Orange County NC Website
Browse       Search
198 <br /> EXISTING ORDINANCE PROVISION(S1 : <br /> (SEE 6..28.71 <br /> PROPOSED ORDINANCE AMENOMENT[S] : <br /> 6.24.8 Cent • of the F' st 1 2" o Ru • r.m Im. erv'ous Sur ace. <br /> Stormwater runoff from impervious surfaces generally carry <br /> Large amounts of oil, nutrients, metals, bacteria and other <br /> pollutants. The amount of such pollutants in stormwater runoff <br /> is closely• associated with the Land use from which it <br /> originates.' An important determinant of water quality is the <br /> increase in impervious surfaces which prevent the natural <br /> infiltration of water into the soil. Most of the pollutant <br /> concentration is carried in the "first flush" of runoff. To <br /> control this pollutant load within the Water duality Critical <br /> Area the first one half—inch [1/2"] of runoff from all <br /> impervious surfaces in new developments shall be controlled. <br /> The purpose of the stormwater control measure is to reduce off <br /> site effects by minimizing clearing, compaction and overall site <br /> disturbance, while maximizing vegetated areas for stormwater <br /> infiltration . Methods to accomplish this standards shall <br /> include, in order of preference:• <br /> a•. on--site infiltration through the retention of <br /> undisturbed, vegetated areas <br /> b. structural or engineered infiltration measures, such as <br /> trenches or retention ponds, which reduce the amount of <br /> runoff <br /> c. detention structures that reduce the rate of runoff. <br /> Areas to which the standard applies shall include individual <br /> Lots or a new development as a whole. If applied to a <br /> development as a whole, the applicant must provide for <br /> installation and maintenance of proposed stormwater management <br /> facilities . Applicants shall be required to submit <br /> documentation• which indicates compliance with the specified <br /> standard. <br /> An individual Lot of 80,000 square feet or more in size created by <br /> deed or plat in accordance with Orange County Subdivision <br /> Regulations prior to the adoption of this provision shall be exempt <br /> from this requirement upon submittal of a site plan which <br /> demonstrates that the development of the property is in accordance <br /> wih the intent of this provision to minimize overall site <br /> disturbance; maximize maintenance of vegetated areas for stormwater <br /> infiltration; and protect critical drainageways and waterways from <br /> direct runoff impacts . <br />