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TABLE 5 <br /> Unsaturated Zone Soil Pore Gas T015 Monitoring Results <br /> Second Semester 2013 <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 /> (%) N Found PPB <br /> V/v <br /> 01 Single 0 0 20.6 3 620 Toluene <br /> 02 Single 0 0.1 20.4 4 15 Acetone <br /> 03 Single 0 0.1 20.4 4 48 Freon 12 <br /> 04 Single 0 2.6 17.4 5 25 Freon 12 <br /> 05 Single 0 0.7 19.6 2 18 Acetone <br /> 06 Single 0 2.1 19.1 4 68 Freon 12 <br /> 07 Single 0.1 0.5 20.5 3 41 Freon 11 <br /> 09 Single 0.1 0.4 20.9 1 81 Ethanol <br /> 10 Single 0.1 3.9 11.7 6 500 Freon 12 <br /> 11 Single 0 7.9 11.8 5 86 Freon 12 <br /> TO-15 Sampling Date: September 11, 2013 by SCS Engineers <br /> Monitoring Probe Sampling Date for Methane, Carbon Dioxide, and Oxygen: September 11, 2013. <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 /> 2"d Semester and Annual 2013 Groundwater Monitoring County of San Joaquin—January 31,2014 <br />