An Assessment of Pesticides

in the

Upper Wabash River Basin

Office of Water Quality

Assessment Branch

February 2001

IDEM/032/02/024/2001
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

i

An Assessment of Pesticides

in the

Upper Wabash River Basin

Author

Ryan McDuffee, Environmental Scientist

Compilation and development of the final report was the primary responsibility of the Surveys Section

Arthur C. Garceau, Surveys Section Chief

INDIANA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT

OFFICE OF WATER QUALITY

ASSESSMENT BRANCH

SURVEYS SECTION

IDEM 032/02/024/2001

February 2001
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

ii

NOTICE AND DISCLAIMER:

The Indiana Department of Environmental Management intends use of this document for the facilitation of

information exchange. Mention of pesticide trade names or other commercial products does not constitute

endorsement or recommendation of use.

When citing this document:

McDuffee R. 2001. An Assessment of Pesticide Concentrations in the Upper Wabash River

Basin. Indiana Department of Environmental Management, Office of Water Quality, Assessment

Branch, Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

iii

Abstract

This study continues IDEM’s Pesticide Monitoring Program. Surface water samples from the

Upper Wabash River Basin were analyzed for 142 pesticides, pesticide degradation products, and

urban chemicals during April 1 through July 31, 1998. This time period was selected to

represent the season when pesticide application is occurring most often. There were 22 sampling

sites located along the main stem of the Wabash River and eight tributaries. The test method

used to analyze these chemicals was SAS5 Modified EPA Test Method 525.2. All sampling sites

were sampled once a week for 15 weeks resulting in the collection of approximately 330 water

samples. Of the 142 chemicals analyzed 110 are pesticides or 77.4%. Of these 110 pesticides

only 19 were detected over their respective detection limit. Herbicides represented 13 of the

pesticides detected in the surface water or 68.4%. Atrazine, metolachlor, and acetochlor were the

most represented pesticides. The maximum concentrations recorded for a single sample for the

three herbicides were:

ß atrazine, 36 ug/L on June 11 at Mississinewa River near Ridgeville;

ß metolachlor, 41 ug/L on June 11 at the same location;

ß acetochlor, 14 ug/L on May 20 at Mississinewa River near Ridgeville, and May 21 at Eel

River near Logansport.

The average concentration during the 15-week sampling season for atrazine, metolachlor, and

acetochlor was, respectively, 3.31 ug/L, 2.17 ug/L, and 1.04 ug/L. With no surface water

standards set for these pesticides, comparison to the Drinking Water Standards maximum

contaminant level (MCL) seems appropriate. The MCL set for the three herbicides are atrazine,

3.0 ug/L; metolachlor, no MCL set; and acetochlor, 2.0 ug/L. 

Using U.S. Geological Survey gaging station flow data and mathematical calculations, total

pounds of pesticide loading was determined. Using Geographic Information Systems to define

crop acreage in each watershed, application rates of pesticide, and the pesticide loading in

pounds, an estimate of percent runoff was determined. Percent runoff for atrazine, metolachlor,

and acetochlor was, in respective order, 1.14%, 1.20%, and 0.49%.

Three surface water intakes for drinking water are located in this watershed basin. They are

located on Center Lake at Warsaw, Eel River at Logansport, and Wildcat Creek at Kokomo. It is

envisioned that information gathered here on the occurrence of pesticides in the Upper Wabash

River Basin will be useful for IDEM’s Surface Water Quality Monitoring newly implemented

Source Water Protection Program to protect the environment and human health.
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

iv
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

v

Table of Contents

INTRODUCTION ...................................................................................................................................................... 1

STUDY AREA............................................................................................................................................................. 3

LOCATION................................................................................................................................................................. 3

GEOLOGY.................................................................................................................................................................. 3

LAND USE................................................................................................................................................................. 3

FLOW & DRAINAGE .................................................................................................................................................. 3

EROSION POTENTIAL ................................................................................................................................................. 4

MATERIALS AND METHODS ............................................................................................................................... 5

SAMPLING LOCATION................................................................................................................................................ 5

SAMPLING METHODOLOGY ....................................................................................................................................... 6

CHEMICAL ANALYSIS................................................................................................................................................ 6

QUALITY ASSURANCE MEASUREMENTS.................................................................................................................... 7

Precision ............................................................................................................................................................. 7

Accuracy.............................................................................................................................................................. 7

SELECTED PESTICIDE NARRATIVES.............................................................................................................. 10

Atrazine ............................................................................................................................................................. 11

Metolachlor....................................................................................................................................................... 12

Acetochlor......................................................................................................................................................... 12

Glyphosate ........................................................................................................................................................ 14

Cyanazine.......................................................................................................................................................... 14

Pendimethalin ................................................................................................................................................... 14

Terbufos ............................................................................................................................................................ 15

2,4-D ................................................................................................................................................................. 15

Chlorpyrifos ...................................................................................................................................................... 16

Clomazone......................................................................................................................................................... 16

RESULTS AND DISCUSSIONS ............................................................................................................................. 17

GENERAL OBSERVATIONS ....................................................................................................................................... 17

LOADING CALCULATIONS........................................................................................................................................ 17

ESTIMATED HERBICIDES USAGE ON CORN CROP..................................................................................................... 22

ESTIMATED PESTICIDE USAGE ON SOYBEAN CROPS................................................................................................ 24

RUNOFF CALCULATIONS ......................................................................................................................................... 25

TREND ANALYSIS.................................................................................................................................................... 27

DRINKING WATER CONCERNS................................................................................................................................. 29

RECOMMENDATIONS AND CONCLUSIONS.................................................................................................. 30

LITERATURE CITED............................................................................................................................................. 31
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

vi

LIST OF FIGURES

FIGURE 1 PERCENTAGE OF POUNDS OF SELECTED PESTICIDES APPLIED TO CORN AND SOYBEANS FOR THE STATE OF

INDIANA............................................................................................................................................................. 11

FIGURE 2 EXAMPLE OF THE TRAPEZOID RULE............................................................................................................. 18

LIST OF TABLES

TABLE 1 UPPER WABASH RIVER BASIN PESTICIDES SAMPLING LOCATIONS AT USGS GAUGING STATIONS.................. 5

TABLE 2 PRECISION MEASURED IN DUPLICATE SAMPLES .............................................................................................. 8

TABLE 3 ACCURACY MEASURED IN SPIKED SAMPLES ................................................................................................. 9

TABLE 4 MOST COMMONLY USED PESTICIDES AND ASSOCIATED INFORMATION......................................................... 10

TABLE 5 LOADING IN POUNDS PER DAY OF ATRAZINE FOR ELEVEN SELECTED SAMPLE SITES..................................... 19

TABLE 6 LOADING IN POUNDS OF METOLACHLOR FOR ELEVEN SELECTED SAMPLE SITES ........................................... 20

TABLE 7 LOADING IN POUNDS OF ACETOCHLOR FOR ELEVEN SELECTED SAMPLE SITES.............................................. 21

TABLE 8 ESTIMATED HERBICIDE USAGE ON CORN CROPS PER CROP YEAR................................................................. 23

TABLE 9 ESTIMATED HERBICIDE USAGE ON SOYBEAN CROPS PER CROP YEAR........................................................... 24

TABLE 10 PERCENTAGE OF CONTRIBUTING TRIBUTARIES TO THE UPPER WABASH RIVER BASIN ................................. 25

TABLE 11 RAINFALL DATA FOR EACH SAMPLING SITE ................................................................................................ 27

TABLE 12 PUBLIC WATER SUPPLY FACILITIES USING SURFACE WATER FROM THE UPPER WABASH RIVER BASIN ..... 29

LIST OF APPENDICES

APPENDIX I MAPS AND SAMPLING LOCATIONS UPPER WABASH RIVER BASIN

APPENDIX II PARAMETER LIST FOR SAS5 MODIFIED METHOD 525.2

APPENDIX III DATA QUALITY ASSESSMENT LEVELS

APPENDIX IV HERBICIDE CONCENTRATIONS AND STREAM FLOWS

APPENDIX V DESCRIPTIVE STATISTICS

APPENDIX VI GRAPHS OF THE VARIATION IN PESTICIDES OVER TIME
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

vii

Acknowledgments

ß The U.S. Geological Survey allowed IDEM access to gaging stations and provided technical

expertise.

ß U.S. EPA Region 5 funded this project through a Clean Water Act, Section 319 Non-point

source grant.

ß Mr. Sean Grady, IDEM OLQ, developed the workplan and collected the samples used in this

study.

ß Mr. Charles Crawford of the USGS provided valuable critical review of a draft copy of this

report.

ß Mr. Scott Dombrowski, I.U. SPEA, provided assistance in editing and publication during an

internship with the Surveys Section.
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

viii
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

1

INTRODUCTION

This pesticide monitoring effort identifies the concentrations and loading of pesticides used in

the Upper Wabash River Basin. The 1998 pesticide monitoring program in ambient water was

conducted with the following objectives in mind:

1. Identify the occurrence and amount of selected pesticides and semi-volatile chemical

compounds in surface waters of the Upper Wabash River Basin.

2. Provide benchmark information for long-term trend analysis and correlation with other

ambient monitoring programs within the State.

3. Determine which tributaries contribute the greatest pesticide load to Upper Wabash River

Basin.

4. Compare pesticides loading from individual sampling sites.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

2
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

3

STUDY AREA

LOCATION

The Wabash River originates in northwestern Ohio. After crossing the Indiana state line near

New Corydon in Jay County, Indiana, it cuts westward across the state; then heads south to

eventually form the border between Indiana and Illinois. For the ease of management, the

Indiana Department of Natural Resources divided the Wabash River into three subbasins. These

three divisions are the upper, middle, and lower subbasins. This project focuses on the Upper

Wabash River Subbasin. This section extends from the Indiana-Ohio border downstream to

include Wildcat Creek near Lafayette. The dimensions for the Upper Wabash River Basin are

approximately 110 miles east-west by 70 miles north-south (Greeman 1994).

GEOLOGY

The Upper Wabash River Basin primarily consists of glacial drift with a few areas of out

cropping Paleozoic bedrock. The bedrock has five apparent classifications: Silurian Dolomite

and Limestone, Devonian and Mississippian Shale, Devonian Limestone and Dolomite,

Mississippian Siltstone and Shale, and Ordovician Shale and Limestone. The majority of the

bedrock is composed primarily of the Silurian Dolomite and Limestone. Layered above the

bedrock are three physiographic units: Tipton Till, Steuben Morainal Lake Area, and the

Kankakee Outwash and Lacustrine Plain. If the Upper Wabash River Subbasin area were

divided equally into a northern and southern half, the southern half would be completely Tipton

Till. Also, located in the southern portion are three major moraines: Wabash, Salamonie, and

Mississinewa Moraines. The northern half is basically split into thirds with the eastern third

being Tipton Till, the middle third being Steuben Morainal Lake area, and the western third

being part of the Kankakee Outwash and Lacustrine Plain (Greeman 1994). The Upper Wabash

River from just downstream of Logansport has a slope of greater than 2.5 feet per mile to less

than 1 foot per mile. Excess sediment loads washed into the Wabash River by the Eel and

Tippecanoe Rivers have caused the loss of the slope (Greeman 1994). The long term annual

precipitation in this region averages 37.5 inches per year (IDNR 1980). The average rainfall total

for the surrounding climate areas of the Upper Wabash River Basin during 1998 was 42.6 inches

(Scheeringa 1999).

LAND USE

The Upper Wabash River Basin contains 20% (7,278 mi2) of Indiana's total land area. The land

area is primarily represented by cropland (92% at 6,695.2 mi2), forests (4% at 293 mi2), and

urban and industrial areas (2.4% at 173 mi2) (USGS 1994).

FLOW & DRAINAGE

The Wabash River drains 32,910 mi2 of Indiana, Illinois, and Ohio, and flows into the Ohio

River and ultimately into the Mississippi River. The Upper Wabash River Basin includes the
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

4

Wabash River from beyond the Indiana-Ohio state line downstream to Lafayette. The Upper

Wabash River Basin drains 7,278 mi2 of which 285 mi2 are in Ohio (Greeman 1994). Some of

the major tributaries of the Upper Wabash River include: Tippecanoe River, Eel River,

Mississinewa River, Salamonie River, Little River, Deer Creek, Pipe Creek, and Wildcat Creek

(IDNR 1980).

EROSION POTENTIAL

The soil erosion potential for the Upper Wabash River area is rated as:

Low 63%

Medium 29%

High 9%

The upper portion of this basin has the least potential for erosion, and the lower portion has the

highest potential (IDNR 1980).
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

5

MATERIALS AND METHODS

SAMPLING LOCATION

Sampling sites were selected because of their association with United States Geological

Survey(USGS) gaging stations. These gaging stations provide instantaneous flow values, which

are needed for determining pesticide loading in streams. A complete list of the sampling sites,

the number assigned to the USGS gaging station, and the individual drainage areas, in square

miles, is included in Table 1.

Table 1 Upper Wabash River Basin Pesticides Sampling Locations at USGS Gaging Stations

Site Station

USGS

Gage #

Drainage

Area mi2

TR-159 Tippecanoe River @ Oswego 3330500 116*

TR-79 Tippecanoe River near Ora 3331500 856

TR-9 Tippecanoe River near Delphi 3333050 1,869

DC-5 Deer Creek near Delphi 3329700 274

WB-311 Wabash River @ Lafayette 3335500 7,278*

WB-354 Wabash River @ Logansport 3329000 3,792*

WB-370 Wabash River @ Peru 3327500 2,700*

WB-387 Wabash River @ Wabash 3325000 1,772*

WB-409 Wabash River @ Huntington 3323500 725*

WB-445 Wabash River @ Linn Grove 3322900 457*

LR8 Little River Near Huntington 3323500 263

ELL-53 Eel River @ No. Manchester 3328000 384*

ELL-7 Eel River Near Logansport 3328500 789

S-30 Salamonie River Near Warren 3324300 425

S-3 Salamonie River @ Dora 3324500 557

MS-100 Mississinewa River near Ridgeville 3325500 143*

MS-36 Mississinewa River @ Marion 3326500 691*

MS-7 Mississinewa River Near Peoria 3327000 818*

PIP-11 Pipe Creek Near Bunker Hill 3327520 159

WC-80 Wildcat Creek Near Jerome 3333450 146

WC-60 Wildcat Creek @ Kokomo 3333700 242

WC-15 Wildcat Creek @ Owasco 3334000 396

WCS-4 S.F. Wildcat Creek Near Lafayette 3334500 243

WC-5 Wildcat Creek Near Lafayette 3335000 794

* Indicates different watershed values than published USGS values as described in the text.

In order to determine the area for specific land uses in each watershed, it was first necessary to

delineate the watershed drainage area for each sampling site. Drainage areas for the sampling
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

6

sites were located at gaging stations listed in this report may differ as much as 1% from

published USGS values. These discrepancies can be attributed to scale differences in the digital

coverage used to delineate the watersheds. Specifically, the portion of the Upper Wabash River

Basin located in Indiana was delineated at the 14-digit HUC scale, while the contributing area in

Ohio was delineated at the 8-digit HUC scale.

Maps displaying the watersheds sampled, sampling locations, stream identity and land usage are

found in Appendix I.

SAMPLING METHODOLOGY

Sampling consisted of collecting surface water grab samples from the center of flow at each

station. The grab samples were collected on a weekly basis, approximately seven days apart. A

sample collection apparatus was fabricated with four inch diameter PVC pipe. Three pieces of

pipe were cut to the size of the sample bottles and were connected together by plastic bolts. This

allowed for the simultaneous collection of duplicate samples and Matrix Spike/Matrix Spike

Duplicate samples during each sampling route. A rope was attached to this apparatus and

lowered from a bridge to collect the samples at each location. The sample containers were acid

rinsed, glass, amber one-liter bottles provided by the contract laboratory. The apparatus was

lowered and raised throughout the depth of the water column. Before the samples were

collected, the sampling apparatus and the outside of the sample bottles were decontaminated by

rinsing with de-ionized water. Field data were collected at each site at the time of sampling. 

Field data parameters measured included dissolved oxygen (DO), pH, temperature, conductivity,

and turbidity.

CHEMICAL ANALYSIS

All water samples were analyzed for pesticides using SAS5 Modified EPA test method 525.2. A

detailed list of constituents is included in Appendix II. After collection, samples were preserved

with hydrochloric acid, placed in ice, and transported to a contract laboratory where they were

analyzed. Samples were not filtered before analysis. To ensure QA/QC requirements were met,

a single duplicate water sample and a single Matrix Spike/Matrix Spike Duplicate were collected

during each sampling route. All water samples qualified for Data Quality Assessment (DQA)

level 3 (Appendix III) according to the Quality Assurance Project Plan (QAPP). Analytical

results included QC check samples for each batch of samples from which precision, accuracy,

and completeness were determined. Detection limits were determined using 40 CFR Part 136

Appendix B, Revision 1.11. Raw data, chromatograms, spectrograms, and bench sheets were not

included as part of the analytical reports received by the investigators, but have been maintained

by the Contract Laboratory for easy retrieval and review. Data falling under this category is

considered as complete and is used for regulatory decisions (Appendix III).
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

7

QUALITY ASSURANCE MEASUREMENTS

Precision

Quality assurance for analytical precision was based on laboratory duplicates, Matrix Spike

(MS), Matrix Spike Duplicates (MSD) and Relative Percent Difference (RPD). Overall precision

of the study reported in Table 2 was 1.6% for Field Duplicates and 8.4% for MS/MSD, within

the +/-30% established by the QAPP.

Accuracy

Quality assurance for analytical accuracy was based on MS/MSD and is reported in Table 3. The

study average for % Recovery was 129.0 for MS and 129.9 for MSD, within the 70 – 130%

limits established by the QAPP.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

8

Table 2 Precision Measured in Duplicate Samples

Acetochlor Atrazine Metolochlor

Survey EHL Field Dupl MS/MSD Field Dupl MS/MSD Field Dupl MS/MSD

Week Report # RPD(1) % RPD(1) RPD(1) % RPD(1) RPD(1) % RPD(1)

3/31/98 315319-44 1.6 82.4 * 5.2

4/20/98 319227-53 4.3 7.0 6.2

4/27/98 320683-709 15.9 66.7 10.7 0.0 5.5

5/4/98 323308-33 22.2 66.7 13.3

5/13/98 324374-400 8.9 28.6 7.4 22.2 3.1

5/20/98 326572-98 28.6 13.9 0.0 19.0 10.5 6.6

5/27/98 327461-86 12.7 4.2 9.5

6/3/98 328848-74 66.7 0.2 0.0 9.3 0.0 1.2

6/9/98 330586-621 7.0 3.6 5.4 1.9 7.6 9.3

6/17/98 331721-47 0.0 6.4 14.1 13.0 1.7 0.3

6/24/98 333517-42 0.0 5.5 7.4 14.0 0.0 6.1

6/30/98 334635-61 3.8 1.5 38.1 17.4 10.5 3.7

7/8/98 335928-54 0.0 1.2 6.9 7.2 4.9 1.9

7/8/98 337552-73 3.2

7/15/98 337574-600 18.2 6.5 0.0 3.2 0.0 9.3

7/21/98 339485-511 12.2 0.0 4.7 13.3 2.4

7/27/98 341880-912 4.9 9.9 0.0 1.3

Parameter Average 14.7 6.6 7.5 14.1 0.9 4.7

Study Average 1.6 8.4 1.6 8.4 1.6 8.4

(1) Relative Percent Difference

* indicates exceedance of ±30% RPD limits as established in the QAPP
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

9

Table 3 Accuracy Measured in Spiked Samples

Acetochlor Atrazine Metolochlor

Survey EHL MS(1) MSD(2) MS MSD MS MSD

Week Report # % Recov % Recov % Recov % Recov % Recov % Recov

3/31/98 315319-44 118.5 116.6 582.4 * 242.5 * 133.0 * 126.2

4/20/98 319227-53 106.3 111.0 89.0 96.7 116.6 124.1

4/27/98 320683-709 112.4 131.8 8 104.5 117.5 104.5 111.4

5/4/98 323308-33 71.5 61.5 * 52.9 *

5/13/98 324374-400 108.8 120.5 86.3 75.2 92.9 88.4

5/20/98 326572-98 59.3 * 107.3 58.2 * 280.8 * 86.4 99.7

5/27/98 327461-86 75.2 93.6 -48.2 * -39.5 * 50.0 * 65.4 *

6/3/98 328848-74 107.9 107.6 109.1 131.0 * 110.4 112.1

6/9/98 330586-621 115.9 120.6 100.1 102.9 114.1 127.4

6/17/98 331721-47 125.7 139.4 * 179.9 * 115.6 194.7 * 192.2 *

6/24/98 333517-42 112.4 97.7 268.2 * 99.8 133.5 * 98.0

6/30/98 334635-61 104.4 106.3 122.4 89.1 152.3 * 138.6 *

7/8/98 335928-54 108.3 106.8 100.5 85.4 127.9 133.0 *

7/8/98 337552-73 173.5 * 179.6 *

7/15/98 337574-600 155.7 * 166.1 * 491.0 * 509.0 * 159.8 * 182.9 *

7/21/98 339485-511 141.3 * 159.7 * 119.3 128.6 142.7 * 148.8 *

7/27/98 341880-912 112.3 117.9 95.2 86.2 120.6 122.6

Parameter Average 108.5 120.2 157.5 141.4 121.5 128.2

Study Average 129.0 129.9 129.0 129.9 129.0 129.9

(1) Matrix Spike

(2) Matrix Spike Duplicate

* indicates exceedance of % Recovery Limits of 70 – 130 % as established by the QAPP
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

10

SELECTED PESTICIDE NARRATIVES

The Upper Wabash River Basin is 92% cropland (USGS 1994). This can indicate heavy use of

agricultural pesticide. Table 4 lists the selected pesticides along with their brand names, target

crop, MCL, and the number of times that a pesticide was identified above the detection limit and

the number of times it exceeded the MCL. The top ten pesticides used in Indiana were:

Table 4 Most Commonly Used Pesticides and Associated Information

Common Name Brand Name

Crop receiving

treatment

Detection

limit/

MCL*

Number of hits above

Detection limit/Above

the MCL

Acetochlor Harness and Surpass Corn 0.1 ug/L 

2 ug/L

260/45

Atrazine Aatrex Corn and Sorghum 0.1 ug/L

3 ug/L

342/95

Chlorpyrifos Dursban, Empire,

Lorsban, Brodan,

Detmol UA

Can be used on all types of

crops

0.1 ug/L

NA

107/NA

Clomazone Command,

Commence, and

Merit

Soybean 0.1 ug/L

NA

88/NA

Cyanazine Bladex and Fortrol Corn, Sorghum, wheat 0.1ug/L

NA

60/NA

Glyphosate Roundup, Rodeo,

Landmaster, Sting

Soybean NA

700 ug/L

Not included in EPA test

method 525.2

Metolachlor Dual and Pennant Corn, Soybeans, Potatoes

and Sorghum

0.1 ug/L

NA

352/NA

Pendimethalin Prowl, Squadron,

Stomp

Soybean 0.1 ug/L

NA

2/0

Terbufos Aragran, Conrtaven,

Counter, and Plydox

Corn 0.1 ug/L

0.2 NA

0/NA

2,4-D Justice, Lawn-Keep,

Miracle

Soybean NA

70 ug/L

Not included in EPA test

method 525.2

*Maximum Contaminant Level (MCL) = MCL are set for finished drinking water, and are figured using a yearly

mean concentration. These are not surface water standards. Currently there are no surface water standards

established for the listed pesticides in unfinished surface water. The MCL is just used as a reference point in this

case.

N/A – not applicable. MCL has not been established.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

11

The National Agricultural Statistics Service (NASS) reports that 7.05 million pounds of atrazine,

4.92 million pounds of metolachlor, 3.63 million pounds of acetochlor, and 1.09 million pounds

of cyanazine were applied to 5.8 million acres of corn in Indiana during 1998. In addition, 2.68

million pounds of glyphosate, 1.0 million pounds of pendimethalin, 0.58 million pounds of 2,4-

D, and 0.43 million pounds of metolachlor were applied to 5.7 million acres of soybeans in 1998

(NASS 1999). Figure 1 represents the data provided by NASS by listing the percent of an

individual pesticide pounds to the sum all the reported pesticide pounds applied.

Figure 1 Percentage of Pounds of Selected Pesticides Applied to Corn and Soybeans for the State of

Indiana

Further details and a limited list of their associated brand names for the ten most commonly used

pesticides are discussed below.

Atrazine

Brand Name(s): AATREX, BICEP, EXTRAZINE, BULLET, LARIAT, SURPASS and GUARDSMAN

Atrazine, a triazine derivative (Carter, Lydy, and Crawford 1995), is a restricted use pesticide

1998 Indiana Pesticide Usage for Corn and Soybeans

Data Provided by National Agricultural Statistics Service

Percentage of Total Pounds Applied in Indiana

Acetochlor, 14.4 %

Atrazine, 27.9 %

Cyanazine, 4.3 %

Pendimethalin, 3.9 %

Others, 13.1 %

Terbufos, 3.7 %

Metolachlor, 21.2 %

Glyphosate, 11.4 %
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

12

with a toxicity rating of III (moderately toxic). Atrazine has been produced by Novartis (formally

Ciba Corporation) since 1958. It is used as a preemergent and postemergent herbicide to control

broadleaf and grassy weeds for corn production. Atrazine is used to kill weeds by inhibiting the

photosynthetic process in targeted plants. The soil absorption is moderate, and the biological

degradation for aerobic conditions is about 146 days and 159 days for anaerobic conditions. The

persistence of atrazine in the field is about 60 days, making this a very effective herbicide, but it

can persist in the soil for more than a year in arid environmental conditions and high soil pH

(Ahrens 1994). Atrazine was the most used pesticide in Indiana, with an estimated 7.05 million

pounds applied to 89% of the 5.8 million acres of corn crops in 1998 (NASS 1999). It is

considered a possible human carcinogen. It has been found to cause tumors in mammary glands

and other reproductive organs in laboratory animals, and has a low-level bioaccumulation in fish.

 It has been categorized as possible endocrine disruption (ORSANCO 1997).

Atrazine was the most commonly detected herbicide and was found at a concentration of 36 ug/L

on June 11, 1998 at Mississinewa River near Ridgeville (Table V-7 & Graph VI-7). The average

concentration for the 15-week sampling season was 3.31 ug/L. The month of June then doubled

the seasonal MCL with an average of 6.62 ug/L. The only two sites that never exceeded 3.0 ug/L

were TR-79, and TR-159. The rest of the sites exceeded this value on at least one occasion. 

Over half of the sites which contain a concentration over 3.0 ug/L (15/22) had between 4-7

samples that recorded an atrazine concentration greater than or equal to 3.0 ug/L.

Metolachlor

Brand Name(s): DUAL

Metolachlor, a chloroacetamide class of herbicide (Carter, Lydy, and Crawford 1995), is a

general use pesticide, and has a class III toxicity rating. It can be a restricted use pesticide when

paired with atrazine or cyanazine. Ciba Corporation, now known as Novartis, first produced

metolachlor in 1972. It is applied as a preemergent as well as a postemergent herbicide to control

broadleaf weeds, grasses, and yellow nutsedge in corn and soybean fields for about 10-14 weeks.

Metolachlor is moderately absorbed to soil and prefers muck, clay and organic matter. The

compound’s photo degradation period is about 70 days. It aerobically degrades in about 67 days

and anaerobically in 81 days (Ahrens 1994). Metolachlor was the second most used pesticide in

Indiana (NASS 1999). There was an estimated 4.93 million pounds applied to 42% of the 5.8

million acres of corn, and an additional 0.43 million pounds applied to 4% of the 5.7 million

acres of soybeans in 1998.

The peak concentration of metolachlor found in the Mississinewa River at Ridgeville (Table V-7

& Graph VI-7) with a concentration of 41 ug/L. The average concentration for the 15 week

sample season was 2.17 ug/L. Metolachlor was detected in all but 8 samples out of 358 total

samples. Each sampling site displayed several samples that detected metolachlor.

Acetochlor

Brand Name(s): HARNESS, GUARDIAN, and SURPASS
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

13

Acetochlor, manufactured by Monsanto and Zeneca, is a restricted use pesticide and has a

toxicity class rating I (highly toxic). Acetochlor is a member of the chloroacetamide chemical

family. It is used to control grasses, some broadleaf weeds, and yellow nutsedge in corn. The

U.S. Environmental Protection Agency (USEPA) conditionally registered acetochlor in 1994. 

