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Treadwell&Rdlo groundwater was discharged into the sanitary sewer at 420 North Madison Street by Evans Brothers Construction Laboratory analytical reports for the groundwater samples are included in Appendix B 1 4.5 Soil and Groundwater Sampling and Analyses ' Following the removal at the groundwater cited in Section 4 4, on 20 Apnl 2005, one soil confirmation sample, CPT-EXC-25, was collected from the bottom of the excavation at 25 bgs (Figure 2) One groundwater sample, CPT-EXC-GW, was also collected from water in the bottom of the excavation Both samples were analyzed for TPHg and BTEX compounds by EPA ' Methods 8015M and 8020 respectively (Tables 1 and 2) In soil confirmation sample CPT-EXC- 25, TPHg, BTEX, and MTBE were not detected above laboratory reporting limits TPHd was ' detected at 12 mg/kg In groundwater sample CPT-EXC-GW, TPHg, and TPHd were detected at 3,500 and 1,100 micrograms per liter (gg/L) respectively MTBE and benzene were not detected above laboratory reporting limits Toluene, ethylbenzene and xylenes were detected at 9 0 µg/L, 74 pg/L and 290 gg/L respectively Tables 1 and 2 show the analytical results for the soil and groundwater confirmation samples, respectively Appendix B presents the analytical laboratory reports 4.6 Soil Stockpile Sampling and Disposal ' Soil from the excavation was placed into two stockpiles according to excavation depth Soil from the top fifteen feet of the excavation(shallow stockpile)was separated from soil from the ' bottom ten feet of the excavation (deep stockpile) Eight discrete soil samples were collected from the deep stockpile on 20 April 2005 Each discrete sample represented approximately 18 to ' 20 cubic yards of soil (Table 4) All samples from the soil stockpile were analyzed for TPHg, BTEX, and MTBE Table 4 presents the analytical results for the stockpile samples for TPHg, ' BTEX, and MTBE Samples CPTSP-C and CPTSP-F were composited and analyzed for CAM 17 metals for landfill disposal characterization purposes MTBE and benzene were not detected above laboratory reporting limits in any of the soil stockpile samples Toluene, ethylbenzene, 25971024 DGD 7 7 June 2005