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r r01 September 2005 AGE-NC Project No 95-0173 rPage 10 of 10 r Although analytical results of SVE air flow samples suggested near non-detectable levels, operation of the existing SVE remediation system still appears to have a positive and beneficial effect In mass removal of hydrocarbon-Impacted soil vapor and dissolved r hydrocarbons, albeit at low concentrations Therefore, AGE recommends continued operation of the on-site SVE remediation system and will be re-evaluated on a quarterly basis Based on the current data, AGE anticipates operation of the SVE remediation system rat least through the 2005 calendar year • SVE and IAS operations should be temporarily suspended for a minimum of one-month at r the site to evaluate whether or not ground water `rebound' occurs In selected ground water monitoring wells If concentrations increase or plateau In the area of well MW-4, it may be necessary to augment the existing SVEJAS remediation system by Installing at least one radditional SVE and IAS wells In the area of well MW-4 • Confirmation soil borings should be advanced at the site to at least 70 feet bsg to evaluate rsoil and ground water clean-up progress r6.0. LIMITATIONS Our professional services were performed using the degree of care and skill ordinarily exercised by renvironmental consultants practicing In this or similar localities The findings were based mainly upon analytical results provided by an Independent laboratory Evaluation of the hydrogeologic conditions at the site for the purpose of this Investigation Is made from a limited number of available rdata points (e g ground water and soil vapor samples), and subsurface conditions may vary away from these data points No other warranty, expressed or Implied, Is made as to the professional Interpretations, opinions, and recommendations contained In this report r r r r Advoneed GcoEn"ronmental,Inc r