This was due to the broad-spectrum weed control provided by acetochlor and low labeled use

rates. The USEPA expects that use of acetochlor will significantly reduce total amounts of

herbicides used in the United States. The continued registration of acetochlor is conditional,

based on the targeted use reductions of the herbicides alachlor, atrazine, butylate, EPTC,

metolachlor, and 2,4-D. Acetochlor has chemical properties similar to alachlor and metolachlor,

and has been classified by the USEPA as a probable human carcinogen. 

Registration of acetochlor will be canceled automatically if there is a violation of any of the

following conditions:

• reductions in the use of other broad-spectrum herbicides are not met

• measured concentrations of acetochlor in groundwater consistently exceed 0.1

micrograms per liter (ug/L) at a large number of wells or

• exceed 1.0 ug/L in groundwater at a small number of wells.

Also the annual average concentration of acetochlor cannot exceed 2.0 ug/L in the surface water

supply of a specified number of community water systems (Crawford 1997).

Acetochlor is readily absorbed by soil and is degraded by microbes. Generally, acetochlor

provides 8-12 weeks of preemergent weed control, but can vary depending on soil type and

weather conditions (Ahrens 1994). Rainfall totals of 0.3-0.6 inches will activate acetochlor 7-10

days after application, and it is most active on heavy or high organic matter soils (Thomson

1993). Acetochlor was the third most used pesticide in Indiana during 1998 with 3.63 million

pounds applied. Acetochlor was applied to 32% of the 5.80 million corn acres planted in 1998

(NASS 1999).

Based on the recent USGS report on acetochlor and statistics from NASS, the use of acetochlor

over the past several years has increased. In 1997 NASS reported acetochlor was used on only

15% of 6 million corn acres of Indiana. Crawford (1997) reported peak concentrations of

acetochlor in surface water to be around 3.2 ug/L. However, findings of this study revealed that

peak concentrations of acetochlor were detected at 14 ug/L during the largest rain event (Table

V-7 & VI-7). However monthly averages of acetochlor concentration never exceeded the MCL

of 2.0 ug/L. Of the 24 sites sampled 21 had at least one week with the acetochlor concentration

greater than or equal to 2.0 ug/L. There were three sites that had a third or more of their samples

greater than or equal to the 2.0 ug/L. These sites were WB-387 (Table V-6 & Graph VI-6), S-30

(Table V-4 & Graph VI-4), and S-3 (Table V-5 & Graph VI-5). Site S-3 had a concentration that

exceeded the MCL for the whole month of June in addition to the last week of May and the first

week of July. The other two sites had four samples in a row that exceeded the MCL. These

concentrations occurred during the initial rains following the planting season.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

14

Glyphosate

Brand Name(s): SILHOUETTE, RATTLER, ROUNDUP, RODEO and TOUCHDOWN

Glyphosate is a general use pesticide and is not part of any accepted chemical family. It has a

toxicity rating of II (very toxic). Glyphosate is manufactured by several companies including

Monsanto, Cenex/Land O=Lakes, Helena and Zeneca. Glyphosate is usually mixed with a salt and

another herbicide to create an effective product. It is used as both a preemergent and a

postemergent herbicide. Glyphosate is a broad-spectrum, non-selective systemic herbicide used

for control of annual and perennial plants including grasses, sedges, broad-leaved weeds, and

woody plants. It rapidly absorbs to all soils, degrades microbially in soil and has a low potential

for movement by runoff in field and lab studies (Ahrens 1994). About 2.68 million pounds of

glyphosate were applied to 55% of the 5.70 million acres of soybean crops in 1998, and about .21

million pounds of glyphosate were applied to 6% of 5.8 million acres of corn in 1998 (NASS

1999). Glyphosate was not included among the analytes in the test method used for this study. 

This compound was the fourth most used herbicide in 1997 and has an MCL of 700 ug/L.

Cyanazine

Brand Name(s): BLADEX

Cyanazine is a restricted use pesticide and is part of the triazine chemical family (Carter, Lydy,

and Crawford 1995) with a toxicity rating of III. Cyanazine was developed by DuPont in 1971

for use on corn to control broadleaf and grassy weeds. Cyanazine is the fifth most used herbicide

in Indiana, with an estimated 1.09 million pounds applied to 13% of the 5.8 million acres of corn

in Indiana in 1998 (NASS 1999). DuPont has agreed to phase out cyanazine completely in

response to a special review of the herbicide by the USEPA concerning chronic cyanazine

exposure and the risk of cancer, occurrence in groundwater, and its teratogenicity. The

manufacturer chose to phase out cyanazine voluntarily due to the costly review process. The

phase out will begin by reducing the manufacturer’s recommended application rates. All sales

and distribution by DuPont were banned December 31, 1999. Retailers will be permitted to sell

existing stocks through September 1, 2002, with all use prohibited after December 31, 2002

(ORSANCO 1997).

Cyanazine inhibits photosynthesis of broadleaf weeds and several grasses. It can be used as a

preemergent or postemergent herbicide. Cyanazine=s absorption increases when water content in

soil is low and organic matter is high (Ahrens 1994). Cyanazine is part of the triazine family

along with simazine and atrazine. This corn herbicide is not used nearly as much as atrazine but

is still an effective herbicide. The peak concentration found for cyanazine in this project was 3.8

ug/L. An MCL for cyanazine is not available.

Pendimethalin

Brand Name(s): PROWL, PURSUIT, SQUADRON, SOUTHERN WEEDGRASS CONTROL and 

ORNAMENTAL HERBICIDE II
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

15

Pendimethalin, a member of the dinitroaniline chemical family (Carter, Lydy, and Crawford

1995), is a general use pesticide and is manufactured by two companies, American Cyanamid

and Scotts. It has a toxicity rating of III. The intended use of the chemical is for controlling

grasses and certain broadleaf weeds. It is used in both preemergent and postemergent

applications. Pendimethalin can be applied in liquid fertilizer, or impregnated on dry bulk

fertilizer. This compound is strongly absorbed by clay and organic matter. Degradation is rapid

under anaerobic conditions and slow under aerobic conditions. Pendimethalin is immobile when

strongly bound to clay and organic matter. Most pendimethalin washed into surface water via

sediment will remain bound to sediment and unavailable to aquatic life (Ahrens 1994). 

Approximately 1.0 million pounds of pendimethalin was applied to 19% of the 5.70 million acres

of soybean plants in 1998 (NASS 1999). Pendimethalin was only detected 3 times throughout

the study with a peak concentration of 0.2 ug/L. It was the sixth most used pesticide in 1998.

Terbufos

Brand Name(s): ARAGRAN, CONTRAVEN, COUNTER, and PLYDOX

Terbufos, a member of the organophosphate chemical family, is a restricted use pesticide only in

products with 15% or more active ingredient. It is classified as toxicity class I, highly toxic. 

Terbufos is an insecticide and nematicide used on corn. It is used to control wireworms,

seedcorn maggots, white grubs, corn rootworm larvae, and other pests. Terbufos is extremely

toxic to birds, mammals, fish, and aquatic invertebrates. There is no known effects on the

reproductive systems or teratogenic, mutagenic, or carcinogenic effects to laboratory animals. 

Terbufos is moderately persistent in soil. Degradation is rapid in the first 15-30 days after

application. It dissipates quicker in soils with very low organic carbon. Soil temperature

increases the time of degradation, and soil moisture has no effect on terbufos. It is generally

immobile and is therefore unlikely to leach out of the area applied. In one study, over 90% of the

applied terbufos was recovered in the top 4 inches of a soil profile despite heavy rainfall (Oregon

State University 1996).

There were no samples that have a concentration of terbufos above the detection limit in 1998. It

was the seventh most used pesticide in 1998

2,4-D

Brand Name(s): TILLER, NAVIGATE, CLASS, WEED-PRO 4 AMINE, JUSTICE, WARRANT,

BARRAGE, and CAMPAIGN

2,4-D is a general use pesticide with a toxicity rating of III, and belongs to the chlorinated

phenoxy chemical family (Carter, Lydy, and Crawford 1995). It is a foliar-applied herbicide used

to control many broadleaf weeds such as pigweed, ragweed, cocklebur and others with little or no

activity against grasses. It is also labeled for aquatic weed control, specifically for Eurasian

water milfoil, water hyacinth, bulrush, bladderwort, and water lily. 2,4-D is exclusively used for

postemergent applications. Many different companies manufacture 2,4-D. They include
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

16

AgrEvo, AGSCO, Applied Biochemists, Cenex, Cornbelt, DowElanco, Farmland, Helena,

Monsanto and others.

2,4-D undergoes degradation via microbial breakdown in warm, moist soil. The rate of

breakdown increases with increased temperatures and moisture. The average field half-life is 10

days. There is a potential for mobility, but rapid degradation in soil and removal from soil by

plant uptake minimizes leaching (Ahrens 1994). Approximately 0.58 million pounds of 2,4-D

were applied to 26% of the 5.70 million acres of soybeans, and 0.18 million pounds applied to

7% of the 5.80 million acres of corn planted in 1998 (NASS 1999). As with glyphosate, 2,4-D

was not included among the analytes in the test method used for this study. 2,4-D was the

seventh most used herbicide in 1997.

Chlorpyrifos

Brand Name(s): DURSBAN, LORSBAN, BRODAN, DETMOL, UA, DOWCO 179, EMPIRE,

ERADEX, PAQEANT, PIRIDANE, SCOUT, and STIPEND.

Chlorpyrifos, a general use pesticide depending on the toxicity of the formulation. It belongs to

the organophosphate chemical family, and has a toxicity class of II. The manufacturer of

chlorpyrifos is DowAgra.

Chlorpyrifos is a broad-spectrum organophosphate insecticide. It was originally used to control

mosquitoes; it is no longer registered for that use. It is an effective control for cutworms, corn

rootworms, cockroaches, grubs, flea beetles, flies, termites, fire ants, and lice. It is used in

agricultural, lawns and ornamental settings. It is also applied to livestock, domestic dwellings,

and commercial establishments as an insecticide. It is primarily a contact poison, with some

action as a stomach poison.

Chlorpyrifos was detected 107 times at or above the detection limit of 0.1 ug/L. The average of

the 107 detections was 0.4 ug/L. There is no MCL set for chlorpyrifos, but the lifetime health

advisory is 0.02 ug/L.

Clomazone

Brand Name(s): COMMAND and COMMENCE

Clomazone, a general use pesticide, is an unclassified chemical family (Carter, Lydy, and

Crawford 1995), and has a toxicity rating of III. The manufacturer of clomazone is FMC.

Clomazone is used in soybeans as a preplant or a preemergent herbicide. It targets annual

broadleaf and grassy weeds. Chlorophyll is believed to be the target of clomazone. Clomazone

has an average half-life of 24 days, with a half-life in silt loam soils of around 36 days. It has

low mobility in most soil types, but moderate mobility in fine sand (Ahrens 1994). There is no

MCL for clomazone. This was the ninth most commonly used pesticide in Indiana in 1998 using

.28 million pounds on 5.7 million acres of soybeans.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

17

RESULTS AND DISCUSSIONS

This pesticides monitoring report is based on the following assumptions.

1. All conclusions are based on a sampling frequency of a seven-day

cycle.

2. Land use coverage is based on U.S. Geological Survey 1994

publication.

3. Loading calculations were made assuming concentrations and flow

rates remained constant throughout the day.

GENERAL OBSERVATIONS

This report concentrates on atrazine, acetochlor, and metolachlor. These were the three most

used agricultural pesticides in Indiana, and also the most commonly detected in the samples. The

average concentration for the three, in respective order, are 3.31 ug/L, 1.04 ug/L, and 2.17 ug/L. 

There were several other pesticides found regularly during the high flow periods such as alachlor,

cyanazine, and pendimethalin. Although these chemicals are important to mention, they were not

found at the same frequencies as atrazine, acetochlor and metolachlor. For more detailed

information on the pesticides found in this project refer to Appendices IV and V.

The main objective of this project was to detect pesticides if any, establish their respective

concentrations, and calculate loading in surface waters of the Upper Wabash River Basin. Using

this information and estimated herbicide application for the watershed, a percent runoff can be

established. The percent runoff will vary due to many factors such as agricultural practices, soil

characteristics, chemical characteristics of the pesticide, size of watershed, and the amount of

time between the pesticide application and a major rainfall event. The average runoff rates for

the three respective herbicides are as follows: atrazine 1.14%, acetochlor 0.49%, and metolachlor

1.20%. A study of the White River Basin by the USGS indicated a percent runoff of 1% (Carter,

Lydy, and Crawford 1995). Findings of the 1998 Upper Wabash River study indicated a close

relationship to the White River Basin survey. Individual watersheds do have varying results and

are discussed more fully in the section titled: RUNOFF CALCULATIONS.

LOADING CALCULATIONS

To calculate loading, flow data were obtained at USGS gaging stations giving instantaneous flow

velocity readings when grab samples were collected. Loading1was then calculated by

multiplying the flow rate by the concentration of pesticide by a conversion factor for the weight

of one gallon of water.2

 

1 Loading equation, [concentration (ug/L)][flow(cfs)][conversion]=lbs/day

2 Conversion factor equation for the weight of one gallon of water.(28.3L/1

ft3)(ug/L)(ft3/s)(3600s/1hr)(24hr/1d)(1g/106ug)(.0353oz/1g)(1lb/16oz)=.0053945
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

18

To estimate the total load contributed by runoff took further mathematical calculation. The true

shape of the function describing the load per unit time is not known. Instead, the function

available consists of discrete points spaced roughly one week apart, with one load observation

about seven days prior to the following observation. As a result, it is not possible to integrate the

true function to find the total mass of any particular chemical that ran off into the stream.

Figure 2 Example of the Trapezoid Rule

In cases like this, other methods are available to approximate the integral. One of these methods

is known as the Trapezoid Rule. An example graph of this rule can be seen in Figure 2. This

method calculates the area under the load function by creating n-1 trapezoids for n observations

where the area if each trapezoid is (l1 + l 2) /2 * w. The lengths of the legs of the trapezoids are

the magnitude of the successive load observations, and the widths of the trapezoids are the

intervals of time. By summing all of the trapezoids, the total pounds of chemical contributed by

runoff into the stream or river can be approximated for each sampling station. These calculations

were used to construct Tables 5, 6, and 7. Tables 5, 6, and 7 contain only 11 of the 24 sampling

sites. These 11 sites were selected because they represent the first and last sites on the main stem

of the Wabash River and the sampling site closest to the confluence of all the tributaries that

were sampled.

ATRAZINE

Example of the Trapazoid Rule

for the Month of June at WB-387

1998

Chemical Loading

pounds/day

0

2

4

6

8

10

12

14

16

18

20

22

24

6/05 6/11 6/18 6/25

In this example, the sum of the three trapazoids

approximates the total pounds of atrazine

for the month of June

Trapezoid Trapezoid Trapezoid
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

19

Table 5 Loading in Pounds per Day of Atrazine for Eleven Selected Sample Sites

Sample Week WB-445 LR-8 WCS-4 WC-5 DC-5 S-3 ELL-7 TR-9 MS-7 PIP-11 WB-311

04/20/98 3.81 0 0 .46 .38 2.23 .56 4.96 4.62 .25 16.74

04/27/98 1.46 .06 .26 .06 .32 0 .76 0 .45 2.16 6.03

05/04/98 1.77 1 1 1 1

1.51 22.92 19.37 6.03 0 155.99

05/11/98 .88 .26 2.04 9.17 1.12 8.93 .79 27.10 4.82 1.23 19.60

05/18/98 .40 .47 .64 8.68 2.90 1.49 66.60 1.94 6.91 .40 22.79

05/25/98 4.43 .17 8.15 22.60 2.38 1.92 5.36 23.82 6.75 .47 5.93

06/01/98 4.64 .10 1.54 3.34 1.56 2.51 2.93 28.99 9.04 .16 84.87

06/08/98 2.06 .12 .56 1.75 .33 2.51 1.19 14.89 9.52 .11 22.08

06/12/982 3 3820.50 1355.37 249.53 3 3 3 3 32108.39

06/15/98 134.00 9.16 45.56 200.97 28.43 3.03 73.25 257.20 356.85 12.67 1148.05

06/22/98 5.06 .50 .51 28.64 2.69 78.05 6.18 64.30 1.37 .94 710.46

06/29/98 61.66 1

2.98 20.70 1.50 60.87 2.90 28.24 97.78 2.33 157.95

07/06/98 20.38 .66 2.23 28.12 3.10 11.24 5.75 27.24 76.01 4.58 166.20

07/13/98 1.47 .11 .31 2.43 .38 47.35 1.35 7.51 51.40 .19 85.00

07/20/98 8.39 .08 6.14 24.60 21.57 4.16 24.57 28.15 63.82 6.13 153.73

07/27/98 2.83 .34 0 0 .34 1.36 1.75 4.21 21.82 .20 21.94

Total Pounds4

1683 85 567 2775 510 1521 1569 4147 6094 231 20865

Estimated Runoff5

1.0% < 0.1% 0.6% 1.0% 0.5% 0.7% 0.5% 0.6% 2% 0.4% 0.8%

1

Sample lost

2 Extra sampling event for selected stations

3

No data collected

4

 Loading calculated by Trapezoid Integration, extra sampling event of 6/12/98 not included

5

 Expressed as percent of total amount applied in watershed from Tables 8 & 9
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

20

Table 6 Loading in Pounds of Metolachlor for Eleven Selected Sample Sites

Sample Week WB-445 LR-8 WCS-4 WC-5 DC-5 S-3 ELL-7 TR-9 MS-7 PIP-11 WB-311

04/20/98 4.04 .29 .01 .46 .26 2.23 0 0 6.80 .44 16.74

04/27/98 8.16 .06 .44 .63 .21 1.69 0 .98 .75 2.88 6.03

05/04/98 7.28 1 1 1 1

.91 15.28 35.52 1.26 1.68 126.28

05/11/98 .50 .32 1.31 5.93 .70 5.96 1.18 18.97 1.51 .82 14.00

05/18/98 .60 .38 .78 6.75 2.60 .78 36.63 .97 .94 .71 15.95

05/25/98 1.51 .10 5.96 14.90 1.54 .81 1.22 5.95 1.86 .32 2.37

06/01/98 1.35 .06 .54 1.39 .84 .93 .84 6.90 5.19 .10 22.33

06/08/98 .95 .05 .28 .75 .20 .92 .40 3.72 2.33 .09 6.79

06/12/98 2 3 3820.50 1265.01 467.87 3 3 3 3 32459.78

06/15/98 103.18 5.91 35.53 158.66 51.99 1.18 54.94 131.59 17.48 10.97 733.80

06/22/98 2.89 .35 .37 17.73 2.96 24.02 3.09 20.58 199.00 1.28 326.81

06/29/98 56.14 1

2.78 22.23 3.67 126.09 2.32 24.47 96.13 2.44 166.26

07/06/98 28.14 .72 2.48 30.46 10.20 19.50 7.67 32.20 32.40 11.23 232.69

07/13/98 .86 .09 .31 2.77 .58 60.88 .67 5.37 54.04 .09 117.69

07/20/98 4.70 .08 9.65 33.83 80.87 5.14 24.57 14.08 1.31 24.52 197.65

07/27/98 3.77 .34 .20 1.46 .90 1.22 1.31 3.16 25.51 .66 58.52

Total Pounds4

1520 62 479 2331 1180 1724 1091 2388 2923 419 15194

Estimated % Runoff5

1.0% < 0.1% 0.7% 1.0% 1.5% 1.1% 0.5% 0.5% 1.3% 0.9% 0.8%

1

Sample lost

2 Extra sampling event for selected stations

3

No data collected

4

 Loading calculated by Trapezoid Integration, extra sampling event of 6/12/98 not included

5

 Expressed as percent of total amount applied in watershed from Tables 8 & 9
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

21

Table 7 Loading in Pounds of Acetochlor for Eleven Selected Sample Sites

Sample Week WB-445 LR-8 WCS-4 WC-5 DC-5 S-3 ELL-7 TR-9 MS-7 PIP-11 WB-311

04/20/98 0 0 0 .46 .38 0 0 0 0 .38 0

04/27/98 1.46 0 0 .63 .21 0 .38 0 0 1.08 0

05/04/98 .44 1 1 1 1

1.21 7.64 0 0 0 59.43

05/11/98 .25 .11 .44 5.93 .14 6.70 0 10.84 .50 .62 11.20

05/18/98 .20 .19 .20 6.75 .70 1.04 51.80 .97 .35 .12 15.95

05/25/98 1.07 .05 2.19 14.90 .49 .89 4.14 5.95 .62 .06 1.42

06/01/98 1.11 0 .18 .28 .12 1.11 2.51 5.52 2.27 .08 13.40

06/08/98 .30 .02 0 0 0 1.08 .40 1.86 .93 .02 3.40

06/12/982 3 3202.39 451.79 35.87 3 3 3 3 3562.24

06/15/98 29.47 2.43 8.20 37.02 6.50 1.18 27.47 47.85 11.65 1.46 272.22

06/22/98 .58 .09 .06 2.73 .13 23.16 1.12 7.72 71.07 .11 113.67

06/29/98 12.88 1

.60 9.20 .33 95.66 1.16 3.77 29.71 .22 24.94

07/06/98 1.94 .11 .50 2.34 .44 15.00 2.56 7.43 7.48 .41 66.48

07/13/98 0 .02 0 0 0 33.82 0 0 10.29 0 32.69

07/20/98 0 0 0 6.15 5.39 2.20 4.91 0 .29 1.53 21.96

07/27/98 0 0 0 0 0 .50 0 2.11 4.25 0 14.63

Total Pounds4

336 21 98 567 113 1263 750 737 931 43 4995

Estimated Runoff5

0.4% < 0.1% 0.2% 0.4% 0.2% 1.2% 0.5% 0.2% 0.6% 0.1% 0.4%

1

Sample lost

2 Extra sampling event for selected stations

3

No data collected

4

 Loading calculated by Trapezoid Integration, extra sampling event of 6/12/98 not included

5

 Expressed as percent of total amount applied in watershed from Tables 8 & 9
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

22

ESTIMATED HERBICIDES USAGE ON CORN CROP

Crop information from the maps included in Appendix I were used to create Tables 8 and 9.

Table 8 shows the estimated usage of the three major herbicides on corn crops in the Upper

Wabash River Basin, based on the1998 NASS report on chemical usage. The amount of

pesticide applied was calculated using the approximate crop acreage in use during the study, the

percent of individual herbicide applied and the rate applied per crop year. For example, the

watershed upstream of Station TR-159 has an estimated 31,639 corn acres in the Tippecanoe

River Basin. That acreage is then multiplied by 89%, or the percentage of corn acres applied with

atrazine as reported by the NASS (1999). The result is then multiplied by the 1.36 pounds per

acre applied that equals the estimated 38,296 pounds of atrazine in the watershed upstream of

Station TR-159. The rest of the chemicals were applied at different rates and percentages. 

Atrazine was the most prolific chemical used by Indiana corn producers while metolachlor was

second and acetochlor was third. Metolachlor was also used on soybean crops so a combined

total applied between the two crops has been determined and reported in Table 8.
An Assessment of Pesticides in the Upper Wabash River Basin

23

Table 8 Estimated Herbicide Usage on Corn Crops per Crop Year

Site

Area in

sq./mi.1

Acres

Planted to

Corn2

Pounds of

Atrazine

applied3

Pounds of

Acetochlor

applied4

Pounds of

Metolachlor

applied5

Pounds of

Metolachlor

applied to bean

and corn crops6

TR-159 116 31,639 38,296 19,945 27,108 29,715

TR-79 856 243,577 294,826 153,551 208,697 228,768

TR-9 1,869 538,005 651,201 339,158 460,963 505,295

DC-5 274 85,407 103,377 53,841 73,177 80,215

WB-311 7,278 2,142,524 2,593,311 1,350,647 1,835,715 2,012,259

WB-354 3,792 1,123,149 1,359,460 708,033 962,314 1,054861

WB-370 2,700 799,328 967,507 503,896 684,864 750,711

WB-387 1,772 529,287 640,649 333,663 453,493 497,106

WB-409 725 219,559 265,754 138,410 188,118 206,210

WB-445 457 138,287 167,383 87,176 118,484 149,682

LR-8 263 77,882 94,268 49,097 66,729 84,299

ELL-53 384 114,670 138,797 72,288 98,249 124,119

ELL-7 789 236,404 286,143 149,029 202,551 222,031

S-30 425 131,153 158,748 82,679 112,372 123,179

S-3 557 168,841 204,365 106,437 144,663 158,575

MS-100 143 44,829 54,261 28,260 38,409 42,103

MS-36 691 207,410 251,049 130,751 177,709 194,800

MS-7 818 241,744 292,607 152,395 207,126 227,046

PIP-11 159 49,688 60,142 31,323 42,573 46,667

WC-80 146 46,376 56,134 29,235 39,735 43,556

WC-60 242 72,075 87,240 45,436 61,754 65575

WC-15 396 117,161 141,812 73,858 100,384 110,038

WCS-4 243 74,459 90,125 46,939 63,796 69,907

WC-5 794 238,362 288,581 150,263 204,229 223,870

1

values reported from Table 1

2

estimated acreage for basin above station derived from NASS (1999)

3

amount of corn acreage receiving atrazine (89%) multiplied by 1.36 lbs. atrazine applied per acre

4

amount of corn acreage receiving acetochlor (32%) multiplied by 1.97 lbs. acetochlor applied per acre

5

amount of corn acreage receiving metolachlor (42%) multiplied by 2.04 lbs. metolachlor applied per acre

6

total metolachlor applied by combining corn and bean application amounts from Tables 8 and 9
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

24

ESTIMATED PESTICIDE USAGE ON SOYBEAN CROPS

The estimated herbicide usage on soybean crops is shown in Table 9. This table contains

different chemicals than Table 8 because soybeans require different pesticides than corn.

According to the data, glyphosate was the most desirable of the four preferred herbicides.

Pendimethalin was the second most commonly used herbicide, followed by metolachlor and 

2,4-D.

Table 9 Estimated Herbicide Usage on Soybean Crops per Crop Year

Site

Drainage

Area in

Basin sq.

mi.1

Acres

Planted to

Soybeans2

Pounds of

Glyphosate

applied3

Pounds of

Pendimethalin

applied4

Pounds of

Metolachlor

applied5

Pounds of 2,4-D

applied6

TR-159 116 31,639 14,791 5,350 2,607 3,208

TR-79 856 243,577 113,872 41,189 20,071 24,699

TR-9 1,869 538,005 251,517 90,977 44,332 54,554

DC-5 274 85,407 39,928 14,442 7,038 8,660

WB-311 7,278 2,142,524 1,001,630 362,301 176,544 217,252

WB-354 3,792 1,123,149 525,072 189,924 92,547 113,887

WB-370 2,700 799,328 373,686 135,166 65,865 81,052

WB-387 1772 529,287 247,441 89,502 43,613 53,670

WB-409 725 219,559 102,644 37,127 18,092 22,263

WB-445 457 138,287 64,649 23,384 11,395 14,022

LR-8 263 77,882 36,410 13,170 6,417 7,897

ELL-53 384 114,670 53,608 19,391 9,449 11,628

ELL-7 789 236,404 110,519 39,976 19,480 23,971

S-30 425 131,153 61,314 22,178 10,807 13,299

S-3 557 168,841 78,933 28,551 13,912 17,120

MS-100 143 44,829 20,958 7,581 3,694 4,546

MS-36 691 207,410 96,964 35,073 17,091 21,031

MS-7 818 241,744 113,015 40,879 19,920 24,513

PIP-11 159 49,688 23,229 8,402 4,094 5,038

WC-80 146 46,376 21,681 7,842 3,821 4,703

WC-60 242 72,075 33,695 12,188 5,939 7,308

WC-15 396 117,161 54,773 19,812 9,654 11,880

WCS-4 243 74,161 34,670 12,627 6,111 7,520

WC-5 794 238,362 111,434 40,307 19,641 24,170

1

 values reported from Table 1

2

 estimated acreage for basin above station derived from NASS (1999)

3

 amount of soybean acreage receiving glyphosate (55%) multiplied by .85 lbs. glyphosate applied per acre

4

 amount of soybean acreage receiving pendimethalin (19%) multiplied by .89 lbs. pendimethalin applied per acre

5

 amount of soybean acreage receiving metolachlor (4%) multiplied by 2.06 lbs. metolachlor applied per acre

6

 amount of soybean acreage receiving 2,4-D (26%) multiplied by .39 lbs. 2,4-D applied per acre
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

25

RUNOFF CALCULATIONS

The importance of noting the percent runoff is to become aware of the watersheds that seem to be

at a higher risk of pesticide entering into surface water. There are many factors that can cause a

significant change in the amount of runoff within a watershed. These factors can be attributed to

soil formation, agricultural practices, rainfall events and frequency of the events, and watershed

land uses. One factor that can be noted in this study is rainfall correlated with sampling time. As

noted earlier, the study design called for sampling on a weekly basis with only one sample per

site. On one occasion an extra sample was taken following a severe rain event on June 12, 1998.

