16.05.260 Water quality, stormwater, and non-point pollution.
Water quality is affected in numerous ways by human occupation and development of shoreline areas. Typically the increase in impermeable surfaces as a result of development increases stormwater runoff volumes, causing higher peak stormwater discharges at higher velocities that cause scouring and erosion of stream banks. Erosion increases suspended solids concentrations and turbidity in receiving waters, and carries heavy metals, household wastes, excess nutrients, and other pollutants into these waters. Increased nitrogen and phosphorus enrichment results in algal growth that depresses levels of dissolved oxygen in receiving waters. The degradation of water quality adversely impacts wildlife habitat and public health.
(1) All shoreline development, both during and after construction, shall minimize impacts related to surface runoff through control, treatment and release of surface water runoff such that there is no net loss of receiving water quality in the shoreline environment. Control measures include but are not limited to dikes, runoff intercepting ditches, catch basins, settling wet ponds, sedimentation ponds, oil/water separators, filtration systems, grassy swales, planted buffers, and fugitive dust controls.
(2) All shoreline development shall comply with the applicable requirements of the most recent edition of the Adopted Surface Water Design Manual and all applicable City stormwater regulations. The City will also rely on source control standards and other BMPs contained in the most recent versions of the Department of Ecology Stormwater Management Manual for Western Washington and The Low Impact Development Manual: Technical Guidance for Puget Sound.
(3) Shoreline development and uses shall adhere to all required setbacks, buffers and standards for stormwater storage basins and facilities. Low impact stormwater facilities may be allowed within designated shoreline setback areas if the applicant demonstrates compliance with all other regulations, including any applicable critical areas standards.
(4) Property owners with failing septic systems and applicants seeking required building, land use and shoreline permits for a major redevelopment shall be required to connect to the public sewer if such connection can be made within 300 feet of the subject property.
(5) The use of pesticides, herbicides, and fertilizers on lawns shall be prohibited within shoreline buffers. (Ord. 09-19 § 6 (Exh. C))