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TABLE 3 <br /> UNSATURATED ZONE SOIL PORE GAS TO-15 MONITORING RESULTS <br /> THIRD QUARTER 2013 <br /> HARNEY LANE SANITARY LANDFILL <br /> Soil Gas Methane Carbon Highest <br /> Well Probe Content Dioxide Oxygen Number of Concentration VOC of Highest <br /> GW_ (%) (%) (%) Compounds Found PPB Concentration <br /> v/v <br /> 9 Middle 0 1.6 20.5 9 15 Tetrahydrofuran <br /> 10 Deep 0 5.4 16.4 14 41 Tetrahydrofuran <br /> East Header NR NR NR 28 1500 Ethyl Benzene <br /> West Header NR NR NR 29 14000 Toluene <br /> E= Exceeds instrument calibration range. (None found this sampling period.) <br /> TO-15 Sampling Date: August 2, 2013 by SCS Engineers <br /> Monitoring Probe Sampling Date for Methane, Carbon Dioxide, and Oxygen: August 2,2013 by LFG System <br /> Header Data: August 2, 2013. <br /> Note: Sampling protocol for the 2006 VOC samples required sampling from one probe at each well location, most <br /> likely to have the highest VOC concentration. This probe continues to be sampled thereafter. <br /> See Appendix J for gas composition at all soil gas probes <br /> NR = Not Reported <br /> Harney Lane Sanitary Landfill Department of Public Works/Solid Waste <br /> 2"'Semester and Annual 2013 Groundwater Monitoring Report County of San Joaquin—January 31,2014 <br />