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0 10 <br />Table 7 <br />Fourth Quarter 2014 Total Volatile Organic Compound Mass Estimation Calculations <br />Austin Road Unit - Forward Landfill - Manteca, California <br />Contour Interval (ug/L) <br />1-25 <br />25-47.84 <br />Average TVOC Concentration Within Interval (ug/L) <br />13.00 <br />36.42 <br />Aquifer Area Within Interval (ft) <br />5,441,675 <br />365,755 <br />Aquifer Volume Within Interval (ft) <br />[Aquifer Area (ft)x Thickness (40 ft)] <br />217, 667, 000 <br />14, 63 0,186 <br />Aquifer Volume Within Interval (L) <br />[28.317 L/ft3] <br />6,163,676,439 <br />414,282,977 <br />Groundwater Volume Within Interval (L) <br />[Aquifer Volume (L) x Porosity (0.25)] <br />1,540,919,110 <br />103,570,744 <br />TVOC Mass Within Interval (kg) <br />[Average TVOC Concentration (ug/L) x Groundwater <br />20.03 <br />3.77 <br />Volume (L) / 1,000,000,000 ug/kg] <br />Plume -Wide TVOC Mass (kg) <br />[Sum of All Interval TVOC Masses] <br />23.80 <br />Threshold Limit (kg) <br />789.5 <br />Notes: <br />Aquifer areas dervived from Figure 2. <br />