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1 0 4'i <br /> 4 <br /> L • <br /> ARTICLE- 6 APPLICATION OF DIMENSIONAL REQUIREMENTS <br /> ISSUE: In the period of time following the approval of <br /> theIWater Quality Critical Area and Protected <br /> Watershed II Zoning Ordinance text amendments, the <br /> staff has monitored the administration of these <br /> standards end has identified specific concerns to be <br /> addressed. These concerns have tracked similar <br /> • 1 <br /> concerns raised by members of the Board of <br /> • Commissioners and by other Local government staffs <br /> • attempting to implement the State—Local Action Guide— <br /> Lines for the Falls of the Neuse and Jordan <br /> watersheds. Specifically, these concerns include the <br /> complexity of the Impervious Surface Ratios Table as <br /> opposed to the three—tiered approach endorsed by the <br /> TJCOG and the State of North Carolina ; the Lack of <br /> recognition in the Table of areas already serviced by <br /> public water and sewer services and developed at <br /> higher densities given the provision of these <br /> services; the technical difficulties posed by a <br /> standard of stormwater management which relies solely <br /> on linfiltration , and the need to establish an <br /> acceptable guideline for immplementetion of the <br /> infiltration standard by type of lend use, <br /> particularly large Lot development . <br /> EXISTING ORDIINANCE PROVISION(S) : <br /> Article 6 APPLICATION OF DIMENSIONAL REQUIREMENTS <br /> Article 6 .23.4 Impervious Surface Regulated in <br /> Protected Watersheds <br /> An impervious surface is any surface <br /> through which water cannot penetrate <br /> or can only penetrate slowly. This <br /> would include paved streets and <br /> parking Lots, concrete sidewalks and <br /> structures which cover land . As a <br /> watershed becomes developed, the <br /> amount of impervious surface <br /> increases causeing a decrease in soil <br /> absorption of stormwater and an <br /> increase in direct runoff to streams <br /> with a resulting increase in <br /> potential water pollution . <br /> In order to promote infiltration of <br /> stormwater into the maximum soil and <br /> minimize direct and immediate runoff <br /> into streams, impervious surface <br /> ratios shall be required in the <br /> Protected Watershed II IPW—III <br /> District . <br />