9530 215th Addition - DFR 5-21-21GEOTECHNICAL ENGINEERING • ENVIRONMENTAL ENGINEERING
CONSTRUCTION TESTING & INSPECTION
May 21, 2021
Mr. Chevy Chase (E-Mail)
20301 Maplewood Drive
Edmonds, WA 98026
RE: CONSTRUCTION TESTING AND INSPECTION
9530 215'h Addition
9530 215" Street SW
Edmonds, Washington
Dear Mr. Chase,
KA No. 096-21163
Perm it No. BLD2021-0177
In accordance with your request and authorization, our firm performed construction testing and inspection
for the above -referenced project. The sampling and testing was performed by our inspectors and reports
are included.
If you have any questions, or if we can be of further assistance, please do not hesitate to contact our
office.
Respectfully submitted,
KRAZAN & ASSOCIATES, INC.
effre% S. Mercer
Operations Manager
Pacific Northwest Division
J SM/lkj
C.C. Chi ENGINEERING (EMAIL)
CITY OF EDMONDS
4303 198t1 Street SW, Lynnwood, Washington 98036 • (425) 485-5519 • FAX (425) 485-6837
With Offices Serving the Western United States
09621163 DFR
-Kra -Zan &ASSOCIATES
GEOTECHNICAL ENGINEERING • ENVIRONMENTAL ENGINEERING
CONSTRUCTION TESTING & INSPECTION
FORENSIC INVESTIGATION
Date:
Project No.:
Project:
Project Location:
Krazan PM:
May 11, 2021
096-21163
9530 215' Addition
9530 215t' St SW, Edmonds
WA
JM/MR
FIELD REPORT
Report No.:
21163DFRO51121-NG
Contractor:
Property Owner
Permit No.:
BLD2021-0177
Inspector:
Niccolo Guiao
Jurisdiction:
City of Edmonds
Weather:
Sunny Temp: 50's
A Krazan geotechnical representative visited the project site today for a footing subgrade evaluation.
Proiect Description
The house remodel project generally includes the conversion of the attached carport into dining and laundry
room areas. The house addition is located at the northeast exterior of the residence. The construction will
include the placement of new wood framed walls. The new wood framed walls would be supported by the new
exterior perimeter (continuous) footings.
Geology Man
We reviewed the "Geologic Map of the Edmonds East and Part of the Edmonds West Quadrangles,
Washington" by James P. Minard (1983) during our project research. The geologic map indicates that the site
vicinity is underlain by Quaternary Vashon glacial till (Qvt). Glacial till is typically compact clay, silt, sand,
gravel, cobbles and boulders deposited at the base of the continental ice sheet.
Pro i ect Plans
We have been provided with structural plans titled, "9530 2151 Addition" by CG Engineering dated 01/29/21.
The structural plans indicate an assumed allowable soil bearing pressure of 1,500 pounds per square foot (psf).
Detail 2 on sheet S3.1 shows a minimum footing embedment depth of 18-in.
Footins: Subarade Evaluation
Upon our arrival today, the contractor had excavated to expose the footing subgrade soils for the new exterior
perimeter (continuous) footings of the planned addition. The footing excavation was about 18-in below
surrounding grade. We observed that the existing footings of the carport columns extended to depths below the
new footing subgrade elevation.
We observed the exposed footing subgrade soils consist of grayish brown silty sand with gravel and trace
organics. We evaluated the exposed footing subgrade soils using a %-in diameter steel T-probe rod. The
exposed footing subgrade soils probed about 6-in to 12-in under moderate pressure, indicating loose to
medium dense conditions. We interpreted the exposed footing subgrade soils to be fill.
This field report is for information purposes only.
Superintendent/Representative: Technician: Niccolo Guiao
4303 —19811 Street SW • Lynnwood, Washington 98036 • (425) 485-5519 • FAX (425) 485-6837
With Offices Serving the Western United States
KRAZAN & ASSOCIATES, INC.
09621163DFRO51121-NG
9530 215' Addition
Page No. 2
To aid with our footing subgrade evaluation, we performed two (2) shallow hand tool explorations along the
northern footing line of the addition. Loose footing subgrade soils were observed along the northern footing
linc.
The hand tool explorations were performed to a depth of about 1-ft below the footing subgrade elevation. The
soils exposed at the bottom of the explorations consisted of grayish brown silty sand with gravel. We evaluated
the soils at the bottom of the explorations using a %-in diameter steel T-probed rod. The soils probed about 2-
to 4-inches under moderate pressure, indicating medium dense condition. We interpreted the soils exposed at
the bottom of the explorations to be native soils.
Recommendations
Based on our field observations, the footing subgrade soils of the new exterior perimeter (continuous) footings
are underlain by loose to medium dense soils.
Since the exposed soils in the footing excavations are in near optimum moisture content, and should be readily
compactable, we recommend compaction of the exposed soils to firm and unyielding condition.
Any sloughed soils or debris should be removed from the footing subgrade prior to the placement of concrete.
Conclusion
Provided our recommendations with the footing subgrade compaction are implemented, it is our opinion that
the footing subgrade soils should provide adequate support for the assumed allowable bearing pressure of
1,500 pounds per square foot (psf).
Site photos are attached for reference.
Site Photos:
This field report is for information purposes only
Superintendent/Representative:
— i,
T'
01'
Technician: Niccolo Guiao
Krazan & Associates, Inc.
Offices Serving The Western United States
KRAZAN & ASSOCIATES, INC.
Site Plan:
09621163DFRO51121-NG
9530 215' Additiion
Page No. 3
Approximate location of the hand tool
explorations performed today.
FIEID VfRK#Q
r-- - -
I
wwt &ik?sYRFMF. wo
70.5TFND M'f 'ail 4T4NYM ' 1 44' W7FFURED.TYP. 1
'1 1
-'MFi 6 FPMYr VWTD 1 I
FIRST MGWJ"ILTI HIT-W2M
le' NTIN twOLD, TTR 1 dJGRA7E 1
F��FTG
r--1
r--1 r-1 r—'1 —
1
L_J
L_J wreB _aks L_J L_J L
r-'T
L_J
L_J
L_J
L_1 L_J n L_J
r-
L
�
rill
r-n
t"a
_
L
L_J
- - L-J
L_J
_ r-i _
___j
_J
_r �
L_J
Approximate location of footing
subgrade area evaluated today.
r
r
-
r-i
/.
L_J
L_J
d-_.I
C/4FBEtw*,r0' II'
This field report is for information purposes only.
Superintendent/Representative: ( �� Technician: Niccolo Guiao
Krazan & Associates, Inc.
Offices Serving The Western United States
�h8
><PA y[W t+A
�
"WINl ffNFRTkf
NEWt.Q1.AlEh�t I
1
1