1. Wet Weather Improvements Project November 2, 2007 North Bay Watershed Association Board Meeting

2. rc1005cmsa.ppt 2 Presentation Outline t About CMSA t The Wet Weather Challenge t 12/31/05 Rain Event t Wet Weather Improvement Project t How to pay for the Project t What is Happening Now t Questions/Comments

3. About CMSA rc301nwea.ppt

4. rc1005cmsa.ppt 4 About CMSA - History t CMSA Joint Powers Agreement in 1979 – City of Larkspur – San Rafael Sanitation District – Ross Valley Sanitary District – Sanitary District #2 (Corte Madera) t CMSA constructed in early 1980s – Located in San Rafael (Andersen Drive) – Began operation in May 1985 – Replaced four small plants in Central Marin

5. rc1005cmsa.ppt 5 CMSA Service Area

6. rc1005cmsa.ppt 6 About CMSA - Governance t Appointed Board of Commissioners Al Boro, San Rafael council, 16 yearsAl Boro, San Rafael council, 16 years Paul Cohen, San Rafael council, 15 years (retired)Paul Cohen, San Rafael council, 15 years (retired) Bob Sinnott, Larkspur Fire Chief, 4 yearsBob Sinnott, Larkspur Fire Chief, 4 years John Dupar, Corte Madera council, 2 yearsJohn Dupar, Corte Madera council, 2 years Sue Brown, Ross Valley Sanitary, 1.5 yearsSue Brown, Ross Valley Sanitary, 1.5 years Pat Guasco, Ross Valley Sanitary, 1.5 yearsPat Guasco, Ross Valley Sanitary, 1.5 years

7. rc1005cmsa.ppt 7 About CMSA

8. rc1005cmsa.ppt 8 About CMSA - Services t Treatment & Disposal of Wastewater t Treatment & Disposal of Biosolids t Source control regulation – commercial/industrial t Public education – Marin County t Contract Services – Pump station O&M for Corte Madera – Source control/FOG management for LGVSD – FOG management with Ross Valley and San Rafael – Financial administration for San Rafael San - pending

9. rc1005cmsa.ppt 9 About CMSA - Operations t 40 staff members – Administrative, Finance, & Engineering – Operations, Maintenance, & Electrical – Laboratory, Environmental Compliance t Fiscal Year 2007/2008 Budget – $ 9 Million Operating – $ 18 Million Capital t Treat about 11 Million Gallons per Day (MGD) t Serve about 110,000 customers, incl San Quentin

10. The Wet Weather Challenge rc301nwea.ppt

11. rc1005cmsa.ppt 11 The Wet Weather Challenge t Average dry weather flow is 8 MGD t Wet Weather Flow has reached almost 115 MGD (14.5 x increase) –Wet Weather flows increased over 90% since 1985 –Caused by infiltration/inflow in collection systems –Increase has been 85+% at each member agency t Reason is increased pumping capacity by JPA members and deteriorating pipelines Local solution to minimize sewer overflowsLocal solution to minimize sewer overflows Does not consider regional impactsDoes not consider regional impacts

12. rc1005cmsa.ppt 12 Wet Weather Challenge 90 mgd Maximum Plant Treatment Capacity

13. rc1005cmsa.ppt 13 Flows vs Growth Member Agency Flows 74% growth over period Member Agency EDUs 9% growth over period

14. December 31st Storm rc301nwea.ppt

15. rc1005cmsa.ppt 15 December 31st storm t Peak Flow @ 115 MGD (historic maximum) t 100 MGD+ for 14 hours t Emergency contingency plan used Monitor storm front (Doppler radar), tides, & flowMonitor storm front (Doppler radar), tides, & flow Back flow into plant – try not to flood; thenBack flow into plant – try not to flood; then Balance filling pond with backing up flow; thenBalance filling pond with backing up flow; then Contain spilling to on-site storm drain ditches; whileContain spilling to on-site storm drain ditches; while Protecting process equipment (electrical) & biomassProtecting process equipment (electrical) & biomass Worst case – flood plant and spill off-siteWorst case – flood plant and spill off-site

