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• 17 June 2005 AGE-NC Project No 02-0962 Page 2 of 4 Into one 1-liter amber bottle without preservative The samples were labeled with the monitoring well designation, date, time of sampling, and the sampler's Initials-and transported In a chilled container under chain of custody to Cal Tech Environmental Laboratories (CTEL), a State of California Department of Health Services (DHS)-certified analytical laboratory, for analysis The samples were analyzed for • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, respectively) in accordance with EPA Method 8015M, and • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and fuel additives methyl tertiary- butyl ether(MTBE),tertiary-butyl alcohol (TBA), di-isopropyl ether(DIPE), ethyl tertiary- butyl ether(ETBE),tertiary-amyl methyl ether(TAME), 1,2-dibromoethane(EDB),and 1,2- dichloroethane (1,2-DCA) in accordance with EPA Method 8260B 3.0. FINDINGS Ground water elevation and flow direction were Inferred from field data, hydrocarbon impact to ' ground water was quantified by laboratory analysis of the ground water samples 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION ' The elevation of ground water in each of the monitoring wells was calculated by subtracting the depths to ground water from the surveyed relative casing elevations (Table 1) Depths to ground water ranged from 18 19 feet (MW-1) to 18 36 feet (MW-2) below the tops of the well casings ' Ground water elevation at the site averaged approximately 6 33 feet below mean sea level (MSL), indicating an Increase In ground water elevation of 14 feet since the last ground water monitoring event in March 2004 ' During the May 2005 ground water monitoring event, ground water was inferred to be flowing toward the southeast under a hydraulic gradient of approximately 0 001 foot/foot(ft/ft) During this ' monitoring event,ground water elevations were within the screened intervals of the wells,indicating that the wells are properly screened to yield samples representative of shallow ground water conditions Figure 3 illustrates the contoured ground water elevation as measured on 25 May 2005 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES . None of the constituents listed in Section 2 3 were detected in ground water samples from any of Advanced GcoEnviroomental,Inc