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<br />The described soil borings were to a depth of 20 feet below the surface, and no <br />bedrock was encountered. According to MossIer and Cleland, depth to bedrock in <br />the area is approximately 100 feet (Depth to Bedrock Map, County Atlas Series, <br />Atlas C-7, Plate 5 in the Geologic Atlas, Ramsey County, Minnesota, University <br />of Minnesota, St. Paul, 1992). <br /> <br />The described soil boring logs are available for review upon request. <br /> <br />17. Erosion and Sedimentation: <br />Give the acreage to be graded or excavated and the cubic yards of soil to be <br />moved: <br /> <br />Improvements to the site will not require significant grading. The site has already <br />been mass graded as part of improvements to the Business Park in 1997. An <br />erosion control plan is not required for review by the Watershed District due to <br />the acreage to be distributed. <br /> <br />Describe any steep slopes or highly erodable soils and identify them on the <br />site map. <br />No steep slopes are located on the property. Minimal potential for problem <br />erosion exists. <br /> <br />The Solutia site was graded to pad elevations during mass grading in 1997. <br />Grading, utility, street and drainage pond construction has been completed. The <br />earthwork required to final grade the site will be minimal. <br /> <br />It is anticipated that during site grading, existing topsoil will be stockpiled and <br />later re-applied in the landscape areas. The remaining ground will need to be <br />adjusted to final grade with proper soil preparation to support the buildings and <br />parking lots. <br /> <br />Describe the erosion and sedimentation measures to be used during and after <br />construction of the project. <br />Standard practices for erosion control will be followed for this site. Anticipated <br />BMP's are: Rock Entrance to minimize soil tracking on the roadways from <br />vehicle traffic; silt fence / hay bale interception to keep silt and fine soils from <br />eroding off-site and onto hard surfaces; storm sewer inlets will be screened to <br />minimize the loss of soil into the existing and proposed storm structures. <br />Although reviewed by the watershed is not required, final grading plans will meet <br />or exceed the Rice Creek Watershed District requirements for erosion control. <br /> <br />Page 15 <br />