The document discusses options for a long term combined sewer overflow control plan for the Maumee River and Swan Creek areas. It provides an overview of existing overflow frequencies and volumes. Several control alternatives are presented involving storage, treatment, and separation. Input is sought from the public on aspects of the alternatives like site selection, preferred technologies, acceptable overflow frequencies, and costs. A final alternative will be selected to reduce overflows and improve water quality while considering public input and costs.

1. Maumee River & Swan Creek Public Meeting #2 – Options Long Term Combined Sewer Overflow Control Plan Input March 9, 2005

2. Discussion Agenda Long Term Control Plan Recap Control Alternatives Common Elements Alternative Differentials Alternative Descriptions Opportunity for Input

3. CSO Control Planning The City must control CSO discharges according to the consent decree. Alternatives are being evaluated with respect to their feasibility, associated benefits and costs. Public input on alternatives considered is sought in tonight’s meeting.

4. Project Timeline The Long Term Control Plan Document is scheduled to be submitted to USEPA in July 2005. A review and modification period will follow the plan submittal. The work identified in the plan is to be completed by August 31, 2016.

5. Combined Sewer Area Overview

6. Combined Area – Maumee River & Swan Creek

7. Maumee/ Swan Creek Overflow Frequency CSO ID #/Year 4 16 5 28 6 14 7 30 8 4 9 25 23 13 24 5 25 15 26 17 27 23 28 1 29 <1 CSO ID #/Year 30 7 31 6 32 7 33 33 42 3 43* 5 45 2 46 3 47 11 48 <1 50 <1 68* 9 69* 4

8. Maumee/ Swan Creek Overflow Volume CSO ID Volume mg/yr 4 7 5 30 6 5 7 77 8 1 9 115 23 5 24 <1 25 5 26 5 27 10 28 <1 29 <1 CSO ID Volume mg/yr 30 <1 31 <1 32 2 33 38 42 <1 43* 53 45 2 46 1 47 12 48 <1 50 <1 68* 74 69* 19

9. Alternative Evaluation Alternative evaluation is based on reducing the frequency of overflow to 0 – 12 times a year. Total elimination of overflows would only occur in the most costly alternatives.

10. CSO Control Options Three basic control options were considered: Storage – holds excess flow until capacity is available. Treatment – cleans flow before it is discharged; disinfects and removes pollutants. Separation – provides new sanitary or storm sewers so that combined sewers are eliminated. Flow reduction / rerouting can enhance the above options.

11. Measurable Benefits of CSO Control Reduced frequency of CSO discharge. Reduced volume of discharge. Reduction in pollutants discharged. Better water quality in rivers.

12. Alternative Definition Alternatives have been identified for subareas of the Maumee River and Swan Creek. The following are common aspects of the defined alternatives.

13. Alternative Common Elements The number of overflow locations would be reduced from the existing 26 to a minimum of 18 and a maximum of 22.

14. Alternative Common Elements Remaining overflow would have less pollutant concentration.

15. Alternative Common Elements The tunnel systems would be improved to reduce overflow frequency and improve maintenance.

16. Alternative Common Elements Overall frequency of discharge would be reduced.

17. Alternative Common Elements The total volume of untreated combined sewer overflow would be reduced.

18. Alternative Common Elements Some partially separated areas would be completely separated.

19. Alternative Common Elements Outfalls would be consolidated.

20. Selection of Alternative Siting of Facilities East Toledo – three probable sites At I-280 interchange In International Park Near Miami and Oakdale West Toledo – two probable sites Near Jamie Farr Park City owned property near Maumee Avenue Potential alternative – storage tunnel

21. Alternative Options There are several different options that must be considered prior to determining the final alternatives. These options include: type of control method technology, level of control.

22. Alternative Options Control technology The degree of technology may vary.

23. Selection of Alternative Technology Selection Storage – basins or tunnels – holds excess flow until WWTP has capacity. No disinfection of discharge. Treatment – basin – would include disinfection. Facilities would actually discharge more frequently than storage. Separation can be used where existing pipe network could be converted, and where costs are comparable to other methods.

24. Alternative Options – Level of Control Total frequency of untreated discharge vs. cost of various alternatives.

25. Selection of Alternative Level of Control Selection The range of level of control is between 0 – 12 overflows/ year. Most approved plans have overflow frequencies of 2 – 6/ year. Water quality benefits are limited if frequency is reduced to 8/ year or less. Costs increase exponentially as level of control goes to zero discharges.

26. Selection of Alternative

27. Selection of Alternative Cost The range of cost is large. Every decision on level and type of control has a cost implication. There tend to be diminishing returns for larger facilities.

28. How you can help Provide input on the following alternative elements: Site Selection Technology Preferences Frequency of Overflow Cost Provide other comments and ask questions.