Agenda - Council - 05/24/2005 - Laserfiche WebLink

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Minimum depth (in feet) Groundwater I5 fl: (4 fl: based on borings) Bedrock 59 fl: Average depth Groundwater 29 fl: Bedrock 90 fl: Groundwater and bedrock information is from four wells in Section 20 in T32 R2,5 of Anoka County, from the County Well index (CWI). The first bedrock encountered is the Franconia formation. There are no known sinkholes, shallow limestone formations or karst conditions at the site. In addition to the information obtained from the CWI, an in-depth geotechnical,evaluation was performed on the property in Fall 2004 that included 15 soil borings and 55 test pits. The maximum groundwater elevation was found to be as shallow as 4 fl: within numerous pits at the 10 fl:or greater depth. The geotechnical report noted drainage characteristics for the property ranging fi.om poorly drained for the silty sands and clays to fast draining for the sands. b. Describe the soils on the site, giving NRCS (SCS) classifications, if known. Discuss soil granularity and potential for groundwater contamination from wastes or chemicals spread or spilled onto the soils. Discuss any mitigation measures_to prevent such contamination. According to the Soil Survey of Anoka County, soils on the site are DnA (Dickman sandy loam), Dp (Duelm loamy coarse sand), HuA, HuB, HuC (Hubbard coarse sand), Is (Isan sandy loam), Ma (Markey muck), and NrD (Nymore loamy coarse sand). ~Type A soils (sand, loamy sand, or sandy loam) have low runoffpotential and high infiltration rates even when thoroughly wetted. They consist chiefly of deep, well to excessively drained sands or gravels and have a high rate of water transmission (greater than 0.3 in/hr). Since the rate of water transmission is high on a majority of the site, there is a risk of groundwater contamination from wastes or chemicals reaching the groundwater. Care will be taken to prevent spills. Type D soils (clay loam, silty clay loam, sandy clay, silty clay, or clay) have high mnoffpotentiaL They have ve~ low infiltration rates when thoroughly wetted and consist chiefly of clay soils with a high swelling potential, soils with a permanent high water table, soils with a claypan or clay layer at or near the surface, and shallow soils over nearly impervious material. These soils have a very low rate of water transmission (0 to 0.05 in/hr). -428- a. Describe ~pes, amounts and compositions of solid or hazardous wastes, including solid animal manure, sludge and ash, produced during construction and operation. Ide~ti~ method and location of disposal. For projects generating municipal solid waste, indicate if there is a source separation plan; describe h~w 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. Construction acti~ties fo~ this residential development will generate si~ific~t w~te on the site. The ~o~t of w~te will be ~ical cfa consmction project. ~e contr~tor will dispose of any w~tes generated at the site in an approved method or faciti~. The con,actor will be encomged to recycle any construction w~te that can be ' recycled. ~I b~h ~d tree w~te generated by cons~uqtion will be chipped or othe~ise recycled and Will not be breed on site. ARer cons~ction, ~ical residential solid w~te and ho~ehold h~ardom w~tes Will be generamd. MI solid w~tes wilt be handled by a City of Ramsey licensed solid w~te hauler. Ho~ehold h~mdo~ W~te generated ~m individual homes in this development can be disposed of at the ~oka County Household H~ardo~ W~te Facility. For residential propegies, the majority of the solid w~te generated will include paper, org~ics (food w~tes, textiles/clothes, wood and robber producB), yard ~tes, and ifie~ soli~ and ho~ehold h~ardom w~tes. The remaining w~tes ovemized bulky w~tes.