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} <br /> - <br /> A 3 <br /> 5 <br /> First Quarter 2005 Groundwater Monitoring and Remediation Status Report <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California . <br /> Page 7 ; <br /> concentration appears to by an anomaly, because the mid point sample was reported as having no f <br /> concentrations above the detection limits. ' <br /> System performance totals: i <br /> This Quarter Cumulative <br /> Pounds of TPHg removed: 12 5,260 (835 gallons) <br /> Pounds of benzene removed: 0.0 1.84 fi <br />� a <br /> CONCLUSIONS <br /> Based on groundwater analytical results, concentrations remained consistent this quarter <br /> compared with historical results. Hydrocarbon concentrations classified as TPHd and TPHmo <br /> and TPH kerosene continue to vacillate between each other due to laboratory interpretation of the <br /> results. Wells MW-2,MW-5, MW-6 and MW-12 were below laboratory detection limits for all <br /> analytes. The domestic well sampling results for the three sampling events during the quarter E <br /> r <br /> were below detection limits for all analytes. ; <br /> Groundwater elevations increased an average 0.72 feet this quarter compared with last quarter. <br /> Groundwater isoconcentration maps for TPHg, TPHmo, TPH kerosene, and benzene show the <br /> petroleum hydrocarbon plume defined downgradient, while the isoconcentration map for TPHd <br /> is not defined southeast, and MTBE not defined downgradient. <br /> k <br /> RECOMMENDATIONS <br /> Apex recommends continued remediation and groundwater monitoring to confirm laboratory <br /> data and monthly groundwater sampling of the domestic well. The next monitoring event is <br /> scheduled for May 2005. <br /> ADDITIONAL ACTIVITES PERFORMED AT SITE i <br /> Apex is scheduling the installation of five additional groundwater monitoring wells and two CPT. <br /> borings as outlined in the workplan titled, Workplan for a Limited Subsurface Site Investigation, <br /> t <br /> dated January 14, 2004. ; <br /> Ir <br /> 1 <br />� k <br /> I S <br /> I II <br /> f <br /> I <br />