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ES&H Manual
Chapter 3330 Stop Work and Re-Start for Safety Program


Jefferson Lab considers no activity to be so urgent or important that its standards for environment, safety, or health (ES&H) may be compromised. Therefore, all individuals at Jefferson Lab have the responsibility, and authority, to stop work when conditions appear to pose a hazard. This stop-work and re-start program is provided to ensure the safety of individuals, equipment, and the environment.

10 CFR 851 Worker Safety and Health Program (§851.20(b)(8)) specifically gives every worker the right to decline assigned work if they have a reasonable belief it may pose an imminent risk of physical harm. Further, a worker has the right to stop work if a dangerous condition arises.

This program satisfies applicable federal, state, and local requirements as outlined in ES&H Manual Chapter 2410 Appendix T1 Hazard Issues List.


This Stop Work and Re-Start for Safety Program is for "in-progress work." It is not intended to replace safety mitigation measures developed during work planning.


T1 Suspend Work for Safety Procedure
ES&H Manual Chapter 3330 Appendix T1 Suspend Work for Safety Procedure is implemented when a hazard issue is discovered, or is anticipated, that will effect individuals, equipment, or the environment. All parties agree with the mitigation measures; but work must be suspended until the measures are implemented.
T2 Stop Work Order for Safety Procedure
ES&H Manual Chapter 3330 Appendix T2 Stop Work Order for Safety Procedure, initiated when a definitive statement is made that an imminent danger has developed, a hazard issue is discovered, a Task Hazard Analysis (THA) reveals a post mitigated Risk Code >3, or individuals cannot resolve an issue in a mutually acceptable manner.
T3 Stop Work Order for Safety Worksheet
View T3 Stop Work Order for Safety Worksheet (html | .doc)
T4 Work Re-Start Procedure
ES&H Manual Chapter 3330 Appendix T4 Work Re-Start Procedure ensures the safety of individuals, equipment, and the environment after a work delay. Characteristics of each delay, including urgency, resources, timeliness of communications, etc, differ. This document provides the minimum requirements to ensure that safe, effective work planning has been enacted prior to work re-start.
Figure 1. Suspend/Stop Work for Safety


Note: Management authority may be delegated to a task qualified Jefferson Lab employee at the discretion of the responsible manager.

Everyone at Jefferson Lab
Supervisor/Technical Representative(TR)/Sponsor
  • Complete a THA for the suspended/stopped work activity. Provide it for reviewed to the Associate Director - Environmental, Safety, Health, and Quality (ES&H) as required.
  • Notify area Safety Warden of any stopped work.
  • Discuss the proposed/implemented resolution with the identifier to ensure the identified hazard was mitigated.
  • Inspect the area after resolution to ensure personnel safety.
    • Notify the Division Associate Director or Manager.
    • Enforce the order and monitor the area for the duration of the Stop-Work Order to ensure work does not resume until properly authorized.
    • Assure re-start is authorized by the system department or division manager.
    • Use the Quality Assurance Issues Management Procedure to resolve the concern.
  • Provide feedback and lessons learned using the Quality Assurance Operating Experience, Feedback, and Lessons Learned Program.
Safety Wardens
  • Provide area information to resolve suspend work conditions.
Associate Director/Division Manager
    • Inform the Associate Director-ES&H.
    • Inform your Division Safety Officer (DSO).
    • Investigate all Stop-Work Orders within your department.
    • Ensure the required corrective actions are implemented including provisions for hazard characterization, assessment, monitoring and surveillance to ensure the corrective action is effective.
    • Issue written restart authorization after corrective actions have been agreed upon.
Associate Director - ES&H
  • Inform Chief Operations Officer
  • Review THA to ensure accuracy.
Chief Operations Officer
  • Inform the Laboratory Director.
  • When disputes arise, arbitrate resolutions.
Division Safety Officer (DSO)
  • Advise the work authorizing manager regarding mitigation and restart activities.
Document Control:
    APPROVAL DATE:   06/06/19
    REVIEW DATE:  06/06/22
    Periodic Review - 06/06/16 - Periodic Review; no changes per TPOC.
    Revision 1.4 - 06/23/16 - Periodic Review; updated to align with revised Chapter 3410 Subcontractor Construction Safety.
    Revision 1.3 - 10/03/14 - Updated TPOC from H.Fanning to B.May.
    Periodic Review - 02/28/13 - No substantive changes per HFanning.
    Revision 1.2 - 03/27/12 - Update to Web format.
    Revision 1.1 - 04/21/10 - Clarified Figure 1.
    Revision 1.0 - 01/29/10: - Updated to incorporate Work Re-Start Procedure.

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. .