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TABLE 4 <br /> Unsaturated Zone Soil Pore Gas T014 Monitoring Results <br /> Second Semester 2008 <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 N Found PPB <br /> v/v <br /> 01 Single NT NT NT 6 550 Toluene <br /> 02 Single 0.0 0.0 19.9 4 26 Acetone <br /> 03 Single 0.0 3.3 15.9 9 78 Freon 11, Freon 12 <br /> 04 Single 0.0 4.9 12.9 8 50 Acetone <br /> 05 Single 0.0 0.6 19.0 3 19 Acetone <br /> 06 Single 0.0 3.8 6.2 5 3000 Freon 12 <br /> 07 Single 0.0 0.3 19.0 10 79 Freon 12 <br /> 08 Single 0.0 0.5 18.5 12 260 Freon 12 <br /> 09 Single 0.0 0.3 19.8 5 22 Acetone <br /> 10 Single 0.0 2.8 11.9 13 230 Freon 12 <br /> 11 Single NT NT NT 13 420 Freon 12 <br /> T#1 Soil Gas NT NT NT 22 2300 Freon 12 <br /> Trench#1 <br /> TO-14 Sampling Date: July 29, 2008 by SCS Engineers <br /> Monitoring Probe Sampling Date for Methane, Carbon Dioxide, and Oxygen: July 29, 2008. <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 15 Department of Public Works/Solid Waste <br /> 2nd Semester and Annual 2008 Groundwater Monitoring County of San Joaquin—January 31,2009 <br />