3800 RIVERFRONT BLVD Geotech Report 2023-05-04

'DRILLING COMPANY: Holocene Drilling DATE STARTED: 11/6/2018 DRILLING METHOD: CME 830 Tracked Rig,HSA&Mud Rotary DATE COMPLETED: 11/6/2018 SAMPLING METHOD: SPT with Autohammer LOGGED BY: B.Thurber LOCATION: See Figure 2 SURFACE ELEVATION: 31.0 ±feet Standard Penetration Test v wCCI < a H H a 2 L I- Q (140 lb.weight,30"drop) p Z r.. I- p A Blows per foot O w w w� Z P i 0 J J ce I— y CO U Z o = O w y o CO DESCRIPTION w co a O 0 w ' 0 10 20 30 40 50 60A Dense,gray,dean,fine to medium SAND,wet. S-11 17-20-22 —-30 ii 65— - Dense,gray,dean,fine to medium SAND,wet.With partly S-12 19-21-22 decomposed woody organics at-66'(small lens-1/8"), A — -35 discontinuous. — 70 A Dense,gray,dean,fine to coarse SAND,wet.1-inch layer of S-13 14-16-16 ' ' • - . coarse sand at 70.5'. — -40 SP SM Dense,gray,dean,fine to coarse SAND,wet. 75— • A — Dense,gray to brownish gray,clean to slightly silty,fine to S-14 13-21-18 GS - . medium SAND,wet.Pebbles in 2"lens at-75.7',scattered — -45 \gravel throughout,partly decomposed organics below-76.5'. Borehole terminated at 76.5'below ground surface(bgs). 111 - Groundwater encountered at 22'bgs during drilling. - Borehole abandoned with 3/8"bentonite chips. 80— - - — -50 I 85— - - — -55 r 90— 0 20 40 60 80 100 Water Content(%) Plastic Limit I---• I Liquid Limit NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated Natural Water Content and therefore may not necessarily be indicative of other times and/or locations. Al BORING: 8GEOTECHNICAL ENGINEERING REPORT BH-36 RIVERFRONT BOULEVARD HI AGEOSCIENCESINC. EVERETT, WASHINGTON PAGE: 3 of 3 PROJECT NO.: 2015-061 FIGURE: A-2 BORING-DSM 2015-061.GPJ 12/10/18