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• <br /> Y ; I r5 <br /> • <br /> II <br /> FIELD EXPLORATION PROCEDURES <br /> Soil Sampling--Standard Penetration Boring: <br /> Soil sampling was performed according to the procedures described by ASTM D-1586. Using this <br /> procedure,a 2 inch O.D.split barrel sampler is driven into the soil by a 140 pound weight falling 30 <br /> inches. After an initial set of six inches,the number of blows required to drive the sampler an <br /> additional 12 inches is recorded(known as the penetration resistance(i.e. "N-value")of the soil at <br /> the point of sampling. The N-value is an index of the relative density of cobesionless soils and an <br /> approximation of the consistency of cohesive soils. <br /> Soil Sampling--Power Auger Boring: <br /> The boring(s)was/were advanced with a 6 inch nominal diameter continuous flight auger. As a <br /> result,samples recovered from the boring are disturbed,and our determination of the depth,extend <br /> of various stratum and layers,and relative density or consistency of the soils is approximate. <br /> Soil Classification: <br /> Soil samples were visually and manually classified by the crew chief in general conformance with <br /> ASTM D-2488 as they were removed from the respective sampler(s). Representative fractions of <br /> soil samples were then sealed within respective containers and returned to the laboratory for further <br /> examination and verification of the field classification. In addition,select samples were submitted <br /> to a program of laboratory tests. Individual sample information,identification of sampling <br /> methods,method of advancement of the samples and other pertinent information concerning the soil <br /> samples are presented on boring logs and related report attachments. <br />