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Table 7
<br />Fourth Quarter 2022 Total VOC Mass Calculations
<br />Austin Road Unit
<br />Forward Landfill, Manteca, California
<br />Contour Interval (ug/L)1-25 25-50 50-56.3
<br />Average TVOC Concentration Within Interval (ug/L)12.5 37.5 53.2
<br />Unadjusted Aquifer Area Within Interval (ft2)28,766,531 4,747,469 825,190
<br />Additional Unadjusted Aquifer Area Within Interval (ft2)88,813 0 0
<br />Total Unadjusted Aquifer Area Within Interval (ft2)28,855,344 4,747,469 825,190
<br />Excluded Aquifer Area Within Interval (ft2)4,747,469 825,190 0
<br />Additional Excluded Aquifer Area Within Interval (ft2)0 0 0
<br />Total Excluded Aquifer Area Within Interval (ft2)4,747,469 825,190 0
<br />Total Adjusted Aquifer Area Within Interval (ft2)24,107,875 3,922,279 825,190
<br />Aquifer Volume Within Interval (ft3)
<br />[Aquifer Area (ft2) x Thickness (40 ft)]964,315,000 156,891,160 33,007,600
<br />Aquifer Volume Within Interval (L)
<br />(28.317 L/ft3)27,306,507,855 4,442,686,978 934,676,209
<br />Groundwater Volume Within Interval (L)
<br />[Aquifer Volume (L) x Porosity (0.25)]6,826,626,964 1,110,671,744 233,669,052
<br />TVOC Mass Within Interval (kg)
<br />[Average TVOC Concentration (ug/L) x Groundwater Volume
<br />(L)/1,000,000,000 ug/kg]
<br />85.0 41.7 12.4
<br />Plume-Wide TVOC Mass (kg)
<br />[Sum of all Interval TVOC Masses]
<br />Threshold Limit (kg)
<br />139.1
<br />789.5
<br />Annual Cap Tables_2023_0801 19/25
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