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� r l <br /> I <br /> groundwater was discharged into the sanitary sewer at 420 North Madison Street by Evans <br /> Brothers Construction. Laboratory analytical reports for the groundwater samples are included <br /> in Appendix B. <br /> 4.5 Soil and Groundwater Sampling and Analyses <br /> Following the removal at the groundwater cited in Section 4.4, on 20 April 2005, one soil <br /> confirmation sample,CPT-EXC-25, was collected from the bottom of the excavation at 25 bgs <br /> i <br /> (Figure 2). One groundwater sample, CPT-EXC-GW,was also collected from water in the <br /> bottom of the excavation. Both samples were analyzed for TPHg and BTEX compounds by EPA <br /> Methods 8015M and 8020 respectively (Tables 1 and 2). In soil confirmation sample CPT-EXC- <br /> 25, TPHg, BTEX,and MTBE were not detected above laboratory reporting limits. TPHd was <br /> detected at 1.2 mg/kg. In groundwater sample CPT-EXC-GW, TPHg, and TPHd were detected <br /> at 3,500 and 1,100 micrograms per liter(pg/L)respectively. MTBE and benzene were not <br /> detected above laboratory reporting limits. Toluene, ethylbenzene and xylenes were detected <br /> at 9.0 pg/L, 74 gg/L and 290 pg/L respectively. <br /> Tables 1 and 2 show the analytical results for the soil and groundwater confirmation samples, <br /> respectively. Appendix B presents the analytical laboratory reports. <br /> am <br /> 4.6 Soil Stockpile Sampling and Disposal <br /> p g ,posal <br /> Soil from the excavation was placed into two stockpiles according to excavation depth. Soil <br /> from the top fifteen feet of the excavation.(shallow stockpile)was separated from soil from the <br /> bottom ten feet of the excavation(deep stockpile). Eight discrete soil.samples were collected <br /> from the deep stockpile on 20 April 2005.` Each discrete sample represented approximately 18 to <br /> 20 cubic yards of soil (Table 4). All samples from the soil stockpile were analyzed for TPHg, <br /> BTEX, and MTBE. Table 4 presents the analytical results for the stockpile samples for TPHg, <br /> BTEX, and MTBE. Samples CPTSP-C and CPTSP-F were composited and analyzed for CAM <br /> 17 metals for landfill disposal characterization purposes. MTBE and benzene were not detected <br /> above laboratory reporting limits in any of the soil stockpile samples. Toluene, ethylbenzene, <br /> 25971024.DGD 7 7 June 2005 <br />