1001 N BROADWAY Geotech Report 2018-01-02 MF Import

J-736 Page 8 and gravel material containing less than 5 percent fines (soil material passing the No. 200 mesh sieve) and contain no mat- erial greater than 6 inches in diameter. This material may be placed by end dumping, spread with a bulldozer, and then rolled using a loaded dump truck, vibratory compactor, or other suit- able equipment, until a uniform, relatively non-yielding surface is achieved.� We anticipaCe that about 18 to 24 inches of granular material would be required to achieve a suitable working surface. However, any spongy areas should continue to be filled or further•overexcavated and backfilled until a suit- able working surface is obtained. In any case, the granular work- ing surface should be compacted by equipment making a minimum of 4.complete passes ovez the entire working base. All other areas to receive structural fill support slabs on grade or shallow foundation should be prerolled to a non- yielding compact surface. We reco�end that prerolling be. accomplished with a relatively heavy vibratory rollex such that the upper 12 inchea of exposed,.non-organic soils are compacted to at least 95 percent and 92 percent of the modified Proctor maximum dry density (ASTM D1557-70) beneath building areas and paved areas, respectively. To achieve this degree of compaction it may be necessary to scarify the upper in-situ soils and ad- just these materials for proper moisture contcnt as discussed �+�. the following section "Structural Fill". Structural Fill All fill within the building area, beneatih paved surfaces, be- � low slabs on grade,and.backfill for overexcavations should be _�. � placed as structural fill. Prior to placement of structural fill the surfaces to receive fill should be prepared as re- coffinended in the previous section. � � �