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ql � <br /> • 02 April 2004 <br /> AGE-NC Project No 95-0143 <br /> Page 4 of 4 <br /> samples collected from monitoring well MW-3 and were well above the DHS's Maximum <br /> Contaminant Levels for BTEX in drinking water <br /> • During the October 2003 sampling event, target analytes were not detected in samples <br /> collected from wells MW-10, MW-14, MW-16, MW-17, MW-23 and MW-24 <br /> • The ozone-sparging unit has operated continuously at the site since July 2003, to date, no <br /> obvious changes in contaminant levels have been observed in the monitoring wells since <br /> ozone-sparging startup <br /> 5.0. RECOMMENDATIONS <br /> It is AGE's understanding that the monitoring well network and ozone-sparging system at the site <br /> was abandoned during first quarter 2004 as part of redevelopment activities Based on the <br /> concentrations of petroleum hydrocarbons detected in on-site monitoring wells, AGE recommends <br /> replacement of the monitoring wells located near the former UST location In addition, remedial <br /> action should be initiated to address the petroleum hydrocarbon-impacted ground waterplume at the <br /> 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 ground water <br /> conditions at the site have been made from a limited number of available data points(i e monitoring <br /> wells and ground water samples), and subsurface conditions may vary through time and with <br /> distance 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 /> Advanced GeoEnvironmental,Inc <br />