1620 ORCA VIEW LN 2016-01-01 MF Import

i D...ID L.NELSON AND ASSOCIATES,INC. � Comulting Engincciing Gculagy ,lune 1, 198° Project No. 7C89 � Page 3 j southerly sioDe, are Cr000sed. Ne are of the opinion that if these building I setbacks are used, r?sidente foundation Dlacement should be conducted well �� into the dense native soils, to achieve greater "net" buildtna setbacks fran ��, the slope areas. we understand that a daylight basement is desired within the area, where areater =xczvation is p;oposed along the easterly side, becoming somewhat less along the south and west sides. Generally, development wtthin this area should lnclude foundatlon placement within the compact native sofls, limitations of earthwork within the butlding setback and slope areas, drainage controls anG proDer vegetation thinning. Earthwork Considerat(ons Excavation for the resfdence structure and yard areas should be limtted to the development areas located back from the established setback from the top-of- sloDe. All excavation materials should be removed from the area, or stockvfled for use as backfill outside of the setback area. Thts includes � I "temvorary" excavatton matertals from foundation excavation. Absolutely no filling should be performed withfn the setback or sloDe areas. Foundations In aeneral, residenCe foundations should be placed withln the [cmpact native sofls. AII footinos should extend through surficial artiftcial f111 or unsuitable surface sotls, and plated a minirum of 5 feet into the dense nat[ve soils. This should achieve nominal (net) buildings setbacks of about 23 feet within the northerly and easterly areas and about 10 feet within the southerly � area (assuming a 1H:1U sloDe). Foundatton placement and slab-on-grade areas should be performed as shown on the enclosed Subdrain 8 Backfill Schemes, sheet S-1 and S-2. Drainage All surface waters should be directed away from the setback and slope areas. � We suggest the use of foundation and roof drain systems, independently directed aM•ay from the structure area, and into a main drafnage system. Thts drainage system should be directed into the storm drainage system off site, or � �