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0 <br /> Mr.Michael Inftuna Project 20805-146.006 <br /> May 16, 1996 <br /> Page 2 <br /> TPHG was detected in samples AS-1 through AS-6 at concentrations ranging from 1.7 to <br /> 4.1 milligrams per kilogram (mg/kg). Toluene was detected in samples AS-1 and AS-5 at <br /> concentrations of 0.0066 mg/kg and 0.0067 mg/kg, respectively. Copies of the certified <br /> analytical reports and chain-of-custody records are included as Appendix B. <br /> On behalf of ARCO, EMCON is requesting approval to place the aerated soil as backfill in <br /> the remaining underground storage tank and piping excavation. Additional clean import <br /> will be required to bring the backfill to grade. <br /> If you have any questions,please call. <br /> Sincerely, <br /> EMCON <br /> Mark Capps Jay o son <br /> Staff Geologist Senior Project Geologist <br /> R.G. 5867 <br /> Attachments: Appendix A Soil Aeration Log <br /> Appendix B Analytical Laboratory Reports and Chain-of-Custody <br /> Records <br /> cc: Kyle Christie,ARCO Products Company <br /> SAC\N:\PJO\0805\08051460.6BS-95\pas:l <br />