The entire Wildcat Creek watershed was sampled during this extra sampling event. This

provided the opportunity to observe what changes, if any, occurred directly following a major

rainfall event. The results indicate that huge amounts of herbicides are present following a

rainstorm. In fact, by looking at the percent runoff of atrazine at site WC-80, Wildcat Creek at

Jerome, the normal sampling scheduled displayed a percent runoff of nearly 3%. The extra

sample tripled the runoff for the season, with a percent runoff of over 9%. Viewing the actual

loading pounds can aid in making another comparison. The total loading for the entire normal

sampling season for atrazine was 1,639 pounds, the extra sample on 6/12/98 indicated nearly

4,000 pounds of atrazine flowed past that one site on that one particular day. Table 10 displays

the contribution of land area and percent runoff of the three main herbicides focused on in this

study.

Table 10 Percentage of contributing tributaries to the Upper Wabash River Basin

Water Shed

Name

Station

Representing

Watershed

% of

contributing 

land area

% contribution to

total lbs. of

atrazine

% contribution to

total lbs. of

acetochlor

% contribution to

total lbs. of

metolachlor

Tippecanoe R TR-9 25.7 19.9 14.9 17.0

Mississinewa R MS-7 11.2 29.2 18.8 20.8

Wildcat Creek WC-5 10.9 13.3 11.5 16.6

Eel River ELL-7 10.8 7.5 15.2 7.7

Salamonie R S-3 7.7 7.3 25.5 12.2

Deer Creek DC-5 3.8 2.4 2.3 8.4

Little River LR-8 3.6 0.4 0.4 0.1

Pipe Creek PIP-11 2.2 1.1 0.9 0.4

Summary Statistics for Upper Wabash River Basin

WB-311 7,278 mi2

29,607

total lbs. atrazine

4,945

total lbs. acetochlor

14,082

total lbs.

metolachlor

The significance of Table 10 is to display the ratio of runoff compared to the land area of the

specific watershed. Theoretically the percent chemical load contribution of a specific watershed

to the Wabash River should be identical to the percent of land area of the same watershed. This
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

26

would be a correct assumption only if each of the watersheds had identical traits such as soil

composition, rainfall totals, sampling events related to rainfall, and land use. All of these

physical traits do effect the runoff rates. By comparing the numbers in Table 10, contributions

of chemical loads to the Wabash River resemble the percent land area to a certain extent. Two

contrasting tributaries are the Tippecanoe River and the Mississinewa River. The lack of

contribution of loading in the Tippecanoe River can be attributed, in part, to the fact that its

watershed incorporates several natural lakes and reservoirs. Another factor in the lack of

contribution is the amount of agricultural crop land and pasture area. The Tippecanoe River

Basin has the smallest percentage of agricultural land in the Upper Wabash River Basin at 90%. 

The impact on the Mississinewa River may also be attributed to other factors. A likely

circumstance is that sampling was conducted following a major localized rain event causing that

watershed to contribute more of a load to the Wabash River.

The regions of Indiana that contain the Upper Wabash River Basin experienced large amounts of

rain during the entire summer. The overall 1998 rainfall total was 5.1 inches above the normal,

30-year average. In the sampling months of April - July the rainfall totals were 6.87 inches

above the normal. The month of June was 3.76 inches above the normal total. Table 11 shows

some rainfall data in the study area for this period (Scheeringa 1999).
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

27

Table 11 Rainfall Data for Each Sampling Site

Pesticide related

site City County

Total rain fall

for week of

5/31/98

Total rain fall

for week of

6/7/98

Total rain fall

for week of

6/14/98

TR-159 Oswego Kosciusko 0.12 2.77 1.38

TR-79 Ora Pulaski 0.1 1.77 1.71

TR-9 Delphi Carroll 0.15 3.82 1.37

DC-5 Delphi Carroll 0.15 3.82 1.37

WB-311 Lafayette Tippecanoe .39 4.32 2.42

WB-354 Logansport Cass 0.19 2.59 2.11

WB-370 Peru Miami 0.12 2.71 2.92

WB-387 Wabash Wabash 0.18 2.15 2.63

WB-409 Huntington Huntington 0.17 3.73 2.67

WB-445 Linn Grove Adams 0.25 2.90 .87

LR-8 Huntington Huntington 0.17 3.73 2.67

ELL-53 North Manchester Wabash 0.2 1.28 1.7

ELL-7 Logansport Cass 0.18 2.59 2.11

S-30 Warren Huntington 0.17 3.73 2.67

S-3 Dora Wabash 0.18 2.15 2.63

MS-100 Ridgeville Randolph 1.96 3.23 1.63

MS-36 Marion Grant 0.91 3.79 0.89

MS-7 Peoria Miami 0.12 2.71 2.92

PIP-11 Bunker Hill Miami 0.12 2.71 2.92

WC-80 Jerome Howard 0.25 5.52 2.66

WC-60 Kokomo Howard 0.25 5.52 2.66

WC-15 Owasco Carroll .15 3.82 1.37

WCS-4 Lafayette Tippecanoe 0.39 4.32 2.42

WC-5 Lafayette Tippecanoe 0.39 4.32 2.42

TREND ANALYSIS

By evaluating the pesticides data, as displayed in Appendix VI, Graphs VI-1 through VI-24,

recognizable trends begin to develop. The combination of weather patterns, farming practices,

watershed characteristics, and the chemical properties of the herbicides determine their fate

during late spring and early summer. It is clearly apparent that pesticide loading in the surface

waters is dependent on wet weather events coupled with seasonal patterns of farming techniques.

The bulk of the pesticides detected in this investigation are agricultural herbicides. These

herbicides are primarily applied from preplant through the early part of the postemergent phase of
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

28

a cropped field. The application of agricultural pesticides usually precedes or coincides with the

heaviest seasonal rainfall totals for Indiana. The herbicides found with the most concentration in

surface waters are primarily water-soluble. This physical property allows these pesticides to be

more mobile increasing the amount of herbicides in the run off. The less water soluble a

pesticide is the more affinity the chemical has to organic matter or soil particles, and the less

likely the pesticide will run off into the surface waters.

By observing herbicide concentrations plotted against time, a trend of two distinct peaks is

noticed on a majority of the graphs (Appendix VI). The first peak can be attributed to the

application of the chemicals. Typically this peak is observed to begin in late April and attains its

highest point near mid-May. A peak during this time frame can be due to exceptionally high

amounts of chemicals available for runoff combined with small rainfall events, and atmospheric

deposition resulting from drift after chemical application. This peak is normally followed by a

one to three week plateau or decline in the concentration values, then a drastic increase of the

concentration. It can be noted the bulk of the application ended at this time so there is not as

much deposition from the atmosphere. The increase in concentration can be related to the

increase of rainfall events. The trend after this high point was downward in concentration values.

This occurs because the effort of applying pesticides is reduced after the plants have grown to a

certain size, and any additional applications occurring during this stage is applied to plants that

have all ready sprouted. Applying herbicides to land with growing plants decreases runoff of

chemicals.

Graphs VI-5 and VI-7 display a similar pattern to the average trend discussed above with the

following distinction. The rise in concentration is a little more gradual and the duration of the

plateau is considerably longer. In addition, the final peak is generally about a week behind all the

other corresponding locations. The two sites are located behind the dams at Salamonie and

Mississinewa Reservoirs. This trait can be attributed to the effect of the dam that functions in

controlling downstream flow. Both reservoirs are used for flood control. These dams have

regulated flow from the reservoir, when there is a series of wet weather events or a major wet

weather event sufficient to cause flooding the dam retains enough water to control flooding

downstream. After waters begin to recede downstream the regulated flow is increased to let

more water out of the reservoir. This type of flow regulation explains the delay in the increased

concentration levels.

One graph does not conform to this generalization, Tippecanoe at Oswego, Site TR-159 (Graph

VI-16). The concentrations related to this site show no trends related to any other site in the

study. Likewise the watershed surroundings are not related to any other watershed in any other

way. The Tippecanoe River originates and incorporates several of the natural lakes of Northern

Indiana. This characteristic provides a sink for the chemicals that flow from upstream sources. 

This type of lake system tends to dilute the concentrations and, because of the turnover rate of the

lake, the chemicals are discharged over a longer period of time.

Other variables associated with the amount of individual chemicals detected in the surface water

depend on the amount of use of a chemical in the watershed and the half-life of the chemical.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

29

Clearly a chemical with limited use will display limited concentrations within the watershed. A

chemical with a longer half-life will be more persistent in the water. An example can be seen

comparing atrazine and acetochlor. Atrazine has a half-life of about 60 days where acetochlor

has a half-life of only about 10 days. This has an obvious impact on the detection of a chemical

in surface waters over time.

DRINKING WATER CONCERNS

Table 12 contains a list of three Public Water Supply Facilities that have their drinking water

intake points in the Upper Wabash River Basin. Based on animal toxicity studies, it is safe to

conclude that exposure to these pesticides over a long period of time can cause cancer or noncancer health effects in humans. IDEM=s Office of Drinking Water has recently started a ASource

Water Protection Program@ for human health and safety. It is proposed that to comply with the

IDEM=s Source Water Protection Program, concerned Public Water Suppliers in the Wabash

River Basin take appropriate measures to reduce human exposure to these pesticides in drinking

water.

Table 12 Public Water Supply Facilities Using Surface Water From the Upper Wabash River Basin

Facility Name City Intake location Public Water Supply ID

United Water IndianaWarsawWarsaw Center Lake 5243030

Logansport Municipal

Utility-Water

Logansport Eel River 5209006

Indiana American WaterKokomoKomoko Wildcat Creek 5234007
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

30

RECOMMENDATIONS AND CONCLUSIONS

1. Future pesticides monitoring is the only way to understand the effects of runoff from

pesticides in surface water. Trends in pesticide use within these basins should be

monitored in order to identify emerging water quality issues. Attention should be given

to new pesticides coming into the market.

2. It was very important to identify which tributaries contributed the greatest pesticides

loads to individual watersheds. This information should be used for Non-point Source

Best Management Practices. Priority should be given to federally funded Clean Water

Act Section 319 grant projects within these basins to help alleviate the runoff potential.

3. Future studies of this nature should be completed in Indiana so that pesticide occurrence,

concentrations, and loading can be understood for major tributaries throughout the state.

4. A study of retention time for pesticides in reservoirs and lakes should be undertaken, as

should potential impact on designated uses.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

31

LITERATURE CITED

Ahrens WH. 1994. Herbicide Handbook Committee. Herbicide Handbook, Seventh Edition.

Weed Science Society of America.

Carter DS, Crawford CG, Lydy M.J. 1995. Water-Quality Assessment of the White River Basin,

Indiana: Analysis of Available Information on Pesticides, 1972-92. U.S. Geological Survey,

Water-Resource Investigations Report 94-4034.

Crawford C. 1997. Trends in Acetochlor Concentrations in Surface Waters of the White River

Basin, Indiana, 1994-96, U.S. Geological Survey, Fact Sheet 058-97.

Fowler K, Wilson J. 1996. Low-Flow Characteristics of Indiana Streams, U.S. Geological

Survey, Water-Resources Investigations Report 96-4128.

Greeman TK. 1994. Upper Wabash River Basin, Fenelon JM. (Compiler). U.S. Geological

Survey, Boday KE (Compiler). Hydrogeologic atlas of aquifers in Indiana. Water Resources

Investigations. WRI 92-4142. p 63-84.

[IDEM] Indiana Department of Environmental Management. 1996. Surface Water Quality

Monitoring Strategy 1996 - 2000. Revised May 1998. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch. 20 p, 3 ap. IDEM

32/01/013/1996.

[IDEM] Indiana Department of Environmental Management. 1998. Quality Assurance Project

Plan. Addendum 1, Selected Herbicide, Pesticide, and Semi-Volatile Chemicals Analysis. Indiana

Department of Environmental Management. Office of Water Management. Assesesment Branch.

Grant Numbers C995008-96-1, BG985432-97. 14 p. IDEM 32/01/001/1998.

[IDNR] Indiana Department of Natural Resources. 1980. The Indiana Water Resource,

Availability, Uses, and Needs. Indiana Department of Natural Resources, Division of Water.

[NASS] National Agricultural Statistics Service. 1999. Agricultural Chemical Usage 1998 Field

Crops Summary

Oregon State University. 1996. Extension Toxicology Network Page. 

http://ace.orst.edu/info/extoxnet/pips/terbufos.htm

[ORSANCO] Ohio River Valley Water Sanitation Commission. 1997. Herbicides in the Lower

Ohio River Basin

Scheeringa K. 1999. Indiana Climate Page. http://shadow.agry.purdue.edu/toolbox/cdmap.gif. 

November 1999.
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

32

Thomson WT. 1993. Agricultural Chemicals. Book II: Herbicides. Thomson Publications,

Fresno, CA.

[USGS] U.S. Geological Survey. 1994. USGS land use and land cover (LULC) date geospatial

data presentation form: Map: Sioux Falls, South Dakota. U.S. Geological Survey
APPENDIX I

Maps and Sampling Locations

Upper Wabash River Basin
1 0 1 2 3 4 Miles

N

Legend

Agriculture

Cropland Area: 63,277 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site TR-159

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan

Map 1- Tippecanoe River at Oswego

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

$Z

Oswego
4 0 4 8 12 Miles

$Z

Rochester

Warsaw

Ora

Legend

Agriculture

Cropland Area: 487,154 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site TR-79

N

Map 2- Tippecanoe River near Ora

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
4 0 4 8 12 16 Miles

$Z

Warsaw

Rochester

#Delphi

Legend

Agriculture

Cropland Area: 1,076,009 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site TR-9

N

Map 3- Tippecanoe River near Delphi

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
Delph$Zi

2 0 2 4 6 Miles

Legend

Agriculture

Cropland Area: 170,814 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site DC-5

N

Map 4- Deer Creek near Delphi

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Logansport

Kokomo

Marion

Huntington

Warsaw

Lafayette

S

TA

TE

LINE

Map 5- Wabash River at Lafayette

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Agriculture

Cropland area: 4,285,047 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WB-311

Legend

4 0 4 8 12 Miles

N

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Logansport

Huntington

Marion

S

TA

T

E

LIN

E

4 0 4 8 12 16 Miles

Legend

Agriculture

Cropland Area: 2,246,298 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WB-354

N

Map 6- Wabash River at Logansport

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
4 0 4 8 12 16 Miles

Legend

Agriculture

Cropland Area: 1,598,657 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WB-370

N

Map 7- Wabash River at Peru

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan

$Z

Peru

Huntington

Marion

S

TA

T

E

LIN

E
$Z

Huntington

Bluffton

Wabash

ST

A

TE LINE

Legend

Agriculture

Cropland Area: 1,058,573 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WB-387

N

Map 8- Wabash River at Wabash

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

3 0 3 6 9 12 Miles

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
2 0 2 4 6 8 10 Miles

$Z

Huntington

Bluffton

S

TA

TE LINE

Legend

Agriculture

Cropland area: 439,118 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Watershed boundary

Rivers & Streams

$Z Sampling Site WB-409

N

Map 9- Wabash River at Huntington

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
N

2 0 2 4 6 Miles

Legend

Agriculture

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WB-445

Cropland area: 276,575 acres

Map 10- Wabash River at Linn Grove

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan

$Z

S

TA

TE

LINE

Linn Grove
2 0 2 4 6 8 Miles

$Z

Huntington

#

Legend

Agriculture

Cropland Area: 155,763 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site LR-8

N

Map 11- Little River near Huntington

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
2 0 2 4 6 Miles

$Z

North Manchester

Columbia City

Legend

Agriculture

Cropland Area: 229,339 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site ELL-53

N

Map 12- Eel River at North Manchester

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

North Manchester

Logansport

#

Columbia City

4 0 4 8 12 Miles

Legend

Agriculture

Cropland Area: 472,808 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Wetlands

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site ELL-7

N

Map 13- Eel River near Logansport

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Warren

Portland

Legend

Agriculture

Cropland Area: 262,306 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site S-30

N

2 0 2 4 6 8 Miles

Map 14- Salamonie River near Warren

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Portland

Lagro

N

2 0 2 4 6 8 Miles

Agriculture

Cropland Area: 337,682 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site S-3

Legend

Map 15- Salamonie River at Dora

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

STA

TE LINE

Union City

N

Agriculture

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site MS-100

Cropland Area: 89,658 acres

Legend

1 0 1 2 3 4 Miles

Map 16- Mississinewa River near Ridgeville

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
Agriculture

Cropland Area: 414,820 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site MS-36

Legend

2 0 2 4 6 8 10 Miles

N

Map 17- Mississinewa River at Marion

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

$Z

Union City

Hartford City

Marion

S

TA

TE LINE

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Union City

Marion

Peoria

STATE LINE

N

4 0 4 8 12 Miles

Agriculture

Cropland area: 483,489 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site MS-7

Legend

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan

Map 18- Mississinewa River at Peoria
Bunke$Zr

Hill

2 0 2 4 Miles

Legend

Agriculture

Cropland Area: 99,377 acres

Forest

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site PIP-11

N

Map 19- Pipe Creek near Bunker Hill

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Jerome

Windfall City

#

2 0 2 4 Miles

Legend

Agriculture

Cropland Area: 92,752 acres

Forest

Industrial & Commercial

Urban & Residential

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WC-80

N

Map 20- Wildcat Creek near Jerome

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
$Z

Kokomo

2 0 2 4 Miles

Legend

Agriculture

Cropland Area: 144,150 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WC-60

N

Map 21- Wildcat Creek at Kokomo

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
2 0 2 4 6 8 10 Miles

$Z

Owasco

Kokomo

Legend

Agriculture

Cropland Area: 234,321 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WC-15

N

Map 22- Wildcat Creek at Owasco

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
2 0 2 4 6 8 Miles

$Z

Lafayette

Frankfort

#

Legend

Agriculture

Cropland Area: 1,598,657 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WCS-4

N

Map 23- South Fork Wildcat Creek near Lafayette

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
2 0 2 4 6 8 10 Miles

$Z

Lafayette

Frankfort

Kokomo

Legend

Agriculture

Cropland Area: 476,723 acres

Forest

Lakes & Reservoirs

Industrial & Commercial

Urban & Residential

Other Land

County boundaries

Rivers & Streams

Watershed boundary

$Z Sampling Site WC-5

N

Map 24- Wildcat Creek near Lafayette

McDuffee R. 2001. An Assessment of Pesticide Concentrations in

the Upper Wabash River Basin. Indiana Department of Environmental

Management, Office of Water Management, Assessment Branch,

Surveys Section, Indianapolis, Indiana. IDEM 032/02/024/2001

Map Reference

Projection: UTM, Zone 16

Printed: March 8, 1999

Plate Preparation: Kathleen Hagan
APPENDIX II

Parameter List for SAS5

Modified EPA TEST Method 525.2
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II-1

APPENDIX II

Parameter List for SAS5 Modified EPA Test Method 525.2

CAS Number Compound Detection Limits -

Fg/L

208-96-8 Acenaphthylene 0.1

34256-82-1 Acetochlor 0.1

15972-60-8 Alachlor 0.1

309-00-2 Aldrin 0.1

834-12-8 Ametryn 0.1

101-05-3 Anilazine 0.5

120-12-7 Anthracene 0.1

3244-90-4 Aspon 0.1

1610-17-9 Atraton 0.1

1912-24-9 Atrazine 0.1

86-50-0 Azinphos-methyl 0.1

1861-40-1 Benfluralin 0.1

56-55-3 Benzo[a]anthracene 0.1

205-99-2 Benzo[b]fluoranthene 0.1

207-08-9 Benzo[k]fluoranthene 0.1

191-24-2 Benzo[g,h,i]perylene 0.1

50-32-8 Benzo[a]pyrene 0.02

319-84-6 alpha-BHC 0.1

319-85-7 beta-BHC 0.1

319-86-8 delta-BHC 0.1

58-89-9 gamma-BHC (Lindane) 0.02

35400-43-2 Bolstar 0.1

314-40-9 Bromacil 0.1

23184-66-9 Butachlor 0.1

2008-41-5 Butylate 0.1

85-68-7 Butylbenzylphthalate 1

5234-68-4 Carboxin 0.1

5103-71-9 alpha-Chlordane 0.1

5103-74-2 gamma-Chlordane 0.1

2675-77-6 Chlorneb 0.1
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II-2

CAS Number Compound Detection Limits -

Fg/L

510-15-6 Chloronbenzilate 0.1

2051-60-7 2-Chlorobiphenyl 0.1

5836-10-2 Chloropropylate 0.1

1897-45-6 Chlorothalonil 0.1

101-21-3 Chlorpropham 0.1

2921-88-2 Chlorpyrifos 0.1

218-01-9 Chrysene 0.1

81777-89-1 Clomazone 0.1

56-72-4 Coumaphos 0.1

21725-46-2 Cyanazine 0.1

1134-23-2 Cycloate 0.1

1861-32-1 DCPA 0.1

72-54-8 4,4'-DDD 0.1

72-55-9 4,4'-DDE 0.1

50-29-3 4,4'-DDT 0.1

8065-48-3 Demeton 0.1

NA Desethylatrazine 1

NA Desisopropylatrazine 1

53-70-3 Dibenzo[a,h]anthracene 0.1

84-74-2 Di-n-butylphthalate 1

333-41-5 Diazinon 0.1

1194-65-6 Dichlobenil 0.1

97-17-6 Dichlofenthion 0.1

99-30-9 Dichloran 0.1

16605-91-7 2,3-Dichlorobiphenyl 0.1

62-73-7 Dichlorvos 0.1

60-57-1 Dieldrin 0.1

103-23-1 Di(2-ethylhexyl)adipate 0.6

117-81-7 Di(2-ethylhexyl)phthalate 0.6

84-66-2 Diethylphthalate 1

60-51-5 Dimethoate 0.1

131-11-3 Dimethylphthalate 1

606-20-2 2,6-Dinitrotoluene 0.1

117-84-0 Di-n-octylphthalate 1
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II-3

CAS Number Compound Detection Limits -

Fg/L

957-51-7 Diphenamid 0.1

298-04-4 Disulfoton 0.1

2497-06-5 Disulfoton sulfone 0.1

994-22-9 Dyfonate 0.1

759-94-4 EPTC 0.1

959-98-8 Endosulfan I 0.1

33213-65-9 Endosulfan II 0.1

1031-07-8 Endosulfan sulfate 0.1

72-20-8 Endrin 0.01

7421-93-4 Endrin aldehyde 0.1

55283-68-6 Ethalfluralin 0.1

563-12-2 Ethion 5

13194-48-4 Ethoprop 0.1

2593-15-9 Etridiazole 0.1

52-85-7 Famphur 0.1

22224-92-6 Fenamiphos 0.1

55-38-9 Fenthion 0.1

69806-50-4 Fluazifop-butyl 0.1

33245-39-5 Fluchloralin 0.1

2164-17-2 Fluometuron 0.1

206-44-0 Fluoranthene 0.1

86-73-7 Fluorene 0.1

76-44-8 Heptachlor 0.04

1024-57-3 Heptachlor epoxide 0.02

52663-71-5 2,2',3,3',4,4',6-Heptachlorobiphenyl 0.1

118-74-1 Hexachlorobenzene 0.1

60145-22-4 2,2',4,4'5,6'-Hexaclorobiphenyl 0.1

77-47-4 Hexachlorocyclopentadiene 0.1

51235-04-2 Hexazinone 0.1

193-39-5 Indeno[1,2,3-cd]pyrene 0.1

78-59-1 Isophorone 0.1

21609-90-5 Leptophos 0.5

113-48-4 MGK 264 0.1

136-45-8 MGK 326 0.1
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II-4

CAS Number Compound Detection Limits -

Fg/L

121-75-5 Malathion 0.1

150-50-5 Merphos 0.1

72-43-5 Methoxychlor 0.1

90-12-0 1-Methylnaphthalene 0.1

91-57-6 2-Methylnaphthalene 0.1

950-35-6 Methyl paraoxon 0.1

51218-45-2 Metolachlor 0.1

21087-64-9 Metribuzin 0.1

7786-34-7 Mevinphos 0.1

2212-67-1 Molinate 0.1

91-20-3 Naphthalene 0.1

15299-99-7 Napropamide 0.1

39765-80-5 trans-Nonachlor 0.1

40186-71-8 2,2',3,3',4,5',6,6'-Octachlorobiphenyl 0.1

19666-30-9 Oxadiazon 0.1

1114-71-2 Pebulate 0.1

40487-42-1 Pendimethalin 0.1

60233-25-2 2,2',3',4,6-Pentachlorobiphenyl 0.1

87-86-5 Pentachlorophenol 0.1

61949-76-6 cis-Permethrin 0.1

51877-74-8 trans-Permethrin 0.1

85-01-8 Phenanthrene 0.1

298-02-2 Phorate 0.1

26399-36-0 Profluralin 0.1

1610-18-0 Prometon 0.1

7287-19-6 Prometryn 0.1

23950-58-5 Pronamide 0.1

1918-16-7 Propachlor 0.1

709-98-8 Propanil 0.1

139-40-2 Propazine 0.1

129-00-0 Pyrene 0.1

122-34-9 Simazine 0.07

1014-70-6 Simetryn 0.1

22248-79-9 Stirofos 0.1
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II-5

CAS Number Compound Detection Limits -

Fg/L

5902-51-2 Terbacil 0.1

13071-79-9 Terbufos 0.1

886-50-0 Terbutryn 0.1

2437-79-8 2,2',4,4'-Tetrachlorobiphenyl 0.1

28249-77-6 Thiobencarb 0.1

43121-43-3 Triademefon 0.1

78-48-8 Tribufos 0.1

15862-07-4 2,4,5-Trichlorobiphenyl 0.1

1582-09-8 Trifluralin 0.1

1929-77-7 Vernolate 0.1
APPENDIX III

Data Quality Assessment Levels
An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II-1

APPENDIX III

Data Quality Assessment Levels

Data Quality Level Description

Level 1

Screening data

The results are usually generated onsite and have no QC checks. Analytical results,

which have no QC checks or no precision or accuracy information or no detection

limit calculations, but just numbers, are included in this category. Primarily, onsite

data are used for presurveys and for preliminary rapid assessment

Level 2

Field analysis data

Data is recorded in the field or laboratory on calibrated or standardized

equipment. Field duplicates are measured on a regular periodic basis. Calculations

may be done in the field or later at the office. Analytical results, which have limited

QC checks, are included in this category. Detection limits and ranges have been set

for each analysis. The QC checks information for field or laboratory results is

useable for estimating precision, accuracy, and completeness for the project. Data

from this category is used independently for rapid assessment and preliminary

decisions

Level 3

Laboratory analytical data

Analytical results include QC check samples for each batch of samples from which

precision, accuracy, and completeness can be determined. Detection limits have

been determined using 40 CFR Part 136 Appendix B, Revision 1.11. Raw data,

chromatograms, spectrograms, and bench sheets are not included as part of the

analytical report, but are maintained by the Contract Laboratory for easy retrieval

and review. Data can be elevated from level 3 to level 4 by the inclusion of this

information in the report. In addition, level 4 QC data must be reported using CLP

forms or CLP format. Data falling under this category is considered as complete and

is used for regulatory decisions

Level 4

Enforcement data

Analytical results mostly meet the USEPA required Contract Laboratory Program

(CLP) data analysis, contract required quantification limits (CRQL), and validation

procedures. QC data is reported on CLP forms or CLP format. Raw data,

chromatograms, spectrograms, and bench sheets are included as part of the

analytical report. Additionally, all reporting information required in the

IDEM/BAA and in the Surface Water QAPP Table 11-1 are included. Data is

legally quantitative in value, and is used for regulatory decisions
APPENDIX IV

Herbicide Concentrations and Stream Flows
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2000

