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4 <br /> 4 March rch 2003 <br /> AGE-NC Project No 97-0343 <br /> Page 3 of 4 <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br /> accordance with EPA Method 8015-modified for gasoline and diesel, <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTE&X) and in accordance with EPA <br /> Method 8260B, and <br /> • The fuel additives methyl-tertiary butyl ether (MTBE), di-isopropyl ether (DIPS), ethyl- <br /> tertiary butyl ether(ETBE),tertiary-amyl methyl ether(TAME),tertiary butanol(TBA), 1,2- <br /> dibromoethane(EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method <br /> 8260B <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 05 February 2003 The contaminant impact to ground water was quantified from the laboratory <br /> analytical data <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the February 2003 sampling event, depths to ground water in wells MW4 through <br /> MW"' ranged from 56 34 f,�et to 57 53 feet below the well heads, ground water elevations ranged <br /> from 31 48 feet below mean sea level (MSL) in well MW5 to 31 57 feet below MSL in well MW7 <br /> (Table 1) Ground water elevations at the site increased an average of at least 2 9 feet since the <br /> fourth quarter 2002 monitoring event <br />' Based on the elevation contours, the ground water flow direction was inferred to be flowing <br /> generally to the northwest at an average hydraulic gradient of 0 001 feet/feet Figure 3 illustrates the <br /> contoured ground water elevations as measured on 05 February 2003 <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g,TPH-d,BTE&X and fuel additives were not detected at or above laboratory reporting limits <br />' in the ground water samples collected from wells MW4 throughMW7 <br /> The analytical results of water samples collected in February 2003 are summarized on Table 2 The <br /> laboratory report (CTEL Lab Project No CT214-0302028), QA/QC report and chain-of-custody <br /> . form are included in Appendix C <br /> ,advanced GcoEnviron mental,Inc <br />