1130 RAINIER AVE WHOLE SITE DOCUMENTS 2016-01-01 MF Import

� [v?reft Housing Aufhority i�1ay 16, 2012 � JN 12080 Page 2 drilling proc�:s, logged the test borings, and obtained representative samples of lhe soil ercounterec. The Test Boring Logs are attached as Plates 3 lhrough 8. Soil Corrditions The upper soil revealed in the test borings was loose fill soil Ihat ranged from a few feet uo to about 8.5 feer. In general, medium-dense silty sand/sandy silt was revealed belo�v the fill in tne t:vo soutf�,�estern test bormgs (1 and 2) and the norlheastem tesl boring (4). Very dense, graveily silty sand was revealed below these soils at deplhs (beloe� ground suriace) in !hese lhree t�,t borings o` approxima!ely 5 to 10 feel. In Ine Ihree southeastern lest borinys, soft, organic pcat soil �vas revealed below the peal do•sm to approximately 8 to 10 `a�1 beb��v the ground surface. Thr Neat is underlain by sofUloose silt and clay soils. At d�pths cF aperoximately 11 to 16 ieet in these test holes, the very dense, gravelly silly sznd was revealed. No obstructions svere revealed by our explorations. However, debris, buried utilities, and old foundation and slab elements are commonly encountered on sites that have had previous development. Groundwater Conditions No groundwater seepage was observed in Ihe test borings; ho�vever, they were left open for only a short time period. Therefore, the lack of seepage may not indicate the static groundwater level. Groundwater levels encountered during drilling can be deceptive, because seepage into the boring can be blocked or slowed by lhe auger itself. It should be noted Ihat groundwater levels vary seasonally with rainfall and o�her factors. It is p�ssibie that some ground�valer could be found beriveen the looser or organic, near- surface so'I and the underlying denser soil. The stratificalion lines on the logs represent the approximate boundaries between soil types al the exploration locations. The aclual lransition behveen soil types may be gradual, and subsurface conditions can vary belween exploralion locations. The logs provide speci(ic subsurface iniormation only at the localions tested. �Vhere a lransition in soil lype occurred belwean samples m the borings, the de,�fh of the transition was interpreted. The relative densities and moisture descriptions indicated on lhe test boring logs are interpretive descriptions based on lhe conditions observed during drilling. CONCLUSIONS AND RECOMMENDATIONS GENERAL THIS SECTION CONTAINS A SUlv1M�RY OF OUR STUDY AND FINDINGS FOR THE PURPOSES OF A GENERAL OVERVIEW ONLY. �L10RE SPEClFIC RE-COMhIENDATIONS AND CONCLUSIONS ARE CONTAINED IN THE REMAINDER OF THIS REPORT. ANY PARTY RELYING ON THIS REPORT SHOULD READ THE ENTIRE DOCUfvIENT. The test borings conducted for this study encountered approximately 3 to 16 feet of loose fill, native soils, and/or organic peat overlying competent mediwn-dense to very dense native soils. Little excavation is planned for this project because the proposed finish floors oF the buildings are at or c=orecn cor�su�r,�Nrs, iric