SITE INFORMATION AND CORRESPONDENCE

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2003-0802 FOR SOUTH SHORE PARCELS,L&M OPERABLE UNIT CONOCOPHILLIPS PETROLEUM COMPANY; CHEVRON, U.S.A.; TEXACO REFINING AND MARKETING, INC.; TOSCO CORPORATION; L&M PETROLEUM COMPANY, INC.; AND MR. BILLY MCKINNON STOCKTON, SAN JOAQUIN COUNTY ConocoPhillips Petroleum Company; Chevron,U.S.A.; Texaco Refining and Marketing, Inc.; Tosco Corporation; L&M Petroleum Company, Inc.; and Mr. Billy McKinnon, collectively hereafter referred to as Discharger, are jointly responsible for the South Shore Parcels L&M Operable Unit(OU) formed as a result of the breakup of the Stockton Group. The other corporations associated with the former Stockton Group are responsible for the Unocal OU and Morton OU. The Discharger is responsible for cleanup of the area west of the midline of the former Harrison Street,with the midline extending south to Mormon Slough and north to the Stockton Deep Water Channel, which is shown on Figure 1, and the Delta Gateway Apartments. Historically, lumber mills,bulk fuel storage/distribution facilities, a paint manufacturer, various commercial uses, and residential buildings occupied these areas, which resulted in releases of chemicals to the subsurface. The Discharger owned and/or operated petroleum storage/distribution facilities on Parcel 2A,which is owned by the Stockton Redevelopment Agency. Previous investigations found soil and groundwater pollution in the area owned/operated by the Discharger. Pollutants detected in soil and/or groundwater include total petroleum hydrocarbons as gasoline, diesel, and motor oil,benzene, toluene, ethylbenzene, and xylenes,metals,volatile organic compounds, and semi-volatile organic compounds. Groundwater is about 15 feet below ground surface and flows predominantly to the south and southeast, away from the Stockton Deep Water Ship Channel. This Monitoring and Reporting Program (MRP)is issued pursuant to Section 13267 of the California Water Code and is necessary to delineate groundwater pollutant plumes. Existing data and information about the site shows the presence of various chemicals, as stated above, emanating from the property resulting from the Discharger's past operation. The Discharger shall not implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer. This MRP replaces the requirements listed in MRP No. R5-2002-0804, which was issued on 21 March 2002, to the Stockton Group. Prior to construction of any new groundwater monitoring or extraction wells, and prior to abandonment of any groundwater monitoring or extraction wells,the Discharger shall submit plans and specifications to the Board for review and approval. Once installed, all new wells shall be added to the monitoring program and shall be sampled and analyzed according to the schedule below.