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r V <br /> ! <br /> tt � 'y <br /> February 2005 ; tik <br /> AGE' ect.Mo. 9 `4504.-NC-Pro8 Y r <br /> „ <br /> , r w <br /> Page 3 of 3--;, 7. <br /> l <br /> forin'are included in-Appendix C: ry�J <br /> 4.0.' SUMMARY AND.CONCLUSIONS <br /> Based on the findings from this investigation;AGE concludes: <br />.;, Ground water elevations at the site-rariged'froin:19.16Ifeet {MW-3) to 24.0.7'feef(M`1V 2)':r <br /> below MSL. Ground water flow,was inferred to be flowing toward-the southwest under a, ' <br /> hydraulic'gradient of approximately 0.01 ft/ft: t ' <br /> TPH-g and MTBE.were detected in the ground water sari pie collected from well MW-.1 at.'.` . ; <br /> i equivalent concentrations of 300 µg/l. : ' <br /> The lateral extent of the dissolved MTBE lume.is not yet defined to'the;north or west of the ` <br /> site. <br /> .' 5.0. RECOMMENDATIONS <br /> Based on'the findings of the environmental activities recounted,in this report, AGE recommends <br /> continuation of quarterly ground water monitoring at the site; the next Monitoring event was <br /> ' performed in November 2004.Additional site assessment work,including cone penetrometer testing <br /> and the installation,of additional monitoring wells,should be performed to determine the vertical and <br /> lateral extents of dissolved MTBE at the site. Specifically, one shallow monitoring well should,be . <br /> installed at'the eastern edge.of the northern driveway, and one deep monitoring well' should:be 4- <br /> installed at the location of well MW-l: <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 /> 1 ' upon analytical results provided by an independent laboratory: Evaluations 'Of, the. <br /> geologic/hydrogeologic conditions at the.site for.the purpose;of this investigation are made from a <br /> limited number of available data points(i.e.,ground water samples),and subsurface conditions may N <br /> r. <br /> vary away_from these data points..No other'warranty, expressed.or implied, is'madeas to the ' <br /> professional interpretations, opinions, and recommendations contained in this report. <br /> J <br /> Advanced GeoEnvironmental,Inc.' +,, <br />