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TABLE 6 <br /> Unsaturated Zone Soil Pore Gas T015 Monitoring Results <br /> First Semester 2012 <br /> Foothill Sanitary Landfill <br /> SG Soil Gas Methane Carbon Oxygen Number of Highest VOC of Highest <br /> Well Probe Content Dioxide (%) Compounds Concentration Concentration <br /> Found PPB <br /> v/v <br /> 01 Single 0.4 0.4 18.4 4 71000 Toluene <br /> 02 Single 0 0.2 20.3 4 700 Freon 12 <br /> 03 Single 0 2.2 18.5 11 120 Freon 12 <br /> 04 Single 0 1.9 18.9 7 180 Freon 12 <br /> 05 Single 0 0.7 19.4 1 1.5 Freon 12 <br /> 06 Single 0 2.5 18.0 5 740 Freon 12 <br /> 07 Single 0 0.6 19.6 4 90 Freon 12 <br /> 09 Single 0 0.5 20 0 NA NA <br /> Am 10 Single 0 2.8 14.2 8 1000 Freon 12 <br /> 11 Single 0 7.2 13.3 11 620 Freon 12 <br /> TO-15 Sampling Date: April 12, 2012 by SCS Engineers <br /> Monitoring Probe Sampling Date for Methane, Carbon Dioxide, and Oxygen: June 25, 2012. <br /> Note: Sampling protocol provides for sampling from the one probe at each well that most likely to have the <br /> highest VOC concentration. See Appendix J for major gasses composition at all soil gas probes <br /> NS = Not sampled <br /> ND = Not detected <br /> Foothill Sanitary Landfill 20 Department of Public Works/Solid Waste <br /> 1"Semester 2012 Groundwater Monitoring County of San Joaquin—July 17,2012 <br />