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Second Quarter 2004 Groundwater Monitoring/Remediation Status Report <br /> Moore Petroleum Bulk Plant,5491 F Street,Santa,California <br /> Page 6 <br /> System performance totals: <br /> F <br /> This Quarter Cumulative <br /> Pounds of TPH removed: 428 pounds (68 gallons) 5,227 pounds(830 gallons) <br /> Pounds of benzene removed: 0.02 pounds 1.84 pounds <br /> Status of system operation during reporting period/ reasons for downtime: <br /> During this reporting period, April 1, through June 30, 2004, the SVE system did not operate <br /> continuously. Apex personnel recorded system shutdowns on April 13 and May 27, 2004. Both <br /> system shut downs were due to'-the high temperature flame interlock, so the system was restarted <br /> and adjusted. According to hour meter readings and field data, the system operated for a total of <br /> 64 days during this period. A decrease in influent concentrations for TPHg and benzene were <br /> reported for this quarter. All effluent samples collected during this reporting period were non- <br /> detect for TPHg and benzene concentrations. <br /> Vapor Analysis Performed: <br /> Analysis Abbreviation Designation USEPA Method No. <br /> Total Petroleum Hydrocarbons Gas-Range <br /> as Gasoline TPHg Hydrocarbons8260B <br /> Benzene <br /> Toluene Aromatic <br /> Ethylbenzene BTEX Volatile 8260B <br /> Xylenes (Total) Organics <br /> M _F <br /> ethyl Tertiary Butyl Ether MTBE Fuel 82608 <br /> Ox genote <br /> 4 <br /> CONCLUSIONS <br /> Based on groundwater analytical results, concentrations remained consistent this quarter <br /> compared with last quarter. Hydrocarbon concentrations classified as TPHd and TPHmo <br /> continue to vacillate between each other due to laboratory interpretation of the results. The <br /> domestic well sampling results for all three sampling events during the quarter were below <br /> detection limits. The proposed ozone system will attenuate these heavy range hydrocarbons. <br /> Groundwater elevations increased an average 2.18 feet this quarter compared with last quarter. <br /> 1� <br /> 4 <br />