CCP 02-19-2002 - Laserfiche WebLink

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e e e Gatewav Business Center - Arden Hills. MN EAW September 2001 20. a depth of 12.5-14 feet below grade at one of the borings, The swamp deposits at this location appear to have been in a lower elevation area which was filled during previous development of the property, The swamp deposits are very soft, based on N- values, Glacial till soils are the predominant soils at this site, The upper portion of the till is weathered at some boring locations, The till consists of sandy lean clay, clayey sand and silty sand. The clayey glaeial till soils are typically soft to stiff, based on N- values, and the silty sand glacial till is medium dense to very dense. The glacial till soils contain gravel. Some of the glacial till soils also include cobbles and boulders. Alluvial soils are present at the transition between the topsoil and glacial till and layers of coarse alluvium also exist within the glacial till. The coarse alluvial soils consist of sand with silt and silty sand, Based on N-values, the coarse alluvial soils vary from loose to very dense. The coarse alluvial soils contain varying amounts of gravel. Cobbles and boulders can also be present within coarse alluvial soils, Some fine alluvium and mixed alluvium are also present within the soil profile, The fine alluvial soils consist of lean clay and the mixed alluvial soils consist of silty sand and clayey sand, According to the Phase I Environmental Assessment, one of the twelve geoteehnical soil borings eontained 12 feet of fill comprised of sand and cinders, The source of the cinders is unknown and represents a potential source of contamination, According to the Soil Boring Report, it is unlikely that these materials were placed and compacted in a controlled manner. A Phase II EA was completed in May 2001. See Section 9, Potential Conflicts Involving Environmental Matters, for a more detailed discussion. Proposed slopes will not exceed 3:1 (horizontal to vertical ), Retaining walls will be used in some areas to maintain slopes 3: I or flatter and to avoid wetland impact. Best Management Practices will be used for control of erosion and sedimentation, Erosion control measures will include silt fence, rock construction entrances and silt sack inlet filters, Solid wastes; Hazardous Wastes; Storage Tanks a. Describe types, amounts and compositions of soiid or hazardous wastes, including solid and animal manure, sludge and ash, produced during construction and operation. Identify method and location of disposal. For projects generating municipal solid waste, indicate if there is a source separation plan; describe how the project will be modified for recycling. If hazardous waste is generated, indicate if there is a hazardous waste minimization plan and routine hazardous waste reduction assessments. All existing buildings on the site will be razed and hauled to a lieensed demolition landfill. Hazardous materials, if any, will be removed by licensed professionals and disposed of as required by law. A Phase I Environmental Assessment will be conducted on the existing ATS Steel buildings prior to acquisition, The demolition Page 21