IV-ii

Appendix IV

List of Tables

TABLE IV-1 STATION WB, WABASH RIVER AT LINN GROVE ................................................................................................... 1

TABLE IV-2 STATION WB-409, WABASH RIVER AT HUNTINGTON........................................................................................... 3

TABLE IV-3 STATION LR-8, LITTLE RIVER NEAR HUNTINGTON............................................................................................... 5

TABLE IV-4 STATION S-30, SALAMONIE RIVER NEAR WARREN............................................................................................... 7

TABLE IV-5 STATION S-3, SALAMONIE RIVER AT DORA .......................................................................................................... 9

TABLE IV-6 STATION WB-387, WABASH RIVER AT WABASH................................................................................................ 11

TABLE IV-7 STATION MS-100, MISSISSINEWA RIVER NEAR RIDGEVILLE .............................................................................. 13

TABLE IV-8 STATION MS-36, MISSISSINEWA RIVER AT MARION........................................................................................... 15

TABLE IV-9 STATION MS-7, MISSISSINEWA RIVER AT PEORIA .............................................................................................. 17

TABLE IV-10 STATION WB-370, WABASH RIVER AT PERU.................................................................................................... 19

TABLE IV-11 STATION PIP-11, PIPE CREEK NEAR BUNKER HILL........................................................................................... 21

TABLE IV-12 STATION ELL-53, EEL RIVER AT NORTH MANCHESTER................................................................................... 23

TABLE IV-13 STATION ELL-7, EEL RIVER NEAR LOGANSPORT.............................................................................................. 25

TABLE IV-14 STATION WB-354, WABASH RIVER AT LOGANSPORT....................................................................................... 27

TABLE IV-15 STATION DC-5, DEER CREEK NEAR DELPHI...................................................................................................... 29

TABLE IV-16 STATION TR-159, TIPPECANOE RIVER AT OSWEGO .......................................................................................... 31

TABLE IV-17 STATION TR-79, TIPPECANOE RIVER NEAR ORA .............................................................................................. 33

TABLE IV-18 STATION TR-9, TIPPECANOE RIVER NEAR DELPHI............................................................................................ 35

TABLE IV-19 STATION WC-80, WILDCAT CREEK NEAR JEROME ........................................................................................... 37

TABLE IV-20 STATION WC-60, WILDCAT CREEK AT KOKOMO.............................................................................................. 39

TABLE IV-21 STATION WC-15, WILDCAT CREEK AT OWASCO .............................................................................................. 41

TABLE IV-22 STATION WCS-4, SOUTH FORK WILDCAT CREEK NEAR LAFAYETTE ............................................................... 43

TABLE IV-23 STATION WC-5, WILDCAT CREEK NEAR LAFAYETTE ....................................................................................... 45

TABLE IV-24 STATION WB-311, WABASH RIVER AT LAFAYETTE ......................................................................................... 47
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-1

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-1 Station WB, Wabash River at Linn Grove

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/27/98 Acetochlor 0.5 540 N 07/21/98 Atrazine 2.5 622 N

05/06/98 Acetochlor 0.2 409 N 07/29/98 Atrazine 0.6 873 N

05/13/98 Acetochlor 0.2 232 N

05/20/98 Acetochlor 0.3 124 N 06/05/98 Bromacil 0.5 86 N

05/29/98 Acetochlor 1.9 104 N

06/05/98 Acetochlor 2.4 86 N 06/17/98 Clomazone 0.1 2484 N

06/11/98 Acetochlor 0.6 93 N

06/17/98 Acetochlor 2.2 2484 N 06/11/98 Cyanazine 0.4 93 N

06/24/98 Acetochlor 0.4 268 N 06/17/98 Cyanazine 0.4 2484 N

06/30/98 Acetochlor 1.4 1706 N 06/30/98 Cyanazine 0.3 1706 N

07/08/98 Acetochlor 0.2 1799 N

04/20/98 Di(2-ethylhexyl)phthalate 10 416 N

05/29/98 Alachlor 0.3 104 N 04/27/98 Di(2-ethylhexyl)phthalate 1.2 540 N

06/05/98 Alachlor 0.2 86 N 07/21/98 Di(2-ethylhexyl)phthalate 1.8 622 N

06/17/98 Alachlor 0.3 2484 N

06/24/98 Alachlor 0.1 268 N 04/20/98 Di-n-butylphthalate 11 416 N

06/30/98 Alachlor 0.2 1706 N 05/06/98 Di-n-butylphthalate 1.1 409 N

07/15/98 Di-n-butylphthalate 1.4 160 N

04/20/98 Atrazine 1.7 416 N 07/21/98 Di-n-butylphthalate 1.9 622 N

04/27/98 Atrazine 0.5 540 N

05/06/98 Atrazine 0.8 409 N

05/13/98 Atrazine 0.7 232 N

05/20/98 Atrazine 0.6 124 N

05/29/98 Atrazine 7.9 104 N

06/05/98 Atrazine 10 86 N

06/11/98 Atrazine 4.1 93 N

06/17/98 Atrazine 10 2484 N

06/24/98 Atrazine 3.5 268 N

06/30/98 Atrazine 6.7 1706 N

07/08/98 Atrazine 2.1 1799 N

07/15/98 Atrazine 1.7 160 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-2

Table IV-1 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/20/98 Metolachlor 1.8 416 N 07/08/98 Metolachlor 2.9 1799 N

04/27/98 Metolachlor 2.8 540 N 07/15/98 Metolachlor 1.0 160 N

05/06/98 Metolachlor 3.3 409 N 07/21/98 Metolachlor 1.4 622 N

05/13/98 Metolachlor 0.4 232 N 07/29/98 Metolachlor 0.8 873 N

05/20/98 Metolachlor 0.9 124 N

05/29/98 Metolachlor 2.7 104 N 04/27/98 Simazine 0.18 540 N

06/05/98 Metolachlor 2.9 86 N 05/29/98 Simazine 0.29 104 N

06/11/98 Metolachlor 1.9 93 N 06/05/98 Simazine 0.51 86 N

06/17/98 Metolachlor 7.7 2484 N 06/11/98 Simazine 0.19 93 N

06/24/98 Metolachlor 2.0 268 N 06/17/98 Simazine 0.25 2484 N

06/30/98 Metolachlor 6.1 1706 N 06/24/98 Simazine 0.13 268 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-3

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-2 Station WB-409, Wabash River at Huntington

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/06/98 Acetochlor 0.5 758 Y 06/24/98 Atrazine 13 1940 N

05/06/98 Acetochlor 0.4 758 N 06/30/98 Atrazine 7.5 616 N

05/13/98 Acetochlor 1.9 406 N 07/08/98 Atrazine 2.9 1770 N

05/20/98 Acetochlor 1.1 153 N 07/15/98 Atrazine 1.1 235 N

05/29/98 Acetochlor 2.0 107 N 07/21/98 Atrazine 1.5 338 N

06/05/98 Acetochlor 1.0 152 N 07/29/98 Atrazine 0.8 4050 N

06/11/98 Acetochlor 1.0 115 N

06/17/98 Acetochlor 5.8 2230 N 04/20/98 Clomazone 0.1 2260 N

06/24/98 Acetochlor 2.5 1940 N 06/17/98 Clomazone 0.6 2230 N

06/30/98 Acetochlor 1.1 616 N 06/24/98 Clomazone 0.3 1940 N

07/08/98 Acetochlor 0.5 1770 N 06/30/98 Clomazone 0.2 616 N

07/15/98 Acetochlor 0.2 235 N

07/21/98 Acetochlor 0.2 338 N 05/29/98 Cyanazine 0.3 107 N

07/29/98 Acetochlor 0.2 4050 N 06/05/98 Cyanazine 0.3 152 N

06/11/98 Cyanazine 0.3 115 N

05/29/98 Alachlor 0.1 107 N 06/24/98 Cyanazine 0.7 1940 N

06/17/98 Alachlor 0.5 2230 N 06/30/98 Cyanazine 0.4 616 N

06/24/98 Alachlor 0.3 1940 N

06/30/98 Alachlor 0.2 616 N 04/20/98 Di(2-ethylhexyl)phthalate 0.7 2260 N

07/08/98 Alachlor 0.1 1770 N 04/27/98 Di(2-ethylhexyl)phthalate 1.5 303 N

05/06/98 Di(2-ethylhexyl)phthalate 1.9 758 Y

04/20/98 Atrazine 0.2 2260 N 05/06/98 Di(2-ethylhexyl)phthalate 2.8 758 N

04/27/98 Atrazine 0.3 303 N 06/30/98 Di(2-ethylhexyl)phthalate 0.7 616 N

05/06/98 Atrazine 0.3 758 Y

05/06/98 Atrazine 0.6 758 N 06/30/98 Diethylphthalate 1.1 616 N

05/13/98 Atrazine 3.0 406 N

05/20/98 Atrazine 1.7 153 N 04/27/98 Di-n-butylphthalate 2.4 303 N

05/29/98 Atrazine 5.7 107 N 05/06/98 Di-n-butylphthalate 1.8 758 Y

06/05/98 Atrazine 3.9 152 N 05/06/98 Di-n-butylphthalate 3.5 758 N

06/11/98 Atrazine 4.9 115 N 06/30/98 Di-n-butylphthalate 1.3 616 N

06/17/98 Atrazine 21 2230 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-4

Table IV-2 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/20/98 Metolachlor 0.3 2260 N 06/24/98 Metolachlor 6.7 1940 N

04/27/98 Metolachlor 0.3 303 N 06/30/98 Metolachlor 3.6 616 N

05/06/98 Metolachlor 0.7 758 N 07/08/98 Metolachlor 2.8 1770 N

05/06/98 Metolachlor 0.8 758 Y 07/15/98 Metolachlor 1.6 235 N

05/13/98 Metolachlor 3.0 406 N 07/21/98 Metolachlor 1.8 338 N

05/20/98 Metolachlor 2.1 153 N 07/29/98 Metolachlor 1.1 4050 N

05/29/98 Metolachlor 3.3 107 N

06/05/98 Metolachlor 2.2 152 N 05/29/98 Simazine 0.18 107 N

06/11/98 Metolachlor 2.1 115 N 06/24/98 Simazine 0.30 1940 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-5

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-3 Station LR-8, Little River near Huntington

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/13/98 Acetochlor 0.2 98 N 04/20/98 Di(2-ethylhexyl)phthalate 0.9 264 N

05/20/98 Acetochlor 0.2 175 N

05/29/98 Acetochlor 0.2 46 N 04/27/98 Di(2-ethylhexyl)phthalate 1.0 107 N

06/11/98 Acetochlor 0.1 46 N

06/17/98 Acetochlor 2.1 215 N 04/27/98 Di-n-butylphthalate 1.7 107 N

06/24/98 Acetochlor 0.3 58 N

07/08/98 Acetochlor 0.2 102 N 04/20/98 Metolachlor 0.2 264 N

07/15/98 Acetochlor 0.1 35 N 04/27/98 Metolachlor 0.1 107 N

05/13/98 Metolachlor 0.6 98 N

06/17/98 Alachlor 0.1 215 N 05/20/98 Metolachlor 0.4 175 N

05/29/98 Metolachlor 0.4 46 N

04/27/98 Atrazine 0.1 107 N 06/05/98 Metolachlor 0.3 39 N

05/13/98 Atrazine 0.5 98 N 06/11/98 Metolachlor 0.2 46 N

05/20/98 Atrazine 0.5 175 N 06/17/98 Metolachlor 5.1 215 N

05/29/98 Atrazine 0.7 46 N 06/24/98 Metolachlor 1.1 58 N

06/05/98 Atrazine 0.5 39 N 07/08/98 Metolachlor 1.3 102 N

06/11/98 Atrazine 0.5 46 N 07/15/98 Metolachlor 0.5 35 N

06/17/98 Atrazine 7.9 215 N 07/21/98 Metolachlor 0.4 39 N

06/24/98 Atrazine 1.6 58 N 07/29/98 Metolachlor 0.6 104 N

07/08/98 Atrazine 1.2 102 N

07/15/98 Atrazine 0.6 35 N

07/21/98 Atrazine 0.4 39 N

07/29/98 Atrazine 0.6 104 N

06/17/98 Clomazone 0.1 215 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-6
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-7

Appendix IV. Herbicide Concentrations and Stream Flow

Table IV-4 Station S-30, Salamonie River near Warren

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/06/98 Acetochlor 0.2 245 N 06/05/98 Clomazone 0.2 65 N

05/13/98 Acetochlor 0.6 211 N 06/11/98 Clomazone 0.2 86 N

05/20/98 Acetochlor 0.4 102 N 06/17/98 Clomazone 0.2 2778 N

05/29/98 Acetochlor 2.0 59 N 06/24/98 Clomazone 0.1 136 N

06/05/98 Acetochlor 5.1 65 N 07/08/98 Clomazone 0.1 5412 N

06/11/98 Acetochlor 2.0 86 N

06/17/98 Acetochlor 3.6 2778 N 05/29/98 Cyanazine 0.3 59 N

06/24/98 Acetochlor 0.6 136 N 06/05/98 Cyanazine 0.6 65 N

06/30/98 Acetochlor 2.6 1450 N 06/11/98 Cyanazine 0.3 86 N

06/30/98 Acetochlor 2.7 1450 Y 06/17/98 Cyanazine 0.5 2778 N

07/08/98 Acetochlor 0.4 5412 N 06/24/98 Cyanazine 0.5 136 N

07/15/98 Acetochlor 0.1 115 N

07/21/98 Acetochlor 1.2 394 N 04/27/98 Di(2-ethylhexyl)adipate 0.7 675 N

06/05/98 Alachlor 0.2 65 N 04/20/98 Di(2-ethylhexyl)phthalate 0.9 234 N

06/17/98 Alachlor 0.2 2778 N 06/30/98 Di(2-ethylhexyl)phthalate 1.0 1450 N

06/30/98 Di(2-ethylhexyl)phthalate 0.7 1450 Y

05/06/98 Atrazine 0.6 245 N

05/13/98 Atrazine 1.2 211 N 04/27/98 Dimethylphthalate 4.8 675 N

05/20/98 Atrazine 0.9 102 N

05/29/98 Atrazine 7.4 59 N 04/27/98 Di-n-butylphthalate 7.0 675 N

06/05/98 Atrazine 17 65 N

06/11/98 Atrazine 8.9 86 N

06/17/98 Atrazine 17 2778 N

06/24/98 Atrazine 6.0 136 N

06/30/98 Atrazine 7.5 1450 N

06/30/98 Atrazine 5.1 1450 Y

07/08/98 Atrazine 2.7 5412 N

07/15/98 Atrazine 1.1 115 N

07/21/98 Atrazine 4.3 394 N

07/29/98 Atrazine 0.7 228 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-8

Table IV-4 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/20/98 Metolachlor 0.1 234 N 06/30/98 Metolachlor 5.0 1450 Y

04/27/98 Metolachlor 3.3 675 N 06/30/98 Metolachlor 4.5 1450 N

05/06/98 Metolachlor 0.3 245 N 07/08/98 Metolachlor 1.3 5412 N

05/13/98 Metolachlor 1.1 211 N 07/15/98 Metolachlor 0.5 115 N

05/20/98 Metolachlor 0.4 102 N 07/21/98 Metolachlor 1.1 394 N

05/29/98 Metolachlor 1.5 59 N 07/29/98 Metolachlor 0.3 228 N

06/05/98 Metolachlor 2.6 65 N

06/11/98 Metolachlor 2.3 86 N 05/29/98 Simazine 0.60 59 N

06/17/98 Metolachlor 4.5 2778 N 06/05/98 Simazine 0.58 65 N

06/24/98 Metolachlor 1.3 136 N 06/24/98 Simazine 0.12 136 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-9

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-5 Station S-3, Salamonie River at Dora

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/06/98 Acetochlor 0.4 560 N 07/29/98 Atrazine 1.9 133 N

05/13/98 Acetochlor 0.9 1380 N

05/20/98 Acetochlor 1.6 120 N 06/05/98 Clomazone 0.1 86 N

05/29/98 Acetochlor 2.1 79 N 06/11/98 Clomazone 0.1 95 N

06/05/98 Acetochlor 2.4 86 N 06/30/98 Clomazone 0.4 4030 N

06/11/98 Acetochlor 2.1 95 N 07/08/98 Clomazone 0.2 1390 N

06/17/98 Acetochlor 2.1 104 N 07/15/98 Clomazone 0.2 4180 N

06/24/98 Acetochlor 2.7 1590 N 07/21/98 Clomazone 0.2 454 N

06/30/98 Acetochlor 4.4 4030 N

07/08/98 Acetochlor 2.0 1390 N 06/24/98 Cyanazine 0.6 1590 N

07/15/98 Acetochlor 1.5 4180 N 07/29/98 Cyanazine 0.2 133 N

07/21/98 Acetochlor 0.9 454 N

07/29/98 Acetochlor 0.7 133 N 04/20/98 Di(2-ethylhexyl)phthalate 1.1 2070 N

04/27/98 Di(2-ethylhexyl)phthalate 1.8 1570 N

06/30/98 Alachlor 0.3 4030 N 06/24/98 Di(2-ethylhexyl)phthalate 0.8 1590 N

07/08/98 Alachlor 0.1 1390 N

07/15/98 Alachlor 0.1 4180 N 04/27/98 Di-n-butylphthalate 3.8 1570 N

04/20/98 Atrazine 0.2 2070 N

05/06/98 Atrazine 0.5 560 N

05/13/98 Atrazine 1.2 1380 N

05/20/98 Atrazine 2.3 120 N

05/29/98 Atrazine 4.5 79 N

06/05/98 Atrazine 5.4 86 N

06/11/98 Atrazine 4.9 95 N

06/17/98 Atrazine 5.4 104 N

06/24/98 Atrazine 9.1 1590 N

06/30/98 Atrazine 2.8 4030 N

07/08/98 Atrazine 1.5 1390 N

07/15/98 Atrazine 2.1 4180 N

07/21/98 Atrazine 1.7 454 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-10

Table IV-5 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/20/98 Metolachlor 0.2 2070 N 06/30/98 Metolachlor 5.8 4030 N

04/27/98 Metolachlor 0.2 1570 N 07/08/98 Metolachlor 2.6 1390 N

05/06/98 Metolachlor 0.3 560 N 07/15/98 Metolachlor 2.7 4180 N

05/13/98 Metolachlor 0.8 1380 N 07/21/98 Metolachlor 2.1 454 N

05/20/98 Metolachlor 1.2 120 N 07/29/98 Metolachlor 1.7 133 N

05/29/98 Metolachlor 1.9 79 N

06/05/98 Metolachlor 2.0 86 N 06/11/98 Metribuzin 0.2 95 N

06/11/98 Metolachlor 1.8 95 N

06/17/98 Metolachlor 2.1 104 N 06/05/98 Simazine 0.21 86 N

06/24/98 Metolachlor 2.8 1590 N 06/24/98 Simazine 0.15 1590 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-11

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-6 Station WB-387, Wabash River at Wabash

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Acetochlor 0.3 1596 N 07/16/98 Atrazine 2.0 4764 N

05/14/98 Acetochlor 0.3 1488 N 07/22/98 Atrazine 0.7 16900 N

05/21/98 Acetochlor 2.0 474 N 07/30/98 Atrazine 0.8 5057 N

05/29/98 Acetochlor 1.1 391 N

06/05/98 Acetochlor 1.1 466 N 04/21/98 Clomazone 0.1 4278 N

06/11/98 Acetochlor 1.0 453 N 06/18/98 Clomazone 0.6 3675 N

06/18/98 Acetochlor 5.2 3675 N 06/25/98 Clomazone 0.2 25 N

06/25/98 Acetochlor 2.6 25 N 07/01/98 Clomazone 0.3 5035 N

07/01/98 Acetochlor 3.6 5035 N 07/09/98 Clomazone 0.2 4403 N

07/09/98 Acetochlor 2.4 4403 N 07/16/98 Clomazone 0.2 4764 N

07/16/98 Acetochlor 1.4 4764 N

07/22/98 Acetochlor 0.2 16900 N 06/11/98 Cyanazine 0.4 453 N

07/30/98 Acetochlor 0.2 5057 N 06/25/98 Cyanazine 0.8 25 N

07/01/98 Cyanazine 0.5 5035 N

06/18/98 Alachlor 0.5 3675 N 07/09/98 Cyanazine 0.6 4403 N

06/25/98 Alachlor 0.2 25 N 07/16/98 Cyanazine 0.4 4764 N

07/01/98 Alachlor 0.3 5035 N

07/09/98 Alachlor 0.2 4403 N 04/21/98 Di(2-ethylhexyl)phthalate 1.3 4278 N

06/25/98 Di(2-ethylhexyl)phthalate 0.8 25 N

04/21/98 Atrazine 0.2 4278 N 07/30/98 Di(2-ethylhexyl)phthalate 0.9 5057 N

04/28/98 Atrazine 0.1 834 N

05/07/98 Atrazine 0.7 1596 N 04/28/98 Di-n-butylphthalate 1.1 834 N

05/14/98 Atrazine 0.6 1488 N

05/21/98 Atrazine 2.7 474 N

05/29/98 Atrazine 3.2 391 N

06/05/98 Atrazine 3.6 466 N

06/11/98 Atrazine 3.9 453 N

06/18/98 Atrazine 18 3675 N

06/25/98 Atrazine 10 25 N

07/01/98 Atrazine 3.6 5035 N

07/09/98 Atrazine 3.2 4403 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-12

Table IV-6 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/21/98 Metolachlor 0.2 4278 N 06/18/98 Metolachlor 10 3675 N

04/28/98 Metolachlor 0.2 834 N 06/25/98 Metolachlor 4.1 25 N

05/07/98 Metolachlor 0.6 1596 N 07/01/98 Metolachlor 5.6 5035 N

05/14/98 Metolachlor 0.5 1488 N 07/09/98 Metolachlor 4.5 4403 N

05/21/98 Metolachlor 1.5 474 N 07/16/98 Metolachlor 2.7 4764 N

05/29/98 Metolachlor 1.9 391 N 07/22/98 Metolachlor 0.7 16900 N

06/05/98 Metolachlor 1.7 466 N 07/30/98 Metolachlor 1.2 5057 N

06/11/98 Metolachlor 1.5 453 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-13

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-7 Station MS-100, Mississinewa River near Ridgeville

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/13/98 Acetochlor 0.1 57 N 05/20/98 Clomazone 1.5 142 N

05/20/98 Acetochlor 14 142 N 06/17/98 Clomazone 0.2 552 N

05/29/98 Acetochlor 0.2 26 N

06/05/98 Acetochlor 0.4 29 N 06/05/98 Cyanazine 0.2 29 N

06/11/98 Acetochlor 5.9 1617 N 06/11/98 Cyanazine 3.8 1617 N

06/11/98 Acetochlor 5.5 1617 Y 06/24/98 Cyanazine 0.2 57 N

06/17/98 Acetochlor 0.8 552 N

06/24/98 Acetochlor 0.3 57 N 04/20/98 Di(2-ethylhexyl)phthalate 0.8 56 N

06/30/98 Acetochlor 0.9 725 N 06/11/98 Di(2-ethylhexyl)phthalate 2.0 1617 Y

07/08/98 Acetochlor 0.2 174 N 06/11/98 Di(2-ethylhexyl)phthalate 1.1 1617 N

06/30/98 Di(2-ethylhexyl)phthalate 1.0 725 N

06/11/98 Alachlor 0.2 1617 N

06/11/98 Alachlor 0.2 1617 Y 04/27/98 Di-n-butylphthalate 1.0 76 N

06/30/98 Alachlor 0.1 725 N

04/20/98 Metolachlor 0.2 56 N

04/20/98 Atrazine 0.2 56 N 04/27/98 Metolachlor 0.4 76 N

04/27/98 Atrazine 0.3 76 N 05/13/98 Metolachlor 0.4 57 N

05/13/98 Atrazine 0.6 57 N 05/20/98 Metolachlor 37 142 N

05/20/98 Atrazine 32 142 N 05/29/98 Metolachlor 0.9 26 N

05/29/98 Atrazine 1.5 26 N 06/05/98 Metolachlor 6.4 29 N

06/05/98 Atrazine 6.8 29 N 06/11/98 Metolachlor 41 1617 N

06/11/98 Atrazine 36 1617 N 06/11/98 Metolachlor 38 1617 Y

06/11/98 Atrazine 38 1617 Y 06/17/98 Metolachlor 8.1 552 N

06/17/98 Atrazine 7.3 552 N 06/24/98 Metolachlor 2.1 57 N

06/24/98 Atrazine 3.1 57 N 06/30/98 Metolachlor 6.2 725 N

06/30/98 Atrazine 4.5 725 N 07/08/98 Metolachlor 1.4 174 N

07/08/98 Atrazine 1.5 174 N 07/15/98 Metolachlor 0.5 23 N

07/15/98 Atrazine 0.5 23 N 07/21/98 Metolachlor 0.6 578 N

07/21/98 Atrazine 0.6 578 N 07/29/98 Metolachlor 0.6 25 N

07/29/98 Atrazine 0.1 25 N

04/27/98 Metribuzin 0.6 76 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-14

Table IV-7 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

06/11/98 Pendimethalin 0.2 1617 Y 06/17/98 Simazine 0.12 552 N

06/24/98 Simazine 0.09 57 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-15

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-8 Station MS-36, Mississinewa River at Marion

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/06/98 Acetochlor 0.5 599 N 07/29/98 Atrazine 0.2 362 N

05/13/98 Acetochlor 0.3 4805 N

05/20/98 Acetochlor 0.2 223 N 06/11/98 Bromacil 0.7 644 N

05/29/98 Acetochlor 1.0 206 N

06/05/98 Acetochlor 3.9 232 N 04/30/98 Clomazone 0.1 457 Y

06/11/98 Acetochlor 0.7 644 N 05/06/98 Clomazone 0.1 599 N

06/17/98 Acetochlor 1.6 6544 N 06/05/98 Clomazone 0.1 232 N

06/24/98 Acetochlor 0.5 431 N 06/17/98 Clomazone 0.2 6544 N

06/30/98 Acetochlor 0.2 588 N 06/30/98 Clomazone 0.2 588 N

07/08/98 Acetochlor 0.2 2618 N

05/29/98 Cyanazine 0.2 206 N

06/05/98 Alachlor 0.3 232 N 06/05/98 Cyanazine 1.3 232 N

06/11/98 Alachlor 0.1 644 N 06/17/98 Cyanazine 0.5 6544 N

06/17/98 Alachlor 0.2 6544 N 06/24/98 Cyanazine 0.7 431 N

07/21/98 Alachlor 0.2 217 N 07/15/98 Cyanazine 0.1 264 N

04/20/98 Atrazine 0.2 610 N 04/20/98 Di(2-ethylhexyl)phthalate 0.7 610 N

04/30/98 Atrazine 0.2 457 Y 04/30/98 Di(2-ethylhexyl)phthalate 1.0 457 N

04/30/98 Atrazine 0.1 457 N 05/06/98 Di(2-ethylhexyl)phthalate 1.3 599 N

05/06/98 Atrazine 1.3 599 N 06/24/98 Di(2-ethylhexyl)phthalate 1.2 431 N

05/13/98 Atrazine 1.3 4805 N

05/20/98 Atrazine 0.8 223 N 04/30/98 Di-n-butylphthalate 2.9 457 N

05/29/98 Atrazine 4.3 206 N 05/06/98 Di-n-butylphthalate 1.3 599 N

06/05/98 Atrazine 23 232 N

06/11/98 Atrazine 5.9 644 N 06/11/98 Fluoranthene 0.2 644 N

06/17/98 Atrazine 13 6544 N

06/24/98 Atrazine 5.7 431 N

06/30/98 Atrazine 2.2 588 N

07/08/98 Atrazine 2.0 2618 N

07/15/98 Atrazine 0.8 264 N

07/21/98 Atrazine 0.9 217 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-16

Table IV-8 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/20/98 Metolachlor 0.2 610 N 07/08/98 Metolachlor 1.2 2618 N

