth 148 - 152 cm 24-Sept-1998 324161116599401 Core <0.50 <2.00 <0.50 <50 <5.00 <5.00 <15.00 SWR Core - Depth 164 - 168 cm 24-Sept-1998 324161116599401 Core <0.50 <2.00 <0.50 <50 <5.00 <5.00 <15.00 SWR Core - Depth 180 - 184 cm 24-Sept-1998 324161116599401 Core <0.50 <2.00 <0.50 <50 <5.00 <5.00 <15.00 SWR near Pump Tower 09-Sept-1998 324131117002502 surf <1.25 <5.00 <1.25 <125 <12.50 27.40 NA SWR near Vista del Lago 09-Sept-1998 324139117000802 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA SWR center of minimum pool 09-Sept-1998 324131117000102 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA SWR near recreation area 09-Sept-1998 324126116595702 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA SWR minimum pool boundary East 09-Sept-1998 324137116592402 surf <1.00 <4.00 <1.00 <100 <5.00 <5.00 NA SWR east end res. fill boundary 09-Sept-1998 324209116585002 surf <0.50 <2.00 <0.50 <50 <5.00 <5.00 NA SWR near Gum Tree Cove 09-Sept-1998 324147116593502 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA Loveland Reservoir near dam 09-Sept-1998 324703116473102 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA Loveland Reservoir east end near 

source inlet

09-Sept-1998 324737116453502 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA 

URDS Vista del Lago_01 05-Nov-1998 324142117001301 surf <10.00 <7.00 <1.00 <100 8.30 14.00 NA URDS Alcena Court Pond_01 05-Nov-1998 324223116585901 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA URDS Alcena Court Pond_02 05-Nov-1998 324221116585801 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA URDS Gumtree Cove Pond_01 05-Nov-1998 324202116593401 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA URDS Hansen's Creek Pond_01 05-Nov-1998 324239116583401 surf <1.00 <4.00 <1.00 <100 <5.00 <5.00 NA URDS Hansen's Creek Pond_02 05-Nov-1998 324241116583501 surf <1.25 <5.00 <1.25 <125 <12.50 <12.50 NA 

Table 8. Analytical results for organochlorine insecticides concentrations in selected core segments and reservoir and urban runoff diversion system (URDS) pondSweetwater and Loveland Reservoirs, San Diego County, California—Continued
109 Table 9

Site name

Major metals 

Silicon

(%)

Calcium 

(%)

Magnesium 

(%)

Potassium 

(%)

Sodium

(%)

Phosphorus

(%)

Total 

carbon 

(%)

Organic 

carbon

(%)

Aluminum

(%)

SWR Core - Depth 000 - 004 cm 19.28 1.81 1.13 0.30 0.50 0.088 3.26 3.05 5.81 SWR Core - Depth 008 - 012 cm 22.02 1.59 1.05 0.28 0.49 0.096 3.06 2.83 6.38 SWR Core - Depth 016 - 020 cm 22.23 1.59 1.03 0.30 0.49 0.088 2.92 2.78 7.56 SWR Core - Depth 024 - 028 cm 19.47 2.73 1.15 0.37 0.54 0.093 3.46 3.04 7.11 SWR Core - Depth 024 - 028 cm 21.79 2.59 1.23 0.41 0.54 0.097 3.41 3.05 7.36 SWR Core - Depth 032 - 036 cm 20.40 2.39 1.30 0.46 0.53 0.093 3.40 3.02 8.59 SWR Core - Depth 040 - 044 cm 21.23 1.96 1.18 0.40 0.46 0.090 3.05 2.75 8.94 SWR Core - Depth 048 - 052 cm 13.61 1.51 1.00 0.28 0.49 0.110 2.76 2.56 7.99 SWR Core - Depth 056 - 060 cm 22.35 1.68 0.98 0.36 0.50 0.110 2.80 2.59 8.10 SWR Core - Depth 064 - 068 cm 22.30 1.45 0.95 0.57 0.49 0.120 2.60 2.45 10.78 SWR Core - Depth 072 - 076 cm 22.25 2.36 1.23 0.54 0.55 0.093 3.51 3.22 9.13 SWR Core - Depth 080 - 084 cm 22.34 2.79 1.03 0.39 0.54 0.089 3.73 3.17 6.59 SWR Core - Depth 088 - 092 cm 22.10 2.46 0.98 0.37 0.50 0.083 8.52 2.99 7.04 SWR Core - Depth 096 - 100 cm 22.92 2.05 0.90 0.34 0.51 0.095 4.70 2.95 6.09 SWR Core - Depth 104 - 108 cm 19.60 1.93 0.90 0.38 0.54 0.100 3.11 2.84 7.30 SWR Core - Depth 104 - 108 cm 20.44 1.99 0.91 0.42 0.58 0.100 3.10 2.90 7.21 SWR Core - Depth 112 - 116 cm 20.94 1.96 0.85 0.31 0.53 0.084 3.19 2.85 5.66 SWR Core - Depth 120 - 124 cm 19.63 1.81 0.75 0.24 0.56 0.081 3.22 2.96 4.53 SWR Core - Depth 128 - 132 cm 20.35 1.37 0.75 0.34 0.55 0.085 3.54 3.51 4.80 SWR Core - Depth 136 - 140 cm 22.54 1.34 0.60 0.93 0.46 0.083 2.96 2.96 7.50 SWR Core - Depth 144 - 148 cm 22.76 1.38 0.70 0.30 0.56 0.094 2.74 2.74 7.60 SWR Core - Depth 152 - 156 cm 25.65 1.73 0.98 1.32 0.83 0.066 2.70 2.69 9.29 SWR Core - Depth 160 - 164 cm 20.47 1.91 1.10 0.74 1.29 0.059 2.35 2.28 5.48 SWR Core - Depth 168 - 172 cm 23.48 1.48 0.78 0.29 0.56 0.089 2.64 2.70 7.15 SWR Core - Depth 176 - 180 cm 21.68 1.50 0.58 0.31 0.39 0.092 2.70 2.08 5.93 SWR Core - Depth 184 - 188 cm 24.96 1.76 1.15 0.90 1.03 0.066 2.46 3.36 7.23 

