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.  This document outlines how to recognize ODH areas; and describes the control(s)/exclusion(s) required for entry and work within a designated area. 

 

2.0          Responsibilities

 

2.1            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

o   ODH 2 and higher: SAF103 Oxygen Deficiency Hazard and medical monitoring.  (See ES&H Manual Chapter 6800 Appendix T1 Medical Monitoring.)

§  (SAF 210) Escape pack training, or

§  For ODH 4 – (SAF 109)SCBA Training

OR

 

Contact your Supervisor/Subcontracting Officer’s Technical Representative (SOTR)/Sponsor to assign a qualified escort (see ES&H Manual Chapter 1400 Communication of Safety to Visitors).

·       Observe and follow posted ODH restrictions.

·       Abide by the administrative controls described in Table 2: Summary of ODH Administrative Controls.

 

2.2            Supervisor/Subcontracting Officer’s Technical Representative (SOTR)/Sponsor

·       Ensure an ODH Safety Review/Risk Assessments has been performed for any ODH area where individuals under your authority are assigned; that it is current; and appropriate hazard mitigation requirements are in place.

·       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.  (See 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.

 

2.3            Industrial Hygiene

·       Maintain and provide training for Personal Oxygen Monitors, Escape Packs, and Self-Contained Breathing Apparatus (SCBA).  

 

3.0          Expectations

 

3.1            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 FEL, 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. 

·     Installed oxygen monitor.

·     Proper ventilation (at least one effective volume change per hour) during occupancy.  (Ventilation-rate data is available from Facilities Management & Logistics.)

ODH 2

Estimated fatality rate:

From 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.) 

 

3.1.1       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

 

3.2            Engineering Controls

 

Jefferson Lab incorporates engineering controls (e.g.: piping, relief valves, and vents) into the initial review, design, and construction of its infrastructure (see ES&H Manual Chapter 3110 Facility Design and Modification Review).  An ODH Safety Review is performed when an ODH is introduced, altered, or as requested (see ES&H Manual Chapter 6540 Appendix T1 ODH Safety Review).  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

Installed oxygen monitor (See Installed Monitoring – Out of Service for temporary monitoring when an installed oxygen monitor is out of service)

 

X

X

X

X

Ventilation—at least one effective volume change per hour. (Obtain ventilation-rate data from Facilities Management.) 

X*

X

X

X

X

Penetration sealing. (Accessed only by Installation and Vacuum Group.)

X

 

 

 

 

*If gas is plumbed into a room you must have ventilation.

 

NOTE: A failure of any engineering control that provides ODH mitigation (e.g.: installed monitors, ventilation, etc,) requires temporary reposting of the area to at least one class higher until the system is functioning properly.  Temporary oxygen monitoring systems may also be required during repairs.

 

3.3            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 3 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.  (See 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

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

 

3.4            ODH Medical Exclusions

 

3.4.1       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.

 

3.4.2       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.

 

3.4.3       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 personnel

X

X

 

 

 

 

4.0          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.  A reliable means of communication is required.  The purpose of the unexposed observer is to summon help if necessary.

 

5.0          Revision Summary

 

Revision 101/17/12 – Updated to reflect current laboratory operations.

 

 

 

ISSUING AUTHORITY

TECHNICAL

POINT-OF-CONTACT

APPROVAL DATE

EXPIRATION DATE

REV.

 

 

ESH&Q Division

Richard Owen

01/17/12

01/17/17

1

 

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 10/3/2012.