Premier Field Development, Inc. 5/9/2016

-7- These units are used in the following text and on the exploration logs to simplify descriptions of subsurface conditions. Generalized subsur- face conditions are presented below; more detailed descriptions are presented on the exploration logs. Walter E. Hall Park At Hall Park, the uppermost soil unit encountered in eight of the explo- rations consisted of topsoil and rootmat or forest duff. This unit ranged from 0.3 to 1 .0 feet thick, and had an average thickness of about 0.5 feet. Due to its high organic content, this material is not con- sidered suitable to remain in place where it would support new fill , structures, or pavement. • In 11 of the 14 explorations, the underlying unit consisted of fill that ranged from about 2-1/2 to 9 feet deep. Fills generally appeared to be uncontrolled and uncompacted, and included till , topsoil , natural organ- ic debris, and asphalt. Test pits TP-102 and TP-113 were intended to be located in the areas of the filled-in ponds (as estimated by City per- sonnel ) , and therefore fill was expected. Similarly, TP-112 was located on a man-made knoll , and fill was expected. At other locations, fill was not expected, and its origin is not known. The relatively large depths of fill are significant in that the fill often contained organic materials that can be expected to decay with time, and the fill appeared not to be compacted. Either of these conditions could be expected to result in future settlement. Below the fill , native soils typically were till in various stages of weathering, or alluvium. These soils are considered suitable to remain in place; however, where these soils are exposed and found to be in a loose condition, recompaction in place is recommended. It is noted that although no boulders were encountered in our explora- tions, glacial till can contain large boulders or "glacial erratics" . Several of these boulders were observed at the fill stockpile at Kasch Park.