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• mudstone and shale were encountered in Boring # 2. Below this strata, between 10 to 15 Feet, <br />several strata containing sand and gravel sized fragments of sandstone, siltstone and mudstone were <br />encountered. Some strata below 10 feet were observed to be of relatively low density and high <br />permeability. It is expected these lower strata will exhibit compressible chazacteristics and some <br />strata may exhibit slight metastable chazacteristics. <br />The soils encountered in the upper 8 feet of the soil profile are quite similar <br />to the soils identified as borrow soils for the embankment. For purposes of this report, these soils <br />have been grouped together as Soil Type I. These soils are anticipated to be used as embankment <br />borrow material and as foundation soils for the embankment. <br />This Soil Type is classified as a very silty, clayey sand (SC) containing variable <br />amoums of gravel of medium to coarse grain size under the Unified Classification System. This soil <br />type is of low plasticity and of low to medium density. This soil will have virtually no tendency to <br />expand upon the addition of moisture. Settlement will be minimal under the recommended foundation <br />loads. This soil will undergo elastic settlement upon application of static foundation pressures. Such <br />• settlement is characteristically rapid and should be virtually complete by the end of construction. If <br />the recommended allowable bearing values are not exceeded, and if all other recommendations are <br />followed, differential movement wilt be within tolerable limits. At shallow foundation depths, as <br />those anticipated for the embankment and the key way, this soil was found to have an average <br />allowable bearing capacity of 3500 psf. <br />Selected samples of soil, which maybe utilized for backfill purposes, have been <br />subjected to Laboratory Direct Shear Testing (Similar to ASTM D-3080). The samples were tested <br />in a remolded, consolidated, drained (CD) condition. Following aze the results: <br />Soil Angle of Apparent Test Unit <br />Type Internal Cohesion Weight <br />Friction psf pcf <br />I 23.2° 202 107 <br />These soils were also tested for water permeability, using the fatting head <br />method. These soils were compacted to approximately 107.1 pounds per cubic foot which is <br />4 <br />