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0 0 0 <br />Table 7 <br />Fourth Quarter 2015 Total VOC Mass Estimation Calculations <br />Austin Road Unit - Forward Landfill, Manteca California <br />Contour Interval (ug/L) <br />1-25 <br />25-50 <br />50-65.98 <br />Average TVOC Concentration Within Interval (ug/L) <br />13.0 <br />37.5 <br />57.99 <br />Aquifer Area Within Interval (ft2) <br />41,511,255 <br />2,703,225 <br />387,105 <br />Aquifer Volume Within Interval (ft3) <br />[Aquifer Area (ft2) x Thickness (40 ft)] <br />1,660,450,200 <br />108,129,000 <br />15,484,200 <br />Aquifer Volume Within Interval (L) <br />(28.317 L/ft3) <br />47,018,968,313 <br />3,061,888,893 <br />438,466,091 <br />Groundwater Volume Within Interval (L) <br />[Aquifer Volume (L) x Porosity (0.25)] <br />11,754,742,078 <br />765,472,223 <br />109,616,523 <br />TVOC Mass Within Interval (kg) <br />[Average TVOC Concentration (ug/L) x Groundwater <br />Volume (L)/1,000,000,000 ug/kg] <br />152.8 <br />28.7 <br />6.4 <br />Plume -Wide TVOC Mass (kg) <br />[Sum of all Interval TVOC Masses] <br />187.9 <br />Threshold Limit (kg) <br />789.5 <br />