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1 <br />' 25 August 2004 <br /> • AGE-NC Project No 01-0877 <br />' Page 3 of 4 <br />' the screened interval of each well, indicating that the wells were screened properly to yield <br /> representative ground water samples <br />' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br />' TPH-g was detected in all ground water samples at`concentrattons ranging from 41,000 micrograms <br /> per liter(µg/1)in sample MW-4 to 120,000 ltg/l in sample MW-3 BTEX compounds were detected <br /> in water samples collected from all wells, the maximum concentrations were 51,000 [tg/1 benzene <br />' <br /> (MW-3),5 1,000µg/1 toluene(MW-1 and MW-3),5,500 pg/l ethyl-benzene(MW-1)and 30,000µg/1 <br /> xylenes (MW-1) <br />' 1�2-DCA and EDB were detected in the ground water samples collected from wells MW-1 through <br /> MW-3,at maximum concentrations of 120µg/1(MW-3)and 88 µg/1(MW-1),respectively No other <br /> target analytes were detected at or above laboratory reporting limits in the ground water samples <br />' analyzed ` <br /> Concentration maps depicting the approximate distribution of dissolved TPH-g and benzene are <br /> tpresented in Figures 4 and 5, respectively The analytical results of ground water samples collected <br /> on 20 April 2004 are summarized in Table 3 The laboratory report (CTEL Project No CT214- <br />' 0404154),quality assurance/quality control(QA/QC)report and chain-of-custody form are included <br /> in Appendix D <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> The following conclusions were drawn from the results of this investigation <br /> • During the April 2004 monitoring event,the average ground water elevation at the site was <br /> 16 56 feet below MSL Ground water flow was inferred to be towards the northeast under <br />' a gradient of 0 004 ft/ft <br /> • High concentrations of TPH-g and BTEX compounds were detected in all monitoring wells <br />' during the second quarter 2004,in addition, 1,2-DCA and EDB were detected in wells MW-1 <br /> through MW-3 at maximum concentrations of 120 µg/1 (MW-3) and 88 µg/1 (MW-1), <br /> respectively <br />' 0 The highest concentrations of contaminants were detected near the area of wells MW-1 and <br /> MW-3 These locations correspond to the location of the former UST #3, one the possible <br />' mayor release point(s) of the UST system <br />' Advanced Geo Environmental,Inc <br />