REVIEWED PLN RESUB 4_ENG2022-0536_GEO REPORT AND CRITCAL AREA_8.16.2024_10.51.58_AM_444550602-063 Fig 1 Vicinity.ppt 5/23/2024(11:41 AM) SHE
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172NE ST SW
Project Location --- —
3
- w _ 180TH sr sw _
S
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I'
City of Edmonds
O
rn
Map not to Scale
Base Map from
Snohomish County SCOPI
u.pT C
196TH S SW
4 ; 2Q0
I._ 7 204iii-5lu
m
!TH ST SW
City of Lynnwood
_ 3
iH
W
a
164TH ST
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Y
i
Sw
AND 162
r_ AB. 182
r "may
1
AA1e 181 '! >
AATe 181 00, Q
-00 --
ry
E�
IE IN(S,E)-206.45
IE OUT(W)-206.35
i
i
EER HAS VERIFIED OL YMPI C VIEW DR.
NG ROOF/FOOTING ----- -
EP SLOPE.
COPE THESE `�� TYPE II CB
OOFDRAINS INTO — — — — — — RIM:243.36 _
4DTHE FOOTING ---------
- - IE IN (S) 6" PVC: 241.86
2 3 FROM THE �` /--�_ _�„-�-----------IEOUT(NE)6"PVC:238.86
_ ' _______—IE(W)36'N12-238.86 C3. Cy. _
-�.• ------ -- - - - - T � Syr
1 DETENTION j/ ��_`' ` --- `� _
C3. 31L— — — F-36"N12 / _`—'
/y� - - - _- - -�� 30' EASEMENT
AFN 196o
27041800202100 / / 4 �- AFN 20:8755
DETENTION ACCESS, A r'G-1
� y2Cy CONTRACTOR TO NO
NOT FOR MAN ENTRY % PG-3 AREA \� NEIGHBOR OF WORK
14T)EC \ EASEMENT FOR STOF
SE EXISTING YARD DRAIN f03 SF 12 C1, I CONTRACTION
4R GATE AND PROVIDE A "fin? 2nnn
CONCRETE SLAB AT END ��4 ST NO REBAR W/CAP FROM
GM -
EXISTING PARKING AREA // Q' LINE / IE 12*RCP(N)-23506
DRAINAGE AND TIE INTO /?4¢— --- CONTRACTOR TO VERIFY
DETENTION SYSTEM �• / E 12CY #WEFT & R%V
EXIST ROOF DRAINS — i SOIL AMENDMENT Et,-
/ OF PhC
/ I 4 A/' �/ /
2' REBAR i ' CONDITION OF CB Al
T CORNER // 1/ 0/ / C3.Q i EXISTING STORM AN
BE VERIFIED BY CONI
INSTALLATION. ADJU
STORM DRAIN PIPE A
/ I MAINTAIN REQUIRE[
58 LF - 6" PVC @ 0.5
EXISTTRENCH / ��� 0.1' OF CURRENT MAX SLOPI
DRAIN / �. LINE 1.
1E v
// \ � \ 48-FOOTING DRAIN
yV f ' \
\y I // \ — — 9 LF - 6" PVC ROOF [
6-� -- — TO COLLECT EXISTINa
%A\:� • �1 // / \ // DRAINAGE SYSTEM F
Ilk
EXISTING ROOF AND
%/�/�• / '\ // FOOTING DRAIN TO
FOUND 1/2- REBAR ADJUST IF NEEDED
i1 _ *. ./ NO GAP, AT CORNER
IE 12-RCP(N E,5)=247.86
SSAIH RW=251.66
IE IN(E)7244.76 +\ _� FOUND 112' RESAR
IE OUT(NE)=244.66 h GIP. ILLEGIBL&
/ \ 0.2'(N) OF CORNER
IE 12VCP-150.W /
v Approximate Scale LEGEND:
1":30'
PG Location of Borings
3 AND DRAINAGE PLAN
^E® Drainage Improvements
p
(`7' 18101 Sunset Way SITE AND EXPLORATION PLAN
Edmonds, Washington
I N C O R P O R A IT D
Project No. Figure No.
