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Kirkland | Tacoma | Mount Vernon 425-827-7701| www.aesgeo.com
Date Mailed:
Principal / PM: Bruce Guenzler, L.G., L.E.G.
This document is considered a DRAFT until signed or initialed by an AESI Principal or Project Manager
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FIELD REPORT
Date Project Name Project No. Report No.
01/12/2023 Renton Elementary School 16 20180398E003 078
Location Municipality AESI Project Manager AESI Field Rep
1075 Duvall Ave NE Renton Bruce Guenzler, L.E.G. Jackson Lundgren, G.I.T.
Permit No. Client/Owner Attn Requested By
B21004604 Renton School District No. 403 Ed Thomson Contractor
Engineer/Architect General Contractor Grading Contractor Weather
CPL / Hutteball + Oremus Cornerstone/Kyle Continental Dirt Contractors/ Jerry Jr. Sunny, 80’s
THE FOLLOWING WAS NOTED:
Associated Earth Sciences Inc. (AESI) was onsite at 9:30am at the request of the general contractor to observe native soil
conditions and placement of sidewalk subgrade along Duvall Avenue NE at the Renton School District No. 403
development. While onsite we met with representatives from Continental Dirt Contractors.
Sidewalk Subgrade Conditions
AESI arrived onsite and observed contractor grading an approximately 250-foot portion of a of a 600-foot sidewalk along
Duvall Avenue NE at the eastern margin of the Renton School District No. 403 development. AESI observed contractor
placing 4 to 6-inches of 5/8-inch crushed rock along native subgrade and compacting with a vibratory plate compactor.
Contractor relayed up to 24-inches of type 17 had been placed in areas that were below grade (marked on plans below)
and capped with 4 to 6-inches of 5/8-inch crushed rock compacted with a vibratory plate compactor. AESI used a ½-inch
steel T-probe to probe locations along the sidewalk subgrade and observed an approximately 6-foot by 4-foot area
(marked on plans below) where subgrade material was saturated and not of suitable density. AESI recommended over-
excavation up to 24-inches and backfill with 2-inch to 4-inch quarry spalls capped with 5/8-inch crushed rock compacted
with a vibratory plate compactor in areas where saturated or material is encountered. AESI observed that remaining
native subgrade as well as compacted import backfill material was dense, firm, unyielding, and suitable for support of
the proposed sidewalk.
AESI departed the site at 1:30pm and will return for further observations and testing as requested by the client.
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Date Project Name Project No. Report No.
01/12/2023 Renton ES 16 20180398E003 0.78
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FIELD REPORT
Figure 1: Completed area of grading/ compaction in green, area of recommended over-excavation and backfill with 2-inch to 4-inch quarry spalls in
red, ungraded area in yellow (as of 1/12/2023)
Contractor relayed up to 24-inches of type 17 placed to bring area to grade
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Date Project Name Project No. Report No.
01/12/2023 Renton ES 16 20180398E003 0.78
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FIELD REPORT
Figure 2: Sidewalk subgrade with type 17 basecourse, capped with 5/8-inch crushed rock
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Date Project Name Project No. Report No.
01/12/2023 Renton ES 16 20180398E003 0.78
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FIELD REPORT
Figure 2: contractor placing type 17 basecourse (in areas below grade) capped with 5/8-inch crushed rock