THE CORPORATION OF THE
CITY OF PORT COQUITLAM

MEMORANDUM
TO: B.R. Kirk, March 30, 1989

City Administrator

FROM: T.M. Chong, P. Eng.,
City Engineer

SUBJECT: Request to Eliminate Check Valves
(Public Works Committee Meeting March 28, 1989)

RECOMMENDATION :

BACKGROUND AND COMMENTS:

The attached letter from Mr. Beedie provides the background to his request
to waive the requirement of installing check vaives on 150 mm water
connections servicing his industrial lots. This requirement is currently
Stated in the Subdivision Servicing Bylaw.

The rationale for the check Valve requirement is that the City has little
Or no jurisdiction to continually inspect or control the operation or
Maintence of the plumbing system inside the property line. The only
Opportunity the City has to exercise some control inside the property is at
the initial Pbuilding stage. Mr. Chernoff advises that for all new
installations the Building Department would assess the risk of a cross
connection and then determine whether a back-flow preventor is needed or not.
Generally speaking, these back~flow preventor devices are intended to separate
the domestic from the non-domestic (ie. sprinkler
the building. As such they do not necessarily of
preventing contaminated water Originating
Siphoned into the City's water system. The
not far-fetched as can be illustrated
examples of contaminated water working i
system. The Building Department further
existing industries after the occu
the owner voluntarily requests
inspected. Recognizing this ap
over the on-site plumbing contamination of the City's
water system, ¢ : °

j all check valve

water connections 100 mm and larger (ie. connections servicing
industrial development and fire lines). The attached City drawing no. 207
reflects this requirement.

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