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FORWARD LANDFILL 9999 S.Austin Road Manteca,CA 91336 (209)982-4298,Fax(209)982-1009 A"9 3 0 2010 ENVIRONMENT HEALTH April 29, 2010 PERMIT/SERVICES JN: 2010-0013 Mr. Ross Atkinson Central Valley Regional Water Quality Control Board 11020 Sun Center Drive, Suite 200 Rancho Cordova, CA 95670-6114 SUBJECT: FIRST QUARTER 2010 WATER QUALITY MONITORING REPORT FORWARD LANDFILL SAN JOAQUIN COUNTY, CALIFORNIA On behalf of Forward Incorporated(Forward), Geologic Associates (GLA) is pleased to submit the subject water quality monitoring report for the Forward Landfill in compliance with reporting requirements of the Regional Water Quality Control Board - Central Valley Region (RWQCB) Waste Discharge Requirements (WDRs) Order Number R5-2003-0049, which combined operations at the former Austin Road and Forward Landfills under a single permit. The combined landfills will be referred to as the Forward Landfill hereafter. The Forward Landfill is regulated by two monitoring programs including the RWQCB WDR Order No. R5-2003-0049; and the Department of Toxic Substances Control (DTSC) Post Closure Permit No. CAD 990794133. A separate annual report is submitted to the DTSC in March each year addressing the Post Closure Permit Requirements and focuses on Waste Management Unit(WMU) A. However, all analytical data are provided in each report and the requirements of each program are being satisfied. This report presents quarterly sampling results for the reporting period dating from January I to March 31, 2010 (first quarter 2010). For the Forward Unit, environmental monitoring for the first quarter 2010 yielded results similar to previous quarters. Eighteen new historical intrawell maximum values were measured in samples collected from groundwater monitoring wells, which nominally exceeded their previous intrawell maximum values. In addition, two of the intrawell maximum values are suspected field/laboratory contaminants. Excluding suspected field/laboratory contaminants, dichlorodifluoromethane(DCDFM) and trichlorofluoromethane(TCFM)were measured above the practical quantitation limit (PQL), and 1,1-dichloroethane(1,1-DCA),tetrachloroethane (PCE), and trichloroethene(TCE)were detected at estimated trace concentrations in the sample collected from well MW-10; PCE and TCE were measured above the PQL, and 1,1-DCA, cis- 1,2-dichloroethene(cis-1,2-DCE), DCDFM, and TCFM were detected at trace concentrations in the sample collected from well MW-14; DCDFM and TCFM were measured at trace concentrations in the sample collected from well MW-15; and carbon disulfide was measured at a trace concentration in the sample collected from well MW-19. Concentration limits (CLs) were exceeded for one or more monitoring parameters in samples from wells MW-10, MW-14, MW-19, and MW-22. In accordance with the RPCMP, inorganic exceedances of CLs that are potential impact constituents will be resampled in May 2010 (during the second quarter 2010