Orange County NC Website
Browse       Search
104 <br /> PROPOSED ORDINANCE AMENDMENT(S) : <br /> 6.23.4 REVISE Impervious Surface Regulated in Protected Watersheds, <br /> An impervious surface is a surface composed of any material <br /> which impedes or prevents the natural infiltration of water <br /> into the soil. . Such surfaces shall include any concrete or <br /> asphalt surface. These would include, but not be Limited <br /> to , streets and parking areas, sidewalks, patios and <br /> structures which cover the Land . As •a watershed becomes <br /> developed the amount of impervious surface increases causing' <br /> a decrease in soil absorption of stormwater runoff and an <br /> increase in direct runoff to streams and other water bodies <br /> resulting in an increase in potential water pollution . <br /> In order to promote infiltration of stormwater runoff into <br /> the soil and to minimize direct end immediate runoff into <br /> Streams and water supply impoundments, impervious surface <br /> ratios shall be required as provided in the Table of <br /> Impervious Surface Ratios Section 6.23.4. Impervious <br /> Surface calculations for an individual development shall be <br /> cumulative for original construction and any subsequent <br /> 4w additions and calculations of impervious surface coverage <br /> for individual Lots shall include that portion of a right- <br /> ' oaf way between the center line of the street and the <br /> abutting property line of the Lot . <br /> • <br /> EXISTING ORDINANCE PROVISION(S) : <br /> 6.23.4 ,Maximum Impervious Surface Ratios—Gross Land Area <br /> (SEE ATTACHED TABLE A) <br /> PROPOSED ORDINANE AMENDMENT(S) : <br /> � - I <br /> 6.23.4 Maximum impervious Surface Ratios <br /> [SEE ATTACHED TABLE BI <br /> EXISTING ORDINANCE PROVISION(SI : <br /> 6.23.7 Infiltration of the First 1 2 Inch of Rune f f om Impervious <br /> Surfaces( <br /> II <br /> Stormwater• runoff carries Large amounts of oil, nutrients, metals, <br /> baeterialand other pollutants. The ability of stormwater runoff is <br /> closely associated with the Land use from which it originates . The <br /> most significant factor is the increase of impervious surfaces <br /> which prevent the natural infiltration of water in to the soil. <br /> Most of the pollutant concentration is carried in the "first ftusi" <br /> of runoff. To control this pollutant toad within the Water Quality <br /> CriticallAreas the first half—inch of runoff from all impervious <br /> surfaces ! in new developments shall be infiltrated on—site. <br /> Developers shall . be required to submit documentation which <br /> indicates compliance with the specified standard. <br /> 1 <br />