Zone 7 Mocho Groundwater Demineralization Plant Project

3 Documents in Project

Summary

SCH Number
2006022139
Lead Agency
Zone 7 Water Agency
Document Title
Zone 7 Mocho Groundwater Demineralization Plant Project
Document Type
NOD - Notice of Determination
Received
Posted
8/18/2006
Present Land Use
Public Safety / Public and Institutional

Document Description
The proposed project consists of construction and operation of a 7.7 mgd demineralization facility, which would be located adjacent to Arroyo Mocho off Stoneridge Drive and Santa Rita Road in the city of Pleasanton, California. The facility would treat potable water supplies from existing wells in the vicinity. Operation of the proposed facility would consist of demineralization or reverse osmosis treatment of source or raw water from the water wells. Reverse osmosis (RO) is a physical separation process, in which water is pressurized and passed through a semi-permeable membrane. Molecular constituents (i.e., calcium, magnesium, sodium, etc.) larger than the molecular pore size of the membrane do not pass through, and exit the membrane system as concentrate. Demineralized water molecules pass through the membrane and exit the system as permeate or product. Demineralization would occur through the use of an RO membrane-based treatment, producing permeate water and concentrate. Zone 7 would blend permeate with other groundwater (non-demineralized) and/or surface water before delivery to achieve a target total dissolved solids or hardness level. The concentrate solution resulting from the RO process would be discharged into San Francisco Bay via the existing Dublin San Ramon Services District (DSRSD) pipelines, the Clean Water Revival (CWR) pipeline, and the Livermore Valley Water Management Agency (LAVWMA) pipeline. The LAVWMA pipeline connects to the existing East Bay Dischargers Authority (EBDA) outfall into the Bay.

Contact Information
Jarnail Chahal
Zone 7 Water Agency
100 North Canyons Parkway
Livermore, CA 94551

Phone : (925) 454-5027

Location

Cities
Pleasanton
Counties
Alameda
Cross Streets
Stoneridge Drive and Santa Rita Road
State Highways
I-580
Schools
Fairlands ES
Waterways
Arroyo Mocho

Notice of Determination

Approving Agency
Zone 7 Water Agency
Approving Agency Role
Lead Agency
Approved On
Final Environmental Document Available at
N/A

Determinations

(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
N/A

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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