15.14.330 Water quality, storm water and nonpoint pollution

15.14.330 Water quality, storm water and nonpoint pollution.

1. Do Not Degrade Waters. The location, construction, operation, and maintenance of all shoreline uses and developments should maintain or enhance the quantity and quality of surface and ground water over the long term.

2. Assess and Mitigate Storm Water Impacts. New developments or expansions or retrofits of existing development should assess the effects of additional storm water runoff volumes and velocities and mitigate potential adverse effects on shorelines through design and implementation of appropriate storm water management facilities.

3. Low Impact Development. Low impact development (LID) techniques should be considered and implemented to the greatest extent practicable throughout the various stages of development including site assessment, planning and design, vegetation conservation, site preparation (including the avoidance of soil disturbance), and retrofitting and built-out management techniques.

4. Minimize Need for Chemical Applications. Shoreline use and development, including invasive or noxious weed control, should minimize the need for chemical fertilizers, pesticides or other similar chemical treatments to prevent contamination of surface and ground water and/or soils and adverse effects on shoreline ecological functions and values.

5. Existing Development. For existing development, implementation of management plans that minimize or avoid the need for chemical treatments of vegetation in shoreline buffers is encouraged.

1. Do Not Degrade Waters. Shoreline use and development shall incorporate measures to protect and maintain surface and ground water quantity and quality in accordance with all applicable laws.

a. New development shall provide storm water management facilities designed, constructed, and maintained in accordance with the current storm water management manual in effect at the time, including the use of best management practices. Deviations from these standards may be approved where it can be demonstrated that off-site facilities would provide better treatment, or where common retention, detention and/or water quality facilities meeting such standards have been approved as part of a comprehensive storm water management plan;

b. Additionally, new development shall implement LID techniques where feasible and necessary to fully implement the core elements of the storm water management manual.

3. Maintenance of Storm Drainage Facilities. Maintenance of storm drainage facilities on private property shall be the responsibility of the property owner(s). This responsibility and the provision for maintenance shall be clearly stated on any recorded subdivision, short plat, or binding site plan map, building permit, property conveyance documents, maintenance agreements and/or improvement plans.

4. Use BMPs. Best management practices (BMPs) for control of erosion and sedimentation shall be implemented for all development in shoreline jurisdiction through an approved temporary erosion and sediment control (TESC) plan.

5. Public Storm Water Systems. Existing public storm water management systems and facilities shall be retrofitted and improved to incorporate LID techniques whenever feasible.

6. Sewage Management. To avoid water quality degradation by malfunctioning or failing septic systems located within shoreline jurisdiction, on-site sewage systems shall be located and designed to meet all applicable water quality, utility, and health standards. On-site septic systems shall be located landward of structures and as far from the shoreline as possible, unless site conditions preclude this.

7. Materials Requirements. All materials that may come in contact with water shall be constructed of materials, such as untreated wood, concrete, approved plastic composites or steel, that will not adversely affect water quality or aquatic plants or animals. Materials used for decking or other structural components shall be approved by applicable state agencies for contact with water to avoid discharge of pollutants from wave splash, rain, or runoff. Wood treated with creosote, copper chromium arsenic, or pentachlorophenol is prohibited in shoreline waterbodies. [Ord. 580 Att. A § 4.6, 2019.]