04/30/98 Metolachlor 0.2 457 Y 07/15/98 Metolachlor 0.5 264 N

04/30/98 Metolachlor 0.2 457 N 07/21/98 Metolachlor 0.7 217 N

05/06/98 Metolachlor 0.7 599 N 07/29/98 Metolachlor 0.4 362 N

05/13/98 Metolachlor 0.8 4805 N

05/20/98 Metolachlor 0.3 223 N 04/30/98 Metribuzin 0.1 457 Y

05/29/98 Metolachlor 2.2 206 N

06/05/98 Metolachlor 6.7 232 N 06/11/98 Pyrene 0.2 644 N

06/11/98 Metolachlor 1.9 644 N

06/17/98 Metolachlor 6.4 6544 N 05/29/98 Simazine 0.29 206 N

06/24/98 Metolachlor 1.8 431 N 06/05/98 Simazine 1.5 232 N

06/30/98 Metolachlor 0.9 588 N 06/24/98 Simazine 0.15 431 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-17

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-9 Station MS-7, Mississinewa River at Peoria

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/14/98 Acetochlor 0.2 466 N 06/04/98 Clomazone 0.1 601 N

05/21/98 Acetochlor 0.3 217 N 06/10/98 Clomazone 0.1 288 N

05/28/98 Acetochlor 0.4 288 N 06/18/98 Clomazone 0.1 1350 N

06/04/98 Acetochlor 0.7 601 N 06/25/98 Clomazone 0.3 5270 N

06/10/98 Acetochlor 0.6 288 N 07/01/98 Clomazone 0.2 3240 N

06/18/98 Acetochlor 1.6 1350 N 07/09/98 Clomazone 0.2 1540 N

06/25/98 Acetochlor 2.5 5270 N

07/01/98 Acetochlor 1.7 3240 N 05/28/98 Cyanazine 0.2 288 N

07/09/98 Acetochlor 0.9 1540 N 06/10/98 Cyanazine 0.4 288 N

07/16/98 Acetochlor 0.4 4770 N 06/18/98 Cyanazine 0.8 1350 N

07/22/98 Acetochlor 0.6 90 N 06/25/98 Cyanazine 1.6 5270 N

07/30/98 Acetochlor 0.2 3940 N 07/01/98 Cyanazine 0.8 3240 N

07/09/98 Cyanazine 0.5 1540 N

06/25/98 Alachlor 0.2 5270 N 07/16/98 Cyanazine 0.3 4770 N

07/01/98 Alachlor 0.1 3240 N 07/30/98 Cyanazine 0.2 3940 N

07/09/98 Alachlor 0.1 1540 N

04/21/98 Di(2-ethylhexyl)phthalate 1.2 4200 N

04/21/98 Atrazine 0.2 4200 N 04/28/98 Di(2-ethylhexyl)phthalate 1.8 466 N

04/28/98 Atrazine 0.3 466 N

05/14/98 Atrazine 0.7 466 N 04/28/98 Di-n-butylphthalate 4.5 466 N

05/21/98 Atrazine 1.4 217 N 05/07/98 Di-n-butylphthalate 1.1 467 N

05/28/98 Atrazine 2.8 288 N

06/04/98 Atrazine 4.4 601 N

06/10/98 Atrazine 4.3 288 N

06/18/98 Atrazine 9.3 1350 N

06/25/98 Atrazine 17 5270 N

07/01/98 Atrazine 12 3240 N

07/09/98 Atrazine 6.5 1540 N

07/16/98 Atrazine 1.6 4770 N

07/22/98 Atrazine 1.0 90 N

07/30/98 Atrazine 1.0 3940 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-18

Table IV-9 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/21/98 Metolachlor 0.3 4200 N 07/01/98 Metolachlor 5.5 3240 N

04/28/98 Metolachlor 0.3 466 N 07/09/98 Metolachlor 3.9 1540 N

05/07/98 Metolachlor 0.5 467 N 07/16/98 Metolachlor 2.1 4770 N

05/14/98 Metolachlor 0.6 466 N 07/22/98 Metolachlor 2.7 90 N

05/21/98 Metolachlor 0.8 217 N 07/30/98 Metolachlor 1.2 3940 N

05/28/98 Metolachlor 1.2 288 N

06/04/98 Metolachlor 1.6 601 N 05/28/98 Simazine 0.21 288 N

06/10/98 Metolachlor 1.5 288 N 06/04/98 Simazine 0.32 601 N

06/18/98 Metolachlor 2.4 1350 N 06/10/98 Simazine 0.27 288 N

06/25/98 Metolachlor 7.0 5270 N 06/18/98 Simazine 0.47 1350 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-19

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-10 Station WB-370, Wabash River at Peru

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Acetochlor 0.3 2500 N 07/09/98 Atrazine 3.3 5141 N

05/14/98 Acetochlor 0.7 2072 N 07/30/98 Atrazine 1.0 8531 N

05/21/98 Acetochlor 1.1 757 N

05/28/98 Acetochlor 0.8 861 N 07/01/98 Clomazone 0.3 8512 N

06/04/98 Acetochlor 1.1 1548 N 07/09/98 Clomazone 0.2 5141 N

06/10/98 Acetochlor 0.7 677 N 07/16/98 Clomazone 0.1 8796 N

06/18/98 Acetochlor 5.2 5050 N

06/25/98 Acetochlor 2.7 7342 N 05/14/98 Cyanazine 0.4 2072 N

07/01/98 Acetochlor 3.7 8512 N 06/25/98 Cyanazine 1.0 7342 N

07/09/98 Acetochlor 1.8 5141 N 07/09/98 Cyanazine 0.3 5141 N

07/16/98 Acetochlor 1.2 8796 N

07/22/98 Acetochlor 0.2 2420 N 04/21/98 Di(2-ethylhexyl)phthalate 0.6 8399 N

07/30/98 Acetochlor 0.2 8531 N 07/22/98 Di(2-ethylhexyl)phthalate 0.7 2420 N

06/18/98 Alachlor 0.5 5050 N 04/28/98 Di-n-butylphthalate 1.4 1503 N

06/25/98 Alachlor 0.2 7342 N 05/07/98 Di-n-butylphthalate 1.1 2500 N

07/01/98 Alachlor 0.3 8512 N 05/21/98 Di-n-butylphthalate 1.1 757 N

07/09/98 Alachlor 0.1 5141 N

07/16/98 Alachlor 0.1 8796 N 06/18/98 Fluoranthene 0.7 5050 N

07/16/98 Fluoranthene 1.5 8796 N

04/21/98 Atrazine 0.2 8399 N

04/28/98 Atrazine 0.2 1503 N

05/07/98 Atrazine 0.7 2500 N

05/14/98 Atrazine 1.8 2072 N

05/21/98 Atrazine 1.8 757 N

05/28/98 Atrazine 2.6 861 N

06/04/98 Atrazine 4.1 1548 N

06/10/98 Atrazine 3.7 677 N

06/18/98 Atrazine 15 5050 N

06/25/98 Atrazine 13 7342 N

07/01/98 Atrazine 6.0 8512 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-20

Table IV-10 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/21/98 Metolachlor 0.2 8399 N 06/25/98 Metolachlor 6.1 7342 N

04/28/98 Metolachlor 0.2 1503 N 07/01/98 Metolachlor 7.0 8512 N

05/07/98 Metolachlor 0.6 2500 N 07/09/98 Metolachlor 3.4 5141 N

05/14/98 Metolachlor 1.0 2072 N 07/16/98 Metolachlor 2.9 8796 N

05/21/98 Metolachlor 1.2 757 N 07/22/98 Metolachlor 1.0 2420 N

05/28/98 Metolachlor 1.8 861 N 07/30/98 Metolachlor 1.2 8531 N

06/04/98 Metolachlor 2.1 1548 N

06/10/98 Metolachlor 1.4 677 N 07/16/98 Pyrene 1.2 8796 N

06/18/98 Metolachlor 11 5050 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-21

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-11 Station PIP-11, Pipe Creek near Bunker Hill

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/21/98 Acetochlor 0.6 117 N 04/28/98 Clomazone 0.3 95 N

04/28/98 Acetochlor 2.1 95 N 06/18/98 Clomazone 0.2 452 N

05/14/98 Acetochlor 0.9 127 N 07/09/98 Clomazone 0.1 771 N

05/21/98 Acetochlor 0.3 74 N 07/22/98 Clomazone 0.1 2841 N

05/22/98 Acetochlor 0.4 74 Y

05/28/98 Acetochlor 0.2 54 N 05/28/98 Cyanazine 0.3 54 N

06/04/98 Acetochlor 0.4 37 N 06/04/98 Cyanazine 0.2 37 N

06/10/98 Acetochlor 0.1 34 N 06/18/98 Cyanazine 0.7 452 N

06/18/98 Acetochlor 0.6 452 N 06/25/98 Cyanazine 0.4 103 N

06/25/98 Acetochlor 0.2 103 N

07/01/98 Acetochlor 0.2 205 N 04/21/98 Di(2-ethylhexyl)phthalate 2.3 117 N

07/09/98 Acetochlor 0.1 771 N 04/28/98 Di(2-ethylhexyl)phthalate 1.4 95 N

07/22/98 Acetochlor 0.1 2841 N 05/07/98 Di(2-ethylhexyl)phthalate 0.7 174 N

07/16/98 Di(2-ethylhexyl)phthalate 0.6 86 N

04/28/98 Alachlor 0.2 95 N

07/09/98 Fluoranthene 0.3 771 N

04/21/98 Atrazine 0.4 117 N

04/28/98 Atrazine 4.2 95 N

05/14/98 Atrazine 1.8 127 N

05/21/98 Atrazine 1.0 74 N

05/22/98 Atrazine 1.0 74 Y

05/28/98 Atrazine 1.6 54 N

06/04/98 Atrazine 0.8 37 N

06/10/98 Atrazine 0.6 34 N

06/18/98 Atrazine 5.2 452 N

06/25/98 Atrazine 1.7 103 N

07/01/98 Atrazine 2.1 205 N

07/09/98 Atrazine 1.1 771 N

07/16/98 Atrazine 0.4 86 N

07/22/98 Atrazine 0.4 2841 N

07/30/98 Atrazine 0.3 123 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-22

Table IV-11 Continued

RESULT FLOW DUPLICAT RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/21/98 Metolachlor 0.7 117 N 06/10/98 Metolachlor 0.5 34 N

04/28/98 Metolachlor 5.6 95 N 06/18/98 Metolachlor 4.5 452 N

05/07/98 Metolachlor 1.8 174 N 06/25/98 Metolachlor 2.3 103 N

05/14/98 Metolachlor 1.2 127 N 07/01/98 Metolachlor 2.2 205 N

05/21/98 Metolachlor 1.8 74 N 07/09/98 Metolachlor 2.7 771 N

05/22/98 Metolachlor 2.0 74 Y 07/16/98 Metolachlor 0.2 86 N

05/28/98 Metolachlor 1.1 54 N 07/22/98 Metolachlor 1.6 2841 N

06/04/98 Metolachlor 0.5 37 N 07/30/98 Metolachlor 1.0 123 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-23

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-12 Station ELL-53, Eel River at North Manchester

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Acetochlor 0.2 411 N 04/28/98 Di(2-ethylhexyl)phthalate 1.1 284 N

05/21/98 Acetochlor 0.2 159 N 06/10/98 Di(2-ethylhexyl)phthalate 0.7 110 N

05/28/98 Acetochlor 0.5 452 N

06/04/98 Acetochlor 0.2 110 N 04/28/98 Di-n-butylphthalate 1.8 284 N

06/18/98 Acetochlor 2.5 441 N

06/25/98 Acetochlor 0.3 157 N 04/28/98 Metolachlor 0.1 284 N

07/01/98 Acetochlor 0.9 229 N 05/07/98 Metolachlor 0.4 411 N

07/09/98 Acetochlor 0.3 300 N 05/14/98 Metolachlor 0.2 244 N

07/16/98 Acetochlor 0.1 108 N 05/21/98 Metolachlor 0.2 159 N

07/22/98 Acetochlor 0.3 6683 N 05/28/98 Metolachlor 0.2 452 N

06/04/98 Metolachlor 0.2 110 N

06/18/98 Alachlor 0.2 441 N 06/10/98 Metolachlor 0.1 110 N

06/18/98 Metolachlor 5.0 441 N

05/07/98 Atrazine 0.6 411 N 06/25/98 Metolachlor 0.9 157 N

05/14/98 Atrazine 0.3 244 N 07/01/98 Metolachlor 2.6 229 N

05/21/98 Atrazine 0.2 159 N 07/09/98 Metolachlor 1.1 300 N

05/28/98 Atrazine 0.6 452 N 07/16/98 Metolachlor 0.2 108 N

06/04/98 Atrazine 0.3 110 N 07/22/98 Metolachlor 0.6 6683 N

06/10/98 Atrazine 0.2 110 N 07/30/98 Metolachlor 0.3 210 N

06/18/98 Atrazine 8.3 441 N

06/25/98 Atrazine 1.4 157 N

07/01/98 Atrazine 2.9 229 N

07/09/98 Atrazine 1.5 300 N

07/16/98 Atrazine 0.4 108 N

07/22/98 Atrazine 0.5 6683 N

07/30/98 Atrazine 0.4 210 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-24
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-25

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-13 Station ELL-7, Eel River near Logansport

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/28/98 Acetochlor 0.1 705 N 07/09/98 Atrazine 0.9 1185 N

05/07/98 Acetochlor 0.5 2832 N 07/16/98 Atrazine 0.6 417 N

05/21/98 Acetochlor 14 686 N 07/22/98 Atrazine 0.5 9110 N

05/28/98 Acetochlor 1.7 452 N 07/30/98 Atrazine 0.4 811 N

06/04/98 Acetochlor 1.2 388 N

06/10/98 Acetochlor 0.2 369 N 04/21/98 Di(2-ethylhexyl)phthalate 0.8 1040 N

06/18/98 Acetochlor 3.3 1543 N 04/28/98 Di(2-ethylhexyl)phthalate 0.8 705 N

06/25/98 Acetochlor 0.4 521 N 07/30/98 Di(2-ethylhexyl)phthalate 0.6 811 N

07/01/98 Acetochlor 0.4 537 N

07/09/98 Acetochlor 0.4 1185 N 04/21/98 Di-n-butylphthalate 1.8 1040 N

07/22/98 Acetochlor 0.1 9110 N 04/28/98 Di-n-butylphthalate 1.4 705 N

05/28/98 Alachlor 0.2 452 N 05/07/98 Metolachlor 1.0 2832 N

06/04/98 Alachlor 0.1 388 N 05/14/98 Metolachlor 0.3 731 N

06/10/98 Alachlor 0.2 369 N 05/21/98 Metolachlor 9.9 686 N

06/18/98 Alachlor 0.3 1543 N 05/28/98 Metolachlor 0.5 452 N

06/25/98 Alachlor 0.1 521 N 06/04/98 Metolachlor 0.4 388 N

07/01/98 Alachlor 0.2 537 N 06/10/98 Metolachlor 0.2 369 N

07/09/98 Alachlor 0.1 1185 N 06/18/98 Metolachlor 6.6 1543 N

06/25/98 Metolachlor 1.1 521 N

04/21/98 Atrazine 0.1 1040 N 07/01/98 Metolachlor 0.8 537 N

04/28/98 Atrazine 0.2 705 N 07/09/98 Metolachlor 1.2 1185 N

05/07/98 Atrazine 1.5 2832 N 07/16/98 Metolachlor 0.3 417 N

05/14/98 Atrazine 0.2 731 N 07/22/98 Metolachlor 0.5 9110 N

05/21/98 Atrazine 18 686 N 07/30/98 Metolachlor 0.3 811 N

05/28/98 Atrazine 2.2 452 N

06/04/98 Atrazine 1.4 388 N 05/21/98 Propachlor 0.1 686 N

06/10/98 Atrazine 0.6 369 N

06/18/98 Atrazine 8.8 1543 N

06/25/98 Atrazine 2.2 521 N

07/01/98 Atrazine 1.0 537 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-26
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-27

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-14 Station WB-354, Wabash River at Logansport

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Acetochlor 0.5 3820 N 07/30/98 Atrazine 0.6 10500 N

05/14/98 Acetochlor 0.7 3280 N

05/21/98 Acetochlor 0.7 1631 N 05/28/98 Clomazone 0.1 1445 N

05/28/98 Acetochlor 0.8 1445 N 07/01/98 Clomazone 0.3 10210 N

06/04/98 Acetochlor 1.0 1932 N 07/09/98 Clomazone 0.2 8672 N

06/10/98 Acetochlor 0.4 1113 N

06/18/98 Acetochlor 4.6 7250 N 05/28/98 Cyanazine 0.4 1445 N

06/25/98 Acetochlor 2.7 8764 N 06/04/98 Cyanazine 0.6 1932 N

07/01/98 Acetochlor 2.7 10210 N 06/10/98 Cyanazine 0.4 1113 N

07/09/98 Acetochlor 1.2 8672 N

07/16/98 Acetochlor 0.1 9987 N 04/21/98 Di(2-ethylhexyl)phthalate 0.8 9923 N

07/22/98 Acetochlor 0.2 36960 N 04/28/98 Di(2-ethylhexyl)phthalate 1.2 2546 N

07/30/98 Acetochlor 0.2 10500 N 07/09/98 Di(2-ethylhexyl)phthalate 0.7 8672 N

07/22/98 Di(2-ethylhexyl)phthalate 4.9 36960 N

06/25/98 Alachlor 0.3 8764 N

07/01/98 Alachlor 0.2 10210 N 04/28/98 Di-n-butylphthalate 3.2 2546 N

07/22/98 Alachlor 0.1 36960 N 05/07/98 Di-n-butylphthalate 1.6 3820 N

04/21/98 Atrazine 0.2 9923 N

05/07/98 Atrazine 0.8 3820 N

05/14/98 Atrazine 1.0 3280 N

05/21/98 Atrazine 1.6 1631 N

05/28/98 Atrazine 3.4 1445 N

06/04/98 Atrazine 4.5 1932 N

06/10/98 Atrazine 2.6 1113 N

06/18/98 Atrazine 16 7250 N

06/25/98 Atrazine 15 8764 N

07/01/98 Atrazine 5.2 10210 N

07/09/98 Atrazine 1.8 8672 N

07/16/98 Atrazine 1.0 9987 N

07/22/98 Atrazine 0.4 36960 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-28

Table IV-14 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/21/98 Metolachlor 0.2 9923 N 06/18/98 Metolachlor 13 7250 N

04/28/98 Metolachlor 0.3 2546 N 06/25/98 Metolachlor 6.8 8764 N

05/07/98 Metolachlor 0.7 3820 N 07/01/98 Metolachlor 5.7 10210 N

05/14/98 Metolachlor 1.0 3280 N 07/09/98 Metolachlor 3.6 8672 N

05/21/98 Metolachlor 1.3 1631 N 07/16/98 Metolachlor 1.1 9987 N

05/28/98 Metolachlor 1.9 1445 N 07/22/98 Metolachlor 1.2 36960 N

06/04/98 Metolachlor 2.0 1932 N 07/30/98 Metolachlor 1.0 10500 N

06/10/98 Metolachlor 1.0 1113 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-29

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-15 Station DC-5, Deer Creek near Delphi

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/22/98 Acetochlor 0.3 237 N 07/23/98 Atrazine 0.4 9994 N

04/29/98 Acetochlor 0.2 198 N 07/31/98 Atrazine 0.3 209 N

05/15/98 Acetochlor 0.1 260 N

05/22/98 Acetochlor 0.7 185 N 07/17/98 Benzo[a]anthracene 0.1 178 N

05/27/98 Acetochlor 0.6 151 N

06/03/98 Acetochlor 0.1 223 N 07/17/98 Benzo[a]pyrene 0.16 178 N

06/12/98 Acetochlor 2.3 2891 N

06/19/98 Acetochlor 0.8 1506 N 07/17/98 Benzo[b]fluoranthene 0.2 178 N

06/26/98 Acetochlor 0.1 249 N

07/02/98 Acetochlor 0.2 310 N 07/17/98 Benzo[k]fluoranthene 0.2 178 N

07/10/98 Acetochlor 0.1 822 N

07/23/98 Acetochlor 0.1 9994 N 05/27/98 Clomazone 0.4 151 N

06/03/98 Clomazone 0.1 223 N

05/27/98 Alachlor 0.1 151 N 06/12/98 Clomazone 3.2 2891 N

06/12/98 Alachlor 2.3 2891 N 06/19/98 Clomazone 0.7 1506 N

06/19/98 Alachlor 0.2 1506 N 06/26/98 Clomazone 0.3 249 N

07/02/98 Clomazone 0.3 310 N

04/22/98 Atrazine 0.3 237 N 07/10/98 Clomazone 0.2 822 N

04/29/98 Atrazine 0.3 198 N 07/23/98 Clomazone 0.2 9994 N

05/15/98 Atrazine 0.6 260 Y

05/15/98 Atrazine 0.8 260 N 06/26/98 Cyanazine 0.3 249 N

05/22/98 Atrazine 2.9 185 N

05/27/98 Atrazine 2.9 151 N 04/29/98 Di(2-ethylhexyl)phthalate 0.9 198 N

06/03/98 Atrazine 1.3 223 N

06/09/98 Atrazine 0.5 122 N 06/19/98 Fluoranthene 0.2 1506 N

06/12/98 Atrazine 16 2891 N 07/17/98 Fluoranthene 0.4 178 N

06/19/98 Atrazine 3.5 1506 N

06/26/98 Atrazine 2.0 249 N

07/02/98 Atrazine 0.9 310 N

07/10/98 Atrazine 0.7 822 N

07/17/98 Atrazine 0.4 178 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-30

Table IV-15 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/22/98 Metolachlor 0.2 237 N 06/12/98 Metolachlor 30 2891 N

04/29/98 Metolachlor 0.2 198 N 06/19/98 Metolachlor 6.4 1506 N

05/15/98 Metolachlor 0.4 260 Y 06/26/98 Metolachlor 2.2 249 N

05/15/98 Metolachlor 0.5 260 N 07/02/98 Metolachlor 2.2 310 N

05/22/98 Metolachlor 2.6 185 N 07/10/98 Metolachlor 2.3 822 N

05/27/98 Metolachlor 1.9 151 N 07/17/98 Metolachlor 0.6 178 N

06/03/98 Metolachlor 0.7 223 N 07/23/98 Metolachlor 1.5 9994 N

06/09/98 Metolachlor 0.3 122 N 07/31/98 Metolachlor 0.8 209 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-31

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-16 Station TR-159, Tippecanoe River at Oswego

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

06/18/98 Acetochlor 0.2 74 N 04/21/98 Di(2- 1.1 319 N

04/28/98 Di(2-ethylhexyl)phthalate 1.3 195 N

04/21/98 Atrazine 0.5 319 N

05/07/98 Atrazine 0.3 207 N 04/21/98 Di-n-butylphthalate 2.8 319 N

05/14/98 Atrazine 0.2 166 N

05/21/98 Atrazine 0.3 59 N 04/21/98 Metolachlor 0.2 319 N

05/28/98 Atrazine 0.6 70 N 04/28/98 Metolachlor 0.1 195 N

06/04/98 Atrazine 0.4 47 N 05/07/98 Metolachlor 0.1 207 N

06/10/98 Atrazine 0.6 25 N 05/14/98 Metolachlor 0.1 166 N

06/18/98 Atrazine 0.4 74 N 05/21/98 Metolachlor 0.2 59 N

06/25/98 Atrazine 0.4 81 N 05/28/98 Metolachlor 0.2 70 N

07/01/98 Atrazine 0.5 115 N 06/04/98 Metolachlor 0.2 47 N

07/09/98 Atrazine 0.5 135 N 06/10/98 Metolachlor 0.2 25 N

07/16/98 Atrazine 0.5 69 N 06/18/98 Metolachlor 0.5 74 N

07/22/98 Atrazine 0.5 79 N 06/25/98 Metolachlor 0.2 81 N

07/30/98 Atrazine 0.3 108 N 07/01/98 Metolachlor 0.3 115 N

07/09/98 Metolachlor 0.2 135 N

07/16/98 Metolachlor 0.2 69 N

07/22/98 Metolachlor 0.2 79 N

07/30/98 Metolachlor 0.1 108 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-32
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-33

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-17 Station TR-79, Tippecanoe River near Ora

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Acetochlor 0.2 2466 N 04/21/98 Di(2-ethylhexyl)phthalate 1.2 2366 N

05/21/98 Acetochlor 1.3 1183 N 07/09/98 Di(2-ethylhexyl)phthalate 0.7 2599 N

06/25/98 Acetochlor 0.2 1240 N

07/01/98 Acetochlor 0.1 1050 N 04/21/98 Di-n-butylphthalate 2.2 2366 N

07/09/98 Acetochlor 0.2 2599 N

07/16/98 Acetochlor 1.0 926 N 05/07/98 Metolachlor 0.4 2466 N

05/14/98 Metolachlor 0.2 1736 N

05/07/98 Alachlor 0.2 2466 N 05/21/98 Metolachlor 0.3 1183 N

05/21/98 Alachlor 0.7 1183 N 05/28/98 Metolachlor 0.2 886 N

06/25/98 Alachlor 0.1 1240 N 06/25/98 Metolachlor 0.4 1240 N

07/01/98 Alachlor 0.2 1050 N 07/01/98 Metolachlor 0.4 1050 N

07/09/98 Alachlor 0.2 2599 N 07/09/98 Metolachlor 0.8 2599 N

07/16/98 Metolachlor 2.9 926 N

05/07/98 Atrazine 0.6 2466 N 07/22/98 Metolachlor 0.1 944 N

05/21/98 Atrazine 1.8 1183 N 07/30/98 Metolachlor 0.2 1370 N

05/28/98 Atrazine 0.5 886 N

06/04/98 Atrazine 0.3 635 N

06/10/98 Atrazine 0.4 635 N

06/25/98 Atrazine 1.2 1240 N

07/01/98 Atrazine 0.8 1050 N

07/09/98 Atrazine 0.8 2599 N

07/16/98 Atrazine 1.8 926 N

07/22/98 Atrazine 0.3 944 N

07/30/98 Atrazine 0.4 1370 N

07/16/98 Clomazone 0.1 926 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-34
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-35

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-18 Station TR-9, Tippecanoe River near Delphi

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/15/98 Acetochlor 0.4 5023 N 07/10/98 Atrazine 1.1 4591 N

05/22/98 Acetochlor 0.2 900 N 07/17/98 Atrazine 0.7 1990 N

05/27/98 Acetochlor 0.7 1577 N 07/23/98 Atrazine 0.6 8698 N

06/03/98 Acetochlor 0.4 2559 N 07/31/98 Atrazine 0.4 1952 N

06/09/98 Acetochlor 0.2 1725 N

06/12/98 Acetochlor 0.6 8447 Y 06/12/98 Clomazone 0.5 8447 Y

06/19/98 Acetochlor 1.6 5544 N 06/19/98 Clomazone 0.3 5544 N

06/26/98 Acetochlor 0.6 2384 N 07/02/98 Clomazone 0.2 3490 N

07/02/98 Acetochlor 0.2 3490 N

07/10/98 Acetochlor 0.3 4591 N 06/26/98 Cyanazine 0.3 2384 N

07/31/98 Acetochlor 0.2 1952 N

04/22/98 Di(2-ethylhexyl)phthalate 0.8 4600 N

05/27/98 Alachlor 0.1 1577 N 04/29/98 Di(2-ethylhexyl)phthalate 1.3 1812 N

06/03/98 Alachlor 0.1 2559 N 05/04/98 Di(2-ethylhexyl)phthalate 2.5 5986 N

06/09/98 Alachlor 0.1 1725 N 06/12/98 Di(2-ethylhexyl)phthalate 0.8 8447 Y

06/12/98 Alachlor 0.2 8447 Y

06/19/98 Alachlor 0.5 5544 N 04/29/98 Di-n-butylphthalate 2.3 1812 N

06/26/98 Alachlor 0.3 2384 N 05/04/98 Di-n-butylphthalate 1.9 5986 N

07/10/98 Alachlor 0.1 4591 N 05/15/98 Di-n-butylphthalate 1.0 5023 N

04/22/98 Atrazine 0.2 4600 N 07/02/98 Fluoranthene 0.2 3490 N

05/04/98 Atrazine 0.6 5986 N

05/15/98 Atrazine 1.0 5023 N

05/22/98 Atrazine 0.4 900 N

05/27/98 Atrazine 2.8 1577 N

06/03/98 Atrazine 2.1 2559 N

06/09/98 Atrazine 1.6 1725 N

06/12/98 Atrazine 2.8 8447 Y

06/19/98 Atrazine 8.6 5544 N

06/26/98 Atrazine 5.0 2384 N

07/02/98 Atrazine 1.5 3490 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-36

