# A n A s s e s s m e n t o f P e s t i c i d e s i n t h e U p p e r W a b a s h R i v e r B a s i n

O f f i c e o f W a t e r Q u a l i t y As s e s s m e n t B r a n c h F e b r u a r y 2 0 0 1 

# I D E M / 0 3 2 / 0 2 / 0 2 4

/ 2 0 0 1An 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 2001An 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 032/02/024/2001An 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



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



### v 

# Table of Contents

INTRODUCTION

................................ ................................ ................................ ................................ ...................... 1

STUDY AREA

................................ ................................ ................................ ................................ ............................. 3
L OCATION

................................ ................................ ................................ ................................ ................................ . 3 G EOLOGY

................................ ................................ ................................ ................................ ................................ .. 3 L AND U SE

................................ ................................ ................................ ................................ ................................ . 3 F LOW & D RAINAGE

................................ ................................ ................................ ................................ .................. 3 E ROSION POTENTIAL

................................ ................................ ................................ ................................ ................. 4 MATERIALS AND METHODS

................................ ................................ ................................ ............................... 5 S AMPLING L OCATION

................................ ................................ ................................ ................................ ................ 5 S AMPLING M ETHODOLOGY

................................ ................................ ................................ ................................ ....... 6 C HEMICAL A NALYSIS

................................ ................................ ................................ ................................ ................ 6 Q UALITY A SSURANCE M EASUREMENTS

................................ ................................ ................................ .................... 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 G ENERAL O BSERVATIONS

................................ ................................ ................................ ................................ ....... 17 L OADING C ALCULATIONS

................................ ................................ ................................ ................................ ........ 17 E STIMATED H ERBICIDES U SAGE ON C ORN C ROP

................................ ................................ ................................ ..... 22 E STIMATED P ESTICIDE U SAGE ON S OYBEAN C ROPS

................................ ................................ ................................ 24 R UNOFF C ALCULATIONS

................................ ................................ ................................ ................................ ......... 25 T REND A NALYSIS

................................ ................................ ................................ ................................ .................... 27 D RINKING W ATER C ONCERNS

................................ ................................ ................................ ................................ . 29 RECOMMENDATIONS AND CONCLUSIONS

................................ ................................ ................................ .. 30

LITERATURE CITED

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



### vi 

# LIST OF FIGURES

F IGURE 1 P ERCENTAGE OF P OUNDS OF S ELECTED P ESTICIDES A PPLIED TO C ORN AND S OYBEANS FOR THE S TATE OF I NDIANA

................................ ................................ ................................ ................................ ............................. 11 F IGURE 2 E XAMPLE OF THE T RAPEZOID R ULE

................................ ................................ ................................ ............. 18



# LIST OF TABLES

T ABLE 1 U PPER W ABASH R IVER B ASIN P ESTICIDES S AMPLING L OCATIONS AT USGS G AUGING S TATIONS

.................. 5 T ABLE 2 P RECISION M EASURED IN D UPLICATE S AMPLES

................................ ................................ .............................. 8 T ABLE 3 A CCURACY M EASURED IN S PIKED S AMPLES

................................ ................................ ................................ . 9 T ABLE 4 M OST C OMMONLY U SED P ESTICIDES AND A SSOCIATED I NFORMATION

................................ ......................... 10 T ABLE 5 L OADING IN P OUNDS PER D AY OF A TRAZINE FOR E LEVEN S ELECTED S AMPLE S ITES

................................ ..... 19 T ABLE 6 L OADING IN P OUNDS OF M ETOLACHLOR FOR E LEVEN S ELECTED S AMPLE S ITES

................................ ........... 20 T ABLE 7 L OADING IN P OUNDS OF A CETOCHLOR FOR E LEVEN S ELECTED S AMPLE S ITES

................................ .............. 21 T ABLE 8 E STIMATED H ERBICIDE U SAGE ON C ORN C ROPS PER C ROP Y EAR

................................ ................................ . 23 T ABLE 9 E STIMATED H ERBICIDE U SAGE ON S OYBEAN C ROPS PER C ROP Y EAR

