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The Washington State Department of Health (DOH) cross connection regulations require water <br />purveyors, such as Everelt, to maintain safe drinking water by taking precautions to ensure thaY fire <br />protedion water in both commercial and residential sprinkler systems does not backflow inro the public <br />system. In the past, sinyle check valves were considered as an adequate backflow device for commercial <br />properties. However, DOH has determined that double check detector assemblies (DCDA) are fhe <br />minimum acceptable backflow protedion device for commercial fire protedion systems. Some <br />commercial buildings in Everett sCili have single check-valves installed, which now must be upgraded to a <br />DCDA for commercial fire services when new construction is planned that will affect fire services. This <br />additional protedion is necessary to adhere to DUH regulalions and ensure safe drinking water. <br />Sincerely, <br />� �h� n r-�- <br />�— <br />Tim Markham, WQCO <br />Cross Conneclion Specialist <br />cc: Permit Services Manager Paul McKee, Assistant Fire Marshal Jim Venturo, Utilities Records Manager <br />Verl Sly, Meg Haley <br />�:bJ#�40 d�`£I%���4 <br />CITY OF EV[RETi' • 3200 Cedar Street • F_verett, WA 98201 •(425) 257-8800 • Fax (425) 257-8882 <br />