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DOCUMENT ID: |
6540 Appendix
T2 ODH Classifications,
Engineering and Administrative Control Practices, Training, and Medical
Exclusions |
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Jefferson Labs Oxygen Deficiency
Hazard (ODH) Control Program (see ES&H Manual Chapter
6540 ODH Control Program) includes engineering
controls, administrative
controls, and medical exclusions to facilitate worker and equipment safety.
This document outlines how to recognize ODH areas and
describes the control(s)/exclusion(s) required for
entry and work within a designated area.
3.0
Responsibilities
3.1
Anyone Requiring
Entry into an ODH Area
·
Maintain
appropriate ODH training and medical approval. For entry into:
§ SAF103 Oxygen Deficiency
Hazard, OR
§ Contact your Supervisor/Subcontracting Officers Technical
Representative (SOTR)/Sponsor to
assign a qualified escort. Refer to ES&H Manual Chapter 1400 Communication of Safety to
Visitors.
o ODH 2 and higher:
§ SAF103 Oxygen
Deficiency Hazard and medical monitoring. Refer
to ES&H Manual Chapter 6800 Appendix T1 Medical
Monitoring.
§ Respiratory Protection Training:
·
ODH 2
or ODH 3 SAF 210 (Escape Pack Training)
·
ODH 4
SAF 109 (SCBA Training)
·
Observe and follow posted
ODH restrictions.
·
Abide by the administrative
controls described in Table 2: Summary of ODH Administrative Controls.
3.2
Supervisor, Technical Representative (TR), Sponsor
· Ensure workers are appropriately trained and medically approved prior to performing work within ODH areas.
· Notify Occupational Medicine when a worker requires ODH 2 and higher medical monitoring. Refer to ES&H Manual Chapter 6800 Appendix T1 Medical Monitoring and its supporting appendices.
· Report any near-miss or actual ODH events to the ES&H Reporting Officer in accordance with ES&H Manual Chapter 5200 Event Investigation and Causal Analysis Process.
3.3
Division Safety Officers (DSOs)
·
Ensure an ODH
Safety Review/Risk Assessment has been performed and is current for any ODH
area under your purview. IT IS IMPORTANT TO CONSIDER AND MITIGATE AN ODH EARLY
IN THE DESIGN/FABRICATION PROCESS.
· Ensure that engineering and administrative controls required per ODH Risk Assessment under their authority are functioning.
o When deficiencies are noted, the DSO shall ensure that corrective action is taken and follow protocols identified in ES&H Manual Chapter 6540 Appendix T2 ODH Classifications, Engineering and Administrative Control Practices, Training, and Medical Exclusions
· DSOs may delegate all or part of the work associated with these tasks but shall not delegate any responsibility.
3.4
ODH
Analysis Authority
· As part of the ODH Risk Assessment process, ensure that engineering and administrative controls such as ventilation, installed ODH monitoring devices and plugged penetrations are identified in the ODH Risk Assessment.
3.5
ODH
Safety Reviewer
·
Review and approve ODH Safety
Review document(s) and ODH Risk Assessments, if acceptable.
·
Distribute/File final approved ODH
Safety Review Forms and Risk Assessments to affected area, Document Owner and
ES&H Document Control.
·
Verify that ODH equipment safeguards, inventory
requirements, posting, and labeling are in-place prior to introduction of the
ODH.
·
When required, work with Division
Safety Officers or their designees to determine temporary area entry
requirements if an engineering or administrative control fails, is taken
out of service, or is disabled by power outage
·
Maintain
and provide training
for Personal Oxygen Monitors, Escape Packs, and
Self-Contained Breathing Apparatus (SCBA).
3.7
Engineering
Division (Safety Systems Group and Cryogenic Operations)
Safety Systems Group and Cryogenic Operations
· Install, maintain and calibrate area oxygen monitoring systems associated with accelerator enclosures (e.g. CEBAF, LERF, UITF) under their purview.
Engineering Division Manager or Cryogenic Department Head
· Approve ODH Risk Assessments.
3.8
Physics
and Accelerator Divisions
·
Install, maintain and calibrate area oxygen
monitoring systems under their purview.
3.9
Facilities
Management and Logistics
· Provide room measurements upon request.
· Provide ventilation capacities upon request.
· Provide and maintain building ventilation systems.
· Install, maintain and calibrate area oxygen monitoring systems under their purview.
All ODH
areas are posted with
appropriate ODH warning signs. Postings and controls are determined by an ODH
Safety Review and/or ODH Risk Assessment. Table 1: ODH Classifications and their
Required Controls
lists the ODH Classification; an example of area
postings; and the required controls to work within each level of classification.