................................ ........................... 24 T ABLE 10 P ERCENTAGE OF CONTRIBUTING TRIBUTARIES TO THE U PPER W ABASH R IVER B ASIN

................................ . 25 T ABLE 11 R AINFALL D ATA FOR E ACH S AMPLING S ITE

................................ ................................ ................................ 27 T ABLE 12 P UBLIC W ATER S UPPLY F ACILITIES U SING S URFACE W ATER F ROM THE U PPER W ABASH R IVER B ASIN

..... 29



# LIST OF APPENDICES

A PPENDIX 

### I M APS AND 

### S AMPLING 

### L OCATIONS 

### U PPER 

### W ABASH 

### R IVER 

### B ASIN 

### A PPENDIX 

### II P ARAMETER 

### L IST FOR 

### SAS5 M ODIFIED 

### M ETHOD 

### 525.2 A PPENDIX 

### III D ATA 

### Q UALITY ASSESSMENT LEVELS 

### A PPENDIX 

### IV H ERBICIDE 

### C ONCENTRATIONS AND 

### S TREAM 

### F LOWS 

### A PPENDIX 

### V D ESCRIPTIVE 

### S TATISTICS 

### A PPENDIX 

### VI G RAPHS OF THE 

### V ARIATION IN 

### P ESTICIDES 

### O VER 

### T IMEAn 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



### viiiAn 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



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



### 3 

## STUDY AREA
L OCATION 

### 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).



## G EOLOGY 

### 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).



## L AND 

## U SE 

### The Upper Wabash River Basin contains 20% (7,278 mi 2 

### ) of Indiana's total land area. The land area is primarily represented by cropland (92% at 6,695.2 mi 2 

### ), forests (4% at 293 mi 2 

### ), and urban and industrial areas (2.4% at 173 mi 2 

### ) (USGS 1994).



## F LOW 

## & D RAINAGE 

### The Wabash River drains 32,910 mi 2 

### of Indiana, Illinois, and Ohio, and flows into the Ohio River and ultimately into the Mississippi River. The Upper Wabash River Basin includes theAn 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 mi 2 

### of which 285 mi 2 

### 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).



## E ROSION 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
S AMPLING 

## L OCATION 

### 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 mi 2
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 samplingAn 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.



## S AMPLING 

## M ETHODOLOGY 

### 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.



## C HEMICAL 

## A NALYSIS 

### 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 

## Q UALITY 

## A SSURANCE 

## M EASUREMENTS



### 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 QAPPAn 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 QAPPAn 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 SURPASSAn 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 IIAn 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 includeAn 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 we re made assuming concentrations and flow rates remained constant throughout the day.



## G ENERAL 

## O BSERVATIONS


### 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.



## L OADING 

## C ALCULATIONS 

### To calculate loading, flow data were obtained at USGS gaging stations giving instantaneous flow velocity readings when grab samples were collected. Loading 1 

### was 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 ft 3 )(ug/L)(ft 3 /s)(3600s/1hr)(24hr/1d)(1g/10 6 ug)(.0353oz/1g)(1lb/16oz)=.0053945An 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 (l 1 

### + 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

1998Chemical Loadingpounds/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 TrapezoidAn 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 06/12/98 2 3 3 820.50 1355.37 249.53 3 3 3 3 3 2108.39 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 Pounds 4 1683 85 567 2775 510 1521 1569 4147 6094 231 20865
Estimated Runoff 5 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 & 9An 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 3 820.50 1265.01 467.87 3 3 3 3 3 2459.78 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 Pounds 4 1520 62 479 2331 1180 1724 1091 2388 2923 419 15194 Estimated % Runoff 5 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 & 9An 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 06/12/98 2 3 3 202.39 451.79 35.87 3 3 3 3 3 562.24 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 Pounds 4 336 21 98 567 113 1263 750 737 931 43 4995
Estimated Runoff 5 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 & 9An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001



