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�hr Washinqto�i Stalr Dcpartment of Health (DOH) cross connection regulations require water <br /> purveyors, suc�i as Fveretl, to maintain safe drinking water by taking precautions to ensure that fire <br /> �;rotection wa�er in both a�mmercial and residential sprinkler systems dces not backFlow into Ihe public <br /> system. In the past, single check valves were considered as an adequate backFlow device for commercial <br /> properties. However, DOH has delermined that double check detector assemblies (DCDA) are the <br /> mmimum acceptable b�.ckflow protedion device (or commercial fire protection systems. Some <br /> commercial buildin9s in Everett stlll have sin9le check-valves Installed, which now must be upgreded to a <br /> DCDA for mmmerr:ial fire services when new construdion fs planned [hat will affect fire services. Thi; <br /> aAditional proter�ion is necetisary to adhere to DCH regulations and ensure safe drmking water. <br /> Sincerely, <br /> � � �n <br /> '41'\.r.r-� �,n-�� <br /> �.__--._� <br /> Tim Markham, WQCO <br /> Cro,s Connecti�n Specialisl <br /> cc Permit Services Manager Paul McKee, Assistanl Fire Marshal Jim Venturo, Utili[ies Remrds Managc�r <br /> Verl Sly, Meq lialey <br /> i.I I\' OI EVFRFTT • 3200 Cedar Street • Everetl WA 98201 • �425� 257-8800 • Fax (425) 257-8882 <br />