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California&gional Water Quality Cor*l Board <br /> Central Valley Region ( mom <br /> Karl E. Longley,ScD,P.E.,Chair <br /> Linda S.Adams Arnold <br /> .Sen emn_ , Sacramento Main Office <br /> 11020 Sun Center Drive#200.Rancho Cordova..California 95670-6114 Schwarzenegger <br /> l=n roieciimr Phone(916)464rn,al Governor <br /> 1'ro,ec, 3291 •FAX(916)464-4645 <br /> http://"uw.waterbouds.ca.gov/centralvalley <br /> 24 July 2008 lf1lL �! u��% i <br /> Mr. Gil Moore JUL 2 5 2008 <br /> New West Petroleum, Inc. ENVIRONMEW HEALTH <br /> 1831 16th Street PERMIT/SERVICES <br /> Sacramento, CA 95814 <br /> DOCUMENT REVIEW, NEW WEST PETROLEUM #1003 (SHELL BRANDED), <br /> 6437 BANNER STREET, LODI, SAN JOAQUIN COUNTY(CAO R5-2007-0709) <br /> I reviewed the Final Remediation Plan & Remediation System Design (FRP) submitted on <br /> 15 July 2008 by your consultant Closure Solutions, Inc. (CSI). The FRP was submitted in <br /> response to the requirements of Order# 15 of Cleanup and Abatement Order R5-2007 0709 <br /> (CAO), which states "Within 90 days of Water Board staff concurrence with the proposed <br /> remedial action described in the Feasibility Study but no later than 1 August 2008, submit a <br /> Final Remedial Plan (FRP). The FRP must include a detailed description of the remedial actions <br /> to address cleanup of the entire groundwater plume and source area soils. The FRP shall also <br /> include a schedule to implement all remedial actions." The FRP incorporates recommendations <br /> from the Feasibility Study, which were approved by the 3 April 2008 Regional Board staff letter. <br /> The FRP proposes upgrades to the existing interim groundwater pump and treatment system <br /> (GWP&TS) as the final remediation for the site (Enclosed Figure 1). Plans and specifications <br /> show six additional 4-inch diameter groundwater extraction wells (EW-6A, EW-7A, EW-7B, <br /> EW-8B, and EW-9B: Enclosed Figure 5) will be installed offsite to remediate the methyl tert- <br /> butyl ether (MtBE) groundwater plume in the A and B zones of the aquifer. The FRP states the <br /> new electric submersible pumps will initially operate at 9.8 gallons per minute (gpm); however, <br /> the pumps may be increased to a maximum 20 gpm if necessary to maintain hydraulic control <br /> of the MtBE groundwater plume. Piping from the new extraction wells to the existing onsite <br /> GWP&TS compound will be run inside an 8-inch plastic conduit that serves as secondary <br /> containment for the piping. The conduit will be placed underground by directional boring. The <br /> GWP&TS will receive a new piping manifold for the new wells, a sediment pre-filter, one 250- <br /> gallon holding tank, additional electrical and mechanical controls. The existing treatment units <br /> (three granulated activated charcoal canisters) were deemed adequate for the increased <br /> treatment flow to the GWP&TS. Discharge of treated groundwater to the storm sewer will <br /> continue under Regional Board General Order # 5-00-119 (Permit). <br /> The FRP startup procedures include sampling influent, mid-system, and effluent weekly for <br /> petroleum hydrocarbons until four weekly sampling event results are non-detect, then reducing <br /> the sampling schedule to monthly per the minimum required by the Permit. No additional <br /> analyses are required by the Permit. <br /> California Environmental Protection Agency <br /> Ca Reel c led Paper <br />