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1 <br /> 15 January 2001 <br /> AGE-NC Project No 98-0433 <br /> Page 2 of 5 <br /> well to ensure that a minimum of 80% of the initial water volume had recharged Water samples <br /> ' were then collected from each well using a new disposable plastic bailer The water was transferred <br /> into one 1-liter amber bottle and three chilled 40-m1 volatile organic analysis (VOA) vials containing <br /> ' 0 5 ml hydrochloric acid (18%) as a sample preservative After collection, the samples were labeled <br /> and placed in a chilled container for transportation under chain-of-custody to McCampbell <br /> Analytical Laboratories (MAI), a DHS-certified analytical laboratory Each sample was analyzed for <br /> ' the following <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br /> ' accordance with EPA Method 8015 Modified, <br /> Volatile aromatic hydrocarbons - benzene, toluene, ethyl benzene and total xylene BTEX <br /> 1 in accordance with EPA Method 8020, <br /> • Oxygenated fuel additives - methyl butyl ether (MTBE), tertiary butyl alcohol (TBA), di- <br /> isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE) and tertiary amyl methyl ether <br /> (TAME) to accordance with EPA Method 8260 Modified <br /> 23 DOMESTIC WELL SAMPLE COLLECTION <br /> ' A water sample was collected from the domestic drinking water well located on site After the well <br /> pump was operated for one minute, a sample was collected from a dedicated sample tap The sample <br /> was placed Into one 1-liter amber bottle lacking a sample preservative and into three chilled 40-m1 <br /> ' VOA vials containing 0 5 ml hydrochloric acid (18%) as a sample preservative <br /> The sample was labeled and stored in a chilled container_ and transported under chain-of-custody to <br /> MAI to'be analyzed for constituents listed in Section 2 2 <br /> ' 3.0 FINDINGS <br /> Ground water elevations were determined by subtracting the measured depths-to-water from the <br /> surveyed casing elevations Ground water flow directions were determined by contouring the water <br /> elevations on a scaled site plan (Figure 3) The Impact of the unauthorized release on soil and ground <br /> water was quantified by laboratory analysis of samples collected during the quarter <br /> Adviineed Geol�mironmcntal,Inc <br /> 1 � <br />