2000 TOWER ST ARTS AND SCIENCES BLDG 2018-01-02 MF Import

APPENDIX A I FIELD EXPLORATIONS Subsurface conditions at the site were explored on March 12, 2004 by drilling five borings (B-1 through B-5) at the approximate locations shown on the Site and Exploration Plan, Figure 2. The borings were drilled to depths ranging from about 21 to 36.5 feet within the proposed Art and Science building footprint. The borings were completed using a truck -mounted Mobile B-59 drill rig, owned and operated I by Holt Drilling, of Puyallup, Washington. Boring locations were determined in the field by pacing distances from existing site features. The borings were .ontinuously monitored by a geotechnical engineer from our firm who examined and classified the soils encowrtered, obtained representative soil samples, and observed groundwater conditions. Our representative maintained a detailed log of each boring. Disturbed samples of the representative soil types were obtained from the borings using Standard Penetration Test (SPT) sampling procedures. Standard Penetration Test (SPT) sampling was performed using a 2-inch outside -diameter split -spoon sampler driven with a standard 140-pound hammer in accordance with American Society for Testing and Materials (ASTM) D 1586. The soils encountered in the borings were typically sampled at 2'/2- to 5-foot vertical intervals. Samples were obtained by driving the sampler 18 inches into the soil with a hammer free -falling 30 inches. The number of blows required for each 6 inches of penetration was recorded. The Standard Penetration Resistance ("N-value") of the soil is calculated as the number of blows required for the final i 12 inches of penetration (blows/foot). This value is shown on the exploration logs. This n sistance, or N-value, provides a measure of the relative density of granular soils and the relative cot sistency of cohesive soils. If the high penetration resistance encountered in the very dense soils precluded driving the total IS -inch sample interval, the penetration resistance for the partial penetration is entered on logs as follows; if the penetration is greater than 6 inches and less than 18 inches, then the number of blows is recorded over the number of inches driven; 30 blows for 6 inches and 50 for 3 inches, for instance, would be recorded as 80/9". Soils encountered in the borings were classified in the field in general accordance with AST D 2488, the Standard Practice for Classification of Soils, Visual -Manual Procedure, which is summarized in Figure A-1. A key to the boring log symbols is presented in Figure A-2. Logs of the borings any provided in Figures A-3 through A-7. G e o E n g i n c e r s A-1 Pile No. 5836-002-00.'040204 J