Table 9. Analytical results for major and trace element concentrations in bed sediment core, Sweetwater Reservoir, San Diego County, California [The site identification number is 324161116599401. Bed sediment core sampling was done on September 24, 1998. SWR, Sweetwater Reservoir; NArecovery; ng/g, nanogram per gram; cm, centimeter]
110 Table 9

Site name

Trace metals

Arsenic

(ng/g)

Barium

(ng/g)

Cadmium

(ng/g)

Chromium

(ng/g)

Cobalt

(ng/g) Copper (ng/g) Lead (ng/g) Lithium (ng/g) Manganese (ng/g) Merc ury (ng/g) Nickel (ng/g) Scandium (ng/g) 

SWR Core - Depth 000 - 004 cm 18.7 235 0.13 42 25.8 87 25 49.5 1,750 0.066 21.8 10.1 SWR Core - Depth 008 - 012 cm 15.0 202 0.13 42 25.6 90 27 53.4 1,730 0.052 24.3 9.5 SWR Core - Depth 016 - 020 cm 15.0 200 0.13 46 24.7 103 22 53.9 1,590 0.056 22.1 10.5 SWR Core - Depth 024 - 028 cm 24.8 284 0.18 53 25.0 128 29 61.3 1,570 0.057 23.5 11.1 SWR Core - Depth 024 - 028 cm 25.6 274 0.21 48 24.9 130 23 63.1 1,480 0.059 26.2 12.2 SWR Core - Depth 032 - 036 cm 26.1 256 0.19 51 25.8 151 28 66.9 1,510 0.055 22.3 11.0 SWR Core - Depth 040 - 044 cm 25.6 186 0.17 53 26.6 143 22 54.4 1,600 0.064 22.0 12.0 SWR Core - Depth 048 - 052 cm 18.7 163 0.16 52 30.8 112 18 51.8 1,710 0.054 23.1 11.0 SWR Core - Depth 056 - 060 cm 18.5 153 0.19 51 29.4 109 28 55.6 1,670 0.058 25.2 11.4 SWR Core - Depth 064 - 068 cm 21.6 277 0.22 56 28.7 101 19 61.8 1,530 0.062 24.9 10.5 SWR Core - Depth 072 - 076 cm 22.0 286 0.24 57 26.2 183 34 65.1 1,440 0.057 25.9 11.5 SWR Core - Depth 080 - 084 cm 17.6 272 0.20 53 28.0 222 27 73.4 1,330 0.055 21.7 11.1 SWR Core - Depth 088 - 092 cm 20.9 263 0.20 56 23.7 184 34 63.0 1,150 0.050 26.0 10.3 SWR Core - Depth 096 - 100 cm 13.4 205 0.22 53 29.2 221 23 68.9 1,180 0.049 21.7 10.8 SWR Core - Depth 104 - 108 cm 14.1 223 0.22 51 31.0 205 26 78.6 1,190 0.046 28.6 10.8 SWR Core - Depth 104 - 108 cm 15.2 230 0.20 57 30.4 200 29 85.6 1,300 0.045 29.3 9.9 SWR Core - Depth 112 - 116 cm 18.8 216 0.24 57 30.8 233 22 77.8 1,220 0.050 28.9 9.3 SWR Core - Depth 120 - 124 cm 19.8 200 0.26 51 28.1 324 18 74.9 1,250 0.055 26.3 8.4 SWR Core - Depth 128 - 132 cm 22.6 251 0.34 51 28.6 513 29 78.3 1,260 0.061 26.1 7.5 SWR Core - Depth 136 - 140 cm 25.4 207 0.27 64 33.2 304 29 86.3 1,160 0.035 28.8 10.7 SWR Core - Depth 144 - 148 cm 15.1 272 0.19 60 31.0 97 20 67.6 900 0.044 33.9 9.1 SWR Core - Depth 152 - 156 cm 16.7 241 0.10 71 34.6 53 28 44.8 839 0.027 24.1 9.0 SWR Core - Depth 160 - 164 cm 11.9 240 0.080 58 33.6 48 21 37.9 1,120 0.028 22.1 7.4 SWR Core - Depth 168 - 172 cm 12.3 226 0.12 58 30.0 99 28 59.6 951 0.040 24.9 10.2 SWR Core - Depth 176 - 180 cm 15.5 302 0.070 60 32.2 95 34 66.1 849 0.040 33.2 8.9 SWR Core - Depth 184 - 188 cm 11.5 363 0.060 63 34.4 54 30 48.9 878 0.030 24.0 7.9 

