ES&H Manual



1400 Appendix T1

Visitor Safety Briefing Topics



1.0            Purpose


Jefferson Lab requires that Visitor(s) entering non-public[1] areas be accompanied by an Escort. Before entering non-public areas, Escorts are responsible for ensuring their Visitor(s) has a basic understanding of the hazards that may be encountered during the visit. This document provides safety topics to be discussed and actions to be performed prior to entering a non-public area with the Visitor(s)


At a minimum, topics from Section 4.0 Basic Safety Information are to be provided to every Visitor(s). Additional topics from Section 5.0 Additional Safety Information are selected if relevant to the hazards of the area to be visited. Not all hazards are relevant to every visit; in the interest of time, focus on topics relevant to the particular visit.


2.0            Scope


This appendix provides information to be included in a Visitor’s safety briefing. Additional information can be provided as necessary at the discretion of the Escort. Review the ES&H Manual for additional, or more detailed, processes and procedures.


The process steps for this procedure are performed in coordination with ES&H Manual Chapter 1400 Communicating Safety to Visitors.


3.0            Responsibilities


3.1              Escort

·         The Visitor’s safety is your priority.

·         Be familiar with and appropriately qualified, trained, and authorized to access the area(s) to be visited.

·         Ensure the route avoids hazards whenever possible.

·         Walk the route prior to the visit to ensure conditions.

·         Ensure a safety briefing has been provided to your Visitor(s) which includes the basic safety information and any additional information relevant to the hazard issues to be encountered. 

·         Abide by designated Escort Ratios (see Oxygen Deficiency Hazard (ODH) and Ionizing Radiation).


4.0            Basic Safety Information


Jefferson Lab considers no activity to be so urgent or important that we will compromise our standards for environmental protection, safety, or health. Escorts provide an initial safety briefing, which includes the Basic Safety Information outlined below, to Visitor(s) with the minimal expectation that this goal will be achieved. 


In all situations the first response of a Visitor(s) is to follow their Escort’s instructions.


Basic Safety Information

·       Emergency Response (fire alarms and other audible/visible warnings)

·       Equipment

·      Slips and Trips

·      General Medical/First Aid Response



4.1              Emergency Response (Fire Alarms other audible/visible warnings)

At Jefferson Lab there are a variety of built-in safeguards to alert individuals to a potentially dangerous situation. Evacuation is the most common activity performed when an alarm is activated. Visitor(s) are to follow their Escort’s directions and proceed to the designated muster point.


Escort Actions:

·         Review the emergency exit locations and appropriate muster point with your Visitor(s). (Exits are clearly marked by lighted signs in hallways and above exit doors. Evacuation floor plans are posted conspicuously in buildings.) 

·         When an alarm activates, tell your Visitor(s) to remain calm and follow you out of the building. (In accordance with ES&H Manual Chapter 3510 Appendix T1 Building Evacuation Procedure.)

·         If your Visitor(s) loses sight of you, they are to follow the posted evacuation floor plan. 

·         Gather at the designated muster point and await further instructions. 


4.2              Equipment

Visitors are asked to resist the urge to touch…anything. Aside from the fact that an experiment may be jeopardized, or equipment damaged – specific hazards to people include: pinch, cuts, shock, and blindness.


Escort Actions:

·         Do not allow your Visitor(s) to touch or handle any apparatus, equipment, or material unless you have given them specific permission to do so. 


4.3              Slips and Trips

Though Jefferson Lab has unusual equipment and complex activities, the most likely hazards are slips and trips. Uneven walking surfaces are generally the major culprit.


Escort Actions:

·         Tell Visitors to watch their step. 

·         Point out trip/slip hazards when encountered.

·         Use designated walkways.

·         Hold hand railings wherever possible.  

·         Tell your Visitor(s) to ask for assistance, if they need it, to maneuver around obstacles.

·         Adjust your route to accommodate inappropriate footwear. (High heels and sandals are not recommended anywhere on site, and are not allowed in some areas. Communicate this to your Visitor(s) prior to their arrival.)


4.4              General Medical/First aid Response

If you, the Escort, are hurt, the Visitor(s) should call 911 (preferably from a land-line).


Escort Actions:

·         Become familiar with Jefferson Lab’s injury and illness protocols outlined in ES&H Manual Chapter 6800 Appendix T2 Injuries and Illnesses Requiring First Aid or Emergency Medical Response.

·         If your Visitor(s) is seriously hurt or unable to get to Occupational Medicine call 911.


5.0            Additional Safety Information


Everyone at Jefferson Lab has the right to know the hazards which they may be exposed.  Escorts are required to describe the foreseeable hazards that may be encounter, to their Visitor(s) and perform the associated actions to facilitate their safety. 


Additional Safety Information

·      Personal Protective Equipment (PPE)

·      Material Handling Equipment (Forklifts, Cranes, Hoists, Aerial Lift Platforms)

·      Chemicals

·      Lasers

·      Oxygen Deficiency Hazard (ODH)

·      Cryogens

·      Magnetic Fields and Radio Frequency (RF) Radiation

·      Ionizing Radiation


5.1              Personal Protective Equipment (PPE)

There are areas at Jefferson Lab where basic and/or specialized PPE is required: hard hats, safety glasses, steel-toed shoes, hearing protection, face shields, gloves, knee pads, and proper work clothes are most common. Areas are generally posted with their requirements. 


