SITE INFORMATION AND CORRESPONDENCE

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2005-0827 FOR FORMER RIVER CITY PETROLEUM& FORMER CONNELL MOTOR LIFT TRUCK (AKA CONNELL TIRE), SAN JOAQUIN COUNTY This Monitoring and Reporting Program(MRP) is issued by the Executive Officer of the Regional Water Quality Control Board, Central Valley Region, (Regional Board)pursuant to California Water Code section 13267(b)(1). The Former River City Petroleum and Former Connell Motor Lift Truck (AKA Connell Tire) (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 property next to Wilson Way, which is the location of the former underground storage tanks (USTs). Three USTs were removed from the 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. In 2003, the UST site was transferred from San Joaquin County Environmental Health Department (SJCEHD) Local Oversight Program to the Regional Board. The Dischargers have discharged and/or are suspected of having discharged waste that could affect the quality of the waters of the state. 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. Petroleum hydrocarbons, including 1,2-dichloroethane (1,2-DCA) detected in groundwater beneath the property, appear to be the result of a release from past operations of the fueling station. Stoddard Solvent 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 release and spill appear to be commingled under the northwest corner of the warehouse. The Dischargers have installed, and began operation in November 2004, an Interim Soil Vapor Extraction (SVE) remediation system at the USTs source area. The Dischargers are continuing to delineate the vertical and lateral extent of waste in groundwater, including the petroleum hydrocarbons and solvents, prior to submitting a corrective action plan for cleanup of the site. Depth to groundwater is approximately 55 feet. There is a small supply well located 150 north of the groundwater plume that is used by a tenant of the property, reportedly to wash cars for an auto body shop. The constituents found at the site are "wastes" as defined in California Water Code section 13050. The wastes discharged at the site impair the beneficial uses of waters of the state. This MRP is necessary to delineate the extent of waste in groundwater and to determine the effectiveness of cleanup actions at the site. 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, SVE, or extraction wells, and prior to abandonment of any groundwater monitoring, SVE, 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.