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

.� ..�.r�..w. J-736 page 10 Prerequisite to fill control is the determi.nation of compaction ' characteristics fro� representative samples. Since exc-3vation will result in mixing of the various soils, we recommeiid that Hart-Crowser and Associates sample the excavated soils or borrow seurces as soon as work begins to determine the com- paction characteristics of the fill materials. This wor.k could be accomplished in the field by our firm so that the resutls could be covanunicated to the contractor on a timely tasis. - -,�.;r Structural fill should be placed in lifts not exceeding 10 inches in luose thickness and compacseofasoilmandtrocksontent within ± 2 percent of optimum. L�P larger than 5 inches in diameter should be excluded from the fill material. � Individual li£ts should be compacted using appropriate compaction equipment mal:ing at least four complete passes over the entire . surface of each lift and continuing as necessary to achieve at least 95 percent and 92 percent of the modified Proctor maximum dry density (ASTM D1557-70) beneath the building areas and paved areas, respectively. The various types of soil avai-l- able for use as structural fill may require differing compaction equipment for best results in placement. 'The clayey SILTS and SILTS should be compacted using kneading-tYPe equipment such as heavy rubber-tired or sheepsfdot roller. The necessary types of equipment should be available for use. • Should the exposed fill become wet of optimum during intermittent wet weather, the surface should be scarifyed and allowed to dry until the water content is again within ± 2 percent of optimum. Structural fill should extend at least 5 fthen downdandeout tos of the structure and/or all traffic waYs� the existing surface. We believe that a final slope of 2H : 1V