Report ,
GeoPacitic
Engineering,Inc.
Real-World Geotechnical Solutions
Investigation•Design•Construction Support
December 27, 2012
GeoPacific Project No. 11-2373
Attention: Alan Goffmore
Pacific Evergreen Homes
7410 SW Oleson Road#133
Portland, OR 97223
Fax 503-208-7127
AlanaPacificEveroreen Homes.com
FOUNDATION EXCAVATION REVIEW n1C-r 7/ _ "EB'
LOT 22—BRITTANY MEADOWS
7894 SW HANSEN LANE
CITY OF TIGARD, OREGON
GeoPacific Engineering Inc. visited the site yesterday to review the single family home foundation layout on
Lot 22. We understand that the proposed building is a two-story home. In our opinion, the observed subgrade
is generally adequate for support to an allowable bearing pressure of 1,500 psf. The expected maximum
anticipated total and differential footing movements (generally from soil expansion and/or settlement) are 1
inch and 34 inch, respectively, over a span of 20 feet.
At the time of our site visit, the excavation was complete and most vertical cuts covered with plastic sheeting.
The excavation consisted of predominantly medium dense native sand soil that could be probed about 2 to 4
inches with medium to heavy pressure using a steel"T"bar probe. These soils are considered adequate to
support the planned foundation loads. Footing-to-slope setbacks are not an issue and foundation embedment
depths appeared adequate.
Due to relatively sandy soils encountered throughout the site, erosion is the biggest concern. Foundations
should also incorporate appropriate drainage measures in accordance with the International Residential Code.
Adequate drainage is not something that geotechnical consultants can verify;the purpose of our visit is for
observations of foundation bearing conditions only.
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. Within the limitations of scope, schedule and budget,
GeoPacific attempted to execute these services in accordance with generally accepted professional principles
and practices in the fields of geotechnical engineering and engineering geology at the time the report was •
prepared. No warranty, express or implied, is made. If you have any questions, please call.
Sincerely, :S•O PROFess
GeoPacific Engineering, Inc. �`� tN Lc a,L,
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James D. Imbrie, G.E. j ✓4,14' •M'�°�
Geotechnical Engineer �"
14835 SW 72nd Avenue EXPIRES:Obf j Tel(503) 598-8445
Portland, Oregon 97224 Fax(503)941-9281
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