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I22 April 2002 <br /> AGE-NC Project No 98-0511 <br /> Page 7 of 7 <br /> • Samples from MW-4, MW-6 and MW-8 had less than detectable concentrations of all <br /> analytes <br /> • The MTBE concentrations in the ground water samples collected from MW-1 (200 µg/1), <br /> MW-3 (15 µg/1) and MW-5 (240 µg/1) are above California's Primary Maximum <br /> Contaminant Level (13 µg/1) for MTBE <br />' • Hydrocarbon-Impacted groundwater is not defined vertically and laterally along the east side <br /> of the site <br /> 5.0. RECOMMENDATIONS <br /> Based upon data collected from the site, AGE recommends <br /> • Continued quarterly ground water monitoring <br /> • Installation of additional ground water monitoring wells to define the eastern edge of <br />' contaminated soil and ground water, a work plan is in preparation <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 field <br /> measurements and 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 a ground water samples) and subsurface conditions may <br /> vary away from these data points No other warranty, expressed or implied, is made as to the <br /> professional interpretations, opinions and recommendations contained in this report <br /> 1 <br /> 1 <br /> Advanced GeoEnvironmental,Inc <br />