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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. 94-815 LIBBEY-OWENS-FORD COMPANY WAREROOM AREA SAN JOAQUIN COUNTY Prior to construction, plans and specifications for ground water monitoring and/or extraction wells shall be submitted to Board staff for review and approval. After construction, new wells are to be sampled and analyzed for the constituents below and added to the monitoring program. GROUND WATER MONITORING Figure 1 is a location map. Figure 2 is a site map which shows the four ground water monitoring wells. Two wells are designated as MWs and the other two are designated as EWs. Monitoring wells with free phase petroleum product or visible sheen shall be monitored for product thickness and depth to ground water only. The ground water monitoring program for MWs 93-1 and 93-3, EWs 1 and 2, and any additional wells installed subsequently, except for wells containing free phase petroleum product or visible sheen, shall include the following: Sampling Constituents Units Tyne of Sample Frequency Depth to ground Feet ---- Quarterly water TPH as diesel' µg/l Grab Quarterly TPH as hydraulic fluid' µg/1 Grab Quarterly TPH as kerosene' µg/1 Grab Quarterly Semi-volatile Organic u g/1 Grab Quarterly Compounds' ' Report the hydrocarbon range. 2 Using U.S. EPA Method 625 REPORTING Quarterly reports shall be submitted to the Board by the 30th day of the month following the end of each calendar quarter until such time that the Executive Officer determines that the reports are no longer necessary. Each quarterly report shall include a ground water contour map, the status of any ongoing investigation or remediation, and in tabular form. the water quality data, depth to ground water, and free product thicknesses.