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03 May 2005 <br /> i� AGE-NC Project No 03-1055 <br /> Page 2 of 3 <br /> The samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) in accordance with EPA Method 8015M, and <br /> • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and fuel oxygenates di-isopropyl <br /> ether(DIPS),ethyl tertiary-butyl ether(ETBE),methyl tertiary-butyl ether(MTBE),tertiary- <br /> amyl methyl ether(TAME),tertiary-butyl alcohol(TBA), 1,2-dichloroethane(1,2-DCA),and <br /> ethylene dibromide (EDB) in accordance with EPA Method 8260B <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data The <br /> contaminant impact to ground water was quantified from laboratory analytical data <br />'•) 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the February 2005 sampling event, depths to ground water ranged from 6 77 feet <br />' (MW-7)to 9 53 feet(MW-6)below the tops of the well casings Ground water elevations at the site <br /> averaged approximately 40 34 feet above mean sea level (MSL), Table 1) During this monitoring <br /> event, the ground water level in wells MW-5, MW-6, and MW-7 was below the tops of the well <br />' screens, indicating that the wells are properly screened and representative of shallow ground water <br /> conditions <br />' Ground water flow was inferred to be toward the northwest under an average hydraulic gradient of <br /> approximately 0 0363 foot per foot(ft/ft) Figure 3 illustrates the contoured ground water elevations <br /> as measured on 24 February 2005 <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> No contaminants of concern (COC) were detected at or above laboratory detection limits in the <br /> ground water samples analyzed The analytical results of the ground water samples collected on 24 <br /> February 2005 are summarized in Table 2 The laboratory report (CTEL Project No CT214- <br /> 0502164),quality assurance/quality control(QA/QC)report,and chain of custody form are included <br /> in Appendix C Documents confirming the upload of laboratory electronic deliverable format(EDF) <br /> files and depth to water measurements to GeoTracker are included in Appendix D <br /> Advanced Geofnvironmcntal,Inc <br />