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w• • Y <br /> 15 December 2003 <br /> AGE-NC Project No 95-0109 <br /> Page 6 of 6 <br /> An ozone generator is utilized to produce gaseous ozone which is injected into the subsurface via <br /> microsparge points The "microbubbles" (approximately 50 micrometers) are forced out into the <br /> surrounding saturated soil and react with the target analytes, producing carbon dioxide and water <br /> The frequency and duration of ozone injection periods can be regulated at the ozone generator <br /> control box Initially, operation of the ozone injection system will be based on the manufacturer's <br /> recommendations Injection rates, frequency and duration may be adjusted to compensate for site <br /> conditions during the pilot test The ozone sparge feasibility test will be performed for approximately <br /> 24 week,ground water samples will be collected monthly from the existing monitoring wells MW-1, <br /> MW-14, MW-4 and EW-1 Samples will be analyzed at a DHS-certified laboratory to evaluate the <br /> effectiveness of the ozone sparge system The grab water samples will be analyzed for the following <br /> constituents <br /> a TPH-g in accordance with EPA Method 8015 Modified, <br /> o BTEX compounds in accordance with EPA Method 8020 and <br /> 0 1,2-DCA by EPA Method 8260 Modified <br /> Iron by EPA method 6010B <br /> Laboratory reports for ground water analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain of custody documentation will be presented In a report <br /> with findings and recommendations <br /> Additionally, dissolved oxygen and oxygen reduction potential (ORP) will be measured in-situ on <br /> a monthly basis <br /> Advanced GeoEnviron mental,Inc <br />