1321 COLBY AVE 1988 PARKING GARAGE AND MEDICAL OFFICE BUILDING Geotech Report 2018-01-02 MF Import

APPENDIX A W-5557 SUBSURFACE EXPLORATION The field exploration program conducted for this study consisted of advancing a series of five borings. The approximate exploration locations are illustrated on the Site and Exploration Plan, Figure 1. The locations were obtained in the field by tape from existing site features. Elevations were interpolated from contours on a topographic plan. Locations and elevations should be considered accurate only to the degree implied by the method used. Hollow Stem Auger Borings The borings were drilled on 14 March 1988 by a local exploration drilling company under subcontract to our firm. The borings consisted of advancing a 4-inch inside diameter, hollow-stem auger with a truck-mounted drill rig. During the drilling process, samples were obtained at generally 2.5 or 5.0 foot depth intervals. The borings were continuously observed and logged by an engineering geologist from our firm. Disturbed samples were obtained by using the Standard Penetration Test Procedure as described in ASTM:D 1586. This test and sampling method consists of driving a standard 2-inch outside diameter split barrel sampler a distance of 18 inches into the soil with a 140 pound hammer free falling a distance of 30 inches. The number I of blows for each 6 inch interval is recorded. The number cf blows required to drive the sampler the final 12 inches is considered the Standard Penetration Resistance ("N") or blow count. The blow count is presented graphically on the boring logs in this appendix. If a total of 50 blows is recorded within one 6 inch continued 1