VERIFICATION AND ADJUSTMENT OF REGIONAL 

REGRESSION MODELS FOR URBAN STORMRUNOFF QUALITY USING DATA COLLECTED IN 

LITTLE ROCK, ARKANSAS

by C. Shane Barks

U.S. GEOLOGICAL SURVEY

Water-Resources Investigations Report 94-4216

Prepared in cooperation with the 

CITY OF LITTLE ROCK, ARKANSAS

Little Rock, Arkansas 

1995
U.S. DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY 

Gordon P. Eaton, Director

For additional information Copies of this report can be 

write to: purchased from:

District Chief U.S. Geological Survey 

U.S. Geological Survey, WRD Earth Science Information Center 

401 Hardin Road Open-File Reports Section 

Little Rock, AR 72211 Box 25286, MS 517

Denver Federal Center 

Denver, CO 80225
CONTENTS

Page

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

Introduction ...............................................................................2

Purpose and scope...................................................................2

Description of study area .............................................................2

Little Rock data base ........................................................................4

Verification and adjustment of regional regression models........................................6

Data analysis........................................................................8

Calibration and error analysis.........................................................9

Example application ....................................................................... 10

Summary................................................................................. 11

References................................................................................12

Appendix-Water-quality data collected in Little Rock, Arkansas................................ 1-1

ILLUSTRATIONS

Figure 1. Map showing location of study area.................................................. 3

TABLES

Table 1. Basin characteristics for the Little Rock data base....................................... 4

2. Summary of regression models for storm-runoff loads and mean concentrations for region

III............................................................................. 5

3. Ranges of values of explanatory variables in the Little Rock data base..................... 6

4. Analysis of the Little Rock data base.................................................. 7

5. Simple estimators for selected constituents for the Little Rock data base ................... 8

6. Calibration coefficients and error statistics for adjusted models for the Little Rock data

base........................................................................... 9
CONVERSION FACTORS

Multiply By To obtain

inch 25.4 millimeter

foot 0.3048 meter

mile 1.609 kilometer

acre 0.4047 square kilometer

square mile 2.589 square kilometer

cubic foot 0.02832 cubic meter

pound 0.4536 kilogram

Temperature in degrees Celsius (°C) can be converted to degrees Fahrenheit (°F) using the following equation:

°F=1.8x°C + 32

ABBREVIATIONS

COD Chemical oxygen demand in storm-runoff load, in pounds, or in storm-runoff mean concentration, 

in milligrams per liter.

CU Total recoverable copper in storm-runoff load, in pounds, or in storm-runoff mean concentration, in 

micrograms per liter.

DA Total contributing drainage area, in square miles.

DP Dissolved phosphorus in storm-runoff load, in pounds, or in storm-runoff mean concentration, in 

milligrams per liter.

IA Impervious area, as a percent of total contributing drainage area.

INT Maximum 24-hour precipitation intensity that has a 2-year recurrence interval, in inches.

LUC Commercial land use, as a percent of total contributing drainage area.

LUI Industrial land use, as a percent of total contributing drainage area.

LUN Nonurban land use, as a percent of total contributing drainage area.

LUR Residential land use, as a percent of total contributing drainage area.

MAP-R-P Model adjustment procedure based upon regression with observed values against predicted values.

MAR Mean annual rainfall, in inches.

IV
ABBREVIATIONS (continued)

MJT Mean minimum January temperature, in degrees Fahrenheit

MNL Mean annual nitrogen load in precipitation, in pounds of nitrogen per acre.

O Observed values of storm-runoff loads or mean concentrations.

PB Total recoverable lead in storm-runoff load, in pounds, or in storm-runoff mean concentration, in 

micrograms per liter.

Pu Predicted values of storm-runoff loads or mean concentrations. 

SE Standard error of estimate.

SS Suspended solids in storm-runoff load, in pounds, or in storm-runoff mean concentration, in 

milligrams per liter.

TKN Total ammonia plus organic nitrogen as nitrogen in storm-runoff load, in pounds, or in storm-runoff 

mean concentration, in milligrams per liter.

TN Total nitrogen in storm-runoff load, in pounds, or in storm-runoff mean concentration, in milligrams 

per liter.

TP Total phosphorus in storm-runoff load, in pounds, or in storm-runoff mean concentration, in 

milligrams per liter.

TRN Total storm rainfall, in inches.

ZN Total recoverable zinc in storm-runoff load, in pounds, or in storm-runoff mean concentration, in 

micrograms per liter.
VERIFICATION AND ADJUSTMENT OF REGIONAL REGRESSION

MODELS FOR URBAN STORM-RUNOFF QUALITY USING

DATA COLLECTED IN LITTLE ROCK, ARKANSAS

By C. Shone Barks

ABSTRACT

Storm-runoff water-quality data were used to verify and, when appropriate, adjust regional 

regression models previously developed to estimate urban storm-runoff loads and mean concentrations in 

Little Rock, Arkansas. Data collected at 5 representative sites during 22 storms from June 1992 through 

January 1994 compose the Little Rock data base.

Comparison of observed values (O) of storm-runoff loads and mean concentrations to the predicted 

values (Pu) from the regional regression models for nine constituents (chemical oxygen demand, 

suspended solids, total nitrogen, total ammonia plus organic nitrogen as nitrogen, total phosphorus, 

dissolved phosphorus, total recoverable copper, total recoverable lead, and total recoverable zinc) shows 

large prediction errors ranging from 63 to several thousand percent. Prediction errors for six of the 

regional regression models are less than 100 percent, and can be considered reasonable for water-quality 

models.

Differences between O and Pu are due to variability in the Little Rock data base and error in the 

regional models. Where applicable, a model adjustment procedure (termed MAP-R-P) based upon 

regression with O against Pu was applied to improve predictive accuracy.

For 11 of the 18 regional water-quality models, O and Pu are significantly correlated, that is much of 

the variation in O is explained by the regional models. Five of these 11 regional models consistently 

overestimate O; therefore, MAP-R-P can be used to provide a better estimate. For the remaining seven 

regional models, O and Pu are not significantly correlated, thus neither the unadjusted regional models nor 

the MAP-R-P is appropriate. A simple estimator, such as the mean of the observed values may be used if 

the regression models are not appropriate.

Standard error of estimate of the adjusted models ranges from 48 to 130 percent. Calibration results 

may be biased due to the limited data set sizes in the Little Rock data base. The relatively large values of 

standard error of estimate for some of the constituent models may be unacceptable for some applications. 

The user may need to collect additional local data for these constituents and repeat the model adjustment 

procedure analysis or calibrate an independent local regression model.
INTRODUCTION

Storm runoff has been determined to be a major source of nonpoint-source pollution in metropolitan 

areas. The city of Little Rock is a growing urban center in central Arkansas with an estimated population 

of 176,870 in 1992 (Arkansas State Data Center, oral commun., 1994). As in any metropolitan area, 

municipal storm sewer systems have been installed to provide drainage for developed areas. In a 

widespread area supporting a large population such as Little Rock, the storm-runoff loads associated with 

discharges from separate storm sewers can have significant impact on water quality in receiving streams 

even though the storm-runoff concentrations are often low relative to many industrial and municipal 

wastewater discharges. Urban water-quality managers need data on storm-runoff loads for representative 

watersheds in their city to design remedial programs.

The final rule implementing the Water Quality Act of 1987, published by the U.S. Environmental 

Protection Agency, requires municipalities with a population of 100,000 or greater to:

 characterize the quality and quantity of discharge from representative storm-sewer outfalls 

during representative storm events; and

 estimate annual and seasonal pollutant loadings from each major storm-sewer outfall in the 

reporting area (U.S. Environmental Protection Agency, 1990, p. 47990-48091).

In 1992, the U.S. Geological Survey, in cooperation with the city of Little Rock, began a study to 

characterize the storm-runoff water quality and to investigate procedures for estimating storm-runoff 

loads and concentrations for selected constituents. Rainfall, discharge, and water-quality data were 

collected during representative storm events between June 1992 and January 1994, at five representative 

catchment areas in the city of Little Rock. The local data collected were used to verify and adjust regional 

regression models for estimating storm-runoff loads and concentrations (Driver and Tasker, 1990). A 

model adjustment procedure (Hoos and Sisolak, 1993) was used to adjust the selected regional models for 

use in the Little Rock area.

Purpose and Scope

This report presents and describes an approach for estimating urban storm-runoff quality for the 

Little Rock area. Verification and calibration error statistics are presented for regional regression models 

used to estimate storm-runoff loads and mean concentrations. Calibration coefficients are presented for 

three load models and two concentration models. Simple estimators (mean of observed values) are 

described for two load models and five concentration models that could not be verified or adjusted. Also 

presented is an example that demonstrates the use of an adjusted model to estimate the load of total 

recoverable copper in storm runoff from an unmonitored catchment. The storm-runoff quality data 

collected at 5 sites during 22 storms are included in the appendix.

Description of Study Area

Little Rock is located in the geographic center of Arkansas (fig. 1), and drained solely by the 

Arkansas River. This area is divided physiographically into the Interior Highlands in the northwestern 

part and the Coastal Plain in the southeastern part (Plebuch and Hines, 1967). The Interior Highlands are 

underlain by consolidated rocks and the Coastal Plain is underlain by a thick sequence of unconsolidated 

sediments.

Little Rock occupies about 105 square miles, of which 11 percent is industrial; 10 percent 

commercial; 35 percent residential; and 42 percent undeveloped land use. Little Rock also consists of 2 

percent agricultural land use.

For the Little Rock area, the maximum 24-hour precipitation intensity that has a 2-year recurrence 

interval (INT) is 4.1 inches (Hershfield, 1961). The mean annual rainfall (MAR) is 49.25 inches (National 

Weather Service, oral commun., 1993). The mean annual nitrogen load (MNL) in precipitation is 14.2 

pounds of nitrogen per acre (Arkansas Department of Pollution Control and Ecology, oral commun., 1993). 

The coldest weather usually occurs in January with a mean minimum January temperature (MJT) of 

29.4° F (National Weather Service, oral commun., 1993).
94' 93' 92* 90'

36"

2,5

EXPLANATION

U.S. GEOLOGICAL SURVEY

SAMPLING SITE AND

NUMBER

5 MILES 

__I

2.5 

I_

5 KILOMETERS

Figure 1. Location of study area.
LITTLE ROCK DATA BASE

Samples were collected at 5 sites during 22 storms from June 1992 through January 1994. The waterquality data were compiled in a data base referred to in this report as the Little Rock data base. The station 

locations were selected based upon representative basin characteristics including total contributing 

drainage area, impervious area, industrial land use, commercial land use, residential land use, and 

undeveloped land use (table 1). Flow-weighted composite water-quality samples were collected during 

the duration of the storms or during the first 3 hours of the hydrograph if the duration of the storms 

exceeded 3 hours. Total storm rainfall (TRN) was calculated for each event by summing the measured 

rainfall amounts before and during the sampling only. Storm-runoff volume was calculated from the 

measured discharge that occurred during sampling.

Table 1. Basin characteristics for the Little Rock data base

[DA, total contributing drainage area; IA, impervious area; LUI, industrial land use; 

LUC, commercial land use; LUR, residential land use; LUN, undeveloped land use]

Station 

number

07263453

07263559

07263578

07263592

07263602

DA 

(square miles)

0.18

.08

.54

.28

.10

IA 

(percent)

5

10

20

60

35

LUI 

(percent)

0

0

0

0

80

LUC 

(percent)

0

0

0

100

0

LUR 

(percent)

10

80

100

0

20

LUN 

(percent)

90

20

0

0

0

Storm-runoff loads were calculated for chemical oxygen demand (COD), suspended solids (SS), 

total nitrogen (TN), total ammonia plus organic nitrogen as nitrogen (TKN), total phosphorus (TP), 

dissolved phosphorus (DP), total recoverable copper (CU), total recoverable lead (PB), and total 

recoverable zinc (ZN). Values for the storm-runoff loads were calculated by multiplying the storm-runoff 

mean concentrations (see appendix) by the storm-runoff volumes and by a conversion factor.

Predicted values of storm-runoff load and mean concentration for each of the monitored storms 

were computed from the linear regression models for region III presented in table 2 (Driver and Tasker, 

1990). Region III consists of areas within the United States that have mean annual rainfalls equal to or 

greater than 40 inches. If appropriate, a model adjustment procedure was used to provide a more accurate 

estimate (as compared to the regional models) for storm-runoff quality in Little Rock. The model 

adjustment procedure can be expected to provide more accurate estimates of storm-runoff quality at a 

wide range of monitored sites in Little Rock if the Little Rock data base used for the adjustment represents 

a large range of physical, land-use, and storm characteristics. The range, mean, and median are 

determined from all 22 observations in the data base (table 3). These values may be slightly different for 

data sets from which water-quality data for certain storms are missing.
Table 2. Summary of regression models for storm-runoff loads and mean concentrations for region III

A /

[Po , regression coefficient that is the intercept in the regression model; TRN, total storm rainfall; DA, total 

contributing drainage area; IA, impervious area; LUI, industrial land use; LUC, commercial land use; LUR, 

residential land use; LUN, undeveloped land use; INT, maximum 24-hour precipitation intensity that has a 

2-year recurrence interval; MAR, mean annual rainfall; MNL, mean annual nitrogen load in precipitation; 

MJT, mean minimum January temperature; -BCF, bias correction factor; COD, chemical oxygen demand; 

LOAD, storm-runoff load, in pounds; SS, suspended solids; TN, total nitrogen; TKN, total ammonia plus 

organic nitrogen as nitrogen; TP, total phosphorus; DP, dissolved phosphorus; CU, total recoverable copper; 

PB, total recoverable lead; ZN, total recoverable zinc; CONC, storm-runoff mean concentration, in 

milligrams per liter (except for CU, PB, and ZN which are in micrograms per liter); dashes ( ) indicate that 

the variable is not included in the model; equation form is:

Response 

variable

COD.LOAD

SS.LOAD

TN.LOAD

TKN.LOAD

TP.LOAD

DP.LOAD

CU.LOAD

PB.LOAD

ZN.LOAD

COD.CONC

SS.CONC

TN.CONC

TKN.CONC

TP.CONC

DP.CONC

CU.CONC

PB.CONC

ZN.CONC

to'

479

1,990

0.361

199,572

53.2

.369

4.508

.081

4.355

46.9

176

26,915

9,549

1630

.060

1,774

39.8

1,879

TRN

(inches)

0.857

1.017

.776

.875

1.019

.955

.896

.852

.830

-.179

.054

-.253

-.157

-.016

.189

-.104

-.196

-.149

DA 

(square 

miles)

0.634

.984

.474

.393

.846

.471

.609

.857

.555

-.047

.286

-.169

-.159

-.107

-.076

-.077

.123

-.061

Regression coefficients

MNL

(pounds MJT 

of (degrees 

IA+1 LUI+1 LUC+1 LUR+1 LUN +2 INT MAR nitrogen Fahren- 

(percent) (percent) (percent) (percent) (percent) (inches) (inches) per acre) heit) BCF

0.321 0.217 - -0.111 - - - - 1.865

.226 .228 - -.286 - 2.477

0.611 ______ 0.863 - 1.709

.082 -1643 - - 1.736

.189 0.103 -.160 - - - -0.754 1059

- .364 - - - - 2.027

.648 .253 - -.328 -1071 - 1149

.999 --------- 2.314

.402 .287 -.191 - -.500 1.942

.320 .031 - -.169 - 1.270

.168 .072 - -.295 - 1.928

.057 - -2.737 - - 1.308

- - - - -.086 - -1447 - - 1.326

.053 .184 -.168 - -.710 1.365

----- .358 - - - - 1.341

.446 .078 - -.204 -3.247 - 1.348

.404 ----- ----- 1.510

.285 .146 -.078 - -.916 1.322
Table 3.-Ranges of values of explanatory variables in the Little Rock data base

[TRN, total storm rainfall; DA, total contributing drainage area; IA, impervious area; LUI, 

industrial land use; LUC, commercial land use; LUR, residential land use; LUN, 

undeveloped land use]

Explanatory variable Minimum Maximum Mean Median

TRN, inches

DA, square miles

IA, percent

LUI, percent

LUC, percent

LUR, percent

LUN, percent

0.25

.08

5

0

0

0

0

1.25

.54

60

80

100

100

90

0.74

.24

26

16

20

42

22

0.72

.18

20

0

0

20

0

Ranges of values for TRN, DA, LUI, LUC, LUR, MAR, and MJT in the Little Rock data base are 

within the ranges of values in the Nationwide Urban Runoff Program (NURP) region III data base, which 

were used to develop the regional regression models (compare to Driver and Tasker, 1990, table 4). 

Maximum values for LUN, INT, and MNL in the Little Rock data base, however, are considerably larger 

than the maximum values in the NURP region III data base.

VERIFICATION AND ADJUSTMENT OF REGIONAL REGRESSION MODELS

Comparison of observed values (O) of storm-runoff load and mean concentration in the Little Rock 

data base to predicted values from the regional regression models (Pu) shows large prediction errors for 

almost all constituent models. Values for root mean square error (RMSE) range from 0.251 log units (63 

percent) for TN load to over several thousand percent for CU load (table 4, column 2). The RMSE's for the 

COD, TN, and TP load models and the COD, TN, and TKN concentration models are smaller than 0.36 log 

units (100 percent), which can be considered reasonable for water-quality models.

Differences between O and Pu are caused by variability in the Little Rock data base or by error in the 

regional models. For most of the constituents, the RMSE is too large to be reasonably explained by 

variability alone. Some of the prediction error is attributed to error in the regional models due in part to 

differences in physiographic settings. In the NURP region III data base, 8 of the 11 cities are in, or very 

close to, a coastal setting (Driver and Tasker, 1990, figure 1). Furthermore, most of the cities in the NURP 

region III data base are larger and have been established longer than Little Rock.

With such high RMSE's, it would be inappropriate to use several of the regional regression models 

to estimate storm-runoff loads and mean concentrations in Little Rock. Because of a maximum data set 

size of 22, local regression models could not be developed using only the Little Rock data base. An 

alternative is to use model adjustment procedures to combine the regional model predictions with local 

data, thereby effectively increasing the size of the local data base (Hoos and Sisolak, 1993).
Table 4. Analysis of the Little Rock data base

[RMSE, root mean square error between observed values and predicted (from unadjusted 

regional model) values, in log units; O, observed value; Pu, predicted value from unadjusted 

regional model; rs, Spearmans rho; 0.05, selected level of significance for the test statistic; COD, 

chemical oxygen demand; LOAD, storm-runoff load; SS, suspended solids; TN, total nitrogen; 

DP, dissolved phosphorus; TKN, total ammonia plus organic nitrogen as nitrogen; TP, total 

phosphorus; CU, total recoverable copper; PB, total recoverable lead; ZN, total recoverable zinc; 

CONC, storm-runoff mean concentration; NA, not applicable; P, positive (model overestimates 

O)]

Constituent 

name, model 

type

COD.LOAD

SS.LOAD

TN.LOAD

TKN.LOAD

TRLOAD

DP.LOAD

CU.LOAD

PB.LOAD

ZN.LOAD

COD.CONC

SS.CONC

TN.CONC

TKN.CONC

TP.CONC

DP.CONC

CU.CONC

PB.CONC

ZN.CONC

O and Pu positively 

correlated

RMSE

0.280

.513

.251

.434

.310

.585

3.277

1.158

.424

.342

.590

.323

.336

.376

.409

.720

1.210

.432

Consistent direction of 

bias

Significant at Significant at 

rs 0.05? p-value 0.05?

