(1) A stormwater site plan is a comprehensive report containing all of the technical information and analysis necessary for the evaluation of a proposed new development or redevelopment project for compliance with the requirements of this chapter.
(2) Prior to any land disturbing activity, the applicant shall submit a stormwater site plan that complies with this section and volume I, chapter 3 of the Drainage Manual. Volumes I through V of the Drainage Manual shall be used to select BMPs. The required procedures for preparing a stormwater pollution prevention plan (SWPPP), a part of the stormwater site plan, and the required content of the SWPPP are described in SCC 30.63A.445, 30.63A.450, and volume II, chapter 3 of the Drainage Manual.
(3) The following types of stormwater site planning work shall be performed by or under the direction of a professional engineer licensed in Washington State:
(a) Stormwater site plans that involve engineering calculations;
(c) Structural source control BMPs; and