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r <br /> 15 November.2002 <br /> -AGE-NCProject No�95 0173 <br /> Y Page 8 of 8 <br /> IC, <br /> `- S . <br /> ..Soil-gas concentrations have consistently been below 1,000 [t for nine consecutive monthly air <br /> f sampling events-(December 2001-);,therefore an activated carbon SVE system may be abetter cost _ <br /> effective choice-to.remediate the site to acceptable levels.-Operation'of an activated'-carbon SVE- -� <br /> _ system ahthe site should be capable or removing between 70 and 80 percent of volatile contaminant r. <br /> - :--by volume: The-activated carbon SVE system will still provide recovery and treatment of Ah' <br /> "sparged".coritiaminants at a much lower energy cost. AGE.believes that a thermal/catalytic system <br /> LL --is no longer required at this time since there is a relatively small amount of impacted soil within the r <br /> present-vadose zone <br /> _4 <br /> = 7:0. '.LIMITATIONS <br /> Ourprofessional services.were performed.using the'deg e_e'ofcare and skill ordinarily-exercised by_­'. <br /> environmental consultants practicing in this or similar localities. Tlie-findi'ngs_were.based'mainly <br /> upon analytical.results provided by an independent;lab oratory..:Evaluation-of the-hydrogeoIogic.. <br /> conditions at the site.for the purpose,of this investigation`'is made from'a limited'numlier of available <br /> ` data points(e.g.groundwater and-SVEtair flow sam les 'and subsurface conditions may va away <br /> p )� Y . rY Y <br /> from these-data points. No other-warranty, expressed or implied, is.;niade as to the -,professional.-- <br /> CJF_ <br /> 4 <br /> interpretations, opinions and recommendations contained in this report. <br /> - <br /> Fil <br /> Advauivd GeoEnvironmental, <br />