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1 <br /> 06 July 1999 <br /> AGE-NC Project No. 95-0197 <br /> ' Page 2 of 8 <br /> 2.1.1. Soil Sample Collection <br /> ' Discrete soil samples were collected at 5-foot intervals beginning at 5 feet bsg from soil borings <br /> MW-2 through MW-4 and beginning at 10 feet bsg from MW-1. Soil samples were collected <br /> ' utilizing a California split-spoon sampler loaded with 2-inch by 6-inch brass sleeves. The sampler <br /> was driven by dropping a 140-pound weight from a height of 30 inches. The number of blows <br /> ' required to drive each 6-inch length of the sampler (blow counts) was recorded on boring logs by <br /> an AGE staff geologist. <br /> ' Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, <br /> capping and sealing with tape. Each preserved sample sleeve was labeled with soil boring location, <br /> depth,time, date and sampler's initials. <br /> Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> ' in accordance with: <br /> G EPA Method 5030/8015M for total petroleum hydrocarbons quantified as gasoline and diesel <br /> (TPH-g and TPH-d, respectively); <br /> EPA Method 8020 for volatile aromatic compounds: benzene, toluene, ethylbenzene and <br /> xylene (BTEX) with methyl-tertiary butyl ether (MTBE); and <br /> G EPA Method 8260 Modified for tertiary butanol(TBA),di-isopropyl ether(DIPE),ethyl tert <br /> ' butyl ether (ETBE), tert amyl methyl ether (TAME), and confirmation of MTBE. <br /> ' The results of the soil analyses are contained in Table 1. <br /> ' 2.1.2. Equipment Decontamination <br /> The hollow stem augers were steam cleaned prior to each bore hole advancement. Sampling tools <br /> and brass sleeves used for sample collection were thoroughly washed with a solution of Alconox, <br /> and were thoroughly rinsed with clean tap water prior to each sampling run. Following drilling <br /> activities, rinseate generated from decontaminating the equipment was placed in properly labeled <br /> D.O.T.-approved model 17H 55-gallon-drums and was stored on-site in an area lacking public <br /> access. <br /> Advanced GepEnvironmentat,Inc. <br />