Table IV-18 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/29/98 Metolachlor 0.1 1812 N 06/19/98 Metolachlor 4.4 5544 N

05/04/98 Metolachlor 1.1 5986 N 06/26/98 Metolachlor 1.6 2384 N

05/15/98 Metolachlor 0.7 5023 N 07/02/98 Metolachlor 1.3 3490 N

05/22/98 Metolachlor 0.2 900 N 07/10/98 Metolachlor 1.3 4591 N

05/27/98 Metolachlor 0.7 1577 N 07/17/98 Metolachlor 0.5 1990 N

06/03/98 Metolachlor 0.5 2559 N 07/23/98 Metolachlor 0.3 8698 N

06/09/98 Metolachlor 0.4 1725 N 07/31/98 Metolachlor 0.3 1952 N

06/12/98 Metolachlor 3.1 8447 Y
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-37

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-19 Station WC-80, Wildcat Creek near Jerome

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/30/98 Acetochlor 0.1 223 N 06/25/98 Atrazine 6.7 144 N

05/07/98 Acetochlor 0.4 1074 N 07/02/98 Atrazine 3.9 441 N

05/14/98 Acetochlor 1.0 250 N 07/10/98 Atrazine 2.2 1159 N

05/22/98 Acetochlor 0.4 159 N 07/16/98 Atrazine 1.6 181 N

05/28/98 Acetochlor 0.1 91 N 07/23/98 Atrazine 0.5 5854 N

06/04/98 Acetochlor 0.2 69 Y 07/31/98 Atrazine 0.7 179 N

06/04/98 Acetochlor 0.1 69 N

04/23/98 Chlorpyrifos 0.1 182 N

06/12/98 Acetochlor 2.4 6847 N

06/19/98 Acetochlor 1.1 1632 N 06/12/98 Clomazone 1.6 6847 N

06/25/98 Acetochlor 0.5 144 N 06/19/98 Clomazone 0.9 1632 N

07/02/98 Acetochlor 0.2 441 N 06/25/98 Clomazone 0.5 144 N

07/10/98 Acetochlor 0.2 1159 N 07/02/98 Clomazone 0.3 441 N

07/10/98 Clomazone 0.3 1159 N

06/12/98 Alachlor 0.4 6847 N 07/16/98 Clomazone 0.1 181 N

06/19/98 Alachlor 0.5 1632 N 07/23/98 Clomazone 0.1 5854 N

06/25/98 Alachlor 0.2 144 N

07/02/98 Alachlor 0.1 441 N 05/14/98 Cyanazine 0.7 250 N

07/10/98 Alachlor 0.1 1159 N 05/22/98 Cyanazine 0.4 159 N

06/04/98 Cyanazine 0.3 69 Y

04/23/98 Atrazine 0.2 182 N 06/10/98 Cyanazine 0.3 56 N

04/30/98 Atrazine 0.2 223 N 06/12/98 Cyanazine 3.4 6847 N

05/07/98 Atrazine 0.9 1074 N 06/19/98 Cyanazine 0.6 1632 N

05/14/98 Atrazine 2.6 250 N 06/25/98 Cyanazine 0.6 144 N

05/22/98 Atrazine 1.5 159 N

05/28/98 Atrazine 1.1 91 N 04/23/98 Di(2-ethylhexyl)phthalate 1.6 182 N

06/04/98 Atrazine 1.2 69 Y

06/04/98 Atrazine 1.2 69 N 05/07/98 Di-n-butylphthalate 1.1 1074 N

06/10/98 Atrazine 1.0 56 N

06/12/98 Atrazine 19 6847 N

06/19/98 Atrazine 8.0 1632 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-38

Table IV-19 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Fluoranthene 0.7 1074 N 06/10/98 Metolachlor 0.3 56 N

05/22/98 Fluoranthene 0.4 159 N 06/12/98 Metolachlor 16 6847 N

05/28/98 Fluoranthene 0.2 91 N 06/19/98 Metolachlor 5.5 1632 N

06/04/98 Fluoranthene 0.1 69 Y 06/25/98 Metolachlor 3.5 144 N

06/04/98 Fluoranthene 0.1 69 N 07/02/98 Metolachlor 2.4 441 N

06/10/98 Fluoranthene 0.1 56 N 07/10/98 Metolachlor 2.2 1159 N

07/31/98 Fluoranthene 0.2 179 N 07/16/98 Metolachlor 1.1 181 N

07/23/98 Metolachlor 0.9 5854 N

04/23/98 Metolachlor 0.3 182 N 07/31/98 Metolachlor 0.8 179 N

04/30/98 Metolachlor 0.3 223 N

05/07/98 Metolachlor 1.1 1074 N 04/30/98 Prometon 0.2 223 N

05/14/98 Metolachlor 1.6 250 N 06/04/98 Prometon 0.2 69 N

05/22/98 Metolachlor 0.7 159 N 06/10/98 Prometon 0.3 56 N

05/28/98 Metolachlor 0.5 91 N

06/04/98 Metolachlor 0.3 69 Y 05/28/98 Pyrene 0.2 91 N

06/04/98 Metolachlor 0.3 69 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-39

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-20 Station WC-60, Wildcat Creek at Kokomo

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/30/98 Acetochlor 0.1 223 N 06/25/98 Atrazine 6.7 144 N

05/07/98 Acetochlor 0.4 1074 N 07/02/98 Atrazine 3.9 441 N

05/14/98 Acetochlor 1.0 250 N 07/10/98 Atrazine 2.2 1159 N

05/22/98 Acetochlor 0.4 159 N 07/16/98 Atrazine 1.6 181 N

05/28/98 Acetochlor 0.1 91 N 07/23/98 Atrazine 0.5 5854 N

06/04/98 Acetochlor 0.2 69 Y 07/31/98 Atrazine 0.7 179 N

06/04/98 Acetochlor 0.1 69 N

06/10/98 Acetochlor 0.2 56 N 04/23/98 Chlorpyrifos 0.1 182 N

06/12/98 Acetochlor 2.4 6847 N

06/19/98 Acetochlor 1.1 1632 N 06/12/98 Clomazone 1.6 6847 N

06/25/98 Acetochlor 0.5 144 N 06/19/98 Clomazone 0.9 1632 N

07/02/98 Acetochlor 0.2 441 N 06/25/98 Clomazone 0.5 144 N

07/10/98 Acetochlor 0.2 1159 N 07/02/98 Clomazone 0.3 441 N

07/10/98 Clomazone 0.3 1159 N

06/12/98 Alachlor 0.4 6847 N 07/16/98 Clomazone 0.1 181 N

06/19/98 Alachlor 0.5 1632 N 07/23/98 Clomazone 0.1 5854 N

06/25/98 Alachlor 0.2 144 N

07/02/98 Alachlor 0.1 441 N 05/14/98 Cyanazine 0.7 250 N

07/10/98 Alachlor 0.1 1159 N 05/22/98 Cyanazine 0.4 159 N

06/04/98 Cyanazine 0.3 69 Y

04/23/98 Atrazine 0.2 182 N 06/10/98 Cyanazine 0.3 56 N

04/30/98 Atrazine 0.2 223 N 06/12/98 Cyanazine 3.4 6847 N

05/07/98 Atrazine 0.9 1074 N 06/19/98 Cyanazine 0.6 1632 N

05/14/98 Atrazine 2.6 250 N 06/25/98 Cyanazine 0.6 144 N

05/22/98 Atrazine 1.5 159 N

05/28/98 Atrazine 1.1 91 N 04/23/98 Di(2-ethylhexyl)phthalate 1.6 182 N

06/04/98 Atrazine 1.2 69 Y

06/04/98 Atrazine 1.2 69 N 05/07/98 Di-n-butylphthalate 1.1 1074 N

06/10/98 Atrazine 1.0 56 N

06/12/98 Atrazine 19 6847 N

06/19/98 Atrazine 8.0 1632 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-40

Table IV-20 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/07/98 Fluoranthene 0.7 1074 N 06/10/98 Metolachlor 0.3 56 N

05/22/98 Fluoranthene 0.4 159 N 06/12/98 Metolachlor 16 6847 N

05/28/98 Fluoranthene 0.2 91 N 06/19/98 Metolachlor 5.5 1632 N

06/04/98 Fluoranthene 0.1 69 Y 06/25/98 Metolachlor 3.5 144 N

06/04/98 Fluoranthene 0.1 69 N 07/02/98 Metolachlor 2.4 441 N

06/10/98 Fluoranthene 0.1 56 N 07/10/98 Metolachlor 2.2 1159 N

07/31/98 Fluoranthene 0.2 179 N 07/16/98 Metolachlor 1.1 181 N

07/23/98 Metolachlor 0.9 5854 N

04/23/98 Metolachlor 0.3 182 N 07/31/98 Metolachlor 0.8 179 N

04/30/98 Metolachlor 0.3 223 N

05/07/98 Metolachlor 1.1 1074 N 04/30/98 Prometon 0.2 223 N

05/14/98 Metolachlor 1.6 250 N 06/04/98 Prometon 0.2 69 N

05/22/98 Metolachlor 0.7 159 N 06/10/98 Prometon 0.3 56 N

05/28/98 Metolachlor 0.5 91 N

06/04/98 Metolachlor 0.3 69 Y 05/28/98 Pyrene 0.2 91 N

06/04/98 Metolachlor 0.3 69 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-41

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-21 Station WC-15, Wildcat Creek at Owasco

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

07/10/98 Acetochlor 0.1 2199 N 07/17/98 Clomazone 0.1 259 N

06/03/98 Acetochlor 0.1 166 N 07/10/98 Clomazone 0.2 2199 N

07/17/98 Acetochlor 0.2 259 N 07/02/98 Clomazone 0.4 628 N

05/04/98 Acetochlor 0.2 1010 N 06/19/98 Clomazone 0.8 1878 N

05/22/98 Acetochlor 0.3 226 N 06/12/98 Clomazone 1.7 4172 N

05/27/98 Acetochlor 0.3 242 N

07/02/98 Acetochlor 0.4 628 N 06/03/98 Cyanazine 0.2 166 N

05/15/98 Acetochlor 0.6 375 N 06/09/98 Cyanazine 0.2 142 N

06/19/98 Acetochlor 1.3 1878 N 06/19/98 Cyanazine 0.5 1878 N

06/12/98 Acetochlor 3.7 4172 N 05/15/98 Cyanazine 0.6 375 N

07/02/98 Alachlor 0.2 628 N 04/29/98 Di(2-ethylhexyl)phthalate 0.6 259 N

06/19/98 Alachlor 0.5 1878 N 07/17/98 Di(2-ethylhexyl)phthalate 0.6 259 N

06/12/98 Alachlor 1.2 4172 N

04/22/98 Di-n-butylphthalate 1.3 3623 N

04/22/98 Atrazine 0.2 3623 N

04/29/98 Atrazine 0.2 259 N

07/31/98 Atrazine 0.4 329 N

05/04/98 Atrazine 0.4 1010 N

07/23/98 Atrazine 0.7 3219 Y

06/09/98 Atrazine 0.7 142 N

07/23/98 Atrazine 0.7 3219 N

06/03/98 Atrazine 0.9 166 N

07/17/98 Atrazine 1.1 259 N

07/10/98 Atrazine 1.3 2199 N

05/22/98 Atrazine 1.4 226 N

05/27/98 Atrazine 1.8 242 N

06/12/98 Atrazine 14 4172 N

05/15/98 Atrazine 2.0 375 N

07/02/98 Atrazine 5.3 628 N

06/19/98 Atrazine 9.0 1878 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-42

TableIV-21 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/29/98 Metolachlor 0.2 259 N 05/22/98 Metolachlor 0.7 226 N

06/09/98 Metolachlor 0.2 142 N 07/23/98 Metolachlor 0.8 3219 Y

04/22/98 Metolachlor 0.2 3623 N 07/17/98 Metolachlor 1.0 259 N

06/03/98 Metolachlor 0.3 166 N 05/15/98 Metolachlor 1.3 375 N

07/31/98 Metolachlor 0.5 329 N 07/10/98 Metolachlor 1.5 2199 N

05/04/98 Metolachlor 0.6 1010 N 06/12/98 Metolachlor 11 4172 N

05/27/98 Metolachlor 0.7 242 N 07/02/98 Metolachlor 3.2 628 N

07/23/98 Metolachlor 0.7 3219 N 06/19/98 Metolachlor 5.6 1878 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-43

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-22 Station WCS-4, South Fork Wildcat Creek near Lafayette

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/15/98 Acetochlor 0.3 270 N 06/26/98 Clomazone 0.3 36 N

05/22/98 Acetochlor 1.7 22 N 07/02/98 Clomazone 0.3 368 N

05/27/98 Acetochlor 1.1 368 N 07/10/98 Clomazone 0.2 459 N

06/03/98 Acetochlor 0.2 168 N 07/23/98 Clomazone 0.2 1627 N

06/12/98 Acetochlor 3.7 10140 N

06/19/98 Acetochlor 0.9 1689 N 04/22/98 Di(2-ethylhexyl)phthalate 0.6 22 N

06/26/98 Acetochlor 0.3 36 N 05/15/98 Di(2-ethylhexyl)phthalate 0.7 270 N

07/02/98 Acetochlor 0.3 368 N 06/12/98 Di(2-ethylhexyl)phthalate 1.8 10140 N

07/10/98 Acetochlor 0.2 459 N

04/22/98 Di-n-butylphthalate 1.7 22 N

06/12/98 Alachlor 0.1 10140 N 04/29/98 Di-n-butylphthalate 1.7 162 N

06/19/98 Alachlor 0.1 1689 N 06/12/98 Di-n-butylphthalate 1.7 10140 N

04/29/98 Atrazine 0.3 162 N 04/22/98 Metolachlor 0.1 22 N

05/15/98 Atrazine 1.4 270 N 04/29/98 Metolachlor 0.5 162 N

05/22/98 Atrazine 5.5 22 N 05/15/98 Metolachlor 0.9 270 N

05/27/98 Atrazine 4.1 368 N 05/22/98 Metolachlor 6.7 22 N

06/03/98 Atrazine 1.7 168 N 05/27/98 Metolachlor 3.0 368 N

06/09/98 Atrazine 0.6 174 N 06/03/98 Metolachlor 0.6 168 N

06/12/98 Atrazine 15 10140 N 06/09/98 Metolachlor 0.3 174 N

06/19/98 Atrazine 5.0 1689 N 06/12/98 Metolachlor 15 10140 N

06/26/98 Atrazine 2.6 36 N 06/19/98 Metolachlor 3.9 1689 N

07/02/98 Atrazine 1.5 368 N 06/26/98 Metolachlor 1.9 36 N

07/10/98 Atrazine 0.9 459 N 07/02/98 Metolachlor 1.4 368 N

07/17/98 Atrazine 0.4 142 N 07/10/98 Metolachlor 1.0 459 N

07/23/98 Atrazine 0.7 1627 N 07/17/98 Metolachlor 0.4 142 N

07/23/98 Metolachlor 1.1 1627 N

05/22/98 Clomazone 0.5 22 N 07/31/98 Metolachlor 0.3 126 N

05/27/98 Clomazone 0.3 368 N

06/12/98 Clomazone 2.6 10140 N 06/12/98 Pendimethalin 0.2 10140 N

06/19/98 Clomazone 0.7 1989 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-44
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-45

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-23 Station WC-5, Wildcat Creek near Lafayette

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/29/98 Acetochlor 0.2 581 N 06/19/98 Atrazine 7.6 4902 N

05/15/98 Acetochlor 0.6 1000 N 06/26/98 Atrazine 4.2 1264 N

05/22/98 Acetochlor 1.2 506 N 06/26/98 Atrazine 3.9 1264 Y

05/27/98 Acetochlor 1.3 952 N 07/02/98 Atrazine 2.7 1421 N

06/03/98 Acetochlor 0.1 516 N 07/10/98 Atrazine 1.2 4344 N

06/12/98 Acetochlor 5.0 16750 N 07/17/98 Atrazine 0.7 642 N

06/19/98 Acetochlor 1.4 4902 Y 07/23/98 Atrazine 0.8 5701 N

06/19/98 Acetochlor 1.4 4902 N

06/26/98 Acetochlor 0.4 1264 Y 05/22/98 Clomazone 0.2 506 N

06/26/98 Acetochlor 0.4 1264 N 05/27/98 Clomazone 0.3 952 N

07/02/98 Acetochlor 1.2 1421 N 06/12/98 Clomazone 2.8 16750 N

07/10/98 Acetochlor 0.1 4344 N 06/19/98 Clomazone 0.8 4902 Y

07/23/98 Acetochlor 0.2 5701 N 06/19/98 Clomazone 0.9 4902 N

06/26/98 Clomazone 0.4 1264 N

05/27/98 Alachlor 0.1 952 N 06/26/98 Clomazone 0.4 1264 Y

06/12/98 Alachlor 0.5 16750 N 07/02/98 Clomazone 0.2 1421 N

06/19/98 Alachlor 0.2 4902 N 07/10/98 Clomazone 0.2 4344 N

06/19/98 Alachlor 0.3 4902 Y 07/23/98 Clomazone 0.2 5701 N

06/26/98 Alachlor 0.1 1264 N

06/26/98 Alachlor 0.1 1264 Y 06/26/98 Cyanazine 0.3 1264 N

07/02/98 Alachlor 0.1 1421 N

06/12/98 Di(2-ethylhexyl)phthalate 1.5 16750 N

04/22/98 Atrazine 0.1 852 N 06/26/98 Di(2-ethylhexyl)phthalate 0.8 1264 Y

04/29/98 Atrazine 0.2 581 N 06/26/98 Di(2-ethylhexyl)phthalate 0.6 1264 N

05/15/98 Atrazine 1.7 1000 N

05/22/98 Atrazine 2.7 506 N 06/09/98 Di-n-butylphthalate 1.0 464 N

05/27/98 Atrazine 4.4 952 N 07/23/98 Di-n-butylphthalate 1.0 5701 N

06/03/98 Atrazine 1.2 516 N

06/09/98 Atrazine 0.7 464 N 06/19/98 Fluoranthene 0.2 4902 Y

06/12/98 Atrazine 15 16750 N 06/26/98 Fluoranthene 0.1 1264 N

06/19/98 Atrazine 6.6 4902 Y
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-46

Table IV-23 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/22/98 Metolachlor 0.1 852 N 06/26/98 Metolachlor 2.6 1264 Y

04/29/98 Metolachlor 0.2 581 N 07/02/98 Metolachlor 2.9 1421 N

05/15/98 Metolachlor 1.1 1000 N 07/10/98 Metolachlor 1.3 4344 N

05/22/98 Metolachlor 2.1 506 N 07/17/98 Metolachlor 0.8 642 N

05/27/98 Metolachlor 2.9 952 N 07/23/98 Metolachlor 1.1 5701 N

06/03/98 Metolachlor 0.5 516 N 07/31/98 Metolachlor 0.5 540 N

06/09/98 Metolachlor 0.3 464 N

06/12/98 Metolachlor 14 16750 N 06/12/98 Pendimethalin 0.1 16750 N

06/19/98 Metolachlor 6.0 4902 N

06/19/98 Metolachlor 5.9 4902 Y 07/23/98 Prometryn 0.2 5701 N

06/26/98 Metolachlor 2.6 1264 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-47

Appendix IV Herbicide Concentrations and Stream Flow

Table IV-24 Station WB-311, Wabash River at Lafayette

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

05/04/98 Acetochlor 0.8 13770 N 05/27/98 Atrazine 2.5 440 N

05/15/98 Acetochlor 0.4 5190 N 06/03/98 Atrazine 3.8 4140 N

05/22/98 Acetochlor 0.7 4224 N 06/09/98 Atrazine 1.3 3148 N

05/27/98 Acetochlor 0.6 440 N 06/12/98 Atrazine 12 32570 N

06/03/98 Acetochlor 0.6 4140 N 06/19/98 Atrazine 9.7 21940 N

06/09/98 Acetochlor 0.2 3148 N 06/26/98 Atrazine 10 13170 N

06/12/98 Acetochlor 3.2 32570 N 07/02/98 Atrazine 1.9 15410 N

06/19/98 Acetochlor 2.3 21940 N 07/10/98 Atrazine 1.4 20540 Y

06/26/98 Acetochlor 1.6 13170 N 07/10/98 Atrazine 1.5 20540 N

07/02/98 Acetochlor 0.3 15410 N 07/17/98 Atrazine 1.3 12120 N

07/10/98 Acetochlor 0.6 20540 Y 07/17/98 Atrazine 1.3 12120 Y

07/10/98 Acetochlor 0.6 20540 N 07/23/98 Atrazine 0.7 40710 N

07/17/98 Acetochlor 0.5 12120 N 07/31/98 Atrazine 0.3 13560 N

07/17/98 Acetochlor 0.6 12120 Y

07/23/98 Acetochlor 0.1 40710 N 05/22/98 Carboxin 0.2 4224 N

07/31/98 Acetochlor 0.2 13560 N

06/12/98 Clomazone 1.6 32570 N

05/27/98 Alachlor 0.1 440 N 06/19/98 Clomazone 0.4 21940 N

06/03/98 Alachlor 0.2 4140 N 07/02/98 Clomazone 0.3 15410 N

06/12/98 Alachlor 0.6 32570 N 07/10/98 Clomazone 0.1 20540 Y

06/19/98 Alachlor 0.3 21940 N 07/17/98 Clomazone 0.1 12120 N

06/26/98 Alachlor 0.2 13170 N

07/02/98 Alachlor 0.2 15410 N 06/12/98 Cyanazine 0.4 32570 N

07/10/98 Alachlor 0.1 20540 N 06/26/98 Cyanazine 0.9 13170 N

07/10/98 Alachlor 0.1 20540 Y

04/29/98 Di(2-ethylhexyl)phthalate 1.0 5586 N

04/22/98 Atrazine 0.2 15520 N 06/12/98 Di(2-ethylhexyl)phthalate 0.9 32570 N

04/29/98 Atrazine 0.2 5586 N 06/26/98 Di(2-ethylhexyl)phthalate 0.6 13170 N

05/04/98 Atrazine 2.1 13770 N

05/15/98 Atrazine 0.7 5190 N 04/29/98 Di-n-butylphthalate 2.5 5586 N

05/22/98 Atrazine 1.0 4224 N
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV-48

Table IV-24 Continued

RESULT FLOW DUPLICATE RESULT FLOW DUPLICATE

DATE COMPOUND (ug/L) (cfs) (Y/N) DATE COMPOUND (ug/L) (cfs) (Y/N)

04/22/98 Fluoranthene 0.3 15520 N 06/19/98 Metolachlor 6.2 21940 N

06/26/98 Metolachlor 4.6 13170 N

04/22/98 Metolachlor 0.2 15520 N 07/02/98 Metolachlor 2.0 15410 N

04/29/98 Metolachlor 0.2 5586 N 07/10/98 Metolachlor 2.1 20540 N

05/04/98 Metolachlor 1.7 13770 N 07/10/98 Metolachlor 2.0 20540 Y

05/15/98 Metolachlor 0.5 5190 N 07/17/98 Metolachlor 1.8 12120 N

05/22/98 Metolachlor 0.7 4224 N 07/17/98 Metolachlor 1.8 12120 Y

05/27/98 Metolachlor 1.0 440 N 07/23/98 Metolachlor 0.9 40710 N

06/03/98 Metolachlor 1.0 4140 N 07/31/98 Metolachlor 0.8 13560 N

06/09/98 Metolachlor 0.4 3148 N 07/31/98 Metolachlor 0.3 13560 Y

06/12/98 Metolachlor 14 32570 N
APPENDIX V

Descriptive Statistics
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-ii

Appendix V

List of Tables

TABLE V-1 STATION WB, WABASH RIVER AT LINN GROVE.......................................................................................... 1

TABLE V-2 STATION WB-409, WABASH RIVER AT HUNTINGTON ................................................................................. 2

TABLE V-3 STATION LR-8, LITTLE RIVER NEAR HUNTINGTON...................................................................................... 3

TABLE V-4 STATION S-30, SALAMONIE RIVER NEAR WARREN...................................................................................... 4

TABLE V-5 STATION S-3, SALAMONIE RIVER AT DORA ................................................................................................. 5

TABLE V-6 STATION WB-387, WABASH RIVER AT WABASH ........................................................................................ 6

TABLE V-7 STATION MS-100, MISSISSINEWA RIVER NEAR RIDGEVILLE........................................................................ 7

TABLE V-8 STATION MS-8, MISSISSINEWA RIVER AT MARION ..................................................................................... 8

TABLE V-9 STATION MS-7, MISSISSINEWA RIVER AT PEORIA ....................................................................................... 9

TABLE V-10 STATION WB-370, WABASH RIVER AT PERU .......................................................................................... 10

TABLE V-11 STATION PIP-11, PIPE CREEK NEAR BUNKER HILL.................................................................................. 11

TABLE V-12 STATION ELL-53, EEL RIVER AT NORTH MANCHESTER.......................................................................... 12

TABLE V-13 STATION ELL-7, EEL RIVER NEAR LOGANSPORT .................................................................................... 13

TABLE V-14 STATION WB-354, WABASH RIVER AT LOGANSPORT ............................................................................. 14

TABLE V-15 STATION DC-5, DEER CREEK NEAR DELPHI ............................................................................................ 15

TABLE V-16 STATION TR-159, TIPPECANOE RIVER AT OSWEGO................................................................................. 16

TABLE V-17 STATION TR-79, TIPPECANOE RIVER NEAR ORA ..................................................................................... 17

TABLE V-18 STATION TR-9, TIPPECANOE RIVER NEAR DELPHI................................................................................... 18

TABLE V-19 STATION WC-80, WILDCAT CREEK NEAR JEROME .................................................................................. 19

TABLE V-20 STATION WC-60, WILDCAT CREEK AT KOKOMO .................................................................................... 20

TABLE V-21 STATION WC-15, WILDCAT CREEK AT OWASCO..................................................................................... 21

TABLE V-22 STATION WCS-.4, SOUTH FORK WILDCAT CREEK NEAR LAFAYETTE...................................................... 22

TABLE V-23 STATION WC-5, WILDCAT CREEK NEAR LAFAYETTE .............................................................................. 23

TABLE V-24 STATION WB-311 WABASH RIVER AT LAFAYETTE ................................................................................. 24
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-1

Appendix V Descriptive Statistics

Table V-1 Station WB, Wabash River at Linn Grove

Confid. Confid. Lower Upper

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Quartile Range Variance Std.Dev.

