Premier Field Development, Inc. 5/9/2016

-10- that such fills be removed and replaced with properly compacted fill that was free of organics, in order to avoid potential settlement. How- ever, considering the relatively large quantities of existing fill that would need to be removed, and possibly replaced with imported material , we discuss both the option of removing existing fill , and of leaving it in place. Treatment of existing soils in areas of proposed structures is discussed on a case by case basis. I Inorganic on-site soils are suitable for reuse as fill . However, the soils are highly moisture sensitive, and will require careful moisture control , as well as dry weather construction. Site Preparation and Grading Logging, Grubbing, and Stripping: Areas that are presently wooded or covered with brush should be logged and grubbed. Stumps should be re- moved by overturning in order to remove the major portion of roots. Forest duff, topsoil , and rootmat should be stripped and wasted or stockpiled for later use. Areas to Receive Fill : Where native soil (till) is exposed in areas that are to receive fill , the exposed surface should be compacted in place to at least 90 percent of the maximum dry density (in this report, the maximum dry density refers to that density determined by the ASTM D-1557 Compaction Test Procedure) . This recommendation applies to both Hall and Kasch Parks. Where existing fill is exposed by stripping, it may be left in place at some locations, provided some future maintenance due to settlement is acceptable. At Hall Park, little if any new fill is planned. Consider- ing that the existing fill has reportedly been in place for at least two years, it is our opinion that settlement due to consolidation is most likely essentially complete, and that subsequent settlement will most likely be caused primarily by decomposition of organic materials. The magnitude and rate of such settlement is difficult to estimate. The