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r <br /> 04 September 2007 <br /> AGE-NC Project No. 95-0121 <br /> Page 2 of 2 <br /> Cylindrical volumetric concentrations were averaged from 7 soil sample results collected <br /> from 30 feet bsg to 100 feet bsg from sample points CPT-2 and MW40 which was <br /> calculated as : <br /> 22. 6 mg/kg / 7 samples = average 3. 3 mg/kg <br /> The weight (wt) of PHI-soil can be calculated by: <br /> Where: lb/ft' = pounds per cubic foot and C = concentration of gasoline (TPH-g) in soil in mg/kg <br /> (wt gasoline)r,�, = 125 lb/fl• V,��, • C : <br /> wt gasoline)r , 125 Ib/fl• 156,000 fi• 362 . 4 mg/kg <br /> = 73073 lb gasoline <br /> (wt gasoline),,, = 125 lb/ft• V�,, • C <br /> (wt gasoline),,, = 125 lb/ft' • 87,965 ft' • 3 .3 mg/kg <br /> = 3 . 64 lb gasoline <br /> (wt gasoline),,,, + (wt gasoline),y, = total weight of gasoline <br /> I <br /> 7,073 Ib gasoline + 3 .64 lb gasoline = 7,076.64 total Ib gasoline <br /> Total Mass of TPH-e remaining at site <br /> 7 073 Ib TPH- + 3. 64 lb TPH- = 7 076.64 lb TPH- <br /> , c s s <br /> Total Volume of TPH-g remaining at site <br /> 7,076. 64 Ib TPH-g / 6. 25 lb/gal = 1,132 gallons <br /> Advanced Geo6nvironmental, Inc. <br />