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= M = MW = W = = = M = I <br /> In-situ Chemical Oxidation <br /> Former <br /> Retail Gas Station Site — <br /> in Dissolved-phaseReduction <br /> • <br /> Concentrations after 31V10nths oOperation <br /> Pre-remediation: <br /> - BTEX concentration on-site up to 26, 300 ppb. BTEX concentration <br /> above 400 ppb five wells. <br /> - MTBE concentration above 400 ppb at nine wells. <br /> - TBA concentration above 50 ppb at six wells. <br /> Following 3 months of system operation: <br /> - Highest BTEX concentration 250 ppb. Only three of 45 sampling <br /> locations indicated detectable concentrations of BTEX . <br /> - Only two wells with MTBE concentrations > 400 ppb. <br /> Only two wells with TBA concentrations > 50 ppb. <br /> APPLIED PROCESS TECHNOLOGY, INC. <br />