Transcript MPWMD TOWN HALL MEETING--AUG 25, 2005-
MRWPCA Proposed Groundwater Replenishment Project
By Keith Israel, General Manager Monterey Regional Water Pollution Control Agency August 25, 2005
Overview of Presentation Topics
General MRWPCA Background
Recycled Water Availability
Orange County Groundwater Recharge Experience
Proposed MRWPCA Project
MARINA
LEGEND
Service Area
MOSS LANDING CASTROVILLE PACIFIC GROVE MARINA MONTEREY SAND CITY SEASIDE DEL REY OAKS FORT ORD MILITARY RESERVATION BORONDA SALINAS
Recycled Water Availability 13,500 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 Recycled Water for Crops Available: 10,000 AFY Winter Secondary Wastewater to Bay
Water Factory 21: A 15 mgd advanced waste water reclamation facility, supplied fresh water for sea water barrier Since 1975 produced over 100,000 ac-ft of water that blends with existing groundwater Over 25 years of operating experience Injected water is withdrawn by municipal wells as drinking water Injected water meets all drinking water standards 1/3 of product water treated by Reverse Osmosis
The New 75 MGD Groundwater Replenishment System (GWRS) was conceived to provide a new, reliable water supply Concept: Secondary Treated discharge to the Ocean would be treated to Drinking Water Standards and recharged into the OC Groundwater Basin
OCSD Secondary
GWR System Advanced Water Treatment Flow Diagram
Ultraviolet Microfiltration Reverse Osmosis +Peroxide (MF) (RO) Purified Effluent Water Backwash OCSD Plant 1 Brine OCSD Outfall
What Would a MRWPCA Project Look Like?
Treatment Facilities
Distribution Pipeline
Recharge/Injection
PROPOSED GROUNDWATER REPLENISHMENT PROJECT Seaside Groundwater Basin
Water Purification Plant
Use Secondary or Tertiary Effluent
Treatment would include: Micro Filtration (if needed) Reverse Osmosis Ultraviolet Disinfection/Oxidation
Facilities Likely at RTP
Brine Discharged to Outfall
GWR System Treatment Scheme – A multiple barrier concept producing purified water MRWPCA Secondary Effluent SVRP Filtration Plant Reverse Osmosis Ultraviolet Light with H 2 O 2 Recharge Basins Injection Wells Backwash to Secondary Plant Brine MRWPCA Outfall Highest Quality Available
Distribution System
New Pump Station and Pipeline
Alignment through Fort Ord along General Jim Moore Blvd
Pipeline could be dual purpose:
Carry recycled water during summer irrigation season and purified water in winter
Recharge / Injection
Percolate through soil for recharge of aquifer or
Directly inject into the appropriate aquifer
Preliminary Estimates of Project Timing, Sizing, and Cost
Operate in winter months
Up to 2,800 AFY
Cost could be in the $1,000 - $1,200/AF range
Project compatible with Joint Urban Recycled Water Project with MCWD
Next Steps
Construct monitoring wells near recharge area
Determine best pilot recharge location
Collaborate with other Agencies on Recharge
Schedule future visit to Orange County for interested parties
CONCLUSIONS
Project would be based on:
Highly successful Water Factory 21
MRWPCA experience of safely producing food crop irrigation water
Further using winter wastewater is a cost effective strategy that reuses a valuable resource
Project could be implemented relatively quickly (5 to 6 years)
Changing Wastewater Into Safe Water