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Estimatcd Closure Costs <br /> Facility — Wastewater Pretreatment System covered by permit (Conditionally <br /> authorized — CA) <br /> Treatment Provided: <br /> 1. Oil Removal --API Separator. <br /> 2. Neutralization —mix tanks, mixers, pH probes, chemical metering pumps. <br /> 3. General —wastewater storage tanks, pumps, piping. <br /> Closure Procedure <br /> Normal operation, of the system results in empty tanks at the end of each <br /> processing day (i.e. wastes are not accumulated, they are processed daily and <br /> hence removed from the system). Thus closure can be achieved simply by <br /> cleaning the tanks, piping and pumps, and, since they are all useful process <br /> items, leaving the equipment in place. The tanks are all cross Iinked <br /> polyethylene, the piping is PVC and the pumps are plastic or metallic.None <br /> of the equipment will absorb any contaminants ;From the wastewater. CaTeful <br /> rinsing and cleaning will result in fully decontaminated equipment, suitable <br /> for use in a number of outer processing applications. Therefore, proceed as <br /> follows <br /> 1. Process all wastewawr through the system to the sewer if not already <br /> dare. Time allowed— 1 loan day= S man hours. <br /> 2. Empty the caustic and acid storage tanks to trailers and transfer to uses <br /> elsewhere. Triple rinse the tanks, neutralize the rinse water. Fst.imated time <br /> required— '? man days = 16 man hours. <br /> , Rinse the API Separator with hot water and collect all floating ail in the <br /> tank provided. Estimated time required— 1 man day= S man lours. <br /> 4. Process all wastewater through the neutralizers,rinse the tanks and <br /> neutralize the rinsate. Discharge to the sewer. Estimated time required— 3 <br /> man days= 24 man.hours. <br /> Total man hours required = S + 16 + 8 + 24 = 56 man hours. <br /> Cost at $50/man hour= $2800. <br />