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15. Water surface use. Will the project change the number or type of watercraft on any water body? Yes No If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or conflicts with other uses, No recreational surface waters are present on the site. 16. Erosion and sedimentation. Give the acreage to be graded or excavated and the cubic yards of soil to be moved: acres ->' cubic yards--"- Describe any steep slopes or highly erodible soils and identifY them on the site map, Describe any erosion and sedimentation control measures to be used during and after project construction. Improvements to the site wil1 not require significant grading. The site has already been mass graded as part of improvements to the Business Park in 1997. An erosion control plan is not required for review by the Watershed District due to the acreage to be distributed. No steep slopes are located on the property. Minimal potential for problem erosion exists. The Solutia site was graded to pad elevations during mass grading in 1997. Grading, utility, street and drainage pond construction has been completed. The earthwork required to final grade the site will be minimal. It is anticipated that during site grading, existing topsoil will be stockpiled and later re- applied in the landscape areas. The remaining ground will need to be adjusted to final grade with proper soil preparation to support the buildings and parking lots. Standard practices for erosion control will be followed for this site. Anticipated BMP's are: Rock Entrance to minimize soil tracking on the roadways from vehicle traffic; silt fence / hay bale interception to keep silt and fine soils from eroding off-site and onto hard surfaces; storm sewer inlets will be screened to minimize the loss of soil into the existing and proposed storm structures. Although reviewed by the watershed is not required, final grading plans will meet or exceed the Rice Creek Watershed District requirements for erosion control. 17. Water quality: surface water runoff a. Compare the quantity and quality of site runoff before and after the project, Describe permanent controls to manage or treat runoff Describe any stormwater pollution prevention plans. The Centre Pointe Business Park has been developed with sites meeting the Business Park PUD requirement of 25% green space. The 1997 EA W was developed assuming that 25% of the developed area would be green space. The proposed improvements to the Solutia site will exceed the minimum green space requirements of 25%. Environmental Assessment Worksheet Centre Pointe Business Park Page 13 of 29