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t <br /> 14 July 2005 <br /> . AGE-NC Project No 00-0696 <br /> IPage 4 of 4 <br />' collected from well MW-3 at the following concentrations 70 µg11 benzene, 140 Pg/1 <br /> toluene, 150 µg/1 ethylbenzene, and 338 µg/1 total xylenes <br /> • The concentration of benzene in well MW-3 exceeds the DHS's Maximum Contaminant <br />' Level (MCL) of 1 µg/l for drinking water <br /> • The lateral extent of petroleum hydrocarbon contamination is defined in the east by <br /> monitoring well MW-4 and in the southwest by wells MW-1 and MW-2 The lateral extent <br /> of contamination is not yet defined north of well MW-3 <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of the environmental activities recounted in this report,AGE recommends the <br /> continuation of quarterly ground water monitoring events The next event has been scheduled for <br />' August 2005 Additional monitoring points north of well MW-3 should be installed and a sensitive <br /> receptor survey should be conducted to identify and locate sensitive receptors, including wells, <br /> potentially affected by the petroleum release, and to identify and locate potential vertical conduits <br /> i • <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 upon <br />' analytical results provided by an independent laboratory Evaluation of the hydro geologic conditions <br /> at the site for the purpose of this investigation was made from a limited number of available data <br /> points(I e ,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 /> I <br /> • <br /> Advanced GeoEnvironmental,Inc <br />