Advanced Leak Detection Survey Record

Inspection record for instrument-based or mobile advanced leak detection methane surveys, documenting survey scope, instrument sensitivity, detected emissions, and follow-up actions to support a gas leak detection program.

Inspection Details and Survey Scope

• Survey date and start/end time recorded
  Record the date and time the advanced leak detection survey began and ended.
• Survey area, asset ID, and route documented
  Identify the facility, pipeline segment, street route, or asset covered by the survey.
• Survey type matches advanced leak detection program scope
  Select the survey method used for this inspection.
• Weather and operating conditions recorded
  Document wind, temperature, precipitation, traffic, or other conditions that could affect detection performance.

Instrument Verification and Sensitivity

• Instrument ID and model recorded
  Record the methane detection instrument identifier, model, and any attached sensor package.
• Calibration or bump check completed before use
  Verify the instrument was checked according to the applicable SOP before the survey began.
• Verified methane detection sensitivity
  Record the verified detection sensitivity for the survey instrument.
• Instrument zero/span or functional check results
  Document the outcome of pre-survey functional checks, including any drift or adjustment made.

Survey Execution and Coverage

• Survey route or coverage completed as planned
  Confirm the planned route, asset coverage, or scan area was completed.
• Survey speed or dwell time recorded
  Record the vehicle speed, walking speed, or dwell time used during the survey.
• Obstructions or access limitations noted
  Document blocked access, traffic, weather, or other limitations that may have reduced coverage.
• Survey data captured and stored
  Confirm survey data, logs, or telemetry were captured and retained per program requirements.

Detected Emissions and Leak Indications

• Methane readings recorded at detection points
  Enter the highest observed methane concentration at each detection point or the peak reading for the survey.
• Potential leak indication identified
  Indicate whether the survey identified a potential leak or abnormal emission source.
• Emission estimate documented
  Record the estimated emission rate, quantification method, and units used, if applicable.
• Leak location and asset reference documented
  Describe the location, component, or asset associated with the detected emission or leak indication.

Disposition, Corrective Action, and Sign-Off

• Immediate notification made for critical leak indication
  Confirm the supervisor, control room, or responsible party was notified when required by the leak detection program.
• Corrective action or follow-up work order created
  Document any repair request, re-survey requirement, or escalation initiated after the survey.
• Inspector signature
  Inspector attestation that the survey record is complete and accurate.