April-July

ACETOCHLOR 15 0.687 0.217 1.157 0.300 0.000 2.400 0.000 1.400 2.400 1.400 0.720 0.848

ATRAZINE 15 3.560 1.660 5.460 2.100 0.500 10.000 0.700 6.700 9.500 6.000 11.771 3.431

METOLACHLOR 15 2.573 1.471 3.675 2.000 0.400 7.700 1.000 2.900 7.300 1.900 3.959 1.990

April

ACETOCHLOR 2 0.250 -2.927 3.427 0.250 0.000 0.500 n/a n/a 0.500 n/a 0.125 0.354

ATRAZINE 2 1.100 -6.524 8.724 1.100 0.500 1.700 n/a n/a 1.200 n/a 0.720 0.849

METOLACHLOR 2 2.300 -4.053 8.653 2.300 1.800 2.800 n/a n/a 1.000 n/a 0.500 0.707

May

ACETOCHLOR 4 0.650 -0.678 1.978 0.250 0.200 1.900 0.200 1.100 1.700 0.900 0.697 0.835

ATRAZINE 4 2.500 -3.230 8.230 0.750 0.600 7.900 0.650 4.350 7.300 3.700 12.967 3.601

METOLACHLOR 4 1.825 -0.393 4.043 1.800 0.400 3.300 0.650 3.000 2.900 2.350 1.943 1.394

June

ACETOCHLOR 5 1.400 0.276 2.524 1.400 0.400 2.400 0.600 2.200 2.000 1.600 0.820 0.906

ATRAZINE 5 6.860 3.000 10.720 6.700 3.500 10.000 4.100 10.000 6.500 5.900 9.663 3.109

METOLACHLOR 5 4.120 0.856 7.384 2.900 1.900 7.700 2.000 6.100 5.800 4.100 6.912 2.629

July

ACETOCHLOR 4 0.050 -0.109 0.209 0.000 0.000 0.200 0.000 0.100 0.200 0.100 0.010 0.100

ATRAZINE 4 1.725 0.423 3.027 1.900 0.600 2.500 1.150 2.300 1.900 1.150 0.669 0.818

METOLACHLOR 4 1.525 0.013 3.037 1.200 0.800 2.900 0.900 2.150 2.100 1.250 0.903 0.950
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-2

Appendix V Descriptive Statistics

Table V-2 Station WB-409, Wabash River at Huntington

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 15 1.193 0.368 2.019 1.000 0.000 5.800 0.200 1.900 5.800 1.700 2.221 1.490

ATRAZINE 15 4.540 1.388 7.692 2.900 0.200 21.000 0.800 5.700 20.800 4.900 32.405 5.693

METOLACHLOR 15 2.840 1.309 4.371 2.100 0.300 11.000 1.100 3.300 10.700 2.200 7.638 2.764

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.250 -0.385 0.885 0.250 0.200 0.300 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.300 n/a n/a 0.300 0.300 0.300 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 1.350 0.156 2.544 1.500 0.400 2.000 0.750 1.950 1.600 1.200 0.563 0.751

ATRAZINE 4 2.750 -0.747 6.247 2.350 0.600 5.700 1.150 4.350 5.100 3.200 4.830 2.198

METOLACHLOR 4 2.275 0.418 4.132 2.550 0.700 3.300 1.400 3.150 2.600 1.750 1.363 1.167

June

ACETOCHLOR 5 2.280 -0.288 4.848 1.100 1.000 5.800 1.000 2.500 4.800 1.500 4.277 2.068

ATRAZINE 5 10.060 1.292 18.828 7.500 3.900 21.000 4.900 13.000 17.100 8.100 49.863 7.061

METOLACHLOR 5 5.120 0.432 9.808 3.600 2.100 11.000 2.200 6.700 8.900 4.500 14.257 3.776

July

ACETOCHLOR 4 0.275 0.036 0.514 0.200 0.200 0.500 0.200 0.350 0.300 0.150 0.022 0.150

ATRAZINE 4 1.575 0.097 3.053 1.300 0.800 2.900 0.950 2.200 2.100 1.250 0.862 0.929

METOLACHLOR 4 1.825 0.690 2.960 1.700 1.100 2.800 1.350 2.300 1.700 0.950 0.509 0.714
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-3

Appendix V Descriptive Statistics

Table V-3 Station LR-8, Little River near Huntington

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 13 0.262 -0.078 0.601 0.100 0.000 2.100 0.000 0.200 2.100 0.200 0.316 0.562

ATRAZINE 13 1.162 -0.087 2.410 0.500 0.000 7.900 0.500 0.700 7.900 0.200 4.271 2.067

METOLACHLOR 13 0.862 0.064 1.659 0.400 0.100 5.100 0.300 0.600 5.000 0.300 1.741 1.319

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.050 -0.585 0.685 0.050 0.000 0.100 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.150 -0.485 0.785 0.150 0.100 0.200 n/a n/a 0.100 n/a 0.005 0.071

May

ACETOCHLOR 3 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 3 0.567 0.280 0.854 0.500 0.500 0.700 n/a n/a 0.200 n/a 0.013 0.115

METOLACHLOR 3 0.467 0.180 0.754 0.400 0.400 0.600 n/a n/a 0.200 n/a 0.013 0.115

June

ACETOCHLOR 4 0.625 -0.952 2.202 0.200 0.000 2.100 0.050 1.200 2.100 1.150 0.983 0.991

ATRAZINE 4 2.625 -3.031 8.281 1.050 0.500 7.900 0.500 4.750 7.400 4.250 12.636 3.555

METOLACHLOR 4 1.675 -2.014 5.364 0.700 0.200 5.100 0.250 3.100 4.900 2.850 5.376 2.319

July

ACETOCHLOR 4 0.075 -0.077 0.227 0.050 0.000 0.200 0.000 0.150 0.200 0.150 0.009 0.096

ATRAZINE 4 0.700 0.149 1.251 0.600 0.400 1.200 0.500 0.900 0.800 0.400 0.120 0.346

METOLACHLOR 4 0.700 0.050 1.350 0.550 0.400 1.300 0.450 0.950 0.900 0.500 0.167 0.408
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-4

Appendix V Descriptive Statistics

Table V-4 Station S-30, Salamonie River near Warren

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 15 1.253 0.407 2.100 0.600 0.000 5.100 0.100 2.000 5.100 1.900 2.336 1.528

ATRAZINE 15 5.020 1.858 8.182 2.700 0.000 17.000 0.700 7.500 17.000 6.800 32.593 5.709

METOLACHLOR 15 1.673 0.861 2.485 1.300 0.100 4.500 0.400 2.600 4.400 2.200 2.149 1.466

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 1.700 -18.630 22.030 1.700 0.100 3.300 n/a n/a 3.200 n/a 5.120 2.263

May

ACETOCHLOR 4 0.800 -0.499 2.099 0.500 0.200 2.000 0.300 1.300 1.800 1.000 0.667 0.816

ATRAZINE 4 2.525 -2.661 7.711 1.050 0.600 7.400 0.750 4.300 6.800 3.550 10.623 3.259

METOLACHLOR 4 0.825 -0.088 1.738 0.750 0.300 1.500 0.350 1.300 1.200 0.950 0.329 0.574

June

ACETOCHLOR 5 2.780 0.679 4.881 2.600 0.600 5.100 2.000 3.600 4.500 1.600 2.862 1.692

ATRAZINE 5 11.280 4.673 17.887 8.900 6.000 17.000 7.500 17.000 11.000 9.500 28.317 5.321

METOLACHLOR 5 3.040 1.281 4.799 2.600 1.300 4.500 2.300 4.500 3.200 2.200 2.008 1.417

July

ACETOCHLOR 4 0.425 -0.440 1.290 0.250 0.000 1.200 0.050 0.800 1.200 0.750 0.296 0.544

ATRAZINE 4 2.200 -0.418 4.818 1.900 0.700 4.300 0.900 3.500 3.600 2.600 2.707 1.645

METOLACHLOR 4 0.800 0.042 1.558 0.800 0.300 1.300 0.400 1.200 1.000 0.800 0.227 0.476
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-5

Appendix V Descriptive Statistics

Table V-5 Station S-3, Salamonie River at Dora

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 1.587 0.942 2.231 1.600 0.000 4.400 0.700 2.100 4.400 1.400 1.354 1.164

ATRAZINE 15 2.900 1.517 4.283 2.100 0.000 9.100 1.200 4.900 9.100 3.700 6.233 2.497

METOLACHLOR 15 1.880 1.106 2.654 1.900 0.200 5.800 0.800 2.600 5.600 1.800 1.952 1.397

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.100 -1.171 1.371 0.100 0.000 0.200 n/a n/a 0.200 n/a 0.020 0.141

METOLACHLOR 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 1.250 0.056 2.444 1.250 0.400 2.100 0.650 1.850 1.700 1.200 0.563 0.751

ATRAZINE 4 2.125 -0.657 4.907 1.750 0.500 4.500 0.850 3.400 4.000 2.550 3.056 1.748

METOLACHLOR 4 1.050 -0.025 2.125 1.000 0.300 1.900 0.550 1.550 1.600 1.000 0.457 0.676

June

ACETOCHLOR 5 2.740 1.547 3.933 2.400 2.100 4.400 2.100 2.700 2.300 0.600 0.923 0.961

ATRAZINE 5 5.520 2.700 8.340 5.400 2.800 9.100 4.900 5.400 6.300 0.500 5.157 2.271

METOLACHLOR 5 2.900 0.833 4.967 2.100 1.800 5.800 2.000 2.800 4.000 0.800 2.770 1.664

July

ACETOCHLOR 4 1.275 0.335 2.215 1.200 0.700 2.000 0.800 1.750 1.300 0.950 0.349 0.591

ATRAZINE 4 1.800 1.389 2.211 1.800 1.500 2.100 1.600 2.000 0.600 0.400 0.067 0.258

METOLACHLOR 4 2.275 1.536 3.014 2.350 1.700 2.700 1.900 2.650 1.000 0.750 0.216 0.465
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-6

Appendix V Descriptive Statistics

Table V-6 Station WB-387, Wabash River at Wabash

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 1.427 0.594 2.259 1.100 0.000 5.200 0.200 2.400 5.200 2.200 2.259 1.503

ATRAZINE 15 3.553 0.949 6.157 2.700 0.100 18.000 0.700 3.600 17.900 2.900 22.110 4.702

METOLACHLOR 15 2.460 0.991 3.929 1.500 0.200 10.000 0.600 4.100 9.800 3.500 7.040 2.653

April

ACETOCHLOR 2 0.000 0.000 0.000 0.000 0.000 0.000 0.000

ATRAZINE 2 0.150 -0.485 0.785 0.150 0.100 0.200 0.100 0.005 0.071

METOLACHLOR 2 0.200 0.200 0.200 0.200 0.000 0.000 0.000

May

ACETOCHLOR 4 0.925 -0.364 2.214 0.700 0.300 2.000 0.300 1.550 1.700 1.250 0.656 0.810

ATRAZINE 4 1.800 -0.339 3.939 1.700 0.600 3.200 0.650 2.950 2.600 2.300 1.807 1.344

METOLACHLOR 4 1.125 0.035 2.215 1.050 0.500 1.900 0.550 1.700 1.400 1.150 0.469 0.685

June

ACETOCHLOR 4 2.475 -0.641 5.591 1.850 1.000 5.200 1.050 3.900 4.200 2.850 3.836 1.959

ATRAZINE 4 8.875 -1.882 19.632 6.950 3.600 18.000 3.750 14.000 14.400 10.250 45.703 6.760

METOLACHLOR 4 4.325 -1.982 10.632 2.900 1.500 10.000 1.600 7.050 8.500 5.450 15.709 3.963

July

ACETOCHLOR 5 1.560 -0.260 3.380 1.400 0.200 3.600 0.200 2.400 3.400 2.200 2.148 1.466

ATRAZINE 5 2.060 0.404 3.716 2.000 0.700 3.600 0.800 3.200 2.900 2.400 1.778 1.333

METOLACHLOR 5 2.940 0.335 5.545 2.700 0.700 5.600 1.200 4.500 4.900 3.300 4.403 2.098
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-7

Appendix V Descriptive Statistics

Table V-7 Station MS-100, Mississinewa River near Ridgeville

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 14 1.629 -0.610 3.867 0.200 0.000 14.000 0.000 0.800 14.000 0.800 15.036 3.878

ATRAZINE 14 6.786 -0.028 13.599 1.500 0.100 36.000 0.500 6.800 35.900 6.300 139.258 11.801

METOLACHLOR 14 7.557 -0.294 15.409 1.150 0.200 41.000 0.500 6.400 40.800 5.900 184.921 13.599

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.250 -0.385 0.885 0.250 0.200 0.300 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.300 -0.971 1.571 0.300 0.200 0.400 n/a n/a 0.200 n/a 0.020 0.141

May

ACETOCHLOR 3 4.767 -15.098 24.631 0.200 0.100 14.000 n/a n/a 13.900 n/a 63.943 7.996

ATRAZINE 3 11.367 -33.036 55.770 1.500 0.600 32.000 n/a n/a 31.400 n/a 319.503 17.875

METOLACHLOR 3 12.767 -39.371 64.904 0.900 0.400 37.000 n/a n/a 36.600 n/a 440.503 20.988

June

ACETOCHLOR 5 1.660 -1.300 4.620 0.800 0.300 5.900 0.400 0.900 5.600 0.500 5.683 2.384

ATRAZINE 5 11.540 -5.570 28.650 6.800 3.100 36.000 4.500 7.300 32.900 2.800 189.883 13.780

METOLACHLOR 5 12.760 -7.032 32.552 6.400 2.100 41.000 6.200 8.100 38.900 1.900 254.083 15.940

July

ACETOCHLOR 4 0.050 -0.109 0.209 0.000 0.000 0.200 0.000 0.100 0.200 0.100 0.010 0.100

ATRAZINE 4 0.675 -0.265 1.615 0.550 0.100 1.500 0.300 1.050 1.400 0.750 0.349 0.591

METOLACHLOR 4 0.775 0.108 1.442 0.600 0.500 1.400 0.550 1.000 0.900 0.450 0.176 0.419
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-8

Appendix V Descriptive Statistics

Table V-8 Station MS-8, Mississinewa River at Marion

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 15 0.607 0.044 1.169 0.200 0.000 3.900 0.000 0.700 3.900 0.700 1.032 1.016

ATRAZINE 15 4.113 0.660 7.567 1.300 0.100 23.000 0.800 5.700 22.900 4.900 38.886 6.236

METOLACHLOR 15 1.660 0.507 2.813 0.800 0.200 6.700 0.400 1.900 6.500 1.500 4.333 2.081

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.150 -0.485 0.785 0.150 0.100 0.200 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 0.500 -0.066 1.066 0.400 0.200 1.000 0.250 0.750 0.800 0.500 0.127 0.356

ATRAZINE 4 1.925 -0.622 4.472 1.300 0.800 4.300 1.050 2.800 3.500 1.750 2.562 1.601

METOLACHLOR 4 1.000 -0.319 2.319 0.750 0.300 2.200 0.500 1.500 1.900 1.000 0.687 0.829

June

ACETOCHLOR 5 1.380 -0.485 3.245 0.700 0.200 3.900 0.500 1.600 3.700 1.100 2.257 1.502

ATRAZINE 5 9.960 -0.319 20.239 5.900 2.200 23.000 5.700 13.000 20.800 7.300 68.533 8.278

METOLACHLOR 5 3.540 0.092 6.988 1.900 0.900 6.700 1.800 6.400 5.800 4.600 7.713 2.777

July

ACETOCHLOR 4 0.050 -0.109 0.209 0.000 0.000 0.200 0.000 0.100 0.200 0.100 0.010 0.100

ATRAZINE 4 0.975 -0.218 2.168 0.850 0.200 2.000 0.500 1.450 1.800 0.950 0.563 0.750

METOLACHLOR 4 0.700 0.134 1.266 0.600 0.400 1.200 0.450 0.950 0.800 0.500 0.127 0.356
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-9

Appendix V Descriptive Statistics

Table V-9 Station MS-7, Mississinewa River at Peoria

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 15 0.673 0.270 1.076 0.400 0.000 2.500 0.200 0.900 2.500 0.700 0.529 0.727

ATRAZINE 15 4.167 1.381 6.952 1.600 0.000 17.000 0.700 6.500 17.000 5.800 25.297 5.030

METOLACHLOR 15 2.107 1.014 3.199 1.500 0.300 7.000 0.600 2.700 6.700 2.100 3.891 1.972

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.250 -0.385 0.885 0.250 0.200 0.300 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.300 n/a n/a 0.300 0.300 0.300 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 0.225 -0.047 0.497 0.250 0.000 0.400 0.100 0.350 0.400 0.250 0.029 0.171

ATRAZINE 4 1.225 -0.677 3.127 1.050 0.000 2.800 0.350 2.100 2.800 1.750 1.429 1.195

METOLACHLOR 4 0.775 0.282 1.268 0.700 0.500 1.200 0.550 1.000 0.700 0.450 0.096 0.310

June

ACETOCHLOR 4 1.350 -0.064 2.764 1.150 0.600 2.500 0.650 2.050 1.900 1.400 0.790 0.889

ATRAZINE 4 8.750 -0.757 18.257 6.850 4.300 17.000 4.350 13.150 12.700 8.800 35.697 5.975

METOLACHLOR 4 3.125 -1.035 7.285 2.000 1.500 7.000 1.550 4.700 5.500 3.150 6.836 2.615

July

ACETOCHLOR 5 0.760 0.033 1.487 0.600 0.200 1.700 0.400 0.900 1.500 0.500 0.343 0.586

ATRAZINE 5 4.420 -1.571 10.411 1.600 1.000 12.000 1.000 6.500 11.000 5.500 23.282 4.825

METOLACHLOR 5 3.080 1.005 5.155 2.700 1.200 5.500 2.100 3.900 4.300 1.800 2.792 1.671
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-10

Appendix V Descriptive Statistics

Table V-10 Station WB-370, Wabash River at Peru

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 1.313 0.489 2.138 0.800 0.000 5.200 0.200 1.800 5.200 1.600 2.217 1.489

ATRAZINE 15 3.727 1.243 6.210 1.800 0.200 15.000 0.700 4.100 14.800 3.400 20.115 4.485

METOLACHLOR 15 2.740 1.056 4.424 1.400 0.200 11.000 1.000 3.400 10.800 2.400 9.250 3.041

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

 May

ACETOCHLOR 4 0.725 0.199 1.251 0.750 0.300 1.100 0.500 0.950 0.800 0.450 0.109 0.330

ATRAZINE 4 1.725 0.483 2.967 1.800 0.700 2.600 1.250 2.200 1.900 0.950 0.609 0.780

METOLACHLOR 4 1.150 0.354 1.946 1.100 0.600 1.800 0.800 1.500 1.200 0.700 0.250 0.500

June

ACETOCHLOR 4 2.425 -0.824 5.674 1.900 0.700 5.200 0.900 3.950 4.500 3.050 4.169 2.042

ATRAZINE 4 8.950 -0.423 18.323 8.550 3.700 15.000 3.900 14.000 11.300 10.100 34.697 5.890

METOLACHLOR 4 5.150 -1.876 12.176 4.100 1.400 11.000 1.750 8.550 9.600 6.800 19.497 4.416

July

ACETOCHLOR 5 1.420 -0.376 3.216 1.200 0.200 3.700 0.200 1.800 3.500 1.600 2.092 1.446

ATRAZINE 5 2.560 -0.136 5.256 1.800 0.700 6.000 1.000 3.300 5.300 2.300 4.713 2.171

METOLACHLOR 5 3.100 0.099 6.101 2.900 1.000 7.000 1.200 3.400 6.000 2.200 5.840 2.417
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-11

Appendix V Descriptive Statistics

Table V-11 Station PIP-11, Pipe Creek near Bunker Hill

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 0.387 0.087 0.686 0.200 0.000 2.100 0.100 0.600 2.100 0.500 0.293 0.541

ATRAZINE 15 1.440 0.623 2.257 1.000 0.000 5.200 0.400 1.800 5.200 1.400 2.175 1.475

METOLACHLOR 15 1.847 1.015 2.679 1.600 0.200 5.600 0.700 2.300 5.400 1.600 2.257 1.502

April

ACETOCHLOR 2 1.350 -8.180 10.880 1.350 0.600 2.100 n/a n/a 1.500 n/a 1.125 1.061

ATRAZINE 2 2.300 -21.842 26.442 2.300 0.400 4.200 n/a n/a 3.800 n/a 7.220 2.687

METOLACHLOR 2 3.150 -27.980 34.280 3.150 0.700 5.600 n/a n/a 4.900 n/a 12.005 3.465

 May

ACETOCHLOR 4 0.350 -0.266 0.966 0.250 0.000 0.900 0.100 0.600 0.900 0.500 0.150 0.387

ATRAZINE 4 1.100 -0.186 2.386 1.300 0.000 1.800 0.500 1.700 1.800 1.200 0.653 0.808

METOLACHLOR 4 1.475 0.874 2.076 1.500 1.100 1.800 1.150 1.800 0.700 0.650 0.143 0.377

June

ACETOCHLOR 4 0.325 -0.028 0.678 0.300 0.100 0.600 0.150 0.500 0.500 0.350 0.049 0.222

ATRAZINE 4 2.075 -1.326 5.476 1.250 0.600 5.200 0.700 3.450 4.600 2.750 4.569 2.138

METOLACHLOR 4 1.950 -1.073 4.973 1.400 0.500 4.500 0.500 3.400 4.000 2.900 3.610 1.900

July

ACETOCHLOR 5 0.080 -0.024 0.184 0.100 0.000 0.200 0.000 0.100 0.200 0.100 0.007 0.084

ATRAZINE 5 0.860 -0.088 1.808 0.400 0.300 2.100 0.400 1.100 1.800 0.700 0.583 0.764

METOLACHLOR 5 1.540 0.318 2.762 1.600 0.200 2.700 1.000 2.200 2.500 1.200 0.968 0.984
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-12

Appendix V Descriptive Statistics

Table V-12 Station ELL-53, Eel River at North Manchester

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 15 0.367 0.014 0.720 0.200 0.000 2.500 0.000 0.300 2.500 0.300 0.407 0.638

ATRAZINE 15 1.173 0.004 2.343 0.400 0.000 8.300 0.200 1.400 8.300 1.200 4.458 2.111

METOLACHLOR 15 0.807 0.069 1.544 0.200 0.000 5.000 0.200 0.900 5.000 0.700 1.775 1.332

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.050 -0.585 0.685 0.050 0.000 0.100 n/a n/a 0.100 n/a 0.005 0.071

May

ACETOCHLOR 4 0.225 -0.103 0.553 0.200 0.000 0.500 0.100 0.350 0.500 0.250 0.043 0.206

ATRAZINE 4 0.425 0.097 0.753 0.450 0.200 0.600 0.250 0.600 0.400 0.350 0.042 0.206

METOLACHLOR 4 0.250 0.091 0.409 0.200 0.200 0.400 0.200 0.300 0.200 0.100 0.010 0.100

June

ACETOCHLOR 4 0.750 -1.117 2.617 0.250 0.000 2.500 0.100 1.400 2.500 1.300 1.377 1.173

ATRAZINE 4 2.550 -3.611 8.711 0.850 0.200 8.300 0.250 4.850 8.100 4.600 14.990 3.872

METOLACHLOR 4 1.550 -2.153 5.253 0.550 0.100 5.000 0.150 2.950 4.900 2.800 5.417 2.327

July

ACETOCHLOR 5 0.320 -0.114 0.754 0.300 0.000 0.900 0.100 0.300 0.900 0.200 0.122 0.349

ATRAZINE 5 1.140 -0.211 2.491 0.500 0.400 2.900 0.400 1.500 2.500 1.100 1.183 1.088

METOLACHLOR 5 0.960 -0.258 2.178 0.600 0.200 2.600 0.300 1.100 2.400 0.800 0.963 0.981
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-13

Appendix V Descriptive Statistics

Table V-13 Station ELL-7, Eel River near Logansport

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 15 1.487 -0.493 3.466 0.400 0.000 14.000 0.000 1.200 14.000 1.200 12.776 3.574

ATRAZINE 15 2.573 -0.070 5.217 0.900 0.100 18.000 0.400 2.200 17.900 1.800 22.788 4.774

METOLACHLOR 15 1.540 -0.021 3.101 0.500 0.000 9.900 0.300 1.100 9.900 0.800 7.947 2.819

 April

ACETOCHLOR 2 0.050 -0.585 0.685 0.050 0.000 0.100 n/a n/a 0.100 n/a 0.005 0.071

ATRAZINE 2 0.150 -0.485 0.785 0.150 0.100 0.200 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

 May

ACETOCHLOR 4 4.050 -6.566 14.666 1.100 0.000 14.000 0.250 7.850 14.000 7.600 44.510 6.672

ATRAZINE 4 5.475 -7.877 18.827 1.850 0.200 18.000 0.850 10.100 17.800 9.250 70.409 8.391

METOLACHLOR 4 2.925 -4.489 10.339 0.750 0.300 9.900 0.400 5.450 9.600 5.050 21.709 4.659

June

ACETOCHLOR 4 1.275 -0.980 3.530 0.800 0.200 3.300 0.300 2.250 3.100 1.950 2.009 1.417

ATRAZINE 4 3.250 -2.729 9.229 1.800 0.600 8.800 1.000 5.500 8.200 4.500 14.117 3.757

METOLACHLOR 4 2.075 -2.764 6.914 0.750 0.200 6.600 0.300 3.850 6.400 3.550 9.249 3.041

July

ACETOCHLOR 5 0.180 -0.074 0.434 0.100 0.000 0.400 0.000 0.400 0.400 0.400 0.042 0.205

ATRAZINE 5 0.680 0.359 1.001 0.600 0.400 1.000 0.500 0.900 0.600 0.400 0.067 0.259

METOLACHLOR 5 0.620 0.144 1.096 0.500 0.300 1.200 0.300 0.800 0.900 0.500 0.147 0.383
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-14

Appendix V Descriptive Statistics

Table V-14 Station WB-354, Wabash River at Logansport

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 1.053 0.333 1.773 0.700 0.000 4.600 0.200 1.200 4.600 1.000 1.690 1.300

ATRAZINE 15 3.607 0.797 6.417 1.600 0.000 16.000 0.600 4.500 16.000 3.900 25.749 5.074

METOLACHLOR 15 2.720 0.817 4.623 1.200 0.200 13.000 1.000 3.600 12.800 2.600 11.806 3.436

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.100 -1.171 1.371 0.100 0.000 0.200 n/a n/a 0.200 n/a 0.020 0.141

METOLACHLOR 2 0.250 -0.385 0.885 0.250 0.200 0.300 n/a n/a 0.100 n/a 0.005 0.071

May

ACETOCHLOR 4 0.675 0.475 0.875 0.700 0.500 0.800 0.600 0.750 0.300 0.150 0.016 0.126

ATRAZINE 4 1.700 -0.183 3.583 1.300 0.800 3.400 0.900 2.500 2.600 1.600 1.400 1.183

METOLACHLOR 4 1.225 0.410 2.040 1.150 0.700 1.900 0.850 1.600 1.200 0.750 0.263 0.512

June

ACETOCHLOR 4 2.175 -0.828 5.178 1.850 0.400 4.600 0.700 3.650 4.200 2.950 3.562 1.887

ATRAZINE 4 9.525 -1.542 20.592 9.750 2.600 16.000 3.550 15.500 13.400 11.950 48.369 6.955

METOLACHLOR 4 5.700 -3.029 14.429 4.400 1.000 13.000 1.500 9.900 12.000 8.400 30.093 5.486

July

ACETOCHLOR 5 0.880 -0.501 2.261 0.200 0.100 2.700 0.200 1.200 2.600 1.000 1.237 1.112

ATRAZINE 5 1.800 -0.652 4.252 1.000 0.400 5.200 0.600 1.800 4.800 1.200 3.900 1.975

METOLACHLOR 5 2.520 -0.066 5.106 1.200 1.000 5.700 1.100 3.600 4.700 2.500 4.337 2.083
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-15

Appendix V Descriptive Statistics

Table V-15 Station DC-5, Deer Creek near Delphi

Confid. Confid. Lower Upper Quartile

Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

April-July

ACETOCHLOR 14 0.236 0.081 0.390 0.100 0.000 0.800 0.100 0.300 0.800 0.200 0.072 0.268

ATRAZINE 14 1.229 0.580 1.877 0.750 0.300 3.500 0.400 2.000 3.200 1.600 1.262 1.123

METOLACHLOR 14 1.600 0.658 2.542 1.150 0.200 6.400 0.500 2.200 6.200 1.700 2.663 1.632

April

ACETOCHLOR 2 0.250 -0.385 0.885 0.250 0.200 0.300 n/a n/a 0.100 n/a 0.005 0.071

ATRAZINE 2 0.300 n/a n/a 0.300 0.300 0.300 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 3 0.467 -0.332 1.265 0.600 0.100 0.700 n/a n/a 0.600 n/a 0.103 0.321

ATRAZINE 3 2.200 -0.812 5.212 2.900 0.800 2.900 n/a n/a 2.100 n/a 1.470 1.212

METOLACHLOR 3 1.667 -0.990 4.323 1.900 0.500 2.600 n/a n/a 2.100 n/a 1.143 1.069

June

ACETOCHLOR 4 0.250 -0.338 0.838 0.100 0.000 0.800 0.050 0.450 0.800 0.400 0.137 0.370

ATRAZINE 4 1.825 -0.202 3.852 1.650 0.500 3.500 0.900 2.750 3.000 1.850 1.623 1.274

METOLACHLOR 4 2.400 -2.038 6.838 1.450 0.300 6.400 0.500 4.300 6.100 3.800 7.780 2.789

July

ACETOCHLOR 5 0.080 -0.024 0.184 0.100 0.000 0.200 0.000 0.100 0.200 0.100 0.007 0.084

ATRAZINE 5 0.540 0.228 0.852 0.400 0.300 0.900 0.400 0.700 0.600 0.300 0.063 0.251

METOLACHLOR 5 1.480 0.513 2.447 1.500 0.600 2.300 0.800 2.200 1.700 1.400 0.607 0.779
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-16

Appendix V Descriptive Statistics

Table V-16 Station TR-159, Tippecanoe River at Oswego

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 0.013 -0.015 0.042 0.000 0.000 0.200 0.000 0.000 0.200 0.000 0.003 0.052

