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2.4 Assumptions Related to Recommended Mitigation Measures <br /> 1. Improvements to some transportation facilities may present serious environmental challenges as <br /> identified in the EIS. In some cases, such as Mukilteo Blvd., these areas are identified as <br /> constrained due to prior decisions related to environmental conditions. These corridors are not <br /> proposed for construction. <br /> 2. Some transportation facilities require further analysis. These include extensions to 112th St. and 4th <br /> Ave. The environmental issues related to such projects must be resolved in separate environmental <br /> analyses. Substitute projects for these planned system improvements may result from such <br /> environmental analyses. <br /> 3. Some corridor improvements are both deferred until after 2012 and flagged for considerably more <br /> intense study. (The analysis assumes these improvements will not exist.) An example is the <br /> extension of Paine Field Blvd. to the waterfront. <br /> 4. The mitigation strategy for transportation features projects that produce greater efficiency in the <br /> transportation system and result in reduced emissions from mobile sources. The expansion of <br /> person capacity (achieving greater numbers of persons per vehicle), the encouragement of demand <br /> management (reducing the demand for vehicles), and the promotion of non-motorized alternatives <br /> (such as walking or bicycling) are included in the strategy. <br /> 5. Improvements to vehicular circulation that reduce the amount of "stopped delay" -- the primary <br /> contributor to mobile pollution -- are promoted. These improvements have assumed continuation <br /> of existing federal, state, and City funding levels. <br /> 6. Expansion of the person-carrying capacity of the transportation system, promotion of demand <br /> management programs among employers, and the establishment of facilities that permit easier use of <br /> non-motorized alternatives all contribute toward lower consumption of energy resources. <br /> Section 3: EARTH/GEOLOGICALLY HAZARDOUS AREAS <br /> 3.1 Threshold <br /> All slopes that are not designated environmentally sensitive may be modified. Major cuts and fills will <br /> likely occur to make sites suitable for development. <br /> Sites that are designated environmentally sensitive may be modified only in compliance with <br /> environmentally sensitive areas regulations. Disturbance of environmentally sensitive areas to <br /> construct necessary utilities will be limited to the minimum necessary for construction. <br /> Sites designated as geologically hazardous areas may be modified if approved by the Planning Director <br /> based upon review of a geotechnical report that shows the proposal meets the criteria of Section 37 of <br /> the Zoning Code. The report must show that the modifications will not create a hazard to the subject <br /> property or surrounding properties. <br /> 13 <br />