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• <br /> S chaffer SFR <br /> Other Hard Surfaces feasibility description: <br /> 1. Full Dispersion per BMP T5.30 <br />• i. As noted above, Full Dispersion is infeasible due to all available <br /> dispersion flow paths being less than 100' in length to wetland and <br /> property boundaries. <br /> 2. Permeable Pavement per BMP T5.15 <br /> i. Infeasible due to inadequate soil depth to provide proper separation <br />• beneath any potential permeable pavement facility. —12"to hardpan <br /> 3. Rain Garden or Biorention per BMP T5.14A <br /> i. Due to inadequate soil depth to provide proper separation beneath any <br /> potential rain garden or bioretention,these facilities are infeasible. <br /> 4. Sheet Flow Dispersion per BMP T5.12. <br /> i. Sheet Flow Dispersion is feasible for the site due to the presence of <br />• adequate flow path length downslope of the proposed driveway. <br /> Minimum Requirement # 6: Runoff Treatment <br /> Due to the site proposing less than 5,000 sf. of new/replaced pollution generating <br /> impervious surfaces (-400 sf. of PGIS),runoff treatment is not required. <br />• <br /> Minimum Requirement # 7: Flow Control <br /> Due to the site proposing less than 5,000 sf of new/replaced hard surfaces, runoff <br /> treatment is not required. <br />• Existing and Developed Site Summary <br /> Total Property Area = 18,228 sf. (0.418 Ac.) <br /> Total On-Site Clearing = 3,200 sf (0.073 Ac.) <br /> Existing Site <br />• Site Hardscape Area: <br /> None <br /> Site Vegetated Area: <br /> Existing Forest = 14,125 sf. (0.324 Ac.) <br /> Existing Wetland = 4,103 sf. (0.094 Ac.) <br />• <br />• <br />• <br />• WESTERN ENGINEERS,INC. 12 PROJECT:17-1666-A <br />