Gas Distribution Leak Survey Bar Hole Log

Field inspection log for documenting bar-hole and surface gas leak survey readings along gas distribution mains, including instrument verification, ppm or %LEL measurements, leak classification, and follow-up disposition.

Inspection Details and Survey Scope

• Survey date and start time recorded
• Survey route, main segment, or stationing identified
• Survey type selected
• Weather and ground conditions noted
• Survey performed by competent person or qualified technician
• Reference work order, map, or SOP documented

Instrument Verification and Calibration

• Gas detection instrument identified by make, model, and serial number
• Instrument bump test or functional check current
• Calibration date within required interval
• Measurement mode selected correctly
• Sampling probe, hose, or bar-hole adapter inspected for damage and leaks

Bar-Hole and Surface Readings

• Reading location recorded with stationing or offset
• Bar-hole depth or probe insertion depth recorded
• Peak gas reading recorded in ppm
• Peak gas reading recorded in % LEL
• Odor, hissing, dead vegetation, bubbling, or other leak indicators observed
• Adjacent structures, valves, services, or appurtenances checked
• Repeat reading taken when initial reading exceeded action threshold

Leak Classification and Immediate Actions

• Leak classification assigned
• Area secured or traffic/pedestrian controls established when needed
• Utility notification or escalation completed for confirmed leak
• Emergency response or excavation hold placed when required

Disposition, Corrective Action, and Sign-Off

• Follow-up disposition documented
• Corrective action details entered for any deficiency or non-conformance
• Inspector signature completed
• Supervisor review required for critical leak or failed instrument check