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ii. Skimmers must dewater from the surface within 24 to 72 hours, and the <br />orifice size of the slciminer must be correctly sized to obtain the <br />appropriate discharge rate. <br />iii. Supporting engineering calculations will be submitted with the erosion <br />control plan. <br />c. Compliance with erosion control requirements will be performance based. The <br />developer will install and maintain devices to adequately maintain sediment on- <br />site. Additional controls will be required if off-site sedimentation occurs, even if <br />the site is in compliance with the approved plan, <br />d. The developer shall collaborate with County staff during the erosion control plan <br />design process: To encourage this, a minimum of one (1)pre-application meeting <br />with erosion control staff will be conducted prior to submittal of the ECP, and a <br />pre-construction conference will be conducted prior to land disturbance activities, <br />e. The developer shall adhere to the maximum slope grading standards of 3:1 per <br />Orange County regulations. <br />In cases where a different slope is required to adhere to other local and State <br />requirement, most notably NC DOT driveway access requirements, or a flatter <br />slope is deemed more viable to avoid the wholesale grading of the property or <br />removal of significant vegetation, the developer has the ability to observe a <br />maximum slope ratio of 2:1 so long as: <br />i. The developer can demonstrate on a formally submitted site plan as well <br />as within the grading plan that the reduction will be substantially <br />complaint with the overall intent of County grading and erosion control <br />standards and will not create unnecessary interior, or off-site, impacts <br />ii. That .adherence to the established 3:1 slope standard will require <br />excessive grading of the property, <br />iii. That adherence to the established 3:1 slope standards will result in <br />higher velocity stormwater runoff, <br />f. Mnziinize disturbance and phase development wherever practical. <br />g. The developer shall ensure that any grading activity will be conducted in such a <br />manner that existing vegetation, identified as being located withil~ protected <br />buffer al•eas fJ Parker April 29, 2008) will be preserved and maintained on the <br />property <br />h. The developer shall utilize the natural shape of the land with minimal grading to <br />locate features in a way that minimize impacts on and off the site. <br />i. The developer shall adhere to NC DOT maximum slope standards for driveways <br />and access drives of a two percent (2%) minimum to a twelve percent (12%) <br />maximum slope where it can be demonstrated on a site plan and on the grading <br />17 <br />