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eoogic Associates <br /> Geologists, Hydrogeologists and Engineers <br /> July 27, 2007 <br /> JN: 2007-0044 <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: SECOND QUARTER 2007 MONITORING REPORT <br /> FRENCH CAMP LANDFILL <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> On behalf of Forward, Inc. (Forward), GeoLogic Associates is pleased to submit the second <br /> quarter 2007 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 during the second quarter 2007. A summary of <br /> analytical results and time-series concentration plots for field and monitoring parameters are also <br /> included in this report. A description of field procedures and sampling protocols followed by <br /> personnel conducting field monitoring activities is included in Appendix B of the report. <br /> Groundwater quality conditions beneath the French Camp Landfill during the second quarter <br /> 2007 monitoring period are generally similar to those observed in previous monitoring periods. <br /> During the second quarter 2007 monitoring period, inorganic CLs were exceeded in DMP wells <br /> MW-9A, MW-913, and MW-10A. In addition, organic constituent results indicate the TCFM <br /> concentration was measured above the PQL in the sample collected from well MW-9A, and is <br /> likely related to the recently constructed final cover system and an associated increase in LFG <br /> generation. In a meeting with the RWQCB on March 9, 2007,Forward proposed quarterly <br /> monitoring of existing groundwater monitoring wells and soil-pore gas probes through May 2008 <br /> to evaluate the significance of landfill gas at the site. <br /> The results of water quality analyses completed for leachate monitoring well MW-2 indicates <br /> that no VOCs were detected in the sample from this well during the current monitoring period. <br /> The results of water quality analyses completed for surface-water monitoring stations are <br /> generally consistent with previous results. Carbon disulfide was detected above the PQL in the <br /> sample collected from background station SW-1,and toluene was detected at a trace <br /> concentration in the sample collected from station S -3. However,carbon disulfide is naturally <br /> emitted by marshes and should be considered reflective of regional and/or non-facility impacts. <br /> Trend analyses indicate that turbidity at surface water stations SW-1, SW-2, and SW-3 depict <br /> 16885 W. Bernardo Dr., Suite 305, San Diego, CA 92127 Phone: (858) 451-1136 Fax: (858) 451-1087 <br />