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Table 6
<br />Third Quarter 2024 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 - 120.6
<br />Average TVOC Concentration Within Interval (µg/L)12.5 37.5 62.5 87.5 110.3
<br />Unadjusted Aquifer Area Within Interval (ft2)37,875,377 1,055,187 220,521 19,140 10,239
<br />Additional Unadjusted Aquifer Area Within Interval (ft2)309,661 0 0 0 0
<br />Total Unadjusted Aquifer Area Within Interval (ft2)38,185,038 1,055,187 220,521 19,140 10,239
<br />Excluded Aquifer Area Within Interval (ft2)1,055,187 220,521 19,140 10,239 0
<br />Additional Excluded Aquifer Area Within Interval (ft2)0 0 0 0 0
<br />Total Excluded Aquifer Area Within Interval (ft2)1,055,187 220,521 19,140 10,239 0
<br />Total Adjusted Aquifer Area Within Interval (ft2)37,129,851 834,666 201,381 8,901 10,239
<br />Aquifer Volume Within Interval (ft3)
<br />[Aquifer Area (ft2) x Thickness (40 ft)]1,485,194,040 33,386,640 8,055,240 356,040 409,560
<br />Aquifer Volume Within Interval (L)
<br />(28.317 L/ft3)42,056,239,631 945,409,485 228,100,231 10,081,985 11,597,511
<br />Groundwater Volume Within Interval (L)
<br />[Aquifer Volume (L) x Porosity (0.25)]10,514,059,908 236,352,371 57,025,058 2,520,496 2,899,378
<br />TVOC Mass Within Interval (kg)
<br />[Average TVOC Concentration (µg/L) x Groundwater
<br />Volume (L)/1,000,000,000 µg/kg]
<br />131.4 8.9 3.6 0.2 0.3
<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 />144.4
<br />789.5
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