Agenda - Council - 07/26/2005 - Laserfiche WebLink

Home

Minimum depth (in feet) Average depth Groundwater 15 ft Groundwater 29 fl: (4 ft based on borings) Bedrock 59 ft Bedrock 90 fl: Groundwater and bedrock information is from four wells in Section 20 in T32 R25 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 CVv~I, an in-depth geotechnical .evaluation was performed on the property in Fail 2004 that incIuded 15 soil bor/ngs and 55 tes.t pits. The max/mum groundwater elevation was found to be as shallow as 4 ft within numerous pits at the I 0 ft or greater depth. The geotechnical report noted drainage characteristics for the property ranging from poorl3) 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, [omny sand, or sandy loam) have low rUnoffpotential and high infiltration rates even when' thoroughly wetted. They consist chiefly of deep, well to exces.s, ively drained sands or gravels and have a high rate o f 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 t~en to prevent spills. Type D soils (clay loam, silty clay loam, sandy clay, silty clay, or clay) have high runoffpotenfial. They have very low inliltration rates when thoroughly wetted and consist chiefly of clay soils wi~h 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/hi:). a. Describe types, amounts and compositions of solM or hazardous'wasteS, including solid animal manure, sludge and ash, produced during construction and operation. Identify method and location ¢ 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 reCuction assessments. Constrttct-ion activities for. this residential development will generate si~ificant w~te on the site. The amo~t of wasle will be t~ical of a construction project. The con,actor Mtl dispose of~y w~tes generated at the site in an approved method or faciliW. The con,actor will be enco~aged to recycle any construction w~te that Can be recycled. All brush ~d tree w~te generated by cons~ction will be chipped or otherwise recycled and will not be burned on site. " A[ler construction, Wpical residential solid w~te and ho~ehold h~ardom w~tes will be generated. ~1 solid wastes will be handled by a City of Ra~ey licensed solid w~te hauler. Ho~ehold h~dom w~te generated from individual homes in this development can be disposed of at the ~oka County Househpld H~ardous W~te Facility. For residential properties, the majority of the solid waste generated will include paper, org~ics (food wastes,. text/les/clothes, wood and robber pmduc~), y~d w'~tes, and ifie2 solids and ho~ehold h~ardom w~tes. The remaining wastes will include pl~tics, metals, ~d gl~s, ~d yew small percentages of specialized w~tes such ~ oversized bulky w~tes.