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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.
08/01/2022 Renton Elementary School 16 20180398E003 044
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 on-site in the afternoon for observation of vapor barrier, capillary break, storm line backfill,
and grease interceptor backfill. Upon arrival, AESI met with Jerry Jr. of CDC.
Vapor Barrier Observation – Area B
While on-site, we observed that vapor barrier had been placed in Area B, as noted in Figure 1 below. The vapor barrier was
confirmed to be 15 mils and placed over 4-inches of capillary break. In our opinion, the vapor barrier completed today appeared
consistent with project plans.
Capillary Break Observation – Area A
A section of capillary break was completed in Area A today as noted in Figure 2 below. The capillary break consisted of 4” of clean
(no fines) 5/8” crushed chip rock. In our opinion, capillary break completed today in the noted areas appeared consistent with
project plans and our recommendations.
Remediated Area Proof-Roll
While on-site, CDC informed AESI that due to a leaking water hose, an area near CB #4 and SS #3 had been pumping and yielding. Prior to our arrival, CDC had removed approximately 1.5’ of unsuitable material in the area and replaced it with 1’ of on-site soils
and 0.5’ of crushed rock. CDC used a hoepac to compact the first lift of onsite soils and a large vibratory roller to compact the
crushed rock. AESI observed a proof-roll with the large vibratory roller. Little to no movement was observed and we did not see any
significant rutting or pumping during the proof-roll. In our opinion, we found the observed area to be firm and unyielding and
suitable for support of planned paving. See Figure 3 for the location of proof roll observed today.
Grease Interceptor Backfill
While on-site, we observed that approximately 8’ of backfill had been placed around a grease interceptor near the eastern edge of
Area A, near SS #5 (Figure 3). The backfill consisted of on-site soils, was 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 rest of the observed area of backfill, to be firm and unyielding and suitable
for planned landscaping.
Storm Line Backfill
While on-site, we observed that approximately 4’-5’ of storm line backfill, consisting of on-site soils, had been placed between SD
#23 and SD #56 (Figure 4). The backfill was placed in 1’ to 1.5’ lifts and compacted with a hoepac and vibratory roller. 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 rest of the observed area of the storm line backfill, to be firm and unyielding and
suitable for support of planned paving.
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Date Project Name Project No. Report No.
08/01/2022 Renton ES 16 20180398E003 044
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FIELD REPORT
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 4 0 129.9/9.2 122.8 5.1 95 Pass
2 See Figure 3 -2 133.5/8.2 129.1 8.3 97 Pass
3 See Figure 3 -3 133.5/8.2 127.3 7.8 95 Pass
4 See Figure 3 -2 133.5/8.2 130.1 10.2 98 Pass
Figure 1. Sheet S2.02 The approximate location of vapor barrier observed today in Area B is indicated in red. North is to
the right of the figure.
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Date Project Name Project No. Report No.
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FIELD REPORT
Figure 2. Sheet S2.01 The approximate location of capillary break observed today in Area A is indicated in red. North is to
the right of the figure.
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Date Project Name Project No. Report No.
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FIELD REPORT
Figure 3. Sheet C3.1 The location of grease interceptor backfill observed today is indicated in blue. The approximate
location of the proof-roll observed today is incdicated in green. North is to the right of the figure.
4 3
2
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Date Project Name Project No. Report No.
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FIELD REPORT
Figure 3. Sheet C2.2 The observed area of storm line backfill is indicated in blue. North is to the right of the figure.
1
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FIELD REPORT
Photo 1. The proof-roll observed today.