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,WWI 05 December 2007 AGE-NC Project No. 97-0327 Page 5 of 8 stem drill rig and 8`/4-inch diameter hollow-stem augers. Cuttings and rinseate generated during drilling activities will be containerized in properly labeled Department of Transportation (DOT)- approved model 17H 55-gallon drums in an area lacking accessibility to the general public. Disposal alternatives will be evaluated based on results of soil and water analysis. 3.2. SOIL AND GRAB GROUND WATER SAMPLING Soil samples will not be collected for laboratory analysis; however, soil samples will be collected from P-1 J P-1P-lVand MW-5 at five-foot intervals for general logging purposes. Soil samples will be collected utilizing a modified California split-spoon sampler assembly loaded with brass sleeves. The sampler will be driven by dropping a 140-pound weight from a height of 30 inches (blow counts). The blow counts required to drive the sampler over each 6-inch interval will be recorded on the boring logs. Soil sample duplicates will be monitored for the presence of organic vapor using a photo-ionization detector (PID: Thermo Environmental 580. 10.0 eV, calibrated to isobutylene) and will be visually described on boring logs using the Unified Soil Classification System (USCS). At least one grab ground water sample will be collected from soil boring P-1.7 at a depth of approximately 55 feet bsg utilizing a Hydro-P.,unch water sampling assembly; grab ground water samples will be collected from borings P-1?`and P-19'at depths of 55 feet (shallow), 75 feet (intermediate)and 95 feet bsg(deep). Grab ground water samples will be analyzed for the petroleum constituents referenced in Section 2.2. For the ground water sampling assembly, a stainless-steel probe rod will be fitted with a retractable ground water screen and advanced to the discrete depth of each boring; upon reaching total depth, the rods will be pushed another 3 feet beneath the bottom of the bore-hole into saturated soil,and pulled upward to allow ground water to flow into the screen. A bailer fitting will then be placed on the end of 3/8-inch diameter polyethylene tubing, inserted through the rod assembly into the exposed screen, through which water will be manually pumped. Grab ground water samples will be transferred to the following containers: three 40-milliliter(ml) EPA-approved volatile organic analysis(VOA) vials containing no sample preservative and to one 1-liter amber bottle without preservative. Care will be taken to ensure that visible air bubbles wets not present in the vials after filling and capping.Ground water sample containers will be labeled with the well designation, date, time, and sampler's initials. Following water sample collection, each sample container will be labeled with the boring/well location, depth, time, date and sampler's initials. Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to a CDPH-certified laboratory. Advanced GeoEnvironmental,Inc.