Laserfiche WebLink
Fourth Quarter 2001 Groundwater Monitoring Report <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California <br /> Page 5 <br /> Analytical results are summarized in Table 2. Figures 4 through 7 are isoconcentration maps for <br /> TPHg, TPHd, TPH motor oil, and sum of oxygenates, respectively. The laboratory analytical <br /> reports and chain-of-custody forms are included in Appendix C. <br /> 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 /> CONCLUSIONS AND RECOMMENDATIONS <br /> Groundwater analytical results indicate shallow groundwater beneath the site has been impacted <br /> by petroleum hydrocarbons. The domestic well remains non-detect for all analyzed constituents. <br /> • MW-1: TPHd, TBA, and MTBE were detected this quarter. TBA was a historic high <br /> for this location and TPH motor oil decreased from 4,000 micrograms per liter (ug/L) <br /> to non-detect. This could be laboratory reporting error because TPHd increased to <br /> 2,400 ug/L from non-detect. Apex suspects that the TPHd reported is actually TPH <br /> motor oil. <br /> a <br /> • MW-2: Continues to be below detection limits except for TPH motor oil at 110 ug/L <br /> which decreased from last quarter. <br /> • MW-3: TPHd was the only constituent above detection limits at 730 ug/L. <br /> • MW-4A: All analyzed constituents were below detection limits except for MTBE, <br /> which was detected at 16 ug/L and TPH motor oil at 77 ug/L. <br /> • MW-5: All analyzed constituents were below detection limits. <br /> • MW-7: TPHg, TPHd, benzene, and ethylbenzene were detected this quarter all within <br /> historic ranges. <br /> • MW-8: TPHg, TPHd, ethylbenzene, and MTBE were detected this quarter. TBA, <br /> TPH kerosene, and TPH motor oil decreased to non-detect. <br /> • MW-9: All analyzed constituents were below detection limits except TPH motor oil. <br /> • MW-10: TPHg increased and TPHd decreased slightly. Benzene (5.7 ug/L) and <br /> MTBE(9.3 ug/L) were also detected this quarter. <br />{ <br /> • MW-11: TPH motor oil and MTBE were the only detected constituents this quarter. <br /> 1 <br /> I <br /> i <br />