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Table 7 <br /> Fourth Quarter 2016 Total VOC Mass Estimation Calculations <br /> Austin Road Unit- Forward Landfill, Manteca California <br /> Contour Interval (ug/L) 1-25 25 -50 50-70.6 <br /> Average TVOC Concentration Within Interval (ug/L) 13.0 37.5 60.3 <br /> Aquifer Area Within Interval (ft2) 41,402,950 4,524,915 860,750 <br /> Aquifer Volume Within Interval(ft3) <br /> [Aquifer Area (ft2)x Thickness(40 ft)] 1,656,118,000 180,996,600 34,430,000 <br /> Aquifer Volume Within Interval (L) <br /> (28.317 L/ft3) 46,896,293,406 5,125,280,722 974,954,310 <br /> Groundwater Volume Within Interval (L) <br /> [Aquifer Volume (L)x Porosity(0.25)] 11,724,073,352 1,281,320,181 243,738,578 <br /> TVOC Mass Within Interval (kg) <br /> [Average TVOC Concentration (ug/L)x Groundwater <br /> Volume(L)/1,000,000,000 ug/kg] 152.4 48.0 14.7 <br /> Plume-Wide TVOC Mass(kg) <br /> [Sum of all Interval TVOC Masses] 215.2 <br /> Threshold Limit(kg) 789.5 <br />