Table 9. Results for major and trace metals from the Sweetwater bed sediment core, California—Continued
111 Table 10

Table 10. Results of cesium 137 age determinations and estimated dates for bed sediment core segments, Sweetwater Reservoir,

San Diego County, Calfiornia

[The site identification number is 324161116599401. Bed sediment core sections were sampled on September 24, 1998. SWR, 

Sweetwater Reservoir. cm, centimeter; pCi/g, pico curie per gram]

Site name Cesium 137 

(pCi/g)

Estimated 

date

SWR core - depth 008–016 cm 0.107 1997

SWR core - depth 028–036 cm 0.216 1990

SWR core - depth 044–052 cm 0.259 1987

SWR core - depth 060–068 cm 0.307 1981

SWR core - depth 076–084 cm 0.252 1978

SWR core - depth 088–092 cm 0.130 1971

SWR core - depth 096–100 cm 0.273 1968

SWR core - depth 104–108 cm 0.264 1966

SWR core - depth 112–116 cm 0.521 1962

SWR core - depth 120–124 cm 0.276 1959

SWR core - depth 128–132 cm 0.290 1957

SWR core - depth 136–140 cm 0.0895 1953

SWR core - depth 152–156 cm –0.0256 1945

SWR core - depth 168–172 cm 0.0548 1935
112 Table 11

Depth Interval 

(cm) Color Description

0–5 Olive black (5Y 2/1) with olive gray (5Y 4/1) streaks Soft, fine grained, fluid 

5–10 Mostly olive black Silty (no sand but not very sticky)

10–15 Olive gray with streaks of olive black Trending to all olive gray 

15–26 Olive gray Gas pockets (1–4 mm); soft; no sand

26–40 Olive black (oxidizes to olive gray) Same texture as above

40–58 Slightly lighter but still olive black Same texture as above; few gas pockets

58–60 Distinctive tan layer— olive gray (5Y 3/2) Same soft texture

60–72 A little darker (5Y 4/1 to 5Y 2/1) Same soft texture

72–75 Mottled olive gray and black Firmer texture; no sand

75–127 Uniform olive black Smaller gas pockets (1 mm), firmer and drier; no sand 

but maybe more clay

127–140 Mottled olive gray with few streaks of olive black Firmer texture

140–144 Mottled/streaky olive black and gray No data

144–148 Mostly olive gray with olive black streaks at 148cm No data

148–158 Very uniform olive gray Almost no gas pockets; smooth and stiffer

158–173 Distinctive uniform olive gray Drier; no gas pockets; siltier; lots of small sparkles

173–180 A few dark streaks Sudden change to no sparkles; smoother; more 

clayey; few small gas pockets

180–183 Olive black layer with olive gray streaks Same texture as above

183–202 Olive gray with a few olive black streaks Smooth with a few small gas pockets; no sand

202–216 Trending to same stuff as 158–173 cm layer Drier and firmer with almost no gas pockets; silty 

with lots of sparkles

Table 11. Visual descriptive comments of core contents, color, and texture for the Sweetwater Reservoir sampling sites, San Diego

County, California 

[General description: 216 cm (centimeter) long/dark with gas pockets and some layering to almost 130 cm; more tan with smaller

gas pockets from about 130–216 cm with small, sparkly dots. No organic detritus or visible biota in entire core. mm, millimeter]
Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and Loveland Reservo

[Time is denoted in 24-hour scale. An “E” indicates that the value has been estimated because of interference or is below method reporting limits. The is its parameter code (PCODE). ID, identification; SWR, Sweetwater Reservoir; QC, quality control; QA, quality assurance; CA, California; NA, not recovery; <, compound was not detected at a concentration above the reporting level; μg/L, microgram per liter] 113 Table 12

Acetate vinyul

Acrolein total

1,1,1-Trichloroethane

1,1,2-Trichloroethane

PCODE 77057 34210 34506 34511 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank NA NA <0.03 <0.06 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate NA NA <0.03 <0.06 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank NA NA <0.03 <0.06 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike NA NA 0.56 0.74 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate NA NA <0.03 <0.06 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank NA NA <0.03 <0.06 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike NA NA 0.24 0.41 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate NA NA <0.03 <0.06 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank NA NA <0.03 <0.06 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank NA NA <0.03 <0.06 

