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Water Quality Monitoring Report Forward Landfill EXECUTIVE SUMMARY . Forward Incorporated (Forward) 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 115-2014-0006. This report presents quarterly sampling results for the reporting period from October 1 to December 31, 2015 (fourth quarter 2015) and also provides an annual summary of the results from the 2015 monitoring year. According to the Forward Landfill Operations Manager, standard observations have been conducted weekly during the reporting quarter. The Forward Landfill Operations Manager also reported that no surface water was discharged from the facility during the reporting period. During the fourth quarter 2015 monitoring period and over the 2015 monitoring year, no notices of violation were issued by the San Joaquin County Environmental Health Department or RWQCB, and no changes have been made to the groundwater monitoring systems. For the Forward Unit, environmental monitoring for the fourth quarter 2015 and over the past year yielded results consistent with historical groundwater conditions. During the fourth quarter 2015 monitoring period, a non -statistical indication of release was identified at well MW -16 as a result of one volatile organic compound (VOC) (diisopropyl ether) measured at a quantifiable concentration, and at well MW -17 as a result of quantifiable concentrations of chloroform and carbon tetrachloride. No other VOCs were measured above a quantifiable concentration in groundwater samples collected during the fourth quarter 2015 monitoring period. For the inorganic monitoring parameters, concentration limits (CLs) were exceeded at wells MW -10, MW -18, and MW -24. Verification sampling for the inorganic CL exceedances is scheduled for February 2016. For constituent concentrations in "Tracking Mode" an increasing trend was calculated for chloroform at well MW -17. In response, Forward is in the process of bringing online several inactive LFG extraction welts in the vicinity of well MW -17. Surface water stations were reported dry during the fourth quarter 2015 monitoring period. Vadose zone monitoring stations were also reported dry or had an insufficient volume of soil -pore liquid for analysis. Groundwater quality conditions beneath the Austin Unit for the fourth quarter 2015 and over the past year yielded results consistent with historical groundwater conditions. With the exception of well AMW-6, no CL exceedances or non -statistical indication of release were identified in any of the Detection Monitoring Program (DMP) wells during the fourth quarter 2015 monitoring period. It is recognized that well AMW-6 should have been identified as a Corrective Action Program (CAP) well. For the CAP/evaluation wells, 16 wells reported one or more VOCs exceeding a practical quantitation limit (PQL), with CAP well AMW-1 having the greatest number of VOCs (13), including 10 measured above a PQL. Surface water stations were reported during the fourth quarter 2015 monitoring period. With the exception of FU -04W all of the lysimeters were reported dry, though, there was insufficient soil pore liquid from FU -04W for analysis. To mitigate impacts at the Austin Unit, the groundwater treatment facility (GTF) pumped 20.8 million gallons of groundwater from the extraction wells resulting in the removal of 1.40 pounds of VOCs. M:\ 2015.0014\ExecSum 4Q15.docx E-1 1/27/2016, Rev. 0