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TABLE 5 <br />UNSATURATED ZONE SOIL PORE GAS T014 MONITORING RESULTS <br />PROBES SURROUNDING LANDFILL FOOTPRINT <br />NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL <br />SG <br />Soil Gas <br />Well Probe <br />Methane <br />Content <br />% <br />Carbon <br />Dioxide <br />% <br />Oxygen <br />% <br />Number of <br />Compounds <br />Highest <br />Concentration <br />Found PPB <br />v/v <br />VOC of Highest <br />Concentration <br />01 <br />Shallow <br />0.0 <br />0.3 <br />18.5 <br />4 <br />18 <br />Carbon Disulfide <br />Intermediate <br />0.0 <br />1.1 <br />16.5 <br />1 <br />1.7 <br />Freon 12 <br />Deep <br />0.0 <br />1.3 <br />16.2 <br />2 <br />5.7 <br />Acetone <br />02 <br />Shallow <br />0.0 <br />2.2 <br />15.6 <br />6 <br />37 '`. <br />Acetone <br />Intermediate <br />Deep <br />0 0 <br />0.0 <br />3 41 <br />1.6 <br />6,5 <br />14.2 <br />5 <br />4 <br />20 <br />14 <br />Freon 12 <br />Freon 12 <br />03 <br />Shallow <br />0.0 <br />0.8 <br />17.6 <br />3 <br />32 `-, <br />Acetone <br />Intermediate <br />,.,Deep <br />0.0 <br />0.917.0 <br />.,,:.. <br />15.6 _ <br />1 <br />.,.2 ,. <br />21 <br />1 ., ._ <br />7 <br />Acetone <br />Acetone <br />0.0 <br />1.4 <br />04 <br />Single <br />0.0 <br />0.0 <br />20.1 <br />3 <br />7.3 <br />Acetone <br />05 <br />Single <br />0.0 <br />2.2 <br />18.3 <br />6 <br />9.1 <br />Acetone <br />406 <br />Single <br />1.2 <br />26.1 <br />2.1 <br />19 <br />88 <br />1,4 -Dichlorobenzene <br />07 <br />Single <br />0.0 <br />2.0 <br />17.9 <br />2 <br />14 1 <br />Acetone <br />Note: Sampling protocol provides for sampling from the one probe at each well that is most likely to have the <br />highest VOC concentration. See Appendix J for major gasses composition at all soil gas probes <br />NS = <br />Not sampled <br />ND = <br />Not detected <br />TO -14 Sampling Date: July 28, 2008 by SCS Engineers <br />North County RC&SL Public Works/Solid Waste <br />2nd Semester and Annual 2008 Groundwater Monitoring 16 County of San Joaquin - January 31, 2009 <br />