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• <br /> Table 6 <br /> Third Quarter 2016 Total VOC Mass Estimation Calculations <br /> Austin Road Unit- Forward Landfill, Manteca California <br /> Contour Interval (ug/L) 1-25 25-50 50-75 75-79.60 <br /> Average TVOC Concentration Within Interval (ug/L) 13.0 37.5 62.5 77.3 <br /> Aquifer Area Within Interval (ft2) 38,175,660 14,602,275 2,459,140 27,570 <br /> Aquifer Volume Within Interval (ft3) <br /> [Aquifer Area (ft2)x Thickness(40 ft)] 1,527,026,400 584,091,000 98,365,600 1,102,800 <br /> Aquifer Volume Within Interval (L) <br /> (28.317 L/ft3) 43,240,806,569 16,539,704,847 2,785,418,695 31,227,988 <br /> Groundwater Volume Within Interval (L) <br /> [Aquifer Volume (L)x Porosity(0.25)] 10,810,201,642 4,134,926,212 696,354,674 7,806,997 <br /> TVOC Mass Within Interval (kg) <br /> [Average TVOC Concentration (ug/L)x Groundwater <br /> Volume (L)/1,000,000,000 ug/kg] 140.5 155.1 43.5 0.6 <br /> Plume-Wide TVOC Mass(kg) <br /> [Sum of all Interval TVOC Masses] 339.7 <br /> Threshold Limit(kg) 789.5 <br />