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k <br />' 13 July 1999' <br /> i AGE-NC Project No 95-0142 l <br />' Page 4 of 4- <br /> Significant concentrations of TPH-g and benzene were detected in the samples from the <br />' deeply screened monitoring well MW-6 (screened 70,to 80 feet bsg), approximately 45 feet <br /> below ground water <br />' 5.0. RECOMMENDATIONS <br />' Based upon the data collected to date, AGE recommends <br /> • Continued quarterly monitoring;-the next quarterly ground water sampling and monitonng <br /> Ievent should be scheduled for October 1999 <br /> • Installation of two additional deep aquifer zone ground water monitoring wells, with depth- <br /> discrete well screens <br /> • Installation of additional soil vapor extraction and/or in-situ air sparging wells needed for k <br /> active remediation at the site, as referred to in'the PHS-EHD approved Corrective Action <br />' Plan <br /> 6.0. LIMITATIONS <br /> IOur 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/hydrogeoIogic <br /> conditions at the site for the purpose of this investigation were made from a limited number of data <br /> points (n a momtonng-well 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 /> recommendations contained in this report <br /> _ z <br /> I <br /> I <br /> Advanced GeoEnviron mental, Inc <br />