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L. 27 December 2004 <br /> AGE-NC Project No. 98-0433 <br /> Page 3 of 4 <br /> LM <br /> elevation data are presented in Table 1. <br /> In general, the ground water flow direction at the time of the fourth quarter 2004 monitoring event <br /> was east to northeast, with a..shallow depression at well MW-1. Hydraulic gradients ranged from <br /> 0.005 foot/foot(ft/ft)to'0.011 fNl,northeast of the former USTs, and 0.0006 ft/ft west of the former <br /> USTs (Figure 3). - <br /> 3.2. ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> La TPH-g was detected in the ground water samples collected from MW-1,MW-5,MW-6,MW-8,and <br /> MW-9 at concentrations as high as 4,000 micrograms per liter(µg/1)in MW-9.TPH-d was detected <br /> in the ground water samples collected from wells MW-1, MW-6, and MW-9 at concentrations as <br /> 'o high as 190 milligram per liter(mg/1). <br /> %"'04 <br /> Benzene and toluene were detected in well MW-6 at concentrations of 27 µg/1 and 6.4 µg/1, <br /> respectively. Ethylbenzene and xylenes were detected in wells MW-5 and MW-6 at concentrations <br /> in MW-5 as high as 98 µg/I ethylbenzene and 580 µg/1 xylenes. <br /> MTBE was detected in samples MW-1,MW-6,MW-8, and MW-9 at concentrations of 1,500µg/I, <br /> 27 µg/1, 500µg/l, and 3,900 µg11,respectively.TAME was detected in samples MW-1,MW-8,and <br /> MW-9 at concentrations of 41 µg/1, 38 µg/1, and 39 µg/1,respectively. , <br /> No other target analytes were detected at or above laboratory reporting limits in any of the ground <br /> water samples collected from the monitoring wells or on-site domestic well (DW-1). <br /> Analytical results from ground water samples are summarized in Table 1. The laboratory report <br /> �.. (CTEL Project No. CT214-0410131), quality assurance and quality control (QA/QC) report, and <br /> chain of custody forms are included in Appendix B. The distribution of dissolved hydrocarbons is <br /> depicted on Figure 4. <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based upon the data collected during the October 2004 monitoring event, AGE concludes: <br /> Ground water at the site was encountered at 25.46 feet to 27.25 feet below the tops of <br /> well casings. The prevailing ground water flow direction was generally toward the east to <br /> northeast,with.a shallow depression at well MW-1.Hydraulic gradients ranged from 0.005 <br /> `a ft/ft to`0.01 i ft/ft"northeast of the former USTs, and 0.0006 ft/ft west of the former USTs. <br /> LM Advanced GeoEnvironmental,Inc. <br /> 1.• <br />