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Ms. Letitia Briggs;. Project 20805-224.002 <br /> March 24, 1999 F <br /> Page 3 <br /> presents a summa 'ry of the analytical results. ,Copies of certified analytical reports and •chain-of- <br /> j - custody documentation are presented in Appendix B. <br /> Overexcavation;Verification Soil Sample Results <br /> TPHG was detected in two of the three overexcavation soil samples at concentrations of 9.18 <br /> mg/kg in PL-8 (5') and 1.59 mg/kg in PL-8SW (3.5'). Benzene and MTBE were detected in <br /> sample PL-8 {5') at a concentrations of 0.0609 mg/kg and 11�1 mg/kg, respectively. Copies of <br /> certified analytical!reports and chain-of-custody documentation"are presented in Appendix B. <br /> k <br /> Soil Stockpile Sample Results <br /> Soil stockpile sample SP-1 contained TPHG, toluene, ethylbenzene, total xylenes, and total lead <br /> concentrations of .8.06 mg/kg, 0.228 mg/kg, 0.133 mg/kg,'9 1.07 mg/kg, and 32.2 mg/kg, <br /> respectively. Copies of certified analytical reports and chain-of-custody documentation for the <br /> stockpile samples are presented in Appendix B. <br /> i CONCLUSIONS ` <br /> Verification soil samples contained non-detectable to low concentrations of TPHG, benzene, <br /> toluene, ethylbenzene, total xylenes, and MTBE. Tert-butyl alcohol was detected at a <br /> concentration of 44.0 mg/kg in PL-10 (4.3'). <br /> I' Sincerely, <br /> Pinnacle <br /> David Foley Mark Capps, R.G 6561 <br /> 7. <br /> Staff Geologist Project Geologist <br /> F CP1E:1ARCO\54691REPORTS\5469P102.DOC-95Is :i <br />