02-063 2
A
Proposed
Top of Landslide/
250
36" Detention Tank
Erosion Hazard Area
House per Civil Drawings,
invert el. 238.19'
i 15' Buffer
PG-3
```
PG-2
Loose Red -Br
1 H:1 V Excavation
240
silty SAND
,' — -
Loose SILT
5
Transitional Beds
\ & sA"°
_ _ _ ,'
sm boulder 50/4
MD to Dense D GRAV
clayey SILT, w/ silt�sa d
32 FILL
_
.�
sand/grav beds
_
�
5
Loose to MD
Dense, brn gray,
SILT, NP to Slt P
�` Occ tr sand
8
f to c SAND 31
230
with gravel Olympia Beds
�
15 O
Dense, gray
NP-Slt P 32
2�
SILT, tr sand
62
Dense to VD
f to c SAND
71
some g & silt
220
52
a)
VD, It brn,
C
f to m SAND
�..�
tr silt 41
C
(6
>
50/5
a)
210
Note: Piezometer
screened 20 - 35'
dry on July 5, 2018
50/6
200-
r
190-
o
0 180-J
Graphics Legend:
BH-1
Topographic Surface
Groundwater Seep
Groundwater
Level z$ SP N-value
_ so
Soil Unit �f $$
Boundries 31
——— --_42—————
31
M 0 10 20
h
V
J
Notes:
= 1. Site topography based on survey data provided
by Newport West LLC.
2. Elevations based on NAVD 88.
D
J
V
J
30 40 50 60 70
Distance (ft.)
Olympic View Drive
80 90 100 110 120 130
A'
r— 250
- 240
- 230
220 a)
a)
C
C
O
- 210-2
- 200
- 190
- 180
RELATIVE DENSITY / CONSISTENCY
SAND /GRAVEL
SILT / CLAY
SPT
Approx. Relative
SPT
Approx. Undrained Shear
DensityN-values
:
Density (%)
Consistency
N-values
Strength (psf)
Very Loose
<4
<15
Very Soft
<2
<250
Loose
4 to 10
15 - 35
: Soft
2 to 4
250 - 500
Med. Dense
10 to 30
35 - 65
Med. Stiff
4 to 8
500 -1000
Dense
30 to 50
65 - 85
: Stiff
8 to 15
1000 - 2000
Very Dense
>50
85 -100
Very Stiff
15 to 30
2000 - 4000
: Hard
>30
>4000
UNIFIED SOIL CLASSIFICATION SYSTEM
MAJOR DIVISIONS GROUP DESCRIPTIONS
•�'
GW: Well -graded GRAVEL
Gravel GRAVEL (<5%fines)
.....:......................................................
50% or more of the coarse
GP Poorly -graded GRAVEL
fraction retained on the #4
sieve. Use dual symbols leg.
o p
GM Silty GRAVEL
GP -GM) for 5% to 12%fines. GRAVEL (>12% fines)
.....................................................................
................ • • • ................
GC : Clayey GRAVEL
..............................................................
"'
SW: Well -graded SAND
Sand ; SAND <5 /o fines
""
.;..'>
50% or more of the coarse
SP : Poorly -graded raded SAND
.............................
fraction passing the #4 sieve.
Use dual symbols leg. SP-SM
g )
. >
....:......................................................
SM : Silty SAND
for 5%to12%fines. SAND (>1 2% fines)
......................................................................
.........................................................
SC : Clayey SAND
.............................................................
:
ML : SILT
Liquid Limit < 50
.....:......................................................
CL : Lean CLAY
............................................................
==
—
Silt and Clay
OL : Organic SILT or CLAY
50%or more passing #200 sieve :..................................
:......................................................
MH : Elastic SILT
Liquid Limit > 50
CH , Fat CLAY
.......................... .......................................
