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Article 6: Development Standards 116 <br /> Section 6.15:Soil Erosion and Sedimentation Contro1268F <br /> (ii) Larger areas may be uncovered within the boundaries of the <br /> tract with the written approval of--by-the Director of the Dk4sien of <br /> Resources—t-The Division of Energy, Mineral, and Land <br /> Resources (DEMLR), upon the applicant providing engineering <br /> justification with a construction sequence that considers phasing <br /> limiting exposure, submission of weekly self-inspection reports, <br /> and more conservative design than the 25-year storm. The <br /> Director of DEMLR may also stipulate the inclusion of other <br /> conditions in the plan as necessary based on specific site <br /> conditions-314 <br /> (b) Erosion and Sedimentation Controls <br /> (i) Erosion and sedimentation control measures, structures, and <br /> devices within HQW zones shall be so planned, designed, and <br /> constructed to provide protection from the stormwater runoff of <br /> the 25-year storm which produces the maximum peak rate of <br /> stormwater runoff. <br /> (ii) The peak rate of stormwatel runoff shall be calculated according <br /> to procedures in the latest edition of the United States <br /> Department of Agriculture Natural Resources&DU Conservation <br /> Service's "National Engineering Field Mariial Handbook 630 for <br /> Conservation Practices"or according to other calculation <br /> procedures acceptable to the Erosion Control Officer <br /> anv other aoenov of this state or the I IAitQd Ctatec or env <br /> generally reGognized organization or <br /> (c) Sediment PondS315 <br /> M Sediment ponds (also called "sediment basins")w4hin HQW <br /> zones shall be planned, designed, and constructed to meet the <br /> following criteria: <br /> a. Use a surface withdrawal mechanism, except when the <br /> basin drainage area is less than 1.0 acre: <br /> b. Have a minimum of 1,800 cubic feet of storage area per <br /> acre of disturbed area: <br /> C. Have a minimum surface area of 325 square feet per cfs <br /> of Q25 peak inflow: <br /> d. Have a minimum dewatering time of 48 hours: and <br /> e. Incorporate 3 baffles, unless the basin is less than 20 <br /> feet in length, in which case 2 baffles shall be sufficient. <br /> a Ql lrh that the PGAd ;vill hW.o a cettli% effirienry of at <br /> IQAst 0 <br /> that 2-year storm whiGh PMCII-199-93 thQ_ Maximum peak <br /> rAW Of <br /> 114 Correctionof entity name andadditionofinformationfrom 15A NCAC Chapter4. <br /> 315 Revised to reflect current standards within 15ANCAC Chapter 4. <br /> Orange County, North Carolina- Unified Development Ordinance Page 6-126 <br />