0.681

.534

.745

-.443

.513

-.270

.677

.803

.863

-.056

-.277

.133

.167

.522

.403

.540

.261

.781

yes

yes

yes

no

yes

no

yes

yes

yes

no

no

no

no

yes

yes

yes

no

yes

1.168

.286

.026

.664

.664

.026

.000

.000

.052

1.176

.524

.189

.383

.078

.814

.000

.000

.000

no

no

yes

no

no

yes

yes

yes

no

no

no

no

no

no

no

yes

yes

yes

Direction 

of bias

NA

NA

P

NA

NA

P

P

P

NA

NA

NA

NA

NA

NA

NA

P

P

P

Best model

regional

regional

adjusted

none

regional

none

adjusted

adjusted

regional

none

none

none

none

regional

regional

adjusted

none

adjusted
Data Analysis

Due to the size of the data set, the only model adjustment procedure (termed MAP-R-P) considered 

is based on linear regression with O against Pu. In this procedure, the log-transformed observed values are 

regressed against the log-transformed predicted values from the unadjusted regional model (Hoos and 

Sisolak, 1993). To apply MAP-R-P, O and Pu need to be positively correlated and have a consistent 

direction of bias. Values for these test statistics are presented in table 4. For all of the load models, except 

TKN and DP, much of the variation in O is explained by the regional models. Of these models, the 

direction of bias of Pu relative to O is not consistent for COD, SS, TP, and ZN, thereby validating the 

unadjusted regional models. For TN, CU, and PB, the direction of bias of Pu relative to O is consistent and

positive; that is, the regional models consistently overestimated O, and MAP-R-P can be used to provide a 

better estimate. Because the regional models do not explain much of the variation in O for TKN and DP, 

neither the unadjusted regional models nor the MAP-R-P is appropriate. A simple estimator, such as the 

mean of the observed load values (table 5) may be used, or additional data may be collected to calibrate a 

local model.

Table 5.-Simple estimators for selected constituents for the Little Rock data base

[TKN, total ammonia plus organic nitrogen as nitrogen; DP, dissolved phosphorus; COD, 

chemical oxygen demand; LOAD, storm-runoff load, in pounds; CONC, storm-runoff mean 

concentration, in milligrams per liter (except for PB which is in micrograms per liter), SS, 

suspended solids; TN, total nitrogen; and PB, total recoverable lead]

Simple estimator: Calibration error:

Constituent name. mean of observed values standard deviation

model type (pounds) (pounds)

TKN.LOAD 8.51 7.58 

DP.LOAD .915 .66

COD.CONC

SS.CONC

TN.CONC

TKN.CONC

PB.CONC

78

208

2.46

1.8

20

47

248

1.68

1.5

16

For the concentration models TP, DP, CU, and ZN, much of the variation in O is explained by the 

regional models. Of these models, the direction of bias of Pu relative to O is not consistent for TP and DP, 

thereby validating the unadjusted regional models. For CU and ZN, the direction of bias of Pu relative to O 

is consistent and positive; therefore, MAP-R-P can be used to provide a more accurate estimate. For the 

remaining five constituents COD, SS, TN, TKN, and PB, the regional models do not explain much of the 

variation in O, thus neither the unadjusted regional models nor the MAP-R-P is appropriate. A simple 

estimator such as the mean of the observed concentration values (table 5) may be used, or additional data 

may be collected to calibrate a local model.
Calibration and Error Analysis

Observations in the Little Rock data base were used to derive coefficients for the MAP-R-P used 

with the appropriate constituent models (table 6). Calibration error is reported as standard error of the 

estimate (SE). SE measures how well the estimated values from the MAP-R-P agree with the observed 

values from the calibration data set. Calibration results may be biased because of the limited data set sizes 

in the Little Rock data base.

Table 6. -Calibration coefficients and error statistics for adjusted models for the Little Rock data base

[P0', regression coefficient that is the intercept in the regression model; P^, predicted value of 

response variable from the unadjusted regional model for unmonitored site and storm i; BCF, 

bias correction factor; r2, coefficient of determination, calculated using log-transformed observed 

and predicted values; SE, standard error of estimate; TN, total nitrogen; LOAD, storm-runoff 

load, in pounds; CONC, storm-runoff mean concentration, in milligrams per liter; CU, total 

recoverable copper; PB, total recoverable lead; ZN, total recoverable zinc; equation form is :

y = s ' x ppi. x BCF ] *o MI

Constituent 

name, 

model type

TN.LOAD

CU.LOAD

PB.LOAD

Calibration coefficients

IV

jQ-0.118

1Q-2.726

10-1.044

B! BCF

0.958 1.093

.700 1.464

1.268 1.627

Calibration error statistics

r2

0.588

.469

.641

SE,log

0.197

.415

.432

SE, percent

48

122

130

CU.CONC 

ZN.CONC

10.;n 

10"403

.408 

1.016

1.124 

1.131

.346

.577

.215 

.238

53 

59

Standard error of estimate for the MAP-R-P's ranges from 0.197 log units (48 percent) for the TN 

load model to 0.432 log units (130 percent) for the PB load model. The relatively large values of SE for 

some of the adjusted models, although representing significant reduction (at least 50 percent) in prediction 

error compared to estimation with Pu alone, may be unacceptable for some applications. The user may

need to collect additional local data for these constituents and repeat the model adjustment procedure 

analysis or calibrate an independent local regression model.

Standard error of estimate for the adjusted CU load model (122 percent) is larger than the SE for the 

adjusted CU concentration model (53 percent). This disparity should not encourage the user to use an 

estimate from the adjusted CU concentration model, in conjunction with an estimated runoff volume, to 

estimate CU load. SE values may be larger for load models because the variation in load values is naturally 

greater, which is caused by the greater variability in values of runoff volume.
Example Application

In an example application, an engineer in Little Rock, Arkansas, needs to estimate a storm-runoff 

load for CU for an unmonitored site where DA is 0.50 square mile, LUI is 75 percent, LUC is 20 percent, 

LUN is 5 percent, and storm i where TRN is 1.10 inches. UNIT for the Little Rock area is 4.1 inches. Using the 

CU load model for region III (table 2), the engineer calculates the predicted value (P^ for the unmonitored 

site and storm i from the unadjusted regional model as follows:

Pu .(CU) = 4.508 X (1.10) (0-896) X (0.50) ^^ X (76) ( °'648) X (21) X ( 7 ) ( °'328) X (4.1) ( 2'°?^ X (2.149)

Pui (CU) = 7.03 pounds.

Before adjusting the estimate using MAP-R-P, the engineer needs to first consider whether the 

characteristics of unmonitored site and storm i are within the range of site and storm characteristics in the 

Little Rock data base (table 3). In this example, values for unmonitored site and storm i are within the 

range of the data base.

Using the MAP-R-P for the CU load model (table 6), the engineer calculates the adjusted predicted 

value (Pj^) as follows:

i-o 70R\ (0 700) 

Pai (CU) = 10* *"*' X (7.03) X 1.464

Pai (CU) = 0.011 pound.

The city engineer can estimate annual and seasonal urban-runoff load at the unmonitored site i by 

calculating P^ for a recorded series of storms producing a synthetic record of storm loads. The estimated 

mean annual load can be determined from the synthetic record by dividing the sum of loads from each 

storm by the number of years in the period of synthetic record. The estimated mean seasonal load can be 

determined by dividing the sum of loads from storms only in the particular season by the number of years 

in the period of synthetic record.

Mean seasonal load also can be estimated by calculating P^ for a single storm representing average 

seasonal conditions for TRN, then multiplying P^ (the average seasonal storm load) by the average 

number of storms per season (Driver and Tasker, 1990). The mean annual load also can be estimated by 

summing the mean seasonal loads.

10
SUMMARY

Storm-runoff has been determined to be a major source of nonpoint-source pollution in metropolitan 

areas. Urban water-quality managers need data on storm-runoff loads from representative watersheds in 

their city to design remedial programs. Verification statistics and calibration error statistics for regression 

models used to estimate storm-runoff loads and mean concentrations for the Little Rock area are presented 

in this report. Data collected at 5 representative sites during 22 storms from June 1992 through January 

1994 compose the Little Rock, Arkansas data base.

Comparison of observed values of storm-runoff load and mean concentrations to the predicted 

values from the regional regression models shows large prediction errors for almost all constituent 

models, ranging from 63 percent to over several thousand percent. The root mean square errors for COD, 

TN, TP load models and COD, TN, and TKN concentration models are less than 100 percent, and can be 

considered reasonable for water-quality models.

Differences between observed values (O) and predicted values (Pu) are caused by variability in the 

Little Rock data base or by error in the regional models. For most of the constituents, the prediction error is 

too large to be explained reasonably by variability in the data alone. Some of the prediction error is 

probably a result of error in the regional models. Where it was applicable, a model adjustment procedure 

(MAP-R-P) based upon a regression with O against Pu, was applied to improve predictive accuracy

For the load models COD, SS, TP, and ZN, much of the variation in O is explained by the regional 

models and the direction of bias of Pu relative to O is not consistent, thereby validating the unadjusted 

regional model. For TN, CU, and PB, the direction of bias of Pu relative to O is consistent and positive; that 

is the regional models consistently overestimate O; therefore, MAP-R-P can be used to provide a better 

estimate. For the constituents TKN and DP, the regional models do not explain much of the variation in O, 

thus neither the unadjusted regional models nor the MAP-R-P is appropriate. A simple estimator, such as 

the mean of the observed load values, may be used.

For the concentration models TP and DP, much of the variation in O is explained by the regional 

models and the direction of bias of Pu relative to O is not consistent, thereby validating the unadjusted 

regional models. For CU and ZN, the direction of bias of Pu relative to O is consistent and positive; 

therefore, MAP-R-P can be used to provide a better estimate. For the remaining five constituents, COD, SS, 

TN, TKN, and PB, the regional models do not explain much of the variation in O, thus neither the 

unadjusted regional models nor the MAP-R-P is appropriate. A simple estimator, such as the mean of the 

observed concentration values, may be used.

Standard error of estimate for the adjusted models ranges from 48 percent to 130 percent. 

Calibration results may be biased because of the limited data set sizes in the Little Rock data base. The 

relatively large values of SE for some of the constituent models may be unacceptable for some 

applications. The user may need to collect additional local data and repeat the model adjustment 

procedure analysis or calibrate an independent local regression model.

11
REFERENCES

Driver, N.E., and Tasker, G.D., 1990, Techniques for estimation of storm-runoff loads, volumes, and 

selected constituent concentrations in urban watersheds in the United States: U.S. Geological Survey 

Water-Supply Paper 2363,44 p.

Hershfield, D.M., 1961, Rainfall frequency atlas of the United States for durations from 30 minutes to 24 

hours and return periods from 1 to 100 years: U.S. Weather Bureau Technical Paper No. 40,115 p.

Hoos, A.B., and Sisolak, J.D., 1993, Procedures for adjusting regional regression models of urban-runoff 

quality using local data: U.S. Geological Survey Open-File Report 93-039,39 p.

Plebuch, R.O., and Mines, M.S., 1967, Water resources of Pulaski and Saline Counties, Arkansas: US. 

Geological Survey Water-Supply Paper 1839-B, 25 p.

U.S. Environmental Protection Agency, 1990, National pollutant discharge elimination system permit 

application regulations for storm water discharges: U.S. Federal Register, v. 55, no. 222, p. 47990- 

48091.

12
APPENDIX

WATER-QUALITY DATA COLLECTED 

IN LITTLE ROCK, ARKANSAS

1-1
ABBREVIATIONS

AC-FT

COLS./100ML

Deg.C

K

MG/L

REC

UG/L

UM-MF

UNF

US/CM

WAT

WH

Acre-feet

Number of colonies per 100 milliliters

Degrees Celsius

Non-ideal count

Milligrams per liter

Recoverable

Micrograms per liter

Micrometer membrane filter

Unfiltered

Microsiemens per centimeter

Water

Whole water

Less than

No data available

1-2
07263453 - CAMMACK VILLAGE AREA STORMWATER DRAIN AT LITTLE ROCK 

WATER-QUALITY DATA

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

AGENCY

COLLECTING

SAMPLE

(CODE

NUMBER)

(00027)

80513

80513

80513

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

(00925)

0.88

0.74

1.0

SOLIDS,

DISSOLVED

(TONS

PER

AC-FT)

(70303)

0.05

0.05

0.06

PHOSPHORUS

DISSOLVED

(MG/L

AS P)

(00666)

0.150

0.040

0.080

NICKEL,

TOTAL

RECOVERABLE

(UG/L

AS NI)

(01067)

9

13

3

AGENCY

ANALYZING

SAMPLE

(CODE

NUMBER)

(00028)

80020

80020

80020

SODIUM,

DISSOLVED

(MG/L

AS NA)

(00930)

1.9

1.4

3.1

RESIDUE

TOTAL

AT 105

DEC. C,

SUSPENDED

(MG/L)

(00530)

502

520

32

CARBON,

ORGANIC

TOTAL

(MG/L

AS C)

(00680)

47

26

16

SELENIUM,

TOTAL

(UG/L

AS SE)

(01147)

<2

<1

<1

SPECIFIC

CONDUCTANCE

LAB

(US/CM)

(90095)

45

37

48

SODIUM

ADSORPTION

RATIO

(00931)

0.3

0.2

0.4

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

(00613)

0.020

<0.010

<0.010

ARSENIC

TOTAL

(UG/L

AS AS)

(01002)

7

3

<1

SILVER,

TOTAL

RECOVERABLE

(UG/L

AS AG)

(01077)

<1

<1

<1

PH

WATER

WHOLE

LAB

(STANDARD

UNITS)

(00403)

6.2

5.8

7.5

SODIUM

PERCENT

(00932)

23

21

32

NITROGEN,

N02+N03

DISSOLVED

(MG/L

AS N)

(00631)

0.690

0.340

0.920

BERYLLIUM,

TOTAL

RECOVERABLE

(UG/L

AS BE)

(01012)

<10

<10

<10

ZINC,

TOTAL

RECOVERABLE

(UG/L

AS ZN)

(01092)

80

70

20

OXYGEN

DEMAND,

BIOCHEMICAL,

5 DAY

(MG/L)

(00310)

16

2.3

15

POTASSIUM,

DISSOLVED

(MG/L

AS K)

(00935)

2.3

1.8

1.7

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

(00608)

0.250

0.040

0.030

CADMIUM

TOTAL

RECOVERABLE

(UG/L

AS CD)

(01027)

<1

<1

<1

CYANIDE

TOTAL

(MG/L

AS CN)

(00720)

<0.010

<0.010

<0.010

OXYGEN

DEMAND,

CHEMICAL

(HIGH

LEVEL)

(MG/L)

(00340)

150

96

54

ALKALINITY

LAB

(MG/L

AS

CAC03)

(90410)

6.9

11

11

NITROGEN,

ORGANIC

TOTAL

(MG/L

AS N)

(00605)

1.3

1.2

0.57

CHROMIUM,

TOTAL

RECOVERABLE

(UG/L

AS CR)

(01034)

4

10

1

DIBROMOMETHANE

WATER

WHOLE

RECOVER

(UG/L)

(30217)

<0.2

<0.2

<0.2

COLIFORM,

FECAL,

0.7

UM-MF

(COLS./

100 ML)

(31625)

K73000

K30000

32000

SULFATE

DISSOLVED

(MG/L

AS S04)

(00945)

4.0

3.0

4.3

NITROGEN,

TOTAL

(MG/L

AS N)

(00600)

2.3

1.5

1.5

COPPER,

TOTAL

RECOVERABLE

(UG/L

AS CU)

(01042)

10

11

3

DICHLOROBROMOMETHANE

TOTAL

(UG/L)

(32101)

<0.2

<0.2

<0.2

STREPTOCOCCI

FECAL,

KF AGAR

(COLS.

PER

100 ML)

(31673)

220000

260000

41000

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

(00940)

3.0

3.3

4.6

NITROGEN,

NITRATE

TOTAL

(MG/L

AS N)

(00620)

0.670

0.340

0.920

LEAD,

TOTAL

RECOVERABLE

(UG/L

AS PB)

(01051)

57

49

6

CARBONTETRACHLORIDE

TOTAL

(UG/L)

(32102)

<0.2

<0.2

<0.2

HARDNESS

TOTAL

(MG/L

AS

CAC03)

(00900)

11

9

12

SOLIDS,

RESIDUE

AT 180

DEC. C

DISSOLVED

(MG/L)

(70300)

38

35

47

NITROGEN, AMMONIA +

ORGANIC

TOTAL

(MG/L

AS N)

(00625)

1.6

1.2

0.60

THALLIUM,

TOTAL

(UG/L

AS TL)

(01059)

<5

<5

<5

1,2-DICHLOROETHANE

TOTAL

(UG/L)

(32103)

<0.2

<0.2

<0.2

CALCIUM

DISSOLVED

(MG/L

AS CA)

(00915)

2.8

2.4

3.3

SOLIDS,

SUM OF

CONSTITUENTS,

DISSOLVED

(MG/L)

(70301)

22

21

29

PHOSPHORUS

TOTAL

(MG/L

AS P)

(00665)

0.190

0.580

0.160

MERCURY

TOTAL

RECOVERABLE

(UG/L

AS HG)

(71900)

0.10

<0.10

<0.10

BROMOFORM

TOTAL

(UG/L)

(32104)

<0.2

<0.2

<0.2

1-3
07263453 - CAMMACK VILLAGE AREA STORMWATER DRAIN AT LITTLE ROCK continued 

WATER-QUALITY DATA

DATE

MAY

18

OCT

20

NOV

16

DATE

MAY

18

OCT

20

NOV

16

DATE

MAY

18

OCT

20

NOV

16

DATE

MAY

18

OCT

20

NOV

16

DATE

MAY

18

OCT

20

NOV

16

TIME

1993

. 1335

. 0519

. 1215

TIME

1993

. 1335

. 0519

. 1215

TIME

1993

. 1335

. 0519

. 1215

TIME

1993

. 1335

. 0519

. 1215

TIME

1993

. 1335

. 0519

. 1215

CHLORODIBROMOMETHANE

TOTAL

(UG/L)

(32105)

<0.2

<0.2

<0.2

BENZO B

FLUORANTHENE

TOTAL

(UG/L)

(34230)

<10.0

<10.0

<10.0

CHRYSENE

TOTAL

(UG/L)

(34320)

<10.0

<10.0

<10.0

HEXACHLOROCYCLOPENTADIENE

TOTAL

(UG/L)

(34386)

<5.0

<5.0

<5.0

NITROBENZENE

TOTAL

(UG/L)

(34447)

<5.0

<5.0

<5.0

CHLOROFORM

TOTAL

(UG/L)

(32106)

<0.2

<0.2

<0.2

BENZO K

FLUORANTHENE

TOTAL

(UG/L)

(34242)

<10.0

<10.0

<10.0

DIETHYL

PHTHALATE

TOTAL

(UG/L)

(34336)

<5.0

<5.0

<5.0

HEXACHLOROETHANE

TOTAL

(UG/L)

(34396)

<5.0

<5.0

<5.0

PARACHLOROMETA

CRESOL

TOTAL

(UG/L)

(34452)

