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The Washington State Department of Transportation Highway Runoff Manual, as determined by the Washington State Department of Ecology to be equivalent to the 2014 Department of Ecology Stormwater Management Manual for Western Washington, may be used to meet the requirements of chapters 30.63A and 30.63B SCC for public road construction projects, subject to approval by the applicable director. (Added by Amended Ord. 10-026, June 9, 2010, Eff date Sept. 30, 2010; Amended by Ord. 15-102, Jan. 11, 2016, Eff date Jan. 22, 2016).