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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.
08/11/2022 Renton Elementary School 16 20180398E003 048
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 morning to observe progress on detention facilities #1A and #1B, sidewalk and
curb subgrade and footing backfill. While onsite, AESI met with Jerry Jr. of CDC and Gerard of Cornerstone.
Detention Facilities #1A and #1B
Upon arrival, AESI noted that the contractor had completed placement of top protective layer in Facility #1A and had begun placing
6” of washed aggregate across the base of the facility. AESI observed that the contractor had partially completed placement of the
liner and the liner protection geotextile at Facility #1B. The protective nonwoven fabric consisted of Tencate Mirafi PT800E 8oz
delivered in 15 foot by 300 foot rolls. The liner was delivered to the site prefabricated in a single folded sheet with no field seaming,
and reportedly consisted of PVC. There was no labelling directly on the liner to confirm the polymer type or thickness. Placement of
liner and protection geotextile completed today was generally consistent with sheet C2.11 in our opinion, and the nonwoven
geotextile appeared consistent with project Specification section 33 4000 2.6 based on the product information sheet supplied by
ACF West. During our visit the base protective layer of geotextile and the liner was placed in facility #1B, the top protective layer was
not placed pending sealing around control structures.
Offsite Sidewalk and Curb Subgrade
While onsite, AESI observed that an area of sidewalk and curb subgrade had been prepared for observation near the intersection of
Duvall Ave NE and NE 10th Street (Figure 2). AESI used a ½ diameter steel soils T-probe to assess the subgrade conditions. Several
areas of the sidewalk subgrade probed past 12”. The contractor moisture conditioned the subgrade and compacted with a hoepac
and jumping jack, per our recommendations. In a small area the contractor replaced the loose material with crushed rock and
compacted with the jumping jack. AESI reassessed subgrade conditions. Generally, the area probed less than 4” to 6”. In our opinion,
based on our observations we found the area of subgrade observed today to be firm and unyielding and suitable for support of
planned sidewalk and curb sections.
Footing Backfill – Area B
While on-site, we observed that approximately 2’ of footing backfill had been placed around a footing on the northern edge of Area
B (Figure 3). The backfill, consisting of on-site soils, was placed in 1’ lifts and compacted with a hoepac. AESI used a density gauge to
test the newly 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 footing backfill to be firm and unyielding.
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 3 0 129.9/9.2 125.1 7.8 96 Pass
2 See Figure 3 0 129.9/9.2 124.6 9.9 96 Pass
3 See Figure 3 0 129.9/9.2 122.8 10.1 95 Pass
4 See Figure 3 0 129.9/9.2 126.0 10.1 97 Pass
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Date Project Name Project No. Report No.
08/11/2022 Renton ES 16 20180398E003 048
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FIELD REPORT
Photo 1. Liner placement progress observed in Facility #1B.
Photos 2 & 3. Facility #1A progress observed.
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Date Project Name Project No. Report No.
08/11/2022 Renton ES 16 20180398E003 048
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FIELD REPORT
Photo 4. The area of sidewalk subgrade observed today.
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Date Project Name Project No. Report No.
08/11/2022 Renton ES 16 20180398E003 048
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FIELD REPORT
Figure 1. Sheet C2.1 The approximate area of Stormwater Detention Facilitys #1A and #1B progress observed today.
North is to the right.
Facility #1B - Liner and
the liner protection
geotextile partially
completed.
Facility #1A – Top
protective layer and
placement of 6” of aggregate completed.
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Date Project Name Project No. Report No.
08/11/2022 Renton ES 16 20180398E003 048
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FIELD REPORT
Figure 2. Sheet C6.2 The approximate location of sidewalk and curb subgrade observed today is indicated in red. North is
to the right.
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08/11/2022 Renton ES 16 20180398E003 048
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FIELD REPORT
Figure 3. Sheet S2.02 The approximate area of footing backfill observed today is indicated in red. North is to the right.
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