<30.0

<30.0

<30.0

PHENOLS

TOTAL

(UG/L)

(32730)

4

<1

4

BENZOAPYRENE

TOTAL

(UG/L)

(34247)

<10.0

<10.0

<10.0

DIMETHYL

PHTHALATE

TOTAL

(UG/L)

(34341)

<5.0

<5.0

<5.0

INDENO

(1,2,3-

CD)

PYRENE

TOTAL

(UG/L)

(34403)

<10.0

<10.0

<10.0

PHENANTHRENE

TOTAL

(UG/L)

(34461)

<5.0

<5.0

<5.0

TOLUENE

TOTAL

(UG/L)

(34010)

<0.2

<0.2

<0.2

DELTA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(34259)

<0.09

<0.09

<0.09

ENDOSULFAN

SULFATE

TOTAL

(UG/L)

(34351)

<0.60

<0.60

<0.60

ISOP HO RONE

TOTAL

(UG/L)

(34408)

<5.0

<5.0

<5.0

PYRENE

TOTAL

(UG/L)

(34469)

<5.0

<5.0

<5.0

BENZENE

TOTAL

(UG/L)

(34030)

<0.2

<0.2

<0.2

BIS

2-

CHLOROETHYL

ETHER

TOTAL

(UG/L)

(34273)

<5.0

<5.0

<5.0

ENDOSULFAN

BETA

TOTAL

(UG/L)

(34356)

<0.04

<0.04

<0.04

METHYLBROMIDE

TOTAL

(UG/L)

(34413)

<0.2

<0.2

<0.2

TETRACHLOROETHYLENE

TOTAL

(UG/L)

(34475)

<0.2

<0.2

<0.2

ACENAPHTHYLENE

TOTAL

(UG/L)

(34200)

<5.0

<5.0

<5.0

BIS

(2-

CHLOROETHOXY)

METHANE

TOTAL

(UG/L)

(34278)

<5.0

<5.0

<5.0

ENDOSULFAN-I

WATER

WHOLE

REC

(UG/L)

(34361)

<0.10

<0.10

<0.10

METHYLCHLORIDE

TOTAL

(UG/L)

(34418)

<0.2

<0.2

<0.2

TRICHLOROFLUOROMETHANE

TOTAL

(UG/L)

(34488)

<0.2

<0.2

<0.2

ACENAPHTHENE

TOTAL

(UG/L)

(34205)

<5.0

<5.0

<5.0

BIS (2-

CHLOROISOPROPYL)

ETHER

TOTAL

(UG/L)

(34283)

<5.0

<5.0

<5.0

ENDRIN

ALDEHYDE

TOTAL

(UG/L)

(34366)

<0.20

<0.20

<0.20

METHYLENE

CHLORIDETOTAL

(UG/L)

(34423)

<0.2

<0.2

<0.2

1,1-DICHLOROETHANE

TOTAL

(UG/L)

(34496)

<0.2

<0.2

<0.2

ACROLEIN

TOTAL

(UG/L)

(34210)

<20

<20

<20

N-BUTYL

BENZYL

PHTHALATE

TOTAL

(UG/L)

(34292)

<5.0

<5.0

<5.0

ETHYLBENZENE

TOTAL

(UG/L)

(34371)

<0.2

<0.2

<0.2

NNITROSODI-NPROPYLAMINE

TOTAL

(UG/L)

(34428)

<5.0

<5.0

<5.0

1,1-DICHLOROETHYLENE

TOTAL

(UG/L)

(34501)

<0.2

<0.2

<0.2

ACRYLONITRILE

TOTAL

(UG/L)

(34215)

<20

<20

<20

CHLOROBENZENE

TOTAL

(UG/L)

(34301)

<0.20

<0.20

<0.20

FLUORANTHENE

TOTAL

(UG/L)

(34376)

<5.0

<5.0

<5.0

N-NITRO

-SODIPHENYLAMINE

TOTAL

(UG/L)

(34433)

<5.0

<5.0

<5.0

1/1/1-

TRICHLOROETHANE

TOTAL

(UG/L)

(34506)

<0.2

<0.2

<0.2

ANTHRACENE

TOTAL

(UG/L)

(34220)

<5.0

<5.0

<5.0

CHLOROETHANE

TOTAL

(UG/L)

(34311)

<0.2

<0.2

<0.2

FLUORENE

TOTAL

(UG/L)

(34381)

<5.0

<5.0

<5.0

N-NITRO

-SODIMETHYLAMINE

TOTAL

(UG/L)

(34438)

<5.0

<5.0

<5.0

1,1,2-

TRICHLOROETHANE

TOTAL

(UG/L)

(34511)

<0.2

<0.2

<0.2

1-4
07263453 - CAMMACK VILLAGE AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE

MAY

18

OCT

20

NOV

16

DATE

MAY

18

OCT

20

NOV

16

DATE

MAY

18

OCT

20

NOV

16

DATE

TIME

1993

. 1335

. 0519

. 1215

TIME

1993

. 1335

. 0519

. 1215

TIME

1993

. 1335

. 0519

. 1215

TIME

ETHANE,

1,1,2,2

TETRACHLOROWAT UNF

REC

(UG/L)

(34516)

<0.2

<0.2

<0.2

2-

CHLOROETHYLVINYLETHER

TOTAL

(UG/L)

(34576)

<1.0

<1.0

<1.0

2, 6-DINITROTOLUENE

TOTAL

(UG/L)

(34626)

<5.0

<5.0

<5.0

CIS

1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34704)

BENZOGH

I PERYL

ENE1,12

-BENZOP

ERYLENE

TOTAL

(UG/L)

(34521)

<10.0

<10.0

<10.0

2-

CHLORONAPHTHALENE

TOTAL

(UG/L)

(34581)

<5.0

<5.0

<5.0

3,3'-

DICHLOROBENZIDINE

TOTAL

(UG/L)

(34631)

<20.0

<20.0

<20.0

PENTACHLOROPHENOL

TOTAL

(UG/L)

(39032)

BENZO A

ANTHRAC

ENE1,2-

BENZANT

HRACENE

TOTAL

(UG/L)

(34526)

<10.0

<10.0

<10.0

2-

CHLOROPHENOL

TOTAL

(UG/L)

(34586)

<5.0

<5.0

<5.0

4-

BROMOPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34636)

<5.0

<5.0

<5.0

CHLORDANE

CIS

WATER

WHOLE

TOTAL

(UG/L)

(39062)

BENZENE

0-

CHLOROWATER

UNFLTRD

REC

(UG/L)

(34536)

<5.0

<5.0

<5.0

2-

NITROPHENOL

TOTAL

(UG/L)

(34591)

<5.0

<5.0

<5.0

4-

CHLOROPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34641)

<5.0

<5.0

<5.0

CHLORDANE

TRANS

WATER

WHOLE

TOTAL

(UG/L)

(39065)

1,2-DICHLOROPROPANE

TOTAL

(UG/L)

(34541)

<0.2

<0.2

<0.2

DI-NOCTYL

PHTHALATE

TOTAL

(UG/L)

(34596)

<10.0

<10.0

<10.0

4-

NITROPHENOL

TOTAL

(UG/L)

(34646)

<30.0

<30.0

<30.0

BIS (2-

ETHYL

HEXYL)

PHTHALATE

TOTAL

(UG/L)

(39100)

1,2-

TRANSDI

CHLOROETHENE

TOTAL

(UG/L)

(34546)

<0.2

<0.2

<0.2

2,4-DICHLOROPHENOL

TOTAL

(UG/L)

(34601)

<5.0

<5.0

<5.0

4,6-

DINITRO

-ORTHOCRESOL

TOTAL

(UG/L)

(34657)

<30.0

<30.0

<30.0

DI-NBUTYL

PHT HALATE

TOTAL

(UG/L)

(39110)

BENZENE

1,2,4-

TRICHLOROWAT UNF

REC

(UG/L)

(34551)

<5.0

<5.0

<5.0

2,4-DIMETHYLPHENOL

TOTAL

(UG/L)

(34606)

<5.0

<5.0

<5.0

DICHLORODIFLUOROMETHANE

TOTAL

(UG/L)

(34668)

<0.2

<0.2

<0.2

BENZIDINE

TOTAL

(UG/L)

(39120)

1,2,5,6

-DIBENZ

-ANTHRA

-CENE

TOTAL

(UG/L)

(34556)

<10.0

<10.0

<10.0

2,4-DINITROTOLUENE

TOTAL

(UG/L)

(34611)

<5.0

<5.0

<5.0

PHENOL

(C6H50H)

TOTAL

(UG/L)

(34694)

<5.0

<5.0

<5.0

VINYL

CHLORIDE

TOTAL

(UG/L)

(39175)

BENZENE

1,3-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34566)

<5.0

<5.0

<5.0

2,4,-

DINITROPHENOL

TOTAL

(UG/L)

(34616)

<20.0

<20.0

<20.0

NAPHTHALENE

TOTAL

(UG/L)

(34696)

<5.0

<5.0

<5.0

TRICHLOROETHYLENE

TOTAL

(UG/L)

(39180)

BENZENE

1,4-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34571)

<5.0

<5.0

<5.0

2,4,6-

TRICHLOROPHENOL

TOTAL

(UG/L)

(34621)

<20.0

<20.0

<20.0

TRANS1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34699)

<0.2

<0.2

<0.2

P,P'

DOT,

TOTAL

(UG/L)

(39300)

MAY 1993

18

OCT

. 1335

20. 0519

NOV

16. 1215

DATE TIME

<0.2

<0.2

<0.2

P,P'

ODD,

TOTAL

(UG/L)

(39310)

<30.0

<30.0

<30.0

P,P'

DDE,

TOTAL

(UG/L)

(39320)

<0.10

<0.10

<0.10

ALDRIN,

TOTAL

(UG/L)

(39330)

<0.10

<0.10

<0.10

ALPHA

BHC

TOTAL

(UG/L)

(39337)

<5.0

<5.0

<5.0

BETA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(39338)

<5.0

<5.0

<5.0

CHLORDANE,

TOTAL

(UG/L)

(39350)

<40.0

<40.0

<40.0

DIELDRIN

TOTAL

(UG/L)

(39380)

<0.2

<0.2

<0.2

ENDRIN

WATER

UNFLTRD

REC

(UG/L)

(39390)

<0.2

<0.2

<0.2

HEPTACHLOR,

TOTAL

(UG/L)

(39410)

<0.10

<0.10

<0.10

HEPTACHLOR

EPOXIDE

TOTAL

(UG/L)

(39420)

MAY 1993

18. 1335

OCT

20. 0519

NOV

16. 1215

<0.10

<0.10

<0.10

<0.04

<0.04

<0.04

<0.040

<0.040

<0.040

<0.03

<0.03

<0.03

<0.03

<0.03

<0.03

0.2

0.1

<0.1

<0.020

<0.020

<0.020

<0.060

<0.060

<0.060

<0.030

<0.030

<0.030

<0.80

<0.80

<0.80

1-5
07263453 - CAMMACK VILLAGE AREA STORMWATER DRAIN AT LITTLE ROCK continued 

WATER- QUALITY DATA

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

DATE TIME

MAY 1993

18. 1335 

OCT

20. 0519 

NOV

16. 1215

LINDANE

TOTAL

(UG/L)

(39340)

<0.030

<0.030

<0.030

HEXACHLOROBUTADIENE

TOTAL

(UG/L)

(39702)

<5.0

<5.0

<5.0

0-

CHLOROTOLUENE

WATER

WHOLE

TOTAL

(UG/L)

(77275)

<0.2

<0.2

<0.2

1,2-

DIBROMO

ETHANE

WATER

WHOLE

TOTAL

(UG/L)

(77651)

<0.2

<0.2

<0.2

TOXAPHENE,

TOTAL

(UG/L)

(39400)

<2

<2

<2

CIS-1,2

-DICHLOROETHENE

WATER

TOTAL

(UG/L)

(77093)

<0.2

<0.2

<0.2

TOLUENE

P-CHLOR

WATER

UNFLTRD

REC

(UG/L)

(77277)

<0.20

<0.20

<0.20

FREON113

WATER

UNFLTRD

REC

(UG/L)

(77652)

<0.5

<0.5

<0.5

AROCLOR

1016

PCB

TOTAL

(UG/L)

(34671)

<0.1

<0.1

<0.1

STYRENE

TOTAL

(UG/L)

(77128)

<0.2

<0.2

<0.2

METHANE

BROMO

CHLOROWAT

UNFLTRD

REC

(UG/L)

(77297)

<0.20

<0.20

<0.20

METHYL

ETHER

TERTBUTYL

WAT UNF

REC

(UG/L)

(78032)

<1.0

<1.0

<1.0

AROCLOR

1221

PCB

TOTAL

(UG/L)

(39488)

<1.0

<1.0

<1.0

1,1-DI

CHLOROPROPENE,

WAT, WH

TOTAL

(UG/L)

(77168)

<0.2

<0.2

<0.2

BENZENE

N-BUTYL

WATER

UNFLTRD

REC

(UG/L)

(77342)

<0.20

<0.20

<0.20

XYLENE

WATER

UNFLTRD

REC

(UG/L)

(81551)

<0.20

<0.20

<0.20

AROCLOR

1232

PCB

TOTAL

(UG/L)

(39492)

<0.1

<0.1

<0. 1

2,2-DI

CHLOROPROPANE

WAT, WH

TOTAL

(UG/L)

(77170)

<0.2

<0.2

<0.2

BENZENE

SEC

BUTYLWATER

UNFLTRD

REC

(UG/L)

(77350)

<0.20

<0.20

<0.20

BROMOBENZENE

WATER,

WHOLE,

TOTAL

(UG/L)

(81555)

<0.2

<0.2

<0.2

AROCLOR

1242

PCB

TOTAL

(UG/L)

(39496)

<0.1

<0.1

<0.1

1,3-DICHLOROPROPANE

WAT. WH

TOTAL

(UG/L)

(77173)

<0.2

<0.2

<0.2

BENZENE

TERTBUTYLWATER

UNFLTRD

REC

(UG/L)

(77353)

<0.20

<0.20

<0.20

DIBROMO

CHLOROPROPANE

WATER

WHOLE

TOT . REC

(UG/L)

(82625)

<1.0

<1.0

<1.0

AROCLOR

1248

PCB

TOTAL

(UG/L)

(39500)

<0.1

<0.1

<0.1

PSEUDOCUMENE

WATER

UNFLTRD

REC

(UG/L)

(77222)

<0.20

<0.20

<0.20

P-ISOPROPYLTOLUENE

WATER

WHOLE

REC

(UG/L)

(77356)

<0.20

<0.20

<0.20

1,2-DIPHENYLHYDRAZINE

WATER

TOT. REC

(UG/L)

(82626)

<5.0

<5.0

<5.0

AROCLOR

1254

PCB

TOTAL

(UG/L)

(39504)

<0.1

<0.1

<0.1

ISOPROPYLBENZENE

WATER

WHOLE

REC

(UG/L)

(77223)

<0.20

<0.20

<0.20

123-TRI

CHLOROPROPANE

WATER

WHOLE

TOTAL

(UG/L)

(77443)

<0.2

<0.2

<0.2

OIL AND

GREASE,

TOTAL

RECOV.

GRAVIMETRIC

(MG/L)

(00556)

<1

<1

<1

AROCLOR

1260

PCB

TOTAL

(UG/L)

(39508)

<0.1

<0.1

<0.1

BENZENE

N-PROPY

WATER

UNFLTRD

REC

(UG/L)

(77224)

<0.20

<0.20

<0.20

ETHANE,

1112-

TETRACHLOROWAT UNF

REC

(UG/L)

(77562)

<0.2

<0.2

<0.2

HEXACHLOROBENZENE

TOTAL

(UG/L)

(39700)

<5.0

<5.0

<5.0

MESITYLENE

WATER

UNFLTRD

REC

(UG/L)

(77226)

<0.20

<0.20

<0.20

1,2,3-

TRICHLORO

BENZENE

WAT, WH

REC

(UG/L)

(77613)

<0.20

<0.20

<0.20

1-6
07263559 - PARKWAY PLACE AREA STORMWATER DRAIN AT LITTLE ROCK 

WATER-QUALITY DATA

DATE

JULY

15.

AUG

05.

NOV

12.

TIME

1992

1655

0612

0330

AGENCY

COLLECTING

SAMPLE

(CODE

NUMBER)

(00027)

80513

80513

80513

AGENCY

ANALYZING

SAMPLE

(CODE

NUMBER)

(00028)

80020

80020

80020

SPECIFIC

CONDUCTANCE

LAB

(US/CM)

(90095)

53

42

39

PH

WATER

WHOLE

LAB

(STANDARD

UNITS)

(00403)

6.8

6.3

7.2

OXYGEN

DEMAND,

BIOCHEMICAL,

5 DAY

(MG/L)

(00310)

14

11

3.9

OXYGEN

DEMAND,

CHEMICAL

(HIGH

LEVEL)

(MG/L)

(00340)

40

39

140

COLIFORM,

FECAL,

0.7

UM-MF

(COLS./

100 ML)

(31625)

>60000

510000

K90000

STREPTOCOCCI

FECAL,

KF AGAR

(COLS.

PER

100 ML)

(31673)

>100000

800000

490000

HARDNESS

TOTAL

(MG/L

AS

CAC03 )

(00900)

10

10

8

CALCIUM

DISSOLVED

(MG/L

AS CA)

(00915)

2.6

3.0

2.1

APR 1993

25.

MAY

18.

DATE

JULY

15.

AUG

05.

NOV

12.

0810

1342

TIME

1992

1655

0612

0330

80513

80513

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

(00925)

0.80

0.71

0.63

80020

80020

SODIUM,

DISSOLVED

(MG/L

AS NA)

(00930)

1.2

1.4

1.2

43

56

SODIUM

ADSORPTION

RATIO

(00931}

0.2

0.2

0.2

5.9

6.1

SODIUM

PERCENT

(00932)

14

18

17

27

16

POTASSIUM,

DISSOLVED

(MG/L

AS K)

(00935)

5.2

2.7

3.9

110

48

ALKALINITY

LAB

(MG/L

AS

CAC03)

(90410)

2.9

7.9

7.9

>60000

K95000

SULFATE

DISSOLVED

(MG/L

AS S04)

(00945)

2.7

2.9

2.5

>100000

K260000

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

(00940)

2.7

1.2

1.9

10

13

SOLIDS,

RESIDUE

AT 180

DEC. C

DISSOLVED

(MG/L)

(70300)

35

30

25

2.8

3.5

SOLIDS,

SUM OF

CONSTITUENTS,

DISSOLVED

(MG/L)

(70301)

17

17

17

APR 1993

25.

MAY

18.

DATE

JULY

15.

AUG

05.

NOV

12.

0810

1342

TIME

1992

1655

0612

0330

0.75

1.0

SOLIDS,

DISSOLVED

(TONS

PER

AC-FT)

(70303)

0.05

0.04

0.03

2.5

1.2

RESIDUE

TOTAL

AT 105

DEC. C,

SUSPENDED

(MG/L)

(00530)

85

69

100

0.3

0.1

NITROGEN,

NITRITE

TOTAL

(MG/L

AS N)

(00615)

0.030

0.040

0.030

28

12

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

(00613)

2.9

4.3

NITROGEN,

N02+N03

TOTAL

(MG/L

AS N)

(00630)

1.40

0.850

0.750

20

2.6

NITROGEN,

N02+N03

DISSOLVED

(MG/L

AS N)

(00631)

2.5

6.1

NITROGEN,

AMMONIA

TOTAL

(MG/L

AS N)

(00610)

0.730

0.320

0.150

1.9

2.9

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

(00608)

39

42

NITROGEN,

AMMONIA

TOTAL

(MG/L

AS NH4)

(71845)

0.94

0.41

0.19

33

27

NITROGEN,

ORGANIC

TOTAL

(MG/L

AS N)

(00605)

1.3

1.1

0.95

APR 1993

25.

