several times to ensure its proper disinfection. Following the 24-hour
period, no less than 25 ppm chlorine residual shall remain in the system.
The system shall then be flushed with clean water until the residual
chlorine is reduced to less than one part per million. Samples of water in
disinfected containers for bacterial examination will be taken from several
system locations which are approved by the Contracting Officer. Samples
shall be tested for total coliform organisms (coliform bacteria, fecal
coliform, streptococcal, and other bacteria) in accordance with AWWA EWW.
The testing method shall be either the multiple-tube fermentation technique
or the membrane-filter technique. The disinfection shall be repeated until
tests indicate the absence of coliform organisms (zero mean coliform
density per 100 milliliters) in the samples for at least 2 full days. The
system will not be accepted until satisfactory bacteriological results have
been obtained. After successful completion, verify installation of all
sprinklers and plugs and pressure test the system.
3.9
PIPE COLOR CODE MARKING
**************************************************************************
NOTE: Designer will coordinate color code marking
with UFGS-09900 PAINTS AND COATINGS. Color code
marking for piping which are not listed in Table I
of UFGS-09900 will be added to the table.
**************************************************************************
Color code marking of piping shall be as specified in Section 09900 PAINTS
AND COATINGS.
3.10
PRELIMINARY TESTS
The system, including the underground water mains, and the aboveground
piping and system components, shall be tested to assure that equipment and
components function as intended. The underground and aboveground interior
piping systems and attached appurtenances subjected to system working
pressure shall be tested in accordance with NFPA 13 and NFPA 24. Upon
completion of specified tests, the Contractor shall complete certificates
as specified in paragraph SUBMITTALS.
3.10.1
Underground Piping
3.10.1.1
Flushing
Underground piping shall be flushed in accordance with NFPA 24. This
includes the requirement to flush the lead-in connection to the fire
protection system at a flow rate not less that the calculated maximum water
demand rate of the system.
3.10.1.2
Hydrostatic Testing
New underground piping shall be hydrostatically tested in accordance with
NFPA 24. The allowable leakage shall be measured at the specified test
pressure by pumping from a calibrated container. The amount of leakage at
the joints shall not exceed 1.89 liters 2 quarts per hour per 100 gaskets
or joints, regardless of pipe diameter.
SECTION 13930A
Page 30
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