5016 HARBOR LN 2016-01-01 MF Import

A L1 1 � � � � IL,aJ � �M M � � � � DAVID L. NELSON AND ASSOCIATES, INC. Consulting Engineering Geology October 27, 1988 Project No. 13288 Page 7 structural fill is recommended. This would consist of stripping of the surficial fill and topsoils (about 2 to 5 feet thick) down to the suitable native soils, and replacement up to desired finish subgrade with structural fill. Pavement could then De placed upon the prepared area using conventional crushed rock base and asphaltic surfacing. Alternatively. the existing fitl could De compacted as we11 as possible at proposed subgrade elevation, and the conventional crushed rock base and asphaltic surfacing placed. If this alternative is utilized, future repair to the pavement surface may be necessary, due to long term, sporadic consolidation and settlement expected within the fill materials. Structural fill placed within the site area should be placed upon a prepared subgrade. The subgrade should be free of all organic, loose and wet soils, and in a dense unyielding state prior to olacement of the structural fill. Ne suggest the structural fill consist of granular, pit-run type soils, generally approved for use in the area. The structural fi11 should be placed in 6 to 8 inch lifts, and compacted to 95% of ASTM D-1557, modified proctor within structure areas, and to 90% of ASTM 0-1557. modified proctor within pavement areas. Al1 structural fill should be placed at or within 2� of o�timum moisture content. Additional Notes Earthwork development within the site area, including excavations, strurtural filling, foundation placement and drainage should be observed and approved by the geotechnical consultant. Although we do expect site soil types, conditions and distributions to reflect our findings, some variations could occur. Should conditions other than those discussed herein be encountered, the geotechnical consultant should De notified for review and comment. Additional or alternative recomnendations may be required.