1553.79 SAUK Illinois Division of Public Water Supplies c.3 Environmental 2200 Churchill Road Protection Agency Springfield, Illinois 62706 Groundwater Quality Protection Program SAUK FACILITY NUMBER 0312790 WELL SITE SURVEY REPORT Division of Public Water Supplies IEPA/PWS/93-072 GROUNDWATER QUALITY PROTECTION PROGRAM: SAUK FACILITY NUMBER 0312790 WELL SITE SURVEY REPORT Prepared by: Division of Public Water Supplies Published by: Illinois Environmental Protection Agency Springfield, Illinois August 1993 ILLINOIS STATE LIBRARY Printed on Recycled Paper 9 00669 664 5 JZ £-ST3,'7? <5 o /> c • J5 TABLE OF CONTENTS I. Introduction II. Facility Description and Geologic Profile of Well Sites III. Groundwater Sampling and Monitoring History IV. Well Site Survey Methods and Procedures V. Summary VI. Recommendations VII. Technical Appendices A. Topographic Map of Sauk Well Site Locations B. Aerial Photographic Map 1) Sauk Well No. 1 (IEPA #20600) Summary Description & Unit Inventory 2) Sauk Well No. 2 (IEPA #20601) Summary Description & Unit Inventory C. Aerial Photographic Map 1) Sauk Well No. 3 (IEPA #20602) Summary Description & Unit Inventory D. Facility Wells Report E. Detailed Sampling/Monitoring Results F. Well Logs G. Hazard Review Worksheets Digitized by the Internet Archive in 2019 with funding from University of Illinois Urbana-Champaign https://archive.org/details/saukfacilitynumbOOunse INTRODUCTION This report has been prepared by the Agency pursuant to Section 17.1 of the Illinois Environmental Protection Act (ACT). The report summarizes information about your facility, and samples collected and analyzed from your well(s). The well site survey provides an inventory of the area around your well(s) to help increase your awareness of potential hazards to groundwater utilized by your facility. This information and technical data will assist you in developing and implementing local groundwater protection measures authorized by the Act. FACILITY DESCRIPTION AND GEOLOGIC PROFILE OF WELL SITES Sauk has three public water supply wells. The facility produces 987,000 gallons per day on average to an estimated population of 9,926. See Table I for a description of each well. The wells utilize a deep bedrock aquifer overlain by relatively impermeable silty or clayey till at least 50 ft. thick, no evidence of interbedded sand and gravel. Permeability is a measure of the ability of a soil or sediment to transmit fluids. A detailed description and geologic profile is found in the Facility Wells Report (Appendix D). TABLE I Min. Max. Cap. Spec. Treatment Aquifer Well Well Set- Set- (gpm) Cap. Depth Log Back Back (MGD) (gpm/ (ft) Avail (ft.) (ft.) Status ft) Well No. 1 200 A 659 N/A Cl, Shallow 470 Yes (20600) 0.950 Phos. Bedrock Well No. 2 200 A 999 N/A FI, Cl, Shallow 480 Yes (20601) 1.440 Phos. Bedrock Well No. 3 200 A 999 N/A FI, Cl, Shallow 451 Yes (20602) 1.440 Phos. Bedrock A = Active, I - Inactive, SB = Standby. GROUNDWATER SAMPLING AND MONITORING HISTORY The public water supply wells Nos. 1 and 3 at Sauk were sampled as part of the Statewide Groundwater Monitoring Network on April 29, 1987 and well No. 2 was sampled November 15, 1985. The well samples were analyzed for volatile organic and aromatic chemicals (Y0C/Y0A) and inorganic chemicals (IOC). The VOC/VOA analyses performed detected no quantifiable levels of organic chemicals from the wells. The IOC analyses performed has found the water in the wells to have an elevated level of iron, which is not uncommon for similar wells in the area. WELL SITE SURVEY METHODS AND PROCEDURES The detailed well site survey consists of an aerial photographic map and inventory sheets, (Appendix B), that relate information about potential sources, routes, and possible problem sites to your water supply wells. The location of potential sources, routes, possible problem sites, water wells minimum setback zones and the 1 ,500 foot survey area are all displayed on the aerial photographic map. The first page of each survey consists of a summary description and geologic profile for each well. The second and following pages of the survey inventory units within and bordering a 1 ,500 foot radius of the wellhead. A unit is defined as "any device, mechanism, equipment, or area (exclusive of land utilized only for agricultural production)". The Agency 5-digit well number is associated with unit or map code, and then classified. The classification codes relate to definitions of potential contamination sources and routes as defined in the Illinois Groundwater Protection Act (see Groundwater Primer pages 18-19). The distance and direction of the unit from the wellhead is also indicated. SURVEY RESULTS AND FINDINGS The well site survey of Sauk was conducted on July 7, 1992 by Greg White, Environmental Protection Specialist from the Agency's Rockford Regional Office. The following describes the results and findings for Sauk. Sauk Well No. 1 (IEPA #20600) - The survey area is urban consisting entirely of moderate density residential housing. The well is located south of Sauk Trail. There is one potential secondary source located within the minimum setback zone (200 feet). This site is the Village of Sauk underground storage tank (Map code 1) located 150 feet north of the well. There are no possible problem sites located outside the minimum setback zone but within the survey area (1500 feet). Sauk Well No. 2 (IEPA #20601 ) - The survey area is urban consisting entirely of moderate density residential housing. The well is located south of Sauk Trail, next to well No. 1. There is one potential secondary source located within the minimum setback zone (200 feet). This site is the Village of Sauk underground storage tank (Map code 1) located 150 feet north of the well. There are no possible problem sites located outside the minimum setback zone but within the survey area (1500 feet). Sauk Well No. 3 (IEPA #20602) - The survey area is urban consisting partly of commercial businesses and partly of open spaces. The well is located south of Route 30 between Route 394 and Torrence Avenue. There are no visible potential sources, routes, or possible problems located within the minimum setback zone (200 feet). Two possible problem sites are located outside the minimum setback zone but within the survey area (1500 feet). These sites are Carolina Trucking (Map code 1) located 1000 feet northwest of the well, and Roadway Trucking (Map code 2) located 400 feet south of the well. SUMMARY The well site survey conducted located one potential secondary source within the minimum setback zone and a couple possible problem sites outside the minimum setback zone, but within the survey area of each well. The sampling and monitoring to date has detected no contamination in the groundwater utilized by the facility utilized by the facility. The Illinois Environmental Protection Act provides minimum protection zones for your wells. These minimum protection zones are regulated by the IEPA. The Act also authorizes county and municipal officials the opportunity to provide maximum protection up to 1,000 feet. The responsibility for the control would then be assumed by local officials through adoption of a maximum setback zone ordinance. Maximum setback zones prohibit the siting of new potential primary sources of groundwater contamination. A maximum setback up to 1,000 feet could expand the regulatory coverage of certain existing and new activities. These controls could be implemented upon the adoption of proposed regulations by the Illinois Pollution Control Board. RECOMMENDATIONS The Agency strongly urges Sauk to consider establishing a maximum setback zone for its wells. The Agency has prepared a "Maximum Setback Zone Workbook" which provides detailed case studies of how to establish maximum setback zones. In addition, technical assistance is available from the Agency and the Illinois State Water Survey.