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MONITORING AND REPORTING PROGRAM NO. 6 FORWARD INC. ALLIED WASTE INC. FOR CLOSURE OF FRENCH CAMP MUNICIPAL SOLID WASTE LANDFILL SAN JOAQUIN COUNTY The Discharger shall determine the groundwater flow rate and direction in the uppermost aquifer and in any zones of perched water and in any additional zone of saturation monitored pursuant to this Monitoring and Reporting Program, quarterly, including the times of highest and lowest elevations of the water levels in the wells. Quarterly water levels potentiometric surface maps will be reported in the detection monitoring report. Hydrographs of each well shall be submitted showing the elevation of groundwater with respect to the elevations of the top and bottom of the screened interval and the elevation of the pump intake. Hydrographs of each well shall be prepared quarterly and submitted annually. Groundwater samples shall be collected from the point-of-compliance wells, background wells, and any additional wells added as part of the approved groundwater monitoring system. Samples shall be collected quarterly for one year after completion of closure construction and semi-annually there after. Samples will be analyzed for the monitoring parameters in accordance with the methods specified in Table I. The monitoring parameters shall also be evaluated each reporting period with regards to the cation/anion balance, and the results shall be graphically presented using a Stiff diagram, a Piper graph, or a Schueller plot. Samples for the constituents of concern specified in Table I shall be collected and analyzed in accordance with the methods listed in Table VI every five years. 2. Landfill Gas Monitoring The Discharger shall operate and maintain a landfill gas detection monitoring system in accordance with a detection monitoring plan approved by the Executive Officer. The Discharger shall collect,preserve, and transport samples in accordance with the quality assurance/quality control standards contained in the approved Sample Collection and Analysis Plan. Landfill gas samples shall be collected from the monitoring devices and background monitoring devices of the approved monitoring system. The collected samples shall be analyzed for the listed constituents in accordance with the methods specified in Table II. Landfill gas samples shall be collected quarterly for one year after completion of closure construction and semi-annually thereafter. All monitoring parameters shall be graphed so as to show historical trends at each monitoring point.