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1 <br /> Second Quarter 2002 Groundwater Monitoring Report <br /> Moore Petroleum Buik Plant,5491 F Street,Banta,California <br /> Page 5 <br /> i <br /> Groundwater analytical results are summarized in Table 2. Figures 4 through 7 are <br /> a isoconcentration maps for TPHg, TPHd, benzene, and MTBE, respectively. The laboratory <br /> analytical 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 /> t disposal facility. <br /> 4 CONCLUSIONS AND RECOMMENDATIONS <br /> Groundwater analytical results indicate petroleum hydrocarbons have been reduced in <br /> concentrations at the site. MW-2, MW-3, MW-4, MW-5, and MW-9 were non-detect.for all <br /> analyzed constituents. <br /> The Rhodes domestic well was sampled on April 30, 2002, May 13, 2002, and June 18, 2002. <br /> ' Concentrations were non-detect for all analyzed constituents. <br /> The isoconcentration maps (Figures 4-7) depict concentrations isolated onsite except for MTBE <br /> (Figure 7) which shows the MTBE plume offsite to the east. However, the domestic well east of <br /> MW-12 is non-detect, defining the extent of MTBE to the east. <br /> Apex recommends continuing quarterly groundwater monitoring to confirm laboratory data and <br /> monthly groundwater sampling of the domestic well. The next monitoring event is scheduled for <br /> July 2002. <br /> i <br /> The SVE system was installed at the site 'and started on June 17, 2002. A permit compliance <br /> source test was conducted on July 2, 2002. Source test results and subsequent system operating <br /> data are contained in the forthcoming Source Test Results Report. The Source Test Results <br /> Report will be finalized and distributed in August 2002. <br /> Apex has received an Authority to Construct (A/C) permit from the SJVUAPCD for a new vapor <br /> extraction unit and treatment system. System installation and start up is pending delivery of the <br /> system. It is anticipated that the system will be installed and started In May 2002. <br /> l <br /> s <br /> f � <br /> { <br /> s <br />