6617 ASSOCIATED BLVD AMAZON Geotech Report 2022-10-25

• • KLEINFELDER • • • Our scope of services does not include either specifically or by implication any environmental or • biological (e.g., mold, fungi, bacteria) assessment of the site or identification or prevention of • pollutants, hazardous materials or conditions. If the owner is concerned about the potential for • such contamination or pollution, additional studies should be undertaken. • • 1.2.1 Task 1 — Background Data Review • • We reviewed readily available published and unpublished geologic literature in our files and the • files of public agencies, including selected publications prepared by the U.S. Geological Survey • (USGS). We also reviewed readily available seismic and faulting information, including data for • designated earthquake fault zones as well as our in-house database of faulting in the general • site vicinity. • • 1.2.2 Task 2 — Field Exploration • • Prior to commencement of the fieldwork, private utility locate services were utilized at the boring • locations to identify potential conflicts with subsurface structures/utilities. Each of our proposed • field exploration locations were also cleared for buried utilities through Washington One-Call • locating services. • • Subsurface conditions at the site were explored by advancing seven (7) geotechnical borings to • depths of approximately 6%to 26%feet below the existing ground surface (bgs) using an EC 55 I• track-mounted drill rig with hollow-stem auger tooling. Representative soil samples were • collected at various depths in accordance with ASTM D1586, Standard Test Method for • Penetration Test and Split-Barrel Sampling of Soils. Bulk grab-samples of the auger cuttings • were also obtained in the upper 5 feet at each boring location. A Kleinfelder geologist from our • Redmond, Washington office supervised the field operations, collected samples, and logged the • explorations. • • Final exploration logs describing the soil conditions encountered, depths of samples collected, • and laboratory test results are presented in Appendix A. Soil descriptions indicated on the logs • result from field observations and data, as well as from laboratory test data. Contact boundaries • between soil types as shown on the logs should only be considered approximate as the • transition between different soil layers may be gradual or discontinuous across the site. • • • • 20203884.001A/SEA20R110164 Page 2 of 28 June 1, 2020 ©2020 Kleinfelder • •