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performed semiannually using a field screening protocol,unless methane is detected above 2.5 percent. 6.0 SUMMARY Groundwater quality conditions beneath the French Camp Landfill during the monitoring period are generally similar to those observed in previous monitoring periods. Inorganic CLs were exceeded for calcium, chloride, and potassium in DMP well MW-9B. However, none of these constituents exhibited a statistically significant increasing trend during the monitoring period. Organic constituent results indicate no VOCs were detected in groundwater monitoring wells or the leachate well during the monitoring period. As indicated previously in our letter dated March 12, 2007,it is not uncommon to find slight increases (microgram per liter) in the concentrations of VOCs shortly after final cover construction is complete that over time stabilize or decline as the final cover matures and a geochemical equilibrium is reached. The results of water quality analyses completed for surface-water monitoring stations are generally consistent with previous results. Carbon disulfide was detected at a concentration of 4.1 pg/L in the sample collected from station SW-3. Pursuant to 27CCR, the RWQCB was notified in writing of the non-statistical indication of a release from station SW-3. No VOCs were detected in either of the retest samples collected on July 17, 2008, indicating that the detection of carbon disulfide in the primary sample was a false positive result. Trend analyses indicate that turbidity at surface water stations SW-1, SW-2, and SW-3 depict statistically significant increasing trends. Since turbidity exhibits a statistically significant increasing trend at background surface water stations SW-1 and SW-2, the increasing trend in turbidity at SW-3 is unlikely to be indicative of an impact from the facility. Up to 15 VOCs were detected in the samples from soil-pore gas monitoring probes during the current monitoring period, with the samples from probes SGP-2A and SGP-7A containing the highest total concentration of VOCs. However, no methane was detected in soil-pore gas monitoring probes during the current monitoring period. These recent sampling events represent the final quarterly events at the French Camp Landfill. Pursuant to M&RP Order No. R5-2007-0046, Section D.2 subsequent soil-pore gas sampling will be performed semiannually using a field screening protocol. D:\2003-W12\FC_jSA08rvv1.doc 6 Geologic Associates