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4 I <br /> � I <br /> �e I, 1 1 y f 1 "14 <br /> 10 <br /> S <br /> 10 December 2004 <br /> AGE-NC Project,No 97-0312 <br /> I Page 3 of 4 <br /> 1 <br /> 3 1 'I GROUND WATER ELEVATION AND GRADIENT' <br /> Depths to ground water at the site ranged from 72 19 feet to 72 90 feet below the'tops of the well <br /> 4 J,f casings, ground water elevations ranged from 44 17 feet (UST-4)'and 44 33 feet (UST,'2):below -V <br /> mean sea level (MSL) The average ground water elevation at the site during the third'quarter 2004 <br /> was'44 25 feet below MSL, a decrease of 6 65 feet since the June 2004 monitoring event The <br /> ` ground water table occurred within the screened intervals of monitoring wells UST-2 through , <br />' UST-6 Momtonng well UST-7 ,was designed to monitor deeper ground water, with a 5-foot <br /> screened interval set at approximately 21 feet below the water table, since it is possibly monitoring <br /> a differenhhydraulic zone, UST-7 vvas not used to determine gradient and flow direction <br /> ,, _ General ground water flow direction at the site'was inferred to be toward the northwest under a , <br />' hydraulic gradient between 0 0005 foot/foot(ft/ft)and,0 002 ft/ft Figure 3 depicts the ground water <br /> elevation contours for August 2004^ <br /> Monitoring data from UST-2, UST-3, UST-4, and UST-6 was combined with monitonng data <br />' collected from the adjacent Moore Truck Lines property to determine an approximate'regional <br /> ground water flow direction <br /> 3 2' ; ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' <br />' <br /> Not ar j analytes were detected at or above laboratory reporting levels in the ground water samples <br /> get yt <br /> collected this quarter The laboratory report (CTEL Project No CT214-0408185), quality <br />' assurance/quality control (QA/QC) report, and chaiin of custody forms are included in Appendix B v <br /> Analytical results of water samples collected during the third quarter 12004 are summarized in ' <br /> Table 2 The analytical results of historical water samples are summarized in Tables 3 and 4 <br /> Documents confirming the upload of laboratory electronic deliverable format(EDF)files and depth <br /> ' to water`rneasurements�to-GeoTracker are included in Appendix C <br /> F � <br /> i 4 <br /> 4.0. DISCUSSIOMAND CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes <br /> • Ground water elevation decreased, aproximatel' 6 65 feet at the site between the June 2004 and August 2004 monitoring eventsThe inferred ground water'flow direction was generally ` <br /> " 4 I toward the northwest'The,ground water gradient ranged between 0 0005 ft/ft and 0 002 ft/ft <br /> I <br /> across the site <br /> I <br /> , <br /> Advanced GeoEnvironmental,Inc <br />