|Chapter 6540 Oxygen Deficiency Hazard (ODH) Control Program|
At Jefferson Lab there is the potential for oxygen deficiency hazards (ODHs) due to cryogens, compressed/solidified gases, and/or clean-agent fire suppression systems. This ODH Control Program provides procedures for: determining when an ODH risk assessment is required; determining ODH classifications, appropriate engineering and administrative controls, training and medical exclusions to facilitate worker and equipment safety; and appropriate emergency response.Scope
Jefferson Lab considers ODH to be a hazard issue. This document complies with applicable federal, state, and local requirements outlined in ES&H Manual Chapter 2410 Appendix T1 Hazard Issues List.
An ODH exists when the concentration of oxygen is less than or equal to 19.5% (by volume) at a typical barometric pressure of 760 mm Hg.
At Jefferson Lab there are five ODH levels (see ES&H Manual Chapter 6540 Appendix T2 ODH Classifications, Engineering and Administrative Control Practices, Training, and Medical Exclusions). The hazard increases as the number increases. Work areas are classified based on the statistical probability of one fatality due to an ODH in a specified number of worker-hours:
Table 1: Required ODH Safety Training by Job Classification
T1 Oxygen Deficiency Hazard (ODH) Safety Review
An ODH Safety Review is performed when gas is proposed, altered, discovered, or as requested in accordance with ES&H Manual Chapter 3210 Work Planning, Control, and Authorization Process. Relevant factors include, but are not limited to:
T2 ODH Classifications, Engineering and Administrative Control Practices, Training, and Medical Exclusions
Jefferson Lab's ODH control program includes engineering controls, administrative controls, and medical exclusions to facilitate worker and equipment safety. ES&H Manual Chapter 6540 Appendix T2 ODH Classifications, Engineering and Administrative Control Practices, Training, and Medical Exclusions outlines how to recognize ODH areas; and describes the control(s)/exclusion(s) required for entry and work within an area so designated.
T3 ODH Emergency Response Procedure
Jefferson Lab utilizes both installed and personal oxygen monitors. A detected oxygen concentration of 19.5% or less triggers an alarm.
Management authority may be delegated at the discretion of the responsible manager.
Anyone at Jefferson Lab
Qualified ODH Worker
Supervisors/Subcontracting Officer's Technical Representative (SOTR)/Sponsor
ODH Safety Reviewer
ODH Analysis Authority
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