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r~~' <br />DRAFT -CONDITIONS OF APPROVAL - BUCKHORN VILLAGE May 7, 2008 <br />8. STORMWATER MANAGEMENT. The following standards shall be observed with <br />respect to stormwater management activities for the project: <br />a. Riparian areas (stream buffers) shall be maintained in compliance with the <br />Orange County Stormwater Ordinance for Lands within the Neuse River Basin <br />(Neuse Rules) adopted March 9, 2001, and as amended October 23, 2007. <br />b. Impacts to the Neuse stream. buffers on site shall comply with the uses listed in <br />the Neuse Rules and the Orange County Zoning Ordinance. Examples of listed <br />uses include utilities, roadways, etc. <br />If Neuse stream buffer mitigation is required as a result this development, <br />preference should be given to on-site mitigation such as stream buffer <br />enhancement and/or restoration. <br />c. The project shall comply with the stormwater requirements listed in the Neuse <br />Rules. This includes: <br />i. No net increase in peak flow leaving the site .from the' predevelopment <br />conditions for the 1-year, 24-hour storm; predevelopment conditions are <br />those currently existing as of Apri19, 2008, and <br />ii. Nitrogen load contribution leaving the site must be held to 3.6 lbs per acre <br />per year. <br />d. A Master Stormwater Management Plan (SMP) shall 'be developed to address <br />stormwater runoff for the entire development even though individual parcels may <br />be responsible for installing Stormwater best management practices (BMPs). <br />e. Innovative stormwater BMPs and practices shall be utilized that meet or exceed <br />the requirements of the current version of the North Carolina Division of Water <br />Quality Stormwater Best Management Practices Manual (July 2007). <br />f. The Neuse Rules allow commercial development to utilize a one time offset <br />payment to bring nitrogen down to the 3.6 lbs/ac/year if <br />g. The project shall utilize on-site stormwater best management practices (BMPs) to <br />meet these requirements to the extent practical. Using offset payments only in <br />lieu of stormwater BMP's will not be accepted. <br />h. The project shall install stormwater BMP's to remove enough nitrogen to bring <br />the development down to 3.61bs/ac/yr export OR do a combination of BMP's and <br />offset payment to achieve a 3.6 lbs/ac/year export. A combination of Stormwater <br />BMP's and offset payment will be allowed under the following conditions: <br />i. Onsite stormwater BMPs are designed so that the computed nitrogen <br />loading is below 7.0 lbs/ac/year that is more restrictive that the Neuse Rules <br />currently require. <br />ii. The offset fee to bring the remaining loading rate to the 3.6 lbs/ac/year is <br />used in Orange County. , <br />