MAY

18.

DATE

JULY

15.

AUG

05.

NOV

12.

0810

1342

TIME

1992

1655

0612

0330

0.05

0.06

NITROGEN,

TOTAL

(MG/L

AS N)

(00600)

3.4

2.3

1.8

950

69

NITROGEN,

TOTAL

(MG/L

AS N03)

(71887)

15

10

8.2

NITROGEN,

NITRATE

TOTAL

(MG/L

AS N)

(00620}

1.37

0.810

0.720

0.020

0.020

NITROGEN, AMMONIA +

ORGANIC

TOTAL

(MG/L

AS N)

(00625)

2.0

1.4

1.1

PHOSPHORUS

TOTAL

(MG/L

AS P)

(00665)

0.670

0.530

0.520

1.70

1.30

PHOSPHORUS

DISSOLVED

(MG/L

AS P)

(00666)

0.690

0.370

0.350

CARBON,

ORGANIC

TOTAL

(MG/L

AS C)

(00680)

14

12

15

0.460

0.900

ARSENIC

TOTAL

(UG/L

AS AS)

(01002)

10

7

7

BERYLLIUM,

TOTAL

RECOVERABLE

(UG/L

AS BE)

(01012)

<10

<10

<10

1.7

1.7

CADMIUM

TOTAL

RECOVERABLE

(UG/L

AS CD)

(01027)

<1

<1

<1

APR 1993

25.

MAY

18.

0810

1342

3.9

3.9

1.68

1.28

2.2

2.6

0.460

0.590

0.400

0.480

34

23

8

6

<10

<10

<1

<1

1-7
07263559 - PARKWAY PLACE AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

CHROMIUM,

TOTAL

RECOVERABLE

(UG/L

AS CR)

(01034)

COPPER,

TOTAL

RECOVERABLE

(UG/L

AS CU)

(01042)

LEAD,

TOTAL

RECOVERABLE

(UG/L

AS PB)

(01051)

THALLIUM,

TOTAL

(UG/L

AS TL)

(01059)

MERCURY

TOTAL

RECOVERABLE

(UG/L

AS HG)

(71900)

NICKEL,

TOTAL

RECOVERABLE

(UG/L

AS NI)

(01067)

SELENIUM,

TOTAL

(UG/L

AS SE)

(01147)

SILVER,

TOTAL

RECOVERABLE

(UG/L

AS AG)

(01077)

ZINC,

TOTAL

RECOVERABLE

(UG/L

AS ZN)

(01092)

CYANIDE

TOTAL

(MG/L

AS CN)

(00720)

JULY 1992

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

<1

1

2

20

2

DIBROMOMETHANE

WATER

WHOLE

RECOVER

(UG/L)

(30217)

<0.2

<0.2

<0.2

<0.2

<0.2

ACENAPHTHYLENE

TOTAL

(UG/L)

(34200)

<5.0

<5.0

<5.0

<5.0

<5.0

BIS

(2-

CHLOROETHOXY)

METHANE

TOTAL

(UG/L)

(34278)

<5.0

<5.0

<5.0

<5.0

<5.0

3

3

3

6

2

DICHLOROBROMOMETHANE

TOTAL

(UG/L)

(32101)

<0.2

<0.2

<0.2

<0.2

<0.2

ACENAP HTHENE

TOTAL

(UG/L)

(34205)

<5.0

<5.0

<5.0

<5.0

<5.0

BIS (2-

CHLOROISOPROPYL)

ETHER

TOTAL

(UG/L)

(34283)

<5.0

<5.0

<5.0

<5.0

<5.0

2

3

3

7

2

CARBONTETRACHLORIDE

TOTAL

(UG/L)

(32102)

<0.2

<0.2

<0.2

<0.2

<0.2

ACROLEIN

TOTAL

(UG/L)

(34210)

<20

<20

<20

<20

<20

N-BUTYL

BENZYL

PHTHALATE

TOTAL

(UG/L)

(34292)

<5.0

<5.0

<5.0

<5.0

<5.0

<5

<5

<5

<5

<5

1,2-DICHLOROETHANE

TOTAL

(UG/L)

(32103)

<0.2

<0.2

<0.2

<0.2

<0.2

ACRYLONITRILE

TOTAL

(UG/L)

(34215)

<20

<20

<20

<20

<20

CHLOROBENZENE

TOTAL

(UG/L)

(34301)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.10

<0.10

0.10

0.10

0.10

BROMOFORM

TOTAL

(UG/L)

(32104)

<0.2

<0.2

<0.2

<0.2

<0.2

ANTHRACENE

TOTAL

(UG/L)

(34220)

<5.0

<5.0

<5.0

<5.0

<5.0

CHLOROETHANE

TOTAL

(UG/L)

(34311)

<0.2

<0.2

<0.2

<0.2

<0.2

3

3

4

7

2

CHLORODIBROMOMETHANE

TOTAL

(UG/L)

(32105)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZO B

FLUORANTHENE

TOTAL

(UG/L)

(34230)

<10.0

<10.0

<10.0

<10.0

<10.0

CHRYSENE

TOTAL

(UG/L)

(34320)

<10.0

<10.0

<10.0

<10.0

<10.0

<2

1

<2

<2

<2

CHLOROFORM

TOTAL

(UG/L)

(32106)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZO K

FLUORANTHENE

TOTAL

(UG/L)

(34242)

<10.0

<10.0

<10.0

<10.0

<10.0

DIETHYL

PHTHALATE

TOTAL

(UG/L)

(34336)

<5.0

<5.0

<5.0

<5.0

<5.0

<1

<1

<1

<1

<1

PHENOLS

TOTAL

(UG/L)

(32730)

3

5

4

1

2

BENZOAPYRENE

TOTAL

(UG/L)

(34247)

<10.0

<10.0

<10.0

<10.0

<10.0

DIMETHYL

PHTHALATE

TOTAL

(UG/L)

(34341)

<5.0

<5.0

<5.0

<5.0

<5.0

20

10

30

50

30

TOLUENE

TOTAL

(UG/L)

(34010)

0.4

<0.2

<0.2

<0.2

<0.2

DELTA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(34259)

<0.09

<0.09

<0.09

<0.09

<0.09

ENDOSULFAN

SULFATE

TOTAL

(UG/L)

(34351)

<0.60

<0.60

<0.60

<0.60

<0.60

<0.010

<0.010

<0.010

<0.010

<0.010

BENZENE

TOTAL

(UG/L)

(34030)

<0.2

<0.2

<0.2

<0.2

<0.2

BIS

2-

CHLOROETHYL

ETHER

TOTAL

(UG/L)

(34273)

<5.0

<5.0

<5.0

<5.0

<5.0

ENDOSULFAN

BETA

TOTAL

(UG/L)

(34356)

<0.04

<0.04

<0.04

<0.04

<0.04

1-8
07263559 - PARKWAY PLACE AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

1342

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

. 0330

ENDOSULFANI

WATER

WHOLE

REC

(UG/L)

(34361)

<0.10

<0.10

<0.10

<0.10

<0.10

METHYLCHLORIDE

TOTAL

(UG/L)

(34418)

<0.2

<0.2

<0.2

<0.2

<0.2

TRICHLOROFLUOROMETHANE

TOTAL

(UG/L)

(34488)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-

TRANSDI

CHLOROETHENE

TOTAL

(UG/L)

(34546)

<0.2

<0.2

<0.2

ENDRIN

ALDEHYDE

TOTAL

(UG/L)

(34366)

<0.20

<0.20

<0.20

<0.20

<0.20

METHYLENE

CHLORIDE

TOTAL

(UG/L)

(34423)

<0.2

<0.2

<0.2

<0.2

<0.2

1,1-DICHLOROETHANE

TOTAL

(UG/L)

(34496)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,2,4-

TRICHLOROWAT UNF

REC

(UG/L)

(34551)

<5.0

<5.0

<5.0

ETHYLBENZENE

TOTAL

(UG/L)

(34371)

<0.2

<0.2

<0.2

<0.2

<0.2

NNITROSODI-NPROPYLAMINE

TOTAL

(UG/L)

(34428)

<5.0

<5.0

<5.0

<5.0

<5.0

1,1-DICHLOROETHYLENE

TOTAL

(UG/L)

(34501)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2,5,6

-DIBENZ

-ANTHRA

-CENE

TOTAL

(UG/L)

(34556)

<10.0

<10.0

<10.0

FLUORANTHENE

TOTAL

(UG/L)

(34376)

<5.0

<5.0

<5.0

<5.0

<5.0

N-NITRO

-SODIPHENYLAMINE

TOTAL

(UG/L)

(34433)

<5.0

<5.0

<5.0

<5.0

<5.0

1,1,1-

TRICHLOROETHANE

TOTAL

(UG/L)

(34506)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,3-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34566)

<5.0

<5.0

<5.0

FLUORENE

TOTAL

(UG/L)

(34381)

<5.0

<5.0

<5.0

<5.0

<5.0

N-NITRO

-SODIMETHYLAMINE

TOTAL

(UG/L)

(34438)

<5.0

<5.0

<5.0

<5.0

<5.0

1,1,2-

TRICHLOROE THANE

TOTAL

(UG/L)

(34511)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,4-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34571)

<5.0

<5.0

<5.0

HEXACHLOROCYCLOPENTADIENE

TOTAL

(UG/L)

(34386)

<5.0

<5.0

<5.0

<5.0

<5.0

NITROBENZENE

TOTAL

(UG/L)

(34447)

<5.0

<5.0

<5.0

<5.0

<5.0

ETHANE,

1,1,2,2

TETRACHLOROWAT UNF

REC

(UG/L)

(34516)

<0.2

<0.2

<0.2

<0.2

<0.2

2-

CHLOROETHYLVINYLETHER

TOTAL

(UG/L)

(34576)

<1.0

<1.0

<1.0

HEXACHLOROE THANE

TOTAL

(UG/L)

(34396)

<5.0

<5.0

<5.0

<5.0

<5.0

PARACHLOROMETA

CRESOL

TOTAL

(UG/L)

(34452)

<30.0

<30.0

<30.0

<30.0

<30.0

BENZOGH

I PERYL

ENE1,12

-BENZOP

ERYLENE

TOTAL

(UG/L)

(34521)

<10.0

<10.0

<10.0

<10.0

<10.0

2-

CHLORONAPHTHALENE

TOTAL

(UG/L)

(34581)

<5.0

<5.0

<5.0

INDENO

(1,2,3-

CD)

PYRENE

TOTAL

(UG/L)

(34403)

<10.0

<10.0

<10.0

<10.0

<10.0

PHENANTHRENE

TOTAL

(UG/L)

(34461)

<5.0

<5.0

<5.0

<5.0

<5.0

BENZO A

ANTHRAC

ENE1,2-

BENZANT

HRACENE

TOTAL

(UG/L)

(34526)

<10.0

<10.0

<10.0

<10.0

<10.0

2-

CHLOROPHENOL

TOTAL

(UG/L)

(34586)

<5.0

<5.0

<5.0

I SOPH ORONE

TOTAL

(UG/L)

(34408)

<5.0

<5.0

<5.0

<5.0

<5.0

PYRENE

TOTAL

(UG/L)

(34469)

<5.0

<5.0

<5.0

<5.0

<5.0

BENZENE

0-

CHLOROWATER

UNFLTRD

REC

(UG/L)

(34536)

<5.0

<5.0

<5.0

<5.0

<5.0

2-

NITROPHENOL

TOTAL

(UG/L)

(34591)

<5.0

<5.0

<5.0

METHYLBROMIDE

TOTAL

(UG/L)

(34413)

<0.2

<0.2

<0.2

<0.2

<0.2

TETRACHLOROETHYLENE

TOTAL

(UG/L)

(34475)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-DICHLOROPROPANE

TOTAL

(UG/L)

(34541)

<0.2

<0.2

<0.2

<0.2

<0.2

DI-NOCTYL

PHT HALATE

TOTAL

(UG/L)

(34596)

<10.0

<10.0

<10.0

APR 1993

25

MAY

18

. 0810

. 1342

<0.2

<0.2

<5.0

<5.0

<10.0

<10.0

<5.0

<5.0

<5.0

<5.0

<1.0

<1.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<10.0

<10.0

1-9
07263559 - PARKWAY PLACE AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE

JULY

15.

AUG

05.

NOV

12.

TIME

1992

1655

0612

0330

2,4-DICHLOROPHENOL

TOTAL

(UG/L)

(34601)

<5.0

<5.0

<5.0

2,4-DIMETHYLPHENOL

TOTAL

(UG/L)

(34606)

<5.0

<5.0

<5.0

2,4-DINITROTOLUENE

TOTAL

(UG/L)

(34611)

<5.0

<5.0

<5.0

2,4,-

DINITROPHENOL

TOTAL

(UG/L)

(34616)

<20.0

<20.0

<20.0

2,4,6-

TRICHLOROPHENOL

TOTAL

(UG/L)

(34621)

<20.0

<20.0

<20.0

2,6-DINITROTOLUENE

TOTAL

(UG/L)

(34626)

<5.0

<5.0

<5.0

3,3'-

DICHLOROBENZIDINE

TOTAL

(UG/L)

(34631)

<20.0

<20.0

<20.0

4-

BROMOPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34636)

<5.0

<5.0

<5.0

4-

CHLOROPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34641)

<5.0

<5.0

<5.0

4-

NITROPHENOL

TOTAL

(UG/L)

(34646)

<30.0

<30.0

<30.0

APR 1993

25.

MAY

18.

DATE

JULY

15.

AUG

05.

NOV

12.

0810

1342

TIME

1992

1655

0612

0330

<5.0

<5.0

4,6-

DINITRO

-ORTHOCRESOL

TOTAL

(UG/L)

(34657)

<30.0

<30.0

<30.0

<5.0

<5.0

DICHLORODIFLUOROMETHANE

TOTAL

(UG/L)

(34668)

<0.2

<0.2

<0.2

<5.0

<5.0

PHENOL

(C6H50H)

TOTAL

(UG/L)

(34694)

<5.0

<5.0

<5.0

<20.0

<20.0

NAPHTHALENE

TOTAL

(UG/L)

(34696)

<5.0

<5.0

<5.0

<20.0

<20.0

TRANS1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34699)

<0.2

<0.2

<0.2

<5.0

<5.0

CIS

1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34704)

<0.2

<0.2

<0.2

<20.0

<20.0

PENTACHLOROPHENOL

TOTAL

(UG/L)

(39032)

<30.0

<30.0

<30.0

<5.0

<5.0

CHLORDANE

CIS

WATER

WHOLE

TOTAL

(UG/L)

(39062)

<0.10

<0.10

<0.10

<5.0

<5.0

CHLORDANE

TRANS

WATER

WHOLE

TOTAL

(UG/L)

(39065)

<0.10

<0.10

<0.10

<30.0

<30.0

BIS (2-

ETHYL

HEXYL)

PHTHALATE

TOTAL

(UG/L)

(39100)

<5.0

<5.0

<5.0

APR 1993

25.

MAY

18.

DATE

JULY

15.

AUG

05.

NOV

12.

0810

1342

TIME

1992

1655

0612

0330

<30.0

<30.0

DI-NBUTYL

PHTHALATE

TOTAL

(UG/L)

(39110)

<5.0

<5.0

<5.0

<0.2

<0.2

BEN2IDINE

TOTAL

(UG/L)

(39120)

<40.0

<40.0

<40.0

<5.0

<5.0

VINYL

CHLORIDE

TOTAL

(UG/L)

(39175)

<0.2

<0.2

<0.2

<5.0

<5.0

TRICHLOROETHYLENE

TOTAL

(UG/L)

(39180)

<0.2

<0.2

<0.2

<0.2

<0.2

P,P'

DOT,

TOTAL

(UG/L)

(39300)

<0.10

<0.10

<0.10

<0.2

<0.2

P,P'

ODD,

TOTAL

(UG/L)

(39310)

<0.10

<0.10

<0.10

<30.0

<30.0

P,P'

DDE,

TOTAL

(UG/L)

(39320)

<0.04

<0.04

<0.04

<0.10

<0.10

ALDRIN,

TOTAL

(UG/L)

(39330)

<0.040

<0.040

<0.040

<0.10

<0.10

ALPHA

BHC

TOTAL

(UG/L)

(39337)

<0.03

<0.03

<0.03

<5.0

<5.0

BETA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(39338)

<0.03

<0.03

<0.03

APR 1993

25.

MAY

18.

DATE

JULY

15.

AUG

05.

NOV

12.

0810

1342

TIME

1992

1655

0612

0330

<5.0

<5.0

CHLORDANE,

TOTAL

(UG/L)

(39350)

<0.1

<0.1

<0.1

<40.0

<40.0

DIELDRIN

TOTAL

(UG/L)

(39380)

<0.020

<0.020

<0.020

<0.2

<0.2

ENDRIN

WATER

UNFLTRD

REC

(UG/L)

(39390)

<0.060

<0.060

<0.060

<0.2

<0.2

HEPTACHLOR,

TOTAL

(UG/L)

(39410)

<0.030

<0.030

<0.030

<0.10

<0.10

HEPTACHLOR

EPOXIDE

TOTAL

(UG/L)

(39420)

<0.80

<0.80

<0.80

<0.10

<0.10

<0.04

<0.04

<0.040

<0.040

AROCLOR

LINDANE

TOTAL

(UG/L)

(39340)

<0.030

<0.030

<0.030

TOXAPHENE,

TOTAL

(UG/L)

(39400)

<2

<2

<2

1016

PCB

TOTAL

(UG/L)

(34671)

<0.1

<0.1

<0.1

<0.03

<0.03

AROCLOR

1221

PCB

TOTAL

(UG/L)

(39488)

<1.0

<1.0

<1.0

<0.03

<0.03

AROCLOR

1232

PCB

TOTAL

(UG/L)

(39492) .

<0.1

<0.1

<0.1

APR 1993

25.

MAY

18.

