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i <br /> ffi;­ N:1­111.MN _ <br /> F <br /> Station No. 502, 35 N. Cherokee Lane, Lodi, - Interim Remediation Plan <br /> v. <br /> a <br /> DESCRIPTION OF REMEDIATION SYSTEM <br /> EVAX will re-instate operation of the existing YES (Figure I) to remove <br /> hydrocarbon contamination from the soil. The fuel residuals <br /> volatilized and extracted from the soil b will. pbe <br /> . <br /> The vapors will be abated Y a high volume vacuum pump, <br /> typical remediation system prior <br /> g a catalytic incinerator atorthe z�spshriv 1A <br /> Figure 2 of Appendix A. n <br /> Vapor Extraction Wells <br /> Soil vapor extractioq will be re-instated from existing onsite vapor <br /> _. recovery and mogitoriny wells VW-5, YW-6, VW-7 VW-9 <br /> vacuum will ba applied to each well to volatilize hydrocarbon pro2 and d cts in <br /> the sn_il. The soil gas will flow from the soil through the screened <br /> w <br /> in of the monitoring wells. <br /> Underground Piping <br /> The extracted soil gases will be transported through existing underground <br /> pipes connecting eack well to a common manifold. At the manifold, ' the <br /> r individual pipes are merged into a single common true kline destined for <br /> the incinerator. <br /> Manifold Box <br /> The manifold box consists of various valves and sampling <br /> control individual extraction points. The valves locateintparts <br /> e m nifold <br /> box will be either open or closed, depending on whether or not an <br /> extraction point is to be utilized. This will expedite the remedial <br /> effort and minimize the cost per pound of hydrocarbon abatement. <br /> Water Accumulator <br /> Moisture extracted from the soil must be removed from the air stream <br /> � before entering the vacuum um <br /> 55-gallon drum which .will serve as The <br /> wateru tra will be accumulated 1n a <br /> The water will be stored in DOT approved drums andream of the then hauled pump. <br /> r proper disposal facility. to a <br /> Dilution Valve <br /> An ambient dilution valve will be located on €. -water -accumulator--. - -- ---- <br /> _ barrel.-._ This__valve-will--be--under negative pressure and will allow for <br /> the <br /> introduction of .ambient .sir to reduce the concentration of the <br /> influent to a level that will. not overheat the catalyst bed, <br /> �.« <br /> „� - 4 - <br />