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1 <br /> f <br /> r , , <br /> 15 September 2000 <br /> AGE-NC Project No 95-0103 <br /> Page 2 of 5 <br /> 2 2 ' GROUND WATER SAMPLE COLLECTION <br /> f <br /> 1 I <br /> Water samples were retrieved from each purged well using new disposable bailers The samples were <br /> transferred into 40-m1 EPA-approved volatile organic analysis (VOA) vials containing 0 5 ml <br /> ' hydrochloric acid(18%)as a sample preservative The samples were transported in a chilled container <br /> ` under chain-of-custody to McCampbell Analytical, Inc (MAI), a California Department of Health <br /> ' Services (DHS)-certified laboratory, for analysis The ground water samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g),in accordance with EPA <br /> ' Method 8015-modified for gasoline, <br /> • Purgeable aromatic compounds benzene,toluehe,ethyl-benz6ne and,total xylenes(BTE&X)' <br /> with methyl-tert-butyl ether (MTBE) in accordance with EPA Method 8020, <br /> ' • ' Oxygenating fuel additives tertiary butyl alcohol(TBA),di-isopropyl ether(DIPE), MTBE; <br /> ethyl tertiary butyl ether(ETBE)and tertiary amyl methyl ether(TAME)in accordance with <br /> ' EPA Method 8260-modified, <br /> 1 , <br /> • 1,2-dichloroethane,(1,2-DCA) in accofdance with EPA Method 8260, ' <br /> • 1,2 Dibromoethane (EDB) in accordance with EPA Method 8260 <br /> k <br /> 1 23 ,SOIL VAPOR SAMPLE COLLECTION <br /> r <br /> ' A soil gas/vapor sample was collected on 22 August 2000 The soil gas/vapor samples were collected <br /> in Tedlar bags frorri the influent stream The samples were collected with a vacuum pump 'The <br /> samples were labeled,placed in a cool ice chest and transported under chain-of-custody to MAI The " <br /> ' samples were analyzed for r <br /> i L <br /> • TPH-g'in accordance with EPA method 8015 Modified and <br /> • BTEX in accordance with EPA method 8020 <br /> , <br /> diF ' • . 1 <br /> ' <br /> ` 3.0. FINDINGS <br /> 3 1 GROUND WATER ELEVATION <br /> Depth to ground water ranged from 10 18 to 12 11 feet below the top of the well casings >Ground > <br /> ' water elevation decreased approximately) 27 feet between the April 2000 and July 2000 monitoring <br /> events An apparent ground water mound is located north of the site The ground water flow <br /> Advanced CeoEnvirownental,Inc i <br /> f <br /> � n 1 <br /> f , <br /> n <br /> f � <br /> 1 <br /> f r f <br />