0810

1342

0.1

<0.1

<0.020

<0.020

<0.060

<0.060

<0.030

<0.030

<0.80

<0.80

<0.030

<0.030

<2

<2

<0.1

<0.1

<1.0

<1.0

<0.1

<0.1

1-10
7263559 - PARKWAY PLACE AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

APR

25

MAY

18

DATE

JULY

15

AUG

05

NOV

12

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

. 0330

1993

. 0810

. 1342

TIME

1992

. 1655

. 0612

0330

AROCLOR

1242

PCB

TOTAL

(UG/L)

(39496)

<0.1

<0.1

<0.1

<0.1

<0.1

2,2-DI

CHLOROPROPANE

WAT, WH

TOTAL

(UG/L)

(77170)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

N-BUTYL

WATER

UNFLTRD

REC

(UG/L)

(77342)

<0.20

<0.20

<0.20

AROCLOR

1248

PCB

TOTAL

(UG/L)

(39500)

<0. 1

<0. 1

<0. 1

<0. 1

<0.1

1,3-DICHLOROPROPANE

WAT. WH

TOTAL

(UG/L)

(77173)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

SEC

BUTYLWATER

UNFLTRD

REC

(UG/L)

(77350)

<0.20

<0.20

<0.20

AROCLOR

1254

PCB

TOTAL

(UG/L)

(39504)

<0 . 1

<0 . 1

<0 . 1

<0.1

<0.1

PSEUDOCUMENE

WATER

UNFLTRD

REC

(UG/L)

(77222)

<0.20

<0.20

<0.20

<0.20

<0.20

BENZENE

TERTBUTYLWATER

UNFLTRD

REC

(UG/L)

(77353)

<0.20

<0.20

<0.20

AROCLOR

1260

PCB

TOTAL

(UG/L)

(39508)

<0. 1

<0. 1

<0. 1

<0. 1

<0.1

ISOPROPYLBENZENE

WATER

WHOLE

REC

(UG/L)

(77223)

<0.20

<0.20

<0.20

<0.20

<0.20

P-ISOPROPYLTOLUENE

WATER

WHOLE

REC

(UG/L)

(77356)

<0.20

<0.20

<0.20

HEXACHLOROBENZENE

TOTAL

(UG/L)

(39700)

<5.0

<5.0

<5.0

<5.0

<5.0

BENZENE

N-PROPY

WATER

UNFLTRD

REC

(UG/L)

(77224)

<0.20

<0.20

<0.20

<0.20

<0.20

123-TRI

CHLOROPROPANE

WATER

WHOLE

TOTAL

(UG/L)

(77443)

<0.2

<0.2

<0.2

HEXACHLOROBUTADIENE

TOTAL

(UG/L)

(39702)

<5.0

<5.0

<5.0

<5.0

<5.0

MESITYLENE

WATER

UNFLTRD

REC

(UG/L)

(77226)

<0.20

<0.20

<0.20

<0.20

<0.20

ETHANE,

1112-

TETRACHLOROWAT UNF

REC

(UG/L)

(77562)

<0.2

<0.2

<0.2

CIS-1,2 

-DICHLOROETHENE

WATER

TOTAL

(UG/L)

(77093)

<0.2

<0.2

<0.2

<0.2

<0.2

0-

CHLOROTOLUENE

WATER

WHOLE

TOTAL

(UG/L)

(77275)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2,3-

TRICHLORO

BENZENE

WAT, WH

REC

(UG/L)

(77613)

<0.20

<0.20

<0.20

STYRENE

TOTAL

(UG/L)

(77128)

<0.2

<0.2

<0.2

<0.2

<0.2

TOLUENE

P-CHLOR

WATER

UNFLTRD

REC

(UG/L)

(77277)

<0.20

<0.20

<0.20

<0.20

<0.20

1,2-

DIBROMO

ETHANE

WATER

WHOLE

TOTAL

(UG/L)

(77651)

<0.2

<0.2

<0.2

1,1-DI 

CHLOROPROPENE,

WAT,WH

TOTAL

(UG/L)

(77168)

<0.2

<0.2

<0.2

<0.2

<0.2

METHANE

BROMO

CHLOROWAT

UNFLTRD

REC

(UG/L)

(77297)

<0.20

<0.20

<0.20

<0.20

<0.20

FREON113

WATER

UNFLTRD

REC

(UG/L)

(77652)

<0.5

<0.5

<0.5

APR 1993

25

MAY

18

DATE

JULY

. 0810

. 1342

TIME

1992

<0.20

<0.20

METHYL

ETHER

TERTBUTYL

WAT UNF

REC

(UG/L)

(78032)

15. 1655 <1.0

AUG

05. 0612 <1.0

NOV

12. 0330 <1.0

<0.20

<0.20

XYLENE

WATER

UNFLTRD

REC

(UG/L)

(81551)

<0.20

<0.20

<0.20

<0.20

<0.20

BROMOBENZENE

WATER,

WHOLE,

TOTAL

(UG/L)

(81555)

<0.2

<0.2

<0.2

<0.20

<0.20

DIBROMO

CHLOROPROPANE

WATER

WHOLE

TOT. REC

(UG/L)

(82625)

<1.0

<1 .0

<1 .0

<0.2

<0.2

1,2-DIPHENYLHYDRAZINE

WATER

TOT. REC

(UG/L)

(82626)

<5.0

<5.0

<5.0

<0.2

<0.2

OIL AND

GREASE,

TOTAL

RECOV.

GRAVIMETRIC

(MG/L)

(00556)

<1

<1

<1

<0.20

<0.20

<0.2

<0.2

<0.5

<0.5

APR 1993

25. 0810 <1.0

MAY

18. 1342 <1.0

<0.20

<0.20

<0.2

<0.2

<1.0

<1 .0

<5.0

<5.0

<1

<1

1-11
07263578 - ROSEDALE AREA STORMWATER DRAIN AT LITTLE ROCK 

WATER-QUALITY DATA

DATE TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

1900

1508

0714

0355

0830

DATE TIME

JUNE 1992 

11. 1900 

29. 1508

AUG

05. 0714

NOV

12. 

DEC 

09.

0355

0830

DATE TIME

JUNE 1992

11. 

29.

AUG

05. 

NOV

12. 

DEC

09.

1900

1508

0714

0355

0830

DATE TIME

JUNE 1992 

11. 1900 

29. 1508

AUG

05. 0714

NOV

12. 0355

DEC

09. 0830

AGENCY

COLLECTING

SAMPLE

(CODE

NUMBER)

(00027)

80513

80513

80513

80513

80513

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

(00925)

0.71

0.76

0.65

0.67

0.83

SOLIDS,

DISSOLVED

(TONS

PER

AC-FT)

(70303)

0.04

0.05

0.05

0.05

0.08

NITROGEN, AMMONIA +

ORGANIC

TOTAL

(MG/L

AS N)

(00625)

1.9

2.2

1.8

0.60

AGENCY

ANALYZING

SAMPLE

(CODE

NUMBER)

(00028)

80020

80020

80020

80020

80020

SODIUM,

DISSOLVED

(MG/L

AS NA)

(00930)

3.1

3.2

2.3

1.9

1.8

RESIDUE

TOTAL

AT 105

DEC. C,

SUSPENDED

(MG/L)

(00530)

646

476

167

227

44

PHOSPHORUS

TOTAL

(MG/L

AS P)

(00665)

0.440

0.580

0.470

0.180

SPECIFIC

CONDUCTANCE

LAB

(US/CM)

(90095)

38

44

35

36

40

SODIUM

ADSORPTION

RATIO

(00931)

0.4

0.4

0.3

0.3

0.2

NITROGEN,

NITRITE

TOTAL

(MG/L

AS N)

(00615)

0.030

0.100

0.020

0.050

PHOSPHORUS

DISSOLVED

(MG/L

AS P)

(00666)

0.120

0.080

0.100

0.090

PH

WATER

WHOLE

LAB

(STANDARD

UNITS)

(00403)

6.7

6.6

6.7

7.4

6.8

SODIUM

PERCENT

(00932)

40

37

31

25

24

NITROGEN,

N02+N03

TOTAL

(MG/L

AS N)

(00630)

0.400

0.760

0.430

0.240

CARBON,

ORGANIC

TOTAL

(MG/L

AS C)

(00680)

23

20

21

21

11

OXYGEN

DEMAND,

BIOCHEMICAL,

5 DAY

(MG/L)

(00310)

12

11

9.2

5.2

4.5

POTASSIUM,

DISSOLVED

(MG/L

AS K)

(00935)

0.50

1.1

1.7

3.2

2.0

NITROGEN,

AMMONIA

TOTAL

(MG/L

AS N)

(00610)

0.220

0.380

0.110

0.110

ARSENIC

TOTAL

(UG/L

AS AS)

(01002)

1

2

2

1

<1

OXYGEN

DEMAND,

CHEMICAL

(HIGH

LEVEL)

(MG/L)

(00340)

86

67

48

79

27

ALKALINITY

LAB

(MG/L

AS

CAC03)

(90410)

9.0

8.4

11

8.8

9.8

NITROGEN,

AMMONIA

TOTAL

(MG/L

AS NH4)

(71845)

0.28

0.49

0.14

0.14

BERYLLIUM,

TOTAL

RECOVERABLE

(UG/L

AS BE)

(01012)

<10

<10

<10

<10

<10

COLIFORM,

FECAL,

0.7

UM-MF

(COLS./

100 ML)

(31625)

>60000

250000

270000

K60000

K7800

SULFATE

DISSOLVED

(MG/L

AS S04)

(00945)

2.9

3.4

2.3

2.6

3.7

NITROGEN,

ORGANIC

TOTAL

(MG/L

AS N)

(00605)

1.7

1.8

1.7

0.49

CADMIUM

TOTAL

RECOVERABLE

(UG/L

AS CD)

(01027)

<1

<1

<1

<1

<1

STREPTOCOCCI

FECAL,

KF AGAR

(COLS.

PER

100 ML)

(31673)

>100000

480000

440000

580000

300000

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

(00940)

1.8

1.6

0.80

1.7

2.4

NITROGEN,

TOTAL

(MG/L

AS N)

(00600)

2.3

3.0

2.2

0.84

CHROMIUM,

TOTAL

RECOVERABLE

(UG/L

AS CR)

(01034)

8

6

6

3

<1

HARDNESS

TOTAL

(MG/L

AS

CAC03)

(00900)

9

11

9

9

10

SOLIDS,

RESIDUE

AT 180

DEC. C

DISSOLVED

(MG/L)

(70300)

27

40

33

39

58

NITROGEN,

TOTAL

(MG/L

AS N03)

(71887)

10

13

9.9

3.7

COPPER,

TOTAL

RECOVERABLE

(UG/L

AS CU)

(01042)

14

7

5

5

4

CALCIUM

DISSOLVED

(MG/L

AS CA)

(00915)

2.6

3.0

2.6

2.3

2.6

SOLIDS,

SUM OF

CONSTITUENTS,

DISSOLVED

(MG/L)

(70301)

17

18

17

18

19

NITROGEN,

NITRATE

TOTAL

(MG/L

AS N)

(00620)

0.370

0.660

0.410

0.190

LEAD,

TOTAL

RECOVERABLE

(UG/L

AS PB)

(01051)

36

25

20

15

8

1-12
07263578 - ROSEDALE AREA STORMWATER DRAIN AT LITTLE ROCK continued 

WATER-QUALITY DATA

DATE

JUNE

11.

29.

AUG

05.

NOV

12.

DEC

09.

DATE

JUNE

11.

29.

AUG

05.

NOV

12.

DEC

09.

DATE

JUNE

11.

29.

AUG

05.

NOV

12.

DEC

09.

DATE

JUNE

11.

29.

AUG

05.

NOV

12.

DEC

09.

TIME

1992

1900

, 1508

, 0714

0355

0830

TIME

1992

1900

1508

0714

0355

0830

TIME

1992

1900

1508

0714

0355

0830

TIME

1992

1900

1508

0714

0355

0830

THALLIUM,

TOTAL

(UG/L

AS TL)

(01059)

<10

<5

<5

<5

<10

1, 2-DICHLOROETHANE

TOTAL

(UG/L)

(32103)

<0.2

<0.2

<0.2

<0.2

<0.2

ACRYLONITRILE

TOTAL

(UG/L)

(34215)

<20

<20

<20

<20

<20

CHLOROBENZENE

TOTAL

(UG/L)

(34301)

<0.20

<0.20

<0.20

<0.20

<0.20

MERCURY

TOTAL

RECOVERABLE

(UG/L

AS HG)

(71900)

<0.10

<0.10

<0.10

<0.10

0.20

BROMOFORM

TOTAL

(UG/L)

(32104)

<0.2

<0.2

<0.2

<0.2

<0.2

ANTHRACENE

TOTAL

(UG/L)

(34220)

<5.0

<5.0

<5.0

<5.0

<5.0

CHLOROETHANE

TOTAL

(UG/L)

(34311)

<0.2

<0.2

<0.2

<0.2

<0.2

NICKEL,

TOTAL

RECOVERABLE

(UG/L

AS NI)

(01067)

9

5

5

4

3

CHLORODIBROMOMETHANE

TOTAL

(UG/L)

(32105)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZO B

FLUORANTHENE

TOTAL

(UG/L)

(34230)

<10.0

<10.0

<10.0

<10.0

<10.0

CHRYSENE

TOTAL

(UG/L)

(34320)

<10.0

<10.0

<10.0

<10.0

<10.0

SELENIUM,

TOTAL

(UG/L

AS SE)

(01147)

<2

<2

<1

<2

<2

CHLOROFORM

TOTAL

(UG/L)

(32106)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZO K

FLUORANTHENE

TOTAL

(UG/L)

(34242)

<10.0

<10.0

<10.0

<10.0

<10.0

DIETHYL

PHTHALATE

TOTAL

(UG/L)

(34336)

<5.0

<5.0

<5.0

<5.0

<5.0

SILVER,

TOTAL

RECOVERABLE

(UG/L

AS AG)

(01077)

<1

<1

<1

<1

<1

PHENOLS

TOTAL

(UG/L)

(32730)

3

2

6

5

6

BENZOAPYRENE

TOTAL

(UG/L)

(34247)

<10.0

<10.0

<10.0

<10.0

<10.0

DIMETHYL

PHTHALATE

TOTAL

(UG/L)

(34341)

<5.0

<5.0

<5.0

<5.0

<5.0

ZINC,

TOTAL

RECOVERABLE

(UG/L

AS ZN)

(01092)

80

70

70

50

30

TOLUENE

TOTAL

(UG/L)

(34010)

0.2

<0.2

<0.2

<0.2

<0.2

DELTA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(34259)

<0.09

<0.09

<0.09

<0.09

<0.09

ENDOSULFAN

SULFATE

TOTAL

(UG/L)

(34351)

<0.60

<0. 60

<0.60

<0.60

<0.60

CYANIDE

TOTAL

(MG/L

AS CN)

(00720)

<0.010

<0.010

<0.010

<0.010

<0.010

BENZENE

TOTAL

(UG/L)

(34030)

<0.2

<0.2

<0.2

<0.2

<0.2

BIS

2-

CHLOROETHYL

ETHER

TOTAL

(UG/L)

(34273)

<5.0

<5.0

<5.0

<5.0

<5.0

ENDOSULFAN

BETA

TOTAL

(UG/L)

(34356)

<0.04

<0.04

<0.04

<0.04

<0.04

DIBROMOMETHANE

WATER

WHOLE

RECOVER

(UG/L)

(30217)

<0.2

<0.2

<0.2

<0.2

<0.2

ACENAP HTHYLENE

TOTAL

(UG/L)

(34200)

<5.0

<5.0

<5.0

<5.0

<5.0

BIS

(2-

CHLOROETHOXY)

METHANE

TOTAL

(UG/L)

(34278)

<5.0

<5.0

<5.0

<5.0

<5.0

ENDOSULFANI

WATER

WHOLE

REC

(UG/L)

(34361)

<0.10

<0.10

<0.10

<0.10

<0.10

DICHLOROBROMOMETHANE

TOTAL

(UG/L)

(32101)

<0.2

<0.2

<0.2

<0.2

<0.2

ACENAPHTHENE

TOTAL

(UG/L)

(34205)

<5.0

<5.0

<5.0

<5.0

<5.0

BIS (2-

CHLOROISOPROPYL)

ETHER

TOTAL

(UG/L)

(34283)

<5.0

<5.0

<5.0

<5.0

<5.0

ENDRIN

ALDEHYDE

TOTAL

(UG/L)

(34366)

<0.20

<0.20

<0.20

<0.20

<0.20

CARBONTETRACHLORIDE

TOTAL

(UG/L)

(32102)

<0.2

<0.2

<0.2

<0.2

<0.2

ACROLEIN

TOTAL

(UG/L)

(34210)

<20

<20

<20

<20

<20

N-BUTYL

BENZYL

PHT HALATE

TOTAL

(UG/L)

(34292)

<5.0

<5.0

<5.0

<5.0

<5.0

ETHYLBENZENE

TOTAL

(UG/L)

(34371)

<0.2

<0.2

<0.2

<0.2

<0.2

1-13
07263578 - ROSEDALE AREA STORMWATER DRAIN AT LITTLE ROCK continued 

WATER-QUALITY DATA

DATE TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

DATE

1900

1508

0714

0355

0830

TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

1900

1508

0714

0355

0830

DATE TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

1900

1508

0714

0355

0830

DATE TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

1900

1508

0714

0355

0830

FLUORANTHENE

TOTAL

(UG/L)

(34376)

<5.0

<5.0

<5.0

<5.0

<5.0

N-NITRO

-SODIPHENYLAMINE

TOTAL

(UG/L)

(34433)

<5.0

<5.0

<5.0

<5.0

<5.0

1,1,1-

TRICHLOROETHANE

TOTAL

(UG/L)

(34506)

<0.2

<0.2

<0.4

<0.2

<0.2

BENZENE

1,3-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34566)

<5.0

<5.0

<5.0

<5.0

<5.0

FLUORENE

TOTAL

(UG/L)

(34381)

<5.0

<5.0

<5.0

<5.0

<5.0

N-NITRO

-SODIMETHYLAMINE

TOTAL

(UG/L)

(34438)

<5.0

<5.0

<5.0

<5.0

<5.0

1,1,2-

TRICHLOROETHANE

TOTAL

(UG/L)

(34511)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,4-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34571)

<5.0

<5.0

<5.0

<5.0

<5.0

HEXACHLOROCYCLOPENTADIENE

TOTAL

(UG/L)

(34386)

<5.0

<5.0

<5.0

<5.0

<5.0

NITROBENZENE

TOTAL

(UG/L)

(34447)

<5.0

<5.0

<5.0

<5.0

<5.0

ETHANE,

1,1,2,2

TETRACHLOROWAT UNF

REC

(UG/L)

(34516)

<0.2

<0.2

<0.2

<0.2

<0.2

2-

CHLOROETHYLVINYLETHER

TOTAL

(UG/L)

(34576)

<1.0

<1.0

<1.0

<1.0

<1.0

HEXACHLOROETHANE

TOTAL

(UG/L)

(34396)

<5.0

<5.0

<5.0

<5.0

<5.0

PARACHLOROMETA

CRESOL

TOTAL

(UG/L)

(34452)

<30.0

<30.0

<30.0

<30.0

<30.0

BENZOGH

I PERYL

ENE1,12

-BENZOP

ERYLENE

TOTAL

(UG/L)

(34521)

<10.0

<10.0

<10.0

<10.0

<10.0

2-

CHLORONAPHTHALENE

TOTAL

(UG/L)

(34581)

<5.0

<5.0

<5.0

<5.0

<5.0

INDENO

(1,2,3-

CD)

PYRENE

TOTAL

(UG/L)

(34403)

<10.0

<10.0

<10.0

<10.0

<10.0

PHENANTHRENE

TOTAL

(UG/L)

(34461)

<5.0

<5.0

<5.0

<5.0

<5.0

BENZO A

ANTHRAC

ENE1,2-

BENZANT

HRACENE

TOTAL

(UG/L)

(34526)

<10.0

<10.0

<10.0

<10.0

<10.0

2-

CHLOROPHENOL

TOTAL

(UG/L)

(34586)

<5.0

<5.0

<5.0

<5.0

<5.0

ISOP HO RONE

TOTAL

(UG/L)

