Laserfiche WebLink
Fourth Quarter 2005 Groundwater Monitoring and Remediation Status Report <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California <br /> Page 8 <br /> System performance totals: <br /> This Quarter Cumulative <br /> Pounds of TPHg removed: 6.0 5,275 (837 gallons) <br /> Pounds of benzene removed: 0.0 1.84 <br /> Ozone System: <br /> The ozone system consists of an oxygen concentrator, an ozone generator, a supply compressor, <br /> conveyance tubing, and individual injection points, or"sparge"points. The ozone generator <br /> produces ozone for chemical oxidation of organic chemicals. An oxygen concentrator increases <br /> the ozone production by three times. The dual-contained conveyance tubing provides routing of <br /> the generated ozone to the selected sparge points. The sparge points provide a micro-porous <br /> medium to produce small bubbles of ozone for mixing into the surrounding groundwater <br /> formation. <br /> System startup date: February 17, 2005 <br /> Active sparging wells: OS-1 through OS-10 <br /> The ozone system operated normally for the period covered by this report. <br /> CONCLUSIONS <br /> Based on groundwater analytical results, concentrations remained consistent this quarter <br /> compared with historical results. Hydrocarbon concentrations classified as TPHd, TPHmo, and <br /> TPH as kerosene continue to vacillate between each other due to laboratory interpretation of the <br /> results. Groundwater monitoring analytical results showed concentrations remain concentrated <br /> to the eastern portion of the site and the remediation system continues to be effective at reducing <br /> the plume size at the site. All concentrations detected were within historical ranges. <br /> The domestic well sampling results for the three sampling events during the quarter were below <br /> detection limits for all analytes. <br /> Groundwater elevations decreased an average 2.09 feet this quarter compared with last quarter. <br /> k Groundwater isoconcentration maps for TPHg, TPHd, TPHmo, TPHkerosene, and benzene show <br /> the petroleum hydrocarbon plume defined downgradient, while the isoconcentration map for <br /> MTBE is not defined downgradient. <br />