Premier Field Development, Inc. 5/9/2016

-9- Exceptions to this were at TP-212 and TP-215, where no fill was encoun- tered, and the topsoil or duff was directly underlain by native soil . In our explorations, the duff or topsoil ranged from 0.3 to 1.0 feet thick, with an average thickness of 0.8 feet. Fill , where encountered, extended to depths of 2 to 8 feet. The duff and topsoil are not considered suitable to be used as fill , nor to remain in place in areas to receive new fill . The native soils en- countered at depth can remain in place, but may require compaction if they are loose or become disturbed. The fill was of variable consis- tency and content. In places it was medium dense and relatively clean of organics, while in other places it was loose and/or contained signif- icant quantities of organics. Recommendations for treatment of in place fill are presented below in the section entitled "DISCUSSION AND RECOM- MENDATIONS". Light to heavy seepage was noted in seven of the nine test pits exca- vated at the north end of Kasch Park. It is our opinion that seepage reflected perched pockets of water, rather than static groundwater. This water is not expected to affect the permanent design of north-end improvements; however, it will likely affect construction activities. DISCUSSION AND RECOMMENDATIONS General In areas of proposed playfields, structures, and paved parking, natural organic soils (forest duff, rootmat, topsoil) are not considered suit- able to remain in place, and should be stripped. Natural tills (highly weathered to unweathered) can remain in place, but may require compac- tion in place if they are naturally loose, or if they are disturbed by construction activities. Existing man-made fills were often observed to be loose and to contain significant quantities of organics, and thus could be expected to result in settlement of overlying structures, pave- ments, fills, or playing surfaces. Normally, it would be recommended