2400 33RD ST GEOTECHNICAL INVESTIGATION 2018-01-02 MF Import

SC 130 Milbor-Pita AT11.UPC- Hart Crowser & Associates, Seattle, Washington, Phase I and Phase II Environmental Site Assessments (title unknown), 1989, 1990. Completed for Glacier Park Company [owner of the property at that time] on the East side of Smith Avenue. Exploration logs from these reports that were useful to our analysis are presented in Appendix C. Their approximate locations are presented on Figure 2. 3.0 FIELD AND LABORATORY PROGRAMS 3.1 Site Explorations In May and June of 1999 a total of six geotechnical borings were completed, one on Paine Avenue, two along Smith, and three on the properties east of Smith. The subsurface exploration program consisted of drilling and sampling these exploratory borings (designated MP-1 through MP-6) in the vicinity of the proposed Station. The locations of the borings were chosen based on locations and depths of borings completed for previous investigations and the critical data needed for geo►echnical engineering analysis. The borings were advanced to depth ranging from 31 to 61 feet below the existing ground surface using truck -mounted drill rigs operated by Subterranean Drilling of Tacoma, and Cascade Drilling of Puyallup, Washington, under subcontract to MPA. The approximate locations of the borings are shown on Figure 2. The boring locations were determined in the field by estimating distances from the existing site features. 3.2 Laboratory Testing Soil samples were obtained at selected intervals within the borings, placed in relatively airtight bags, and taken to laboratories in Kirkland, Washington for testing. Laboratory tests were conducted on selected soil samples to characterize engineering and index properties. These tests were performed in general accordance with ASTM guidelines and included determination of natural moisture contents, Atterberg Limits, grain size distributions, percent fines (material passing the U.S. No. 200 sieve), unit weights, and consolidation characteristics. The laboratory data is attached as Appendix C, and summarized on the boring logs in Appendix A. Three consolidation tests were performed on samples from two of the borings. The results are presented in Appendix D and are discussed in the Site Conditions section below. 4.0 SITE CONDITIONS 4.1 Surface Conditions The site is located between Pacific Street on the north, Paine Avenue on the west, the BNSF main line on the east, and 30'h Street on the south. A railroad spur line runs parallel to the main line through the center of the site. Smith Avenue is approximately 48 feet wide and consists of one travel -lane in either direction with wide shoulders to accommodate on -street parking. Geolechnical, Tunnel and I nvironmental Engineers 3080 125m Ave NE Phone (425) 869-3778 nellewe, WA 98005 Paget Pax (425)961-067-7