### 22 

## E STIMATED 

## H ERBICIDES 

## U SAGE ON 

## C ORN 

## C ROP 

### 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 Corn 2 Pounds of

Atrazine applied 3 Pounds of

Acetochlor applied 4 Pounds of

Metolachlor applied 5 Pounds of

Metolachlor applied to bean and corn crops 6 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 9An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001



### 24 

## E STIMATED 

## P ESTICIDE 

## U SAGE ON 

## S OYBEAN 

## C ROPS 

### 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

S ite Drainage

Area in Basin sq. mi. 1 Acres

Planted to Soybeans 2 Pounds of

Glyphosate applied 3 Pounds of

Pendimethalin applied 4 Pounds of

Metolachlor applied 5 Pounds of 2,4-D

applied 6
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 acreAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001



### 25 

## R UNOFF 

## C ALCULATIONS 

### 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 mi 2 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. ThisAn 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



## T REND 

## A NALYSIS 

### 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 ofAn 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.



## D RINKING 

## W ATER 

## C ONCERNS


### 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 toconclude 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 A Source 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 IDUnited Water IndianaWarsaw Warsaw Center Lake 5243030
Logansport Municipal Utility-Water Logansport Eel River 5209006

Indiana American WaterKokomo Komoko Wildcat Creek 5234007An 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 Basin1 0 1 2 3 4 M i l e s N 

### L e g e n d

A g r i c u l t u r e C r o p l a n d A r e a : 6 3 , 2 7 7 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e T R

- 1 5 9

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n 

## M a p 1
- T i p p e c a n o e R i v e r a t O s w e g o M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1



# $ Z O s w e g o4 0 4 8 1 2 M i l e s



# $ Z

R o c h e s t e r W

a r s a w

O r a



### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 4 8 7 , 1 5 4 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e T R

- 7 9

N



## M a p 2
- T i p p e c a n o e R i v e r n e a r O r a M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n4 0 4 8 1 2 1 6 M i l e s 

# $ Z W a r s a w

R o c h e st e r

D e l p h i #



### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 1 , 0 7 6 , 0 0 9 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e T R

- 9

N



## M a p 3
- T i p p e c a n o e R i v e r n e a r D e l p h i M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z D e l p h i

2 0 2 4 6 M i l e s 

### L e g e n d

A g r i c u l t u r e C r o p l a n d A r e a : 1 7 0 , 8 1 4 a c r e s F o r e s t L a k e s & R e s e rv o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e D C

- 5

N



## M a p 4
- D e e r C r e e k n e a r D e l p h i M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $ Z L o ga n s p o r t

K

o k o m o M

a r i o n H

u n t i n g t o n W a r s a w

L a f a y e tt eSTATELINE 

## M a p 5
- W a b a s h R i v e r a t L a f a y e t t e M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u r v e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1



### A g r i c u l t u r e C r o p l a n d a r e a : 4 , 2 8 5 , 0 4 7 a c r e s F o r e s t L a k e s & R e s e rv o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a ry 

# $ Z S a m p l i n g S i t e W B

- 3 1 1 L e g e n d

4 0 4 8 1 2 M i l e s N

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z
L o g a n s p o r t H u n t i n g t o n

M a r i o nSTATELINE

4 0 4 8 1 2 1 6 M i l e s 

### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 2 , 2 4 6 , 2 9 8 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W B

- 3 5 4

N



## M a p 6
- W a b a s h R i v e r a t L o g a n s p o r t M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n4 0 4 8 1 2 1 6 M i l e s 

### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 1 , 5 9 8 , 6 5 7 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W B

- 3 7 0

N



## M a p 7
- W a b a s h R i v e r a t P e r u M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n 

# $ Z P e r u H u n t i n g t o n

M a ri o nSTATELINE

# $

Z H u n t i n g t o n

B l u f

f t o n W a b a s hSTATELINE



### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 1 , 0 5 8 , 5 7 3 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W B