Escort Actions:

·         Review the requirements of the area to be visited. (Review ES&H Manual Chapter 6620 Personal Protective Equipment Program and its associated appendices for additional information.)

·         Tell your Visitor(s), prior to arrival, to wear appropriate attire.

·         Provide your Visitor(s) with required PPE. (Jefferson Lab has a limited amount of basic and/or specialized PPE available for Visitor(s) use. To reserve these items call Industrial Hygiene.)

·         Don the appropriate PPE before entering the area.


5.2              Material Handling Equipment (Forklifts, Cranes, Hoists, Aerial Lift Platforms)

Only those who have been trained, certified, and authorized by Jefferson Lab may operate material handling equipment. Appropriate PPE is to be worn in and around areas where this equipment is in use.


Escort Actions:

·         If material handling equipment is allowed in the area to be visited contact the Area Work Coordinator and coordinate your route to their schedule.

·         Provide and don appropriate PPE prior to entering the area.

·         Stay clear of material handling equipment (whether in operation or stationary).

·         Do not walk under lifted or suspended loads.

·         Observe posted warnings.

·         Follow the directions of those conducting the work.

·         Stay on the marked paths.


5.3              Chemicals

Visitors are not authorized to handle or use hazardous chemicals at Jefferson Lab.


Escort Actions:

·         Review the requirements outlined in ES&H Manual Chapter 6610 Chemical Hygiene Program and its associated appendices prior to the visit.


5.4              Lasers

The greatest concern related to lasers is eye injury. Only individuals who are trained, qualified, and authorized by Jefferson Lab are allowed to work with laser equipment.


Escort Actions:

·         Follow the directions as posted on the area warning signs.

·         Do not point a laser at yourself or your Visitor(s).


5.5              Oxygen Deficiency Hazard (ODH)

ODH means not having an adequate amount of oxygen to breathe and could occur if cryogens, or other chemicals or gases, are released. Such a release could quickly reduce oxygen levels in an area. Only trained, certified, and qualified individuals are allowed to enter ODH-rated areas without an Escort. 


Escort Requirements:

·         Must be a Qualified ODH Worker. (See ES&H Manual Chapter 6540 Oxygen Deficiency Hazard Control Program for qualifying criteria.)


Escort Ratios:


Escort Ratio


1 Escort to 5 Visitors


1 Escort to 1 Visitor

ODH 2  or higher

No Visitors are allowed


Escort Actions:

·         Provide Visitor(s) with an ODH briefing before entering the area. Include a description of:

o   The alarm system and

o   Associated escape procedure.

·         Tell them never to breath or enter a vapor cloud. Instruct your Visitor(s) to hold their breath or use an alternate route to avoid contact.


For further information regarding ODH 0, ODH 1, ODH 2, ODH 3 and ODH 4 requirements see ES&H Manual Chapter 6540 Appendix T2 ODH Classifications, Engineering and Administrative Control Practices, Training, and Medical Exclusions


5.6              Cryogens  

Cryogens are used at Jefferson Lab. Hazard issues include thermal cold (immediate tissue damage) and Oxygen Deficiency. Buildings and work areas where cryogens are used are posted with warning signs. Only individuals who are trained, qualified, and authorized are allowed to work with cryogens at Jefferson Lab. Appropriate PPE is worn when working with these materials. 


Escort Actions:

·         Don appropriate PPE.

·         Tell your Visitor(s) to remain clear of cryogenic liquids during handling or dispensing.


5.7              Magnetic Fields and Radio Frequency (RF) Radiation

Jefferson Lab has a few areas where magnetic fields or RF radiation could interfere with instruments and electronic apparatus, including bioelectronic devices such as cardiac pacemakers.


Posted signs and flashing red warning lights indicate the presence of high magnetic fields in specific areas. In most cases, tape/rope or blockades indicate the potential “reach” of these magnetic fields.


Escort Actions:

·         Ask your Visitor(s) if they are affected by these limitations and alter your route to accommodate them.


5.8              Ionizing Radiation

Jefferson Lab’s accelerators and some components produce ionizing radiation, mostly x-rays, during operation. Radiologically controlled areas are posted with signs and, in some cases, warning lights. People under age 18 are not allowed to enter these areas.  Jefferson Lab does not recommend that women who are pregnant enter these areas.


Escort Requirements:

·         Must be a Qualified Radiation Worker (See ES&H Manual Chapter 6310 Radiation Protection Program for qualifying criteria.)


Escort Ratios:

Hazard Level

Escort Ratio

Radiologically Controlled Area

1 Escort to 5 Visitors


Escort Actions:

·         Contact the Radiation Control – Dosimetry Office prior to your visit.  Follow their instructions regarding before, during, and after visit activities.

·         You, or a member of your group, will be asked to wear a supplemental radiation dosimeter (a device that records any radiation exposures). 


Self Reading Pocket Dosimeters (SRPDs) are used in a ratio of one dosimeter

for every five Visitors during tours of Jefferson Lab radiologically controlled areas.


6.0            Revision Summary


Periodic Review – 02/29/16 – No changes per TPOC

Revision 1.1 – 11/29/12 – Added link to Visitor Safety Handout

Revision 1.0 – 01/21/11 – Updated to reflect current laboratory operations.











ESH&Q Division

Bob May





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 2/29/2016.

[1] Jefferson Lab Public Area Designation: CEBAF Center’s (Building 12) common areas, common rooms, and hallways are designated as Public Areas during core business hours Monday – Friday under the DOE Foreign Visits Program.