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,04417,11h4\4,',. Water Resource Engineering Division Dane County Land&Water Resources Department tmak d.00ov : Jeremy D.Balousek,P.E.,Division Manager DATE: July 20, 2017 TO: Jack & Georgia Lazzaro FROM: Jason Tuggle Urban Erosion Control Analyst RE: 3392 Quam Drive—Shoreland Mitigation Plan, MG2017-0252 Associated Permits:5E2017-0251 and DCPSHL-2017-00049 The shoreland mitigation plan, dated July 5, 2017, meets all applicable mitigation requirements of Chapter 11 Dane County Code of Ordinances. The project is subject to the following permit requirements: 1. All components of the mitigation plan must be constructed and implemented in accordance with the approved plans and applicable NRCS/DNR/County Technical Standards. 2. As-built certification, performed by a professional engineer, is required for all permanent stormwater management practices and facilities. As-built plans must be submitted within 10-days of project completion. 3. Stormwater management practices must be maintained in accordance with the maintenance agreement on file with the Dane County Register of Deeds. Performance Standard Proposed Practices and Performance Achieved No Increase in Impervious Surface Impervious surfaces will be limited to the extent shown on the plan. A bioretention basin will be constructed as detailed in the approved plan.The bioretention basin is designed to achieve 90% predevelopment stay-on or better.The bioretention basin will treat 1,300 sq.ft.of impervious surface thereby reducing the effective impervious area to 4,504 sq.ft. (25.6% impervious surface ratio). 40%TSS Reduction Not applicable to this development. Lyman F.Anderson Agriculture&Conservation Center 5201 Fen Oak Drive,Room 208,Madison,Wisconsin 53718-8812-PH:608/224-3730,FAX:608/224-3745 www.wred-lwrd.counryofdane.com