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    SECTION 02675

    DISINFECTION OF WATER DISTRIBUTION SYSTEM

   PART 1 GENERAL

    1.1 SECTION INCLUDES

    A. Disinfection of potable water distribution [and transmission] system.

    B. Testing and reporting results.

    1.2 RELATED SECTIONS

    A. Section 02667 - Site Water Lines.

    B. Section 02671 - Water Well.

    C. Section 15410 - Plumbing Piping: Disinfection of building domestic water piping system.

    1.3 UNIT PRICE - MEASUREMENT AND PAYMENT

    A. Disinfection: By the linear [foot] [________] ([meter] [________]). Includes preparing, disinfecting, testing, and reporting.

    1.4 REFERENCES

    A. AWWA B300 - Standard for Hypochlorites.

    B. AWWA B301 - Standard for Liquid Chlorine.

    C. AWWA B302 - Standard for Ammonium Sulfate.

    D. AWWA B303 - Standard for Sodium Chlorite.

    E. AWWA C651 - Standards for Disinfecting Water Mains.

    1.5 SUBMITTALS FOR INFORMATION

    A. Section 01300 - Submittals: Procedures for submittals.

    B. Test Reports: Indicate results comparative to specified requirements.

    C. Certificate: Certify that cleanliness of water distribution system meets or exceeds [specified requirements.] [________.]

    1.6 PROJECT RECORD DOCUMENTS

    A. Submit under provisions of Section [01700.] [________.]

    B. Disinfection report:

    1. Type and form of disinfectant used.

    2. Date and time of disinfectant injection start and time of completion.

    3. Test locations.

    4. Initial and 24 hour disinfectant residuals (quantity in treated water) in ppm for each outlet tested.

    5. Date and time of flushing start and completion.

    6. Disinfectant residual after flushing in ppm for each outlet tested.

    C. Bacteriological report:

    1. Date issued, project name, and testing laboratory name, address, and telephone number.

    2. Time and date of water sample collection.

    3. Name of person collecting samples.

    4. Test locations.

    5. Initial and 24 hour disinfectant residuals in ppm for each outlet tested.

    6. Coliform bacteria test results for each outlet tested.

    7. Certification that water conforms, or fails to conform, to bacterial standards of [________].

    1.7 QUALITY ASSURANCE

    A. Perform Work in accordance with AWWA C651.

    B. Water Treatment Firm: Company specializing in disinfecting potable water systems specified in this Section with minimum [three] [_______] years [documented] experience.

    C. Testing Firm: Company specializing in [testing] [examining] potable water systems, [certified] [approved] by the State of [________].

    D. Submit bacteriologist's signature and authority associated with testing.

    1.8 REGULATORY REQUIREMENTS

    A. Conform to [applicable] [___________] code or regulation for performing the work of this Section.

    B. Provide certificate of compliance from [authority having jurisdiction] [________] indicating approval of water system.

   PART 2 PRODUCTS

    2.1 DISINFECTION CHEMICALS

    A. Chemicals: [AWWA B300, Hypochlorite,] [AWWA B301, Liquid Chlorine,] [AWWA B302, Ammonium Sulfate,] [and] [AWWA B303, Sodium Chlorite].

   PART 3 EXECUTION

    3.1 EXAMINATION

    A. Verify that piping system [and water well] has been cleaned, inspected [, and pressure tested].

    B. Perform scheduling and disinfecting activity with start-up, testing, adjusting and balancing, demonstration procedures, including coordination with related systems.

    3.2 EXECUTION

    A. Provide and attach required equipment to perform the work of this Section.

    B. [Inject treatment disinfectant] [Introduce treatment] into piping system.

    C. Maintain disinfectant in system for [24] [____] hours.

    D. Flush, circulate, and clean until required cleanliness is achieved; use [municipal] [________] domestic water.

    E. Replace permanent system devices removed for disinfection.

    F. Pressure test system to [____] psi ([____] kPa). Repair leaks and re-test.

    3.3 FIELD QUALITY CONTROL

    A. Section 01400 - Quality Assurance: Field inspection and testing.

    B. Test samples in accordance with [AWWA C651.] [________.]

   END OF SECTION