(34408)

<5.0

<5.0

<5.0

<5.0

<5.0

PYRENE

TOTAL

(UG/L)

(34469)

<5.0

<5.0

<5.0

<5.0

<5.0

BENZENE

0-

CHLOROWATER

UNFLTRD

REC

(UG/L)

(34536)

<5.0

<5.0

<5.0

<5.0

<5.0

2-

NITROPHENOL

TOTAL

(UG/L)

(34591)

<5.0

<5.0

<5.0

<5.0

<5.0

METHYLBROMIDE

TOTAL

(UG/L)

(34413)

<0.2

<0.2

<0.2

<0.2

<0.2

TETRACHLOROETHYLENE

TOTAL

(UG/L)

(34475)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-DICHLOROPROPANE

TOTAL

(UG/L)

(34541)

<0.2

<0.2

<0.2

<0.2

<0.2

DI-NOCTYL

PHTHALATE

TOTAL

(UG/L)

(34596)

<10.0

<10.0

<10.0

<10.0

<10.0

METHYLCHLORIDE

TOTAL

(UG/L)

(34418)

<0.2

<0.2

<0.2

<0.2

<0.2

TRICHLOROFLUOROMETHANE

TOTAL

(UG/L)

(34488)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-

TRANSDI

CHLOROETHENE

TOTAL

(UG/L)

(34546)

<0.2

<0.2

<0.2

<0.2

<0.2

2,4-DICHLOROPHENOL

TOTAL

(UG/L)

(34601)

<5.0

<5.0

<5.0

<5.0

<5.0

METHYLENE

CHLORIDE

TOTAL

(UG/L)

(34423)

<0.2

<0.2

<0.2

<0.2

<0.2

1,1-DICHLOROETHANE

TOTAL

(UG/L)

(34496)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,2,4-

TRICHLOROWAT UNF

REC

(UG/L)

(34551)

<5.0

<5.0

<5.0

<5.0

<5.0

2,4-DIMETHYLPHENOL

TOTAL

(UG/L)

(34606)

<5.0

<5.0

<5.0

<5.0

<5.0

NNITROSODI-NPROPYLAMINE

TOTAL

(UG/L)

(34428)

<5.0

<5.0

<5.0

<5.0

<5.0

1,1-DICHLOROETHYLENE

TOTAL

(UG/L)

(34501)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2,5,6

-DIBENZ

-ANTHRA

-CENE

TOTAL

(UG/L)

(34556)

<10.0

<10.0

<10.0

<10.0

<10.0

2,4-DINITROTOLUENE

TOTAL

(UG/L)

(34611)

<5.0

<5.0

<5.0

<5.0

<5.0

1-14
07263578 - ROSEDALE AREA STORMWATER DRAIN AT LITTLE ROCK continued 

WATER-QUALITY DATA

DATE TIME

JUNE 1992 

11. 1900 

29. 1508

AUG

05. 0714

NOV

12. 0355

DEC

09. 0830

DATE TIME

JUNE 1992 

11. 1900 

29. 1508

AUG

05. 0714

NOV

12. 0355

DEC

09. 0830

DATE TIME

JUNE 1992 

11. 1900 

29. 1508

AUG

05. 0714

NOV

12. 0355

DEC

09. 0830

DATE TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

1900

1508

0714

0355

0830

2,4,-

DINITROPHENOL

TOTAL

(UG/L)

(34616)

<20.0

<20.0

<20.0

<20.0

<20.0

NAPHTHALENE

TOTAL

(UG/L)

(34696)

<5.0

<5.0

<5.0

<5.0

<5.0

TRICHLOROETHYLENE

TOTAL

(UG/L)

(39180)

<0.2

<0.2

<0.2

<0.2

<0.2

HEPTACHLOR,

TOTAL

(UG/L)

(39410)

<0.030

<0.030

<0.030

<0.030

<0.030

2,4,6-

TRICHLOROPHENOL

TOTAL

(UG/L)

(34621)

<20.0

<20.0

<20.0

<20.0

<20.0

TRANS1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34699)

<0.2

<0.2

<0.2

<0.2

<0.2

P,P'

DOT,

TOTAL

(UG/L)

(39300)

<0.10

<0.10

<0.10

<0.10

<0.10

HEPTACHLOR

EPOXIDE

TOTAL

(UG/L)

(39420)

<0.80

<0.80

<0.80

<0.80

<0.80

2,6-DINITROTOLUENE

TOTAL

(UG/L)

(34626)

<5.0

<5.0

<5.0

<5.0

<5.0

CIS

1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34704)

<0.2

<0.2

<0.2

<0.2

<0.2

P,P'

ODD,

TOTAL

(UG/L)

(39310)

<0.10

<0.10

<0.10

<0.10

<0.10

LINDANE

TOTAL

(UG/L)

(39340)

<0.030

<0.030

<0.030

<0.030

<0.030

3,3'-

DICHLOROBENZIDINE

TOTAL

(UG/L)

(34631)

<20.0

<20.0

<20.0

<20.0

<20.0

PENTACHLOROPHENOL

TOTAL

(UG/L)

(39032)

<30.0

<30.0

<30.0

<30.0

<30.0

P,P'

DDE,

TOTAL

(UG/L)

(39320)

<0.04

<0.04

<0.04

<0.04

<0.04

TOXAPHENE,

TOTAL

(UG/L)

(39400)

<2

<2

<2

<2

<2

4-

BROMOPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34636)

<5.0

<5.0

<5.0

<5.0

<5.0

CHLORDANE

CIS

WATER

WHOLE

TOTAL

(UG/L)

(39062)

<0.10

<0.10

<0.10

<0.10

<0.10

ALDRIN,

TOTAL

(UG/L)

(39330)

<0.040

<0.040

<0.040

<0.040

<0.040

AROCLOR

1016

PCB

TOTAL

(UG/L)

(34671).

<0.1

<0 . 1

<0 . 1

<0. 1

<0. 1

4-

CHLOROPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34641)

<5.0

<5.0

<5.0

<5.0

<5.0

CHLORDANE

TRANS

WATER

WHOLE

TOTAL

(UG/L)

(39065)

<0.10

<0.10

<0.10

<0.10

<0.10

ALPHA

BHC

TOTAL

(UG/L)

(39337)

<0.03

<0.03

<0.03

<0.03

<0.03

AROCLOR

1221

PCB

TOTAL

(UG/L)

(39488)

<1.0

<1.0

<1.0

<1.0

<1.0

4-

NITROPHENOL

TOTAL

(UG/L)

(34646)

<30.0

<30.0

<30.0

<30.0

<30.0

BIS(2-

ETHYL

HEXYL)

PHTHALATE

TOTAL

(UG/L)

(39100)

<5.0

<5.0

<5.0

<5.0

<5.0

BETA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(39338)

<0.03

<0.03

<0.03

<0.03

<0.03

AROCLOR

1232

PCB

TOTAL

(UG/L)

(39492)

<0 .1

<0 . 1

<0 . 1

<0 . 1

<0 . 1

4,6-

DINITRO

-ORTHOC RE SOL

TOTAL

(UG/L)

(34657)

<30.0

<30.0

<30.0

<30.0

<30.0

DI-NBUTYL

PHTHALATE

TOTAL

(UG/L)

(39110)

<5.0

<5.0

<5.0

<5.0

<5.0

CHLORDANE,

TOTAL

(UG/L)

(39350)

0.1

<0 . 1

<0 . 1

0.1

0.1

AROCLOR

1242

PCB

TOTAL

(UG/L)

(39496)

<0 . 1

<0 . 1

<0 . 1

0.1

<0 . 1

DICHLORODIFLUOROMETHANE

TOTAL

(UG/L)

(34668)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZIDINE

TOTAL

(UG/L)

(39120)

<40.0

<40.0

<40.0

<40.0

<40.0

DIELDRIN

TOTAL

(UG/L)

(39380)

<0.020

<0.020

<0.020

<0.020

<0.020

AROCLOR

1248

PCB

TOTAL

(UG/L)

(39500)

O.I

<0. 1

<0 . 1

<0 . 1

<0 . 1

PHENOL

(C6H50H)

TOTAL

(UG/L)

(34694)

<5.0

<5.0

<5.0

<5.0

<5.0

VINYL

CHLORIDE

TOTAL

(UG/L)

(39175)

<0.2

<0.2

0.2

<0.2

0.2

ENDRIN

WATER

UNFLTRD

REG

(UG/L)

(39390)

O.060

O.060

O.060

O.060

O.060

AROCLOR

1254

PCB

TOTAL

(UG/L)

(39504)

0.1

0.1

<0 . 1

0 . 1

0.1

1-15
07263576 - ROSEDALE AREA STORMWATER DRAIN AT LITTLE ROCK continued 

WATER-QUALITY DATA

DATE TIME

JUNE 1992 

11. 1900 

29. 1508

AUG

05. 0714

NOV

12. 

DEC 

09.

0355

0630

DATE TIME

JUNE 1992

11.

29. 

AUG

05. 

NOV

12. 

DEC

09.

1900

1506

0714

0355

0630

DATE TIME

JUNE 1992 

11. 1900 

29. 1506

AUG

05. 0714

NOV

12. 

DEC 

09.

0355

0630

AROCLOR

1260

PCB

TOTAL

(UG/L)

(39506)

<0.1

<0.1

<0.1

<0.1

<0.1

BENZENE

N-PROPY

WATER

UNFLTRD

REC

(UG/L)

(77224)

<0.20

<0.20

<0.20

<0.20

<0.20

ETHANE,

1112-

TETRACHLOROWAT UNF

REC

(UG/L)

(77562)

<0.2

<0.2

<0.2

<0.2

<0.2

HEXACHLOROBENZENE

TOTAL

(UG/L)

(39700)

<5.0

<5.0

<5.0

<5.0

<5.0

MESITYLENE

WATER

UNFLTRD

REC

(UG/L)

(77226)

<0.20

<0.20

<0.20

<0.20

<0.20

1,2,3-

TRICHLORO

BENZENE

WAT, WH

REC

(UG/L)

(77613)

<0.20

<0.20

<0.20

<0.20

<0.20

HEXACHLOROBUTADIENE

TOTAL

(UG/L)

(39702)

<5.0

<5.0

<5.0

<5.0

<5.0

0-

CHLOROTOLUENE

WATER

WHOLE

TOTAL

(UG/L)

(77275)

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-

DIBROMO

ETHANE

WATER

WHOLE

TOTAL

(UG/L)

(77651)

<0.2

<0.2

<0.2

<0.2

<0.2

CIS-1,2

-DICHLOROETHENE

WATER

TOTAL

(UG/L)

(77093)

<0.2

<0.2

<0.2

<0.2

<0.2

TOLUENE

P-CHLOR

WATER

UNFLTRD

REC

(UG/L)

(77277)

<0.20

<0.20

<0.20

<0.20

<0.20

FREON113

WATER

UNFLTRD

REC

(UG/L)

(77652)

<0.5

<0.5

<0.5

<0.5

<0.5

STYRENE

TOTAL

(UG/L)

(77128)

<0.2

<0.2

<0.2

<0.2

<0.2

METHANE

BROMO

CHLOROWAT

UNFLTRD

REC

(UG/L)

(77297)

<0.20

<0.20

<0.20

<0.20

<0.20

METHYL

ETHER

TERTBUTYL

WAT UNF

REC

(UG/L)

(76032)

<1.0

<1.0

<1.0

<1.0

<1.0

1,1-DI

CHLOROPROPENE,

WAT, WH

TOTAL

(UG/L)

(77166)

<0.2

<0.2

<0.2

<0.2

<0.2-

BENZENE

N-BUTYL

WATER

UNFLTRD

REC

(UG/L)

(77342)

<0.20

<0.20

<0.20

<0.20

<0.20

XYLENE

WATER

UNFLTRD

REC

(UG/L)

(61551)

<0.20

<0.20

<0.20

<0.20

<0.20

2,2-DI

CHLOROPROPANE

WAT, WH

TOTAL

(UG/L)

(77170)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

SEC

BUTYLWATER

UNFLTRD

REC

(UG/L)

(77350)

<0.20

<0.20

<0.20

<0.20

<0.20

BROMOBENZENE

WATER,

WHOLE,

TOTAL

(UG/L)

(61555)

<0.2

<0.2

<0.2

<0.2

<0.2

1,3-DICHLOROPROPANE

WAT. WH

TOTAL

(UG/L)

(77173)

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

TERTBUTYLWATER

UNFLTRD

REC

(UG/L)

(77353)

<0.20

<0.20

<0.20

<0.20

<0.20

D I BROMO

CHLOROPROPANE

WATER

WHOLE

TOT. REC

(UG/L)

(82625)

<1.0

<1.0

<1.0

<1.0

<1.0

PSEUDOCUMENE

WATER

UNFLTRD

REC

(UG/L)

(77222)

<0.20

<0.20

<0.20

<0.20

<0.20

P-ISOPROPYLTOLUENE

WATER

WHOLE

REC

(UG/L)

(77356)

<0.20

<0.20

<0.20

<0.20

<0.20

1,2-DIPHENYLHYDRAZINE

WATER

TOT. REC

(UG/L)

(82626)

<5.0

<5.0

<5.0

<5.0

<5.0

ISOPROPYLBENZENE

WATER

WHOLE

REC

(UG/L)

(77223)

<0.20

<0.20

<0.20

<0.20

<0.20

123-TRI

CHLOROPROPANE

WATER

WHOLE

TOTAL

(UG/L)

(77443)

<0.2

<0.2

<0.2

<0.2

<0.2

OIL AND

GREASE,

TOTAL

RECOV.

GRAVIMETRIC

(MG/L)

(00556)

4

<1

1

3

<1

1-16
07263592 - UNIVERSITY SHOPPING MALL AREA STORMWATER DRAIN AT LITTLE ROCK

WATER-QUALITY DATA

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

AGENCY

COLLECTING

SAMPLE

(CODE

NUMBER)

(00027)

80513

80513

80513

80513

80513

80513

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

(00925)

0.43

0.33

0.35

0.32

0.29

0.21

SOLIDS,

DISSOLVED

(TONS

PER

AC-FT)

(70303)

0.04

0.03

0.02

0.03

0.02

0.02

NITROGEN,

TOTAL

(MG/L

AS N)

(00600)

1.3

0.83

0.90

0.96

0.68

0.80

AGENCY

ANALYZING

SAMPLE

(CODE

NUMBER)

(00028)

80020

80020

80020

80020

80020

80020

SODIUM,

DISSOLVED

(MG/L

AS NA)

(00930)

1.9

1.1

1.1

1.0

1.2

0.40

RESIDUE

TOTAL

AT 105

DEG. C,

SUSPENDED

(MG/L)

(00530)

69

76

78

55

18

66

NITROGEN,

TOTAL

(MG/L

AS N03)

(71887)

5.9

3.7

_

SPECIFIC

CONDUCTANCE

LAB

(US/ CM)

(90095)

42

30

29

30

27

21

SODIUM

ADSORPTION

RATIO

(00931)

0.3

0.2

0.2

0.2

0.2

0.1

NITROGEN,

NITRITE

TOTAL

(MG/L

AS N)

(00615)

0.060

0.030

_

NITROGEN,

NITRATE

TOTAL

(MG/L

AS N)

(00620)

0.380

0.300

0.300

0.350

0.280

0.200

PH

WATER

WHOLE

LAB

(STANDARD

UNITS)

(00403)

6.8

6.4

6.3

6.2

7.9

7.6

SODIUM

PERCENT

(00932)

26

21

21

18

24

12

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

(00613)

<0.010

0.010

<0.010

<0.010

NITROGEN, AMMONIA +

ORGANIC

TOTAL

(MG/L

AS N)

(00625)

0.90

0.50

0.60

0.60

0.40

0.60

OXYGEN

DEMAND,

BIOCHEMICAL,

5 DAY

(MG/L)

(00310)

9.2

18

5.3

12

5.4

2.8

POTASSIUM,

DISSOLVED

(MG/L

AS K)

(00935)

0.90

1.1

0.90

1.3

0.90

0.70

NITROGEN,

N02+N03

TOTAL

(MG/L

AS N)

(00630)

0.440

0.330

_

__

PHOSPHORUS

TOTAL

(MG/L

AS P)

(00665)

0.170

0.130

0.110

0.100

0.080

0.120

OXYGEN

DEMAND,

CHEMICAL

(HIGH

LEVEL)

(MG/L)

(00340)

180

31

39

53

25

31

ALKALINITY

LAB

(MG/L

AS

CAC03)

(90410)

10

7.2

8.0

6.7

8.0

5.9

NITROGEN,

N02+N03

DISSOLVED

(MG/L

AS N)

(00631)

__

0.300

0.360

0.280

0.200

PHOSPHORUS

DISSOLVED

(MG/L

AS P)

(00666)

0.060

0.130

0.090

0.100

0.070

0.020

COLIFORM,

FECAL,

0.7

UM-MF

(COLS./

100 ML)

(31625)

29000

4800

>60000

24000

K6400

42000

SULFATE

DISSOLVED

(MG/L

AS S04)

(00945)

4.0

2.8

2.8

2.7

2.1

1.9

NITROGEN,

AMMONIA

TOTAL

(MG/L

AS N)

(00610)

0.260

0.200

_

CARBON,

ORGANIC

TOTAL

(MG/L

AS C)

(00680)

11

12

12

13

7.3

7.8

STREPTOCOCCI

FECAL,

KF AGAR

(COLS.

