10/16/2006 Annual Town Meeting - Laserfiche WebLink

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through the use of constructed (stormwater) wetlands, bioretention facilities, vegetated filter strips, rain gardens, wet (retention) ponds, water quality swales, organic filters or similar site-appropriate current best management practices capable of removing significant amounts of nitrogen and other contaminants from stormwater. Said stormwater treatment facilities shall be designed and sized to retain up to the first inch of rainfall from their catchment area within the area designed for nitrogen treatment, before any overflow to subsurface leaching facilities and otherwise meet the Stormwater Management Standards and technical guidance contained in the Massachusetts Department of Environmental Protection's Stormwater Management Handbook, Volumes I and 2, dated March 1997, for the type of use proposed and the soil types present on the site. Such runoff shall not be discharged directly to rivers, streams, other surface water bodies, wetlands or vernal pools. Except for overflow from stormwater treatment facilities as described above and when there are no other feasible alternatives, dry wells shall be prohibited. Except when used for roof runoff from non-galvanized roofs and for runoff from minor ,residential streets, all such wetlands, ponds, swales, or other infiltration facilities shall be preceded by oil, grease and sediment traps or forebays, or other best management practices to facilitate control of hazardous materials spills and removal of contamination and to avoid sedimentation of treatment and leaching facilities." or take any other action relating thereto. Submitted by Planning Board Explanation: This article is intended to update the stormwater management by-law adopted in 1999 by specifying additional practices and facilities which appear to be effective in. reducing nitrogen in runoff, deleting reference to certain facilities which have not proven effective and providing additional design guidance regarding volume of flows required to be treated. The article also renum ers the section to move it to a more appropriate section of the zoning by-law. The Board of Selectmen recommends approval. The Finance Committee recommends approval by a vote of 4-0. Motion made to dispense with reading of article Motion to dispense with reading of article passes at 8:43 PMO Planning Board voted at a Public Hearing held on September 20, 2006 5-0 to recommend approval. Motion made by Selectman Don Myers. Motion: I move Article 24 be voted as printed in the warrant, except for the phrase "or take any other action relating thereto". Motion passes unanimously at 8:13 PM. 19