ARCHIVED REPORTS_XR0005829 CASE 1

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Mr Michael Infurna Project 20805-151-004 August 25, 2000 Page 6 UST Overexcavation Samples (17 feet bgs) Benzene was detected in sample T-3-N at a concentration of 0 0733 mg/kg and sample T-2-N contained TBA at a concentration of 23 2 mg/kg, both samples were collected at 17 feet bgs MTBE was detected in four of ' the five samples collected at 17 feet bgs at concentrations ranging from 0 103 mg/kg to 20 8 mg/kg No other analytes were detected in samples collected at 17 feet bgs ' Dispenser Confirmation Samples TPHG was detected in four of the eight dispenser samples at concentrations ranging from 36 mg/kg to 1,000 mg/kg Benzene and MTBE ' were detected in sample D-6 at concentrations of 12 mg/kg and 110 mg/kg, respectively Toluene and ethylbenzene were detected in two of the eight samples and total xylenes were detected in six of the eight samples at concentrations ranging from 0 01 mg/kg to ' 200 mg/kg Total lead was detected in two samples at concentrations of 21 mg/kg and 3 4 mg/kg ' Dispenser Overexcavation Samples The three samples collected after overexcavation of the dispenser areas (D-3, D-6, and D-7) contained TPHG concentrations ranging from 609 mg/kg to 1,430 mg/kg and two of the three samples contained total xylenes concentrations of 7 47 mg/kg and 3 75 mg/kg Benzene did not exceed the raised reporting limit of 1 25 mg/kg MTBE was detected in the sample collected beneath dispenser D-6 at a concentration of 0 204 mg/kg No other analytes were detected Product Line Confirmation Samples TPHG and benzene were detected in sample PL-6 at concentrations of 2 1 mg/kg and 0 0066 mg/kg, respectively Toluene was 1 detected in three of the 10 samples at concentrations ranging from 0 0052 mg/kg to 0 0062 mg/kg, and ethylbenzene was detected in sample PL-6 at a concentration of 0 014 mg/kg Total xylenes were detected in four of the samples at concentrations L ranging from 0 0084 mg/kg to 0 1 mg/kg MTBE was detected in sample PL-1 at a concentration of 4 4 mg/kg No other analytes were detected in samples collected from beneath the product lines Certified analytical reports and chain-of-custody Idocumentation are presented in Appendix B Product Line Overexcavation Samples Sample PL-1 collected at 4 5 feet bgs, was non-detect for TPHG, BTEX, oxygenates, and total lead Vent Line Confirmation Samples MTBE was detected in sample VL-4, collected beneath the former vent lines, at a concentration of 0 1 mg/kg No other analytes were detected in samples collected from beneath the vent lines Certified analytical reports and chain-of-custody documentation are presented in Appendix B SAC\\\SACRFPI\COMMON\Consulting\data\Shared\Projects\P!0\0805\08051510 4zz doe-Mit 1 ' (804141 00008)