Report 04103!2005 17 :32 , 5035 :380705 GEOPACIFIC ENG INC , PAGE 01
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GeoP , ' fic
.'tifOlneer��g Inc ".
Real -World Geotechnical Solutions
Investigation . Design a Construction Support
April 8. 2005
Project No. 03 -8183
Attentinn; Andy
Venture Properties, Inc.
4230 Galewood Street, Suite 100
Lake Oswego, Oregon 97U4b
Fax No, 503- 670 -9099
RE: SOIL ENGINEER'S REVIEW OF FOUNDATION EXCAVATION SUBGRADE
LOTS 55, 88, AND 109 SUMMIT RIDGE
TIGARD, OREGON
References:
1. GeoPaciric Engineering Inc,, Geotechnical Investigation, Summit Ridge Development, Turd, Oregon, dated May 12,
2003,
2. GeoPacift 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 2305).
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GeoPacific Engineer, Jim lmbrie, visited the sit today to review the foundation excavation subgrades on the
above-referenced lots. The observed soils on Lot 55 are medium stiff to stiff native soils and on Lots 88 and
tins hack of Lot 55 are compact engineered fill consisting of clayey silt, with racks. Soule mucking may be
required if the subgrade is left exposed to wet weather for a long duration, however the current subgrade Is
only damp. The foundation subgrades are appropriately setback from the rear yard rockery retaining walls.
Based on our observations, it is our opinion that the current foundation subgrades are 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, peso, or other appurtenant structure
subgrades were observed. Our work was performed to the current local standards of practise, No other
warranty is herein expressed or implied. If you have any questions, please call.
Sincerely,
GeoPecific Engineering, Inc.
PROPe
G E,s N F 3�
147
James D. Imbrie, P.E„ C.E.G. OREGON
Geotechnical Engineer w�N g `