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Incremental Recycled Water Program

Incremental Recycled Water Program. Santa Rosa Subregional Water Reclamation System Scoping Meeting July 31, 2002. Introduction. Purpose of Meeting Meeting agenda Introduction – Ed Brauner, Deputy City Manager CEQA Overview – Pat Collins, EIR Manager

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Incremental Recycled Water Program

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  1. Incremental Recycled Water Program Santa Rosa Subregional Water Reclamation System Scoping Meeting July 31, 2002

  2. Introduction • Purpose of Meeting • Meeting agenda • Introduction – Ed Brauner, Deputy City Manager • CEQA Overview – Pat Collins, EIR Manager • Description of Program – David Smith, Ph.D., Program Manager • Public comments • Purpose of Incremental Recycled Water Program

  3. CEQA Overview • City has decided to prepare a Program EIR • Not as detailed as a Project EIR • Allows for broad policy considerations, program-wide mitigation measures • Subsequent CEQA documents for specific projects • No preferred alternative – all alternatives will be evaluated equally • Issued a Notice of Preparation and Initial Study to agencies on July 16th

  4. Incremental Program Schedule 2001 2002 2003 2004 2005 Feasibility Eval. Public Involve. Tech Studies CEQA Design Permitting Construction/Ops Discharge Permit Re-Issuance

  5. Near-Term IRWP Public Involvement Opportunities • EIR Scoping • Comment period ends August 14 • Screening of Alternatives to be Studied in the EIR • Screening criteria discussed Aug 1st at BPU; Aug 6th at Council • Screening on Sep 19th at BPU; Sep 24th at Council • Draft EIR public review • Spring ‘03

  6. Purpose of Scoping • Inform agencies and the public about the project • Identify the range of alternatives • Identify specific issues to be analyzed in depth • Understand various points of view about the IRWP so the EIR can respond

  7. Public Comments • Written comments • Mailed or faxed to Santa Rosa City Manager’s Office • Hand in Comment Form tonight • Deadline is August 14, 2002 • Oral comments

  8. Program Overview • Why is the Program needed? • What are the possible solutions?

  9. Why the Incremental Recycled Water Program? • Geysers Recharge Project • General Plans as of 1994 (21.3 mgd) • Meets capacity needs through 2010 • 11 mgd (9 – 12 mgd) for entire project • IRWP • Meet capacity needs beyond 2010 • General plans changed to allow 25.9 mgd • California Toxics Rule imposed in 2000 • New limits on effluent quality • New solutions needed to comply

  10. California Toxics Rule – Constituents of Concern • Copper – pipe corrosion, difficult to remove • Lead – pipe corrosion • Cyanide – treatment byproduct • Aldrin - pesticide • alpha-BHC - pesticide • gamma-BHC (lindane – head lice control) • beta-Endosulfan - pesticide

  11. General Plans and Future Flow General Plan Flow Disposal/Reuse July ’02 + 4.6 mgd + ????? + 3.3 mgd + Geysers - Irrigation - Discharge Apr ’94 IrrigationDischarge Pre-’94 18 mgd Total=25.9 million gallons per day

  12. IRWP Purpose and Need • Three Primary Project Objectives • Provide treatment, reuse and disposal for planned population • Protect public health and natural resources, esp. River and tributaries • Economically feasible • Supporting Objectives • Maximize reuse • Potable supply benefits • Environmental protection • Maximize use of existing infrastructure • Manageable and reliable system

  13. How Much Water Needs to Handled? a BG/Yr = billion gallons per year

  14. Laguna Plant Expansion Indoor Water Conservation Inflow & Infiltration Reduction Urban Reuse Agricultural Reuse Industrial Reuse Geysers Expansion Additional Treatment & Reuse Discharge What are the Possible Solutions?

