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TABLE 6 <br /> Unsaturated Zone Soil Pore Gas T014 Monitoring Results <br /> First Semester 2007 <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 0.1 0.9 19.9 1 160,000 Toluene <br /> 02 Single 0.0 1.1 11.7 5 390 Freon 12 <br /> Dichlorodifluoromethane <br /> 03 Single 0.0 4.5 15.4 6 160 Freon 12 <br /> Dichlorodifluoromethane <br /> 04 Single 0.0 6.3 5.4 5 160 Freon 12 <br /> Dichlorodifluoromethane <br /> i05 Single 0.0 1.1 19.8 1 1.8 Carbon Disulfide <br /> 06 Single 0.0 1.8 12.7 4 1500 Freon 12 <br /> Dichlorodifluoromethane <br /> 07 Single 0.0 0.8 20.0 4 33 Freon 12 <br /> Dichlorodifluoromethane <br /> 08 Single 0.0 1.0 19.3 2 800 Freon 12 <br /> Dichlorodifluoromethane <br /> 09 Single 0.0 0.9 20.1 1 16 1,4-Dioxane <br /> 10 Single 0.0 4.5 4.5 8 570 Freon 12 <br /> Dichlorodifluoromethane <br /> 11 Single 10.8 12.7 0.0 10 1000 Freon 12 <br /> Dichlorodifluoromethane <br /> 12 Shallow 0.0 0.6 20.7 NS NS NS <br /> Intermediate 0.0 0.5 20.8 NS NS NS <br /> Deep 0.0 0.7 20.4 NS NS NS <br /> T#1 Soil Gas 18.2 NS NS 7 700 Freon 12 <br /> Trench 41 Dichlorodifluoromethane <br /> TO-14 Sampling Date: March 8, 2007 by SCS Engineers <br /> Monitoring Probe Sampling Date for Methane, Carbon Dioxide, and Oxygen: March 8, 2007 and March 13, 2007. <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 16 Department of Public Works/Solid Waste <br /> 1'Semester Groundwater Monitoring County of San Joaquin-July 31,2007 <br />