Ord 2625 - TMC Title 18 Chapters - Critical Areas Regulations

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c. Performance standards for fulfilling environmental goals and objectives and for triggering remedial action or contingency measures. Performance standards may include water quality standards, species richness and diversity targets, habitat diversity indices, creation of fish habitat, or other ecological, geological or hydrological criteria. d. Detailed construction plan of the written specifications and descriptions of mitigation techniques. This plan should include the proposed construction sequence and construction management, and be accompanied by detailed site diagrams and blueprints that are an integral requirement of any development proposal. e. Monitoring and/or evaluation program that outlines the approach for assessing a completed project. At least five years of monitoring is required. An outline shall be included that spells out how the monitoring data will be evaluated by agencies that are tracking the mitigation project's process. For projects that discharge stormwater to a stream, the Director may require water quality monitoring. f. Contingency plan identifi corrective measures to be taken when performance standards have not been met. ,ing potential courses of action and any monitoring or evaluation indicates project g. Performance security or other assurance devices as described in TMC Section 18.45.210. Section 31. TMC Section 18.45.120 is hereby reenacted to read as follows: 18.45.120 Areas of Potential Geologic Instability Designations, Ratings and Buffers A. DESIGNATION. Potential areas of geologic instability include areas of potential erosion and landslide hazards. Areas of potential geologic instability are classified as follows: Class 1 areas, which have a slope of less than 15%; 2. Class 2 areas, which have a slope between 15% and 40%, and which are underlain by relatively permeable soils; 3. Class 3 areas, which include areas sloping between 15% and 40%, and which are underlain by relatively impermeable soils or by bedrock, and which also include all areas sloping more steeply than 40%; 4. Class 4 areas, which include sloping areas with mappable zones of groundwater seepage, and which also include existing mappable landslide deposits regardless of slope. 1. The approximate location, extent, and designation of areas of potential geologic instability are depicted in the City's Critical Areas Map. Actual boundaries and designations shall be determined by a qualified professional on a site -specific basis. MLegislative Development\Critical Areas update 2-25-20 MD:bjs Review and analysis by Barbara Saxton Page 34 of 87