6307 36TH AVE W Geotech Report 2025-07-29

I 1 I APPENDIX A FIELD EXPLORATION AND LABORATORY TESTING Intermec Site Everett,Washington On July 24 and 25, 2008,we investigated subsurface conditions at the site by excavating 14 test pits to maximum depths of approximately 15 feet below existing surface grade using a track-mounted excavator. On July 29 we observed the drilling of 2 test borings to a maximum depth of 31.5 feet below existing site grades. The borings were drilled using a track-mounted drill rig and advanced with hollow-stem auger. The test pit and boring ' locations are shown on Figure 2. The test pit and boring locations were approximately determined by measurements from existing site features. The Test Pit and Boring Logs are presented on Figures A-2 through A- 17. A geotechnical engineer from our office conducted the field explorations, classified the soils encountered, maintained a log of each test pit and boring, obtained representative soil samples, and observed pertinent site features. Representative soil samples obtained from the test pits were placed in closed containers and taken to our laboratory for further examination and testing. ' Test boring soil samples were obtained in general accordance with American Society for Testing and Materials (ASTM) Test Designation D-1586. Using this procedure, a two-inch (outside diameter) split barrel sampler was driven into the ground 18 inches using a 140-pound hammer free falling a height of 30 inches. The number of ' blows required to drive the sampler 12 inches after an initial 6-inch set is referred to as the Standard Penetration Resistance value or N value. This is an index related to the consistency of cohesive soils and relative density of cohesionless materials. N values obtained for each sampling interval are recorded on the Boring Logs. All soil samples were visually classified in accordance with the Unified Soil Classification System (USCS) described on Figure A-1. The moisture content of each sample was measured and is reported on their perspective Test Pit and Test Boring Logs. Grain size analyses were performed on six of the samples. The results are shown on Figures A-18 and A-19. 1 I I Project No.T-6241