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TABLE 4 <br /> Unsaturated Zone Soil Pore Gas TO-15 Monitoring Results <br /> Second Quarter 2014 <br /> Corral Hollow Landfill <br /> Soil Gas Methane Carbon Highest <br /> Oxygen Number of VOC of Highest <br /> Well Probe Content Dioxide Concentration <br /> GW- (%) (%) (%) Compounds Found PPB(v/v) Concentration <br /> 1 Shallow NS NS NS NS NS NS <br /> Middle NS NS NS NS NS NS <br /> Deep 0 .0.2 20.7 10 53 Acetone <br /> 2 Shallow NS NS NS NS NS NS <br /> Middle NS NS NS NS NS NS <br /> Deep 0 0.3 20.5 12 360 Freon 11 <br /> 3 Shallow NS NS NS NS NS NS <br /> Middle 0 0.3 20.4 17 130 Acetone <br /> Deep NS NS NS NS NS NS <br /> 4 Shallow NS NS NS NS NS NS <br /> Middle 0 0.1 19.0 7 200 Freon 11 <br /> Deep NS NS NS NS NS NS <br /> 5 Shallow 0 0.6 20.4 7 130 Acetone <br /> Middle NS NS NS NS NS NS <br /> Deep NS NS NS NS NS NS <br /> 6 Shallow NS NS NS NS NS NS <br /> Middle NS NS NS NS NS NS <br /> 1Deep 0 6.0 13.7 7 7800 Freon 12 <br /> 7 Shallow 0 1.0 19.8 8 79 Acetone <br /> Middle 0 12.9 3.8 10 130 Acetone <br /> 8 Shallow NS NS NS NS NS NS <br /> Deep 0 0.5 20.5 12 110 Acetone <br /> 9 Shallow NS NS NS NS NS NS <br /> Middle NS NS NS NS NS NS <br /> 1 Deep 1 0 1 3.8 115.9 18 88 Acetone <br /> E=Exceeds instrument calibration range. (None found this sampling period.) <br /> 1 TO-15 Sampling Date:April 25,2014 by SCS Engineers <br /> Note: Sampling locations were established in 2006,with VOC samples taken from one probe at each well location, <br /> most likely to have the highest VOC concentration. This probe continues to be sampled thereafter. <br /> NS=Not sampled,not selected for TO-15 monitoring <br /> NR=Not Reported <br /> Corral Hollow Sanitary Landfill 25 Department of Public Works/Solid Waste <br /> 2°d Quarter 2014 Groundwater Monitoring County of San Joaquin—July 15,2014 <br />