Laserfiche WebLink
1 { <br />' 15 January 2006 <br /> • AGE-NC Project No 04-1045 <br />' Page 2 of 4 <br />' and the sampler's initials and transported in a chilled container under chain of custody to Cal Tech <br /> Environmental Laboratories(CTEL),a Department of Health Services-certified analytical laboratory, <br /> for analysis The samples were analyzed for <br />' Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) In <br /> accordance with EPA Method 8015 Modified, <br />' Benzene,toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA Method <br /> 8260, and <br />' The fuel additives di-isopropyl ether (DIPS), ethyl tertiary-butyl ether (ETBE), methyl <br /> tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> 1,2-Dichloroethane (1,2-DCA) and 1,2-Dibromoethane (EDB) by EPA Method 8260 <br />' Modified <br /> 3.0. FINDINGS <br />� . Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 04 November 2005 The contaminant impact to ground water was quantified from the laboratory <br /> analytical data <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> fV <br /> At the time of the November 2005 sampling event, depths to ground water ranged from 18 37 feet <br /> (MW-2)to 20 43 (MW-3)feet below the tops of the well casings(Tabl63� �aftr levels were at least <br /> I3 37 feet below the top of the well screens, indicating that the wells are properly screened and <br /> representative of shallow ground water conditions The average calculated ground water elevation <br /> was approximately 9 79 feet below mean sea level (MSL) <br /> Ground water flow was inferred to be southeast at a hydraulic gradient of approximately 0 079 feet <br /> per foot (ft/ft) Figure 3 illustrates the contoured ground water elevations as measured on <br /> 04 November 2005 <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in the ground water sample collected from well MW-1 at concentrations of <br /> 220,000 micrograms per liter(µg/l), and from MW-2 and MW-3 at concentrations of 160 and 120 <br /> . µg/1, respectively <br /> Advanced GeoEnvironmental,Inc <br />