(A) It is recognized that developed areas, as compared to undeveloped areas, generally have increased imperviousness, decreased infiltration rates, increased runoff rates, and increased concentrations of pollutants such as fertilizers, herbicides, greases, oil, salts and other pollutants. As new development and re-development continues within the corporate boundaries of the city, measures must be taken to intercept and filter pollutants from stormwater runoff prior to reaching regional creeks, streams, and rivers. Through the use of appropriate Best Management Practices (BMPs), to treat the Water Quality Volume (WQv) or the Water Quality Flow (Qwq) stormwater runoff will be filtered, and harmful amounts of sediment, nutrients, and contaminants will be removed.
(B) The project site owner must submit to the city a stormwater pollution prevention plan (SWPPP) that shows placement of appropriate BMP(s) from a pre-approved list of BMPs specified in the City of Washington Stormwater Technical Standards Manual. The SWPPP submittal shall include an Operation and Maintenance Manual for all post-construction BMP(s) included in the project and a notarized maintenance agreement, consistent with the sample agreement provided in the City of Washington Stormwater Technical Standards Manual, providing for the long-term maintenance of those BMPs, both of which shall be recorded with the deed for the property on which the project is located. The noted BMP(s) must be designed, constructed, and maintained according to guidelines provided or referenced in the City of Washington Stormwater Technical Standards Manual. Practices other than those specified in the pre-approved list may be utilized. However, the burden of proof, as to whether the performance and ease of maintenance of such practices will be according to guidelines provided in the City of Washington Stormwater Technical Standards Manual, would be placed with the applicant. Details regarding the procedures and criteria for consideration of acceptance of such BMPs are provided in the City of Washington Stormwater Technical Standards Manual.
(C) Gasoline outlets and refueling areas must install appropriate practices (as noted under “Hot Spots” provision in the Technical Standards) to reduce lead, copper, zinc, and polyaromatic hydrocarbons in stormwater runoff. These requirements will apply to all new facilities and existing facilities that replace their tanks, regardless of the size of the facility.
(Ord. 10-2024, passed 7-8-2024)