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June 26 ,1990 <br /> Tuesday <br /> Day # 17 <br /> Backfill CKC continues to place sand and water ,het deep <br /> section of east excavation <br /> Began seven feet below finish grade, to place the <br /> L overburden stockpiled soils into the west <br /> excavation AIM ran a compaction curve on this <br /> material which showed a dry density of 110 LBS/CF <br />' and optimum moisture content of 15% Compaction <br /> tests by AIM averaged 85% using this material <br /> Biocell Jim and Jeff were on site to work on cell <br />' Irrigation irrigation system The clock on the automatic valve <br /> would not operate AM&M electrician helped Jim to <br /> diagnose the problem of no transformer on the clock <br />' power supply <br /> Instructed Jim and Jeff that a back flow prevention <br /> device is required to be installed in line on the <br /> water supply The water supply is a domestic water <br /> source for building 40 personnel <br /> f <br /> 1 <br /> 1 <br />