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to oriveaasson banJoaquint:o. U.t.H.r. From:DayreL. Frary (805)872-8306 8r2M7 8:38:56 Page 2 of 2 <br /> i <br /> I <br /> i <br /> VILLAGE WEST MARINA August 28,1997 <br /> 6649 Embareadero Drive,Stocldon <br /> Estimated Mass Calculations for Gasoline Released into Possible Migratory Pathway <br /> by Two,10,000-gallon Capacity USTs. <br /> Possible pathway is depicted on Figures 5 and 6. <br /> Original estimated thickness of impacted interval=1.0±foot <br /> Approximate thiclmess of impacted interval after winter recharges <br /> to water table (see Figure 6): 3.0±feet <br /> Estimated surface area of possible gasoline migratory path (see Figure 5): 3200 square feet ,Y <br /> Estimated volume of impacted interval prior to nse of water table: 3200 cubic feet <br /> Estimated volume of impacted interval after winter recharge to water table: 9600 cubic feet <br /> Approximated bulk density of clayey silt: 841b./cu. ft. <br /> k <br /> Mean TPH-gasoline wricentration in MW-6 from 17-20 feet bag in path: 192 mglL <br /> Weight of one cubic foot of gasoline =6016.y 7 gallons of gasoline per cubic foot <br /> Weight estimate(in tons)of saturated soil in possible migratory path impacted by dissolved-phase gasoline: <br /> ((9600 of)(84 lb/cl)(1.92 in =774.1 <br /> 200016/ton <br /> Mass of estimated gasoline released by two 1 OK USTs(in total gallons)into the possible migratory path, <br /> 3200 c 1 1.9 ))_(60 We!) = 1228.8 _ <br /> 7 gal/cf <br /> 1 <br />