- 3 8 7

N



## M a p 8
- W a b a s h R i v e r a t W a b a s h M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

3 0 3 6 9 1 2 M i l e s

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n2 0 2 4 6 8 1 0 M i l e s



# $ Z H u n t i n g t o n

B l u f f t o nSTATELINE



### L e g e n d



### A g r i c u l t u r e C r o p l a n d a r e a : 4 3 9 , 1 1 8 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s W a t e r s h e d b o u n d a r y R i v e r s & S t r e a m s 

# $ Z S a m p l i n g S i t e W B

- 4 0 9

N



## M a p 9
- W a b a s h R i v e r a t H u n t i n g t o n M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a nN

2 0 2 4 6 M i l e s 

### L e g e n d



### A g r i c u l t u r e
F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W B

- 4 4 5

C r o p l a n d a r e a : 2 7 6 , 5 7 5 a c r e s



## M a p 1 0
- W a b a s h R i v e r a t L i n n G r o v e M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n 

# $ ZSTATELINE 

### L i n n G r o v e2 0 2 4 6 8 M i l e s 

# $ Z

H u n t i n g t o n #



### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 1 5 5 , 7 6 3 a c r e s F o r e s t L a k e s & R e s e r v o i rs I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e L R

- 8

N



## M a p 1 1
- L i t t l e R i v e r n e a r H u n t i n g t o n M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n2 0 2 4 6 M i l e s



# $ Z N o r th M a n c h e s t e r C o l u m b i a C i t y



### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 2 2 9 , 3 3 9 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e E L L

- 5 3

N



## M a p 1 2
- E e l R i v e r a t N o r t h M a n c h e s t e r M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z N o r t h M a n c h e s t e r

L o g a n s po r t # 

### Co l u m b i a C i t y

4 0 4 8 1 2 M i l e s 

### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 4 7 2 , 8 0 8 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l W e t l a n d s O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e E L L

- 7

N



## M a p 1 3
- E e l R i v e r n e a r L o g a n s p o r t M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z

W a r r e n

P o r tl a n d



### L e g e n d



## A g r i c u l t u r e C r o p l a n d A r e a : 2 6 2 , 3 0 6 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e S

- 3 0

N

2 0 2 4 6 8 M i l e s 

## M a p 1 4
- S a l a m o n i e R i v e r n e a r W a r r e n M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z

P o r t l a n d La g r o

N

2 0 2 4 6 8 M i l e s 

### A g r i c u l t u r e C r o p l a n d A r e a : 3 3 7 , 6 8 2 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e S

- 3 L e g e n d 

## M a p 1 5
- S a l a m o n i e R i v e r a t D o r a

M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

ZSTATELINE

U n i o n C i t y

N



## A g r i c u l t u r e
F o r e s t L a k e s & R e s e rv o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a ry 

## $ Z S a m p l i n g S i t e M S

- 1 0 0

C r o p l a n d A r e a : 8 9 , 6 5 8 a c r e s L e g e n d

1 0 1 2 3 4 M i l e s 

## M a p 1 6
- M i s s i s s i n e w a R i v e r n e a r R i d g e v i l l e M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

### A g r i c u l t u r e C r o p l a n d A r e a : 4 1 4 , 8 2 0 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e M S

- 3 6 L e g e n d

2 0 2 4 6 8 1 0 M i l e s N 

## M a p 1 7
- M i s s i s s i n e w a R i v e r a t M a r i o n M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1



# $ Z

U n i o n C i t y H a r t f o r d C i t y M a r i o nSTATELINE

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z

U n i o n C i t y M a r i o n P e o r i aSTATELINE

N

4 0 4 8 1 2 M i l e s 

## A g r i c u l t u r e C r o p l a n d a r e a : 4 8 3 , 4 8 9 a c r e s F o r e s t L a k e s & R e s e rv o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a ry 