1,2,3-Trichloropropane

1,2-Dibromoethane

1,2-Dichloroethane

1,2-Dichloropropane

PCODE 77443 77651 32103 3454

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.2 <0.04 <0.1 <0.07 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.2 <0.04 <0.1 <0.07 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.2 <0.04 <0.1 <0.07 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 2.1 0.56 1.5 0.87 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.2 <0.04 <0.1 <0.07 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.2 <0.04 <0.1 <0.07 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 1.2 0.32 0.8 0.39 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.2 <0.04 <0.1 <0.07 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.2 <0.04 <0.1 <0.07 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.2 <0.04 <0.1 <0.07 
114 Table 12

Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and LovelaCalifornia—Continued

2-Hexanone

Acetone

Acrylonitrile

1,2,3-Trichlorobenzene

PCODE 77103 81552 34215 77613 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.7 <5 <1 <0.3 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.7 <5 <1 <0.3 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.7 <5 <1 <0.3 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 8.9 78 15 2.8 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.7 <5 <1 <0.3 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.7 <5 <1 <0.3 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 4.8 43 9 1.4 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.7 <5 <1 <0.3 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.7 <5 <1 <0.3 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.7 <5 <1 <0.3 

1,3,5-Trimethylbenzene

1,3-Dichlorobenzene

1,4-Dichlorobenzene

Isopropylbenzene

PCODE 77226 34566 34571 77223 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.04 <0.05 <0.05 <0.03 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.04 <0.05 <0.05 <0.03 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.04 <0.05 <0.05 <0.03 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.55 0.51 0.5 0.56 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.04 <0.05 <0.05 <0.03 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.04 <0.05 <0.05 <0.03 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.24 0.25 0.26 0.24 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.04 <0.05 <0.05 <0.03 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.04 <0.05 <0.05 <0.03 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.04 <0.05 <0.05 <0.03 
115 Table 12

Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and LovelaCalifornia—Continued

sec-Butylbenzene

tert-Butylbenzene

Benzene

Bromobenzene

PCODE 77350 77353 34030 81555 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.05 <0.1 <0.1 <0.04 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.05 <0.1 E0.01 <0.04 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.05 <0.1 <0.1 <0.04 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.52 1.08 0.58 0.52 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.05 <0.1 <0.1 <0.04 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.05 <0.1 <0.1 <0.04 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.24 0.49 0.26 0.26 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.05 <0.1 <0.1 <0.04 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.05 <0.1 <0.1 <0.04 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.05 <0.1 <0.1 <0.04 

Tetrachloromethane

Chlorobenzene

Chloroethane

Dibromochloromethane

PCODE 32102 34301 34311 32105 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.09 <0.03 <0.1 <0.2 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.09 <0.03 <0.1 E0.1 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.09 <0.03 <0.1 <0.2 ESWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.93 0.54 1.3 2.1 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.09 <0.03 <0.1 <0.2 <Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.09 <0.03 <0.1 <0.2 <Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.42 0.26 0.5 1.1 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.09 <0.03 <0.1 <0.2 <QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.09 <0.03 <0.1 <0.2 <QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.09 <0.03 <0.1 <0.2 
116 Table 12

Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and LovelaCalifornia—Continued

1,2-Dibromo-3-chloropropane

Dibromomethane

Bromodichloromethane

Dichlorodifluoromethane

PCODE 82625 30217 32101 34668 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.2 <0.05 E0.01 <0.1 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.2 <0.05 0.16 <0.1 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.2 <0.05 <0.05 <0.1 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 2.2 0.6 0.68 E1.3 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.2 <0.05 <0.05 <0.1 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.2 <0.05 <0.05 <0.1 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 1.3 0.31 0.28 E0.3 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.2 <0.05 <0.05 <0.1 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.2 <0.05 <0.05 <0.1 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.2 <0.05 <0.05 <0.1 

Hexachloroethane

Diethyl ether

Ethyl tert-butyl ether

tert-Pentyl methyl ether

PCODE 34396 81576 50004 50005 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.4 <0.2 <0.05 <0.1 <SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.4 <0.2 <0.05 <0.1 <SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.4 <0.2 <0.05 <0.1 <SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 4.7 2.1 0.53 1.1 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.4 <0.2 <0.05 <0.1 <Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.4 <0.2 <0.05 <0.1 <Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 1.5 0.9 0.27 0.7 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.4 <0.2 <0.05 <0.1 <QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.4 <0.2 <0.05 <0.1 <QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.4 <0.2 <0.05 <0.1 <
117 Table 12

Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and LovelaCalifornia—Continued

Hexachlorobutadiene

1,2,3,5-Tetramethylbenzene

Ethyl methacrylate

Methyl methacrylate

PCODE 39702 50000 73570 81597 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.1 <0.2 <0.3 <0.3 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.1 <0.2 <0.3 <0.3 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.1 <0.2 <0.3 <0.3 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 1.2 3.0 3.0 4.1 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.1 <0.2 <0.3 <0.3 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.1 <0.2 <0.3 <0.3 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.6 1.0 1.6 2.6 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.1 <0.2 <0.3 <0.3 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.1 <0.2 <0.3 <0.3 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.1 <0.2 <0.3 <0.3 

