SR 06:290 - Laserfiche WebLink

The site is owned by the D,S. Department of Army and DSRSD has a license from D,S. Department of Army to use the site, DSRSD is in the process of obtaining permanent ownership for the site. DSRSD and Zone 7 entered into an agreement for Zone 7 to use the site to construct a 7.7 MGD GW demineralization facility, Zone 7 is now in the final design and permitting process for the Project. The City owns a small portion of the proposed site development area, which is located near the proposed western driveway, as well as a portion of the property across the street (southerly) of the WDP site (Parcel A). Zoning of the property is P, Public and Institutional District. The General Plan designation is Public Health and Safety, consistent with the proposed use of the property by Zone 7. Need, Purpose and Choice of Location of Zone 7' sWellhead Demineralization Project Zone 7's Wellhead Demineralization Project is one component of Zone 7's Salt Management Plan (SMP). The SMP commenced in mid-1997 as a technical review of the problem, sources and solutions to the buildup of salts in the Tri-Valley's main groundwater basin. This technical work was completed in May of 1998 and identified three main methods for solving the salt buildup problem in the main basin: 1. Increased conjunctive use of the local groundwater basin, whereby additional groundwater pumping by Zone 7 would take place to attempt to export the salt out of the main basin and recharge the additional pumped water with better quality imported or local surface water supplies. 2. Injection of RO treated wastewater to help improve water quality in the main basin, This solution did not gain support and the two projects in the Valley (DSRSD's Clean Water Revival-CWR-Project and a smaller RO demonstration project built by the City of Livermore) have never become operational. 3. Wellhead Demineralization of higher elevation groundwater bearing zones. This solution included demineralizing (utilizing Reverse Osmosis filters) higher salt- laden groundwater, pumping the RO filtered groundwater (that, after treatment, would contain very low salts and other minerals) into the Zone 7 treated water system (to offset the higher salts coming from wells now being pumped by Zone 7) and pumping the filtered salts and minerals from the RO filters (salt laden brine) over the hill in the Livermore Amador Valley Water Management Agency (LA VWMA) pipeline. SR 06:290 Page 3 of7