(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 they 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 such documentation, calculations and examples as necessary for the Storm Water Administrator to determine whether such an affirmative showing is made.
(C) Additional standards for special situations; trout waters. In addition to the standards for storm water handling set out in the design manual, development and redevelopment that drains in whole or part to class trout waters shall be designed and implemented using the best storm water practices that do not result in a sustained increase in the receiving water temperature, while still meeting the other requirements of this chapter.
(Ord. passed 1-15-2008)