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approximately the same as the depth to water in areas immediately <br /> exterior to the building Ground water levels subsequently rose in each <br />' borehole to stabilize at an equivalent of 9 feet bgs <br /> As illustrated in the drilling logs in Appendix B, geologic conditions <br />' encountered during drilling at the soil boring location within the <br /> excavation footprint included, from land surface, the following <br /> • Soil fill to 3 feet bgs, <br /> • Gravel fill from 3 feet to approximately 8 feet bgs, and <br /> ' • Sandy, silty clay, and silty sand from 8 feet to the total depth of 15 <br /> feet bgs <br /> Ground water was encountered at approximately 9 feet bgs This <br /> ground water level was equivalent to the stabilized water levels in the <br /> boreholes drilled within the building Data collected during this and <br /> previous investigations at the site suggest that the confining bed was <br /> breached during excavation activities at Site #1 Accordingly, ground <br /> water levels within the excavation footprint are presumed to reflect the <br /> piezometric surface in the area <br /> Former Tank Site #2 Geologic and hydrogeologic conditions <br /> encountered during drilling at the soil boring location (S2-B3) within <br /> the warehouse building were comparable to those described during <br /> previous investigations at the property As illustrated in the drilling <br /> logs in Appendix B, approximately 3 feet of fill material underlies the <br /> building foundation Beneath this fill material, a series of relatively <br /> fine-grained sediments were encountered (e g , silty clay, silt, silty <br /> sand) Ground water was encountered at approximately 16 feet below <br /> the top of the building foundation This depth to water is equivalent to <br /> approximately 13 feet bgs for the area immediately exterior to the <br /> building Ground water levels subsequently rose in each borehole to <br /> stabilize at an equivalent of 6 feet bgs <br /> ' As illustrated in the drilling logs in Appendix B, geologic conditions <br /> encountered while drilling the two soil borings (S2-B1 and S2-B4) <br /> ' located on or near the sidewall of the former excavation area included, <br /> from land surface, the following <br /> ' * Soil fill to approximately 3 feet bgs, <br /> • Silty clay/clay from 3 feet to approximately 11 feet bgs, and <br /> ' • Silty sand from 11 feet to the total depth of 15 feet bgs <br /> ' - 4-4 <br />