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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 additional <br />12 inches is recorded (known as the penetration resistance (i.e. “N-value”) of the soil at the point of <br />sampling. The N-value is an index of the relative density of cohesionless soils and an approximation of <br />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 result, <br />samples recovered from the boring are disturbed, and our determination of the depth, extend of various <br />stratum and layers, and relative density or consistency of the soils is approximate. <br />Soil Classification: <br />Soil samples were visually and manually classified in general conformance with ASTM D-2488 as they <br />were removed from the sampler(s). Representative fractions of soil samples were then sealed within <br />respective containers and returned to the laboratory for further examination and verification of the field <br />classification. In addition, select samples were submitted for laboratory tests. Individual sample <br />information, identification of sampling methods, method of advancement of the samples and other <br />pertinent information concerning the soil samples are presented on boring logs and related report <br />attachments. <br />10 <br /> <br />