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6540 Appendix T1 Oxygen Deficiency Hazard (ODH) Safety
Review |
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Jefferson Lab has determined that working within an
ODH area that has not been subjected to a Safety Review or Risk Assessment
carries an unmitigated Risk Code >2. An ODH area that
has been reviewed and identified control measures have been instituted is
considered mitigated to a RC <2. It does not require an OSP. An Operational Safety Procedure (OSP) is required when any work
is considered to be a Risk Code >2 in accordance with ES&H Manual Chapter 3210 Work Planning, Control,
and Authorization Process. |
1.0
Purpose
An Oxygen Deficiency Hazard (ODH) Safety Review is performed when gas is proposed, switched, or discovered in a process or an area; or as requested in accordance with ES&H Manual Chapter 3210 Work Planning, Control, and Authorization Process. If the system involved is complex and/or where experience demonstrates an ODH Risk Assessment WILL be required, an ODH Safety Review Form need not be completed. Relevant factors include, but are not limited to:
·
Volume of the area
·
Potential volume of the gas
·
Work to be performed in the area
·
Engineering controls currently in place
·
Required administrative controls
·
Existing ODH sources or installations
This appendix provides instructions on how to complete an ODH Safety Review Form so an accurate determination of risk can be made and appropriate mitigation can be implemented.
2.0 Scope
The ODH Safety Review Form is to be completed for any area before an ODH is introduced, or when it is recognized. This includes, but is not limited to, fixed sources and permanently installed equipment. The ODH Safety Review Form is also used to assist in identifying areas that have the potential to become oxygen deficient. If the potential ODH is located outside, this ODH Safety Review procedure is not appropriate. For these cases, the individual is directed to ES&H Manual Chapter 6540 T4 Oxygen Deficiency Hazard (ODH) Risk Assessment for guidance.
The process steps for this procedure are performed in coordination with ES&H Manual Chapter 6540 Oxygen Deficiency Hazard Control Program.
3.0
Responsibilities
NOTE: Management authority may be delegated to a task qualified Jefferson Lab employee at the discretion of the responsible manager.
3.1
Anyone at Jefferson Lab
·
Complete an ODH Safety
Review Form prior to introducing
an ODH, prior to alteration of a system or area that might produce an ODH, when
an ODH area is recognized, or as requested by a cognizant individual.
·
Review ODH Safety Review Form conclusions and, if acceptable, approve the
completed form.
·
Submit a request for a Facility Design Review or ODH Risk
Assessment as appropriate.
·
Distribute/File final approved ODH
Safety Review Form 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.
·
Coordinate review of documentation every three
years if ODH is present.
·
Qualifications
include:
o Certified
Industrial Hygienist
o Approved
by the ESH&Q Division Head
3.3
ODH
Analysis Authority
·
Provide assistance to the ODH Safety Review Form author and the ODH
Safety Reviewer as required.
·
Perform a review of ODH documentation every three years if an ODH is
present.
·
Qualifications
include:
o Demonstrated
ability to analyze and mitigate oxygen deficiency hazards within laboratory
user systems.
o Maintain appropriate training SAF103 Oxygen
Deficiency Hazard
o Technical
proficiencies and knowledge of:
§ ODH
evaluations, calculations, design/implementation of control measures
§ common
compressed and liquefied gases, mixed gas properties
§ ODH
propagation calculations
§ 29
CFR 1910.146 Permit Required Confined Spaces
§ Pressurized
gas mechanical systems with their associated failure modes analysis.
o One
of the following:
§ Completion
of an engineering or physics degree, requiring four or more years of full time
study, plus a minimum of five years experience relating to the technical
requirements listed above.
§ Professional
Engineering registration, recognized by the local jurisdiction, plus experience
in systems relating to ODH classification, mitigation, evaluation, and their
properties.
4.1
ODH Description and Basic O2
Calculation:
Using the online ODH Safety Review Form, fill in all information requested.
Step 1:
Introduction
·
Task Title: Brief description of
work.
·
Location: Specify building,
room, or area and contiguous areas and relative position within the building or
larger area.
·
Effective Date: Date when the ODH will
be introduced (not necessarily the date the form is approved).
