City of Peoria Clean Water Efforts. Governor s s Conference on the Management of the Illinois River October 4, 2007

Transcription

1 City of Peoria Clean Water Efforts Governor s s Conference on the Management of the Illinois River October 4,

2 What do you call dinner and a movie with an unemployed guy? An unfunded man-date! 2

3 Agenda Clean Water Act & NPDES Requirements Peoria Stormwater Program Peoria CSO Program River Monitoring Results Questions 3

4 Clean Water Act & Wet Weather Stormwater Control Requirements Medium and large cities must obtain a National Pollutant Discharge Elimination System (NPDES) permit, and Develop a stormwater management program designed to prevent harmful pollutants from being washed into waterways. Combined Sewer Overflow (CSO) Control CSOs are subject to NPDES permit requirements, including both technology-based and water-quality based requirements of the Clean Water Act Not subject to secondary treatment requirements that apply to wastewater treatment plants 4

5 Peoria Stormwater Program 5

6 Six Minimum Control Measures Public Education Public Involvement 6

7 Six Minimum Control Measures Illicit Discharge Construction Sites (continued) 7

8 Six Minimum Control Measures Post Construction Controls Good Housekeeping (continued) 8

9 Stormwater Program Recommendation Keep up with the paperwork! 9

10 Peoria Combined Sewer Overflow Program 10

11 NPDES CSO Permit Requirements Permit Issued June 1, 2006 Requires city to develop CSO Long-Term Control Plan by Dec. 1, 2008 First steps in developing plan: Water quality study of Illinois River during wet and dry weather conditions Study current conditions in collection system and GPSD wastewater treatment plant Public outreach and involvement 11

12 LTCP River Sampling Events Three baseline runs (no rainfall and no combined sewer overflows occurring) Three storm event runs to collect bacteria samples: Just before a combined sewer overflow During a combined sewer overflow Approximately 24 hours after the overflow ends 12

13 River Monitoring Locations East Peoria Levee Drainage Farm Creek Kickapoo Creek LEGEND SEWER OVERFLOW LOCATIONS RIVER MONITORING LOCATIONS 13

14 10,000 River Bacteria Concentrations- Dry Weather Fecal coliform E. coli Geometric Mean (cfu/100ml) 1, Fecal Standard: 200 cfu/100ml E. coli Standard: 126 mpn/100ml 1 May-Upstream of CSOs August- Upstream of CSOs August- Downstream CSOs Data Source: Peoria CSO LTCP sampling 14

15 Historical Fecal Coliform Measurements 1,000 Fecal coliform Geometric Mean (cfu/100 ml Fecal Coliform Geometric Mean Standard 200 CFU/100 ml Prior River Upstream of CSOs Farm Creek Kickapoo Creek River Downstream of CSOs Data Source: Illinois EPA Storet database 15

16 Fecal Coliform During Varying Conditions April- July 2007 Fecal coliform (cfu/100ml) Geomean 100,000 10,000 1, Before CSO Overflow/Dry Weather During CSO Overflow/Wet Weather 24 Hours After CSO Overflow 200 cfu/100ml Geometric Mean 1 Upstream of CSOs River Front Park Cass St. Upstream GPSD 1/4 mile Upstream of of I- I-474 Bridge 16

17 E. Coli During Varying Conditions April-July 2007 E. coli (mpn/100ml) Geomean 10,000 1, Before CSO Overflow/Dry Weather During CSO Overflow/Wet Weather 24 Hours After CSO Overflow 126 mpn/100ml Geometric Mean Standard 1 Upstream of CSOs River Front Park Cass St. Upstream GPSD 1/4 mile Upstream of of I- I-474 Bridge 17

18 June 2007 Storm Event Bacteria Contributions (mpn/100 ml) Stormwater bacteria concentrations unusually high; used more typical values from literature for loadings analysis on following slides. 18

19 Percent Fecal Coliform Contributions Fecal Coliform % Dry Weather August KICKAPOO 12% UPSTREAM OF CSOs 87% Upstream Upstream of CSOs of CSOs Stormwater Stormwater Peoria CSOs Peoria CSOs GPSD WWTP GPSD East WWTP Peoria WWTP East Farm Peoria Creek WWTP Kickapoo Farm Creek Creek Levy Drainage Kickapoo Creek Fecal Coliform % Wet Weather June KICKAPOO CREEK 56% FARM CREEK 8% UPSTREAM OF CSOs 30% PEORIA CSOS 5% Levy Levee Drainage 19

20 Percent E. Coli Contributions E. Coli % Dry Weather August E. Coli % Wet Weather June KICKAPOO CREEK 15% Upstream of CSOs Upstre Stormwater Stormw Peoria CSOs Peoria UPSTREAM OF CSOs 7% PEORIA CSOs 7% UPSTREAM OF CSOs 85% GPSD GPSD WWTP East P East Peoria WWTP Farm C Farm Creek Kickap KICKAPOO CREEK 72% FARM CREEK 12% Kickapoo Creek Levy D Levy Levee Drainage 20

21 Preliminary Results Summary: General Key Observations Elevated bacteria found in Illinois River during dry wea- ther and CSO storm events Tributaries and stormwater runoff carry high bacteria levels that are not related to CSOs Farm Creek Upstream sources continue to contribute bacteria to the river following a storm event During dry and wet weather, bacteria concentrations appeared to increase as you move downstream 21

22 Preliminary Results Summary: General Key Observations Cont d Peoria CSOs contributed approximately 5% of fecal coliform load and 7% of E. coli load during June storm event. % contribution from CSOs,, however, will vary from event to event Other sources account for majority of bacteria load in Illinois River In study area, eliminating Peoria CSOs will reduce bacteria load to river but not likely allow Illinois River to meet fecal coliform bacteria water quality standards 22

23 Questions? 23