  15. Possible Location for IRWP Alternatives

  16. Alternatives - Laguna Plant Expansion • Increase treatment capacity from 21.3 to 25.9 mgd • Common to all reuse and disposal alternatives • All needed facilities expected to fit within existing site • Cost $40 - $158 million • Filtration requirements may change

  17. Alternatives – Indoor Water Conservation • Implementation beyond current programs • Santa Rosa – sustain existing program • Others cities – additional effort • Different program for each Subregional partner

  18. Alternatives – Inflow & Infiltration Reduction • Rehabilitation of sewers to reduce I&I volume • Annual I&I volume 0 - >3 BG/Yr • Priority areas • Crosstown area, such as Montgomery Village • Oldtown area, such as hospital, cemetery, Town and Country areas • Wide range of implementation level possible – up to $600 million for 70% reduction • Appropriate level defined by avoided costs

  19. Alternatives – Urban Reuse • Construct • up to 75-mile distribution network • 1 main pump station, up to 6 booster pumps stas. • Parcels greater than about 1 acre • Maximum project • Irrigation System Cost - $112 million, $57k/MG

  20. Alternatives - Storage • Needed for several alternatives • Surface • Santa Rosa Plain • East of Rohnert Park • North County • Subsurface • Santa Rosa Plain • Potential water quality benefits • Storage cost – up to $70 million

  21. Urban Reuse – Possible Surface Storage Area

  22. Urban Reuse – Possible Subsurface Storage Area • Favorable Area for Groundwater Injection and Extraction • 2 BG storage needed • 1 well field with 14 injection/ extraction wells stores 1 BG • Well field is approximately 3,000 feet wide and 9,000 feet long • Treatment benefit

  23. Alternatives – Agricultural Irrigation • East of Rohnert Park • 1.2 BG potential demand • Storage - 0.5 BG • Conveyance • North County • 5 subareas • 10.3 BG potential demand; 4.3 BG reliable supply • Storage - 1.8 BG • Conveyance • $19.2k/MG

  24. Alternatives – Industrial Reuse • Gravel processing • Typical facility “uses” 0.2 BG/yr • Cost $3k/MG or more depending on distance from Geysers Pipeline

  25. Alternatives – Geysers Pipeline Capacity Increase • Installed system • To AV: 48-inch, 40 mgd • AV to Geysers: 30-inch, 16 mgd • Expansion potential • 48-inch: from 40 to 81 mgd • Convey peak flows to indirect discharge, additional storage or reuse – CTR compliance • Add 2 PS between Plant and AV - $30 million • 30-inch: from 16 to 27 mgd • Increase steamfield injection

  26. Alternatives – Geysers Expansion • Current project = 11 mgd, 4 BG/yr • Expansion • From 11 to 21 mgd, 2.9 BG/yr • Pipeline: $0.3 capital, $2.3 million O&M • Steamfield: $32 milliona cap, $1.3 milliona O&M • From 11 to 27 mgd, 4.6 BG/Yr • Pipeline: $42 million capital, $7.7 million O&M • Steamfield: $62 milliona cap, $2.6 milliona O&M • Maximizes use of existing facilities a Calpine’s estimate

  27. Alternatives – Additional Treatment & Reuse • Up to 126 pollutants could be regulated • CTR compliance strategies: • Avoid direct discharge or • Improve effluent quality to comply • Effluent quality improvement strategies • Source control – not sufficient • Treatment – Reverse osmosis - up to $212 million • RO water suitable for • Discharge to the Russian River - $1 million • Groundwater injection – cost not yet estimated • Augmentation of Lake Sonoma - up to $60 million

  28. Alternatives – Indirect Discharge • Discharge to River via soil and groundwater • Percolation ponds • Infiltration basins (gravel pits) • Groundwater injection • Locations adjacent to River • Cost • Greater than $10 million for conveyance and site improvements • Land cost not yet estimated.

  29. Selected Example Combinations of Alternatives

  30. Scoping Comments • The most useful comments are: • Suggest alternatives to be included in the EIR • Identify specific issues to be analyzed in the EIR

  31. Public Comments • Written comments • Hand in Comment Form tonight • Mailed or faxed to Santa Rosa City Manager’s Office • Deadline is August 14, 2002 • Public comments

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