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s <br /> 305 S. HUTCHINS ST FET <br /> LOUI,CA ai. <br /> CONCLUSIONS RELATIVE TO CA�t SE MOSURE <br /> The Inst generation of underground fuel tanks and linis(fuel:leak source)was <br /> removed by Texaco in 1979(I7 years ago), Biotic and abiotic degcadatan and <br /> atterniation processeshave been at work...since then to,reduce fuel"hydrocarbon <br /> concentrations in soil and ground water.. <br /> Fuel hydrocarbonocontaminated soil exists between 83 and 14 5 feet above the <br /> saturated.;zone. This separation is taken as evidence that leaching to the water table <br /> has not occurred. With its overestimation of infiltratl9k SESOIL estimates only a <br /> 11 <br /> brief, trioderate increase in ground-water benzene concentration, if leaching of benzene. <br /> Bally occum, <br /> io No septi ate phase fuel hydrocarbons have been,obs"d in soil or ground water:. <br /> • The region of greatest fuel hydrocarbon contamination' of soil has been:retnnediated, <br /> •: The fuel hydrocarbon-contaminated soil zs largely bel,64 20 ft bgs. Tlns soil is deep <br /> enough not to have an adverse effect on.1 the health ofpersons,at the surface.. <br /> rt <br /> i1 <br /> • The nearest active water supply.well(City of Lodi Well 3R) has not been affected by <br /> fuel hydrocarbon contamination, Therefore the local beneficial use has not been <br /> adversely affected, <br /> • The record of ground-water sample analyses indicates';that the ground-water plume is <br /> stable and not growing. <br /> Health; the environment, and beneficial use are not being adversely affected 77wrefore <br /> it is appropriate to allow passive bioremediation to continue to reduce fuel hydrocarbon <br /> concentrations in soil and ground water at this site. Condititsnal Parse closure is the <br /> appropriate&vositionfor this site at this time. ' <br /> 1 <br /> _a <br /> i <br /> 1; <br /> :3 <br /> y <br /> C1 <br />