|
Table 9
<br />Second Quarter 2025 TVOC Mass Estimations Calculations
<br />2025 Annual Corrective Action Evaluation Report
<br />Forward Landfill
<br />9999 South Austin Road, San Joaquin County, California
<br />Contour Interval (µg/L)1 - 25 25 - 50 50 - 75 75 - 100 100 - 102.3
<br />Average TVOC Concentration Within Interval (µg/L)12.5 37.5 62.5 87.5 101.2
<br />Unadjusted Aquifer Area Within Interval (ft2)36,008,904 1,298,267 209,837 28,147 15,582
<br />Additional Unadjusted Aquifer Area Within Interval (ft2)1,136,437 0 0 0 0
<br />Total Unadjusted Aquifer Area Within Interval (ft2)37,145,341 1,298,267 209,837 28,147 15,582
<br />Excluded Aquifer Area Within Interval (ft2)1,298,267 209,837 28,147 15,582 0
<br />Additional Excluded Aquifer Area Within Interval (ft2)0 0 0 0 0
<br />Total Excluded Aquifer Area Within Interval (ft2)1,298,267 209,837 28,147 15,582 0
<br />Total Adjusted Aquifer Area Within Interval (ft2)35,847,074 1,088,430 181,690 12,565 15,582
<br />Aquifer Volume Within Interval (ft3)
<br />[Aquifer Area (ft2) x Thickness (40 ft)]1,433,882,960 43,537,200 7,267,600 502,600 623,280
<br />Aquifer Volume Within Interval (L)
<br />(28.317 L/ft3)40,603,263,778 1,232,842,892 205,796,629 14,232,124 17,649,420
<br />Groundwater Volume Within Interval (L)
<br />[Aquifer Volume (L) x Porosity (0.25)]10,150,815,945 308,210,723 51,449,157 3,558,031 4,412,355
<br />TVOC Mass Within Interval (kg)
<br />[Average TVOC Concentration (µg/L) x Groundwater
<br />Volume (L)/1,000,000,000 µg/kg]
<br />126.9 11.6 3.2 0.3 0.4
<br />Plume-Wide TVOC Mass (kg)
<br />[Sum of all Interval TVOC Masses]
<br />Threshold Limit (kg)
<br />Acronyms and Abbreviations:
<br />µg/kg = microgram per kilogram
<br />µg/L = microgram per liter
<br />ft = feet
<br />ft2 = square feet
<br />ft3 = cubic feet
<br />kg = kilogram
<br />L = liter
<br />L/ft3 = liter per cubic foot
<br />TVOC = total volatile organic compound
<br />142.4
<br />789.5
<br />1/1
|