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HomeMy WebLinkAboutMiscellaneous Field Test & Inspection Report 2000-7-13 .; RiVtlt Valle~ Builders Inc 541 367 e. 1638 p.2 Rug '14 00 02: OOp ..- .l ft ~ ;ZIn/onnation ~..,. .To Build On 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 ) 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. ~ '&' ~\GINc.r- '% \ ';.; <c:; ~'9.'t- 1<>: 192C6PE ~\ \ ! '-J~1P \ '1'.OREGON :'\ ) . . :'(Y15,"'~ ~\i.~ ~~ "-,. EX?~AES: 8/30 D! 1 Brian Currier, E.I.T. Staff Engineer Troy Hull, P.E. Projecl Engineer 1