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Policies,Practices,Programs,Regulations and Activities Document Effectiveness Rationale for <br /> (Existing and potenNal) Reference for Mitigation Effectiveness <br /> (Include page (High/Medium <br /> numbers or /Low/Not <br /> Other Source) Effective) <br /> Notes:gaps, <br /> shortfalls, <br /> conflicts, or <br /> 0 ortunities <br /> 04/03/90) <br /> Management of Stormwater Abbreviated: Section 15-263 High Limits or <br /> Additional disallows <br /> (c) Developments must install and maintain financial construction <br /> stormwater management systems that will control and support to offset within flood <br /> treat runoff from the first one inch of rain as follows: engineering hazard areas, <br /> expenses would reduces runoff <br /> benefit both the and limits <br /> (1) Draw down the treatment volume no town and the damage to <br /> faster than 48 hours,but no slower than developer. properties and <br /> 120 hours. water quality. <br /> Opportunities <br /> (2) Achieve an eighty-five percent(85%) exist for storm <br /> average annual removal rate for Total water <br /> Suspended Solids. mitigation <br /> To the extent reasonably practicable, the stormwater computer <br /> management systems designed and constructed to models to assist <br /> satisfy the requirements of this section shall utilize best in selecting <br /> management practices that reduce nutrient loadings. water qualiry <br /> (AMENDED 6/24/08) and quantity <br /> BMP's. <br /> (d) Developments shall be constructed and Additional <br /> maintained so that their stormwater management assistance is <br /> systems meet the following minimum standards: needed ro fund <br /> water quality <br /> (1) The post-development discharge rates monitoring on <br /> shall be less than or equal to the pre- an ongoing <br /> development discharge rates for the 1-, basis. <br /> 2-,5-, 10-, and 25-year 24-hour design <br /> storms. <br /> (2) For upstream properties, the 1°lo <br /> chance flood elevation may not <br /> be increased. <br /> Sedimentation and Erosion Control. Section 15-264 Medium Supports <br /> (b) The Orange County Erosion Control Officer is authorized Financial floodplain <br /> b resolution of the Cairboro Boazd of Aldermen to assistance rotection and <br /> 99 <br />