PER

100 ML)

(31673)

62000

7500

59000

47000

38000

44000

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

(00940)

1.8

1.2

1.0

1.3

1.4

1.4

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

(00608)

0.270

0.260

0.220

0.150

ARSENIC

TOTAL

(UG/L

AS AS)

(01002)

11

4

2

2

2

3

HARDNESS

TOTAL

(MG/L

AS

CAC03)

(00900)

11

8

8

8

7

6

SOLIDS,

RESIDUE

AT 180

DEG. C

DISSOLVED

(MG/L)

(70300)

27

26

14

23

17

18

NITROGEN,

AMMONIA

TOTAL

(MG/L

AS NH4)

(71845)

0.33

0.26

__

BERYLLIUM,

TOTAL

RECOVERABLE

(UG/L

AS BE)

(01012)

<10

<10

<10

<10

<10

<10

CALCIUM

DISSOLVED

(MG/L

AS CA)

(00915)

3.6

2.5

2.5

2.8

2.3

1.9

SOLIDS,

SUM OF

CONSTITUENTS,

DISSOLVED

(MG/L)

(70301)

19

13

15

15

15

11

NITROGEN,

ORGANIC

TOTAL

(MG/L

AS N)

(00605)

0.64

0.30

0.33

0.34

0.18

0.45

CADMIUM

TOTAL

RECOVERABLE

(UG/L

AS CD)

(01027)

<1

<1

<1

<1

<1

<1

1-17
07263592 - UNIVERSITY SHOPPING MALL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

\TE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

CHROMIUM,

TOTAL

RECOVERABLE

(UG/L

AS CR)

(01034)

5

3

1

4

1

<1

DIBROMOME THANE

WATER

WHOLE

RECOVER

(UG/L)

(30217)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ACENAPHTHYLENE

TOTAL

(UG/L)

(34200)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

BIS

(2-

CHLOROETHOXY)

METHANE

TOTAL

(UG/L)

(34278)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

COPPER,

TOTAL

RECOVERABLE

(UG/L

AS CU)

(01042)

11

9

8

9

6

5

DICHLOROBROMOMETHANE

TOTAL

(UG/L)

(32101)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ACENAP HTHENE

TOTAL

(UG/L)

(34205)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

BIS (2-

CHLOROISOPROPYL)

ETHER

TOTAL

(UG/L)

(34283)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

LEAD,

TOTAL

RECOVERABLE

(UG/L

AS PB)

(01051)

27

20

21

15

9

18

CARBONTETRACHLORIDE

TOTAL

(UG/L)

(32102)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ACROLEIN

TOTAL

(UG/L)

(34210)

<20

<20

<20

<20

<20

<20

N- BUTYL

BENZYL

PHT HALATE

TOTAL

(UG/L)

(34292)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

THALLIUM,

TOTAL

(UG/L

AS TL)

(01059)

<5

<5

<5

<5

<5

<5

1,2-DICHLOROETHANE

TOTAL

(UG/L)

(32103)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ACRYLONITRILE

TOTAL

(UG/L)

(34215)

<20

<20

<20

<20

<20

<20

CHLOROBENZENE

TOTAL

(UG/L)

(34301)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

MERCURY

TOTAL

RECOVERABLE

(UG/L

AS HG)

(71900)

<0.10

<0.10

0.10

0.10

0.90

<0.10

BROMOFORM

TOTAL

(UG/L)

(32104)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ANTHRACENE

TOTAL

(UG/L)

(34220)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

CHLOROETHANE

TOTAL

(UG/L)

(34311)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

NICKEL,

TOTAL

RECOVERABLE

(UG/L

AS NI)

(01067)

4

3

3

3

2

2

CHLORODIBROMOMETHANE

TOTAL

(UG/L)

(32105)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZO B

FLUORANTHENE

TOTAL

(UG/L)

(34230)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

CHRYSENE

TOTAL

(UG/L)

(34320)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

SELENIUM,

TOTAL

(UG/L

AS SE)

(01147)

<2

<2

<2

<2

1

<1

CHLOROFORM

TOTAL

(UG/L)

(32106)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZO K

FLUORANTHENE

TOTAL

(UG/L)

(34242)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

DIETHYL

PHTHALATE

TOTAL

(UG/L)

(34336)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

SILVER,

TOTAL

RECOVERABLE

(UG/L

AS AG)

(01077)

<1

<1

<1

<1

<1

<1

PHENOLS

TOTAL

(UG/L)

(32730)

2

7

4

3

2

<1

BENZOAPYRENE

TOTAL

(UG/L)

(34247)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

DIMETHYL

PHT HALATE

TOTAL

(UG/L)

(34341)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

ZINC,

TOTAL

RECOVERABLE

(UG/L

AS ZN)

(01092)

110

80

100

90

90

80

TOLUENE

TOTAL

(UG/L)

(34010)

<0.2

0.2

<0.2

<0.2

<0.2

<0.2

DELTA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(34259)

<0.09

<0.09

<0.09

<0.09

<0.09

<0.09

ENDOSULFAN

SULFATE

TOTAL

(UG/L)

(34351)

<0.60

<0.60

<0.60

<0.60

<0.60

<0.60

CYANIDE

TOTAL

(MG/L

AS CN)

(00720)

<0.010

<0.010

<0.010

<0.010

<0.010

<0.010

BENZENE

TOTAL

(UG/L)

(34030)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BIS

2-

CHLOROETHYL

ETHER

TOTAL

(UG/L)

(34273)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

ENDOSULFAN

BETA

TOTAL

(UG/L)

(34356)

<0.04

<0.04

<0.04

<0.04

<0.04

<0.04

1-18
07263592 - UNIVERSITY SHOPPING MALL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

ENDOSULFANI

WATER

WHOLE

REC

(UG/L)

(34361)

<0.10

<0.10

<0.10

<0.10

<0.10

<0.10

METHYLCHLORIDE

TOTAL

(UG/L>

(34418)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

TRICHLOROFLUOROMETHANE

TOTAL

(UG/L)

(34488)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-

TRANSDI

CHLOROETHENE

TOTAL

(UG/L)

(34546)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ENDRIN

ALDEHYDE

TOTAL

(UG/L)

(34366)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

METHYLENE

CHLORIDE

TOTAL

(UG/L)

(34423)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,1-DICHLOROETHANE

TOTAL

(UG/L)

(34496)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,2,4-

TRICHLOROWAT UNF

REC

(UG/L)

(34551)

<5.0

<5.0

<0.20

<5.0

<5.0

<5.0

ETHYLBENZENE

TOTAL

(UG/L)

(34371)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

NNITROSODI-NPROPYLAMINE

TOTAL

(UG/L)

(34428)

<5.0

<5.0

<5.0

<5.0

<5.0

 <5.0

1,1-DICHLOROETHYLENE

TOTAL

(UG/L)

(34501)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,2,5, 6

-DIBENZ

-ANTHRA

-CENE

TOTAL

(UG/L)

(34556)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

FLUORANTHENE

TOTAL

(UG/L)

(34376)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

N-NITRO

-SODIPHENYLAMINE

TOTAL

(UG/L)

(34433)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

1,1,1-

TRICHLOROETHANE

TOTAL

(UG/L)

(34506)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,3-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34566)

<5.0

<5.0

<0.20

<5.0

<5.0

<5.0

FLUORENE

TOTAL

(UG/L)

(34381)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

N-NITRO

-SODIMETHYLAMINE

TOTAL

(UG/L)

(34438)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

1,1,2-

TRICHLOROETHANE

TOTAL

(UG/L)

(34511)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

1,4-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34571)

<5.0

<5.0

<0.20

<5.0

<5.0

<5.0

HEXACHLOROCYCLOPENTADIENE

TOTAL

(UG/L)

(34386)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

NITROBENZENE

TOTAL

(UG/L)

(34447)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

ETHANE,

1,1,2,2

TETRACHLOROWAT UNF

REC

(UG/L)

(34516)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

2-

CHLOROETHYLVINYLETHER

TOTAL

(UG/L)

(34576)

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

HEXACHLOROETHANE

TOTAL

(UG/L)

(34396)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

PARACHLOROMETA

CRESOL

TOTAL

(UG/L)

(34452)

<30.0

<30.Q

<30.0

<30.0

<30.0

<30.0

BENZOGH

I PERYL

ENE1,12

-BENZOP

ERYLENE

TOTAL

(UG/L)

(34521)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

2-

CHLORONAPHTHALENE

TOTAL

(UG/L)

(34581)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

INDENO

(1,2,3-

CD)

PYRENE

TOTAL

(UG/L)

(34403)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

PHENANTHRENE

TOTAL

(UG/L)

(34461)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

BENZO A

ANTHRAC

ENE1, 2-

BENZANT

HRACENE

TOTAL

(UG/L)

(34526)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

2-

CHLOROPHENOL

TOTAL

(UG/L)

(34586)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

ISOPHORONE

TOTAL

(UG/L)

(34408)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

PYRENE

TOTAL

(UG/L)

(34469)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

BENZENE

0-

CHLOROWATER

UNFLTRD

REC

(UG/L)

(34536)

<5.0

<5.0

<0.20

<5.0

<5.0

<5.0

2-

NITROPHENOL

TOTAL

(UG/L)

(34591)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

METHYLBROMIDE

TOTAL

(UG/L)

(34413)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

TETRACHLOROETHYLENE

TOTAL

(UG/L)

(34475)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-DICHLOROPROPANE

TOTAL

(UG/L)

(34541)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

DI-NOCTYL

PHT HALATE

TOTAL

(UG/L)

(34596)

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

1-19
07263592 - UNIVERSITY SHOPPING MALL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

2,4-DICHLOROPHENOL

TOTAL

(UG/L)

(34601)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

4,6-

DINITRO

-ORTHOCRESOL

TOTAL

(UG/L)

(34657)

<30.0

<30.0

<30.0

<30.0

<30.0

<30.0

DI-NBUTYL

PHT HALATE

TOTAL

(UG/L)

(39110)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

CHLORDANE,

TOTAL

(UG/L)

(39350)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

2,4-DIMETHYLPHENOL

TOTAL

(UG/L)

(34606)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

DICHLORODIFLUOROMETHANE

TOTAL

(UG/L)

(34668)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZIDINE

TOTAL

(UG/L)

(39120)

<40.0

<40.0

<40.0

<40.0

<40.0

<40.0

DIELDRIN

TOTAL

(UG/L)

(39380)

<0.020

<0.020

<0.020

<0.020

<0.020

<0.020

2,4-DINITROTOLUENE

TOTAL

(UG/L)

(34611)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

PHENOL

(C6H50H)

TOTAL

(UG/L)

(34694)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

VINYL

CHLORIDE

TOTAL

(UG/L)

(39175)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

ENDRIN

WATER

UNFLTRD

REC

(UG/L)

(39390)

<0.060

<0.060

<0.060

<0.060

<0.060

<0.060

2,4,-

DINITROPHENOL

TOTAL

(UG/L)

(34616)

<20.0

<20.0

<20.0

<20.0

<20.0

<20.0

NAPHTHALENE

TOTAL

(UG/L)

(34696)

<5.0

<5.0

<0.2

<5.0

<5.0

<5.0

TRICHLORETHYLENE

TOTAL

(UG/L)

(39180)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

HEPTACHLOR,

TOTAL

(UG/L)

(39410)

<0.030

<0.030

<0.030

<0.030

<0.030

<0.030

2,4,6-

TRICHLOROPHENOL

TOTAL

(UG/L)

(34621)

<20.0

<20.0

<20.0

<20.0

<20.0

<20.0

TRANS1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34699)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

P,P'

DOT,

TOTAL

(UG/L)

(39300)

<0.10

<0.10

<0.10

<0.10

<0.10

<0.10

HEPTACHLOR

EPOXIDE

TOTAL

(UG/L)

(39420)

<0.80

<0.80

<0.80

<0.80

<0.80

<0.80

2,6-DINITROTOLUENE

TOTAL

(UG/L)

(34626)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

CIS

1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34704)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

P,P'

ODD,

TOTAL

(UG/L)

(39310)

<0.10

<0.10

<0.10

<0.10

<0.10

<0.10

LINDANE

TOTAL

(UG/L)

(39340)

<0.030

<0.030

<0.030

<0.030

<0.030

<0.030

3,3'-

DICHLOROBENZIDINE

TOTAL

(UG/L)

(34631)

<20.0

<20.0

<20.0

<20.0

<20.0

<20.0

PENTACHLOROPHENOL

TOTAL

(UG/L)

(39032)

<30.0

<30.0

<30.0

<30.0

<30.0

<30.0

P,P

DDE,

TOTAL

(UG/L)

(39320)

<0.04

<0.04

<0.04

<0.04

<0.04

<0.04

TOXAPHENE,

TOTAL

(UG/L)

(39400)

<2

<2

<2

<2

<2

<2

4-

BROMOPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34636)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

CHLORDANE

CIS

WATER

WHOLE

TOTAL

(UG/L)

(39062)

<0.10

<0.10

<0.10

<0.10

<0.10

<0.10

ALDRIN

TOTAL

(UG/L)

(39330

<0.040

<0.040

<0.040

<0.040

<0.040

<0.040

AROCLOR

1016

PCB

TOTAL

(UG/L)

(34671)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

4-

CHLOROPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34641)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

CHLORDANE

TRANS

WATER

WHOLE

TOTAL

(UG/L)

(39065)

<0.10

<0.10

<0.10

<0.10

<0.10'

<0.10

ALPHA

BHC

TOTAL

(UG/L)

(39337)

<0.03

<0.03

<0.030

<0.030

<0.03

<0.03

AROCLOR

1221

PCB

TOTAL

(UG/L)

(39488)

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

4-

NITROPHENOL

TOTAL

(UG/L)

(34646)

<30.0

<30.0

<30.0

<30.0

<30.0

<30.0

BIS (2-

ETHYL

HEXYL

PHT HALATE

TOTAL

(UG/L)

(39100)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

BETA

BENDENE

HEXACHLORIDE

TOTAL

(UG/L)

(39338)

<0.03

<0.03

<0.03

<0.03

<0.03

<0.03

AROCLOR

1232

PCB

TOTAL

(UG/L)

(39492)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

1-20
07263592 - UNIVERSITY SHOPPING MALL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

DATE TIME

JULY 1992 

03. 0250 

21. 1745

MAY 1993 

01. 1635

18. 

OCT 

18. 

20.

1308

0430

0420

AROCLOR

1242

PCB

TOTAL

(UG/L)

(39496)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

2,2-DI

CHLOROPROPANE

WAT, WH

TOTAL

(UG/L)

(77170)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

N-BUTYL

WATER

UNFLTRD

REC

(UG/L)

(77342)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

METHYL

ETHER

TERTBUTYL

WAT UNF

REC

(UG/L)

(78032)

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

AROCLOR

1248

PCB

TOTAL

(UG/L)

(39500)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

1,3-DICHLOROPROPANE

WAT. WH

TOTAL

(UG/L)

(77173)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

BENZENE

SEC

BUTYLWATER

UNFLTRD

REC

(UG/L)

(77350)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

XYLENE

WATER

UNFLTRD

REC

(UG/L)

(81551)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

AROCLOR

1254

PCB

TOTAL

(UG/L)

(39504)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

PSEUDOCUMENE

WATER

UNFLTRD

REC

(UG/L)

(77222)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

BENZENE

TERTBUTYLWATER

UNFLTRD

REC

(UG/L)

(77353)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

BROMOBENZENE

WATER,

WHOLE,

TOTAL

(UG/L)

(81555)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

AROCLOR

1260

PCB

TOTAL

(UG/L)

(39508)

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1

ISOPROP YLBENZENE

WATER

WHOLE

REC

(UG/L)

(77223)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

P-ISOPROPYLTOLUENE

WATER

WHOLE

REC

(UG/L)

(77356)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

DIBROMO

CHLOROPROPANE

WATER

WHOLE

TOT . REC

(UG/L)

(82625)

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

HEXACHLOROBENZENE

TOTAL

(UG/L)

(39700)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

BENZENE

N-PROPY

WATER

UNFLTRD

REC

(UG/L)

(77224)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

123-TRI

CHLOROPROPANE

WATER

WHOLE

TOTAL

(UG/L)

(77443)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,2-DIPHENYLHYDRAZINE

WATER

TOT. REC

(UG/L)

(82626)

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

HEXACHLOROBUTADIENE

TOTAL

(UG/L)

(39702)

<5.0

<5.0

<0.2

<5.0

<5.0

<5.0

MESITYLENE

WATER

UNFLTR

REC

(UG/L)

(7722

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

ETHANE,

1112-

TETRACHLOROWAT UNF

REC

(UG/L)

(77562)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

OIL AND

GREASE,

TOTAL

RECOV.

GRAVIMETRIC

(MG/L)

(00556)

<1

<1

1

1

<1

<1

CIS-1,2

-DICHLOROETHENE

WATER

TOTAL

(UG/L)

(77093)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

0-

CHLOROTOLUENE

WATER

WHOLE

TOTAL

(UG/L)

(77275)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,2,3-

TRICHLORO

BENZENE

WAT, WH

REC

(UG/L)

(77613)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

STYRENE

TOTAL

(UG/L)

(77128)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

TOLUENE

P-CHLOR

WATER

UNFLTRD

REC

(UG/L)

(77277)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

1,2-

DIBROMO

ETHANE

WATER

WHOLE

TOTAL

(UG/L)

(77651)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

1,1-DI

CHLOROPROPENE,

WAT, WH

TOTAL

(UG/L)

(77168)

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

METHANE

BROMO

CHLOROWAT

UNFLTRD

REC

(UG/L)

(77297)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

FREON113

WATER

UNFLTRD

REC

(UG/L)

(77652)

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

1-21
07263602 - EAST INDUSTRIAL AREA STORMWATER DRAIN AT LITTLE ROCK 

WATER-QUALITY DATA

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

AGENCY

COLLECTING

SAMPLE

(CODE

NUMBER)

(00027)

80513

80513

80513

MAGNESIUM,

DISSOLVED

(MG/L

AS MG)

(00925)

0.88

1.0

0.79

SOLIDS,

DISSOLVED

(TONS

PER

AC- FT)

(70303)

0.08

0.10

0.07

PHOSPHORUS

DISSOLVED

(MG/L

AS P)

(00666)

0.290

0.430

0.440

NICKEL,

TOTAL

RECOVERABLE

(UG/L

AS NI)

(01067)

5

6

5

AGENCY

ANALYZING

SAMPLE

(CODE

NUMBER)

(00028)

80020

80020

80020

SODIUM,

DISSOLVED

(MG/L

AS NA)

(00930)

1.6

2.1

1.6

RESIDUE

TOTAL

AT 105

DEC. C,

SUSPENDED

(MG/L)

(00530)

120

56

59

CARBON,

ORGANIC

TOTAL

(MG/L

AS C)

(00680)

46

38

34

SELENIUM,

TOTAL

(UG/L

AS SE)

(01147)

<1

1

1

SPECIFIC

CONDUCTANCE

LAB

(US/CM)

(90095)

68

83

69

SODIUM

ADSORPTION

RATIO

(00931)

0.2

0.2

0.2

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

(00613)

0.050

0.100

0.100

ARSENIC

TOTAL

(UG/L

AS AS)

(01002)

1

1

2

SILVER,

TOTAL

RECOVERABLE

(UG/L

AS AG)

(01077)

<1

<1

<1

PH

WATER

WHOLE

LAB

(STANDARD

UNITS)

(00403)

6.7

6.4

6.2

SODIUM

PERCENT

(00932)

12

13

13

NITROGEN,

N02+N03

DISSOLVED

(MG/L

AS N)

(00631)

0.480

0.870

0.840

BERYLLIUM,

TOTAL

RECOVERABLE

(UG/L

AS BE)

(01012)

<10

<10

<10

ZINC,

TOTAL

RECOVERABLE

(UG/L

AS ZN)

(01092)

250

240

230

OXYGEN

DEMAND,

BIOCHEMICAL,

5 DAY

(MG/L)

(00310)

>32

36

14

POTASSIUM,

DISSOLVED

(MG/L

AS K)

(00935)

6.0

7.1

6.4

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

(00608)

0.610

0.920

0.990

CADMIUM

TOTAL

RECOVERABLE

(UG/L

AS CD)

(01027)

<1

<1

<1

CYANIDE

TOTAL

(MG/L

AS CN)

(00720)

<0.010

<0.010

<0.010

OXYGEN

DEMAND,

CHEMICAL

(HIGH

LEVEL)

(MG/L)

(00340)

160

110

94

ALKALINITY

LAB

(MG/L

AS

CAC03)

(90410)

32

32

37

NITROGEN,

ORGANIC

TOTAL

(MG/L

AS N)

(00605)

5.0

4.1

3.3

CHROMIUM,

TOTAL

RECOVERABLE

(UG/L

AS CR)

(01034)

4

4

3

DIBROMOMETHANE

WATER

WHOLE

RECOVER

(UG/L)

(30217)

<0.2

<0.2

<0.2

COLIFORM,

FECAL,

0.7

UM-MF

(COLS./

100 ML)

(31625)

>2300

K6100

K2000

SULFATE

DISSOLVED

(MG/L

AS S04)

(00945)

3.8

7.5

5.7

NITROGEN,

TOTAL

(MG/L

AS N)

(00600)

6.1

5.9

5.1

COPPER,

TOTAL

RECOVERABLE

(UG/L

AS CU)

(01042)

15

14

12

DICHLOROBROMOMETHANE

TOTAL

(UG/L)

(32101)

<0.2

<0.2

<0.2

STREPTOCOCCI

FECAL,

KF AGAR

(COLS.

