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Status Report <br /> ARCO Facility No 6100 <br /> Tracy, California <br /> Page 6 <br /> Vapor extraction well VW-1 was not sampled due to the presence of free product in the <br /> well Groundwater samples were submitted to Sequoia and analyzed for TPHG, BTEX <br /> using USEPA Method 8015/8020 DHS LUFT and MTBE, ETBE, TBA, D1PE, and <br /> TAME using USEPA Method 8260A The samples were also analyzed for nitrate (as <br /> NO3) using USEPA Method 300 0 and for fecal coliform using USEPA Method <br /> SM 9221 <br /> Concentrations of TPHG, BTEX, and MTBE were present in the samples collected from <br /> each well, with the exception of VW-5, which had low concentrations of benzene, total <br /> xylenes, and MTBE Highest concentrations were detected in the sample collected from <br /> well VW-4 (TPHG at 605,000, Benzene at 33,900, and MTBE at 1,890 µg/L) Nitrate <br /> and fecal coliform were not detected in any of the samples collected from the vapor <br /> extraction wells <br /> If you have any questions regarding this report, please contact Jay Johnson at <br /> (530) 676-6000 <br /> Sincerely, <br /> DELTA ENVIRONMENTAL CONSULTANTS, INC. <br /> 4cott`BittAin&ger y o n R tG - <br /> Staff <br /> Geologist Pr ect anager <br /> Attachments Table 1 Groundwater Monitoring Summary, Monitoring Well MW-1 <br /> Table 2 Groundwater Levels, February 8, 2001, Monitoring Well <br /> MW-1 <br /> Table 3 Groundwater Level Data, Vapor Extraction Wells <br /> Table 4 Groundwater Analytical Summary <br /> Figure 1 Site Location Map <br /> Figure 2 Site Plan <br /> Appendix A Field Data Sheets <br /> Appendix B Certified Analytical Reports and Cham-of-Custody <br /> Documentation <br /> cc Mr Paul Supple, Atlantic Richfield Company <br /> Mr Marty Hartzel, California Regional Water Quality Control Board <br /> C 1ARC0161001Status Repo,616100 status-rpt 0401 doc <br />