·
Expiration Date: Date by which the area
must be re-assessed or hazard will no longer apply (not to exceed three years).
·
Document
/Division/Department Owner: Print name of person responsible for the work, their
division/department.
Step 2:
Hazard Information
·
Gas(es) to be
Introduced: List the name and source concentration of the gas(es). Denote any
additional hazard issues that may be of concern.
·
Denote Hazard Category (See ES&H Manual
Chapter 6150 Compressed Gases)
·
Denote if gas is self-contained (In a Dewar or
similar?)
·
Attach copies of any existing Oxygen
Deficiency Hazard Risk Assessments for the building and any additional
supporting documents/calculations.
Step 3:
Building or Room Volume
See Facilities
Management and Logistics List of Facilities Online Facilities Database for
square footage and Primary Custodian contact information. Consult with the
Primary Custodian for height, usable area and ventilation capacities.
Step 4:
Basic %O2 Calculation
Depending on the location of your source, complete the appropriate
calculation:
IF |
THEN |
|
Source is
located inside the proposed ODH
area |
Calculate: |
21(VR VG) VR |
OR |
||
Source
is located OUTSIDE the proposed ODH area * |
Calculate: |
21(VR/t) (Q + VR/t) * |
Where:
VR = the total volume of
the room in cubic
feet VG
= the volume of gas at room temperature and pressure in cubic feet t =
time in hours(s) Q
= Volumetric flow rate of
gas into room at room temperature and pressure in cubic feet per hour (Contact Engineering if you require
assistance) * Assuming one fresh air change per hour (ACH). If more than one ACH is needed additional
review may be required. |
4.2
Designate ODH
Classification 0 or Perform ODH Risk Assessment: With the calculated %O2
from Step 4, use the following table to either complete the ODH Safety
Review Form or revert to the procedures identified in ES&H Manual Chapter 6540 T4 Oxygen Deficiency
Hazard (ODH) Risk Assessment
If
Resulting % Oxygen is: |
Document Owner shall: |
≥19.5 |
1. Input ODH Classification 0 below 2. Obtain approvals per Department Procedures 3. Submit completed form to ODH Safety Reviewer. |
18 - 19.5 |
1. Submit preliminary form to ODH Safety Reviewer. 2. Document Owner and ODH Safety Reviewer identify special
mitigations that make area ODH
Classification 0. Alternatively, ODH Safety Reviewer may request
an ODH Risk Assessment. 3. Input ODH Classification 0 below 4. Obtain approvals per Department Procedures 5. Resubmit completed form to ODH Safety Reviewer for two ODH
Safety Reviewer signatures. |
<18 |
Send information to ODH Analysis Authority for an ODH Risk
Assessment according to ES&H Manual Chapter 6540 T4 Oxygen Deficiency
Hazard (ODH) Risk Assessment. Form is no longer valid or required. |
4.3
Final Submittal (does not apply to ODH
Classification >0)
Step 1: Document Owner and/or ODH Analysis Authority submit the completed online ODH Safety Review Form and relevant attachments to ODH Safety Reviewer for approval.
Step 2: ODH Safety Reviewer reviews the completed form and:
§ Verifies ODH Classification 0
§ Provides approval signature (a second ODH Safety Reviewer signature is required for 18-19.5% O2)
§ Posts the ODH Classification signage
4.4
Distribution:
Upon final approval, the ODH Safety Reviewer makes the
following distributions:
·
Copies to: affected area, Document
Owner and ESH&Q Document Control.
4.5 Review document every three years if ODH is still present (coordinated by ODH Safety Reviewer, performed by Document Owner) Distribution:
5.0
ODH Safety Review Flowchart
6.0
Revision Summary
Revision 1.3 11/06/20 Periodic Review; updated header and footer and link to the ODH form, minor edits, no approval needed
Revision 1.2 07/19/18 Periodic Review; updated Step 4 Preliminary ODH calculation for outside sources and the ODH Safety Review Flowchart
Revision 1.1 06/22/16 Updated TPOC from D.Owen to J.Williams
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 |
07/19/18 |
07/19/21 |
1.2 |
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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 users responsibility to ensure
that the document is the same revision as the current on line file. This copy was printed on 11/18/2020.