OH Organic SILT or CLAY
.......
u
HighlyOrganic Soils
PT : PEAT
Notes: 1. Soil exploration to s contain material descriptions based on visual observation and field tests using a system
modified from the Uniform Soil Classification System (USCS). Where necessary laboratory tests have been
conducted (as noted in the "Other Tests" column), unit descriptions may include a classification. Please refer to the
discussions in the report text for a more complete description of the subsurface conditions.
2. The graphic symbols given above are not inclusive of all symbols that may appear on the borehole logs.
Other symbols may be used where field observations indicated mixed soil constituents or dual constituent materials.
DESCRIPTIONS OF SOIL STRUCTURES
Layered: Units of material distinguished by color and/or
Fissured: Breaks along defined planes
composition from material units above and below
Slickensided: Fracture planes that are polished or glossy
Laminated: Layers of soil typically 0.05 to 1 mm thick, max. 1 cm
Blocky: Angular soil lumps that resist breakdown
Lens: Layer of soil that pinches out laterally
Disrupted: Soil that is broken and mixed
Interlayered: Alternating layers of differing soil material
Scattered: Less than one per foot
Pocket: Erratic, discontinuous deposit of limited extent
Numerous: More than one per foot
Homogeneous: Soil with uniform color and composition throughout
BCN: Angle between bedding plane and a plane
normal to core axis
COMPONENT DEFINITIONS
COMPONENT
SIZE / SIEVE RANGE
COMPONENT
SIZE / SIEVE RANGE
Boulder:
: > 12 inches
Sand
Cobbles:
3 to 12 inches
Coarse Sand:
#4 to #10 sieve (4.5 to 2.0 mm)
Gravel
Medium Sand:
#10 to #40 sieve (2.0 to 0.42 mm)
Coarse Gravel:
3 to 3/4 inches
Fine Sand:
#40 to #200 sieve (0.42 to 0.074 mm)
Fine Gravel:
3/4 inches to #4 sieve
Silt
0.074 to 0.002 mm
Clay
<0.002 mm
TEST SYMBOLS
for In Situ and Laboratory Tests
listed
in "Other Tests" column.
ATT
Atterberg Limit Test
Comp
Compaction Tests
Con
Consolidation
DID
Dry Density
DS
Direct Shear
%F
Fines Content
GS
Grain Size
Perm
Permeability
PP
Pocket Penetrometer
R
R-value
SG
Specific Gravity
TV
Torvane
TXC
Triaxial Compression
UCC
Unconfined Compression
Sample/In Situ test types and intervals
2-inch OD Split Spoon, SPT
(140-lb. hammer, 30" drop)
H3.25-inch
OD Spilt Spoon
(300-lb hammer, 30" drop)
Non-standard penetration
test (see boring log for details)
Thin wall (Shelby) tube
Grab
Rock core
®
Vane Shear
MONITORING
WELL
SZ
Groundwater Level at
time of drilling (ATD)
1
Static Groundwater Level
Cement / Concrete Seal
Bentonite grout / seal
Silica sand backfill
Slotted tip
Slough
Bottom of Boring
MOISTURE CONTENT
Dry
Dusty, dry to the touch
Moist
Damp but no visible water
Wet
Visible free water
PanGEO Terms and Symbols for
1 N C 0 R P 0 R A T E D Boring and Test Pit Logs Figure A-1
Phone: 206.262.0370
Project: Landslide Remediation
Surface Elevation:
Job Number: 02-063
Top of Casing Elev.:
Location: 18101 Sunset Way, Edmonds, WA
Drilling Method: HSA
Coordinates: Northing: , Easting:
Sampling Method: SPT
$
CL
0
O
Z
C1
Co
Q
C
(n
m
L
a)
O
o
E
MATERIAL DESCRIPTION
N-Value A
PL Moisture ILL
ROD Recovery
®EJ
0 50 100
0
3
Loose, brown SILT: moist, some fine sand, non -plastic to slightly
S-1
3
plastic, mottled, occasional angular soil clasts, mixed. (Fill /
4
Colluvium).
.........
.........
.........
.........
1
Trace to some fine sand, slightly plastic, no dilatancy, occasional
........
........
........
.........
.........
.........
S-2X
1
charcoal, gravel.
