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® TABLE 5 <br /> Unsaturated Zone Soil Pore Gas T015 Monitoring Results <br /> Second 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 0.5 0.4 18.5 4 36000 Toluene <br /> 02 Single 0 0.3 20.2 3 38 Freon 12 <br /> 03 Single 0 1.6 18.7 5 60 Freon 12 <br /> 04 Single 0 3.9 16.1 5 44 Freon 12 <br /> 05 Single 0 0.5 19.8 4 1.2 Freon 12, m.p- <br /> X lene <br /> 06 Sin le 0 2.3 17.7 5 290 Freon 12 <br /> 07 Sin le 0 0.4 19.6 5 74 Freon 12, Freon 11 <br /> 09 Single 0 0.4 19.7 1 0.97 M, -X leve <br /> 10 Single 0 3 13.1 5 510 Freon 12 <br /> 11 1 Sin le 0 7.9 12.7 6 240 Freon 12 <br /> TO-15 Sampling Date: August 7, 2012 by SCS Engineers <br /> Monitoring Probe Sampling Date for Methane, Carbon Dioxide, and Oxygen: August 7, 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 17 Department of Public Works/Solid Waste <br /> 2"d Semester and Annual 2012 Groundwater Monitoring County of San Joaquin—January 15,2013 <br />