33 01 10.58 - Disinfection Of Water Utility Piping Systems.pdf
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- Attached to
- Skytop Lodge Sewage Treatment Plant Improvements Project – Contract : 2026-01- Project Number 005153. 0436
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- Issued by
- Monroe County, Pennsylvania
About this file
This is a technical specification document for the disinfection of water utility piping systems prepared by Herbert, Rowland & Grubic, Inc. for the Skytop Lodge Sewage Treatment Plant Improvements Project (Project Number 005153.0436) in Canadensis, Pennsylvania. The specification outlines requirements for disinfecting potable water distribution system piping following installation and pressure testing. The work includes introducing disinfectant chemicals into the piping system, maintaining the disinfectant for a 24-hour retention period, flushing and circulating until required quality standards are achieved, and replacing permanent system devices that were removed during the disinfection process. A pre-bid conference is scheduled for August 25, 2026 at 10:30 AM at the Skytop Lodge STP facility, with bid opening on September 18, 2026 at 10:00 AM through PennBid. Bid security in the form of a certified check or bid bond must accompany submissions in an amount not less than 10%.
The specification requires contractors to comply with American Water Works Association standards (AWWA B300, B302, B303, and C651) and permits the use of hypochlorite or sodium chlorite as disinfection chemicals, with liquid chlorine explicitly prohibited. Contractors must submit detailed disinfection procedures including chemical type and required quantities, product data, manufacturer certifications, and field quality control test results demonstrating compliance with authority standards. Final disinfection reports must document chemical type and form, injection timing, test locations, sample collection personnel, initial and 24-hour disinfectant residuals in ppm at each outlet, flushing timing, and post-flushing residual levels. Chlorinated water must be legally disposed of or neutralized with appropriate chemicals before discharge to prevent environmental damage. Final certification of disinfectant levels meeting authority jurisdiction standards must be obtained before the pipeline is connected to existing systems or placed in service.
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Text version
33 01 10.58 - DISINFECTION OF WATER UTILITY PIPING SYSTEMS
Herbert, Rowland & Grubic, Inc. 33 01 10.58 - 1 005153.0436
SECTION 33 01 10.58 - DISINFECTION OF WATER UTILITY PIPING SYSTEMS
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Disinfection of potable water distribution system.
2. Testing and reporting of results.
B. Related Requirements:
1. Section 33 14 16 - Site Water Utility Distribution Piping: Product and execution requirements for installation and testing of site domestic water distribution piping.
1.2 REFERENCE STANDARDS
A. American Water Works Association:
1. AWWA B300 - Hypochlorites.
2. AWWA B302 - Ammonium Sulfate.
3. AWWA B303 - Sodium Chlorite.
4. AWWA C651 - Disinfecting Water Mains.
1.3 SUBMITTALS
A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.
B. Disinfection Procedure:
1. Submit description of procedure, including type of disinfectant and calculations indicating quantities of disinfectants required to produce specified chlorine concentration.
C. Product Data: Submit manufacturer information for proposed chemicals and treatment doses.
D. Manufacturer's Certificate: Certify that products meet or exceed specified requirements.
E. Certify that final water complies with disinfectant quality standards of authority having jurisdiction.
F. Test and Evaluation Reports: Indicate testing results comparative to specified requirements.
G. Field Quality-Control Submittals: Indicate results of Contractor-furnished tests and inspections.
1.4 CLOSEOUT SUBMITTALS
A. Section 01 77 00 - Closeout Procedures: Requirements for submittals.
Herbert, Rowland & Grubic, Inc. 33 01 10.58 - 2 005153.0436
B. Disinfection Report:
1. Type and form of disinfectant used.
2. Date and time of disinfectant injection start and completion.
3. Test locations.
4. Name of person collecting samples.
5. Initial and 24-hour disinfectant residuals in treated water in ppm for each outlet tested.
6. Date and time of flushing start and completion.
7. Disinfectant residual after flushing in ppm for each outlet tested.
1.5 QUALITY ASSURANCE
A. Perform Work according to AWWA C651.
B. Maintain a copy of each standard affecting Work of this Section on Site.
PART 2 - PRODUCTS
2.1 DISINFECTION CHEMICALS
A. Chemicals:
1. Hypochlorite: Comply with AWWA B300.
2. Sodium Chlorite: Comply with AWWA B303.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Section 01 73 00 - Execution Requirements: Requirements for installation examination.
B. Verify that piping system has been cleaned, inspected, and pressure tested.
C. Verify that access fittings have been installed under Section 33 14 16 - Site Water Utility Distribution Piping.
D. Perform scheduling and disinfecting activity with startup, water pressure testing, adjusting and balancing, and demonstration procedures, including coordination with related systems.
3.2 INSTALLATION
A. Provide required equipment to perform Work of this Section.
B. Introduce treatment into piping system.
C. Maintain disinfectant in system for 24 hours.
D. Flush, circulate, and clean until required disinfectant quality standard has been achieved using municipal domestic water.
E. Replace permanent system devices that were removed for disinfection.
Herbert, Rowland & Grubic, Inc. 33 01 10.58 - 3 005153.0436
3.3 FIELD QUALITY CONTROL
A. Section 01 40 00 - Quality Requirements: Requirements for inspecting and testing.
B. Disinfection, Flushing, and Sampling:
1. Disinfect pipeline installation according to AWWA C651.
2. Use of liquid chlorine is not permitted.
3. Upon completion of retention period required for disinfection, flush pipeline until chlorine concentration in water leaving pipeline is no higher than that generally prevailing in existing system or is acceptable for domestic use.
4. Disposal:
a. Legally dispose of chlorinated water.
b. If chlorinated discharge may cause damage to environment, apply neutralizing chemical to chlorinated water to neutralize chlorine residual remaining in water.
5. After final flushing and before pipeline is connected to existing system or placed in service, certify that disinfectant level meets quality standards of authority having jurisdiction.
END OF SECTION
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