4719 BELVEDERE AVE 2016-01-01 MF Import

June 28, 206 David und Judy King L&A ]ob No. 6A076 Page 10 be nllowed to ilow uncontrollcd ovcr the top of cut or fill slopes. Permanent cut slopes or fill embankments should be seeded and vcgctated as soon as possible for erosion protection and long-tcrtn stability, and should be covercd with plastic shects, as required, to protect ngainst erosion until thc vegetation is fully estnblished. SIIORINC WALLS If there is insutTicicnt space for opcn cut for lhe building footprint excavation, shoring walls should he installed to support vertical cut for thc excavation of the below-gr-.ule porlion of Uie proposed new residence. We :vill be glad to provide rccommendations for shoring wall design when the architectural dcsign plans arc finalizcd and the excavation rcquiremcnts can be accuratcly detincd. S7'RUCTURAL FII.L Structur�l fill is thc lill that supporls structural or traftic load. Stnactural fill should consist of cican soils with �vlicics not largcr than four inchcs and should bc free of organic and oUier Jelcterious subst:uiccs. Structurai fill should have a moisture content within one perccnt of its optimum moislurc content at Uie time of placemenL T'he optimum moisture content is the water content in the soil that cnable the soil to be compactcd to the highest dry dcnsity for a givcn compaction cfforl. 'l hc on-sitc cican lisperancc Sand soils may bc uscd as str�cturnl fill if thcir moisturc contcnt oan be cantrol to within one percent of their optimum moisture content. The c,n-site Whidbey forniation soils contain too much fincs and may bc in Inrge lumps, nnd should not be used as strur.tural fill. Importcd matcrial to bc uscd as swctural fill should bc clenn, frcc-draining, grmular soils containing no morc than 5 percent by weight 6ner tlian the No. 200 sicve based on the Gaction of the matcrial passing No. 4 sicve, and should have individual particles not greater LIU & A,SSQCIATES, INC.