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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Alan C.Lloyd Ph.D. Arnold Schwarzenegger <br /> Secretary for Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.waterboards.ca.gov/centralvalley <br /> Protection 11020 Sun Center Drive#200 Rancho Cordova,CA 95670.6114 <br /> Phone(916)464-3291 Fax(916)464-4797 <br /> 15 February 2006 VI/ilE DD <br /> FEB o S 2006 <br /> Mr. Gerald A. Stauffer ENV1R0i`,VaENT HEALTH <br /> Valero Logistics Operations, LP PER,11T,/SERVICES <br /> One Valero Way <br /> San Antonio, TX 78249-1112 <br /> REVIEW OF CLEANUP PLAN, SHORE TERMINALS, LLC, STOCKTON TERMINAL, <br /> 2940 NAVY DRIVE, STOCKTON, SAN JOAQUIN COUNTY <br /> Staff of the Central Valley Regional Water Quality Control Board (Central Valley Regional <br /> Board) reviewed the 5 January 2006 Cleanup Plan (Cleanup Plan) submitted by Ash Creek <br /> Associates, Inc. (Ash Creek) on behalf of ST Services, LLC (dba Valero Logistics Operations, <br /> LP) (Valero) for the Shore Terminals, LLC bulk fuel terminal at 2940 Navy Drive in Stockton <br /> (site). The Cleanup Plan describes various petroleum hydrocarbon releases from aboveground <br /> storage tanks at the site and remedial investigations at the site and surrounding properties that <br /> have occurred since 1992. The Cleanup Plan also discusses a 2003 remedial soil excavation and <br /> 2004 bioaugmentation pilot study that used a combination of proprietary additives and <br /> specialized oxygenation equipment to promote in situ biodegradation of petroleum hydrocarbons <br /> and fuel oxygenates. <br /> Valero proposes monitored natural attenuation (NINA) as the preferred remedial alternative for <br /> cleanup of site pollution based on apparent plume stability and decreasing groundwater chemical <br /> concentrations. Separate phase hydrocarbons (SPH) would be removed from well ST/MW-1 <br /> following baildown testing to evaluate whether periodic removal or skimmer installation are <br /> more effective. As a contingency plan, Valero proposes to remove SPH from wells other than <br /> ST/MW-1 if found during routine monitoring activities, and re-evaluate remedial alternatives for <br /> the site if the plume migrates, groundwater concentrations show an increasing trend, or land or <br /> groundwater uses change in the vicinity. <br /> Remedial action objectives (RAOs) described in the Cleanup Plan are to meet the water quality <br /> objectives for petroleum hydrocarbon compounds and related constituents according to the <br /> Central Valley Regional Board Basin Plan. The Basin Plan requires that groundwater chemical <br /> concentrations are protective of current and future beneficial uses of groundwater and if <br /> technically and economically feasible meet background concentrations. The RAOs would be <br /> accomplished through the removal of SPH that accumulate in monitoring well ST/MW-1, <br /> monitoring groundwater petroleum hydrocarbon concentrations to ensure continuing destruction, <br /> and verifying that land and water uses in the vicinity remain unchanged. Four downgradient <br /> monitoring wells would be sampled quarterly for MNA parameters to verify that conditions are <br /> California Environmental Protection Agency <br /> ca Recycled Paper <br />