Methyl iodide

tert-Butyl methyl ether

Bromomethane

Chloromethane

PCODE 77424 78032 34413 34418 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.2 E0.1 <0.1 <0.2 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.2 0.2 <0.1 <0.2 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.2 <0.2 <0.1 <0.2 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike E1.3 2.1 E1.6 E1.8 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.2 E0.1 <0.1 <0.2 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.2 <0.2 <0.1 <0.2 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike E0.4 1.4 E0.5 E0.9 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.2 0.2 <0.1 — QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.2 <0.2 <0.1 <0.3 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.2 E0.1 <0.1 <0.2 
118 Table 12

Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and LovelaCalifornia—Continued

m- and p-Xylene

Naphthalene

2-Chlorotoluene O-Xylene

PCODE 85795 34696 77275 77135 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank E0.02 <0.2 <0.04 <0.06 <SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.06 <0.2 <0.04 <0.06 <SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank — <0.2 <0.04 <0.06 <SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 1.41 E5.4 0.54 0.71 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.06 <0.2 <0.04 <0.06 <Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.06 <0.2 <0.04 <0.06 <Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.63 1.5 0.23 0.33 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.06 <0.2 <0.04 <0.06 <QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.06 <0.2 <0.04 <0.06 <QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.06 <0.2 <0.04 <0.06 <

3-Chloropropene

Styrene

Tetrachloroethylene O-Ethyl toluene

PCODE 78109 77128 34475 77220 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (μg/L) (μg/L) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.2 E0.01 <0.1 <0.1 <SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.2 <0.04 <0.1 <0.1 <SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.2 <0.04 <0.1 <0.1 <SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 1 0.59 1.2 1.05 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.2 <0.04 <0.1 <0.1 <Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.2 <0.04 <0.1 <0.1 <Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.3 0.24 0.6 0.44 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.2 <0.04 <0.1 <0.1 <QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank <0.2 <0.04 <0.1 <0.1 <QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.2 <0.04 <0.1 <0.1 <
119 Table 12

Table 12. Quality assurance analytical results for volatile organic compound (VOC) concentrations in water samples, Sweetwater and LovelaCalifornia—Continued

Trichloroethylene Vinyl chloride

1,4-Bromofluorobenzene (surrogate)

1,2-Dichloroethaned4 (surrogate) 

PCODE 34488 39175 99834 99832 

Site name Date Time Site ID Sample type (μg/L) (μg/L) (%) (%) 

SWR near Vista Del Lago station 12-Jul-1999 1208 324139117000801 Blank <0.09 <0.1 95 105 SWR center of minimum pool 1-Mar-1999 1131 324131117000101 Replicate <0.09 <0.1 88 107 SWR center of minimum pool 1-Mar-1999 1138 324131117000101 Blank <0.09 <0.1 91 108 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.94 1.3 100 93 Loveland Reservoir near dam site 1 4-Nov-1998 1041 324703116473101 Replicate <0.09 <0.1 109 130 Loveland Reservoir near dam site 1 4-Nov-1998 1048 324703116473101 Blank <0.09 <0.1 104 118 Loveland Reservoir near dam site 1 21-Sep-1999 1023 324703116473101 Spike 0.38 0.4 88 92 Loveland Reservoir East end near source inlet site 2 4-May-1999 1131 324737116453501 Replicate <0.09 <0.1 92 106 QC/QA site for Sacramento project office CA 9-Sep-1998 1418 88888801 Blank 0.09 0.1 96 92 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank 0.09 0.1 92 104 
120 Table 13

Table 13. Quality assurance analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, Californ[Time is denoted in 24-hour scale. An “E” indicates that the value has been estimated because of interference or is below method reporting limits. The numbe

is its parameter code (PCODE). ID, identification; SWR, Sweetwater Reservoir; QC, quality control; QA, quality assurance; CA, California; %, percentage re

detected at a concentration above the reporting level; mg/L, milligram per liter]

2,6-Diethylaniline 

Acetochlor

Alachlor

alpha-HCH

PCODE 82660 49260 46342 34253 

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) (mg/L

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.003 <0.002 <0.002 <0.00SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.003 <0.002 <0.002 <0.00SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.101 0.117 0.123 0.13SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.003 <0.002 <0.002 <0.00Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.095 0.101 0.120 0.09QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.003 <0.002 <0.002 <0.00QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.003 <0.002 <0.002 <0.00

Butylate 

Carbaryl

Carbofuran

Chlorpyifos 

PCODE 4028 82680 82674 3893

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) (mg/L

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.002 <0.003 <0.003 <0.00SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate 0.002 <0.003 <0.003 <0.00SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.120 E1.000 E0.524 0.1SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.002 <0.003 <0.003 <0.00Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.108 E0.104 E0.137 0.10QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.002 <0.003 <0.003 <0.00QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank 0.002 <0.003 <0.003 <0.00
121 Table 13

