Illicit Discharge Detection and Elimination Process and Results Robert Swanson DuPage County, Stormwater Management Division

Presentation Topics Overview of DuPage County’s IDDE Monitoring Program Overview of DuPage County’s IDDE Monitoring Program When to Sample When to Sample Where to Sample Where to Sample How to Sample How to Sample 2008 Monitoring Results 2008 Monitoring Results Future Monitoring Efforts Future Monitoring Efforts

When to Sample No earlier than 72 hours after rain event No earlier than 72 hours after rain event Rain event = greater than 0.1 inch of rain Rain event = greater than 0.1 inch of rain Check USGS precipitation gage closest to monitoring sites Check USGS precipitation gage closest to monitoring sites Nine gage stations with real-time precipitation data Nine gage stations with real-time precipitation data

Precipitation Stations StationLocation Kress Creek, West Chicago West Branch DuPage River, Warrenville Salt Creek, Elmhurst O’Hare Airport, Chicago Blackwell Forest Preserve, Warrenville Salt Creek at 22 nd St., Oak Brook Carol Stream WWTF, Carol Stream Wheaton Water Department, Wheaton Sawmill Creek, Lemont

Primary Precipitation Stations

Secondary Precipitation Stations

Where to Sample ILR40 authorizes storm water discharges to any surface water of the State ILR40 authorizes storm water discharges to any surface water of the State IEPA utilizes the US Geological Survey’s National Hydrography Dataset (NHD 1:100,000 scale) for the §303(d) impaired waters list IEPA utilizes the US Geological Survey’s National Hydrography Dataset (NHD 1:100,000 scale) for the §303(d) impaired waters list NHD identifies approximately rivermiles within DuPage County’s borders NHD identifies approximately rivermiles within DuPage County’s borders

Where to Sample

2008 Locations West Branch DuPage River West Branch DuPage River 27.3 Total Miles (21.53 Monitored) 27.3 Total Miles (21.53 Monitored) 111 Outfalls Mapped Prior to Outfalls Mapped Prior to 2008 Of 111 Outfalls, 63 Located (57%) Of 111 Outfalls, 63 Located (57%) 80 New Outfalls Added 80 New Outfalls Added Tronox Thorium Removal Project Tronox Thorium Removal Project 5.77 miles between Mack Road and Ogden Avenue 5.77 miles between Mack Road and Ogden Avenue

2008 Locations East Branch DuPage River East Branch DuPage River 18.5 Total Miles 18.5 Total Miles 198 Outfalls Mapped Prior to Outfalls Mapped Prior to 2008 Of 198 Outfalls, 117 Located (59%) Of 198 Outfalls, 117 Located (59%) 46 New Outfalls Added 46 New Outfalls Added

How to Sample Testing for six parameters: Testing for six parameters: pH (Standard Units) pH (Standard Units) Temperature (°C) Temperature (°C) Specific Conductance (uS/cm) Specific Conductance (uS/cm) Fluoride (mg/L) Fluoride (mg/L) Ammonia (mg/L) Ammonia (mg/L) Detergents / Anionic Surfactants (mg/L) Detergents / Anionic Surfactants (mg/L)

pH Paper test strips Paper test strips 0 – 14 SU range 0 – 14 SU range Fast and simple to use Fast and simple to use

Temperature and Specific Conductance YSI Model 30 Measures temperature and temperature-compensated conductivity (specific conductance) Ranges: -5 to 95 °C 0 to 4,999 uS/cm

Fluoride and Ammonia Fluoride: Hach Method 8029 Range; 0 to 2.00 mg/L EDL = 0.05 mg/L Ammonia: Hach Method Range; 0 to 2.50 mg/L EDL = 0.08 mg/L

Fluoride and Ammonia Both tests require a Hach DR/800 series portable colorimeter Both tests require a Hach DR/800 series portable colorimeter DR/890 can perform additional analysis: DR/890 can perform additional analysis: Chemical Oxygen Demand (COD) Chemical Oxygen Demand (COD) Chlorine, Total Chlorine, Total Hardness Hardness Nitrogen, Total Nitrogen, Total Phosphorus Phosphorus Some metals; Aluminum, Copper, Iron, Manganese, and Nickel Some metals; Aluminum, Copper, Iron, Manganese, and Nickel

