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GASOLINE <br /> CALCULATION OF MASS AND VOLUME OF RESIDUAL GASOLINE <br /> CHEROKEE SERVICE CENTER, 303 SOUTH CHEROKEE LANE <br /> LODI, CALIFORNIA <br /> Assumptions: <br /> Source of PPCs from product piping at the location of Sample 3. <br /> Attenuation is linear in any one direction ay from the source <br /> Greatest concentration of PPCs below source at approximate depth of product piping (2 feet BSG). <br /> Shape of the iso-concentration line is an inverted cone of the relative dimensions indicated in Drawing 2. <br /> Analytical results for boring B-1 at 35 feet represent maximum PPC concentrations at 35 feet BSG. <br /> NOTE: Depths measured from below the source at 2 feet BSG <br /> Gasoline <br /> Conc. Depth Attenuation <br /> mg/kg feet BSG ppm/ft Depth (d) Radius(r) Conc Volume Volume Cone shell lbs gasoline <br /> see note ppm Cone (ft-3 Cone shell mass(Ibs) <br /> 748 2 0.5 0.1665 737 0.014515 0.014508 1.61 0.00 <br /> 1 0.333 725.28333 0.116123 0.101607 11.29 0.01 <br /> 680 5 1.5 0.4995 713.96667 0.391914 0.275791 30.64 0.02 <br /> 1 35 22.63333 2 0.666 702.65 0.928982 0.537067 59.67 0.04 <br /> 2.5 0.8325 691.33333 1.814417 0.885436 98.38 0.07 <br /> 3 0.999 680.01667 3.135313 1.320896 146.76 0.10 <br /> 3.5 1.1655 668.7 4.97876 1.843448 204.83 0.14 <br /> 4 1.332 657.38333 7.431852 2.453092 272.56 0.18 <br /> 4.5 1.4985 646.06667 10.58168 3.149828 349.98 0.23 <br /> 5 1.665 634.75 14.51534 3.933656 437.07 0.28 <br /> 5.5 1.8315 623.43333 19.31991 4.804576 533.84 0.33 <br /> 6 1.998 612.11667 25.0825 5.7625881 640.2810.39 <br /> 6.5 2.16451 600.8 31.89019 6.8076931 756.401 0.45 <br /> Page 1 <br />