160514E002_L 8-5-19 New Retail Building (Final).pdf
Kirkland Office | 911 Fifth Avenue | Kirkland, WA 98033 P | 425.827.7701
Mount Vernon Office | 508 S. Second Street, Suite 101 | Mount Vernon, WA 98273 P | 425.827.7701
Tacoma Office | 1552 Commerce Street, Suite 102 | Tacoma, WA 98402 P | 253.722.2992
www.aesgeo.com
August 5, 2019
Project No. 160514E002
Behar Company
1000 Second Avenue, Suite 3230
Seattle, Washington 98104
Attention: Mr. Matt Steiner
Subject: Final Summary Letter
Edmonds Village
22019 State Route 99
Edmonds, Washington
Dear Mr. Steiner:
Associated Earth Sciences, Inc. (AESI) provided geotechnical monitoring during construction
of the above-referenced project. AESI was onsite part-time between March 19, 2019, and
April 16, 2019. Our observations were documented in previously submitted Daily Field Reports
Nos. 1 through 5. AESI was not onsite to observe all earthwork activities.
Foundation Subgrade Verification
AESI observed the subgrades for new interior and exterior building foundations. Overexcavation
of existing uncontrolled fill down to suitable native sediments was recommended by AESI
where encountered under new foundations. After overexcavation of the uncontrolled fill was
completed by the contractor, AESI observed foundation subgrades consisting of suitable native
sediments. Foundation subgrades consisting of dense to very dense native soils were evaluated
with a ½-inch-diameter steel soil probe, and penetration depths into the soil were generally less
than 2 inches. In our opinion, the exposed native sediments were capable of providing an
allowable bearing pressure of 3,000 pounds per square foot (psf).
8fr,4 '3
Slab Subgrade Verification
AESI observed the subgrade for new slab area at the western portion of the building. The
contractor placed approximately 12 inches of structural fill followed by 4 inches of 5/ inch
crushed rock across the new slab area. The subgrade was evaluated with a 34-inch-diameter
steel soil probe, and penetration depths into the soil were generally less than 2 inches and
suitable for slab support.
Utility Backfill
AESI monitored placement and compaction of structural fill used to backfill plumbing and
stormwater excavations. AESI observed the backfill placed in lifts and compacted with jumping
jack and hoe pack equipment. In-place density tests were conducted on the utility trench
backfill using a nuclear densometer gauge. In all cases, utility trench backfill was found to meet
or exceed the minimum compaction requirements.
Closure
To the best of our knowledge, all work observed by AESI was completed in general accordance
with the approved plans, and our verbal and written recommendations.
If you have any questions, please call our office at 425-827-7701.
Sincerely,
ASSOCIATED EARTH SCIENCES, INC.
Kirkland, Washington
Matthew A. Mi -r, P.E.Stephen A. Siebert, P.E.
Principal Engineer Associate Geotechnical Engineer
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