ARCHIVED REPORTS LIMITED SOIL ASSESSMENT AND TEST PIT EXPLORATION

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4 KLEINFELDER ' P5 were advanced adjacent to the dry wlls located at the base of the stands ell located in the interior Race Track Area. nd pushprobe P3 was advanced near the dry The five push probes in the Dry Wells Areas were advanced to approximate total depths that ranged between 26 and 33 feet below ground surface (bgs). The AST pushprobe was advanced to approximately 16 feet bgs . Groundwater was not noted in any of the pushprobe borings. According to Kleinfelder's ESA findings, the local flood control district shows depth to groundwater in the Spring of 1999 near the site at approximately 45 feet bgs. According to depth to water data from Gillies Trucking located approximately 1700 feet to the east depth to groundwater is approximately 65 feet as of the fourth quarter of 2004. ' The push probe borings were pneumatically advanced using a 4 foot steel core barrel. Soil samples were continuously collected by inserting a new four foot acetate liner into the probe prior to each drive. Soil samples obtained for potential chemical analyses were collected at desired intervals by removing the acetate liner o and cutting out the desired 6-inch interval. The soil samples were sealed with Teflon film and plastic end caps. Two soil samples were collected from each pushprobe boring at depths ranging from 6 to 32 feet bgs (See sample collection depths in boring logs in Appendix A). Samples submitted for analysis were also collected at depths ranging from 6 to 32 feet ' bgs. Both soil samples in the AST Area at depths of 6 and 15 feet bgs were analyzed and at least one and up to two soil samples from the dry well borings were analyzed. Most of the soil samples submitted for analyses in the dry well areas were collected near the total depth of the respective borings to evaluate potential contaminants leaching from the base of the dry wells into the adjacent vadose zone. During the advancement of the push probes, Kleinfelder collected soil samples for logging 1 purposes, field screening and potential chemical analysis. No unusual odors or soil discoloration was noted in the continuous soil cores generated during advancement of the pushprobes. Soils were noted as interlayered silty sand (fine grained), clayey silt, and silty clays. Silts ' and fine sands were predominant. For additional details see boring logs in Appendix A. 4.2. INTERIOR RACE TRACK AREA A total of 14 soil samples were collected from six hand-auger borings which were advanced to a maximum depth of approximately 5 feet bgs on July 7, 2005. The six locations were located within the interior track area on grass and dirt areas. Two locations (HA2 and HA3) were located near the two turns in the track and one near a drive entrance (HA1) to the central portion of the track (as divided by a K-rail). The three remaining locations (HA4, HA5 and HA6) were located near the central portion of the track. Plate 2 illustrates the approximate location of the six hand auger borings. The soil samples were collected at depths ranging from 1 to 5 feet bgs. Eight of the 14 soil samples collected at depths ranging from 3 to 5 feet bgs were submitted for Page 10 of 22 58671.E02/ST05R1127/DH:ly September 15, 2005 ©2005 Kleinfelder, Inc.