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1 r <br /> � r <br /> 1 <br /> 15 May 2001 <br /> • AGE-NC Project No 98-0534 <br />' Page 2 of 4 ry <br /> 5 <br />' DOT-approved H-17 storage drums pending proper disposal Following purging,the depth to ground <br /> water was measured to ensure that a muumum of 80%well-volume recharge had been achieved prior <br /> 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 volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid as a <br /> sample preservative The samples were logged on'a chain-of-custody form, stored in'a chilled <br /> container under ice The samples were later transported under chain-of-custody to McCambell <br />' Analytical, Inc (MAI), a State of California Department of Health Services (DHS)-certified <br /> analytical laboratory for analysis <br /> 2 2 GROUND WATER ANALYSIS <br /> A total of seven ground water samples were analyzed for the following <br /> . 0 Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br /> C Volatile aromatic hydrocarbons-benzene,toluene, ethylbenzene and total xylenes (BTE&X) <br /> in accordance with EPA Method 8020, and <br /> e Oxygenated compounds - di-isopropyl ether (RIPE), ethyl tertiary-butyl ether (ETBE), <br />' methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol <br /> (TBA), ethyldibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in'accordance with EPA <br /> Method 8260-Modified, respectively <br /> _ II <br />' 3.0. FINDINGS , <br /> Ground water elevation, flow direction and gradient were,determined from field data collected on <br /> 18 December 2000, the contaminant impact to ground water was assessed from,the laboratory data <br /> 1; 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> The casing elevation of each well installed was surveyed on 02 August 2000,to the nearest 0 01-foot, <br /> relative to well MW-1 assigned a relative, arbitrary elevation of 5 00 feet The results of the <br /> monitoring well survey are contained in Table 1 <br /> Advanced GeoEnviron mental,Inc <br />