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0 0 0 <br />Table 9 <br />Second Quarter 2015 Total Volatile Organic Compound Mass Estimation Calculations <br />Austin Road Unit- Forward Landfill - Manteca, California <br />Contour Interval (ug/L) <br />1-25 <br />25-44.15 <br />Average TVOC Concentration Within Interval (ug/L) <br />13.00 <br />34.58 <br />Aquifer Area Within Interval (ft) <br />4,829,150 <br />365,755 <br />Aquifer Volume Within Interval (ft) <br />[Aquifer Area (ft)x Thickness (40 ft)] <br />193,166, 000 <br />14, 630, 200 <br />Aquifer Volume Within Interval (L) <br />[28.317 L/ft3] <br />5,469,881,622 <br />414,283,373 <br />Groundwater Volume Within Interval (L) <br />[Aquifer Volume (L) x Porosity (0.25)] <br />1,367,470,406 <br />103,570,843 <br />TVOC Mass Within Interval (kg) <br />[Average TVOC Concentration (ug/L) x Groundwater <br />17.78 <br />3.58 <br />Volume (L) / 1,000,000,000 ug/kg] <br />Plume -Wide TVOC Mass (kg) <br />[Sum of All Interval TVOC Masses] <br />21.36 <br />Threshold Limit (kg) <br />789.5 <br />Notes: <br />Aquifer areas dervived from Figure 4. <br />