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First Quarter 2002 Groundwater Monitoring Report <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California <br />!. Page 5 <br /> j Groundwater analytical results are summarized in Table 2. Figures 4 through 7 are <br /> isoconcentration maps for TPHg, TPHd, TPH motor oil, and sum of oxygenates, respectively. <br /> The laboratory analytical reports and chain-of-custody forms are included in Appendix C. <br /> j All purged and recovered liquids are stored temporarily on site in Department of Transportation- <br /> approved, 55-gallon drums pending removal from the site by a licensed hauler to an appropriate <br /> disposal facility. <br /> 1 ` <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Groundwater analytical results indicate petroleum hydrocarbons remain concentrated at the site. <br /> Results for the monitoring wells are as follows: <br /> i • MW-l: Detected petroleum hydrocarbon concentrations have decreased from last <br /> quarter. <br /> • MW-2: The only constituent detected was TPHmo at 510 micrograms per liter(ug/L), <br /> t <br /> an increase from last quarter. <br /> • MW-3: The only constituent detected was TPHd at 450 ug/L, a decrease from last <br /> quarter. <br /> • MW-4A: TPHmo and MTBE were the only constituents above reporting limits. <br /> TPHmo increased while MTBE decreased. <br /> • MW-5: The only constituent detected was TPHmo at 430 ug/L. <br /> • MW-7: Detected constituents from last quarter increased this quarter. <br /> • MW-8: Detected constituents were within historic ranges. <br /> • MW-9: The only constituent detected was TPHmo at 190 ug/L. <br /> • MW-10: TPHg and benzene decreased while TPHd increased slightly. All other <br /> constituents were non-detect. <br /> • MW-11: TPHmo and MTBE increased this quarter. All other constituents were non <br /> detect. <br /> • MW-12: MTBE was the only detected constituent at 29 ug/L, a decrease from the <br /> .J fourth quarter. <br />