CLASS A:
Immediately dangerous to life. Rescue procedures require the entry of more than one individually fully equipped with life support equipment. Maintenance of communication requires an additional stand-by person stationed within the confined space.
Parameters:
Oxygen 16% or less
25% or greater
Flammability 20% or greater LFL*
Toxicity IDLH**
CLASS B:
Dangerous but not immediately life threatening. Rescue procedures require the entry of no more
than one individual fully equipped with life support equipment. Indirect visual or auditory communication.
EXHIBIT A
Parameters:
Oxygen 16.1 to 19.4%
21.5 to 25%
Flammability 10-19% of LFL*
Toxicity Greater than contamination level referenced in 29 CFR 1910 subpart Z but less than IDLH**
CLASS C:
Potential hazard. Requires no modifications of work procedures. Standard rescue procedures.
Direct communication with workers from outside the confined space.
Parameters:
Oxygen 19.5 to 21.4%
Flammability 10% of LFL* or less
Toxicity Less than contamination referenced in 29 CFR 1910 subpart 2
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*LFL = Lower flammable limit
**IDLH = Immediately dangerous to life or health
CONFINED SPACE ENTRY PROCEDURES
1. If manhole on street, erect traffic safety equipment.
2. If space contains electrical equipment, shut off and lock out all equipment.
3. Test confined space for O2 deficiency, combustible and toxic elements. If atmosphere is normal, proceed with items 4, 5, 6.
If gases or O2 deficiency is found, perform 4, 7, 8.
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4. If sediments or organic decomposing materials exist in confined space, hose or flush out.
5. If atmosphere tests to be normal, entry can made if individual wears safety harness and rope attended by two individuals outside confined space with self-contained breathing apparatus readily available.
6. Individuals outside confined space continuously monitor atmosphere and provide ventilation.
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7. If O2 deficiency or gases are found, ventilate atmosphere with pure air supply until atmosphere checks to be normal (fifteen to twenty minutes).
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8. Individual can then enter confined space wearing safety harness, with ventilation continuing and if attended by two individuals outside space, with self-contained breathing apparatus readily available, continuously monitoring confined space atmosphere.
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9. If confined space contains combustible or toxic gases and/or is O2 deficient and ventilation is not possible, THE SPACE SHOULD NOT BE ENTERED, except under dire emergency (to save life). Then enter only if using a self-contained breathing apparatus and exercising extreme caution to avoid ignition of flammable gases.
CONFINED SPACE ENTRY RECORD CARD
JOB DESCRIPTION: ____________________________________
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LOCATION: _____________ DATE: ___________
EMPLOYEES ASSIGNED: ________________________
HAVE THE FOLLOWING PRECAUTIONS BEEN TAKEN?
( ) YES ( ) NO Has necessary traffic safety equipment been set up?
( ) YES ( ) NO Has all electrical equipment been locked out?
( ) YES ( ) NO Was area cleaned of sediment or deposition?
( ) YES ( ) NO Was purging or ventilation required or used?
( ) YES ( ) NO Were lifelines and harness worn by those entering?
( ) YES ( ) NO Was rescue equipment tested and operable?
SAMPLING EQUIPMENT USED:
TYPE SERIAL # DATE BY CALIBRATED WHOM
_____ _____ _______ ____________________
_____ _____ _______ ____________________
_____ _____ _______ ____________________
TESTS CONDUCTED Time TIME RESULTS TIME RESULTS
O2 Deficiency _____ ______________ _____________
Combustibility _____ ______________ _____________
Toxicity _____ ______________ _____________
LIST SAFETY EQUIPMENT USED:
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________________________________________________________________
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Foreman Superintendent
I HAVE RECEIVED A COPY OF THE CITY CONFINED SPACE ENTRY POLICY AND PROCEDURE. I HAVE READ AND UNDERSTAND THE POLICY.
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(Employee’s Name) PRINT DATE
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(Employee’s Signature) PRINT DATE