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1 <br /> Interim Results Report for Ozone Sparge Well Installation 1 <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California ! <br /> Page 6 <br /> Ozone Sparge Compressor <br /> On February 7 through 11, 2005, Apex connected each sparge point with double-contained 318- <br /> inch polyethylene tubing. Trenching and horizontal directional borings were utilized to install <br /> the ozone conveyance tubing to each sparge point, on and off site. An ozone generator will be <br /> used in combination with a sparge compressor and a series of automated valves to feed the ozone <br /> sparge points on a schedule. Tubing runs from the remediation compound to each of the nine <br /> sparge points. <br /> Power for the remediation equipment will be supplied off the existing breaker box located in the <br /> remediation compound. Scheduled startup for the ozone sparge compressor was February 17, <br /> 2005. All construction was completed in accordance with the rules and regulations set forth by <br /> f the San Joaquin County Building Codes. <br /> CONCLUSIONS k <br /> 4 <br /> According to the soil analytical data from the installation of nine ozone sparge wells, sample OS- <br /> 6-10 contained 14 mg/kg of TPHmo, sample OS-7-25 contained 0.031 mg/kg of MTBE, sample <br /> OS-10-10 contained 45 mg/kg of TPHg, 0.660 mg/kg of TPHd, 0.26 mg/kg of kerosene, 0.10 <br /> mg/kg of ethyl-benzene and 0.39 mg/kg of total xylenes and sample OS'-10-25 contained 1.2 <br /> mg/kg of TPHg, 0.0034 mg/kg of TPHd 0.0055 mg/kg of ethyl-benzene and 0.016 mg/kg of total <br /> xylenes. Analytical results for all other soil samples collected at the subject site were below the <br /> detection limit. ' <br /> RECOMMENDATIONS <br /> Apex recommends continued quarterly groundwater sampling to monitor the effectiveness of the <br /> chemical oxidation in reducing groundwater constituent concentrations,' <br /> l <br /> �J <br />