Deethylatrazine 

Diazinon

Dieldrin

PCODE 4040 39572 39381 

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) 

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.002 <0.002 <0.001 SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.002 <0.002 <0.001 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike E0.069 0.126 0.102 SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.002 <0.002 <0.001 Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike E0.042 0.106 0.105 QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.002 <0.002 <0.001 QC/QA site for Sacramento project office CA 7-Sep-1998 1118 88888801 Blank <0.002 <0.002 <0.001 

Ethoprophos

Fonofos

Lindane

PCODE 82672 4095 39341 

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) 

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.003 <0.003 <0.004 SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.003 <0.003 <0.004 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.107 0.119 0.119 SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.003 <0.003 <0.004 Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.111 0.101 0.091 QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.003 <0.003 <0.004 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.003 <0.003 <0.004 

Table 13. Quality assurance analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, Californi
122 Table 13

Parathion-methyl 

Metolachor

Metribuzin

PCODE 82667 39415 82630 

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) 

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.006 <0.002 <0.004 SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.006 <0.002 <0.004 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.172 0.118 0.126 SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.006 <0.002 <0.004 Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.112 0.117 0.082 QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.006 <0.002 <0.004 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.006 <0.002 <0.004 

 Parathion 

Pebulate

Pendimethalin 

PCODE 39542 82669 82683 

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) 

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.004 <0.004 <0.004 SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.004 <0.004 <0.004 SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.181 0.122 0.115 SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.004 <0.004 <0.004 Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.130 0.110 0.102 QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank 0.004 <0.004 <0.004 QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank 0.004 <0.004 <0.004 

Table 13. Quality assurance analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, Californi
123 Table 13

Propyzamide

Propachlor

Propanil

Propargite

PCODE 82676 4024 82679 82685 

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) (mg/L

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.003 <0.007 <0.004 <0.01SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.003 <0.007 <0.004 <0.01SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.129 0.131 0.127 0.11SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.003 <0.007 <0.004 <0.01Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.100 0.124 0.124 0.10QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.003 <0.007 <0.004 <0.01QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.003 <0.007 <0.004 <0.01

Terbufos

 Terbuthylazine 

Thiobencarb Triallate 

PCODE 82675 91064 82681 82

Site name Date Time Site ID Sample type (mg/L) (mg/L) (mg/L) (m

SWR near pump tower 12-Jul-1999 1131 324130117002501 Replicate <0.013 E0.0551 <0.002 <0SWR center of minimum pool 6-Jan-1999 1031 324131117000101 Replicate <0.013 111 <0.002 <0SWR east end reservoir fill boundary 10-Sep-1998 1313 324209116585001 Spike 0.098 101 0.121 0SWR east end reservoir fill boundary 1-Mar-1999 1248 324209116585001 Blank <0.013 108 <0.002 <0Loveland Reservoir near dam site 1 2-Mar-1999 1153 324703116473101 Spike 0.092 106 0.105 0QC/QA site for Sacramento project office CA 9-Sep-1998 1408 88888801 Blank <0.013 98.8 <0.002 <0QC/QA site for Sacramento project office CA 7-Sep-1999 1118 88888801 Blank <0.013 -999999 <0.002 <0

Table 13. Quality assurance analytical results for pesticide concentrations in water samples, Sweetwater and Loveland Reservoirs, San Diego County, Californi
124 Table 14

Table 14. Quality assurance analytical results for polynuclear aromatic hydrocarbon compound concentrations in core segments and urban runoff diver

sediment samples, Sweetwater Reservoir, San Diego County, California 

[An “E” indicates that the value has been estimated because of interference or is below method reporting limits. The number given below a compoPCODE (if a code has been assigned). Calif., California; CRM, Certified Reference material; Dup, duplicate; NA, not analyzed; PAH, polynuQA, quality assurrance; Surf. Bed Sed., surficial bed sediment; SWR, Sweetwater Reservoir; URDS, urban runoff diversion system. %, percentage redetected at a concentration above the reporting level; μg/kg, microgram per kilogram]
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

Phenol

p -cresol

C8-alkyl-phenol

Naphthalene

C1-128 isomers

2-ethyl-naphthalene

2,6-dimethylnaphthalene

1,6-dimethylnaphthalene

PCODE 49413 49451 49402 49948 49406 49404

Date Site ID Type (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

Sep-1998 983649001 Spike 52.0 E10.2 NA 78.8 NA 68.5 79.7 87.5Sep-1998 983648001 Blank E1.3 E0.9 NA <5 <5 <5 <5 <5

Sep-1998 98365crm352 Spike NA NA NA 44.9 NA NA NA NA

Sep-1998 983299000 Spike 68.1 45.4 NA 80.9 NA 81.3 80.2 75.2Sep-1998 983298000 Blank E1.0 <5 NA <5 <5 <5 <5 <5