ATRAZINE 15 0.400 0.311 0.489 0.400 0.000 0.600 0.300 0.500 0.600 0.200 0.026 0.160

METOLACHLOR 15 0.200 0.145 0.255 0.200 0.100 0.500 0.100 0.200 0.400 0.100 0.010 0.100

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.250 -2.927 3.427 0.250 0.000 0.500 n/a n/a 0.500 n/a 0.125 0.354

METOLACHLOR 2 0.150 -0.485 0.785 0.150 0.100 0.200 n/a n/a 0.100 n/a 0.005 0.071

 May

ACETOCHLOR 4 0.000 n/a n/a 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

ATRAZINE 4 0.350 0.074 0.626 0.300 0.200 0.600 0.250 0.450 0.400 0.200 0.030 0.173

METOLACHLOR 4 0.150 0.058 0.242 0.150 0.100 0.200 0.100 0.200 0.100 0.100 0.003 0.058

June

ACETOCHLOR 4 0.050 -0.109 0.209 0.000 0.000 0.200 0.000 0.100 0.200 0.100 0.010 0.100

ATRAZINE 4 0.450 0.291 0.609 0.400 0.400 0.600 0.400 0.500 0.200 0.100 0.010 0.100

METOLACHLOR 4 0.275 0.036 0.514 0.200 0.200 0.500 0.200 0.350 0.300 0.150 0.022 0.150

July

ACETOCHLOR 5 0.000 n/a n/a 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

ATRAZINE 5 0.460 0.349 0.571 0.500 0.300 0.500 0.500 0.500 0.200 0.000 0.008 0.089

METOLACHLOR 5 0.200 0.112 0.288 0.200 0.100 0.300 0.200 0.200 0.200 0.000 0.005 0.071
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-17

Appendix V Descriptive Statistics

Table V-17 Station TR-79, Tippecanoe River near Ora

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 14 0.214 -0.022 0.451 0.000 0.000 1.300 0.000 0.200 1.300 0.200 0.167 0.409

ATRAZINE 14 0.636 0.290 0.981 0.450 0.000 1.800 0.300 0.800 1.800 0.500 0.358 0.598

METOLACHLOR 14 0.421 -0.010 0.853 0.200 0.000 2.900 0.000 0.400 2.900 0.400 0.559 0.747

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

 May

ACETOCHLOR 4 0.375 -0.618 1.368 0.100 0.000 1.300 0.000 0.750 1.300 0.750 0.389 0.624

ATRAZINE 4 0.725 -0.489 1.939 0.550 0.000 1.800 0.250 1.200 1.800 0.950 0.583 0.763

METOLACHLOR 4 0.275 0.123 0.427 0.250 0.200 0.400 0.200 0.350 0.200 0.150 0.009 0.096

 June

ACETOCHLOR 3 0.067 -0.220 0.354 0.000 0.000 0.200 n/a n/a 0.200 n/a 0.013 0.115

ATRAZINE 3 0.633 -0.592 1.859 0.400 0.300 1.200 n/a n/a 0.900 n/a 0.243 0.493

METOLACHLOR 3 0.133 -0.440 0.707 0.000 0.000 0.400 n/a n/a 0.400 n/a 0.053 0.231

July

ACETOCHLOR 5 0.260 -0.264 0.784 0.100 0.000 1.000 0.000 0.200 1.000 0.200 0.178 0.422

ATRAZINE 5 0.820 0.083 1.557 0.800 0.300 1.800 0.400 0.800 1.500 0.400 0.352 0.593

METOLACHLOR 5 0.880 -0.561 2.321 0.400 0.100 2.900 0.200 0.800 2.800 0.600 1.347 1.161
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-18

Appendix V Descriptive Statistics

Table V-18 Station TR-9, Tippecanoe River near Delphi

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 0.320 0.089 0.551 0.200 0.000 1.600 0.000 0.400 1.600 0.400 0.175 0.418

ATRAZINE 15 1.773 0.512 3.035 1.000 0.000 8.600 0.400 2.100 8.600 1.700 5.188 2.278

METOLACHLOR 15 0.893 0.294 1.493 0.500 0.000 4.400 0.300 1.300 4.400 1.000 1.172 1.083

 April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.100 -1.171 1.371 0.100 0.000 0.200 n/a n/a 0.200 n/a 0.020 0.141

METOLACHLOR 2 0.050 -0.585 0.685 0.050 0.000 0.100 n/a n/a 0.100 n/a 0.005 0.071

May

ACETOCHLOR 4 0.325 -0.150 0.800 0.300 0.000 0.700 0.100 0.550 0.700 0.450 0.089 0.299

ATRAZINE 4 1.200 -0.543 2.943 0.800 0.400 2.800 0.500 1.900 2.400 1.400 1.200 1.095

METOLACHLOR 4 0.675 0.089 1.261 0.700 0.200 1.100 0.450 0.900 0.900 0.450 0.136 0.369

June

ACETOCHLOR 4 0.700 -0.289 1.689 0.500 0.200 1.600 0.300 1.100 1.400 0.800 0.387 0.622

ATRAZINE 4 4.325 -0.799 9.449 3.550 1.600 8.600 1.850 6.800 7.000 4.950 10.369 3.220

METOLACHLOR 4 1.725 -1.242 4.692 1.050 0.400 4.400 0.450 3.000 4.000 2.550 3.476 1.864

July

ACETOCHLOR 5 0.140 -0.027 0.307 0.200 0.000 0.300 0.000 0.200 0.300 0.200 0.018 0.134

ATRAZINE 5 0.860 0.315 1.405 0.700 0.400 1.500 0.600 1.100 1.100 0.500 0.193 0.439

METOLACHLOR 5 0.740 0.097 1.383 0.500 0.300 1.300 0.300 1.300 1.000 1.000 0.268 0.518
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-19

Appendix V Descriptive Statistics

Table V-19 Station WC-80, Wildcat Creek near Jerome

Confid. Confid. Lower Upper Quartile

April-May Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 0.450 0.058 0.835 0.200 0.000 2.600 0.000 0.500 2.600 0.500 0.493 0.702

ATRAZINE 15 2.860 0.861 4.859 1.300 0.000 11.000 0.300 4.100 11.000 3.800 13.025 3.609

METOLACHLOR 15 1.480 0.600 2.360 0.900 0.200 5.700 0.600 2.100 5.500 1.500 2.527 1.590

April

ACETOCHLOR 2 0.100 -1.171 1.371 0.100 0.000 0.200 n/a n/a 0.200 n/a 0.020 0.141

ATRAZINE 2 0.300 n/a n/a 0.300 0.300 0.300 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.550 -0.085 1.185 0.550 0.500 0.600 n/a n/a 0.100 n/a 0.005 0.071

May

ACETOCHLOR 4 0.825 -1.059 2.709 0.250 0.200 2.600 0.200 1.450 2.400 1.250 1.403 1.184

ATRAZINE 4 2.900 -4.684 10.484 0.800 0.000 10.000 0.150 5.650 10.000 5.500 22.713 4.766

METOLACHLOR 4 0.625 -0.079 1.329 0.600 0.200 1.100 0.250 1.000 0.900 0.750 0.195 0.443

June

ACETOCHLOR 4 0.675 -0.229 1.579 0.500 0.200 1.500 0.350 1.000 1.300 0.650 0.323 0.568

ATRAZINE 4 5.425 -1.706 12.556 4.550 1.600 11.000 1.800 9.050 9.400 7.250 20.083 4.481

METOLACHLOR 4 2.950 -1.085 6.985 2.750 0.600 5.700 0.800 5.100 5.100 4.300 6.430 2.536

July

ACETOCHLOR 5 0.100 -0.076 0.276 0.000 0.000 0.300 0.000 0.200 0.300 0.200 0.020 0.141

ATRAZINE 5 1.800 -0.054 3.654 1.100 0.600 4.100 0.700 2.500 3.500 1.800 2.230 1.493

METOLACHLOR 5 1.360 0.454 2.266 1.000 0.700 2.200 0.800 2.100 1.500 1.300 0.533 0.730
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-20

Appendix V Descriptive Statistics

Table V-20 Station WC-60, Wildcat Creek at Kokomo

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 0.287 0.094 0.479 0.200 0.000 1.100 0.000 0.400 1.100 0.400 0.121 0.348

ATRAZINE 15 2.153 0.861 3.446 1.200 0.200 8.000 0.700 2.600 7.800 1.900 5.446 2.334

METOLACHLOR 15 1.433 0.625 2.241 0.900 0.300 5.500 0.300 2.200 5.200 1.900 2.123 1.459

April

ACETOCHLOR 2 0.050 -0.585 0.685 0.050 0.000 0.100 n/a n/a 0.100 n/a 0.005 0.071

ATRAZINE 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.300 n/a n/a 0.300 0.300 0.300 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 0.475 -0.126 1.076 0.400 0.100 1.000 0.250 0.700 0.900 0.450 0.143 0.377

ATRAZINE 4 1.525 0.318 2.732 1.300 0.900 2.600 1.000 2.050 1.700 1.050 0.576 0.759

METOLACHLOR 4 0.975 0.202 1.748 0.900 0.500 1.600 0.600 1.350 1.100 0.750 0.236 0.486

June

ACETOCHLOR 4 0.475 -0.241 1.191 0.350 0.100 1.100 0.150 0.800 1.000 0.650 0.203 0.450

ATRAZINE 4 4.225 -1.580 10.030 3.950 1.000 8.000 1.100 7.350 7.000 6.250 13.309 3.648

METOLACHLOR 4 2.400 -1.671 6.471 1.900 0.300 5.500 0.300 4.500 5.200 4.200 6.547 2.559

July

ACETOCHLOR 5 0.080 -0.056 0.216 0.000 0.000 0.200 0.000 0.200 0.200 0.200 0.012 0.110

ATRAZINE 5 1.780 0.079 3.481 1.600 0.500 3.900 0.700 2.200 3.400 1.500 1.877 1.370

METOLACHLOR 5 1.480 0.537 2.423 1.100 0.800 2.400 0.900 2.200 1.600 1.300 0.577 0.760
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-21

Appendix V Descriptive Statistics

Table V-21 Station WC-15, Wildcat Creek at Owasco

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 14 0.25 0.046 0.454 0.150 0.00 1.300 0.000 0.300 1.300 0.300 0.124 0.352

ATRAZINE 14 1.81428 0.406 3.222 1.000 0.200 9.000 0.400 1.800 8.800 1.400 5.946 2.438

METOLACHLOR 14 1.19285 0.332 2.054 0.700 0.200 5.600 0.300 1.300 5.400 1.000 2.224 1.491

April Confid. Confid

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 0.350 0.074 0.626 0.300 0.200 0.600 0.250 0.450 0.400 0.200 0.030 0.173

ATRAZINE 4 1.400 0.267 2.533 1.600 0.400 2.000 0.900 1.900 1.600 1.000 0.507 0.712

METOLACHLOR 4 0.825 0.316 1.334 0.700 0.600 1.300 0.650 1.000 0.700 0.350 0.103 0.320

June

ACETOCHLOR 3 0.467 -1.330 2.264 0.100 0.000 1.300 n/a n/a 1.300 n/a 0.523 0.723

ATRAZINE 3 3.533 -8.230 15.297 0.900 0.700 9.000 n/a n/a 8.300 n/a 22.423 4.735

METOLACHLOR 3 2.033 -5.641 9.707 0.300 0.200 5.600 n/a n/a 5.400 n/a 9.543 3.089

July

ACETOCHLOR 5 0.14 -0.068 0.348 0.100 0.000 0.400 0.000 0.200 0.400 0.200 0.028 0.167

ATRAZINE 5 1.76 -0.735 4.255 1.100 0.400 5.300 0.700 1.300 4.900 0.600 4.038 2.009

METOLACHLOR 5 1.38 0.033 2.727 1.000 0.500 3.200 0.700 1.500 2.700 0.800 1.177 1.084
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-22

Appendix V Descriptive Statistics

Table V-22 Station WCS-.4, South Fork Wildcat Creek near Lafayette

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 14 0.357 0.059 0.656 0.200 0.000 1.700 0.000 0.300 1.700 0.300 0.267 0.517

ATRAZINE 14 1.764 0.699 2.830 1.150 0.000 5.500 0.400 2.600 5.500 2.200 3.404 1.845

METOLACHLOR 14 1.579 0.519 2.638 0.950 0.100 6.700 0.400 1.900 6.600 1.500 3.366 1.835

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.150 -1.756 2.056 0.150 0.000 0.300 n/a n/a 0.300 n/a 0.045 0.212

METOLACHLOR 2 0.300 -2.241 2.841 0.300 0.100 0.500 n/a n/a 0.400 n/a 0.080 0.283

May

ACETOCHLOR 3 1.033 -0.711 2.778 1.100 0.300 1.700 n/a n/a 1.400 n/a 0.493 0.702

ATRAZINE 3 3.667 -1.510 8.844 4.100 1.400 5.500 n/a n/a 4.100 n/a 4.343 2.084

METOLACHLOR 3 3.533 -3.761 10.828 3.000 0.900 6.700 n/a n/a 5.800 n/a 8.623 2.937

June

ACETOCHLOR 4 0.350 -0.266 0.966 0.250 0.000 0.900 0.100 0.600 0.900 0.500 0.150 0.387

ATRAZINE 4 2.475 -0.503 5.453 2.150 0.600 5.000 1.150 3.800 4.400 2.650 3.503 1.871

METOLACHLOR 4 1.675 -0.931 4.281 1.250 0.300 3.900 0.450 2.900 3.600 2.450 2.683 1.638

July

ACETOCHLOR 5 0.100 -0.076 0.276 0.000 0.000 0.300 0.000 0.200 0.300 0.200 0.020 0.141

ATRAZINE 5 0.700 0.003 1.397 0.700 0.000 1.500 0.400 0.900 1.500 0.500 0.315 0.561

METOLACHLOR 5 0.840 0.254 1.426 1.000 0.300 1.400 0.400 1.100 1.100 0.700 0.223 0.472
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-23

Appendix V Descriptive Statistics

Table V-23 Station WC-5, Wildcat Creek near Lafayette

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 14 0.479 0.161 0.797 0.200 0.000 1.400 0.000 1.200 1.400 1.200 0.303 0.551

ATRAZINE 14 2.014 0.774 3.254 1.200 0.000 7.600 0.700 2.700 7.600 2.000 4.614 2.148

METOLACHLOR 14 1.600 0.673 2.527 1.100 0.100 6.000 0.500 2.600 5.900 2.100 2.580 1.606

April

ACETOCHLOR 2 0.100 -1.171 1.371 0.100 0.000 0.200 n/a n/a 0.200 n/a 0.020 0.141

ATRAZINE 2 0.150 -0.485 0.785 0.150 0.100 0.200 n/a n/a 0.100 n/a 0.005 0.071

METOLACHLOR 2 0.150 -0.485 0.785 0.150 0.100 0.200 n/a n/a 0.100 n/a 0.005 0.071

May

ACETOCHLOR 3 1.033 0.093 1.974 1.200 0.600 1.300 n/a n/a 0.700 n/a 0.143 0.379

ATRAZINE 3 2.933 -0.458 6.324 2.700 1.700 4.400 n/a n/a 2.700 n/a 1.863 1.365

METOLACHLOR 3 2.033 -0.207 4.274 2.100 1.100 2.900 n/a n/a 1.800 n/a 0.813 0.902

June

ACETOCHLOR 4 0.475 -0.543 1.493 0.250 0.000 1.400 0.050 0.900 1.400 0.850 0.409 0.640

ATRAZINE 4 3.425 -1.641 8.491 2.700 0.700 7.600 0.950 5.900 6.900 4.950 10.136 3.184

METOLACHLOR 4 2.350 -1.861 6.561 1.550 0.300 6.000 0.400 4.300 5.700 3.900 7.003 2.646

July

ACETOCHLOR 5 0.300 -0.333 0.933 0.100 0.000 1.200 0.000 0.200 1.200 0.200 0.260 0.510

ATRAZINE 5 1.080 -0.166 2.326 0.800 0.000 2.700 0.700 1.200 2.700 0.500 1.007 1.003

METOLACHLOR 5 1.320 0.161 2.479 1.100 0.500 2.900 0.800 1.300 2.400 0.500 0.872 0.934
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

V-24

Appendix V Descriptive Statistics

Table V-24 Station WB-311 Wabash River at Lafayette

Confid. Confid. Lower Upper Quartile

April-July Valid N Mean -95.000% +95.000% Median Minimum Maximum Quartile Quartile Range Range Variance Std.Dev.

ACETOCHLOR 15 0.593 0.250 0.936 0.500 0.000 2.300 0.200 0.700 2.300 0.500 0.384 0.619

ATRAZINE 15 2.480 0.739 4.221 1.300 0.200 10.000 0.700 2.500 9.800 1.800 9.880 3.143

METOLACHLOR 15 1.607 0.672 2.541 1.000 0.200 6.200 0.500 2.000 6.000 1.500 2.846 1.687

April

ACETOCHLOR 2 0.000 n/a n/a 0.000 0.000 0.000 n/a n/a 0.000 n/a 0.000 0.000

ATRAZINE 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

METOLACHLOR 2 0.200 n/a n/a 0.200 0.200 0.200 n/a n/a 0.000 n/a 0.000 0.000

May

ACETOCHLOR 4 0.625 0.353 0.897 0.650 0.400 0.800 0.500 0.750 0.400 0.250 0.029 0.171

ATRAZINE 4 1.575 0.204 2.946 1.550 0.700 2.500 0.850 2.300 1.800 1.450 0.743 0.862

METOLACHLOR 4 0.975 0.139 1.811 0.850 0.500 1.700 0.600 1.350 1.200 0.750 0.276 0.525

June

ACETOCHLOR 4 1.175 -0.342 2.692 1.100 0.200 2.300 0.400 1.950 2.100 1.550 0.909 0.954

ATRAZINE 4 6.200 -0.703 13.103 6.750 1.300 10.000 2.550 9.850 8.700 7.300 18.820 4.338

METOLACHLOR 4 3.050 -1.408 7.508 2.800 0.400 6.200 0.700 5.400 5.800 4.700 7.850 2.802

July

ACETOCHLOR 5 0.340 0.083 0.597 0.300 0.100 0.600 0.200 0.500 0.500 0.300 0.043 0.207

ATRAZINE 5 1.140 0.347 1.933 1.300 0.300 1.900 0.700 1.500 1.600 0.800 0.408 0.639

METOLACHLOR 5 1.520 0.748 2.292 1.800 0.800 2.100 0.900 2.000 1.300 1.100 0.387 0.622
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

APPENDIX VI

GRAPHS OF THE VARIATION IN PESTICIDES OVER TIME
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-1

Appendix VI

List of Graphs

GRAPH VI-1 WABASH RIVER AT LINN GROVE............................................................................................................... 2

GRAPH VI-2 WABASH RIVER AT HUNTINGTON.............................................................................................................. 2

GRAPH VI-3 LITTLE RIVER NEAR HUNTINGTON............................................................................................................. 3

GRAPH VI-4 SALAMONIE RIVER NEAR WARREN............................................................................................................ 3

GRAPH VI-5 SALAMONIE RIVER AT DORA ..................................................................................................................... 4

GRAPH VI-6 WABASH RIVER AT CITY OF WABASH ....................................................................................................... 4

GRAPH VI-7 MISSISSINEWA RIVER NEAR RIDGEVILLE ................................................................................................... 5

GRAPH VI-8 MISSISSINEWA RIVER AT MARION ............................................................................................................. 5

GRAPH VI-9 MISSISSINEWA RIVER AT PEORIA............................................................................................................... 6

GRAPH VI-10 WABASH RIVER AT PERU ........................................................................................................................ 6

GRAPH VI-11 PIPE CREEK NEAR BUNKER HILL ............................................................................................................. 7

GRAPH VI-12 EEL RIVER AT NORTH MANCHESTER....................................................................................................... 7

GRAPH VI-13 EEL RIVER NEAR LOGANSPORT ............................................................................................................... 8

GRAPH VI-14 WABASH RIVER AT LOGANSPORT............................................................................................................ 8

GRAPH VI-15 DEER CREEK NEAR DELPHI...................................................................................................................... 9

GRAPH VI-16 TIPPECANOE RIVER AT OSWEGO.............................................................................................................. 9

GRAPH VI-17 TIPPECANOE RIVER NEAR ORA.............................................................................................................. 10

GRAPH VI-18 TIPPECANOE RIVER NEAR DELPHI.......................................................................................................... 10

GRAPH VI-19 WILDCAT CREEK NEAR JEROME ............................................................................................................ 11

GRAPH VI-20 WILDCAT CREEK AT KOKOMO .............................................................................................................. 11

GRAPH VI-21 WILDCAT CREEK AT OWASCO ............................................................................................................... 12

GRAPH VI-22 SOUTH FORK WILDCAT CREEK NEAR LAFAYETTE................................................................................. 12

GRAPH VI-23 WILDCAT CREEK NEAR LAFAYETTE ...................................................................................................... 13

GRAPH VI-24 WABASH RIVER AT LAFAYETTE ............................................................................................................ 13
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-2

 

Graph VI-1 Wabash River at Linn Grove

Graph VI-2 Wabash River at Huntington

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WB-409

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

20

22

24

26

4/20 4/27 5/06 5/13 5/20 5/29 6/05 6/11 6/17 6/24 6/30 7/08 7/15 7/21 7/29

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site LR-8

1998

Concentration 

ug/L

0

1

2

3

4

5

6

7

8

9

10

4/20 4/27 5/13 5/20 5/29 6/05 6/11 6/17 6/24 7/08 7/15 7/21 7/29

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WB-445

Sample Date

Concentration

ug/L

0

2

4

6

8

10

12

4/20 4/27 5/06 5/13 5/20 5/29 6/05 6/11 6/17 6/24 6/30 7/08 7/15 7/21 7/29
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-3

Graph VI-3 Little River near Huntington

Graph VI-4 Salamonie River near Warren

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site S-30

1998

Concentration

ug/L

0

2

4

6

8

10

12

14

16

18

20

22

4/20 4/27 5/06 5/13 5/20 5/29 6/05 6/11 6/17 6/24 6/30 7/08 7/15 7/21 7/29

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site LR-8

1998

Concentration 

ug/L

0

1

2

3

4

5

6

7

8

9

10

4/20 4/27 5/13 5/20 5/29 6/05 6/11 6/17 6/24 7/08 7/15 7/21 7/29
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-4

Graph VI-5 Salamonie River at Dora

Graph VI-6 Wabash River at City of Wabash

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WB-387

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

20

22

4/21 4/28 5/07 5/14 5/21 5/29 6/05 6/11 6/18 6/25 7/01 7/09 7/16 7/22 7/30

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site S-3

Sample Date

Concentration 

ug/L

0

1

2

3

4

5

6

7

8

9

10

11

4/20

4/27

5/06

5/13

5/20

5/29

6/05

6/11

6/17

6/24

6/30

7/08

7/15

7/21

7/29
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-5

Graph VI-7 Mississinewa River near Ridgeville

Graph VI-8 Mississinewa River at Marion

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation in Concentration Over Time

Site MS-36

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

20

22

24

26

4/20 4/30 5/06 5/13 5/20 5/29 6/05 6/11 6/17 6/24 6/30 7/08 7/15 7/21 7/29

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site MS-100

Sample Date

Concentration 

ug/L

0

10

20

30

40

4/20 4/27 5/13 5/20 5/29 6/05 6/11 6/17 6/24 6/30 7/08 7/15 7/21 7/29
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-6

Graph VI-9 Mississinewa River at Peoria

Graph VI-10 Wabash River at Peru

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site MS-7

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

20

22

4/21

4/28

5/07

5/14

5/21

5/28

6/04

6/10

6/18

6/25

7/01

7/09

7/16

7/22

7/30

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WB-370

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

4/21

4/28

5/07

5/14

5/21

5/28

6/04

6/10

6/18

6/25

7/01

7/09

7/16

7/22

7/30
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-7

Graph VI-11 Pipe Creek near Bunker Hill

Graph VI-12 Eel River at North Manchester

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site PIP-11

Sample Date

Concentration

ug/L

0

1

2

3

4

5

6

7

4/21 4/28 5/07 5/14 5/21 5/28 6/04 6/10 6/18 6/25 7/01 7/09 7/16 7/22 7/30

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site ELL-53

Sample Date

Concentration

ug/L

0

1

2

3

4

5

6

7

8

9

4/21

4/28

5/07

5/14

5/21

5/28

6/04

6/10

6/18

6/25

7/01

7/09

7/16

7/22

7/30
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-8

Graph VI-13 Eel River near Logansport

Graph VI-14 Wabash River at Logansport

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WB-354

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

4/21 4/28 5/07 5/14 5/21 5/28 6/04 6/10 6/18 6/25 7/01 7/09 7/16 7/22 7/30

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site ELL-7

Sample Date

Concentration 

ug/L

0

2

4

6

8

10

12

14

16

18

20

22

4/21

4/28

5/07

5/14

5/21

5/28

6/04

6/10

6/18

6/25

7/01

7/09

7/16

7/22

7/30
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-9

Graph VI-15 Deer Creek near Delphi

Graph VI-16 Tippecanoe River at Oswego

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation in Pesticide Concentration Over Time

Site DC-5

Sample Date

Concentration

ug/L

0

1

2

3

4

5

6

7

4/22

4/29

5/15

5/22

5/27

6/03

6/09

6/19

6/26

7/02

7/10

7/17

7/23

7/31

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site TR-159

Sample Date

Concentration 

ug/L

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

4/21

4/28

5/07

5/14

5/21

5/28

6/04

6/10

6/18

6/25

7/01

7/09

7/16

7/22

7/30
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-10

Graph VI-17 Tippecanoe River near Ora

Graph VI-18 Tippecanoe River near Delphi

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site TR-79

Sample Date

Concentration 

ug/L

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

4/21 4/28 5/07 5/14 5/21 5/28 6/04 6/10 6/25 7/01 7/09 7/16 7/22 7/30

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation in Pesticide Concentration Over Time

Site TR-9

Sample Date

Concentration

ug/L

0

1

2

3

4

5

6

7

8

9

10

11

4/22

4/29

5/04

5/15

5/22

5/27

6/03

6/09

6/19

6/26

7/02

7/10

7/17

7/23

7/31
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-11

Graph VI-19 Wildcat Creek near Jerome

Graph VI-20 Wildcat Creek at Kokomo

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation in Pesticide Concentration Over Time

Site WC-80

Sample Date

Concentration

ug/L

0

10

20

30

40

4/23

4/30

5/07

5/14

5/22

5/28

6/04

6/10

6/18

6/25

7/01

7/09

7/16

7/22

7/30

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WC-60

Sample Date

Concentration 

ug/L

0

10

20

30

40

50

60

70

80

4/23

4/30

5/07

5/14

5/22

5/28

6/04

6/10

6/19

6/25

7/02

7/10

7/16

7/23

7/31
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-12

Graph VI-21 Wildcat Creek at Owasco

Graph VI-22 South Fork Wildcat Creek near Lafayette

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WC-15

Sample Date

Concentration

ug/L

0

20

40

60

80

100

4/22 4/29 5/04 5/15 5/22 5/27 6/03 6/09 6/19 7/02 7/10 7/17 7/23 7/31

ACETOCHLOR

ATRAZINE

METOLACHLOR

Variation in Pesticide Concentration Over Time

Site WCS-4

Sample Date

Concentration

ug/L

0

10

20

30

40

50

4/22 4/29 5/15 5/22 5/27 6/03 6/09 6/19 6/26 7/02 7/10 7/17 7/23 7/31
An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI-13

Graph VI-23 Wildcat Creek near Lafayette

Graph VI-24 Wabash River at Lafayette

ATRAZINE

ACETOCHLOR

METOLACHLOR

Variation In Pesticide Concentration Over Time

Site WC-5

Sample Date

Concentration

ug/L

0

2

4

6

8

4/22 4/29 5/15 5/22 5/27 6/03 6/09 6/19 6/26 7/02 7/10 7/17 7/23 7/31

Atrazine

Acetochlor

Metolachlor

Variation In Pesticide Concenration Over Time

Site WB-311

Sample Date

Concentration

ug/L

0

2

4

6

8

10

12

4/22 4/29 5/04 5/15 5/22 5/27 6/03 6/09 6/19 6/26 7/02 7/10 7/17 7/23 7/31