# $ Z S a m p l i n g S i t e M S

- 7 L e g e n d M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n

t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n 

## M a p 1 8
- M i s s i s s i n e w a R i v e r a t P e o r i a

# $

Z B u n k e r H i l l

2 0 2 4 M i l e s 

### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 9 9 , 3 7 7 a c r e s F o r e s t I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e P I P

- 1 1

N



## M a p 1 9
- P i p e C r e e k n e a r B u n k e r H i l l M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $ Z J e r o m e

W i n d f a l l C i t y #

2 0 2 4 M i l e s 

### L e g e n d



## A g r i c u l t u r e C r o p l a n d A r e a : 9 2 , 7 5 2 a c r e s F o r e s t I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a ry 

# $ Z S a m p l i n g S i t e W C

- 8 0

N



## M a p 2 0
- W i l d c a t C r e e k n e a r J e r o m e M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# $

Z K o k o m o

2 0 2 4 M i l e s 

### L e g e n d

A g r i c u l t u r e C r o p l a n d A r e a : 1 4 4 , 1 5 0 a c r e s F o r e s t L a k e s & R e s e rv o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W C

- 6 0

N



## M a p 2 1
- W i l d c a t C r e e k a t K o k o m o M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n2 0 2 4 6 8 1 0 M i l e s



# $ Z O w a s c o K o k o m o

L e g e n d

A g r i c u l t u r e C r o p l a n d A r e a : 2 3 4 , 3 2 1 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W C

- 1 5

N



## M a p 2 2
- W i l d c a t C r e e k a t O w a s c o M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n2 0 2 4 6 8 M i l e s



# $ Z L a f a y e t t e

F r a n k f o r t #



### L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 1 , 5 9 8 , 6 5 7 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W C S

- 4

N



## M a p 2 3
- S o u t h F o r k W i l d c a t C r e e k n e a r L a f a y e t t e M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n2 0 2 4 6 8 1 0 M i l e s



# $ Z L a f a y e t t e

F r a n k f o r t K o k o m o

L e g e n d



### A g r i c u l t u r e C r o p l a n d A r e a : 4 7 6 , 7 2 3 a c r e s F o r e s t L a k e s & R e s e r v o i r s I n d u s t r i a l & C o m m e r c i a l U r b a n & R e s i d e n t i a l O t h e r L a n d C o u n t y b o u n d a r i e s R i v e r s & S t r e a m s W a t e r s h e d b o u n d a r y 

# $ Z S a m p l i n g S i t e W C

- 5

N



## M a p 2 4
- W i l d c a t C r e e k n e a r L a f a y e t t e M c D u f f e e R

. 2 0 0 1

. A n A s s e s s m e n t o f P e s t i c i d e C o n c e n t r a t i o n s i n t h e U p p e r W a b a s h R i v e r B a s i n

. I n d i a n a D e p a r t m e n t o f E n v i r o n m e n t a l M a n a g e m e n t , O f f i c e o f W a t e r M a n a g e m e n t , A s s e s s m e n t B r a n c h , S u rv e y s S e c t i o n , I n d i a n a p o l i s , I n d i a n a

. I D E M 0 3 2 / 0 2 / 0 2 4 / 2 0 0 1

M a p R e f e r e n c e P r o j e c t i o n : U T M , Z o n e 1 6 P r i n t e d : M a r c h 8 , 1 9 9 9 P l a t e P r e p a r a t i o n : K a t h l e e n H a g a n

# APPENDIX II
Parameter List for SAS5 Modified EPA TEST Method 525.2An 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 - F g/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 0.1An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II- 2 CAS Number Compound Detection Limits - F g/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 1An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II- 3 CAS Number Compound Detection Limits - F g/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 0.1An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II- 4 CAS Number Compound Detection Limits - F g/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 0.1An Assessment of Pesticide Concentrations in the Upper Wabash River Basin IDEM 032/02/024/2001

