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Ile <br /> g 24 August 2001 <br />' AGE-NC Project No 95-0141 <br /> Page 4 of 4 <br />' BTEX constituents were detected in four of the eight ground water monitoring wells with <br /> concentrations as high as 9,200 µg/1 benzene, 20,000 µg/1 toluene, 2,800 µg/1 ethylbenzene <br /> and 12,000 µg/l total xylenes <br />' 0 TBA was detected in MW-3, MW 6 and MW-7 at concentrations of 18 µg/l, 6 9 4g/1 and <br /> 26 µg/l, respectively Fuel oxygenates had not been detected prior to the May 2001 <br />' monitoring event RIPE, MTBE, ETBE and TAME were not detected in any of the ground <br /> water samples collected <br /> • 1,2-DCA was detected in ground water samples collected from each of the eight monitoring ; <br />' wells at the site at concentrations as high as 350 µg/1(MW-1) EDB was not detected in any <br /> of the ground water samples collected during the August monitoring event <br /> 9 The horizontal and vertical extent of contamination related to the former UST has not yet <br /> been defined in soil or ground water <br />' 0 Measured ground water elevation is approximately 12 3 feet below msl, and was within the <br /> screened interval of the two shallow monitoring wells (MW-7 and MW-8) Ground water <br /> was approximately 10 feet above the screened intervals of MW-1 through MW-5 and was <br />' • approximately 40 feet above the screened interval of the deep well MW-6 <br /> S.U. RECOMMENDATIONS <br /> Based on the results oft<h:M and p,evious investigations, AGE reLonmicnds <br />' * Continued quarterly monitoring of the ground water monitoring network <br />' • Preparation of a work plan addendum to define the vertical and horizontal extent of <br /> hydrocarbon impacted soil and ground water at the site <br />' G.O. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the geologic conditions <br /> at the site have been made from a limited number of available data points (i a monitoring wells and <br /> ground water samples) and subsurface conditions may vary away from these data points No other <br /> warranty, expressed or imphed, is made as to the professional recommendations contained in this <br /> report <br /> I <br /> Advanced GeoEBvironmental,Inc <br />