Method Statement: Chlorination and Disinfection of New Potable Water Mains inspection and test plan example.

Inspection and Test Plan for Method Statement: Chlorination and Disinfection of New Potable Water Mains

Q: How many sampling locations are required?

At minimum, sample at all extremities, dead ends, and representative intervals of long runs. Exact number and spacing must follow the Authority’s sampling plan.

Q: What if the end-of-contact residual is below the minimum?

Repeat chlorination or extend contact time per approved method until the end residual meets or exceeds the specified minimum; then proceed with dechlorination and flushing.

Q: Can tablet or slug methods replace continuous feed?

Yes, if authorized by the project specifications and Authority, following AWWA C651 method-specific requirements and controls.

AI-assisted inspection and test plan connected to a method statement, with PDF and Excel export.

Published 03 Jul 2026 Rev. 00 2 views

Disclaimer: This ITP is provided as a public reference document. Verify all inspection activities, acceptance criteria, and records against your project specifications, applicable standards, and contractual requirements before use. Quollnet accepts no liability for its application on any project.

About this ITP: Defines inspection hold/witness points and records for chlorination, contact time, dechlorination, flushing, and lab testing until acceptance.

More than a static template

Unlike a downloadable Word or PDF template, this ITP is an AI-assisted editable starting point directly connected to its method statement. Every inspection activity, hold point, and acceptance criterion is structured and ready to adapt to your project.

AI-assisted customization — Tailor inspection activities and acceptance criteria to your specific project scope.
Linked method statement — This ITP is connected to the corresponding method statement describing the work sequence.
Multiple export formats — Download as a formatted PDF or editable Excel spreadsheet.
Editable starting point, not a final document — Review and verify all content against your project specifications and standards before use.

Download ITP PDF Formatted ITP document Download ITP Excel Editable ITP spreadsheet Open Method Statement Method statement linked to this ITP

What you can customize

When you save this ITP to your account, every inspection row becomes editable. You can add, remove, or modify:

Inspection activity — Description of what is being inspected.
Inspection type — Hold point (H), Witness point (W), Review (R), or Monitor (M).
Responsibility — Contractor, subcontractor, engineer, or client.
Frequency — How often the inspection occurs.
Acceptance criteria — Referenced standard or specification requirement.
Records — Forms, test reports, or checklists required as evidence.

Why this ITP is used

To control and evidence compliance of disinfection and commissioning of new potable mains against standards and authority requirements.

Who uses this inspection and test plan

Contractor’s QA/QC, Commissioning Engineer, HSE, accredited laboratory, and the Water Authority/Engineer for witness and approval.

When this ITP is prepared and submitted

After pressure testing and cleaning, before tie-in to the live network, throughout chlorination, flushing, and sampling phases.

Who receives or approves this ITP

Engineer/Water Authority for review, witness, and acceptance.

Inspection scope

Preparations, dosing calculations, instrument calibrations, chlorination, contact time monitoring, dechlorination checks, flushing verification, microbiological sampling and analysis, and final approval.

Typical hold, witness, and review points

Start of chlorination; commencement of high-velocity flushing; bacteriological sampling; final approval to connect.

Typical inspection records

Pre-start checklist, dosage calculations, COAs, calibration certificates, monitoring logs, dechlorination logs, sampling forms, lab certificates, approval to connect.

Important approval note

This ITP is an AI-assisted editable starting point, not a pre-approved document. Before use on any project, all inspection activities, hold points, and acceptance criteria must be reviewed and approved by the relevant parties (superintendent, principal contractor, or client representative) in accordance with your contract and project quality plan.

Always verify acceptance criteria against your applicable drawings, specifications, and regulatory requirements. Hold points must be confirmed with the relevant authority before work proceeds past that point.