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1 <br />' 09 October 2000 <br /> •' AGE-NC Project No 98-0534 <br />' Page 3 of 6 <br />' 2 3 2 Ground Water Sampling <br /> On 02 August 2000, a Sohnst water level meter was used to measure the depth to ground water in <br />' monitoring wells MW-1 through MW-8 After depth to ground water measurements were taken, a <br /> minimum of 3 standing water casing volumes of water were purged from each well to be sampled <br /> using a PVC submersible two-stage pump Ten gallons of water were removed from each well <br />' Temperature,pH and conductivity of purged ground water were measured at 2-gallon intervals using <br /> a Hydac water analyzer The field data and field sheets are Included In Appendix B Purged water <br />' was temporarily stored on-site in 55-gallon DOT-approved H-17 storage drums pending proper <br /> disposal Following purging, the depth to ground water was measured to ensure that a minimum of <br /> 80% well-volume recharge had been achieved prior to sampling <br />' A 'water sample was collected from each well using a new, clean, disposable plastic bailer <br /> Immediately upon retrieval, samples were transferred Into one-liter amber bottles and three 40-m1 <br />' EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative The <br /> samples were logged on a chain-of-custody form, stored In a chilled container and transported under <br /> chain-of-custody to MAI for analysis <br /> 24 SOIL AND GROUND WATER ANALYSIS <br /> A total of 20 soil samples and all ground water samples were analyzed for the following analytes <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br /> I Volatile aromatic hydrocarbons benzene, toluene, ethylbenzene and total xylenes (BTE&X) <br /> in accordance with EPA Method 8020, and <br /> • Oxygenated compounds di-Isopropyl ether(DIPS),ethyl tertiary-butyl ether(ETBE),methyl <br /> tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> ethyldibromide (EDB) and 1,2-dlchloroethane (1,2-DCA) in accordance with EPA Method <br /> 8260-Modified, respectively <br /> 3.0. FINDINGS <br /> 31 STRATIGRAPHY <br /> I In general, the soil profile consisted of brown orgray, d silt and/or clay throughout the profile, <br /> • dry, Y P� <br /> however,poorly graded fine to medium sand was encountered below or at 25 feet in borings MW 1, <br /> Advanced GeoEnvironmentai,Inc <br /> I <br />