Confined Space Precautions


                       A SAFETY TALK FOR

                      DISCUSSION LEADERS



This safety talk is designed for discussion leaders to use in

preparing safety meetings.



Set a specific time and date for your safety meeting.  Publicize

your meeting so everyone involved will be sure to attend.



Review this safety talk before the meeting and become familiar with

its content. Make notes about the points made in this talk that

pertain to your workplace.  You should be able to present the

material in your own words and lead the discussion without reading

it.



Seating space is not absolutely necessary, but arrangements should

be made so that those attending can easily see and hear the

presentation.



Collect whatever materials and props you will need ahead of time. 

Try to use equipment in your workplace to demonstrate your points.





                      DURING THE MEETING



Give the safety talk in your own words.  Use the printed talk

merely as a guide.



The purpose of a safety meeting is to initiate discussion of safety

problems and provide solutions to those problems.  Encourage

employees to discuss hazards or potential hazards the encounter on

the job. Ask them to suggest ways to improve safety in their area.



Don't let the meeting turn into a gripe session about unrelated

topics.  As discussion leader, its your job to make sure the topic

is safety.  Discussing other topics wastes time and can ruin the

effectiveness of your safety meeting.



At the end of the meeting, ask employees to sign a sheet on the

back of this talk as a record that they attended the safety

meeting.  Keep this talk on file for your records.











Confined Space Precautions



Special caution must be taken when working in a closed,

unventilated area. By using the proper personal protective

equipment and taking precautions, you help assure that the working

environment is hazard-free.



However, under no circumstances, enter a sewer, manhole,

underground chamber, conduit or any other confined space without

first taking the proper safety precautions.



Think before you enter a confined space. People have died because

they didn't.



Follow these procedures:



ù Don't enter a confined space if you can perform the job from the

outside.



ù Open doors or remove covers and air out the area as long as

possible.



ù Blank-out inlet and outlet lines whenever possible; lock all

valves in the closed position and turn all switches off to be sure

that the area is closed off as much as possible.



ù Blow air, steam or both into the space to be entered or exhaust

the air in the confined space in some way.



ù Test for combustible gas, oxygen deficient atmospheres (carbon

dioxide), carbon monoxide and other suspected gases, including

methane, hydrogen sulfide and nitrogen.



ù Always put on a harness and lifeline (with standby personnel

attached to the persons inside). Continue to test the air while

entering the confined space. If oxygen in the air is less than 19

percent, anyone who breathes it without a respirator could become

unconscious.



ù All electrical equipment must be explosion-proof.



ù If the atmosphere is dangerous, wear an approved air line or

self-contained breathing apparatus.



ù Whenever the confined space is re-entered, check conditions

again. Keep records of the test results and all persons who entered

the area.



Most of what we have discussed so far relates to respirators;

however, some conditions require complete body protection because

some gases or vapors, such as hydrogen cyanide, can be absorbed

through the skin.







Never forget that a chamber that is safe one day may be deadly the

next time you enter it. This is because when there is a rapidly

falling barometer, indicating decreasing atmospheric pressure,

oxygen could be replaced in the chamber by another agent, such as

carbon dioxide.



Before entering a sewer or confined pit, ask yourself these

questions. Your life could depend on it.



ù Has organic matter used up all of the oxygen?



ù Has fermentation produced suffocating carbon dioxide?



ù Has decomposition created an explosive mixture?



ù Has a chemical reaction created dangerous hydrogen sulfide,

carbon monoxide or other toxic substances?

Text Version