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<br />~-6 <br /> <br />R we Stonnwater Amendments <br />Page 3 <br /> <br /> Existing Regulations Proposed Regulations <br />Driveway Requires minimum 10 a) Reduces widths to 9 feet of pavement (with <br />Widths foot width for one-way minimum unobstructed width of 10 feet) and 18 <br /> and 20 foot width for feet of pavement (unobstructed width of20 feet), <br /> two-way driveways; does respectively <br /> not address single-family b) Additional width at curb may be required for <br /> driveways turning movements <br /> c) Applies to sites with parking for 5 or more <br /> vehicles, but not to public or private streets <br /> d) Minimum width for 5 or less vehicles <br /> (including single-family) is 9 feet of pavement, <br /> with 10 feet unobstructed <br />Driveway Requires asphalt Allows for permeable paving materials subject to <br />Surfaces pavement, concrete, or Engineering determination that materials will <br /> equivalent paving support anticipated weights and will not erode <br />Parking Lot Minimal landscape a) Parking in excess of minimum required must <br />Design requirements be of permeable materials <br /> b) Encourages permeable materials elsewhere, <br /> particularly at perimeter of parking lots <br /> c) Where possible, direct drainage flows to <br /> landscape or other permeable surfaces <br /> d) Use "concave" rather than "convex" landscape <br /> forms <br /> e) Suggests other best management practices <br /> (BMPs), including wheel stops, vegetated swales, <br /> parking groves <br />Streetscape No requirements; Encoùrages use of more permeable materials and <br />Provisions currently deals only with for sidewalks, park strips and drainage in right- <br /> fences of-way, subject to approval by Engineering <br />Open Space for Requires minimum a) Allows rooftop gardens and rooftop <br />Multiple- usable open space to be landscaping to satisfy open space requirements <br />Dwelling provided per unit; b) Encourages pervious areas for usable open <br />Residential specifies both common space to be available for infiltration of runoff <br /> and private open space <br /> requirements <br />Architectural Provides criteria for Adds subsection (I) to address provision of <br />Permits review of Architectural permeable areas and drainage design to capture <br /> Permits, but not related and treat stormwater runoff <br /> to stormwater treatment <br />Variances Specifies applicability, Adds "minimum pervious area" to list of <br /> process and findings development standard for a variance may be <br /> requested <br />