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Earth Engineering Consultants,LLC <br /> EEC Project No. 1122096 <br /> Signal Reservoir Improvements <br /> August 5,2015 <br /> Page 7 <br /> ANALYSIS AND RECOMMENDATIONS <br /> Moisture Density Relationship-Standard Proctor Density <br /> In-situ moisture contents within the overburden cohesive subsoils ranged from as"dry as/low as" <br /> approximately 5% to as high as approximately 34%, (the higher moisture contents were <br /> encountered within the near surface subsoils at the toe of the embankment slope), with a median <br /> of about 15% for the California barrel and split-spoon samples collected during the drilling <br /> operations. In-situ moisture contents within the underlying bedrock formation ranged from as <br /> "dry as/low as" approximately 7% to as high as approximately 33% with a median of about <br /> 19.5% for the California barrel and split-spoon samples collected during the drilling operations. <br /> The in-situ moisture contents in conjunction with the recorded standard penetration test (SPT) or <br /> resistance blow counts as presented on the boring logs included in the Appendix correspond to <br /> consistencies of medium stiff to stiff overburden materials, and moderately hard to hard and/or <br /> poorly cemented within the underlying bedrock formation. EEC also performed standard Proctor <br /> density (ASTM Specification D698) tests on various composite samples of overburden and <br /> underlying bedrock materials collected during our field exploration. The various composite <br /> samples as identified herein are labeled "A" through "Y' and in general consisted of overburden <br /> soils (i.e., the upper 10-feet of overburden soils from various borings including the interior <br /> reservoir borings and the recently completed dam evaluation borings) and of the underlying <br /> bedrock materials (i.e., approximately 10 to 20-feet below existing site grades from various <br /> borings). <br /> For each composite sample soil classification/Atterberg Limits and minus No. 200 Sieve wash <br /> gradations were performed on each sample and on selected samples standard Proctor density <br /> tests (ASTM Specification D698) test were performed. The results of the soil classification and <br /> standard Proctor density testing on the composite samples collected during our subsurface <br /> exploration are presented below. <br />