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Page 11 - #120-11872 <br />FIELD EXPLORATION PROCEDURES <br />Eleven soil test borings (numbered 6 through 16) were made on M <br />18, 1984. ay 17 and <br />The borings were put down at the locations shown on the attach <br />sketch. The surface elevations were referenced to the top of theattached <br />hydrant <br />where shown, taken as 938.141, an elevation obtained from our <br />Y surveyors. <br />Soil sampling was performed in accordance with ASTM: D 1586-. <br />67. Using this <br />procedure, a 2" O.D. split barrel sampler is driven into the soil <br />lb weight falling30" Y a 140 <br />. After an initial set of 6", the number of blows re- <br />quired to drive the sampler an additional 12" is known as the <br />resistance or N value. The N value is an index of thepenetration <br />relative density of <br />cohesionless soils and the consistency of cohesive soils. <br />As the samples were obtained in the field, they were visual <br />classified by the crew chief in accordancevisually and manually <br />with ASTM: D 2488-69. Represen- <br />tative portions of the samples were then returned to the lab <br />further examination and for verification of theoratory for <br />field classification. <br />Logs of the borings indicating the depth and identification <br />strata, the N value, water level information and pertinent <br />of the various <br />nent information <br />regarding the method of maintaining and advancing the drill hole <br />attached. Chart s are <br />illustrating the soil classification procedure, the <br />descriptive terminology and symbols used on the boring logs gs are also <br />attached. <br />SOIL exPLOf= ation <br />corrdmany <br />