Loading...
HomeMy WebLinkAboutMiscellaneous Field Test & Inspection Report 2000-6-16 Jun 26 00 02:44p Ri1t Valle~ Builders Inc , .. 06/26/00 09:39 FAX 5417467 P5I SPRINGFIELD )' . 541 367 1638 . p.6 ~006 I.. ~;llnfonnation ",..,. .To Build On E IJ".',,'IfI'.~."_""J,,~r && '?/9" "5. J .,' / . t}tP~73 3l.flf ( ~ June 16,2000 Mr. Greg Larlcin River Valley Builders, Inc. P.O. Box 2041 Corvallis, Oregon 97339 Subject: pad CompletioD Letter Amb.1eslde Meadows, Lot 1# 101 Springfield, Oregon PSI File No. nZ-tlOI54 Deor Me. Larkin: Professional Service Industries, Inc. (PSI) has completed a house pad subgrade evaluation at the above referenced lot. The foundation sub grade soils within the south \/, of the house pad area were visually classified as brown, silty clay, while the subgradc soils within north \l, of the house pad area wc:rc classified as grey clay. The house pad area was probed with a ~ inch diameter soil probe and appeored finn at the time of our site visit. Moisture content tests were taken at various locations throughout the house pad. .The moisture cootents tests ranged from 29 to 34 pcn;cnt. Based 00 previous testing performed on the soil type, the moisture content test taken is acceptable for this type of potentially expansive soil. The contractor has graded the house pad subgrade such that it slopes downward from south to north at approximately 2 percent. The contractor then placed approximately 12 inches of 5 inch minus aggregate fill within the north side of the lot and 4 inches of crushed aggregate, granular fill over the house pad area to achieve final grade and compacted the material. A proofroU of the compacted granular fill was performed u.mg a load!"f dump truck. No dcflection was observed within the house pad arca at the time of our site visit. TIle crushed aggregate,' granular fill visually appeared to be well compacted at the time of our site visit. Additionally, we recommend that finished grade adjacent.to the exterior portion of the footings and slabs be at least 2 feet higher than the expansive bearing soils. This is to provide a buffer from environmental changes that could cause the expansive soils to dry and hydrate. It will be imperative that the 2.foot buffer of landscape soil be compacted to a firm coodition to reduce thc infiltration of water at the surface. During foundation construction, walcr should oot be allowed to collect io foundation excavations, on floor slab areas, or on prepared subgrades of the coostruction orea either during or after construction. Undercut or excavated areas should be sloped toward one comer to facilitate removal of any collected rainwater~ groundw.ater, or surface runoff. Professional Servlce lndumrIBS,lnc.. 1040A S"elley Sl.. Sprlngfiold. OR 97417. Phone 541f74~&49. Fall 5411746.7163 Jun 26 00 02:44p - 06/26/00 09:40 FAX RivA 5417467. Valle~ Builders Inc PSI SPRINGFIELD 541 367 . 1638 p.7 ~007 ,I Amblesidc Meadows Lot #101 lune 16. 2000 Page 20f2 Positive site drainage and foundmion drains should be provided to reduce inf1l1ration of surface water around, the perimeter of the house and beneath the floor slabs. The pcnnanent grades should be significantly sloped away from the house building areas and surface drainage should be coUccted and diseharged such that water is not permitted to infiltrate the backfill and floor slab areas of the residence. AU era";) spaces should be provided with a low-point crawl space drain connected to the storm sewer or approved disposal system (outlet). All areas of the crawl space should be graded to drain to the low-point drain. All crawl space areas should be covered with a visqueen moisture barrier. The low-point drain should be lower than the elevation of the visquecn moisture barrier. Based upon our observations, the honse pad subgrade has been. constructed in gcoeral accordance with industry standards for lightly loaded (1,500 pounds.per square foetor less) foundation loads typical for this type of construction. If you have any questions regarding this report, please feel free to contact us at 746-9649. Respectfully Submitted, PROFESSIONAL SERVICE INDUSTRIES, INC. ~~ EXPIRES: 6/30 0 , Brian Currier. E.l.T. Staff Engineer Troy Hull, P.E. Project Engineer