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Woolsey Oil Ocmpany San Joaquin County CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5 -2002 - FOR WOOLSEY OIL COMPANY BULK FUEL PLANT SAN JOAQUIN COUNTY The Woolsey Oil Company bulk fuel plant (site) is at 930 Victor Road in Lodi. There are five 12,000 -gallon aboveground storage tanks (AGTs) containing diesel fuel, one 1,000 -gallon AGT containing kerosene, and one 275 -gallon AGT containing solvents. Historic petroleum hydrocarbon releases have contaminated soil and groundwater at the site with petroleum hydrocarbons and associated fuel constituents, including benzene and methyl tertiary butyl ether (MTBE). Free product is consistently present in well MW -8. Woolsey began groundwater monitoring in 1995, which continues on a quarterly and semi-annual basis. 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 shows the presence of various chemicals, including total petroleum hydrocarbons as gasoline and diesel, benzene-toluene-ethylbenzene-xylenes (BTEX), and fuel oxygenates, including MTBE emanating from the property under the control of the Discharger. 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. 5-01-841, which was issued on 24 June 2001. Prior to construction of any new 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. GROUNDWATER MONITORING As shown on Figure 1, there are currently 10 monitoring wells onsite and offsite. Woolsey abandoned MW -1 in January 2001, so it is not included in the MRP. All wells shall be monitored for depth to groundwater and the presence of free product on a quarterly basis. The groundwater monitoring program for wells MW -2 through MW -10 and any wells installed subsequent to issuance of this MRP, shall include the list below. Monitoring wells with free product or visible sheen shall be monitored for free product thickness and depth to groundwater only. Sample collection and analysis shall follow standard EPA protocol.