Table 1 - ODH Classifications and their Required Controls |
|
ODH Classification |
Required Controls |
Estimated fatality rate > 10 million hours |
·
Supervisor approval
and appropriate training (SAF103 Oxygen
Deficiency Hazard) prior to entry. ·
Tunnel penetrations (within
LERF, North Linac, South Linac and Injector Service Buildings) are filled and
plugged. (Plugged penetrations are
only opened by the Installation
and Vacuum Group.) |
Estimated
fatality rate: 100,000 to 10 million hours |
·
Supervisor approval and
appropriate training (SAF103 Oxygen
Deficiency Hazard). ·
Two or more
individuals in constant communication (verbal and/or visual). ·
Installed oxygen
monitor. ·
Proper ventilation during
occupancy (at least one effective volume change per hour). Ventilation-rate
data is available from Facilities
Management & Logistics. |
Estimated fatality rate: 1,000 to 100,000 hours |
·
All requirements
listed in ODH 1. and ·
Medical Monitoring. See ES&H Manual Chapter
6800 Appendix T1 Medical Monitoring. ·
A personal oxygen monitor
for each worker. Personal oxygen monitors are issued and maintained by Industrial Hygiene. ·
Escape Pack (and
training in its use) available in the area during work. See ES&H Manual Chapter 6630 Respiratory Protection. |
Estimated fatality rate: From 10 to 1,000 hours |
·
All Requirements
listed in ODH 2, and ·
An unexposed observer. |
Estimated fatality rate: Less than 10 hours |
·
All requirements in ODH 2 except: ·
Instead of an Escape Pack:
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4.1.1
Buildings with Multiple ODH Areas
Buildings
with both ODH 0 and ODH 1 areas have a combined warning posting (Figure 1) on the
exterior. Each interior ODH area has the
appropriate posting at the entrance and requires the specified controls (listed in Table 1: ODH Classified Areas and their Required ODH
Controls) to
access.
Figure
1: Buildings with Interior Areas Classified as ODH 0 and ODH 1
Jefferson Lab incorporates
engineering controls (e.g.: piping, relief valves, and vents) into the initial review,
design, and construction of its infrastructure (refer to ES&H Manual Chapter 3110
Facility Design and Modification Review). An ODH Safety
Review and/or an ODH Risk Assessment is performed when an ODH is introduced,
altered, or as requested (refer to ES&H Manual Chapter
6540 Appendix T1 ODH Safety Review and/or
Appendix T4 ODH Risk Assessment). It is performed to identify the hazard and to
determine if more rigor is required to ensure appropriate mitigation is implemented.
Table 2 - Summary of Required Engineering Controls |
ODH Class |
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X indicates the control is required within the given area. |
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Engineered Controls |
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Ventilationat least one effective
volume change per hour. (Obtain ventilation-rate data from Facilities
Management.) |
X* |
X |
X |
X |
X |
Penetration sealing, when applicable,
such as for CEBAF, UITF, LERF. (Accessed only by Installation and
Vacuum Group.) |
X |
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*If gas is
plumbed into a room, proper ventilation equipment or vents must be installed. |
NOTE: A failure of any engineering or administrative control that provides ODH mitigation (e.g.: installed monitors, ventilation, etc.) requires temporary reposting of the area with appropriate warnings and entry requirements until the system is functioning properly. |
To access or work within an ODH classified area, individuals are trained (see web-based
training SAF103 Oxygen Deficiency Hazard), and assigned medical
monitoring as required for certain conditions.
Personnel with ODH medical exclusions (see Table 4 Medical
Exclusions) are only
authorized to work in ODH areas to the limit of the exclusion.
Visitors are allowed only under the supervision of
an ODH trained escort. Refer to ES&H Manual Chapter 1400 Communication of Safety to Visitors.
