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i F <br /> 1 f <br /> 19 January 2005 <br /> AGE-NC Project No 00-0769 <br />' Page 6 of 7 s <br /> The fuel additives 1,2-DCA and TAME were detected in the samples from wells MW-4D through <br />' MW-6D at concentrations ranging from 78 gg/l (MW-4D) to 3 8 µg/l (MW-6D) 1,2-DCA, and <br /> 70 gg/l (MW-4D) to 4 1 µg/l (MW-6D) TAME <br /> 1 ` <br /> HU-5 <br /> 1 Ground water samples from"E"wells MW-4E and MW-5E were collected from HU-5(193 feet to <br />' 198 feet bsg) <br />' TPH-g was detected at In the samples collected from wells MW-4E and MW-5E at concentrations <br /> of 2,600 µg/1 and 590 µg/1, respectively <br />' BTEX compounds were detected in wells MW-4E and MW-5E at maximum concentrations of <br /> 280 µg/1 benzene, 330 µg/1 toluene, 130 gg/1 ethylbenzene, and 109 gg/l total xylenes In well <br />' MW-4E <br /> • The fuel additive 1,2 DCA was detected in samples MW-4E and MW-5E at concentrations of <br />' 15 gg/l and 3 4 gg/l, respectively TAME was detected in MW-4E at a concentration of 9 2 µg/1 <br /> No other constituents of concern were detected at or above laboratory reporting limits in the ground <br /> water samples collected during the third quarter sampling event Analytical results of ground water <br /> samples are summarized in Tables 2 through 5 The laboratory report (CTEL Project No CT214- <br />' 0409028), quality assurance/quality control (QA/QC) reports, and chain of custody forms are <br /> provided in Appendix C Documents confirming the upload of laboratory electronic deliverable <br /> format (EDF) files and depth to water measurements to GeoTracker are included in Appendix D <br /> 1 <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based on data collected during the August and September 2004 ground water monitoring event, <br /> AGE concludes , <br />' 6 Ground water elevation at the site ranged from 16 69 feet to 20 89 feet below MSL during <br /> the August and September 2004 monitoring event Site ground water elevations decreased <br /> an average'of 148 feet between the May and August 2004 monitoring events <br /> • The HU-1 potentiometric surface is In the shape of a north-south trending ridge, ground <br />' water generally flowed west, east, and south away from this ridge at gradients between <br /> 0 003 ft/ft and 0 01 ft/ft Ground water flow in HU-2 is generally south and southeast at <br /> gradients between 0 001 ft/ft and 0 002 ft/ft Ground water in HU-3 generally flows east at <br /> 1 s <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />