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Other Hard Surfaces: <br /> 1. Full Dispersion: Not feasible due to not having 65% preserved vegetation or 100 foot <br /> flow path. <br /> 2. Permeable Pavement: Not feasible due to concerns associated with infiltrating <br /> directly upgradient of the proposed duplex foundation. <br /> 3. Rain Gardens/Bioretention: Not feasible as the only are that is flat enough to <br /> construct a rain garden is directly above the proposed duplex. Infiltrating in this location is <br /> not recommended. <br /> 4. Sheet Flow Dispersion: Feasible and selected for this project. The driveway will <br /> sheet flow over amended soils to the west. A 2 foot wide transition zone shall be used. <br /> 5. Concentrated Flow Dispersion: Higher priority option selected. <br /> 7. SUMMARY <br /> This project proposes to construct less than 5,000 sf of new hard surfaces. As a result, the <br /> use and land cover for less than 5,000 sf of the site will be converted pervious to impervious <br /> surfaces. Stormwater management techniques have been incorporated into the design. <br /> Therefore, the stormwater design for this project has met or exceeded all of the applicable <br /> Minimum Requirements 1-5. <br /> Pyatak Duplex 18-0622 <br /> August2017 Page 10 <br />