Detergents / Anionic Surfactants Analyzes for the negatively charged key ingredient in detergents Analyzes for the negatively charged key ingredient in detergents CHEMetrics visual system test CHEMetrics visual system test Utilizes a color wheel comparator for concentration determination Utilizes a color wheel comparator for concentration determination Range; 0 to 3 mg/L Range; 0 to 3 mg/L EDL = mg/L EDL = mg/L

2008 Results West Branch DuPage River West Branch DuPage River Of 143 Located Outfalls, 17 Discharging (12%) Of 143 Located Outfalls, 17 Discharging (12%) East Branch DuPage River East Branch DuPage River Of 163 Located Outfalls, 10 Discharging (6%) Of 163 Located Outfalls, 10 Discharging (6%)

2008 Results pH (SU) Temperature (ºC) Specific Conductance (uS/cm) Fluoride (mg/L) Ammonia (mg/L) Surfactants (mg/L) Mean Value Median Value Maximum Value Minimum Value

2009 Locations Mainstem Salt Creek (17.4 miles) Mainstem Salt Creek (17.4 miles) Waterways located in Wayne, Bloomingdale, and Addison Townships (51.7 miles) Waterways located in Wayne, Bloomingdale, and Addison Townships (51.7 miles) Includes Brewster Creek (FR), Norton Creek (FR), Tributary #1 (WB), Tributary #2 (WB), Klein Creek (WB), Armitage Creek (EB), Spring Brook Creek (SC), Westwood Creek (SC), Addison Creek (DP), and Bensenville Ditch (DP) Includes Brewster Creek (FR), Norton Creek (FR), Tributary #1 (WB), Tributary #2 (WB), Klein Creek (WB), Armitage Creek (EB), Spring Brook Creek (SC), Westwood Creek (SC), Addison Creek (DP), and Bensenville Ditch (DP)

2010 Locations Waterways located in Winfield, Milton, and York Townships (52.6 miles) Waterways located in Winfield, Milton, and York Townships (52.6 miles) Includes Kress Creek (WB), Spring Brook #1 (WB), Winfield Creek (WB), Glen Crest Creek (EB), Tributary #2 (EB), Willoway Brook (EB), Oak Brook Tributary (SC), and Sugar Creek (SC) Includes Kress Creek (WB), Spring Brook #1 (WB), Winfield Creek (WB), Glen Crest Creek (EB), Tributary #2 (EB), Willoway Brook (EB), Oak Brook Tributary (SC), and Sugar Creek (SC)

2011 Locations Waterways located in Naperville, Lisle, and Downers Grove (North) Townships (61.8 miles) Waterways located in Naperville, Lisle, and Downers Grove (North) Townships (61.8 miles) Includes Waubansee Creek (FR), Spring Brook #2 (DR), Ferry Creek (WB), Cress Creek (WB), Tributary #6 (WB), Tributary #7 (WB), Prentiss Creek (EB), and St. Joseph Creek (EB) Includes Waubansee Creek (FR), Spring Brook #2 (DR), Ferry Creek (WB), Cress Creek (WB), Tributary #6 (WB), Tributary #7 (WB), Prentiss Creek (EB), and St. Joseph Creek (EB)

2012 Locations Waterways located in Downers Grove (South) Township (23.2 miles) Waterways located in Downers Grove (South) Township (23.2 miles) Includes Sawmill Creek (SW) and Wards Creek (SW) Includes Sawmill Creek (SW) and Wards Creek (SW) Fifth year of the permit (2013) allows for catch- up on any unmonitored streams, as well as overall program assessment Fifth year of the permit (2013) allows for catch- up on any unmonitored streams, as well as overall program assessment

Future Monitoring Efforts

Questions? Robert Swanson Water Quality Specialist Stormwater Management Division DuPage County, IL