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e <br /> * Ground water samples were collected withPrecision Sampling, Inc. s <br /> I 1 <br /> 1 Enviro-Core'" sampling system (discussed 'below) instead of the <br />' proposed HP sampling device. <br /> I * Soil boring SB-04 met refusal at seven feet below ground surface (bgs) <br /> l <br /> L (above the water-bearing zone); therefore,fno grab ground water } <br /> E� samples were collected, as proposed. Two additional borehole <br /> attempts, approximately eight feet to the north aA d to the south of <br /> SB-04, also met refusal at a similar depth.., <br /> As specified in the Workplan, soil borings were to be completed to the <br /> ' top of the water-bearing zone; however, due to difficulty in the field in <br /> ,j <br /> establishing the location of the top of the water-Ling zone (or a zone <br /> ,{ <br /> sufficiently saturated to yield a grab ground wat6!r sample), borings <br />�'. were advanced to 25 feet bgs. ? i <br /> 3 f <br /> i <br /> 4.1 Boring Installation <br /> I} <br /> On March 22, 1997, four soil borings (SB-01 through SB-04) were drilled at the Property by 4 <br /> Precision Sampling, Inc., of San Rafael, California. Soil boring locations and the site plan <br /> 4} <br /> E are shown on Figure 2. The soil borings were advanced}using ;a direct-push sampling <br /> system, mounted on a limited access Bobcat° tractor. With the;p exception of SB-04 <br /> E (completed to seven feet bgs, discussed above), the soil borings:'were completed to 25 feet <br /> bgs, and within the water-bearing zone. Appendix B con''tains the field borehole log for each <br /> F <br /> soil boring. If <br /> The soil cores from each borehole were logged by an oil-:site geologist in accordance with the <br /> procedures of the American Society for Testing and Materials D 2488. In addition, <br /> 31 i <br />[' 808-001.rpt104-29-97/u/keydata/repons 8 <br /> I IIS <br /> .h <br /> l <br /> i <br /> iE �! <br />