16. rc1005cmsa.ppt 16 Aerial Photo N

17. rc1005cmsa.ppt 17 Blending Channel Spilling

18. rc1005cmsa.ppt 18 Secondary Clarifier Flooding

19. rc1005cmsa.ppt 19 Overflowing at Contact Tank Deck

20. rc1005cmsa.ppt 20 Spilling out of the Contact Tanks

21. rc1005cmsa.ppt 21 Flooding at the Chlorine Bldg

22. rc1005cmsa.ppt 22 Flow Out of the Pond

23. Wet Weather Improvement Project (WWIP) rc301nwea.ppt

24. rc1005cmsa.ppt 24 WWIP – Capacity Study t Capacity Management Study Treatment and hydraulic analysis for each process at CMSATreatment and hydraulic analysis for each process at CMSA Hydrologic analysis – relationship of rain to flowHydrologic analysis – relationship of rain to flow Development of feasible & viable solutionsDevelopment of feasible & viable solutions t Workshops with JPA managers t Goals presented to Commission in June 2004

25. rc1005cmsa.ppt 25 WWIP - Goals Accommodate a 5-Year Design Event Restore Existing Storage Pond Capacity Prevent overflows and meet treatment requirements Accommodate a 125 mgd Collection System Hydraulic Limit

26. rc1005cmsa.ppt 26 WWIP - Wet Weather Flow Improvement t Increase treatment capacity Polymer facility, 2 primary clarifiers, secondary improvements, 2 chlorine contact tanksPolymer facility, 2 primary clarifiers, secondary improvements, 2 chlorine contact tanks t Increase hydraulic capacity 155 MGD effluent pump station & standby power155 MGD effluent pump station & standby power t Outfall strengthening improvements t Expand storage pond to 7 million gallons

27. rc1005cmsa.ppt 27 Layout of Key WWIP Facilities Legend New WWIP Facilities New O&M Improvements Existing Facilities

28. rc1005cmsa.ppt 28 Master Project Schedule Predesign Final Design Bid/Award Permit Renewal CEQA Activity (1) (1) Schedule represents improvements for 125 mgd collection system hydraulic limit for 5 year design flow event. Notes: Finance/Rate Planning Study 20052006200720082009 Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4 Debt Issuance 50% 90% 100% Q1Q2 2010 Submitted Report of Waste Discharge Construction

29. How to pay for the Project rc301nwea.ppt

30. rc1005cmsa.ppt 30 WWIP - Project Costs Element No. Required Elements Construction Cost (1) 1 Capacity Management Study $221,000 2Pre-Design$590,000 3CEQA$52,000 4 Final Design $4,060,000 5 Engineering Services During Construction $2,113,000 6 Construction Management (3 rd Party & Staff) $4,200,000 7 WWIP Construction $35,500,000 8 Storage Pond & Outfall Improvements $2,300,000 9 Change Order Allowance $4,200,000 Total$53,236,000 (1) Based on ENR of 9460 at mid-point of construction (December 2008). (2) Pond provided for plant operational flexibility.

31. rc1005cmsa.ppt 31 How to Pay for the WWIP t Board forms a finance committee to consider pay-as-you-go or debt issuance scenarios t Committee recommends and Board approves issuing tax-exempt revenue bonds t Debt issuance process through summer of 2006 t $69 million in bonds sold in October 06 at 4.33% t Proceeds fund the WWIP and CIP to FY11/12

32. What is Happening Now? rc301nwea.ppt

33. rc1005cmsa.ppt 33 What is Happening at CMSA t Effluent Storage Pond enlargement will be completed in late November 2007 t Outfall Improvements @ 50% design t WWIP – contract awarded in September Notice-to-Proceed issued in OctoberNotice-to-Proceed issued in October Preconstruction conference and Partnering Workshop heldPreconstruction conference and Partnering Workshop held Construction has focused on staging area development, clearing & grubbing, installing fencing.Construction has focused on staging area development, clearing & grubbing, installing fencing.

34. rc1005cmsa.ppt 34 What is Happening at JPA Agencies t San Rafael San has raised its raised from $26/month to $54/month over 5 years to support 80 yr rehabilitation program t Corte Madera raised rates from $15/month to $42/month to support a 40 yr replacement program t Ross Valley Sanitary District has completed system wide studies and developed a 10-yr CIP. Their rate will likely be raised next year t Each district has accelerated their pipeline replacement activities.

35. rc1005cmsa.ppt 35 Effluent Pond Project

36. rc1005cmsa.ppt 36 Effluent Storage Pond Project

37. rc1005cmsa.ppt 37 Rendering of CCTs and Pump Station

38. rc1005cmsa.ppt 38 Rendering of New Clarifiers

39. Questions/ Comments rc301nwea.ppt