Laserfiche WebLink
, <br /> 20 October 2003 <br /> AGE-NC Project No 95-0185 <br /> Page 6 of 6 <br /> 1 5 0 RECOMMENDATIONS <br /> Based upon the results of the May and,lune 2003 monitoring events, AGE recommends <br /> • Continued quarterly ground water monitoring at the site for dissolved TPH-d and TPH-g, the <br /> next monitoring event is scheduled for September 2003 <br /> • Operation of an active free-product recovery system at well MW-4 <br /> The ozone-sparging pilot test suggests that rapidly increasing concentrations of TPH-d and TPH-g <br /> In wells MW-4 and off-site well MW-1 may be attributed to re-mobilization and migration of these <br /> contaminants by the ozone-spargzng process However,before any additional evaluation ofthe ability <br /> of ozone-spargtmg to attenuate the high concentrations of TPH-d and TPH-g should be conducted, <br /> the location of the main petroleum hydrocarbon-impacted zone, at the northeast cornier of the site <br /> and off-site towards the northeast, requires addressing the problem of containment of off-site <br /> migration of the contatnmants <br /> i6.0 LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordmanly exercised by <br /> jenvironmental consultants practicing In this or similar localities The findings were based on <br /> analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> conditions at the site for the purpose of this investigation were made from a limited number of <br /> available data points (i e ground water samples) and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or implied, Is made as to the professional <br /> interpretations, opinions and recommendations contained in this report <br /> r <br /> Advanced GeoEnvironmental,Inc <br />