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rf7?r ’I <br />^ <br />APPENDIX <br />DRILLING AND SAMPLING PROCEDURES _ <br />The field work wee performed on November 16 and 29, 1988 <br />uelng a truck-mounted CME-46B drill unit. The teat holee were <br />advanced with 3-1/4“1.d. x 7-o.d. continuoue flight, hollow etem <br />augers which act as a temporary casing to prevent collapse of the <br />sides of the hole. <br />Standard penetration tests were performed In advance of the <br />auger tip at 2 to S foot Intervals of depth. In accordance with <br />procedures designated 1n ASTH D-1586. In this procedure, a 2**o.d. <br />split barrel sampler Is driven Into the soil by repeated blows of <br />a 140 lb. weight falling 30**. Aft - an Initial set of 8", the <br />number of blows required to drive the sampler an additional 12" <br />Is recorded as the penetration resistance of N value (blows per <br />foot). This value Is an Index of the relative density of <br />cohenslonless soils (sands) and a consistency of cohesive soils <br />(clay). In addition, thin-walled tube samples of cloy soils were <br />obtained according to ASTM D-1587 at the depths Indicated by <br />appropriate symbol on the boring logs. <br />_ 6iN£—y »«>•H MN Si43J <br />m