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� <br /> ` against walis, and u ward slo in o <br /> P p g gr und surfaces behind walis. ln these cases higher lat�rai <br /> � earth pressures and parameters must be considered in design of walis. <br /> Granular backfill should be placed against retaining and foundation walls as a triangular prism with' <br /> � a 1:2 (horizontal: vertical) slope or flatter as shown in Appendix C (Foundation Wall Backfill and <br /> Drainage). Backfill must be free-draining granular material with less than 5 percent fines passing <br /> #200 sieve. This minimizes long term soil movement due to soil creep and freeze-thaw action. <br /> ( Backfill must be capped with compacted cohesive bac�ll as shown in Appendix C to minimize <br /> surface water infiltration into backfill. Backfill must meet recommendations in the EXCAVATION <br /> ( AND EARTHWORK section of this report. The area between this triangular prism and sloping <br /> excavated surtace can be backfilled with either cohesive or granular soil meeting structural fill <br /> recommendations in this report. Granular backfill must be free-draining and well-drained � <br /> ( permanenUy into perimeter wall drain lines. It must be installed according to recommendations in <br /> the WATERPROOFING section of this report. <br /> , CHANGED CONDITION AND OBSERVATION <br /> If any changes in the nature, design, or locations of structures are planned, the analyses, <br /> conclusions, and recommendations in this report are not valid. However, the analyses, <br /> conclusions, and recommendations in this report can be modified and verified in writing if we are <br /> provided an opportunity to review these changes. Analyses, recommendations, and conclusions in <br /> this report are based, in part, on subsurtace conditions encountered in the exploratory soil borings. <br /> The nature and extent of variation of subsurtace conditions across the site may not become <br /> evident until the construction stage of the project. If variation in subsurface conditions becomes <br /> evident, our analyses, recommendations, and conclusions in this report must be reviewed and re- <br /> evaluated. _ <br /> The Engineer must be provided the opportunity to review designs and specifications for the <br /> construction project gene�ally. By making this review, the recommendations in this report can be <br /> prope�ly interpreted and implemented with regard to the project designs and speci�cations. <br /> Finally, we recommend retaining the Engineer to provide continuous engineering service during the <br /> construction stage of the project, with emphasis on excavation, earthworic, and foundation <br /> constnaction. This construction stage on-site presence by the Engineer will be to observe <br /> compliance with design concepts, specifications, and recommendations in this report. This <br /> presence also provides an opportuniiy to modify these design concepts, specifications, and <br /> recommendations in the event subsurface conditions differ from the anticipated conditions. <br /> Allied Projed 05039 �7 July 31, 2005 <br />