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Unsaturated Zone Soil Pore Gas TO -14 Monitoring Results <br />Fourth Quarter 2013 <br />Soil Gas <br />Well Probe <br />GW- <br />Methane <br />Content <br />(oho) <br />Carbon <br />Dioxide <br />(oho) <br />Oxygen <br />N) <br />Number of <br />Compounds <br />Highest <br />Concentration <br />Found PPB (v/v) <br />VOC of Highest <br />Concentration <br />1 Shallow <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Middle <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Deep <br />0 <br />1.5 <br />19.9 <br />12 <br />86 <br />Freon 11 <br />2 Shallow <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Middle <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Deep <br />0 <br />2.7 <br />20.2 <br />13 <br />280 <br />Freon 11 <br />3 Shallow <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Middle <br />0 <br />0.7 <br />20.9 <br />16 <br />43 <br />Trichloroethene <br />Deep <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />4 Shallow <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Middle <br />0 <br />0.3 <br />19.3 <br />5 <br />180 <br />Freon 11 <br />Deep <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />5 Shallow <br />0 <br />0.8 <br />20.7 <br />6 <br />33 <br />Freon 11 <br />Middle <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Deep <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />6 Shallow <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Middle <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />Deep <br />0 <br />6.6 <br />11.8 <br />6 <br />5000 <br />Freon 12 <br />7 Shallow <br />0 <br />1.3 <br />20.2 <br />9 <br />13 <br />Freon 11 <br />Middle <br />0 <br />12 <br />9.4 1 <br />14 <br />90 <br />Freon 12 <br />E = Exceeds instrument calibration range. (None found this sampling period.) <br />TO -15 Sampling Date: October 25, 2013 by SCS Engineers <br />Note: Sampling locations were established in 2006, with VOC samples taken from one probe at each well <br />location, most likely to have the highest VOC concentration. This probe continues to be sampled <br />thereafter. <br />See Appendix J for gas composition at all soil gas probes <br />NS = Not sampled, not selected for TO -15 monitoring <br />NR = Not Reported <br />Corral Hollow Sanitary Landfill 26 Department of Public Works/Solid Waste <br />4ch Quarter and Annual 2013 Groundwater Monitoring County of San Joaquin — January 15, 2014 <br />