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HomeMy WebLinkAbout20180398E003 Renton ES 16 2022-06-01 FR 015 Kirkland | Tacoma | Mount Vernon 425-827-7701| www.aesgeo.com Date Mailed: Principal / PM: This document is considered a DRAFT until signed or initialed by an AESI Principal or Project Manager Page 1 of 2 v.7.20 FIELD REPORT Date Project Name Project No. Report No. 06/01/2022 Renton Elementary School 16 20180398E003 015 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. Mostly cloudy, 60’s THE FOLLOWING WAS NOTED: Associated Earth Sciences Inc. (AESI) was on site, as requested, to observe building footing subgrade preparation. Upon arrival, we met with representatives from Cornerstone and Continental Dirt Contractors (CDC). Building Footing Subgrade Preparation: Upon arrival, CDC was preparing footings in Area A and B for the future school building. At planned footing subgrade elevation, a moist to very moist, gray to orange, sand with silt (native till) was observed. Using a ½-inch diameter steel T-probe, AESI probed footing subgrades to depths of less than 2 inches and noted the material appeared firm and unyielding underfoot. The contractor then placed 4-inches of 2.5-inch minus crushed rock along the bottom of excavations to protect the subgrade. The material was compacted using a vibratory sled compactor. All footings observed today appear suitable for the design loads. See Figure 1 for locations. Building Pad Subgrade Preparation: While onsite today, CDC was preparing the building pad subgrade in Area D. The contractor was excavating to 4-6-inches below bottom of slab section and placing 4-6-inches of 2.5-inch minus crushed rock material up to planned subgrade elevation. The area consisted of a moist, gray to orange-gray, sand with silt and trace gravels (native till). Using a ½-inch diameter steel T-probe, AESI probed the exposed subgrade to depths of less than 2 inches and noted the material appeared firm and unyielding under equipment. See Figure 2 for locations. Building Slab Subgrade Over Excavation: AESI was onsite on May 17, 2022 (See FR007) to observe building slab preparation in Area A. While onsite on this day, AESI observed the contractor remove approximately 300 cubic yards (bank yardage) of soft soils. Date Project Name Project No. Report No. 06/01/2022 Renton ES 16 20180398E003 015 Page 2 of 2 FIELD REPORT Figure 1: Plan sheets S2.01 (Area A, left) and S2.02 (Area B, right). Footing subgrades observed today highlighted in green. Subgrades observed previously highlighted in blue. Figure 2: Green highlight indicates approximate location of building slab subgrade preparation observed today.