1620 ORCA VIEW LN 2016-01-01 MF Import

. �..VID L.NELSON AND ASSOCIATES,INC. �� Consulling Engincering Grulogy June 1, 1989 Project No. 7089 Page 4 into a tight-li�e drain which outfalls into an aDProved outfall area. Surface grading should be performed so that all surface waters are directed away from the setback and structure areas, and directed into the main drafnage system. Vegetation Thfnning and Londscapina We understand that some vecetation thinning may be desired within the setback area or steep sloDe area. If performed, thinning should be accomplished so that disturbance to the ground is minimized. Ttiinned or pruned trees should be cut so that the root mass is left in place, and the cut materials removed from the site. Any exDosed ground areas created by thts Drocess should be re- vegetated as soon as possible to reduce potential erosion. Landscaping Oroposed within the setback area should not be performed through filling of the area, or disturban:.z to the sloDe area. Impermeable areas, such as concrete patfos are not recommended aithin the setbatk area, unless adequately dralned away from the sloDe area. Any exposed ground areas created during the earthwork and development phase should be protected from erosfon. Some disturbance to the slope area may occur wlth time. He suggest monitortng of the setback and slope areas be on-going. Any noticeable failure, erosion, tension cracking or other destablization of the area should be brought to the attention of the geotechnital consultant. Additional or alternative recommendations for stabilization of these areas may be required. Thank you for the opDortunity to be of service. If you have zny questions, feel free to call on us at any time. Sincerely, DAVID NEL ON 8 ASSOCIATES, INC. �/.�fe��x2'"' -- David L. Nelson, PG Professional Engineering Geologist