SECTION 02675

DISINFECTION OF WATER DISTRIBUTION SYSTEMS

PART 1 GENERAL

SECTION INCLUDES

Disinfection of potable water distribution [and transmission] system.

Testing and reporting results.

RELATED SECTIONS

Section 02667 - Site Water Lines.

Section 02671 - Water Well.

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

UNIT PRICE - MEASUREMENT AND PAYMENT

Disinfection:

Basis of Measurement: By the linear [foot] [________] ([meter] [________]).

Basis of Payment: Includes preparation, disinfection, testing and reporting.

REFERENCES

ANSI/AWWA B300 - Standard for Hypochlorites.

ANSI/AWWA B301 - Standard for Liquid Chlorine.

ANSI/AWWA B302 - Standard for Ammonium Sulfate.

ANSI/AWWA B303 - Standard for Sodium Chlorite.

ANSI/AWWA C651 - Standards for Disinfecting Water Mains.

SUBMITTALS

Test Reports: Indicate results comparative to specified requirements.

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

PROJECT RECORD DOCUMENTS

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

Disinfection report; record:

Type and form of disinfectant used.

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

Test locations.

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

Date and time of flushing start and completion.

Disinfectant residual after flushing in ppm for each outlet tested.

Bacteriological report; record:

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

Time and date of water sample collection.

Name of person collecting samples.

Test locations.

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

Coliform bacteria test results for each outlet tested.

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

Bacteriologist's signature and authority.

QUALITY ASSURANCE

Perform Work in accordance with ANSI/AWWA C651.

QUALIFICATIONS

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

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

REGULATORY REQUIREMENTS

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

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

PART 2 PRODUCTS

DISINFECTION CHEMICALS

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

PART 3 EXECUTION

EXAMINATION

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

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

EXECUTION

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

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

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

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

Replace permanent system devices removed for disinfection.

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

QUALITY CONTROL

Provide [analysis] [and] [testing] of treated water under provisions of Section [01400.] [________.]

Test samples in accordance with [ANSI/AWWA C651.] [________.]

END OF SECTION