HomeMy WebLinkAboutMiscellaneous Field Test & Inspection Report 2000-7-13
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RiVtlt Valle~
Builders Inc
541 367
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1638
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Engineering. Consulting . 7Bstlng
July 13,2000
Mr. Greg Larkin
River Valley Builders, Ino.
P.O. Box 204)
Corvallis, Oregon 97339
Subject:
Pad Completion Letter
Ambleside Meadows,-Lot # 86
Springfield, Oregon
PSI File No. 722-00154 31./'50 Flrl--CON
Dear Mr. Larkin;
Professional Service Industries, Inc. (PSI) has completed a house pad subgrade evaluation at the
above referenced lot. The foundation subgrade soils within the house pad area were visually
olassified as brown, silty clay. The house pad area was probed with a V, inch diameter soil probe
and appeared firm at the time of our site visit. Moisture oontenl tesls were taken al various
locations Ihroughout the house pad. The moisture contents tesls ranged from 29 to 31 percent.
Based on previous testing performed on the soil type, the moisture oontent test taken is aoceptable
for Ihis type of potentially expansive soil.
The contractor Ihen placed approximalely 12 inches of 3 inoh minus agg'egate fill wilhin the
north side of Ihe lot and 4 inches of crushed aggregate, granular fill over the house pad area to
aohieve final grade and oompaoted Ihe malerial. A proofroll of the oompacted granular fill was
performed using a loaded dump Iruck. No defleclion was observed wilhin the house pad area at
the time of our sile visit. The crushed aggregate, granular fill visually appeared to be well
compacted at the time of Ollr site visit.
Additionally, we recommend that finished grade adjacent 10 the exterior portion of the foolings
and slabs be al leasl 2 feel higher than the expansive bearing soils. 111is is to provide a buffer
from environmental changes that could cause the expansive soils to dry and hydrate. It will be
imperalive that the 2-foot buffer of landscape soil be oompacted 10 a firm condition 10 reduce the
infiltration of water al the surfaoe.
During foundalion construotion, waler should nol be allowed to collect in foundation excavations,
on floor slab areas, or on prepared sub grades of Ihe construotioll area either during or after
construction. Underoul or excavaled areas should be sloped toward one oorner to facilitate
removal of any collecled rainwater, groundwaler, or surface runoff.
ProfessIonal Service Industries, Inc.. 104DA Shelley Sl.. Springlield. OR 97477. Phone 541/746-9649. Fax 541/746-7163
Rug 14 00 02:00p
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RiV~ Val1e~ Builders Inc
541 367
.
1638
p.3
./"
Amblesidc Meadows
Lo, #86
July 13.2000
Page 2 of2
Positive site drainage and foundation drains should be provided to reduce infiltration of surface
water around the perimeter of the house and beneath the floor slabs. The permanent grades
should be significantly sloped away from the house building areas and surface drainage should be
collected and discharged such that water is not permitted to infiltrate the backfill and floor slab
areas of the residenoe.
All crawl spaces should be provided with a low-point crawl space drain oonnected 10 the stonn
sewer or approved disposal syslem (outlet). All areas of the orawl space should be graded to
drain to the low-poinl drain. All orawl spaoe areas should be covered with a visqueen moisture
barrier. The low-point drain should be lower than the elevalion of the visqueen moisture barrier.
Based upon our observations, the house pad subgrade has been constructed in general accordance
with induslry standards for lightly loaded (1,500 pounds per square fool or less) foundation loads
typical for this type of constr.uotioQ.. .If you have any questions regarding Ihis report, please feel.
free to conlact us at 746-9649.
Respectfully Submitted,
PROFESSIONAL SERVICE INDUSTRIES, INC.
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Brian Currier, E.I.T.
Staff Engineer
Troy Hull, P.E.
Projecl Engineer
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