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Morita Brothers Service 9 March 7, 1992 L �r samples analyzed at no greater than a span of 10 feet between samples. It is estimated Lthat thirty soil samples will be analyzed depending on the depth of the borings. Laboratory turn around time for this phase will be 10 working days. All sampling equipment will be washed with TSP (tri-sodium phosphate) cleanser, and rinsed with tap water and de-ionized water prior to sampling, between sample intervals, and between borings to minimize the possibility of cross-contamination. • The drill auger will be steam cleaned between borings, also to minimize the possibility of cross contamination. Hot pressure washing of the augers will be performed within a containment tub, with the augers positioned on a rack. The resulting rinsate water will be pumped from the tub into DOT 55 gallon barrels for storage on the site. The facility operator is then responsible for the disposition of the rinsate, either through laboratory analysis to verify non hazardous constituents, or disposal at the appropriate liquids recycling facility. Contaminated drill cuttings, ` and soil sample spoils will also be stored in D.O.T. approved 55-gallon drums, sealed, and left on-site pending confirmation from laboratory analysis as to whether the contents are hazardous. Disposal of any contaminated soil is the responsibility of the _ facility operator. ESE will provide a recommendation in the report of findings as to the appropriate disposition of drill cuttings which are confirmed to be impacted with �. fuel hydrocarbons. All soil borings shall be backfilled with bentonite and a neat cement slurry through a grout pump with the aid of a tremmie pipe. meow The soil samples will be analyzed for total purgeable hydrocarbons (TPH) as gasoline with a minimum detection limit of 0.5 mg/kg, and the fuel constituent volatile aromatics benzene, toluene, ethylbenzene, and total xylenes (BTEX) with a minimum detection limit of L0.005 mg/kg using USEPA Test Method 5030/GCFID, and USEPA Test Method 5030/800, respectively. EB-8101-1 9203-EO16.WP