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FIELD REPORT
Date Project Name Project No. Report No.
05/19/2022 Renton Elementary School 16 20180398E003 009
Location Municipality AESI Project Manager AESI Field Rep
1075 Duvall Ave NE Renton Bruce Guenzler, L.E.G. Kelsey McCrady
Permit No. Client/Owner Attn Requested By
Renton School District No. 403 Ed Thomson Client
Engineer/Architect General Contractor Grading Contractor Weather
LPD / Hutteball + Oremus Cornerstone Continental Dirt Contractors/ Jerry Jr. Partly cloudy, 50’s
THE FOLLOWING WAS NOTED:
Associated Earth Sciences Inc. (AESI) was on site, as requested, to observe building subgrade preparation. Upon arrival, we met with
representatives from Cornerstone and Continental Dirt Contractors (CDC).
Building Foundation Subgrade Preparation:
Upon arrival, CDC was continuing preparation of the future building pad subgrade south/southwest of Wetland B. In the area work was
performed today, soil and current ground surface elevation consisted of a very moist to wet, dark brown, silty fine sand with occasional
organics. Using a ½ diameter steel soils T-probe, this material probed between 1 and 2 feet. While onsite, AESI observed as the
contractor removed the soft soils in an area approximately 33-feet wide by 55-feet long by approximately 2.5-feet deep. The contractor
excavated in the area until hard native till was exposed. AESI probed the moist, gray, sand with silt native till to depths of less than 2
inches and noted the material appeared firm and unyielding underfoot. The contractor then backfilled the area using 2.5-inch minus
crushed rock material in 1-foot thick lifts. Each lift was compacted using a vibratory roller. Wile onsite today, AESI observed the
contractor remove approximately 170 cubic yards of soft soils (bank yardage). See Figure 1 below for location. AESI will return tomorrow
to continue observation of building pad subgrade preparation.
Figure 1: Approximate location of subgrade over excavation outlined in blue.
Date Project Name Project No. Report No.
05/19/2022 Renton ES 16 20180398E003 009
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FIELD REPORT
Photo 1: Overexcavation observed today. Note organic material in the soft soils.
Photo faces northeast.