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• <br /> TABLE M <br /> ESTIMATE OF TOTAL CHEMICAL MASS IN SOILS <br /> (BTEX and 1,2 DCA) <br /> Estimation of Residual H drocarbons in 40 foot diameter soil column beneath the former tank pit <br /> emits 01 Soil hoilResidual esu ua emica emica emica Residual <br /> Compound Volume(1) Weight (2) Weight (3) Chemical(4) Chemical Mass (5) Specific Density(7) Density(8) Chemical Mass(9) <br /> (cubic feet) (lbs) (kg) Concentration mg/kg) (m ) Gravy (lbs/gal) (m 1 al) (gallons) <br /> Benzene 50,265 5,076,765 2,302,805 00170 39147 693 0 879 7 292 3307801 691 00118 <br /> Toluene 50,265 5,076,765 2,302,805 00100 23028 055 0 867 7 196 3264129 372 00071 <br /> Xylenes 50,265 5,076,765 2,302,805 0 0450 103626 247 0 868 7 204 3267894 227 00317 <br /> thylbenzene 50,265 5,076,765 2,302,805 0 1300 299364 715 0 867 7 196 3264129 372 00917 <br /> 1,2 DCA(10) 1 50,265 5,076,765 2,302,805 0 0460 105929 053 1 250 10 375 4706068 875 00225 <br /> Notes TOTAL(gals) 0 1648 <br /> (1) Based on 40 foot diameter circle exisxtng from 32 to 72 feet below grade <br /> (2) Soil density mesured at 101 lbs per cubic foot(SECOR, September 30,1994) <br /> (3) Multiplied by conversion factor of (112 2046)kg/lb <br /> (4) Based on maximum detected residual concentration in soil boring and/or excavation confirmation soil sample as documented in Table B-1 <br /> (5) Average concentration multiplied by soil weight <br /> (6) Chemical specific gravity as published in handbook of Environmental Data On Organic Chemicals <br /> (7) Chemical specific gravity multiplied by density of water equal to 8 3 lbs/gal <br /> (8) Multiplied by conversion factor of 453,597 mg/lb <br /> (9) Residual chemical mass(mg)divided by the chemical density(mg/gal) <br /> (10) Concentration based on maximum detected in samples from SECOR boring SB-1 and/or excavation confirmation soil samples analyzed by WESTON <br />