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y <br /> t <br /> APPENDIX F <br /> VOLUME/MASS ASSUMPTIONS AND CALCULATIONS <br /> HYDROCARBON-IMPACTED SOIL(GASOLINE) <br /> VOLUME ASSUMPTIONS AND CALCULATIONS <br /> STRONG PROPERTY °$ <br /> 5157 West Business Loop 205, Tracy, CA <br /> Volume of impacted soil-prior to soil remediation :. <br /> E <br /> An estimate of the areal extent of impacted soil surrounding the former UST area is made from <br /> samples collected from borings B 1 through B7 and wells MW 1 Viand MW 12. <br /> The distribution of adsorbed hydrocarbon concentrations on the site.'can be approximated by an <br /> ellipse with an area of approximately 8,000 ft'. The vertical distribution of the impacted soil was <br /> documented to be approximately between 10 feet and 15 feet below surface grade(bsg).This volume <br /> was calculated from soil sample data. <br /> f _ <br /> A, = 8,000 ft' <br /> c ' <br /> V�=Ae •h 7� 8,000 fh • 5 ft 40,000 ft3 /27 ft-/yd' = 1,481 yd3 <br /> Converting 1,481 yd' to cm3 – 1,481 yd • 7.6455 x 105 cm3/yd3z 1:13 x 109 cm3 <br /> yields approximately 1.13 x 10' cm3. Using 1.5 g/cm3 as the weight`of soil, the .total weight of <br /> contaminated soil is approximately 1.70 x 109 grams. <br /> Calculating an avera a concentration from s les collected from depths of 10 feet bsg to <br /> I 15 feet bsg,a value o 00 milligrams per kilogram as the"average oncentration oftotal petrolc <br /> hydrocarbons quanti ie as gaso me, ase of <br /> This value will be used for soils in the calcul <br /> I p� <br /> weight of soil • average concentration 41.7( %.�V4i�ae�'' .1 L� t� <br /> _ G . I A-:0 rl <br /> =340,000 g of gasoline or 340 kg or , ( sN�f31Q- ,�e <br /> — — f <br /> ? w�csu <br /> 6.25 lb/gal - 20 g=279 lb asolin 1al asolin :. — <br /> "0 <br /> �.z.s <br />