TITLE:

ES&H Manual

 

DOCUMENT ID:

6540 Appendix T2

ODH Classifications, Engineering and Administrative Control Practices, Training, and Medical Exclusions

 

 

1.0            Purpose

 

Jefferson Lab’s 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.

 

2.0            Scope

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:

o   ODH 0 or ODH 1:

§  SAF103 Oxygen Deficiency Hazard, OR

§  Contact your Supervisor/Subcontracting Officer’s 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, Subcontracting Officer’s Technical Representative (SOTR), 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 ESH&Q 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 ESH&Q 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

 

3.6              Industrial Hygiene

·         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.

 

4.0            Expectations

 

4.1              ODH Classifications

 

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

ODH 0

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.)

ODH 1

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.

ODH 2

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.

ODH 3

Estimated fatality rate:

From 10 to 1,000 hours

·      All Requirements listed in ODH 2,

and

·      An unexposed observer.

ODH 4

Estimated fatality rate:

Less than 10 hours

·      All requirements in ODH 2

except:

·      Instead of an Escape Pack:

  • Individuals wear a Self-Contained Breathing Apparatus (SCBA). The SCBA requires medical approval by Occupational Medicine and annual training in SCBA use. 

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

 

4.2              Engineering Controls

 

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

“X” indicates the control is required within the given area.

0

1

2

3

4

Engineered Controls

Ventilation—at 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

 

 

 

 

*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.

 

4.3              Administrative Controls

 

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.

 

Table 3 – Summary of ODH Administrative Controls

ODH Class

“X” indicates the control is required within the given area.

0

1

2

3

4

Administrative Controls

Posted warning signs

X

X

X

X

X

Installed oxygen monitor/alarms

 

X

X

X

X

ODH training/testing (Web-based training SAF103 Oxygen Deficiency Hazard.  Renew every 2 years.)

X

X

X

X

X

Multiple personnel in communication with each other

X

X

X

X

Medically approved as ODH Qualified (See ES&H Manual Chapter 6820 Medical Monitoring.)

X

X

X

Personal oxygen monitor (Obtain from Industrial Hygiene.)

X

X

X

Emergency Escape Pack (including training) (Obtain from Industrial Hygiene.)

X

X

Unexposed Observer (3rd person)

X

Self-Contained Breathing Apparatus (SCBA) (including training) (Obtain from Industrial Hygiene.)

X

 

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.

 

4.5              ODH Medical Exclusions

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

“X” indicates entry into area can be authorized.

0

1

2

3

4

Medical Exclusions (See ES&H Manual Chapter 6800 Appendix T1 Medical Monitoring.  Medical designation on SRL.)

ODH Qualified

X

X

X

X

X*

ODH Restricted

X

X

ODH Restricted – with one-to-one escort who is ODH Qualified

X

X

X

X

ODH Excluded – Prohibited for Class 2 and above

X

X

 

 

 

*Must also have Self-Contained Breathing Apparatus (SCBA) training and approval from Cryogenic Department Head and JLab Certified Industrial Hygienist

 

5.0            Definitions

 

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 2.0 – 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

 

 

 

ISSUING AUTHORITY

TECHNICAL POINT-OF-CONTACT

APPROVAL DATE

REVIEW DATE

REV.

 

 

ESH&Q Division

Jennifer Williams

11/06/17

11/06/20

2.0

 

This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 11/7/2017.