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During the fourth quarter 2007 monitoring period no methane exceeded the regulatory limit of 5 <br /> percent in perimeter soil-pore gas probes at the Forward Unit, suggesting an overall <br /> improvement in landfill gas at the site. Forward continues to install additional landfill gas <br /> extraction wells (as needed), and makes regular adjustments to the landfill gas extraction system <br /> to optimize efficiency of the landfill gas extraction system. <br /> The results of the annual leachate sample indicate that of the constituents detected; only benzoic <br /> acid is a potential new constituent of concern (COC). 'A verification sample will be collected <br /> from the Forward leachate sample point in May 2008 and the results will be reported with the <br /> second quarter 2008 monitoring report. <br /> Groundwater quality conditions beneath the Austin Unit during the fourth quarter 2007 <br /> monitoring period are generally similar to historical results. CLs were exceeded in DMP wells <br /> AMW-7, AMW-13, and AMW-14, and with the exception of cis-1,2-DCE concentrations <br /> measured in well AMW-13, none of the CL exceedances exhibited statistically significant <br /> increasing trends. In the CAP wells, trend analyses are performed instead of comparison to CLs. <br /> During the current monitoring period, one or more statistically significant increasing trends were <br /> noted for VOC constituents in wells AMW-1, AMW-10, and AMW-19, while decreasing VOC <br /> trends were noted in CAP wells AMW-10 and AMW-11. The increasing cis-1,2-DCE trends in <br /> wells AMW-1 and AMW-10 suggest that active reductive dechlorination is occurring in the <br /> vicinity of these wells. <br /> The annual leachate sample results indicate that there were no new potential COCs. <br /> According to the Forward Landfill Operations Manager, weekly standard observations have been <br /> conducted during the reporting quarter. The Forward Landfill Operations Manager also reported <br /> that no surface water was discharged during the reporting period. <br /> If you have any questions regarding this report, please call me at (858) 451-1136. <br /> Sincerely, <br /> Wil iam B. pe PG, CHg <br /> Project Geol <br /> Attachment <br /> C:\2007-0043\F0RWARDLTP_D0C <br /> -2- <br /> GeoLogic Associates <br />