II- 5 CAS Number Compound Detection Limits - F g/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 LevelsAn 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 Enforcementdata 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 FlowsAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2000

IV- ii 

# Appendix IV List of Tables

T ABLE IV-1 S TATION WB, W ABASH R IVER AT L INN G ROVE

................................ ................................ ................................ ... 1 T ABLE IV-2 S TATION WB-409, W ABASH R IVER AT H UNTINGTON

................................ ................................ ........................... 3 T ABLE IV-3 S TATION LR-8, L ITTLE R IVER NEAR H UNTINGTON

................................ ................................ ............................... 5 T ABLE IV-4 S TATION S-30, S ALAMONIE R IVER NEAR W ARREN

................................ ................................ ............................... 7 T ABLE IV-5 S TATION S-3, S ALAMONIE R IVER AT D ORA

................................ ................................ ................................ .......... 9 T ABLE IV-6 S TATION WB-387, W ABASH R IVER AT W ABASH

................................ ................................ ................................ 11 T ABLE IV-7 S TATION MS-100, M ISSISSINEWA R IVER NEAR R IDGEVILLE

................................ ................................ .............. 13 T ABLE IV-8 S TATION MS-36, M ISSISSINEWA R IVER AT M ARION

................................ ................................ ........................... 15 T ABLE IV-9 S TATION MS-7, M ISSISSINEWA R IVER AT P EORIA

................................ ................................ .............................. 17 T ABLE IV-10 S TATION WB-370, W ABASH R IVER AT P ERU

................................ ................................ ................................ .... 19 T ABLE IV-11 S TATION PIP-11, P IPE C REEK NEAR B UNKER H ILL

................................ ................................ ........................... 21 T ABLE IV-12 S TATION ELL-53, E EL R IVER AT N ORTH M ANCHESTER

................................ ................................ ................... 23 T ABLE IV-13 S TATION ELL-7, E EL R IVER NEAR L OGANSPORT

................................ ................................ .............................. 25 T ABLE IV-14 S TATION WB-354, W ABASH R IVER AT L OGANSPORT

................................ ................................ ....................... 27 T ABLE IV-15 S TATION DC-5, D EER C REEK NEAR D ELPHI

................................ ................................ ................................ ...... 29 T ABLE IV-16 S TATION TR-159, T IPPECANOE R IVER AT O SWEGO

................................ ................................ .......................... 31 T ABLE IV-17 S TATION TR-79, T IPPECANOE R IVER NEAR O RA

................................ ................................ .............................. 33 T ABLE IV-18 S TATION TR-9, T IPPECANOE R IVER NEAR D ELPHI

................................ ................................ ............................ 35 T ABLE IV-19 S TATION WC-80, W ILDCAT C REEK NEAR J EROME

................................ ................................ ........................... 37 T ABLE IV-20 S TATION WC-60, W ILDCAT C REEK AT K OKOMO

................................ ................................ .............................. 39 T ABLE IV-21 S TATION WC-15, W ILDCAT C REEK AT O WASCO

................................ ................................ .............................. 41 T ABLE IV-22 S TATION WCS-4, S OUTH F ORK W ILDCAT C REEK NEAR L AFAYETTE

................................ ............................... 43 T ABLE IV-23 S TATION WC-5, W ILDCAT C REEK NEAR L AFAYETTE

................................ ................................ ....................... 45 T ABLE IV-24 S TATION WB-311, W ABASH R IVER AT L AFAYETTE

................................ ................................ ......................... 47An 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV- 6An 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 Peori a 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV- 24An 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 NAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV- 26An 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV- 32An 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 NAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV- 34An 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 NAn 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 YAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn 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 NAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

IV- 44An 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 YAn 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 NAn 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 NAn 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 StatisticsAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001



### V- ii 

# Appendix V List of Tables

T ABLE V-1 S TATION WB, W ABASH R IVER AT L INN G ROVE

................................ ................................ .......................... 1 T ABLE V-2 S TATION WB-409, W ABASH R IVER AT H UNTINGTON

