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n <br />r <br />r, <br />Ii <br />i� <br />G <br />i <br />0 <br />a <br />MW k'q KLEINFELDER <br />� 1 C <br />Kleinfelder observed debris removal from Sites B and C located on the southeastern portion of <br />the former Spreckels Plant, also known as the former Grover Area (see Plate 3). Approximately <br />5,000 yards of soil and debris was excavated from Site B and 10,000 yards from Site C. <br />Groundwater was encountered at both sites at depths of 6 to 9 feet below ground surface (bgs). <br />During excavation activities two groundwater and one soil sample were collected from Site B <br />and six soil samples were collected from Site C. A total of two groundwater and three soil <br />samples were analyzed for selected analytes. <br />After excavation of the debris areas. an attempt was made to destroy six monitoring well in the <br />vicinity of the disposal areas. Three of the monitoring wells were destroyed and three were not <br />able to be located due to construction activities. <br />4.1 EXCAVATION OF I)EBRIS <br />On Tune 11 to .lune 18, 1999 Disposal Sites B and C were excavated by DSS Company Inc <br />(DSS). Mr. Joe Zilles.. a Kleinfelder geologist observed the excavation activities. Mr. Robert <br />McCollum of the Solid Waste Section of the PHS/EHD was the onsite inspector. For locations <br />of the disposal areas refer to Plate 3. <br />4.1.1 Excavation of Disposal Site B <br />Site B was an elongated oval-shaped excavation approximately 270 feet long and 50 feet wide by <br />an average of 12 feet deep. The maximum depth of the excavation in relatively small areas was <br />20 feet bgs. Approximately 5.000 cubic yards of soil/debris was removed. Debris included <br />plastic sheeting, wood. wire. concrete and wood. Mr. Rod Getty, supervisor from DSS estimated <br />that debris at this location was approximately 1 percent by volume. Concrete was estimated to <br />be about 70 percent of the debris material. A strip of slaked lime was observed near the <br />southeastern portion of the excavation measuring 150 feet long and 15 feet wide. The slaked <br />lime was encountered at depths ranging from 8 to 10 feet bgs. Mr. Getty estimated that <br />approximately 25 percent by volume was slaked lime or lime material. <br />Soils encountered included silt and clayey silt with slaked lime material. A small area of <br />apparently discolored dark gray material was noted just above the slaked lime with a strong <br />organic odor. Agreenish-gray colored soil was noted below the slaked lime at depths ranging <br />from 10 to 20 bgs. These colors surrounding the lime was common in their occurrence in other <br />20-3978-03.W36/2019766 Page 9 of 20 <br />© 1999, Kleintelder, Inc. September 9, 1999 <br />