3
5
2
Medium stiff, gray and brown, clayey SILT: moist, low plastic, slow to
S-3X
5
no dilatancy, homogeneous, laminated. (Transitional Beds).
5
Medium dense, brown gray SILT with fine sand: moist, non -plastic
5
homogeneous, rusty veins and mottles, laminated. (Transitional
S-4
6
Beds).
6
10
5
Medium dense to dense, brown gray, interbedded, fine to medium
SAND and SILT: moist, generally non -plastic silt, fine bedded to
S-5
9
laminated, beds 4 to 6 inches, rusty bands along contacts.
9
(Transitional Beds).
One low plastic, silt lean CLAY interbed.
6
Rusty bands.
S-6
14
15
15
S-7
10
20
29
Dense to very dense, light brown to rusty brown, fine to coarse SAND:
moist, trace to some silt, trace fine, tabular gravel, finer / coarser
layering, slightly rusty bands and laminae, moderately weathered,
laminated. (Olympia Gravel).
20
27
Becoming very moist, beds 4 to 6 inches, silt interbed at 21.3 feet.
S-8
37
32
Bottom of Boring.
25
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
Completion Depth: 21.5ft
Remarks: No groundwater encountered during drilling.
Date Borehole Started: 3/30/18
Date Borehole Completed: 3/30/18
Logged By: S. Evans
Drilling Company: CN Drilling
FbnGEO LOG OF TEST BORING PG-1
I N C O R P G R A T E D Figure A-2
The stratification lines represent approximate boundaries. The transition may be gradual. Sheet 1 Of
Project: Landslide Remediation
Surface Elevation:
Job Number: 02-063
Top of Casing Elev.:
Location: 18101 Sunset Way, Edmonds, WA
Drilling Method: HSA
Coordinates: Northing: , Easting:
Sampling Method: SPT
$
CL
0
O
Z
C1
Co
Q
C
(n
m
L
a)
O
o
E
MATERIAL DESCRIPTION
N-Value A
PL Moisture LL
ROD Recovery
®EJ
0 50 100
0
Loose, brown to brown gray, inter -layered SILT and fine to medium
S-1
2
SAND: moist, non -plastic to slightly plastic, occasional gravel, mixed
3
texture. (Fill).
S-2
9
12
11
Medium dense, dark gray, silty GRAVEL with sand: moist, occasional
brown layer, gravel sub -rounded, tabular to prismatic, homogeneous,
layered. (Fill).
0 o
.........
.........
5
2
Loose, light brown gray SILT: moist to very moist, non -plastic,
homogeneous, laminated, with rusty swirls. (Transitional Beds).
S-3
2
3
.........
.........
.........
.........
.........
.........
.........
.........
2
Becoming light green gray, non -plastic to slightly plastic, rusty bands,
.........
.........
.........
.........
.........
.........
S-4
4
finely fractured at 8.5 feet, micaceous.
4
.
. . . . . . . . .
10
5
Gray and rusty brown, trace fine sand, slightly plastic with slow to rapid
......
.........
S-5
6
dilatancy, rusty fractures and bands, some sharp bedding contacts.
9
.........
... .....
... .....
.........
.........
.........
4
Light green gray SILT occasional sandy laminae.
.........
.........
.........
.........
.........
.........
15
S-6
11
15
14
.... ....
.........
a
e
e
Medium dense to very dense, brown gray, fine to coarse SAND: moist,
some gravel and silt, massive to indistinctly laminated and bedded,
moderately weathered with rusty staining. (Olympia Gravel).
Fine to coarse SAND with gravel, gravel sub -angular and blocky to
S-7
32
tabular, massive.
30
20
S-8X
16
26
Rusty brown, fine to coarse SAND, scattered gravel, slightly to
moderately weathered, laminated to massive.
26
Bottom of Boring.
25
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
Completion Depth: 21.Oft
Remarks: No groundwater encountered during drilling.
