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Coca-Cola Enterprises - West LISTEC Job No.90054.03 �j ntial for cross-eont3mination. Specific decontamination proce samples to minimize the pow dures for all sampling equipment are presented below: ' o A tap water pre-wash to remove soils stuck to the equipment. -. t o A scrub with along-handled brush in an Alconax'D detergent solution. o A tap water rinse. a A final rinse with distilled water. All effluent generated during the decontamination process was contained in DO approved 55- gallon steel dnuns. The drums were temporarily stored on-site and disposed at Gibson Oil and eceipt of the Refinery Services,Inc.,after rchemical analytical results. Transportation manifests for water disposal were presented in the second quarter 1991, Quarterly Monitoring Report. 3.1.8 Boring Abandonment Following the completion of the drilling and sampling operations, each hosing not completed as a monitoring well was backfilled to the existing surface with a concrete grout (eleven sack mix). Borings B-14 through B-17 were converted into vapor extraction test wells,VEW-1 through VEW-4,respectively. Boring B-24 was converted into groundwater monitoring well MW-6. all backfill procedures were observed by Mr.Steven Schneider,San Joaquin County Public Health vapor extraction wells Services. All groundwater monitoring wells(MW-1 through MW-6)and (VEW-1 through VEW-4)will be properly abandoned after closure of the site. 3.2 ANALYTICAL CHEMISTRY PROCEDURES were Two to seven soil samples were selected to be analyzed from each boring. Seod�IFo analssis on collected at varied depths between 5 and 75 feet bgs. The samples were selected Y ion 3.1.5),visual observations, the basis of organic vapor readings(Sectand overall vertical and Aefi enin indicated t the contaminated soils were predominantly lateral coverage. �. confined to a 30-foot radius around the former 1,000- all ;easolr ine UST. 13 _ i=