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It is unlikely that the increasing trend in turbidity is a result of landfill activities. Siltation within the ® well is often the cause of an increase in turbidity that does not affect the water quality of the aquifer outside of the well. As such, turbidity is an indicator of well function and not an indicator of landfill impact to groundwater. MW-3 (Directly Down-Gradient) Concentrations of all the parameters analyzed were within established concentration limits this semester except for Turbidity (Table 1). The trend analysis by Sanitas software indicates increasing trends for Turbidity, TDS, and a decreasing trend for Chloride, and Sulfate during the first semester 2013 sampling event. One VOC (CFC-12) was detected in MW-3 at trace concentrations during the first semester 2013 sampling event conducted on February 1, 2013. CFC-12 was also detected at trace concentrations in MW-3 during the resampling event conducted on March 1, 2013. The consistent detection of VOCs in this well is unusual. The presence of VOCs in this well be securitized during the next routine monitoring event. MW-4 Concentrations of all the parameters analyzed were within established concentration limits this semester except for Turbidity (Table 1). The trend analysis by Sanitas software indicates increasing trends for EC, Turbidity, TDS, and a decreasing trend for Chloride, Nitrate and Sulfate during the first semester 2013 sampling event. However, as presented below, it is likely the increasing trend in these parameters appears to be due to be the treatment ponds of the migrant labor camp and not the landfill. Four VOCs (Benzene, Toluene, Ethylbenzene, and Total Xylenes) were detected in MW-4 during the first semester 2013 sampling event conducted on February 1, 2013. Benzene, Toluene, Ethylbenzene, and Total Xylenes were also detected during the resampling event conducted on March 1, 2013. The consistent detection of VOCs in this well is unusual. The presence of VOCs in this well be securitized during the next routine monitoring event. MW-5 Concentrations of all the parameters analyzed were within established concentration limits this semester except for Turbidity (Table 1). A trace concentration of PCE and above trace concentration of CFC-12) were reported in MW-5 during the first semester 2013 sampling event. MW-5 was installed between the sewage treatment ponds of the migrant labor camp and the "Secondary Landfill" portion of the site. The purpose of this well is to determine if the treatment ponds were contributing constituents to groundwater. MW-5 is upgradient of the "Secondary Landfill" and represents background water quality conditions. MW-6 No general water quality parameter concentration limits were exceeded during the first semester 2013 sampling event. Harney Lane Sanitary Landfill 7 Department of Public Works/Solid Waste 1"Semester 2013 Groundwater Monitoring Report County of San Joaquin—July 15,2013