final bid specs 09328.pdf - Freese and Nichols, Inc.

D. Compressed Air Piping: Unless otherwise directed by the authority having jurisdiction, flush
piping with air until air flows clear for a minimum of 60 seconds per 100 linear feet of piping
being flushed at 25 CFM per 1 inch diameter of pipe.
E. All strainers and filters shall be cleaned and replaced prior to start-up.
3.06 DISINFECTION OF DOMESTIC WATER PIPING SYSTEM
A. Prior to starting work, verify system is complete, flushed and clean.
B. Inject disinfectant, free chlorine in liquid, powder, tablet or gas form, throughout system to
obtain 50 to 80 mg/L residual.
C. Bleed water from outlets to ensure distribution and test for disinfectant residual at minimum 5
remote outlets.
D. Maintain disinfectant in system for 24 hours.
E. Flush disinfectant from system until residual equal to that of incoming water or 1.0 mg/L.
F. Take samples no sooner than 24 hours after flushing, from 5 remote outlets and from water
entry, and analyze in accordance with AWWA C601.
G. Disinfection and disinfection procedures shall be witnessed and approved by the Owners
Representative.
H. After disinfection is completed, submit "Disinfection Certificate of Approval" for domestic
water piping systems to the Owners Representative stating that all test results are
satisfactory. Certificate of Approval must be signed by Contractor, Testing Laboratory.
Certificate shall show the date, time and residual of each of the following tests:
1. Initial disinfection residual (50 PPM minimum) - 5 samples.
2. Final disinfection residual (25 PPM minimum) - 5 samples.
3. After flushing residual (5 PPM maximum) - 5 samples.
4. Analyze in accordance AWWA C601 - 5 samples.
3.07 CLOSING IN UNINSPECTED WORK
Do not cover up or enclose work until it has been properly and completely inspected and
approved. Should any of the work be covered up or enclosed prior to all required inspections and
approvals, uncover the work as required. After it has been completely inspected and approved,
make all repairs and replacements as necessary to the satisfaction of the Owner’s representative.
Repairs and replacements shall be at no additional cost to the Owner.
END OF SECTION
Plumbing Systems 15400-18
DPR09328