Manhole and Vault Entry Atmospheric Test Log

Inspection log for utility manhole and vault entries treated as permit-required confined spaces, documenting atmospheric testing, ventilation, and entry controls before and during entry.

Inspection Details

• Entry location identified
  Record the manhole or vault identifier, address, asset number, or other unique location reference.
• Inspection date and time
  Document when the atmospheric test log was completed.
• Inspector / tester name
  Name of the qualified person performing the atmospheric test and entry verification.
• Work order or permit number
  Record the associated work order, permit, or job control number.

Pre-Entry Conditions

• Space identified as permit-required confined space
  Confirm the manhole or vault has been evaluated and controlled as a permit-required confined space where applicable.
• Entry authorization completed before entry
  Verify entry authorization, permit approval, and required pre-entry checks were completed before anyone entered.
• Area secured from unauthorized access
  Confirm barriers, covers, cones, or other controls are in place to prevent unauthorized entry or exposure.
• Isolation and energy control verified
  Confirm applicable lockout-tagout, blanking, disconnect, or other isolation measures are in place before entry.

Atmospheric Testing

• Initial atmospheric test completed before entry
  Verify the atmosphere was tested before any entry into the manhole or vault.
• Oxygen concentration
  Record the measured oxygen concentration at the opening and at representative levels in the space.
• Combustible gas reading
  Record the combustible gas concentration as a percentage of the lower explosive limit (LEL).
• Toxic gas readings recorded
  Select any toxic gases tested for and document the measured values in comments if applicable.
• Atmospheric test results acceptable for entry
  Confirm all required readings were within acceptable limits before entry was authorized.

Ventilation and Entry Controls

• Mechanical ventilation in operation
  Confirm ventilation equipment is operating when required and air movement is directed to the space as intended.
• Ventilation maintained during entry
  Verify ventilation remained in operation throughout entry when required by the permit or site procedure.
• Continuous or periodic monitoring established
  Confirm the monitoring frequency or continuous monitor requirement was established and followed during entry.
• Entry controls and attendant in place
  Confirm an attendant, communication method, and entry control measures were in place before and during entry.

Deficiencies, Corrective Actions, and Sign-Off

• Deficiencies or non-conformances documented
  Record any unsafe conditions, failed tests, ventilation issues, or entry control deficiencies observed.
• Corrective actions completed before entry continued
  Confirm corrective actions were completed and the space was re-tested before entry continued after any deficiency.
• Inspector signature
  Signature of the qualified person completing the log.