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The Washington State Departrc�ent of Heal[h (DOH) cross connection regulations require water <br /> purveyors, such as Everett, to maintain safe cirinking water by taking precautions to ensure thzt fire <br /> protection water in both commerciai and residential sprinkler systems does not backFlow into the pubiic <br /> system. In the past, single check valves were considered as an adequate backflow device for commercial <br /> properties. However, DOH has determined that doubie check detector assemblies (DCDA) are the <br /> minimum acceptable backflow protection device for commercial fire protection systems. Some <br /> commercial buiidings in Everett still have single check-valves installed, which now must be upgreded to a <br /> DCDA for wmmercial t�re services when new construccion is planned [hat wil! affect fire services. This <br /> additional protection is necessary to adhere to DOH regulations and ensure safe drinking water. <br /> Sincer.ly, <br /> � �'1�-�r-k-�-�� <br /> Tim Markham, WQCO <br /> Cross Cunnection Specialist <br /> cc: Permit Services Manager Paul McKee, Assistant Fire Marshal ]im Venturo, Utilities Records Manager <br /> Verl Sly, Meg Haley <br /> CITY OF EVE��ETT • 3200 Cedar Street • Everett, WA 9820` • (425) 257-8800 • Fax (425)257-8882 <br /> -. - • , s •.�--ia-s _—�;:�„'�, <br /> . . . . . . � � � tk}� <br /> ... � � . .. � . . � 'a"R+..+F�. � Y J <br /> K � <br /> � __ � � <br /> , . .�- . i.� �'. <br /> .. �..� __✓� ...IS i <br />