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i 09 March 2005 AGE-NC Project No 95-0121 , Page 3 of 7 , After the depth to ground water was measured, between 10 5 and 17 0 gallons of ground water(a ' minimum of three casing water volumes per well)were evacuated(purged) from monitoring wells MW-1 through MW-8 utilizing a Waterra Inertia pump and dedicated'tubing At the request of AGE to the EHD by telephone,up-gradient monitoring well MW-9 was not purged or sampled during this - monitoring event ' Temperature,pH,and conductivity were measured for stabilization at regular purge-volume Intervals using an Oakton water analyzer Field data and logs are Included in Appendix B Purged ground water was containerized in properly labeled, Department of Transportation (DOT)-approved 55-gallon drums and stored on-site in an area lacking general public access r f 2'2 2 Collection and Analysis of Ground Water Samples Pnor'to sampling, the depth to ground water was re-measured to ensure that a minimum 80% well volume recharge had been achieved Ground water samples were collected from wells MW-1 through MW-8 using a Waterra inertia pump and dedicated tubing The samples were transferred into, three 40-milliliter (ml) volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid solution as a sample preservative, and into one 1-liter amber bottle without preservative The samples were logged on a chain of custody form, stored in a chilled container,and ' transported to CAL for analysis The ground water samples were analyzed for • TPH-g in accordance with EPA Method 8015, BTEX and MTBE in accordance with EPA Method 8020, and • Fuel additives MTBE di-isopropyl ether(PIPE), ethyl tertiary-butyl ether ETBE tertiary- amyl methyl ether (TAME), tertiary-butyl alcohol (TBA), 1,2-dibromoethane (EDB), and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260 r 1' 3.4. ' FINDINGS The impact of petroleum hydrocarbon constituents to soil vapor samples was quantified by laboratory analytical data,the mass of TPH-g extracted by the SVE system was calculated from the flow rate and laboratory analytical'data Ground water elevation, flow direction, and gradient were ' determined from field data collected on 19 July 2004, the contaminant impact to ground water was quantified by analysis of ground water samples i ` r i + , � Advanced GeoEnvironmental,Inc f v ., i