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I <br /> lie 28 May 2003 <br /> AGE-NC Project No 95-0173 <br />' Page 8 of 8 <br /> I6.0. RECOMMENDATIONS <br /> Based upon fourth quarter 2002 data collected from the site, AGE recommends <br />' • Continued quarterly groundwater monitoring and sampling of wells MW-l through MW-13, <br /> AW-1A, AW-1B, AW-2A and AW-2B, ground water sampling results will be used to <br /> monitor progress of the SVE and IAS remediation system <br />' * Continued operation of the on-site SVE and IAS remediation system,remediation progress <br /> will be reevaluated on a quarterly basis <br /> To address deeper petroleum hydrocarbon-impacted ground water at the site, AGE proposed that at <br /> I least one additional remediation alternative be evaluated due to the modest clean-up effectiveness <br /> being encountered utilizing IAS The well-defined,laterally continuous,sandy nature of Hydrologic <br /> Unit 2 (38 feet to 65 feet bsg) is suitable for a ground water extraction system screened solely <br /> through Hydrologic Unit 2, implementation of a ground water pump-and-treat technology would <br /> augment the IAS clean-up efforts in Hydrologic Unit 1 <br /> A revision to Work Plan Addendum (dated 06 November 2002) was approved by the SJCEHD by <br />' letter dated 18 November 2002 for installation of one ground water extraction well and performance <br /> of ground water pump testing The ground water extraction well was installed at the site in January <br /> I 2003,well development activities were performed on the well in February 2003 AGE has tentatively <br /> scheduled ground water pump testing to commence at the site in June 2003 <br /> 7.0. LIMITATIONS <br /> Our professional services were performed using the degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluation of the hydrogeologic <br /> conditions at the site for the purpose of this investigation is made from a limited number of available <br /> data points(e g ground water and SVE air flow samples),and subsurface conditions may vary away <br /> from 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 /> I <br /> lie <br /> iAdvanced GeoEnvironmentai,Inc <br /> i <br />