HomeMy WebLinkAbout2013/07/16 Metro Wastewater PresentationRegional Water Reuse Plan As a Strategy for Permanent Acceptance of Point Loma Wastewater Treatment Plant at Advanced Primary July 2013????
Metro Wastewater Joint Powers Authority • Twelve Member Agencies • 35% of Flow & Cost of SD Metro WW System County of San Diego City of Chula Vista City of Coronado City of Del Mar City
of El Cajon City of Imperial Beach City of La Mesa City of National City City of Poway Lemon Grove Sanitation District Otay Water District Padre Dam Municipal Water District
Challenges • Create a New, Local, Diversified Water Supply • Avoid Upgrade of Point Loma Wastewater Treatment Plant (PLWTP) to Secondary Saving Billions of Dollars $3.5 Billion
Solution • Divert Substantial Wastewater Flows from PLWTP through Implementation of a Regional Water Reuse Program Focused on Potable Reuse • Permit SMALLER Advanced Primary PLWTP that
Reduces Wastewater Flows to the Ocean
Regional Water Capital: $3.6B Annual Op: $1.4B Desal Cap & Op Carlsbad: $1.0B Capital ? Operating Pendleton: $1.9B Capital ? Operating Rosarita Beach: $500M Capital ? Operating Impact
of Local Supply Projects on MWD and SDCWA Rates Local Water CIP & Op Costs State Regulatory Enhancement Regional Sewer Capital: $90.1M Annual Op: $216.3M IPR: $1.0B Capital (not including
debt) ? Operating PL Upgrade: $3.5B Capital (includes financing costs) + $40 m/yr Operating Local Sewer CIP & Op Costs Future Needs? Future Needs? Future Needs? Future Needs? Areas not
currently included in rates Cost estimates are currently wide-ranging and subject to change State Water Delta Fix Bonds: $50B-$60B Construction: +? Operating: +?
San Diego Metropolitan Wastewater System • PLWTP: 240 MGD • North City Water Reclamation Plant (NCWRP): 30 MGD • South Bay Water Reclamation Plant (SBWRP): 15 MGD • Metro Biosolids Center
(MBC) • Point Loma Ocean Outfall (PLOO) • South Bay Ocean Outfall (SBOO) • Metro Wastewater Pump Stations/Pipelines
Wastewater Treatment Levels • Primary o 65% Solids Removal • Advanced Primary (PLWTP) o 87/88% Solids Removal • Secondary o 90% Solids Removal • Tertiary (NCWRP, SBWRP)
PLWTP Permit Background • Clean Water Act (1972) – Wastewater Treatment Plants Require Permits – Secondary Treatment Required – Act Amended to allow Modified Permits (Waivers) at Less
Than Secondary
PLWTP Permit Background (cont’d) • Wastewater Treatment Plants MUST get a Permit or Modified Permit every 5 years • Environmental Protection Agency • Regional Water Quality Control Board
• State Water Resources Control Board • California Coastal Commission
PLWTP Permit Background (cont’d) • City of San Diego • Submitted Modified Permit Application • Later withdrew Modified Permit Application • Timeframe for Modified Permits Closed • EPA
sued the City
PLWTP Permit Background (cont’d) • Ocean Pollution Reduction Act (OPRA) • Then-Congressman Filner Sponsored • Allowed San Diego to apply for a Waiver • San Diego agreed to build 45 MGD
of Water Reclamation Capacity (NCWRP, SBWRP)
PLWTP Permit Background (cont’d) • Since then: • San Diego applies for a Modified Permit (Waiver) every 5 years • Environmental Community Support for San Diego Waivers Required: – Refined
estimate of cost to convert 240 MGD to Secondary » In 2006, $1Billion capital w/o financing or operating costs – Comprehensive external scientific review AND upgrade of Ocean Monitoring
Program – Recycled Water Study and Water Reuse Demonstration Project • Current Permit EXPIRES July 31, 2015
San Diego Recycled Water Study • Outlines Alternatives to Divert Almost 100 MGD from PLWTP • Includes 83 MGD of Indirect Potable Reuse Facilities near Harbor Drive, NCWRP and SBWRP •
Discharges water to San Vicente and Otay Water Reservoirs • Reduces planned wastewater flows to PLWTP from 240 MGD to 143 MGD
San Diego Water Reuse Demonstration Project • Proved ability to repurify wastewater at operational flow rates • Quality of water similar to distilled water— Far Superior to Current Raw
Water Sources
Recommendations • Create Long Range (˜20 year) Regional Water Reuse Program focused on potable water reuse that: – Provides new, local, sustainable water supply (˜83 mgd) – Offloads
PLWTP to ˜143 MGD • Obtain Legislation to permit SMALLER PLWTP (˜143 MGD) at Advanced Primary that: – Avoids billions of dollars in capital, financing, energy and operating costs – Continues
to protect the ocean environment