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May 6, 2015 Page 8 of 1 1 MPCA Comment: Without knowing the site elevation, it is hard to determine what the groundwater depth is from grade. Given that there are wetlands located less than 150 feet from the site, it could be reasonable to assume groundwater is quite shallow. During construction, dewatering may be required. It may be necessary to obtain a Minnesota Department of Natural Resources water appropriation permit for this activity. Additionally, depending on the method for disposal of the water from the dewatering activity, it may be necessary to obtain an MPCA NPDES/SDS waste water permit if discharge is to a water body, wetland, or land surface. ROSEVILLE's Comment: As above. RAMAKER Comment: If dewatering was to be required during the construction stage of the project, all dewatering will follow the guidances outlined in the forthcoming Waste Handling Plan (see 13 A. & B., below). The Waste Handling Plan will provide a summary on when dewatering will occur and how the water is to be treated (stormwater sewer, sfanitary sewer, or bulk storage for off-site disposal, etc.). Further details will follow, and will be made available prior to fihe inifiiation of consfrucfion. 12BI. & BIII. WATER RESOURCES MPCA Comment: The stormwater management plan should be summarized here to reflect the information requested in these sections. ROSEVILLE's Comment: State see above and note section where you discussed storm water plan. RAMAKER Comment: See below: 1 2Bi - Storm water: Describe the quantity and quality of storm water runoff at the site prior to post construction. Include the routes and receiving water bodies for runoff from the site (major downstream water bodies as well as the immediate receiving waters). See Section 4.1 and 4.2 of the Storm Water Management Plan, prepared by RAMAKER and dated February 13, 2015. Discuss any environmental effects from storm water discharges. Describe storm water pollution prevention plans including temporary and permanent runoff controls and potential Besf management Practice {BMP) site locations to manage or freat storm water runoff. Identify specific erosion control, sedimentation control or stabilization measures to address soil limitations during and after project construction. See forthcoming Storm Water Pollution Prevention Plan to be completed by RAMAKER. Specifics regarding these criferia will be outlined throughout fihe report. Please contact Jesse Mesner of Cities Edge Architecfis fio schedule a pre-consfruction review of the plan. 1 2Biii - Surface Waters: a) Wetlands: Describe any anticipated physical effects or alterations to wetland features such as draining, filling, permanent inundation, dredging and vegetative removal. Discuss direct and indirect environmental effects from physical modification of wetlands, including the anticipated effects that any proposed wetland alferations may have to the host watershed. Identify measures to avoid {e.g., available alternatives that were considered), minimize, or mitigate environmental effects to wetlands. Discuss whether any required compensatory wetland mitigation for unavoidable wetland impacts will occur in the same minor or major watershed, and identify those probable locations. The project will be provided wifh a detention area thafi will control the rate of runoff as well as provide some degree of wafier treatment and oil removal. Runoff discharge will be connected to the existing ROSEVILLE sform wafier sewer system and pre and posf-development runoff rates will remain unchanged or reduced. Therefore, effects to existing nearby wetlands are not expected. Storm water will be diverted to ROSEVILLE's existing storm sewer system. As such, there will be no net increase and/or Direct/Indirect effect to wetlands. b) Other surface waters: Describe any anticipated physical effects or alterations to surface water features {lakes, streams, ponds, intermittent channels, county �judicial ditches) such as draining, filling, permanent inundation, dredging, diking, stream diversion, impoundment, aquatic plant removal and riparian alteration. Discuss direct and indirect environmental effects from physical modification of water features. Identify measures to avoid, minimize, or mitigate environmental effects to surface water features, including in-water Best Management Practices that are proposed to