Ordinance 3168-10 - Laserfiche WebLink

An adopted and implemented basin plan (Minimum Requirement#9) may be used to develop requirements for water quality sensitive areas that are tailored to a specific basin. (11) MINIMUM REQUIREMENT#8: OFF-SITE ANALYSIS AND MITIGATION Where identified in a City-approved Basin Plan or required in the project's SEPA approval, development projects greater than one (1) acre shall conduct an analysis of offsite water quality impacts resulting from the project and shall mitigate these impacts. The analysis shall extend one-fourth of a mile downstream from the project or to a point specified in the projects SEPA approval. The existing or potential impacts to be evaluated and mitigated shall include, at a minimum, but not limited to: (a) excessive sedimentation; (b) streambank erosion; (c) discharges to ground water contributing or recharge zones; (d) violations of water quality standards; and (e) spills and discharges of priority pollutants. (12) MINIMUM REQUIREMENT#9: BASIN PLANNING Adopted and implemented watershed-based basin plans may be used to modify any or all of the Minimum Requirements, provided that the level of protection for surface or ground water achieved by the basin plan will equal or exceed that which would be achieved by the Minimum Requirements in the absence of a basin plan. Basin plans shall evaluate and include, as necessary, retrofitting of BMPs for existing development and/or redevelopment in order to achieve watershed-wide pollutant reduction goals. Standards developed from basin plans shall not modify any of the above requirements until the basin plan is formally adopted and implementation is initiated by the City. Basin plans shall be developed according to WAC 400-12-500. 21