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TABLE 4 <br /> Unsaturated Zone Soil Pore Gas T014 Monitoring Results <br /> Second Quarter 2007 <br /> Corral Hollow Landfill <br /> GW Soil Methane Carbon Oxygen Number of Highest VOC of Highest <br /> Gas Content Dioxide (%) Compounds Concentration Concentration <br /> Well M N Found PPB <br /> Probe v/v <br /> 1 Shallow 0.0 0.6 20.2 10 1300 2-Propanol <br /> Middle 0.0 10.5 9.7 NS NS NS <br /> Deep 0.0 0.9 20.1 NS NS NS <br /> 2 Shallow 0.0 0.9 20.2 12 1300 Freon 11 <br /> fluorotrichloromethane <br /> Middle 0.0 2.6 19.7 NS NS NS <br /> Deep 0.0 4.2 18.2 NS NS NS <br /> 3 Shallow 0.0 0.5 20.2 12 900 2-Propanol <br /> Middle 0.0 3.6 18.9 NS NS NS <br /> Deep 0.0 2.2 19.5 NS NS NS <br /> 4 Shallow 0.0 0.2 20.3 6 1600 2-Propanol <br /> Middle 0.0 0.0 17.6 NS NS NS <br /> Deep 0.0 0.0 20.7 NS NS NS <br /> 5 Shallow 0.0 1.3 20.0 7 1800 Freon 11 <br /> fluorotrichloromethane <br /> Middle 0.0 1.5 19.9 NS NS NS <br /> Deep 0.0 1.2 20.1 NS NS NS <br /> 6 Shallow 0.0 1.6 19.9 8 22000 Freon 12 <br /> Dichlorodifluoromethane <br /> Middle 0.0 7.2 11.8 NS NS NS <br /> Deep 0.0 12.3 5.0 NS NS NS <br /> 7 Shallow 0.0 0.8 19.9 NR NR NR <br /> Middle 0.0 7.2 1.9 4 500 2-Propanol <br /> TO-14 Sampling Date: February 26, 2007 by SCS Engineers <br /> MonitoringProbe Sampling Date for Methane, Carbon Dioxide, and Oxygen: April 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 /> Corral Hollow Landfill 15 Department of Public Works/Solid Waste <br /> 2nd Quarter 2007 Groundwater Monitoring County of San Joaquin-July 31,2007 <br />