3800 RIVERFRONT BLVD Geotech Report 2023-05-04

'DRILLING COMPANY: Holocene Drilling DATE STARTED: 11/6/2018 DRILLING METHOD: Dietrich D-50 Turbo,HSA&Mud Rotary DATE COMPLETED: 11/6/2018 SAMPLING METHOD: SPT with Autohammer LOGGED BY: A.Ong IILOCATION: See Figure 2 SURFACE ELEVATION: 35.0 ±feet cn I N w z o WLL-I Standard Penetration Test U a t Q Lu (140 lb.weight,30"drop) Z ...1O w w w e , 0 A Blows per foot O_ 3 >^I - w cu >- (Un Q ¢ w° ~ cc 0 cn D DESCRIPTION N co a z 0 c7 0 10 20 30 40 50 w'" Dense,gray,dean fine to coarse SAND with trace fine El S-13 15-19-22 - rounded gravel,wet. - - • (ADVANCE OUTWASH) - 65— .' Dense,gray,dean,medium to coarse SAND,wet. With 1.5 S-14 24-22-25 A —-30 inch lens of very fine SAND and SILT. - 70 • Dense,gray,dean medium to coarse SAND,wet. With 1.5 S-15 20-20-22 A —-35 - inch lens of very fine SAND and SILT,and two 1 inch lenses - of very fine subrounded gravelly medium to coarse gray I - SAND.. - 75 Very dense,dark gray,clean,slightly fine gravelly,medium to S-16 25-26-29 »A -40 - coarse SAND,wet. - 80— '• Very dense,dark gray,interlayered fine to medium silty SAND Ix S-17 25-31-36 >>A—-45 • - :•. and fine sandy SILT,wet.Thinly bedded with small wood - \fragments. r _ Borehole terminated at 81.2'below ground surface(bgs). _ Groundwater encountered at 25'bgs during drilling. - Borehole abandoned with 3/8"bentonite chips. - 85— — -50 90- 0 20 40 60 80 100 I 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. I BORING: I = GEOTECHNICAL ENGINEERING REPORT B BORING: RIVERFRONT BOULEVARD -41 HWAGEOSCIENCES INC, EVERETT, WASHINGTON PAGE: 3 of 3 I PROJECT NO.: 2015-061 FIGURE: A-7 BORING-DSM 2015-061.GPJ 12/10/18