3800 RIVERFRONT BLVD Geotech Report 2023-05-04

'DRILLING COMPANY: Holocene Drilling DATE STARTED: 11/6/2018 1 DRILLING METHOD: Dietrich D-50 Turbo,HSA&Mud Rotary DATE COMPLETED: 11/6/2018 SAMPLING METHOD: SPT with Autohammer LOGGED BY: A.Ong LOCATION: See Figure 2 SURFACE ELEVATION: 37.8 t feet gStandard Penetration Test `� m z w o a M 1-t I- Q (140 lb.weight,30"drop) p I- Z co.s p A Blows per foot O W W W� Z P I 0 J J 3 >^ 15 W y >-CI-1 U) < < W 2 F- ce Jai 0= CO D DESCRIPTION N U) a 0 00 10 20 30 40 50 W" 60— Very dense,dark gray,clean,medium to coarse SAND S-13 25-28-32 �� - grading to fine to medium SAND,wet. A - - —-25 .•.•.• SW - •• . XVe• ry dense,dark gray,clean,fine to coarse SAND,wet. S-14 25-32-39 • • • ••••• - s▪':'t• —-30 SW SM 70 Very dense,dark gray,slightly silty,slightly fine gravelly,fine S-15 25-45-32 GS �� - •••;•;. to coarse SAND with 2-inch lens of fine-medium SAND,wet. - • • . • " --- -35 • - 75— »� - \Poor recovery.Very dense,dark gray,dean fine to medium ®S-16 50/6" SAND,wet. [ - - Borehole terminated at 75.33'below ground surface(bgs). - Groundwater encountered at 20'bgs during drilling. — -40 Borehole abandoned with 3/8"bentonite chips. - 80— _ I _ II -45 85— - - — -50 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. J BORING: DI TGEOTECHNICAL ENGINEERING REPORT BH-42 RIVERFRONT BOULEVARD HWAGEOSCIENCES INC. EVERETT, WASHINGTON PAGE: 3 of 3 PROJECT NO.: 2015-061 FIGURE: A-8 BORING-DSM 2015-061.GPJ 12/10/18