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Article 6: Development Standavi <br /> Section 6.14:Stormwater Management <br /> (5) Proposedrepesed new development may satisfy the review criteria standards of <br /> this section by m hhepnoc�t�rlo binnmont hvdrol�or criteria cot Q-1-it i <br /> ha ter '2 of the meet recent Vercien of the North r�amlina I QVI IMDA <br /> 168using a Runoff Volume Match design approach (also <br /> referred to as a Low Impact Development (LID) design approach) in conformance <br /> with 15A NCAC 02H.1002 (44). If pursued, a Runoff Volume Match design <br /> approach must include the use of the accounting methodologies approved by the <br /> North Carolina Division of Energy, Mineral, and Land Resources (NCDEMLR).169 <br /> (B) Additional Standards— Falls Lake Watershed <br /> (1) In addition to the standards contained in Section 6.14.6 (A) of UDOthis <br /> Ordinance170, development shall observe a no net increase in peak flow leaving <br /> the site from predevelopment conditions for the 1 year, 24 hour, storm. <br /> (2) Proposed new development using a Runoff Volume Match design approach for <br /> satisfying stormwater management requirements must also include the <br /> estimation of pre-development and post-development nutrient export rates (e.g_ <br /> Nitrogen and Phosphorous) for the proposed development, using the nutrient <br /> accounting methodologies approved by the North Carolina Division of Water <br /> Resources (NCDWR). Nutrient export estimates are required for Runoff Volume <br /> Match record-keeping purposes.171 <br /> P Additional Standards — lard2n I2ka Wntarchad <br /> Qpd'papc;t;4�� 173 <br /> 6 1466.14.7 Nutrient Load <br /> (A) Nitrogen and phosphorus loads contributed by proposed new development shall not <br /> exceed the following unit-area mass loading rates: <br /> (1) Falls Lake Watershed <br /> (a) Nitrogen, 2.2 pounds per acre per year <br /> (b) Phosphorus, 0.33 pounds per acre per year <br /> (B) The nutrient export from each new development shall be calculated in pounds per acre <br /> per year (using the approved accounting tools 174) in accordance with the methodologies <br /> approved by the North Carolina Division of Water Resources (NCDWR).17e <br /> 168 NOTE: The original UDO text, "by meeting the post-development hydrologic criteria set out in Chapter 2 of the <br /> most recent version of the North Carolina Low Impact Development Guidebook"was accidentally deleted/accepted <br /> duringthis 1+year-IongUDO text amendment review process. For the purposed of universal clarity,the original <br /> text has been artificially added in herewith a stri keth rough font, so asto showwhatthe original textlooked like. <br /> This artificially added text must be deleted manuallyafter all TRACK CHANGES are eventually accepted for formal <br /> UDO adoption. <br /> 169 Section 6.14.6(A) 5 has been updated to refer to the state's current useof the term "Runoff Volume Match", <br /> rather than referencingthe now outdated 2009 LID Guidebook, AND basedon Legal Sufficiency Review comments. <br /> 170 Consistent reference to "this Ordinance". <br /> 171 Required per the state's most current Neuse-Tar-Pamlico Rules. <br /> C 1,r,of o tor,t r ofo r e r„-e t., Thio 0-1:di n Ac.@" <br /> 173 Section 6.14.6(C) is no longer needed, as the a I I owa bl e us e of"Ru noff Volume Match" methodology applies to <br /> both the Falls La ke Wa ters hed and the Jordan Lake Watershed,as specified in revised Section 6.14.6(A). <br /> 174 Text correction—added "s". <br /> 175 Revised to refer to NCDWR for approved nutrientaccountingtoo Is,rather than NCDEQ. <br /> Orange County, North Carolina— Unified Development Ordinance Page 6-101 <br />