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14 September 2004 <br /> AGE-NC Project No 03-1100 <br /> Page 8 of 9 <br /> 37 1N-SITU OZONE SPARGING PILOT TEST <br /> The typical ozone system is an in-situ air stripping process utilizing fine bubbles of ozone-rich air, <br /> injected into saturated soil to desorb and decompose dissolved petroleum hydrocarbon constituents <br /> An ozone generator is utilized to produce the gaseous ozone, which is infected into the subsurface <br /> via 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 infection periods can be regulated at the ozone generator <br /> control box Initially, operation of the ozone infection 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 start-up monitoring will be performed for <br /> approximately six months, ground water samples will be collected and analyzed and dissolved <br /> oxygen levels and ORP levels will be monitored monthly from the existing monitoring well network <br /> to evaluate the effectiveness of the ozone sparge system Groundwater samples will be collected and <br /> analyzed in accordance with current ground water sampling and analysis procedures <br /> 3 S REPORTING <br /> As remediation of hydrocarbon-impacted soil and ground water at this site is implemented,quarterly <br /> reports will be submitted to the SJCEHD and the CVRWQCB The quarterly reports will include <br /> analytical results and field readings, and will assess remedial progress at the site Quarterly reports <br /> will be reviewed and signed by a California Registered Geologist <br /> 4 0. CLEAN UP GOALS <br /> All ground water in the state of California is considered to be a potential drinking water source <br /> Therefore, clean-up goals for soil and ground water should be established that will protect the <br /> beneficial use of the ground water <br /> 41 CLEAN UP GOALS FOR GROUND WATER <br /> AGE proposes clean-up goals for ground water based on the Maximum Contaminate Level(MCL) <br /> for the constituents of concern in drinking water <br /> The constituents of concern and the associated MCLs are <br /> Advanced GeoEnvironmental,Inc <br />