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' 28 March 2002 <br /> . AGE-NC Project No 95-0141 <br /> Page 4 of 4 <br /> • TPH-g was detected in ground water samples collected from seven of the eight monitoring <br /> wells at the site (MW-1 through MW-4, MW-6 and MW-7) Concentrations as high as <br /> 150,000 gg/l were detected <br /> I0 BTEX constituents were detected in six of the eight ground water monitoring wells with <br /> concentrations as high as 8,600 µg/1 benzene, 25,000 µg/1 toluene, 3,200 µg/1 ethylbenzene <br /> and 15,000 µg/1 total xylenes in the water samples from MW-1 <br /> • TBA was detected In MW-5 and MW-6 at concentrations of 6 1 µg/1 and 9 4 µg/1, <br /> respectively MTBE was detected In MW-6 at a concentration of 1 1 µg/1 DIPE, ETBE and <br /> TAME were not detected in any of the ground water samples collected <br /> • 1,2-DCA was detected in ground water samples collected from the eight monitoring wells <br /> at the site at concentrations as high as 310 µg/1 (MW-1) EDB was not detected above <br />' laboratory reporting limits in the samples collected during the February 2002 monitoring <br /> event <br />' a The horizontal and vertical extent of contamination related to the former UST has not yet <br /> been defined in soil or ground water <br /> lie <br /> 5.0. RECOMMENDATIONS <br /> Based on the results of this and previous investigations, AGE recommends <br /> I0 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 /> 6.0. 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 hydrogeologic <br /> conditions at the site have been made from a limited number of available data.points(1 a monitoring <br /> wells and ground water samples)and subsurface conditions may vary away from these data points <br /> No other warranty,expressed or implied, is made as to the professional interpretations,opinions and <br /> recommendations contained in this report <br /> Advanced CeoEnvironmental,Inc <br />