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Exhibit B <br />ORDINANCE Exhibit A - Page 25 of 55 <br />b. Those areas defined as medium risk of landslide hazard in the Dames and Moore <br />Methodology for Inventory, Classification and Designation of Geologically Hazardous <br />Areas, City of Everett, Washington: July 1, 1991, or as revised through best available <br />science, when combined with springs or seeps, immature vegetation, and/or no <br />vegetation: <br />(1) Slopes less than fifteen percent for Qtb, Qw, and Qls geologic units and <br />uncontrolled fill. <br />(2) Slopes of twenty-five percent to forty percent in all other geologic units. <br />c. Any area with all three of the following characteristics: <br />(1) Slopes greater than fifteen percent; and <br />(2) Hillsides intersecting geologic contacts with a relatively permeable <br />sediment overlying a relatively impermeable sediment or bedrock; and <br />(3) Springs, ground water seepage, or saturated soils. <br />d. Any area which has shown movement during the Holocene epoch (from ten <br />thousand years ago to the present) or which is underlain or covered by mass wastage <br />debris of that epoch. <br />e. Any area potentially unstable as a result of rapid stream incision, stream bank <br />erosion or undercutting by wave action. <br />f. Areas of historic failures, including areas of unstable, old and recent landslides or <br />landslide debris within a head scarp, and areas exhibiting geomorphological features <br />indicative of past slope failure, such as hummocky ground, slumps, earthflows, <br />mudflows, etc. <br />g. Any area with a slope of forty percent or steeper and with a vertical relief of fifteen <br />or more feet, except those manmade slopes created under the design and inspection of <br />a geotechnical professional, or slopes composed of consolidated rock. <br />h. Areas that are at risk of landslide due to high seismic hazard. <br />i. Areas that are at risk of landslides or mass movement due to severe erosion hazards. <br />2. Seismic/liquefaction hazard areas: <br />a. Those areas mapped as seismic/liquefaction hazards per the Dames and Moore <br />Methodology for the Inventory, Classification and Designation of Geologically Hazardous <br />Areas, City of Everett, Washington: July 1, 1991, or as revised through best available <br />science.