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FORWARD LANDFILL 9999 S.Austin Road <br /> Manteca,CA 95336 <br /> (209)982-4298,Fax(209)982-1009 <br /> January 28, 2009 <br /> JN: 2009-0018 <br /> Mr. Ross Atkinson <br /> Central Valley Regional Water Quality Control Board <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, CA 95670-6114 <br /> SUBJECT: JULY-DECEMBER 2009 SECOND SEMIANNUAL AND ANNUAL <br /> WATER QUALITY MONITORING REPORT <br /> FRENCH CAMP LANDFILL <br /> SANJOAQUIN COUNTY, CALIFORNIA <br /> Forward, Inc. (Forward) is pleased to submit the July through December 2009 semiannual and <br /> annual monitoring report for the French Camp Landfill, in compliance with the California <br /> Regional Water Quality Control Board- Central Valley Region (RWQCB)Waste Discharge <br /> Requirement(WDR) Order Number R5-2007-0046. <br /> This report summarizes standard observations and presents the results of surface-water, <br /> groundwater, and soil-pore gas monitoring from July I through December 31, 2009. A summary <br /> of the monitoring results obtained for the 2009 monitoring year, time-series concentration plots <br /> for field and monitoring parameters, piper diagrams, and well hydrographs are also included in <br /> this report. A description of field procedures and sampling protocols followed by personnel <br /> conducting field monitoring activities is included in Appendix B of the report. <br /> Groundwater quality conditions beneath the French Camp Landfill during the monitoring period <br /> are generally similar to those observed in previous monitoring periods. Concentration limits <br /> (CLs) were exceeded for one or more constituents in the samples collected from wells MW-6A, <br /> MW-8A, MW-9A, MW-9B and MW-10A,however,with the exception of the chloride <br /> concentration measured in the sample collected from well MW-10A, none of the constituents <br /> that exceeded a CL exhibited a statistically significant increasing trend during the monitoring <br /> period. Previous statistical exceedances for chloride and total dissolved solids (TDS)have been <br /> identified in samples from well MW-I OA and a no release demonstration for groundwater <br /> monitoring well MW-I OA(Herst, 2005) concluded that the French Camp Landfill has been <br /> impacted by saltwater intrusion and the elevated chloride and TDS concentrations measured in <br /> well MW-I OA are believed to be the result of this condition and not the result of landfill-related <br /> impacts. <br /> Organic constituent results indicate that chloroform was measured above the practical <br /> quantitation limit in the samples collected from background well MW-6A. However, the <br /> detection of chloroform in background well MW-6A is not believed to the result of a release <br />