SITE INFORMATION AND CORRESPONDENCE

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2003-0808 FOR LEPRINO FOODS COMPANY SAN JOAQUIN COUNTY The Leprino Foods Company(Discharger) owns and operates a food processing facility at 2401 MacArthur Drive in Tracy. The site includes an area south of the facility formerly known as the Mobil Bulk Oil Plant (Mobil), which the Discharger purchased in 1998. Groundwater, at a depth of about 10 feet, and overlying soil are polluted with total petroleum hydrocarbons as diesel (TPHd). The groundwater monitoring network at Leprino Foods Company includes monitoring wells on the Mobil site. The Discharger has installed a groundwater extraction and treatment system to control groundwater gradient and recover petroleum hydrocarbons, and is evaluating the use of bioventilation to accelerate aerobic decomposition of the pollutants. This Monitoring and Reporting Program(MRP) is issued pursuant to Section 13267 of the California Water Code and is designed to delineate groundwater pollutant plumes and determine whether remediation efforts are effective. Existing data and information about the site show the presence of TPHd emanating from the property under 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 groundwater monitoring requirements listed in the MRP No. 5-00-833,which was issued on 24 August 2000. 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 17 monitoring wells (including three Mobil wells) and three groundwater extraction wells at the site. Monitoring wells MW-13, 14, and 15 were abandoned in 2000 due to plant expansion. Recovery well EW-2 was connected to the groundwater extraction system in 2002 to provide additional hydraulic control of the groundwater plume. Wells MW-2, 7, 8, 9, and 10 shall be monitored quarterly for groundwater levels only. The groundwater monitoring program for wells MW-3, 4, 5, 6, 11, 14A, 16, 17, and 18,RW-1,RW- 2,RW-3 and any wells installed subsequent to issuance of this MRP, shall include the list below. Monitoring wells with free-phase petroleum product or visible sheen shall be monitored for product thickness and depth to groundwater only. Monitoring of product presence in monitoring wells shall occur on a monthly basis. If product is found in monitoring wells,product removal shall occur until no measurable product remains in the well. Sample collection and analysis shall follow standard EPA protocol.