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t <br /> E � <br /> I ` <br /> 04 March 1996 <br /> 1 AGE-NC Project No 95-0144 <br /> Page 18 of 18 ' ' <br /> _ I <br /> Excavation would require'the removal of overburden soil Impacted sod also extends to,the south <br /> under the building on-site and would not be reachable with excavation Remediation of impacted <br /> ' ground water should be conducted concurrently with soil remediation to prevent re-contamination <br /> of remediated soil Iia-sltu air sparging/vapor extraction appears to be a viable alternative for f <br /> remediation of both soil and ground water in the vicinity of UST Nos 326 Due to the low <br /> t concentration of hydrocarbons at the site, an extraction system using carbon canisters could be used <br /> A sparging / extraction system will also have a secondary effect of bioventing and increasing the <br /> natural degradation rate <br /> 1 <br /> I <br /> 90 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 Evaluations of the geologic/hydrogeologic <br /> conditions at the site for the purpose of flus investigation are made fi om a limited number of available <br /> data points (i e monitoring wells, soil borings) and subsurface conditions may vary away from these <br /> yl data points No other warranty, expressed or implied, is made as to the professional recommendations i <br /> contained in this report <br /> I <br /> 'lie <br /> 1 <br /> P I <br />� I <br /> t " r <br /> 1 'n <br /> X <br /> t Y <br /> I } f <br /> f ` <br /> [ 4 <br /> f t6 w <br /> Y <br /> s I i <br /> I « <br /> V <br /> i f <br />