vinyl system.
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[A prime coat at least 0.076 mm 3.0 mil thick and a [white] [_____] final
coat at least 0.127 mm 5.0 mil thick shall be applied. Each coat shall be
a two-component catalyzed epoxy in accordance with DOD-C-24654. The primer
shall contrast with the color of the finish coat.] [Four coats, each at
least 0.038 mm 1.5 mil thick, of VR-3 vinyl resin paint in accordance with
BOR Paint Mnl shall be applied. The second, third, and fourth coats shall
be of contrasting colors.]
3.8.3
Bolted Tanks
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NOTE: If the tank constitutes an obstruction to air
navigation, the paint system applied to the outside
of the tank shall be an international orange and
white checkerboard pattern. Galvanized coatings
shall be disallowed when the stored water is
corrosive.
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The tanks shall have a coating applied to both the interior and exterior
surfaces in accordance with Section 10 of AWWA D103. Color shall be [as
indicated on the drawings] [as approved] [_____].
3.9
DISINFECTION
The [elevated tank] [standpipe] [reservoir] and connecting lines thereto
shall be disinfected with chlorine before being placed in operation.
3.9.1
Tank
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NOTE: In areas subject to regulations which are
more stringent than requirements contained in AWWA
C652, the local requirement will apply and will be
specified.
AWWA C652 covers three methods for disinfection.
Typically, only one method will be used for a given
storage facility disinfection, but combinations of
the methods may be used. The three methods are:
1. Chlorination of the full storage facility such
that the end of the appropriate retention period the
water will have a free chlorine residual of not less
than 10 mg/L.
2. Spraying or painting of all storage facility
water contact surfaces with a solution of 200 mg/L
available chlorine.
3. Chlorination of full storage facility with water
having a free chlorine residual of 2 mg/L after 24
hr.
This paragraph is mandatory for all PACNAVFACENGCOM
projects. All other agencies may use it after
SECTION 13209
Page 20
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