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North sate College aster Plan Roseville, Mi esota Supple~~nent Findings of Fact Conclusions of Law And ®rder 17. Expansion of the College will result in an increase in water consumption over the course of the project. The City of Roseville and the City of Arden I~il1s will each absorb half the increased demand and can do so without risk of significant environmental impact. No evidence presented during the EAW process indicated that either City's municipal water system was inadequate to meet water consumption demands. 1 The project would not involve changes in water surface usage, and therefore does not create a risk of significant environmental effects on water surface usage. 19. Several commenting parties in the EAW process asserted that construction of a proposed parking lot near Little Lake Johanna would present sedimentation, erosion, and water quality problems. In response to public comments, the applicant has agreed not to include the proposed parking lot near Little Lake Johanna in its expansion plans. Remaining potential impacts due to soil removal can be mitigated by temporary and permanent erosion control measures and best management practices. MPCA oversight under the NPDES permit, as well as oversight by RCWD, the City of Roseville, and the City of Arden Hills, will also mitigate potential impacts from erosion and sedimentation. 20. Impervious surface at the project site will increase as a result of the project. The increase in surface water runoff will not create the potential for significant environmental lake impacts that are reasonably expected to occur. Potential surface water impacts to the lakes can be mitigated through Best Management Practices identified in the Stormwater Management Plan including: wet detention ponds; pollution prevention such as material storage control, turf management, parking lot cleaning; pervious pavements to reduce the amount of runoff; infiltration practices and filter devices which preliminarily trap solids that have pollutants attached to them. These requirements will be imposed as part of the approval process for the project. Pertinent requirements of the City, MPCA, and RCWD require that water runoff rates and volumes be equal to or less that pre-project rates and volumes. 21. Expansion of the College will result in increased sewer usage on campus over the course of the project. The City of Roseville and the City of Arden Hills will each absorb half of the increased waste water and each will send the wastewater to the Metropolitan Wastewater Treatment Plant, which has adequate capacity to treat the additional wastewater without risk of significant environmental impact. 22. The project may have a minimal impact on soil conditions, but will not create the potential for significant environmental impacts on soil conditions that are reasonably expected to occur. Potential impacts on soil conditions will be mitigated through Best Management Practices to ensure that site runoff and siltation are minimal or prevented. -4-