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Article 6: Development Standards 19 <br /> Section 6.14: Stormwater Management <br /> (E) Permanent Nutrient Export Reduction Best Management Practices <br /> (1) Allowable on-site structural stormwater BMPs for nutrient reduction shall include <br /> those listed in the current NC DWQ Stormwater Best Management Practices <br /> Manual (Stormwater BMP Manual)or others approved on a case by case basis. <br /> (2) Design, maintenance and operation of stormwater BMPs shall follow standards <br /> provided in the Stormwater BMP Manual. <br /> (3) Deviations from these standards may be allowed as approved on a case by case <br /> basis. <br /> The r <br /> fnlIG_INino nn_c'+e l3NIlPs may be u fl' d for red 4ie + f <br /> � <br /> rdeyelenman+s• <br /> (4) Wet etct en pa;mss; <br /> (5) (Genstrueted wetlands, <br /> (6) Open GhaR„e;p Gt+EaG <br /> (7) RipaKianuffers, <br /> (8) Biereter�ti r <br /> (g) <br /> (F) Total Nutrient Removal Rates <br /> Total nutrient removal rates of stormwater BMPs and BMPs in a series will be calculated <br /> pursuant to the approved accounting tool. <br /> Quality's Stormwater Best Management PraGtiGes MaRUal (StGFmW2teF E3MP M2Rua4-. <br /> To FeG9iVe full AI_'tPiP_Rt redUGtieR Gredit, design st@Rdapds FRUSt follow those outliRe44R <br /> the StGFMwateF BMP Manual. k/2riaRP-es; frern the design standards may be allowed as <br /> appFeved n a e by s e basic <br /> 6.14.8 Peak Runoff Volume <br /> (A) Standard <br /> For all new development, there shall be no net increase in peak flow leaving the site from <br /> the predevelopment conditions for the 1 year, 24 hour storm. <br /> (B) Exemptions to the Peak Flow Requirements <br /> 0) Peak flew requirerneRts 2re waived feF development that meets the fG!lc)W!*R- <br /> c nri <br /> (a) IRFease in peak flow between pre-and post development 44 <br /> does not eXG88d 100%. <br /> b) Proposed new development meets II f the fA_lIGWiRg '+ <br /> (i) Total impervieas SU42se is less than ; 2-Rd <br /> (iiT---Remaining pervious suFfaGe maximizes StC)FMW@teF FURE)ff GGRtFGI <br /> and GGRveyaRGe. <br /> (G) Detention Will a e further flooding lands that h <br /> flee ding d s+orrn events- <br /> (2) <br /> PFGfoss al eRgiReor and s hmitted ' WritiRq to the RaRRiRg Di + <br /> Designee. Appeals .d als of this e will follow C +' 2.24 f this Q di <br /> �- <br /> (C) Calculating Peak Runoff Volume <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-106 <br />