(A) Evaluation according to contents of design manual. All storm water control measures and storm water treatment practices (also referred to as best management practices or BMPs) required under this chapter shall be evaluated by the Storm Water Administrator according to the policies, criteria and information, including technical specifications and standards and the specific design criteria for each storm water practice, in the design manual. The Storm Water Administrator shall determine whether proposed BMPs will be adequate to meet the requirements of this chapter.
(B) Determination of adequacy; presumptions and alternatives. Storm water treatment practices that are designed, constructed and maintained in accordance with the criteria and specifications in the design manual will be presumed to meet the minimum water quality and quantity performance standards of this chapter. Whenever an applicant proposes to utilize a practice or practices not designed and constructed in accordance with the criteria and specifications in the design manual, the applicant shall have the burden of demonstrating that the practice(s) will satisfy the minimum water quality and quantity performance standards of this chapter. The Storm Water Administrator may require the applicant to provide the documentation, calculations and examples necessary for the Storm Water Administrator to determine whether such an affirmative showing is made.
(C) Separation from seasonal high water table. For BMPs that require a separation from the seasonal high-water table, the separation shall be provided by at least 12 inches of naturally occurring soil above the seasonal high-water table.
(Ord. 14-O-312, passed 7-14-2014)