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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO.R5-2004-0820 <br /> CALIFORNIA WATER CODE SECTION 13267 <br /> FOR <br /> SOUTH SHORE PARCELS,L&M OPERABLE UNIT <br /> CONOCOPHILLIPS PETROLEUM COMPANY;CHEVRON,U.S.A.; <br /> TEXACO REFINING AND MARKETING,INC.;TOSCO CORPORATION; <br /> L&M PETROLEUM COMPANY,INC.;AND MR.BILLY MCKINNON <br /> STOCKTON,SAN JOAQUIN COUNTY <br /> ConocoPhillips Petroleum Company;Chevron,,U.S.A.;Texaco Refining and Marketing,Inc.;Tosco <br /> Corporation; L&M Petroleum Company,Inc.; and Mr.Billy Mckinnon,collectively hereafter referred to <br /> as Discharger, are jointly responsible for the South Shore Parcels L&M Operable Unit(OU)formed as a <br /> result of the breakup of the Stockton Group. The other corporations associated with the former Stockton <br /> Group are responsible for the Unocal OU and Morton OU. The Discharger is responsible for cleanup of <br /> the area west of the midline of the former Harrison Street,with the midline extending south to Mormon <br /> Slough and north to the Stockton Deep Water Channel,which is shown on Figure 1,and the Delta <br /> Gateway Apartments. Historically,bulk fuel storage/distribution facilities,various commercial uses,and <br /> residential buildings occupied these areas,which resulted in releases of chemicals to the subsurface. <br /> This pollution impaired the beneficial use of this water resource. The Discharger owned and/or operated <br /> petroleum storageldistnbution facilities on Parcel 2A,which is owned by the Stockton Redevelopment <br /> Agency. Groundwater is about i5 feet below ground surface. The Discharger is currently operating a <br /> dual phase extraction(DPE) system to remove separate phase hydrocarbons(SPH). <br /> This Monitoring and Reporting Program(MRP)is issued pursuant to Section 13267 of the California <br /> Water Code and is necessary to delineate groundwater pollutant plumes and determine whether <br /> remediation efforts are effective. Existing data and information about the site show the presence of <br /> various chemicals,including total petroleum hydrocarbons(TPH)as gasoline,TPH as diesel,TPE as <br /> motor oil,benzene,toluene,ethylbenzene,xylenes,metals,volatile organic compounds,and semi- <br /> volatile organic compounds emanating from the property due to the Discharger's past operations. The <br /> Discharger shall not implement any changes to this MRP unless and until a revised MRP is issued by the <br /> Executive Officer. This MRP replaces the requirements listed in MRP No.R5-2003-0802,which was <br /> issued on 27 January 2003. <br /> Prior to construction of any new groundwater monitoring or extraction wells,and prior to destruction of <br /> any groundwater monitoring or extraction wells,the Discharger shall submit plans and specifications to <br /> the Board for review and approval. Once installed, all new wells shall be added to the monitoring <br /> program and shall be sampled and analyzed according to the schedule below. <br /> GROUNDWATER MONITORING <br /> As shown on Figure 1,there are 53 monitoring wells associated with the three OUs. Two of the <br /> monitoring wells are either missing or damaged. Forty of the 53 wells are associated with the area <br /> owned/operated by the Discharger. Of the 40 wells,there are 12 wells associated with the DPE system, <br /> 20 shallow zone monitoring wells,and eight deeper water bearing zo4e monitoring wells. The <br /> groundwater monitoring program for the 40 wells and any wells installed subsequent to the issuance of <br /> this MRP,shall follow the schedule below. Monitoring wells with SPH or visible sheen shall be <br /> monitored, at a minimum,for product thickness and depth to water. The volume of extracted <br />