7501 HARDESON RD BASE FILE 2018-01-02 MF Import

CASCADE GEOTECHNICAL INC. June 2, 1?94 Job No. 9405-02G DCPT/MSS #4 encountered light brown, mottled sand (SP) with variable amounts of silt and gravel underlying the silty sand. The sand was observed to be dense to very dense and moist. DC7r/MSS #5 showed a gray, vezy stiff to hard sandy silt (ML) from three and one-half (3 1/2) feet to the total boring depth. DCPT/MSS A6, located at the southwestern end of proposed Building B, also showed uncontrolled fill overlying dense soils. This uncontrolled fill consisted of brown, moist, silty fine-grained sand with minor organics. Although auger refusal prevented advancement of the auger deeper than four (4) feet, our DCPT appeared to encounter native bearing soil at a depth of approximately nine (9) feet. All of the trackhoe test pits encountered ground water at depths ranging between seven and one- half (7 IA) feet in Test Pit M3 and eleven (11) feet in Test Pit #2. In Test Pit N1, the ground water appeared to be perched on the underlying dense glacial soils as they were observed to be moist to wet. No ground water was observed within any of the MSS borings logged at the site. 4.3 Published Geology Our literature review regarding the geologic and geomorphologic characteristics of the site included a review of the following sources of information: • USGS 7.5 Minute Geologic Map of the Everett Quadrangle= • USGS 7.5 Minute Everett Quadrangle Topographic Map (1953) • aerial photographs of the site (1988) Our review of the topographic map and aerial photographs did not identify any large-scale zones rMinard, J.P., 1985, "Geologic Map of the Evcrctt 7.5 Minute Quadrangle, Snohomish County, Washington": USGS Miscellaneous Field Studies Map MF-1748, scale 1:24,000.