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• 0 CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2002-XXXX FOR BRITISH PETROLEUM OIL COMPANY/ APPLIED AEROSPACE STRUCTURES CORPORATION SITE SAN JOAQUIN COUNTY The site is located at 3437 Airport Way, Stockton, San Joaquin County. Originally developed in 1968 for aerospace manufacturing and testing applications, the site underwent several ownership changes until 1988, when the Applied Aerospace Structures Corporation was acquired by British Petroleum Oil Company (Discharger). Raw materials used at the facility included adhesive resins, organic solvents, acids and paints. Soil and groundwater, which is about 40 feet deep, is polluted with volatile organic compounds. This pollution impaired the beneficial use of this water resource. The Discharger has implemented corrective action measures, including soil vapor extraction from March 1999 to December 2000, and a groundwater extraction and treatment system (GWETS). The GWETS continues to operate to achieve gradient control and to remove pollutants from the groundwater. The extracted groundwater is treated by carbon filters and discharged under permit to the City of Stockton sanitary sewer system. 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 various chemicals, including trichloroethylene (TCE) and 1,1-dichloroethylene (1,1-DCE), 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. 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. GROUNDWATER MONITORING As shown on Figure 1, there are 14 monitoring wells (MW -1 through MW -14) and six groundwater extraction wells (GW -1 through GW -6). The groundwater monitoring program for the 14 monitoring wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule below. The volume of extracted groundwater also shall be provided in semi- annual monitoring reports. Sample collection and analysis shall follow standard EPA protocol. F ul