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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 dating from April 1 to June 30, 2015 (second quarter 2015). According to the Forward Landfill Operations Manager, standard observations have been conducted weekly during the reporting period. The Forward Landfill Operations Manager also reported that no surface water was discharged from the facility during the reporting period. During the second quarter 2015 monitoring period, no notices of violation (NOVs) were issued by the San Joaquin County Environmental Health Department. For the Forward Unit, environmental monitoring for the second quarter 2015 yielded results similar to previous quarters. A non-statistical indication of release was identified at well MW- 16 as a result of one volatile organic compound (VOC) measured at a quantifiable concentration, and one VOC measured at an estimated-trace concentration; and at well MW-17 as a result of one VOC measured at a quantifiable concentration, and three VOCs measured at estimated-trace concentrations. For the inorganic monitoring parameters, concentration limits (CLs) were exceeded at wells MW-2A, MW-3, MW-14, MW-18, and MW-23R. Verification sampling for the organic and inorganic CL exceedances is scheduled for July 2015. Surface water stations were reported dry during the second quarter 2015 monitoring period. For vadose zone monitoring up to 11 VOCs were detected in soil-pore liquid samples and approximately 1670 gallons of liquid was pumped from pan lysimeter WMU-D01N. Groundwater quality conditions beneath the Austin Unit were generally similar to historical results during the second quarter 2015 monitoring period. Although it is recognized that well AMW-6 is a Corrective Action Program (CAP) well mis-identified as a Detection Monitoring Program (DMP) well, six inorganic CLs were exceeded and a non-statistical indication of release was identified at well AMW-6. In addition, the CL for sodium was exceeded in well AMW-7. With the exception of AMW-6, no other VOCs were detected in DMP wells. For the CAP/evaluation wells, 17 of 28 wells reported one or more VOCs exceeding a PQL, with CAP well AMW-1 having the greatest number of VOCs (14), including 10 measured above a PQL. All surface water stations and lysimeters were reported dry during the second quarter 2015 monitoring period. Under the existing CAP, the Groundwater Treatment Facility pumped 11.0 million gallons of groundwater removing an estimated 0.89 pounds of VOCs. M:\2015.0014\ExecSum 2Q15.docx E-1 7/30/2015,Rev.0