7007 SEAWAY BLVD 2016-01-01 MF Import

Mr.Bill Way July 25, 1996 Based on rcview of the preliminary grading plan and the sketch showing revised building locations, we do not expect conswction of the facilitir,wiil be adveruly affected by the layer of organic sail found in the test pits. The organic layer is roletively thin and occurs at a depth sufficient rnor.gh to not be unduly intluenced from loads imposed by the rclatively light park suuctures. A fir.al assessment of the possible impacts to the(ayer should be made once final plans are developed. Site Preoantion snd Gradina Before starting grading operations, vegetation and/or organic soil should be stripped to expose suitable, celatively organic-frce soil. Stripped vegetation and organics found within the fill should fx rcmoved from the site or used on-site in non-structural areas. Following stripping, we recommend verifying tt�e suiability of the exposed subgrade in parl:ing, driveway, and building areas by proofrolling with luavy construction equipment. If excessively yielding azeas are observed and cannot be stabilized in place by compaction,wc recommend they be cut to a tirm subecade and grade restored with structural fill. In pavement areas, if the depth of excavation to rcmove unstable soils is cxcessive, use of geotextile fabric such as Mirafi SOOX or equivalent in conjunction with structural fill can be considered in order to limit the depth of removal. In general, a minimum of l8 inches of a clean, granulaz stiuctural fill over du geotextile fabric should atablish a stable bearing surface. Our laboratory cesults indicate most of the fill and glacisl till soils contain a high fraction of fines (silt and clay particles) which will make them particularly unsitive to moisture conditions. The ability to use these soils as swctural fill will depend on their moisture content and the prcvailing weather conditions at the time of conswc'.ion. It may be necessary to import fill soil if moisturc conditions of the on-site soils cannot be controlled. Where importing fll soil is requircd to raise site�ades, we rccommend using a granularsoil that meets the following grading rcquirements: U.S.Sieve Size Percent Passiog Maximum Aggegate 100 3 inches No.4 75 maximum , No.200 5 maximum• 'Based on the 3/4 inch fraction. Prior to use, Terra Associates, inc. should examine and test all on-site or imported materials proposed for use as structural fill. Project No.T-2736-1 Page No.4