SITE INFORMATION AND CORRESPONDENCE

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2005-XXXX FOR FORMER RIVER CITY PETROLEUM &FORMER CONNELL MOTOR LIFT TRUCK (AKA CONNELL TIRE), SAN JOAQUIN COUNTY The site is located at 2211 N. Wilson Way(formerly State Highway 99) in Stockton (Figure 1). River City Petroleum (RCP) previously operated a truck fueling station on the eastern side of the prop y next to Wilson Way, which is the location of the former underground storage tanks (USTs). Three U s were removed from the subject site in June 1998. RCP leased the property from Connell Tire. Records show that the truck fueling station began operations prior to 1940. Connell Motor Lift Truck (CMLT), a former forklift repair service, operated out of a warehouse adjacent to the former truck fueling station. -Connell Tire currently owns the property and uses the warehouse to store and repair tires. Connell Tire and former River City Petroleum are hereafter collectively identified as the Dischargers. Petroleum hydrocarbons, including 1,2-dichloroethane (1,2-DCA) detected in groundwater beneath th property, appear to be the result of releases from past operations of the fueling station. Stoddard Solve t detected in groundwater near a suspected dry well northwest of the warehouse appears to be related to a spill at the former forklift repair service. The releases appear to be commingled under the northwest corner of the warehouse. In 2003, the USTs site was transferred from San Joaquin County Environmental Health Department(SJCEHD) Local Oversight Program to the Regional Board. An Interim Soil Vapor Extraction (SVE)remediation system began operation in November 2004 at the USTs source area. The Dischargers are continuing to delineate the vertical and lateral extent of the petroleum hydrocarbons pollution in groundwater, prior to submitting a corrective action plan for remediation of the site. DepA groundwater is approximately 55 feet. There is a small supply well located 150 north of the groundw plume that is used by a tenant of Connell Tire, reportedly to wash cars for an auto body shop. This pollution impairs the beneficial use of this water resource. 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 and determine whether remediation efforts are effective. Existing data and information about the site show the presence of petroleum hydrocarbons and fuel additives emanating from the property under the control of the Dischargers, and resulting from the Dischargers' current or past operation. The Dischargers shall not implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer or until Regional Board staff approve those changes in writing. Prior to construction of any new groundwater monitoring or extraction wells, and prior to abandonment of any groundwater monitoring or extraction wells, the Dischargers shall submit plans and specifications to Regional Board staff 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. GROUNDWATER MONITORING As shown on Figure 2, there are thirty seven groundwater monitoring wells, designated MW-1 through MW-37. Also, there is one groundwater extraction well (EW-1), two groundwater extraction observation wells (OW-1 and OW-2), twenty nine soil vapor extraction (SVE) wells (VW-IA through VW-15B) for the SVE remediation system, and one onsite water supply well. The groundwater monitoring program for