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Minimum depth (in feet) Average depth
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<br /> Groundwater At surface Groundwater 613 fl:
<br /> Bedrock >80 ft Bedrock >80 fl:
<br />Groundwater and bedrock intbrmation is for well 169486 in section 16 in T32 P,.25 of Anoka County (west edge of
<br />the site), from the County Well Index. No bedrock was encountered in this 80 ft deep well, and groundwater.was 20
<br />ff deep. In addition to the CWI well data, data was used from 18 borings drilled for Braun Intertec's geotechnical
<br />investigation in March 2004. These borings encountered groundwater in 12 of the borings at the surface or to
<br />depths as great as 9 t~et. Most of the borings caved in after drilling, so depth to water is from the "while drilling"
<br />cstimatcs.
<br />According to Wenck and Associates' Response Action Plan for the St. Anthony Gun Club, the first encountered
<br />bedrock is presumed to be the Franconia Sandstone, encountered at approximately 100 to 150 feet below the
<br />surthcc at the site.
<br />There are no known sinkholes, shallow limestone formations or karst conditions at the site.
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<br />b. Describe the soils on the site, giving NRCS (SCS) classification, s, if known. Discuss
<br /> soil granularity and potential for groundwater contamination from wastes or chemicals
<br /> spread or spilled onto the soils. Discuss any mitigation measures to prevent such
<br /> contamination. ~_
<br /> According to the Soil Survey of Anoka County, soils on the site are Mc (Histosols), Rf (Rifle mucky peat), NyA
<br /> (Nymore loamy sand, 0 to 2 percent slopes), NyB (Nymore loamy sand, 2 to 6 percent slopes), NyC (Nymore
<br /> loamy sand, 6 to 12 percent slopes), Me (IVleehan sand), Is (Isan sandy loam), and Ma (Markey muck). The
<br /> distribution of these soil types is shown in Figure 4.
<br /> Type D soils (clay loam, silty clay loam, sandy clay, silty clay, or clay) have high runoffpotential. They have very
<br /> low infiltration rates when thoroughly wetted and consist chiefly of clay soils with a high swelling potential, soils
<br /> with a permanent high water table, soils with a claypan or clay layer at or near the surface, and shallow soils over
<br /> nearly impervious material. These soils have a very low rate of water transmission (0 to 0.05 in/hr). Since the rate
<br /> of water transmission is low on these soils, there is greatly reduced risk of groundwater contamination from wastes
<br /> or chemicals reaching the groundwater if spilled on these soils. However, the area of the site covered by these soils
<br /> is relatively small.
<br /> Type A soils (sand, loamy sand, or sandy loam) have low runoff potential and high infiltration rates even when
<br /> thoroughly wetted. They consist chiefly of deep, well to excessively drained sands or gravels and have a high rate
<br /> of water transmissiou (greater than 0.3 in/hr). There is an increased chance ofgrotmdwater contamination in these
<br /> soils due to the higher rate of water transmission, which occur ona majority of the site, and therefore precautions
<br /> should be taken to prevent spills of wastes or chemicals.
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<br />a. Describe types, amounts and compositions of solid or hazardous wastes, including
<br /> solid animal manure, sludge and ash, prodUced during construction and operation.
<br /> Identify method and location of disposal. For projects generating municipal solid
<br /> waste, indicate if there is a source separation plan; describe how the project will be
<br /> modified for recycling. If hazardous waste is generated, indicate if there is a
<br /> hazardous waste minimization plan'and routine hazardous waste reduction
<br /> assessments. - - ..
<br /> Construction activities for this residential development will generate si~ificant w~te on the site. The amount of
<br /> waste will be typical of a construction project. The contractor will di~Se of any w~tes generated at the site in an
<br /> approved method or t~cili.ty:'~he 'contractor will be enco~aged to recycle any construction w~te that can be
<br /> recycled. All brush and tree w~te generated:by construction'will be chippe)'or othe~ise recycled and will not be
<br /> burned on site.
<br /> Aider constntction, typical residential solid w~te.,and hazmdo~ w~tes will be generated. For residential
<br /> properties, the majority of the solid w~te generated will include paper, organics (food w~tes, textiles/clothes,
<br /> wood and rubber products), yard w~tes, and inert solids and ho~ehold hazardo~ w~tes. The remaining w~tes
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