ODH Class |
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X indicates the control
is required within the given
area. |
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Administrative
Controls |
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Posted warning
signs |
X |
X |
X |
X |
X |
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Installed oxygen
monitor/alarms |
|
X |
X |
X |
X |
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ODH
training/testing (Web-based training SAF103 Oxygen
Deficiency Hazard. Renew every 2 years.) |
X |
X |
X |
X |
X |
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Multiple
personnel in communication with each other |
X |
X |
X |
X |
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Medically approved
as ODH
Qualified
(See ES&H
Manual Chapter 6820 Medical Monitoring.) |
X |
X |
X |
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Personal oxygen
monitor (Obtain from Industrial Hygiene.) |
X |
X |
X |
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Emergency Escape
Pack (including training) (Obtain from Industrial Hygiene.) |
X |
X |
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Unexposed Observer (3rd person) |
X |
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Self-Contained
Breathing Apparatus (SCBA) (including training) (Obtain from Industrial
Hygiene.) |
X |
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4.4
Engineering and
Administrative Controls requirements & verification
4.4.1
Initial ODH Assessment:
The ODH Analysis Authority is responsible for documenting engineering and administrative controls such as ventilation, installed ODH monitoring devices and plugged penetrations in the ODH risk assessment. The ODH Safety Reviewer verifies these controls are in-place prior to approving the ODH Risk assessment.
4.4.2
Continued
Verification of Controls:
Division Safety Officers (DSOs) are responsible for ensuring that engineering and administrative controls under their authority continue to function. Controls must be verified on a daily basis. This responsibility may be delegated.
4.4.3
If a
Control Fails, is Taken Out of Service, or is Disabled by a Power Outage:
If an approved procedure is in-place for an engineering or adminstrative control failure, out of service condition or power outage, that existing procedure shall be followed. The ODH Safety Reviewer shall be notified of the temporary posting and repair strategy within 24 hours. For all other circumstances, the DSO or designee shall ensure that the following measures are taken:
·
Contact the ODH Safety
Reviewer to determine temporary area entry requirements.
·
Post a temporary
warning at each entrance to the area. Include appropriate wording to describe
the hazard as well as entry requirements which may include locking the area to
prevent personnel access.
·
Submit the appropriate
work request for repair of the equipment involved.
·
Upon completion of the
repair, remove the temporary posting.
Medical approval is required only for ODH 2, 3, and 4 work. Most
Jefferson Lab personnel and scientific users work in ODH 0 or 1 areas, so
medical approval is not a prerequisite. ODH
0/1 workers do not need and will not have medical approval.
4.5.1
ODH Qualified a medical classification whereby Jefferson Lab Occupational
Medicine designates an individual as medically fit to participate in all ODH
operations. This classification must be renewed every three (3) years.
4.5.2
ODH Restricted a medical classification whereby Jefferson Lab Occupational
Medicine designates an individual as medically fit to participate in ODH Class
0 and Class 1 operations, and in Class 2 and Class 3 operations when escorted
by a separate ODH Qualified person. This classification must be renewed every three
(3) years.
4.5.3
ODH Excluded a medical classification whereby Jefferson Lab Occupational
Medicine prohibits an individual from participation in any ODH Class 2 or
greater operation. This classification remains until the person is reclassified
by Occupational Medicine.
Table 4 ODH Medical Exclusions |
ODH Class |
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X indicates entry into area can be authorized. |
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Medical Exclusions (See ES&H Manual Chapter 6800 Appendix T1 Medical Monitoring.
Medical designation on SRL.) |
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X |
X |
X |
X |
X* |
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X |
X |
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ODH Restricted
with one-to-one escort who is ODH Qualified |
X |
X |
X |
X |
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ODH Excluded
Prohibited for Class 2 and above |
X |
X |
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*Must also have Self-Contained
Breathing Apparatus (SCBA) training and approval from Cryogenic Department
Head and JLab Certified Industrial Hygienist |
Unexposed Observer This individual is
in constant audible and/or visual contact with workers within an ODH classified
area, but is not exposed to the hazard. The Unexposed Observer must have a reliable
and tested means of communication (for example phone or radio) to summon help
if necessary.
6.0
Revision Summary
Revision 2.1 11/06/2020 Periodic Review; updated signage, changed ESH&Q to ES&H, changed SOTR to TR, updated the header and footers, no approval needed.
Revision 2.0 11/06/17 Periodic Review; updated signage and expectations for failures/repairs of engineering controls to reflect current operations; added responsibilities for Area Managers, Engineering Division, and Facilities Management & Logistics
Revision 1.3 06/22/16 Updated TPOC from D.Owen to J.Williams
Revision 1.2 12/07/15 Updated ODH Classification signs in Table 1
Revision 1.1 11/03/14 Clarified responsibilities for anyone requiring entry into an ODH Area per R.Owen
Revision 1.0 01/17/12 Updated to reflect current laboratory operations
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ISSUING
AUTHORITY |
TECHNICAL POINT-OF-CONTACT |
APPROVAL
DATE |
REVIEW DATE |
REV. |
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ES&H Division |
11/06/17 |
11/06/23 |
2.1 |
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