Laserfiche WebLink
' 19 December 2002 <br /> AGE-NC Protect No 98-0492 <br /> Page 2 of 3 <br /> sample preservative and into one 1-liter amber bottle without sample preservative After collection, <br /> the samples were,properly labeled, placed in a chilled container and transported under chain-of- <br /> custody to McCampbell Analytical,Inc (MAI),a California Department of Health Services(DHS)- <br /> certified analytical laboratory The samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline and as diesel (TPH-g and TPH-d) in <br /> ' accordance with EPA Method 8015 Modified, <br /> • Benzene,toluene, ethylbenzene and total xylenes(BTEX)in accordance with EPA Method <br /> ' 8260B, and <br /> • Fuel additives, including, di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary-butyl <br /> ' alcohol(TBA), 1,2-dichloroethane(1,2-DCA)and ethylene dlbromide(EDB) In accordance <br /> with EPA Method 8260 Modified <br /> 3.0. FINDINGS <br /> ' Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 07 November 2002, the contaminant impact to ground water was assessed from the laboratory <br /> ' analytical data obtained from the sampling event <br /> ' 3 1 GROUND WATER ELEVATION, GRADIENT AND FLOW DIRECTION <br /> At the time of the November 2002 sampling event,depths to ground water in wells MW 1,MW2 and <br /> ' MW3 ranged from 23 02 feet to 24 26 feet below the well heads Ground water elevations at the site <br /> ranged from 13 06 feet above mean sea level(MSL)in well MW2 to 13 15 feet abdve MSL in well <br /> ' MW 1 (Table 1) Ground water elevations at the site increased an average 0 08 feet between the <br /> August 2002 and November 2002 sampling events <br /> ' The ground water flow direction was determined using ground water elevation data from the three <br /> monitoring wells on-site The flow direction was found to be toward the west with a hydraulic <br /> gradient of 0 001 feet/feet Figure 3 illustrates the contoured ground water elevations as measured <br /> ' on 07 November 2002 <br /> 1 ' <br /> Advanced GeaEnvironmental,Inc <br />