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Section 9.1-10. Performance Standards. (b) General Performance Standards for Development and Redevelopment in Chesapeake Bay Preservation Areas: (3) Land development shall minimize impervious cover to promote infiltration of stormwater into the ground consistent with the use or development permitted. 4. That Section 9.1-13(a) of the Code of the City of Portsmouth, Virginia, 1988, be amended to read as follows: Section 9.1-13. Exemptions. (a) Exemptions for Utilities, Railroads, and Public Roads. Construction, installation, operation and maintenance of electric, water, sewer, gas, telephone transmission lines, railroads, and public roads and their appurtenant structures in accordance with (i) regulations promulgated pursuant to the Erosion and Sediment Control Law (10.1-560 et seq., of the Code of Virginia) and the Stormwater Management Act (Sections 10.1-603.1 et seq., of the Code of Virginia), (ii) an erosion and sediment control plan and stormwater manaqement plan approved by the Virginia Department of Conservation and Recreation, or (iii) local water quality protection criteria at least as stringent as the above state requirements, will be deemed to constitute compliance with these regulations. The exemption of utilities, railroads, and public roads is further conditioned on the following: (1) To the degree possible, ~the location of such utilities and facilities shall be outside RPAs; (2) No more land shall be disturbed than is necessary to provide for the desired utility installation; (3) Ail construction, installation and maintenance of such utilities and facilities shall be in compliance with all applicable state and federal requirements and permits and designed and conducted in a manner that protects water quality; and (4) Any land disturbance exceeding an area of two thousand five hundred (2,500) square feet complies with all city erosion and sediment control requirements.