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' 04 rune 2001 <br /> • AGE-NC Project 99-0570 <br />' Page 3 of 3 <br />' BTEX compounds,were detected in samples MW-1 and MW-2 at concentrations as high as 260 dig/I <br /> (ethylbenzene) <br />' MTBE was detected in samples MW-1, MW-2 and MW-3 at 130 Rg/l, 23 pg/1 and 51 �Lg/l, <br /> respectively by EPA Method 8260 No other fuel oxygenates were detected in any of the samples <br />' Laboratory results of water samples analyzed for petroleum hydrocarbons are summarized in Tables <br /> 2 and 3 The laboratory i eports for the quarterly monitoring event (MAI Laboratory ID No 57431 <br /> to 57435) QA/QC reports and chain-of-custody form are included in Appendix B <br /> 1 <br /> 4.0. SUMMARY AND CONCLUSIONS <br />' Based on the findings from this investigation, AGE draws the following conclusions <br />' Ground water on the site was flowing toward the north from the former dispenser area at a <br /> hydraulic gradient of 0 029 feet/feet <br /> e MTBE was detected in three ground water samples,with the highest dissolved concentrations <br /> occurring east of the former UST area, at concentiations as high as 130 µg/l <br /> • TPH and BTEX was detected in two ground water samples <br /> 5.0 RECOMMENDATIONS <br /> AGE recommends that quarterly monitoring continue <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 ofthe geologic conditions <br /> at the site have been made from a limited number of available data points (i e monitoring wells and <br /> ground water samples) and subsurface conditions may vary away from these data points No other <br /> warranty, expressed or implied, is made as to the professional recommendations contained in this <br /> report <br /> i <br /> IAdvanced GeaEnvironmental,Inc <br />