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Itrr. ., h ;#»» ,. _ - - .:zed - ,.2 r:x.�• - *•e._. _ _ _ �i=. `. - -✓ ..i, ;<.. _a,zq. - <br /> 25 Apnl-2000' <br /> ,i AGE-NC Project No. 95-0.109' - Y <br /> t` Page 2,6f 4 <br /> 2.2. <br /> COLLECTION OF GROUND WATER SAMPLES- <br /> S <br /> The depth to water was'remeasured after purging to ensure a minimum of 80 per cent.recharge prior <br /> to sampling' Water samples were collected from each purge'd"well dsirig disposable"plastic bailers: `4 <br /> 1. lmmediately upon retrieval, the samples were'transferred into 40-ml EPA-approved VOA vials <br /> containing O.SmI 18%hydrochloric acid as a sample preservative. The samples were.labeled,stored E <br /> on ice; and transported in aAilled,Container, under claim-of-custody, to McCampbell A_ nalytical, ' <br /> Inc. (MAI) a State of California Department of'rHealth Services {DHS)-certified railalytical <br /> laboratoiy. All samples were-anal <br /> • Total petroleum` hydrocarbons quantified as.gasoline (TPH-g) in 'accordance-with.EPA <br /> Method's 5030/80151ri;: .. E <br /> Volatile aromatic compounds.:- benzene, toluene, ethylbenzene and xylenes'(BTEX) and „ <br /> } ° methyl tertiary-butyl ether'(MTBE),in accordance with EPA'method 8020/602;and . <br /> Volatile' organic, compounds with fdel oxygenates: di--isopropyl ether (DIPE), ethyl r <br /> .terti - -bu 1 ether' ETBE ,MTBE,tertiary-amyl meth 1-ether TAME and tertiary butanol <br /> (TBA) in;.accordance withi EPA Method 8260m. <br /> S amples collected from MW-�9 and MW-14 were also transferred into bne=liter amber bottles without j. <br /> added preservative: These samples were transported to:A._"Keith Kaufman in Culver City-and <br /> I, analyzed for•physico,chemical properties and microbiological enumeration. . <br /> 3.0. FINDINGS r ` <br /> Ground water elevation and'flow. direction were inferred.froni;field data; hy,'drocar'bon=impact to ; <br /> ground water;was inferred froin laboratory analysis of the ground water samples. <br /> 3.1. , GROUND WATER GRADIENT AND DIRECTION <br /> -The'd' nth to ound oraterran e from 5 .4 feet bs north•of the site toF53.15 feet bsg south of the <br /> site during the;March2001 monitoring event.,Data from;the monitoring wells indicates ari average <br /> ' urid=water'el'evatiori'between December 2000 and March 2001.'Ground <br /> 0.58=foot increaseof gro <br /> " <br /> water elevation contours,based upon data col don l'4 March 2001,are depicted iri Figure 3.'The <br /> inferred ground water flow direction'is toward the south-southwest.-Ground water elevations are ' <br /> summarized on Table 4., <br /> a' Advanced GeoEnvironinental,Inc. <br />