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25 January 2005 <br /> AGE-NC Project No 01-0827 <br /> Page 5 of 5 <br />' in TPH-g and BTEX concentrations during the remediation period are suggesting continued <br /> desorption of hydrocarbons from soil into ground water <br />' 5.0. RECOMMENDATIONS <br />' Based on the findings of the remediation activities recounted in this report, AGE recommends <br />' • Continued quarterly ground water monitoring,the next monitoring event is scheduled for late <br /> in the first quarter 2005 <br /> • Limit the quarterly monitoring schedule sampling to impacted ground water wells,eliminate <br />' the non-impacted wells, located more distal to the UST area, from the sampling program <br /> • Continue operation of the ozone air spargmg system, with consideration of the installation <br />' of one additional ozone sparge well for the infection of ozone-enhanced-air <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 hydrogeologic conditions <br />' at the site for the purpose of this investigation was made from a limited number of available data <br /> points(e g 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 opinions, findings and <br />' recommendations contained in this report <br /> 1 <br /> 1 <br /> I <br /> I <br />' Advanced GcoEnvironmental,Inc <br /> I <br />