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Method Statement: Installation of Underground uPVC/HDPE Gravity Drainage Networks inspection and test plan example.

Inspection and Test Plan for Method Statement: Installation of Underground uPVC/HDPE Gravity Drainage Networks

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

Published 17 Jul 2026 Rev. 00 1 views
About this ITP: Defines hold and witness points, inspections, and records for underground uPVC/HDPE drainage installation from excavation to final testing and as-builts.

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.

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 ensure all construction and testing stages comply with standards and project specs, with traceable inspections and records.

Who uses this inspection and test plan

Contractor QA/QC, Site Engineer, HSE, Independent Test Agency, and the Engineer/Client Representative.

When this ITP is prepared and submitted

From pre-start permitting through materials receipt, trenching, installation, testing, CCTV, and handover.

Who receives or approves this ITP

Engineer/Client Representative for review and approval.

Inspection scope

Permits, materials, excavation/support, bedding, pipe laying/jointing, manhole connections, backfilling/compaction, leakage/deflection tests, CCTV, as-builts.

Typical hold, witness, and review points

Hold: Permit to Dig, formation approval, manhole connections, leakage test. Witness: bedding placement, pipe jointing, compaction tests, CCTV.

Typical inspection records

Permits, delivery inspections, IRs, weld logs, calibration certs, density reports, EN 1610 test certificates, CCTV reports, as-built drawings.

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.

Inspection and test plan

Activity Inspection / Test Acceptance Criteria Responsibility Record
Permits and pre-start checks Permit to Dig, TMP, TWD approvals All approvals in place and valid; briefings completed PM / HSE / QA-QC Approved permits, TBT records
Materials receipt (pipes, gaskets, cement) Visual, documentation review Compliant markings; no damage; valid certs/shelf life QA-QC MIR, delivery photos
Survey setting out Level/line checks Within stated tolerances Site Engineer / Surveyor Set-out records
Excavation and trench support Dimensions and shoring inspection Trench width/depth per design; shoring installed per TWD Foreman / HSE IR, photos
Formation approval Visual/proof roll Firm, level, corrected soft spots QA-QC / Engineer IR
Bedding installation Thickness and level check ≥100 mm, level within ±10 mm, correct material QA-QC / Site Engineer IR
Pipe laying and jointing (uPVC push-fit) Insertion depth, gasket condition Fully homed; no gasket damage; alignment acceptable QA-QC / Foreman Checklist
uPVC solvent weld joints (if used) Visual; cure verification Uniform bead; cure time observed QA-QC Joint log
HDPE fusion joints Weld log, bead profile, equipment calibration Within ISO 21307/ASTM F2620 parameters; acceptable bead Fusion Technician / QA-QC Weld reports, calibration certs
Manhole connections Visual, flexible connector fit Watertight; correct alignment and rocker pipes QA-QC / Engineer IR, photos
Initial surround/sidefill Placement/compaction observation Uniform support; cover ≥150–300 mm above crown QA-QC Checklist
Backfill compaction (non-traffic) Field density tests (ASTM D6938) ≥95% MDD (ASTM D698) [Verify] QA-QC / 3rd Party Lab Density reports
Backfill compaction (traffic areas) Field density tests (ASTM D6938) ≥98% MDD (ASTM D1557) [Verify] QA-QC / 3rd Party Lab Density reports
Leakage test (air/water) EN 1610 test procedure Leakage/time limits per EN 1610 [Verify] QA-QC / Specialist Test certificates
Deflection test (flexible pipes) Mandrel/deflectometer ≤5% deflection [Verify] QA-QC / Specialist Test report
CCTV inspection CCTV per WRC MSCC/PACP No defects outside acceptance class; clear coding/report Specialist / QA-QC CCTV report/video
As-built survey Survey verification Coordinates/inverts within tolerance; drawings updated Surveyor / QA-QC As-built drawings/CSV

This table is a read-only public reference. Download the PDF or Excel version, or customize this ITP to edit it for your project.

Frequently asked questions

No. CCTV does not prove watertightness. Leakage testing per EN 1610 (air or water) is typically mandatory unless the specification explicitly waives it.

After initial backfilling and a stabilization period (often up to 30 days) or as directed by the Engineer, to capture realistic soil-pipe interaction conditions.

Bundle activities and provide 24–48 hours’ notice to the Engineer. Where unavoidable, provisional witness may be replaced by documented evidence with Engineer consent [Verify per contract].

Related method statement

This Inspection and Test Plan is associated with the Method Statement: Installation of Underground uPVC/HDPE Gravity Drainage Networks method statement, which describes the step-by-step construction sequence, resources, materials, equipment, safety controls, and environmental controls for this activity.

View the Method Statement: Installation of Underground uPVC/HDPE Gravity Drainage Networks method statement →

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