3535 RIVERFRONT BLVD Geotech Report 2023-02-22

"DRILLING COMPANY: Holocene Drilling LOCATION: Three-Acre Park 1 DRILLING METHOD: HSA,CME 850 tracked rig DATE STARTED: 6/29/2010 SAMPLING METHOD: SPT w/Autohammer DATE COMPLETED: 6/29/2010 ISURFACE ELEVATION: 14.00*feet LOGGED BY: P.Pearson cn ix w I m m Z w Standard Penetration Test U } ? <s 1- Q (140 Ib.weight,30"drop) - O w w w Z A Blows per foot m m I a�, 2 0 2 2 z 8 = O a6 w0 >- Cl) a a w$ 1- m w°, Cl CO >0- DESCRIPTION Cl) a-- 0 O 0 10 20 30 40 50 —0 0" ML Surface condition:Grass : • _ ML Very stiff,dark gray brown,sandy,organic SILT,moist. S-1 6-13-18 OC A _ Some wood waste and gravel. (FILL) ....,...., ,....,...., - Organic content of sample at 2.5 feet=20.5%. Roots/hard drilling at 5 feet. Driller notes gravelly drilling between 5-7 feet bgs.Some _ A - _ °Qa GP 1`gravel caving. / 6-12-3 Low recovery in sampler at 7.5 feet. Small amount of - - o D broken rock fragments noted. 10— °Qa —10 _ )o b - 00 - a Qa - _ °�" GP Medium dense,dark olive brown,slighlty silty GRAVEL,wet. S-2 CN °CY GM OC • - -10 b Organic content of shelby sample at 12.5 feet=2.4%. ...; • _ °C (I Q —15 15— a� _ )o 0 - °C _ SM Loose,dark gray to dark olive gray,slightly gravelly,very S-3 0-2-4 GS :`•••, silty fine SAND,wet,with some organics and wood in sampler tip. - - •::`:,;•? (ALLUVIUM) 20— :•: . Drilling tough due to wood from 19-22 feet bgs. ••• ' '••-•—20 :1: _ `:: SP Medium dense,dark gray,slightly silty,poorly graded fine to S-4 9-8-8 GS A - .%.., SM medium SAND,wet,with trace gravel and some wood- • debris. - `, ' Driller notes wood from 24-26 feet bgs. 25— —25 _ ::::• ;; SP Medium dense,gray and dark gray,slightly gravelly,slightly S-5 5-12-13 GS :". SM silty,poorly graded fine SAND,wet. ' Low recovery in sample S-5 at 27.5 feet bgs. 30— For a proper understanding of the nature of subsurface conditions,this 0 20 40 60 80 100—30 exploration log should be read in conjunction with the text of the Water Content(%)aeotechnical report. Plastic Limit �--�I Liquid Limit NOTE: his 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. 1 M � PUBLIC AMENITIES BORING:B_1 04 RIVERFRONT DEVELOPMENT I H YAGECISQENCES INC EVERETT, WASHINGTON PAGE: 1 of 3 PROJECT NO.: 2015-061 FIGURE: A-5 BORING 2007-087.GPJ 6/26/12