Date Borehole Started: 3/30/18
Date Borehole Completed: 3/30/18
Logged By: S. Evans
Drilling Company: CN Drilling
FbnGEO LOG OF TEST BORING PG-2
I N C O R P G R A T E D Figure A-3
The stratification lines represent approximate boundaries. The transition may be gradual. Sheet 1 Of
Project: Landslide Remediation
Job Number: 02-063
Location: 18101 Sunset Way, Edmonds, WA
Coordinates: Northing: , Easting:
o
(D
C
F
i
N
Q
Q
(n
L
E
C
M
^
V,
M
L J
O
0
`[I
15
20
25
Surface Elevation:
Top of Casing Elev.:
Drilling Method:
Sampling Method:
MATERIAL DESCRIPTION
HSA
SPT
N-Value A
PL Moisture LL a0i
1 I E
® RQD Recovery ® c
0 50 100
Loose, red brown, silty, fine SAND with gravel: moist.
(Ablation Till).
Medium dense to dense, gray, clayey SILT with fine sand:
moist, gravelly and sandy interbeds. (Transitional Beds).
S-1
Z
50/4
Small boulder, blow counts at 5 feet unreliable.
>
1
>
>
Dense, speckled brown gray, fine to coarse SAND with
gravel: slightly moist, some silt, layered, moderately
weathered, gravel sub -rounded and blocky, some coarse
S-2
X4
19
grained granitic gravels. (Olympia Gravels).
12
<
Sample tube at 15 wet, sample moist, likely perched water
around 13 feet. ----------------- J
`-------
. . .
.........
. . :
.........
S-3
$
15
17
Dense, brown gray SILT: moist, non -plastic to slightly
plastic, occasional rusty pockets, trace fine sand and sandy
laminae, scattered gravel, laminated with dips to 10°.
(Olympia Gravels).
.........
....... .
....... .
.........
.........
.........
.........
.........
.........
.........
Very dense, light brown, fine to medium SAND: moist, fine
.........
.........
.........
.........
to coarse interbeds, homogeneous,trace to some
non -plastic silt, slightly weathered. (Olympia Gravels).
13
S-4
26
MEN
45
20
Brown, fine to medium SAND, wet gray bed at top,
S-5
26
1
laminatedpossible perched water layer at 20 feet.
Completion Depth: 36.0ft Remarks: No significant groundwater encountered during drilling. Two thin perched water
Date Borehole Started: 5/24/18 lenses observed.
Date Borehole Completed: 5/24/18
Logged By: S. Evans
Drilling Company: CN Drilling
C_1T7® LOG OF TEST BORING PG-3
I N C O R P O R A T E D Figure A-4
The stratification lines represent approximate boundaries. The transition may be gradual. Sheet 1 of 2
Project: Landslide Remediation
Surface Elevation:
Job Number: 02-063
Top of Casing Elev.:
Location: 18101 Sunset Way, Edmonds, WA
Drilling Method: HSA
Coordinates: Northing: , Easting:
Sampling Method: SPT
N-Value A
O
Z
o
PL Moisture ILL
Q
~
E
MATERIAL DESCRIPTION
CL
0
Co
�
El Recovery ®
c
m
O
0 50 100
Very dense, light brown, fine to medium SAND: moist, fine
to coarse interbeds, homogeneous,trace to some
non -plastic silt, slightly weathered. (Olympia Gravels).
(Continued)
30
31
Light brown sand with gray bed at top above a thin silt bed,
S-6
47
slightly weathered, graded bedding with 6 inch beds.
50/5
35
S-7
36
Light brown, fine to medium SAND, homogeneous, moist,
50/6
trace to some silt.
Bottom of Boring.
40
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
45
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
50
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
.........
Completion Depth: 36.Oft
Remarks: No significant groundwater encountered during drilling. Two thin perched water
Date Borehole Started: 5/24/18
lenses observed.
Date Borehole Completed: 5/24/18
Logged By: S. Evans
Drilling Company: CN Drilling
LOG OF TEST BORING PG-3
PmGE@)
I N C O R P G R A T E D Figure A-4
The stratification lines represent approximate boundaries. The transition may be gradual. Sheet 2 Of 2