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consult other sources as needed to perform the delineation. The delineation of the Director of Planning and Zoning shall be considered final and may not be appealed. (c) Where Conflict Arises Over Delineation. Where the applicant has provided a site-specific delineation of the RPA, the Director of Planning and Zoning will verify the accuracy of the boundary delineation. In determining the site-specific RPA boundary, the Director of Planning and Zoning may render adjustments to the applicant's boundary delineation, in accordance with Section 9.1-11. In the event the adjusted boundary delineation is contested by the applicant, the applicant may seek relief in accordance with the provisions of Section 9.1-11. (d) Final Delineation Shown on CBPA Map. When a delineation of a CBPA has been approved or established by the Director of Platming and Zoning, the CBPA Map shall be amended to reflect that delineation. Section 9.140. Performance Standards. (a) Purpose andintent. The performance standards establish the means to minimize erosion and sedimentation potential, reduce land application of nutrients and toxics, and maximize rainwater infiltration. Natural groundcover, especially woody vegetation, is most effective in holding soil in place and preventing site erosion. Indigenous vegetation, with its adaptability to local conditions without the use of harmful fertilizers or pesticides, filters stormwater runoff. Minimizing impervious cover enhances rainwater infiltration and effectively reduces stormwater runoff potential. The purpose and intern of these requirements are also to implement the following objectives: prevent a net increase in nonpoint source pollution from new development; achieve a 10% reduction in nonpoint source pollution from development on previously developed land where the runoff was not treated by one or more water quality best management practices; and achieve a 40% reduction ~n nonpoint source pollution from agricultural uses. (b) General Performance Standards for Development and Redevelopment. (1) Land disturbance shall be limited to the area necessary to provide for the proposed use or development. a. In accordance with an approved site plan, the limits of land disturbance, including clearing or grading shall be by the construction footprint. These limits shall be clearly shown on submitted plans and physically marked on the development site.