Laserfiche WebLink
1 <br /> ' 02 December 1998 <br /> AGE-NC Project No 95-0130 <br /> Page 5 of 5 <br /> ' �zg/l MTBE was not confirmed at MW-1 at a detection limit of 1 yg/l, but was detected <br /> utilizing EPA Method 8020 at a concentration of 0 92 jzg/1 <br /> • TAME and ETBE were not detected from laboratory analysis of any ground water samples <br /> • The elevated concentrations of petroleum hydrocarbons detected in samples collected from <br /> wells VW-I C, VW-2A and VW-3A indicate that these wells are within or near the dissolved <br /> petroleum hydrocarbon "core area" of the plume <br /> • The horizontal extent of impacted ground water has not been delineated in any direction <br /> 5.0. RECOMMENDATIONS <br /> Based upon the results of this investigation, AGE recommends <br /> • Installation of the remediation on system u regulatory y p g ry a pproval of the Remedial Action Work <br /> Plan, dated 03 July 1997, submitted to the PHS-EHD for an in-situ soil vapor extraction/air <br /> sparging system within the petroleum hydrocarbon "core area" <br /> • Continued utilization of wells VW-1,VW-2 and VW-3 for characterization of ground water <br /> ' conditions in the "core area" <br /> • Continued quarterly ground water monitoring The next quarterly monitoring and sampling <br /> is scheduled for December 1998 <br /> 1 • Proceed with drilling activities outlined in the Work Plan Addendum -June 1998, dated 23 <br /> June 1998, upon regulatory approval <br /> 1 <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 Iocalities The findings were based upon <br /> analytical results provided by an independent laboratory and a well casing elevation survey <br /> performed by an independent sub contractor Evaluations of the geologic/hydrogeologic conditions <br /> at the site for the purpose of this investigation were made from a limited number of available data <br /> points (i a monitoring 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 /> Advanced GeoEnvironmental,Inc <br /> 1 <br />