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-16 ApnU'2000 AGE-NC ProjectNo 98-0468" I - ' Page'2 of 4 ; and MW-8,'and '40 gallons ofwater were evacuated from monitoring well MW-6. Approximately, ' . 3 to 10 gallons of water were evacuated from each of the other'monitoring wells (a minimum three,- casing water volumes), as appropriate for each well. Temperature, pH and-conductivity were measured at regular intervals, using a Hydac,water analyzer•to.m' onitor stabilization of these ground ' water parameters:Field data logs are'included in Appendix A. Purged water,waster porarily stored. ori-mte.in 55-gallon'drums. '^ = 2.6'. COLLECTION AND ANALYSIS OF GROUND WATER.SAMPLES " Waier.•samples were collected from selected monitoring wells (MW-3 to' MW=8)' using- new. , disposable.b.ailers aft er'allowing the wells to achieve a minimum 80%o-recovery' ,of"the pre-purge ' water volume. The samples were transferred into 40-m1 EPA-approved vials containing.0.5 ml 18% hydrochloric acid .as a sample preservative and into 1-liter amber-bottles-.,without a 1 sample preservative. The sample containers were then labeled with the monitoring Well.designation,' date, time of sampling and the sampler's initials The samples were;transported in a chilled container finder chain of custody to Mc-Campbell Analytical Laboratory_ (MIA) , a,DHS-certified analytical ' laboratory for,analysis: The samples were analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPI -g) in accordance with,EPA Method 8015-Modified, Total petroleum hydrocarbons quantified as diesel (TPH-d)in accordance with EPA Method ,8015 Modified, ' Volatile aromatic compounds, specifically benzene, toluene, ethylbenzene, and total"Xylenes (BTEX)with'methyl tertiarybutyl ether(MTBE)in accordance with,EPA,Method 8020, and ' Oxygenated fuel•additives: MTBE;tertiary butyl alcohol,(TBA), di isopropyl ether (DIPS), ethyl tertiary butyl,ether(ETBE) and tertiary amyl methyl ether(TAME)in accordance with EPA Method 8260-Modified. Chain`of-custody protocol's.were used to-document sample custody transfers frorn the field-to the, ' analytical laboratory: Sample chain-of custody forms and laboratory,reports •are provided in Appendix B. 1- Advanced GeoEnvironmenta[,Inc.