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� l <br /> will be collected at 5-foot intervals for laboTatq��ry ahalysis. The <br /> results of this investigation will be included.' in the Problem <br /> Assessment Report to be submitted befgre October 1, 1993. <br /> Steps, in the installation are detailed below: <br /> 1) Drill one vadose zone well using truck-mounted, continuous- <br /> flight, 8-inch diameter hollow-stem augers and complete <br /> according to the well design shown in Figure-": 3. i <br /> 2) Obtain discrete sail samples at five-foot intervalsr. , using a <br /> split-tube sampler loaded with three pre-clewed brass tubes. <br /> 3) Decontaminate sampling equipment; in a tri-godium phosphate <br /> solution (TSP) and rinse twice with water;: prior to each � . <br /> sampling run. <br /> 4) Describe auger returns and sail samples in aco: rdance•with the <br /> Unified Sail Classification Systom on boring1log. � <br /> 5) Visually examine soil samples, and use portable photo-] <br /> ionization detector to screen sampXes for evidence of volatile, ; <br /> organic hydrocarbons. <br /> • E <br /> 6) Preserve samples in the lower brass tube by co,'�►ypring bath ends, , <br /> with aluminum foil, capping, and sealing wit* tape. <br /> 7) Label and log sail samples on a chain-wf--custody form.. ; <br /> E . <br /> 8) Store samples under ice. <br /> 9) Store sail cuttings on plastic pending analytical results. 1 j <br /> 10) Steam-clean auger flights after drilling. <br /> 11) Transmit soil samples to a state-certified laboratory, and' <br /> analyze for purgeable petroleum hydrocarbons (TPH-G) in <br /> aocordance with EPA method BO15 and for aroma. is hydrocarbons <br /> (BTE&X) -il accordance with EPA method 8024. <br /> a <br /> • S55[ <br /> I •- j <br /> 2. <br /> • a <br />