PER

100 ML)

(31673)

E1300

620000

K29000

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

(00940)

1.2

2.5

1.6

NITROGEN,

NITRATE

TOTAL

(MG/L

AS N)

(00620)

0.430

0.770

0.740

LEAD,

TOTAL

RECOVERABLE

(UG/L

AS PB)

(01051)

48

20

20

CARBONTETRACHLORIDE

TOTAL

(UG/L)

(32102)

<0.2

<0.2

<0.2

HARDNESS

TOTAL

(MG/L

AS

CAC03)

(00900)

18

20

15

SOLIDS,

RESIDUE

AT 180

DEC. C

DISSOLVED

(MG/L)

(70300)

56

72

51

NITROGEN, AMMONIA +

ORGANIC

TOTAL

(MG/L

AS N)

(00625)

5.6

5.0

4.3

THALLIUM,

TOTAL

(UG/L

AS TL)

(01059)

<5

<5

<5

1,2-DICHLOROETHANE

TOTAL

(UG/L)

(32103)

<0.2

<0.2

<0.2

CALCIUM

DISSOLVED

(MG/L

AS CA)

(00915)

5.8

6.5

4.7

SOLIDS,

SUM OF

CONSTITUENTS,

DISSOLVED

(MG/L)

(70301)

41

51

48

PHOSPHORUS

TOTAL

(MG/L

AS P)

(00665)

2.00

0.980

0.750

MERCURY

TOTAL

RECOVERABLE

(UG/L

AS HG)

(71900)

<0.10

<0.10

0.20

BROMOFORM

TOTAL

(UG/L)

(32104)

<0.2

<0.2

<0.2

1-22
07263602 - EAST INDUSTRIAL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

CHLORODIBROMOMETHANE

TOTAL

(UG/L)

(32105)

CHLOROFORM

TOTAL

(UG/L)

(32106)

PHENOLS

TOTAL

(UG/L)

(32730)

TOLUENE

TOTAL

(UG/L)

(34010)

BENZENE

TOTAL

(UG/L)

(34030)

ACENAP HTHYLENE

TOTAL

(UG/L)

(34200)

ACENAPHTHENE

TOTAL

(UG/L)

(34205)

ACROLEIN

TOTAL

(UG/L)

(34210)

ACRYLONITRILE

TOTAL

(UG/L)

(34215)

ANTHRACENE

TOTAL

(UG/L)

(34220)

NOV 1993

16.

DEC

02.

1255

1000

<0.2

<0.2

<0.2

0.5

6

10

0.3

1.5

<0.2

<0.2

<5.0

<5.0

<5.0

<5.0

<20

<20

<20

<20

<5.0

<5.0

JAN 1994

11.

DATE

0700

TIME

<0.2

BENZO B

FLUORANTHENE

TOTAL

(UG/L)

(34230)

<0.2

BENZO K

FLUORANTHENE

TOTAL

(UG/L)

(34242)

6

BENZOAPYRENE

TOTAL

(UG/L)

(34247)

1.5

DELTA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(34259)

<0.2

BIS

2-

CHLOROETHYL

ETHER

TOTAL

(UG/L)

(34273)

<5.0

BIS

(2-

CHLOROETHOXY)

METHANE

TOTAL

(UG/L)

(34278)

<5.0

BIS (2-

CHLOROISOPROPYL)

ETHER

TOTAL

(UG/L)

(34283)

<20

N-BUTYL

BENZYL

PHT HALATE

TOTAL

(UG/L)

(34292)

<20

CHLOROBENZENE

TOTAL

(UG/L)

(34301)

<5.0

CHLOROETHANE

TOTAL

(UG/L)

(34311)

NOV 1993

16.

DEC

02.

1255

1000

<10.0

<10.0

<10.0

<10.0

<10.0

<10.0

<0.09

<0.09

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<0.20

<0.20

<0.2

<0.2

JAN 1994

11.

DATE

0700

TIME

<10.0

CHRYSENE

TOTAL

(UG/L)

(34320)

<10.0

DIETHYL

PHT HALATE

TOTAL

(UG/L)

(34336)

<10.0

DIMETHYL

PHTHALATE

TOTAL

(UG/L)

(34341)

<0.09

ENDOSULFAN

SULFATE

TOTAL

(UG/L)

(34351)

<5.0

ENDOSULFAN

BETA

TOTAL

(UG/L)

(34356)

<5.0

ENDOSULFANI

WATER

WHOLE

REC

(UG/L)

(34361)

<5.0

ENDRIN

ALDEHYDE

TOTAL

(UG/L)

(34366)

<5.0

ETHYLBENZENE

TOTAL

(UG/L)

(34371)

<0.20

FLUORANTHENE

TOTAL

(UG/L)

(34376)

<0.2

FLUORENE

TOTAL

(UG/L)

(34381)

NOV 1993

16.

DEC

02.

1255

1000

<10.0

<10.0

<5.0

<5.0

<5.0

<5.0

<0.60

<0.60

<0.04

<0.04

<0.10

<0.10

<0.20

<0.20

<0.2

<0.2

<5.0

<5.0

<5.0

<5.0

JAN 1994

11.

DATE

0700

TIME

<10.0

HEXACHLOROCYCLOPENTADIENE

TOTAL

(UG/L)

(34386)

<5.0

HEXACHLOROETHANE

TOTAL

(UG/L)

(34396)

<5.0

INDENO

(1,2,3-

CD)

PYRENE

TOTAL

(UG/L)

(34403)

<0.60

ISOPHORONE

TOTAL

(UG/L)

(34408)

<0.04

METHYLBROMIDE

TOTAL

(UG/L)

(34413)

<0.10

METHYLCHLORIDE

TOTAL

(UG/L)

(34418)

<0.20

METHYLENE

CHLORIDE

TOTAL

(UG/L)

(34423)

<0.2

NNITROSODI-NPROPYLAMINE

TOTAL

(UG/L)

(34428)

<5.0

N-NITRO

-SODIPHENYLAMINE

TOTAL

(UG/L)

(34433)

<5.0

N-NITRO

-SODIMETHYLAMINE

TOTAL

(UG/L)

(34438)

NOV 1993

16.

DEC

02.

1255

1000

<5.0

<5.0

<5.0

<5.0

<10.0

<10.0

<5.0

<5.0

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

JAN 1994

11.

DATE

0700

TIME

<5.0

NITROBENZENE

TOTAL

(UG/L)

(34447)

<5.0

PARACHLOROMETA

CRESOL

TOTAL

(UG/L)

(34452)

<10.0

PHENANTHRENE

TOTAL

(UG/L)

(34461)

<5.0

PYRENE

TOTAL

(UG/L)

(34469)

<0.2

TETRACHLOROETHYLENE

TOTAL

(UG/L)

(34475)

<0.2

TRICHLOROFLUOROMETHANE

TOTAL

(UG/L)

(34488)

<0.2

1,1-DICHLOROETHANE

TOTAL

(UG/L)

(34496)

<5.0

1,1-DICHLOROETHYLENE

TOTAL

(UG/L)

(34501)

<5.0

1,1,1-

TRICHLOROETHANE

TOTAL

(UG/L)

(34506)

<5.0

1,1,2-

TRICHLOROETHANE

TOTAL

(UG/L)

(34511)

NOV 1993

16.

DEC

02.

1255

1000

<5.0

<5.0

<30.0

<30.0

<5.0

<5.0

<5.0

<5.0

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

<0.2

JAN 1994

11. 0700 <5.0 <30.0 <5.0 <5.0 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2

1-23
07263602 - EAST INDUSTRIAL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

DATE TIME

NOV 1993

16. 1255 

DEC

02. 1000 

JAN 1994

11. 0700

ETHANE,

1,1,2,2

TETRACHLOROWAT UNF

REC

(UG/L)

(34516)

<0.2

<0.2

<0.2

2-

CHLOROETHYLVINYLETHER

TOTAL

(UG/L)

(34576)

<1.0

<1.0

<1.0

2,6-DINITROTOLUENE

TOTAL

(UG/L)

(34626)

<5.0

<5.0

<5.0

CIS

1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34704)

<0.2

<0.2

<0.2

P,P'

ODD,

TOTAL

(UG/L)

(39310)

<0.10

<0.10

<0.10

BENZOGH

I PERYL

ENE1,12

-BENZOP

ERYLENE

TOTAL

(UG/L)

(34521)

<10.0

<10.0

<10.0

2-

CHLORONAPHTHALENE

TOTAL

(UG/L)

(34581)

<5.0

<5.0

<5.0

3,3'-

DICHLOROBENZIDINE

TOTAL

(UG/L)

(34631)

<20.0

<20.0

<20.0

PENTACHLOROPHENOL

TOTAL

(UG/L)

(39032)

<30.0

<30.0

<30.0

P,P'

DDE,

TOTAL

(UG/L)

(39320)

<0.04

<0.04

<0.04

BENZO A

ANTHRAC

ENE1,2-

BENZANT

HRACENE

TOTAL

(UG/L)

(34526)

<10.0

<10.0

<10.0

2-

CHLOROPHENOL

TOTAL

(UG/L)

(34586)

<5.0

<5.0

<5.0

4-

BROMOPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34636)

<5.0

<5.0

<5.0

CHLORDANE

CIS

WATER

WHOLE

TOTAL

(UG/L)

(39062)

<0.10

<0.10

<0.10

ALDRIN,

TOTAL

(UG/L)

(39330)

<0.040

<0.040

<0.040

BENZENE

0-

CHLOROWATER

UNFLTRD

REC

(UG/L)

(34536)

<5.0

<5.0

<5.0

2-

NITROPHENOL

TOTAL

(UG/L)

(34591)

<5.0

<5.0

<5.0

4-

CHLOROPHENYL

PHENYL

ETHER

TOTAL

(UG/L)

(34641)

<5.0

<5.0

<5.0

CHLORDANE

TRANS

WATER

WHOLE

TOTAL

(UG/L)

(39065)

<0.10

<0.10

<0.10

ALPHA

BHC

TOTAL

(UG/L)

(39337)

<0.03

<0.03

<0.03

1,2-DICHLOROPROPANE

TOTAL

(UG/L)

(34541)

<0.2

<0.2

<0.2

DI-N-'

OCTYL

PHTHALATE

TOTAL

(UG/L)

(34596)

<10.0

<10.0

<10.0

4-

NITROPHENOL

TOTAL

(UG/L)

(34646)

<30.0

<30.0

<30.0

BIS (2-

ETHYL

HEXYL)

PHTHALATE

TOTAL

(UG/L)

(39100)

<5.0

<5.0

<5.0

BETA

BENZENE

HEXACHLORIDE

TOTAL

(UG/L)

(39338)

<0.03

<0.03

<0.03

1,2-

TRANSDI

CHLOROETHENE

TOTAL

(UG/L)

(34546)

<0.2

<0.2

<0.2

2,4-DICHLOROPHENOL

TOTAL

(UG/L)

(34601)

<5.0

<5.0

<5.0

4,6-

DINITRO

-ORTHOCRESOL

TOTAL

(UG/L)

(34657)

<30.0

<30.0

<30.0

DI-NBUTYL

PHT HALATE

TOTAL

(UG/L)

(39110)

<5.0

<5.0

<5.0

CHLORDANE,

TOTAL

(UG/L)

(39350)

<0.1

<0.1

<0.1

BENZENE

1,2,4-

TRICHLOROWAT UNF

REC

(UG/L)

(34551)

<5.0

<5.0

<5.0

2,4-DIMETHYLPHENOL

TOTAL

(UG/L)

(34606)

<5.0

<5.0

<5.0

DICHLORODIFLUOROMETHANE

TOTAL

(UG/L)

(34668)

<0.2

<0.2

<0.2

BENZIDINE

TOTAL

(UG/L)

(39120)

<40.0

<40.0

<40.0

DIELDRIN

TOTAL

(UG/L)

(39380)

<0.020

<0.020

<0.020

1,2,5,6

-DIBENZ

-ANTHRA

-CENE

TOTAL

(UG/L)

(34556)

<10.0

<10.0

<10.0

2,4-DINITROTOLUENE

TOTAL

(UG/L)

(34611)

<5.0

<5.0

<5.0

PHENOL

(C6H50H)

TOTAL

(UG/L)

(34694)

<5.0

<5.0

<5.0

VINYL

CHLORIDE

TOTAL

(UG/L)

(39175)

<0.2

<0.2

<0.2

ENDRIN

WATER

UNFLTRD

REC

(UG/L)

(39390)

<0.060

<0.060

<0.060

BENZENE

1,3-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34566)

<5.0

<5.0

<5.0

2,4,-

DINITROPHENOL

TOTAL

(UG/L)

(34616)

<20.0

<20.0

<20.0

NAPHTHALENE

TOTAL

(UG/L)

(34696)

<5.0

<5.0

<5.0

TRICHLOROETHYLENE

TOTAL

(UG/L)

(39180)

<0.2

<0.2

<0.2

HEPTACHLOR,

TOTAL

(UG/L)

(39410)

<0.030

<0.030

<0.030

BENZENE

1,4-DICHLOROWATER

UNFLTRD

REC

(UG/L)

(34571)

<5.0

<5.0

<5.0

2,4,6-

TRICHLOROPHENOL

TOTAL

(UG/L)

(34621)

<20.0

<20.0

<20.0

TRANS1,3-DICHLOROPROPENE

TOTAL

(UG/L)

(34699)

<0.2

<0.2

<0.2

P,PDOT,

TOTAL

(UG/L)

(39300)

<0.10

<0.10

<0.10

HEPTACHLOR

EPOXIDE

TOTAL

(UG/L)

(39420)

<0.80

<0.80

<0.80

1-24
07263602 - EAST INDUSTRIAL AREA STORMWATER DRAIN AT LITTLE ROCK continued

WATER-QUALITY DATA

DATE

NOV

16

DEC

02

JAN

11

DATE

NOV

16

DEC

02

JAN

11

DATE

TIME

1993

. 1255

. 1000

1994

. 0700

TIME

1993

. 1255

. 1000

1994

. 0700

TIME

LINDANE

TOTAL

(UG/L)

(39340)

<0.030

<0.030

<0.030

HEXACHLOROBUTADIENE

TOTAL

(UG/L)

(39702)

<5.0

<5.0

<5.0

0-

CHLOROTOLUENE

WATER

WHOLE

TOTAL

(UG/L)

(77275)

TOXAPHENE,

TOTAL

(UG/L)

(39400)

<2

<2

<2

CIS-1,2

-DICHLOROETHENE

WATER

TOTAL

(UG/L)

(77093)

<0.2

<0.2

<0.2

TOLUENE

P-CHLOR

WATER

UNFLTRD

REC

(UG/L)

(77277)

AROCLOR

1016

PCB

TOTAL

(UG/L)

(34671)

<0.1

<0.1

<0.1

STYRENE

TOTAL

(UG/L)

(77128)

<0.2

<0.2

<0.2

METHANE

BROMO

CHLOROWAT

UNFLTRD

REC

(UG/L)

(77297)

AROCLOR

1221

PCB

TOTAL

(UG/L)

(39488)

<1.0

<1.0

<1.0

1,1-DI

CHLOROPROPENE,

WAT, WH

TOTAL

(UG/L)

(77168)

<0.2

<0.2

<0.2

BENZENE

N-BUTYL

WATER

UNFLTRD

REC

(UG/L)

(77342)

AROCLOR

1232

PCB

TOTAL

(UG/L)

(39492)

<0.1

<0.1

<0.1

2,2-DI

CHLOROPROPANE

WAT, WH

TOTAL

(UG/L)

(77170)

<0.2

<0.2

<0.2

BENZENE

SEC

BUTYLWATER

UNFLTRD

REC

(UG/L)

(77350)

AROCLOR

1242

PCB

TOTAL

(UG/L)

(39496)

<0.1

<0.1

<0.1

1,3-DICHLOROPROPANE

WAT. WH

TOTAL

(UG/L)

(77173)

<0.2

<0.2

<0.2

BENZENE

TERTBUTYLWATER

UNFLTRD

REC

(UG/L)

(77353)

AROCLOR

1248

PCB

TOTAL

(UG/L)

(39500)

<0.1

<0.1

<0.1

PSEUDOCUMENE

WATER

UNFLTRD

REC

(UG/L)

(77222)

<0.20

<0.20

<0.20

P-ISOPROPYLTOLUENE

WATER

WHOLE

REC

(UG/L)

(77356)

AROCLOR

1254

PCB

TOTAL

(UG/L)

(39504)

<0.1

<0.1

<0.1

ISOPROPYLBENZENE

WATER

WHOLE

REC

(UG/L)

(77223)

<0.20

<0.20

<0.20

123-TRI

CHLOROPROPANE

WATER

WHOLE

TOTAL

(UG/L)

(77443)

AROCLOR

1260

PCB

TOTAL

(UG/L)

(39508)

<0.1

<0.1

<0.1

BENZENE

N-PROPY

WATER

UNFLTRD

REC

(UG/L)

(77224)

<0.20

<0.20

<0.20

ETHANE,

1112-

TETRACHLOROWAT UNF

REC

(UG/L)

(77562)

HEXACHLOROBENZENE

TOTAL

(UG/L)

(39700)

<5.0

<5.0

<5.0

MESITYLENE

WATER

UNFLTRD

REC

(UG/L)

(77226)

<0.20

<0.20

<0.20

1,2,3-

TRICHLORO

BENZENE

WAT, WH

REC

(UG/L)

(77613)

NOV 1993

16

DEC

02

. 1255

. 1000

<0.2

<0.2

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.2

<0.2

<0.2

<0.2

<0.20

<0.20

JAN 1994

11

DATE

. 0700

TIME

<0.2

1,2-

DIBROMO

ETHANE

WATER

WHOLE

TOTAL

(UG/L)

(77651)

<0.20

FREON113

WATER

UNFLTRD

REC

(UG/L)

(77652)

<0.20

METHYL

ETHER

TERTBUTYL

WAT UNF

REC

(UG/L)

(78032)

<0.20

XYLENE

WATER

UNFLTRD

REC

(UG/L)

(81551)

<0.20

BROMOBENZENE

WATER,

WHOLE,

TOTAL

(UG/L)

(81555)

<0.20

DIBROMO

CHLOROPROPANE

WATER

WHOLE

TOT. REC

(UG/L)

(82625)

<0.20

1,2-DIPHENYLHYDRAZINE

WATER

TOT. REC

(UG/L)

(82626)

<0.2

OIL AND

GREASE,

TOTAL

RECOV.

GRAVIMETRIC

(MG/L)

(00556)

<0.2 <0.20

NOV 1993

16

DEC

02

. 1255

. 1000

<0.2

<0.2

<0.5

<0.5

<1.0

<1.0

<0.20

<0.20

<0.2

<0.2

<1.0

<1.0

<5.0

<5.0

2

2

JAN 1994

11 . 0700 <0.2 <0.5 <1.0 <0.20 <0.2 <1.0 <5.0 2

U.S. GOVERNMENT PRINTING OFFICE: 1995 655-177/00018 1-25