................................ ................................ ................. 2 T ABLE V-3 S TATION LR-8, L ITTLE R IVER NEAR H UNTINGTON

................................ ................................ ...................... 3 T ABLE V-4 S TATION S-30, S ALAMONIE R IVER NEAR W ARREN

................................ ................................ ...................... 4 T ABLE V-5 S TATION S-3, S ALAMONIE R IVER AT D ORA

................................ ................................ ................................ . 5 T ABLE V-6 S TATION WB-387, W ABASH R IVER AT W ABASH

................................ ................................ ........................ 6 T ABLE V-7 S TATION MS-100, M ISSISSINEWA R IVER NEAR R IDGEVILLE

................................ ................................ ........ 7 T ABLE V-8 S TATION MS-8, M ISSISSINEWA R IVER AT M ARION

................................ ................................ ..................... 8 T ABLE V-9 S TATION MS-7, M ISSISSINEWA R IVER AT P EORIA

................................ ................................ ....................... 9 T ABLE V-10 S TATION WB-370, W ABASH R IVER AT P ERU

................................ ................................ .......................... 10 T ABLE V-11 S TATION PIP-11, P IPE C REEK NEAR B UNKER H ILL

................................ ................................ .................. 11 T ABLE V-12 S TATION ELL-53, E EL R IVER AT N ORTH M ANCHESTER

................................ ................................ .......... 12 T ABLE V-13 S TATION ELL-7, E EL R IVER NEAR L OGANSPORT

................................ ................................ .................... 13 T ABLE V-14 S TATION WB-354, W ABASH R IVER AT L OGANSPORT

................................ ................................ ............. 14 T ABLE V-15 S TATION DC-5, D EER C REEK NEAR D ELPHI

................................ ................................ ............................ 15 T ABLE V-16 S TATION TR-159, T IPPECANOE R IVER AT O SWEGO

................................ ................................ ................. 16 T ABLE V-17 S TATION TR-79, T IPPECANOE R IVER NEAR O RA

................................ ................................ ..................... 17 T ABLE V-18 S TATION TR-9, T IPPECANOE R IVER NEAR D ELPHI

................................ ................................ ................... 18 T ABLE V-19 S TATION WC-80, W ILDCAT C REEK NEAR J EROME

................................ ................................ .................. 19 T ABLE V-20 S TATION WC-60, W ILDCAT C REEK AT K OKOMO

................................ ................................ .................... 20 T ABLE V-21 S TATION WC-15, W ILDCAT C REEK AT O WASCO

................................ ................................ ..................... 21 T ABLE V-22 S TATION WCS-.4, S OUTH F ORK W ILDCAT C REEK NEAR L AFAYETTE

................................ ...................... 22 T ABLE V-23 S TATION WC-5, W ILDCAT C REEK NEAR L AFAYETTE

................................ ................................ .............. 23 T ABLE V-24 S TATION WB-311 W ABASH R IVER AT L AFAYETTE

................................ ................................ ................. 24An 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 0.950An 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 0.714An 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 0.408An 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 0.476An 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 0.465An 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 2.098An 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 0.419An 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 0.356An 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 1.671An 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 2.417An 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 0.984An 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 0.981An 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 0.383An 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 2.083An 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 0.779An 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 0.071An 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 1.161An 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 0.518An 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 0.730An 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 0.760An 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 1.084An 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 0.472An 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 0.934An 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 0.622An Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001



# APPENDIX VI

GRAPHS OF THE VARIATION IN PESTICIDES OVER TIMEAn Assessment of Pesticides in the Upper Wabash River Basin IDEM 032/02/024/2001

VI- 1 

# Appendix VI
List of Graphs

G RAPH VI-1 W ABASH R IVER AT L INN G ROVE

................................ ................................ ................................ ............... 2 G RAPH VI-2 W ABASH R IVER AT H UNTINGTON

