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subsoils which extended to the bedrock formation below. Siltstone/claystone bedrock with <br /> intermitted sandstone lenses was encountered in each of the Signal Reservoir borings at depths <br /> as shallow as 3-feet below existing site grades"and "to as deep as approximately 33 feet". <br /> "The bedrock formation, in general classified as lean clay with sand, sandy lean clay and/or <br /> sandy fat clay". <br /> Samples gathered during the subsurface examination were analyzed in accordance with <br /> accepted industry standards. The description of the sampling protocol as stated in the EEC <br /> summary report states: <br /> "Laboratory moisture content tests were completed on each of the recovered California barrel <br /> and split-spoon samples. In addition, the unconfined strength of appropriate samples was <br /> estimated using a calibrated hand penetrometer. Atterberg Limits and washed sieve analysis <br /> tests were completed to evaluate the quantity and plasticity of fines in selected subsurface <br /> samples. Additional laboratory testing procedures included moisture-density <br /> relationship/standard Proctor density(ASTM Specification D698), direct shear(ASTM <br /> Specification D3O8O) characteristics on the native subsoils and the underlying bedrock, and <br /> falling head permeability characteristics (ASTM Specification D5856) on the recovered <br /> bulk/composite samples. Results of the outlined tests are indicated on the attached boring logs <br /> and summary sheets". <br /> "As part of the testing program, all samples were examined in the laboratory by an engineer <br /> and classified in accordance with the attached General Notes and the Unified Soil Classification <br /> System, based on the soil's texture and plasticity. The estimated group symbol for the Unified <br /> Soil Classification System is indicated on the boring logs and a brief description of that <br /> classification system is included with this report. Classification of the bedrock was based on <br /> visual and tactual observation of disturbed samples and auger cuttings". <br /> The subsurface evaluation conducted by EEC identified the presence of water in only five (5) of <br /> the seventeen (17) sample holes. This water was encountered at depths between twenty two <br /> (22)to thirty eight (38) feet below existing grade and was characterized by EED as "the presence <br /> of water via either a perched/trapped condition on the top of the relatively impervious bedrock <br /> and/or fractures/fissures within the bedrock formation". <br /> The presence of water in the soils in the permit area was not unexpected as this facility has <br /> been used for water storage for more than one hundred years. <br /> Results from this geotechnical evaluation have been used in the design of the planned <br /> excavation. <br /> • <br /> Signal#1 Reservoir Expansion-111 Special Operations Permit Application <br /> March 22,2018 9 <br />