Sep-1998 98329crm352 Spike NA NA NA 57.3 NA NA NA NA

Nov-1998 990128002 Blank E0.8 <5 NA E0.4 NA NA <5 <5Nov-1998 990129002 Spike 70.9 22.3 NA 105 NA 98.4 95.5 97.8Nov-1998 99011crm352 Spike NA NA NA 49.7 NA NA NA NA

Nov-1998 324142117001301 Spike 52.0 E10.2 NA 78.8 NA 68.5 79.7 87.5Nov-1998 324142117001301 Blank E1.3 E0.9 NA <5 <5 <5 <5 <5Nov-1998 324142117001301 Dup 141 E523 NA 27.5 160 11.1 46.0 44.2

Nov-1998 324126116595701 Dup 55.6 E964 NA E9.7 35.8 <10 E284 26.9
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

C2-128 isomers

Acenaphthylene

1,2-dimethylnaphthalene

Acenaphthene

C3-128 isomers

2,3,6-trimethylnaphthalene

9H-Fluorene

C4-128 isomers

49403 49429 49399

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

NA 65.1 83.8 71.1 NA 70.4 68.2 NA<5 <5 <5 <5 <5 <5 <5 <5NA NA NA 51.8 NA NA NA NANA 78.8 75.3 79.8 NA 78.0 74.8 NA<5 <5 <5 <5 <5 <5 <5 <5NA NA NA 61.9 NA NA NA NA <5 <5 <5 <5 <5 <5 <5 <5NA 92.1 95.1 95.8 NA 107 114 NANA NA NA 59.6 NA NA NA NANA 65.1 83.8 71.1 NA 70.4 68.2 NA<5 <5 <5 <5 <5 <5 <5 <5E262 26.2 26.4 <10 157 20.6 <15.0 85.0311 E4.0 <10 <10 54.3 E3.5 18.6 52.3
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

1-methyl-9H-Fluorene

C1-166 isomers

dibenzo-thiphene

Phenanthrene

Anthracene

Acridine

Phenanthridine

9H-carbazol

49398 49409 49434

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

73.8 NA NA 76.8 71.9 NA NA NA<5 NA NA <5 <5 NA NA NANA NA NA NA 49.2 NA NA NA75.8 NA NA 84.4 74.8 NA NA NA<5 NA NA <5 <5 NA NA NANA NA NA NA 48.4 NA NA NAE0.8 NA NA <5 <5 NA NA NA121 NA NA 108 95.9 NA NA NANA NA NA NA 50.8 NA NA NA73.8 NA NA 76.8 71.9 NA NA NA<5 NA NA <5 <5 NA NA NA<20.0 NA NA 226 42.8 NA NA NAE9.9 NA NA 20.9 E4.2 NA NA NA
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

C5-128 isomers

C2-166 isomers

2-Methyl-Anthracene

4,5-methylenephenanthrene

C1-178 isomers

1-Methyl-Phenanthrene

C3-166 isomers

C2-178 isomers

49435 49411 49410

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

NA NA 63.6 77.8 NA 83.0 NA NA<5 NA <5 <5 <5 <5 NA <5NA NA NA NA NA NA NA NANA NA 71.4 83.1 NA 86.6 NA NA<5 NA <5 <5 <5 <5 NA <5NA NA NA NA NA NA NA NA <5 NA <5 <5 <5 <5 NA <5NA NA 91.9 103 NA 103 NA NANA NA NA NA NA NA NA NANA NA 63.6 77.8 NA 83.0 NA NA<5 NA <5 <5 <5 <5 NA <566.7 NA 16.2 42.0 322 56.3 NA 595<10 NA <10 E6.7 E6.0 E4.4 NA E5.0
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

Fluoranthene

Pyrene

C3-178 isomers

C4-178 isomers

1-Methyl-Pyrene

C1-202 isomers

C2-202 isomers

C5-178 isomers

49466 49387 49388

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

75.7 77.3 NA NA NA NA NA NA<5 <5 <5 <5 <5 <5 <5 <5NA 112 NA NA NA NA NA NA96.0 85.0 NA NA NA NA NA NA<5 <5 <5 <5 <5 <5 <5 <5NA 57.7 NA NA NA NA NA NA <5 <5 <5 <5 <5 <5 <5 <5119 118 NA NA NA NA NA NANA E343 NA NA NA NA NA NA75.7 77.3 NA NA NA NA NA NA<5 <5 <5 <5 <5 <5 <5 <5255 254 435 202 36.0 200 436 <80020.2 18.8 <10 <10 E2.8 12.1 <10 <10
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

Benz (a) Anthracene

Chrysene

C3-202 isomers

C1-228 isomers

C4-202 isomers

C5-202 isomers

C2-228 isomers

Benzo (b) fluoranthene

49436 49450 49458

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

123 133 NA NA NA NA NA 123<5 <5 <5 <5 <5 <5 <5 <5NA 98.6 NA NA NA NA NA 10785.6 78.4 NA NA NA NA NA 82.8<5 <5 <5 <5 <5 <5 <5 <5NA 63.1 NA NA NA NA NA 73.2 <5 <5 <5 <5 <5 <5 <5 <5112 119 NA NA NA NA NA 134NA 71.3 NA NA NA NA NA 84.3122.9 133.1 NA NA NA NA NA 122.6<5 <5 <5 <5 <5 <5 <5 <5128 229 158 405 171 101 645 129E7.0 13.4 <10 <10 <10 <10 <10 16.6
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