................................ ................................ ................................ .............. 2 G RAPH VI-3 L ITTLE R IVER NEAR H UNTINGTON

................................ ................................ ................................ ............. 3 G RAPH VI-4 S ALAMONIE R IVER NEAR W ARREN

................................ ................................ ................................ ............ 3 G RAPH VI-5 S ALAMONIE R IVER AT D ORA

................................ ................................ ................................ ..................... 4 G RAPH VI-6 W ABASH R IVER AT C ITY OF W ABASH

................................ ................................ ................................ ....... 4 G RAPH VI-7 M ISSISSINEWA R IVER NEAR R IDGEVILLE

................................ ................................ ................................ ... 5 G RAPH VI-8 M ISSISSINEWA R IVER AT M ARION

................................ ................................ ................................ ............. 5 G RAPH VI-9 M ISSISSINEWA R IVER AT P EORIA

................................ ................................ ................................ ............... 6 G RAPH VI-10 W ABASH R IVER AT P ERU

................................ ................................ ................................ ........................ 6 G RAPH VI-11 P IPE C REEK NEAR B UNKER H ILL

................................ ................................ ................................ ............. 7 G RAPH VI-12 E EL R IVER AT N ORTH M ANCHESTER

................................ ................................ ................................ ....... 7 G RAPH VI-13 E EL R IVER NEAR L OGANSPORT

................................ ................................ ................................ ............... 8 G RAPH VI-14 W ABASH R IVER AT L OGANSPORT

................................ ................................ ................................ ............ 8 G RAPH VI-15 D EER C REEK NEAR D ELPHI

................................ ................................ ................................ ...................... 9 G RAPH VI-16 T IPPECANOE R IVER AT O SWEGO

................................ ................................ ................................ .............. 9 G RAPH VI-17 T IPPECANOE R IVER NEAR O RA

................................ ................................ ................................ .............. 10 G RAPH VI-18 T IPPECANOE R IVER NEAR D ELPHI

................................ ................................ ................................ .......... 10 G RAPH VI-19 W ILDCAT C REEK NEAR J EROME

................................ ................................ ................................ ............ 11 G RAPH VI-20 W ILDCAT C REEK AT K OKOMO

................................ ................................ ................................ .............. 11 G RAPH VI-21 W ILDCAT C REEK AT O WASCO

................................ ................................ ................................ ............... 12 G RAPH VI-22 S OUTH F ORK W ILDCAT C REEK NEAR L AFAYETTE

................................ ................................ ................. 12 G RAPH VI-23 W ILDCAT C REEK NEAR L AFAYETTE

................................ ................................ ................................ ...... 13 G RAPH VI-24 W ABASH R IVER AT L AFAYETTE

................................ ................................ ................................ ............ 13An 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 DateConcentrationug/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

1998Concentrationug/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 DateConcentrationug/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 7/29An 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

1998Concentrationug/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

1998Concentrationug/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 7/29An 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 DateConcentrationug/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 DateConcentrationug/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 7/29An 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 DateConcentrationug/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 DateConcentrationug/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 7/29An 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 DateConcentrationug/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 DateConcentrationug/L

0 2 4 6 8 10 12 14 16 18

4/21 4/285/07 5/14 5/21 5/28 6/04

6/10 6/18

6/25 7/01 7/09

7/16 7/22 7/30An 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 DateConcentrationug/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 DateConcentrationug/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 7/30An 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 DateConcentrationug/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 DateConcentrationug/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 7/30An 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-1 6 Tippecanoe River at Oswego ACETOCHLOR ATRAZINE METOLACHLOR Variation in Pesticide Concentration Over Time Site DC-5

Sample DateConcentrationug/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 DateConcentrationug/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 7/30An 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 DateConcentrationug/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 DateConcentrationug/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 7/31An 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 DateConcentrationug/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 DateConcentrationug/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 7/31An 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 DateConcentrationug/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 DateConcentrationug/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 7/31An 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 DateConcentrationug/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 DateConcentrationug/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