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1. Appurtenances as sedimentation basins, debris basins, desilting basins or <br /> silt traps. <br /> 2. Installation of debris guards and microsilt basins on storm sewer inlets. <br /> 3. Use where necessary, oil skimming devices or sump catch basins. <br /> 4. Direct drainage away from the lake and into pervious, grassed, yards <br /> through site grading, use of gutters and downspouts. <br /> 5. Construct sidewalks and driveways of partially pervious raised materials <br /> such as decking which has natural earth or other previous material beneath <br /> or between the planking. <br /> 6. Use grading and construction techniques which encourage rapid <br /> infiltration, e.g. sand and gravel under impervious materials with adjacent <br /> infiltration swales graded to lead into them. <br /> 7. Install berms, water bars, or terraces which temporarily detain water <br /> before dispersing it into pervious area. <br /> 4_ Impervious surface coverage of lots must not exceed the following percentages <br /> of lot area: <br /> NE RD G R <br /> Single Family Residential 3077 30% 30% 30% <br /> Two Family /Duplex 30% 30% 30% 30% <br /> Triplex /Quad /Townhomes 35% 35% 35% 35% <br /> Commercial /Industrial 60% 60% 60% 60% <br /> 5. Medium density residential,commereial, and industrial structures, parking areas, <br /> and other facilities shall be treated to reduce visibility as viewed from public <br /> waters and adjacent shorelands by vegetation, topography, increased setbacks, or <br /> color, assuming summer, leaf -o, conditions. Veg e etativ and topographic <br /> screening shall be preserved, if r <br /> existing, or may be required to be provided. <br /> 6. Accessory structures and facilities shall meet the required principal structure <br /> setback and shall be centralized. <br /> 7. Multiple family developments shall contain open space meeting the following <br /> criteria: <br /> a. At least thirty -five (35) percent of the total development area shall be <br /> preserved as open space. <br /> b. Dwelling units or sites, land covered by road surfaces, parking areas, or <br /> structures are developed areas and shall not be included in the computation of <br /> minimum open space. <br /> Page 13 <br />