ARCHIVED REPORTS XR0001794 - Laserfiche WebLink

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Station No. 502, 35 N. Cherokee Lane, Lodi , - Interim Remediation Plan DESCRIPTION OF REMEDIATION SYSTEM iEVAX will re-instate operation of the existing VES (Figure 1) to remove hydrocarbon contamination from the soil . The fuel residuals will be volatilized and extracted from the soil by a high volume vacuum pump The vapors will be abated prior to discharge into the atmosphere. A typical remediation system using a catalytic incinerator is shown in Figure 2 of Appendix A. Vapor Extraction Wells Soil vapor extraction will be re-instated from existing onsite vapor recovery and monitoring wel 1 s VW-5, VW-6, VW-7, VW-9, MW-2 and MW-4. A vacuum will be applied to each well to volatilize hydrocarbon products in ' the soil . The soil gas will flow from the soil through the screened interval of the monitoring wells. Underground Piping The extracted soil gases will be transported through existing underground pipes connecting each well to a common manifold. At the manifold, the individual pipes are merged into a single common trunkline destined for the incinerator. Manifold Box The manifold box consists of various valves and sampling ports that control individual extraction points. The valves located in the manifold box will be either open or closed, depending on whether or not an extraction point is to be utilized. This will expedite the remedial effort and minimize the cost per pound of hydrocarbon abatement. Water Accumulator Moisture extracted from the soil must be removed from the air stream before entering the vacuum pump. The moisture will be accumulated in a 55-gallon drum which will serve as a water trap upstream of the pump. The water will be stored in DOT approved drums and then hauled to a proper disposal facility. Dilution Valve An ambient dilution valve will be located on the water accumulator barrel . This valve will be under negative pressure and will allow for the introduction of ambient air to reduce the concentration of the influent to a level that will not overheat the catalyst bed. - 4 -