FINAL REPORT Evaluation of Seawater Desalination Projects ...

EVALUATION OF SEAWATER DESALINATION PROJECTS
PROPOSED FOR THE MONTEREY PENINSULA
3.2 Monterey Bay Regional Seawater Desalination Project
(MBRSDP)
Project Purpose
The MBRSDP is proposed by Pajaro/Sunny Mesa Community Services District (P/SMCSD)
to enable the Monterey Peninsula area to comply with SWRCB Order No. 95-10, to offset
overdraft of the Seaside Groundwater Basin, and to provide supplemental water supplies to
serve portions of Northern Monterey County.
Customers Identified
The MBRSDP will serve the Monterey Peninsula, the service area of the P/SMCSD, and
other areas of Northern Monterey County and portions of the Pajaro Valley Water
Management Agency 13 service area. A regional desalination plant capable of meeting the
regional requirements is envisioned. The plant would be constructed in phases as additional
users are brought into the system.
However, although at present the identified project water demands include 10,730 ac-ft per
year to comply with SWRCB order No. 95-10 and 3,000 ac-ft per year to reduce overdraft of
the Seaside Groundwater Basin, no additional supply is proposed to meet future demands in
the Monterey Peninsula area.
Technology Appropriate/Demonstrated on this or Similar Supply
The technical description for the MBRSDP is included in the Conceptual Design Report
13
(CDR) and the project’s Proposition 50 Pilot Project Grant Application to California
Department of Water Resources.
14 Both documents were prepared by Poseidon Resources
for P/SMCSD.
The proposed treatment process is based on the use of RO to accomplish the water quality
objectives of the project. The proposed feed water source has been documented to
experience high turbidity, and extensive pretreatment systems have been included to provide
suitable feed water to the RO process.
Pretreatment
Currently, clarification followed by filtration is anticipated to be the major pretreatment
steps. The project will rely on pilot testing to identify the optimum pretreatment approach.
13 Pajaro/Sunny Mesa Community Services District in Cooperation with Poseidon Resources Corporation,
Monterey Bay Regional Desalination Project, Conceptual Design Report, April 2006.
14 Pajaro/Sunny Mesa Community Services District, Monterey Bay Regional Desalination Project, Proposition
50 P/SMCSD Pilot Demonstration Project Grant Application, March 22, 2006.
Monterey Peninsula Water Management District 3-9