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v `.r I') November 2000 AGE-NC Project No. 98-0504 Page 5 of 9 Soil samples will be collected from within the 8.25-inch hollow-stem augers at five-foot intervals using a California split-spoon sampler and brass sleeves. The sampler will be driven by dropping a 140-pound weight from a height of 30 inches. The number of blows required to drive each 6-inch length of the sampler (blow counts) are to be recorded on boring logs compiled by an AGE stag' geologist. Upon sample retrieval, the leading brass sleeve will be removed from the sampler. The ends of the sleeve will be immediately covered with Teflon sheets and sealed with plastic end caps secured with tape. The preserved samples will then be immediately placed under ice in a chilled container for transportation to a state-certified laboratory. Each soil sample sleeve will be labeled with boring location, vertical depth, sampling time, date and sampler's initials. AGE proposes to install single screened aground water monitoring and ground water extraction wells. These wells will consist of a 20-foot screen section with five feet of screen extendin- above the t�+�•fi� current water table (25-45 feet bsg). -l%y `�' Followinyo well installation, the well will be developed to maximize water flow into the well and minimize the amount of fine-grained sediment drawn into the well during pumping and sampling. Procedures for well installation and development are presented in Section 4.2 and 4 3. 3.3. EQUIPMENT DECONTAiN41NrATION 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 augers will be cleaned prior to advancement in each boring location. 3.4. LABORATORY ANALYSIS Selected soil samples will be analyzed for: • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in accordance with LPA Method 8015 Modified, • Volatile aromatic hydrocarbons: benzene, toluene, ethyl benzene and total xylene (BTEX) in accordance with EPA Method 8020 and • Oxygenated compounds: di-isopropyl ether(DIPE), ethyl tertiary-butyl ether (E,TBE), methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether- (TAME), tertiary butanol (TBA)_ methanol, ethanol, ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260. 4dranced GeoEnvirnnmental.Inc.