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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.
08/16/2022 Renton Elementary School 16 20180398E003 051
Location Municipality AESI Project Manager AESI Field Rep
1075 Duvall Ave NE Renton Bruce Guenzler, L.E.G. Samantha Parker
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 in the afternoon to observe progress on detention facilities #1A and #1B.
Detention Facility #1A
AESI observed that prior to our arrival, 2.5’ to 3’ of backfill had been placed over Facility #1A. CDC informed AESI that the backfill,
consisting of onsite soil had been placed in one 2’ lift and then a 0.5’ to 1’ lift. AESI observed CDC using a vibratory roller to compact
the backfilled area. AESI used a density gauge to test the newly backfilled area. Test results met or exceeded 95% compaction (Table
1). In our opinion, based on our observations and test results, we found the observed backfill to be firm and unyielding and suitable
for support of planned paving. See Figure 1 for location of observed areas.
Detention Facility #1B
AESI observed, that placement of stormwater chambers was still underway in Facility #1B. CDC had used a Telebelt to place
aggregate around and 0.5’ above the stormwater chambers in a section the western end of the Facility. CDC informed AESI that they
plan to compact the top 0.5’ of aggregate with a plate compactor. See Figure 1 for location of observed areas.
Water Line Backfill
While on-site, we observed that approximately 3’ of water line backfill, consisting of 5/8” minus crushed rock, had been placed in an
across Chelan Ave NE (Figure 2). The backfill was moisture conditioned, placed in 1’ to 1.5’ lifts, and compacted with a hoepac. AESI
used a density gauge to test the new backfilled sections. Test results met or exceeded 95% compaction (Table 1). In our opinion,
based on our observations and test results, we found the observed area of the water line backfill, to be firm and unyielding and
suitable for support of planned paving.
Table 1: Compaction Test Results
Test No. Location
Approximate
Backfill Depth Relative to Existing
Ground Surface (ft)
Proctor (ASTM D1557) Dry Density (pcf) Moisture % Compaction % Pass/Fail Notes
1 See Figure 1 0 126.9/10.5 119.9 7.8 95 Pass
2 See Figure 1 0 126.9/10.5 121.4 9.0 96 Pass
3 See Figure 1 0 129.9/9.2 125.5 7.3 97 Pass
4 See Figure 1 0 129.9/9.2 127.1 8.1 98 Pass
5 See Figure 1 0 126.9/10.5 122.3 8.0 96 Pass
6 See Figure 1 0 126.9/10.5 120.0 7.9 95 Pass
7 See Figure 2 0 141.0/7.4 134.1 6.4 95 Pass
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Date Project Name Project No. Report No.
08/16/2022 Renton ES 16 20180398E003 051
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FIELD REPORT
Photos 1 & 2. Progress observed in Facility #1B.
From sheet C2.1 Facilities #1A and #1B progress observed today. North is to the right.
Facility #1B – Chamber
and aggregate installation
underway.
Facility #1A – Placement
of 2.5’ to 3’ of backfill
complete.
1 6
2
3
5
4
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Date Project Name Project No. Report No.
08/16/2022 Renton ES 16 20180398E003 051
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FIELD REPORT
Sheet C3.1 The location of water line backfill observed today is indicated in blue. North is to the right.
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