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Figure 11-4.1.8 Prefabricated Concrete Washout Container w/Ramp <br />DEPARTMENT OF <br />ECOLOGY <br />State of Washington <br />NOT TO SCALE <br />Figure 11-4.1.8 <br />Prefabricated Concrete Washout Container <br />w/Ramp <br />Revised June 2015 <br />Please see http://www.ecy.we.gov/copyright.html for copyright notice including permissions, <br />limitation of liability, and disclaimer. <br />2014 Stormwater Management Manual for Westem Washington <br />Volume 11- Chapter 4 - Page 324 <br />