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y . 31 March 1998 AGE-NC-96-0235 Page 2 of 4 r approximately 45 feet below surface grade (bsg) and one boniig to a depth of 3 a feet bsg, collection- of soil samples, and installation of two duel-completed,2-inch diameter ground water monitoring wells and one single-completed monitoring well Soil borings will be advanced utilizing a truck- f r ` mounted, drill rig equipped with 8 25=inch and 10-inch diameter hollow-stem augers Soil samples will be collected at five-foot intervals beginning at a depth of 5 feet bsg, and will be preserved and placed in a chilled container for transportation to a state-certified laboratory Soils will a be described using the Unified Soil Classification System(USCS) Soil sample descriptions and PID screening results will be summarized on boring logs prepared for the final report 3-2 ' EQUIPMENT DECONTAMINATION All sampling tools and brass sleeves used for'sample collection will be thoroughly rinsed with clean water after washing with a solution of Alconox All hollow stem augers will be steam-cleaned prior to advancement in each borehole 33 MONITORING WELL COMPLETION Two soil borings will be duel completed as 2-inch diameter ground water monitoring wells, one A boring will be single completed as a 2-inch diameter monitoring well Proposed ground water monitoring well construction diagrams are included as Figures 3 and 4 Monitoring wells will be developed utilizing a submersible pump or bailer Water will be purged from each well so that each well is essentially sediment free Purged ground water will be stored on-site in DOT drums rL r A reference point will be marked on the top of each well head, and surveyed the to the nearest 0 01- foot to determine the elevation relative to existing monitoring wells" T t c r 34 LABORATORY ANALYSIS , _ t I Samples will be transported, under chain-of-custody, in a chilled tcontainer, to McCampbell Analytical, Inc (MAI), a state-certified laboratory;, for analysis Selected soil samples will be analyzed for total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d), for volatile aromatics(benzene,toluene, ethylbenzene,and xylenes BTE&X)with methyl tertiary-butyl ether (MTBE) and for oxygenated compounds in accordance with EPA Methods 8015m, 8020 and 8260, respectively Laboratory reports,testing methods, laboratory quality assurance/quality control (QA/QC) reports, and,sample chain-of-custody documentation will be presented in a report with the - r Advanced GcoEmironmcnial,Inc