Benzo (k) fluoranthene

Benzo (e) pyrene

Benzo (a) pyrene

Perylene

C1-252 isomers

C3-228 isomers

C2-252 isomers

C4-228 isomers

49397 49389

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

115 89.5 98.0 72.3 NA NA NA NA<5 <5 <5 <5 <5 <5 <5 <5NA NA 89.2 NA NA NA NA NA81.8 65.9 71.8 57.9 NA NA NA NA<5 <5 <5 <5 <5 <5 <5 <5NA NA 61.2 NA NA NA NA NA <5 <5 <5 <5 <5 <5 <5 <5139 112.1 115 99.6 NA NA NA NANA NA 70.2 NA NA NA NA NA115.2 89.5 98.0 72.3 NA NA NA NA<5 <5 <5 <5 <5 <5 <5 <579.5 174 75.8 117 467 <300 278 <80E8.4 15.2 E8.7 E497 <10 <10 <10 <10
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

Benzo (g,h,i) perylene

Indeno (1,2,3-c,d) 

pyrene 

Dibenzo (a,h) 

anthracene

C3-252 isomers

C4-252 isomers

C5-228 isomers

C5-252 isomers

Coronene

49408 49390 49461

(μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg) (μg/kg)

101 112 101 NA NA NA NA E63.3<5 <5 <5 <5 <5 <5 <5 <5NA NA NA NA NA NA NA NA56.3 78.3 78.3 NA NA NA NA E17.7<5 <5 <5 <5 <5 <5 <5 <5NA NA NA NA NA NA NA NA <5 <5 <5 <5 <5 <5 <5 <5103 125 120 NA NA NA NA E41.3NA NA NA NA NA NA NA NA101 112 101 NA NA NA NA E63.3<5 <5 <5 <5 <5 <5 <5 <5241 63.5 25.4 148 <10 <10 <10 E65.5E7.9 E7.8 <10 <10 <10 <10 <10 <10
 for PAHs in core segments, surficial bed sediment, and URDS samples from the SWR, San Diego County, Calif.—Continued

PCODE

Date Site ID Type

Sep-1998 983649001 SpikeSep-1998 983648001 Blank

Sep-1998 98365crm352 Spike

Sep-1998 983299000 SpikeSep-1998 983298000 Blank

Sep-1998 98329crm352 Spike

Nov-1998 990128002 BlankNov-1998 990129002 SpikeNov-1998 99011crm352 Spike

Nov-1998 324142117001301 SpikeNov-1998 324142117001301 BlankNov-1998 324142117001301 Dup

Nov-1998 324126116595701 Dup

Nitrobenzene-d5 

(surrogate)

2-Fluorobiphenyl 

(surrogate)

Terphenyl-d14 

(surrogate)

(%) (%) (%)

NA NA NANA NA NANA NA NANA NA NANA NA NANA NA NA43 60 10965 77 13556 78 13353 54 9487 79 89NA 86 93131 81 97
134 Table 15 

Table 15. Quality assurance analytical results for organochlorine concentrations in select core segments and in reservoir and urban runoff diversion s

sediments from the Sweetwater Reservoir, San Diego County, California 

[Dup, duplicate; NA, not analyzed; SWR, Sweetwater Reservoir.%, percentage recovery; <, compound was not detected at a concentration above the rep

kilogram]

 Site name Date Site identification number Type Lindane (μg/kg) Hepta- chlor (μg/kg) Aldrin (μg/kg) Heptachlor epoxide (μg/kg) Chlor- dane (μg/kg) Endo- sulfan I (μg/kg) Dieldrin (μg/kg) 

SWR near recreation area 09-Sep-1998 324126116595702 Dup <1.25 <1.25 <1.25 <1.25 <12.50 <1.25 <1.25 URDS Vista del Lago_01 05-Nov-1998 324142117001301 Dup <1.1 <1.10 <1.00 <1.30 109.0 <2.90 <1.00 

 Site name Date Site identification number Type p,p'-DDT (μg/kg)

p,p'-

Methoxychlor

 (μg/kg)

Mirex

 (μg/kg)

Toxaphene

 (μg/kg)

Arochlor 

1242

 (μg/kg)

Arochlor 

1254

 (μg/kg)

Arochlor 

1260

 (μg/kg)

Tota

PCB

 (μg/k

SWR near recreation area 09-Sep-1998 324126116595702 Dup <1.25 <5.00 <1.25 <125 <12.50 <12.50 <12.50 NA URDS Vista del Lago_01 05-Nov-1998 324142117001301 Dup <10.00 <11.00 <1.00 <100 <10.00 6.70 NA NA