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FORWARD LANDFILL 9999 S.Austin Road Manteca,CA 95336 (209)982-4298,Fax(209)982-1009 January 16, 2012 JN: 2011-0051 Mr. Ross Atkinson Central Valley Regional Water Quality Control Board RECEIVED 11020 Sun Center Drive, #200 Rancho Cordova, CA 95670-6114 JAN 3 1 2012 SUBJECT: JULY—DECEMBER 2011 SECOND SEMIANNUAL/AN ONMENTAL HEALTH WATER QUALITY MONITORING REPORT "WMIT/SERVICES FRENCH CAMP LANDFILL SAN JOAQUIN COUNTY,CALIFORNIA_ Forward, Inc. (Forward) is pleased to submit the July through December 2011 semiannual and annual monitoring report for the French Camp Landfill, in compliance with the California Regional Water Quality Control Board- Central Valley Region(RWQCB) Waste Discharge Requirement(WDR) Order Number R5-2007-0046. This report summarizes standard observations and presents the results of surface-water, groundwater, and soil-pore gas monitoring from July I through December 31, 2011. This report also presents an annual summary that includes a summary of the analytical results for the last five years (2007 through 2011), time- series concentration plots for field and monitoring parameters, piper diagrams, and well hydrographs. During the monitoring period and over the 2011 monitoring year, no violations have been issued for the facility. Groundwater quality conditions beneath the French Camp Landfill during the monitoring period and over the 2011 I monitoring year are generally similar to those observed in previous monitoring periods. One concentration limit(CL)was exceeded for chloride in the sample collected from well MW-9B through the chloride concentration measured in this well was near its historical minimum value. Statistically significant increasing trends were calculated for potassium and sulfate in well MW-9B, and for chloride in well MW-10A. One or more statistically significant decreasing trends were calculated, for inorganic constituent concentrations, in all of the groundwater monitoring wells at the French Camp Landfill. For organic constituents, a decreasing trend was also calculated for trichlorofluoromethane (TCF ) in well MW-9A. During the monitoring period, chloroform and TCFM were measured above the practical quantitation limit in the samples collected from wells MW-6A and MW-9A, respectively, and a notification letter was sent to the RWQCB of these VOC detections on December 1, 2011. Confirmation sampling was not performed for background well MW-6A since similar concentrations of chloroform have already been confirmed and based on the lack of chloroform at the point of compliance, it is believed that the chloroform concentrations measured in well MW-6A are not the result of a release from the landfill. A retest sample was collected from well