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Earth Engineering Consultants.LLC <br /> EEC Project No. 1122096 <br /> Signal Resemoir Improvements <br /> August 5.2015 <br /> Page 5 <br /> weathered with depth. The bedrock formation also exhibited permeability characteristics <br /> conducive for earthen liner material. <br /> The stratification boundaries indicated on the boring logs represent the approximate locations of <br /> changes in soil and rock types. In-situ, the transition of materials may be gradual and indistinct. <br /> GROUNDWATER CONDITIONS <br /> Observations were made while drilling and shortly thereafter, to detect the presence and depth to <br /> hydrostatic groundwater within the Signal Reservoir soil borings. At the time of our field <br /> exploration and/or shortly thereafter, groundwater and/or the presence of a water via either a <br /> perched/trapped condition on the top of the relatively impervious bedrock and/or <br /> fractures/fissures within the bedrock formation, was measured in borings B-2, B-5, B-6, B-13, <br /> and B-16 at approximate depths of 22 to 38-feet below existing site grades. Groundwater and/or <br /> the presence of a measureable water surface were not encountered in the remaining soil borings <br /> to maximum depths of exploration, approximately 25 to 40-feet below site grades. The borings <br /> were backfilled upon completion of the drilling operation; therefore subsequent groundwater <br /> measurements were not obtained. <br /> Fluctuations in groundwater levels can occur over time depending on variations in hydrologic <br /> conditions, and other conditions not apparent at the time of this report. Monitoring in cased <br /> borings protected from the infiltration of surface water would be required to more accurately <br /> evaluate the depth and fluctuation in groundwater levels. <br /> Zones of perched and/or trapped groundwater may occur at times in more permeable zones in the <br /> subsurface soil, in soils overlying bedrock, on top of the bedrock surface or within permeable <br /> fractures in the bedrock materials. The location and amount of perched water is dependent upon <br /> several factors, including hydrologic conditions, type of site development, irrigation demands on <br /> or adjacent to the site, and seasonal and weather conditions. The observations provided in this <br /> report represent groundwater conditions at the time of the field exploration, and may not be <br /> indicative of other times, or at other locations. <br />