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Report IMIRD 9750 SW Nimbus Avenue Beaverton, OR 97008-7172 p 503-641-3478 fl 503-644-8034 RPCAVEP May 16, 2019 5846-A C.O.SUMMARY LTR OCT 2 2 2019 The Spanos Corporation CITY OF IIGARD 10220 SW Greenburg Road BUILDING1�j1C�4'� s Building 2, Suite 530 Portland, OR 97223 Attention: Jared Mauch SUBJECT: Summary of Construction Observation Services Oak Street Apartments 8950 SW Oak Street Tigard, Oregon City of Tigard Permit Number: FPS-2017-00124-125 GRI provided geotechnical engineering services during the construction of the new Oak Street Apartments located at 8950 SW Oak Street in Tigard, Oregon. The general contractor for the project is The Spanos Corporation and the structural engineer is Miller Consulting Engineers, Inc (Miller). GRI personnel visited the site between September 27, 2017, and May 2, 2019, to observe site stripping; placement of structural fill; installation of auger cast-in-place piles; pile cap and shallow foundation subgrade; slab-on-grade subgrade; slab-on-grade base rock; utility trench backfill; retaining wall subgrade; retaining wall backfill; pavement subgrade; and pavement base rock. Our observations at the site were documented in site visit reports distributed to you and Miller. In our opinion, the work observed by GRI was completed in substantial conformance with the project plans and specifications and our recommendations. Please contact the undersigned if you have any questions or if we can be of further assistance. Submitted for GRI, PR��F� c'�•�IG{NFv9 �o ;ø1 Renews 12-2020 Michael W. Reed, PE, GE Principal This document has been submitted electronically. GEOTECHNICAL ■ PAVEMENT ■ GEOLOGICAL ■ENVIRONMENTAL Since 1984