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Report / a � GeoP If Engineenng; Inc. (k!' 2 °°5 Real -World Geotechnical Solutions Investigation • Design • Construction Support March 22, 2005 Project No. 03 -8183 • Attention; Andy Venture Properties, Inc. 4230 Galewood Street, Suite 100 Lake Oswego, Oregon 97035 Fax No. 503 - 670 -9099 RE: SOIL ENGINEER'S REVIEW OF FOUNDATION EXCAVATION SUBGRADE LOTS 26, 30, 49 SUMMIT RIDGE � / (P TIGARD, OREGON / Sa a-(e , , - References: . / S ' • • • 1. GeoPacific Engineering Inc., Geotechnical Investigation, Summit Ride Development, Tigard, Oregon, dated May 12, 2003. 2. GeoPacific Engineering Inc., Soil and Wall Engineer's Summary at Conclusion of Earthwork, Summit Ridge Development — Phase 1, Tigard, Oregon, Revised January 21, 2004 (should state 2005). • GeoPacific Engineer, Jim Imbrie, visited the site yesterday to review the foundation excavation subgrades on the above - referenced lots. The observed soils are stiff native soils or compact engineered fill consisting of clayey silt, with rocks. Some mucking may be required if the subgrade is left exposed to wet weather for a long duration, however the current subgrade is.fairly dry. The foundation subgrades are appropriately setback from the rear yard rockery retaining wall. - Based or our Obs it i9 our nninion that the current foundation subarade is adequate for spread foundation support to a maximum allowable bearing pressure of 1,500 psf. Our work scope pertains to a geotechnical engineer's foundation excavation review only and the conditions existing and exposed at the time of our site visit. No deck footing, patio, or other appurtenant structure subgrades were observed. Our work was performed to the current local standards of practice. No other warranty is herein expressed or implied. If you have any questions, please call. Sincerely, GeoPacific Engineering, Inc. • r°., 7 y 14743 ( James D. Imbrie, P.E., C.E.G. f OREGON O . J Geotechnical Engineer �. 4"/ f S O.t v •