1325 SE EVERETT MALL WAY FLYING SQUIRREL 2021-12-22

• From: Thad Newport Sent: Monday,August 2,2021 11:45 AM To: JODIJ@WOLFEFP.COM Cc: Terri Jorgenson;John Bertrand;Tim Markham Subject: K2107-004 1325 SE EVERETT MALL WAY UNIT B4 Hello Jodi, I am doing the Public Works review for the fire sprinkler permit submitted for 1325 SE Everett Mall Way Unit B4(Flying Squirrel Trampoline Park)and our records show the existing backflow device on the fire service is a single check valve in a vault. Anytime a building with an existing single check backflow device applies for a modification to their sprinkler system the backflow device must be brought up to the minimum double check detector check valve assembly. I have copied the section from our Design and Construction Standards and Specifications below. Please apply for a Utility Permit and provide a plan showing the DCDA location and cut sheets for approval.Once we approve the Utility permit for the DCDA we can approve the corresponding Fire Sprinkler permit. If you have any questions on the backflow device requirements please contact Tim Markham who is also copied on this email. His direct phone number is 425-257-8833 as well. 5-3 BACKFLOW PREVENTION All water system connections to serve building or properties with domestic potable water,fire sprinkler systems,or irrigation systems shall comply with the minimum backflow prevention requirements as established by the Washington State Department of Health(DOH)in WAC 246-290-490 and WAC 246- 290-010 and the City of Everett Cross Connection Control Ordinance in Municipal Code 14.20. To prevent contaminated water from the new main from entering the existing distribution system,a Washington State approved double check valve assembly shall be used on the line supplying the water and shall meet the requirements in Section 5-17 of these standards. The double check valve assembly shall be located as approved by the Public Works Director or his designee. A double check valve assembly is sufficient baekflow protection only for filling and flushing of the new main. During the hydrostatic pressure test,the temporary connection between the new main and the existing distribution system shall be removed. For fire and irrigation,the minimum level of backflow prevention required is a state approved double check valve assembly. Fire services shall have a double check detector check valve assembly. Air gaps and reduced pressure backflow assemblies must be Washington State approved and arc required wherever a potential health hazard exists. The Public Works Department has the authority to perform regular inspections on all backflow prevention assemblies connected to the City's water system and shall be provided access to the premises to inspect. The Public Works Director or his designee shall receive a passing certificate from a Washington State certified tester for all backflow prevention assemblies before releasing the certificate of occupancy on any building. A list of approved testers may be obtained from the Public Works Department. Plan approval does not constitute approval of a backflow prevention system. A separate backflow prevention system approval must be obtained from the Public Works Director or his designee prior to initiation of water service.