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Confined Space

Confined Space Training

aaron stulc

on 24 May 2010

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Transcript of Confined Space

Permit Required Confined Spaces Goals Review criteria for confined spaces and permit-required confined spaces Describe the hazard which exist in permit required confined spaces Describe the steps in developing a permit required confined space program Review Training Requirements Why? Worker died entering an 8 foot vault to bleed a line Meter reader died due to methane and CO in a meter vault Two sewer workers and police officer died at the bottom of a pumping station Does MDT have Confined Spaces? What is a confined space? What is a Permit Required Confined Space? Large enough for the whole body to enter and work, and has restricted entry or exit, and Is not designed for continuous occupancy Contains or POTENTIALLY contains a hazardous atmosphere has a potential for engulfment has a dangerous configuration contains any other recognized serious safety or health hazard Evaluating Permit-Required Confined Spaces Hazardous Atmosphere low or high oxygen content Flammable gas, vapor or mist in excess of 10% of its explosive limit Any chemical in concentration which is capable of causing death, incapacitation, ability to self rescue, or cause acute illess Air monitoring Causes of deficient oxygen atmosphere Corrosion/rusting activity

Dead animal or rotted vegitation

Sealed/closed for a long period of time

Was purged previously Hydrogen Sulfide H2S Carbon Monoxide CO Commonly found in sewers and can be instantly fatal at high levels. Disturbing sludge can release. From interanl combustion and propane powered engins. Fatal levels are quickly reached in confined spaces Your nose won't work CO is oderless H2S fatigues you nose
so you smell at low concentration but it goes away Other atmospheric hazards WELDING Fumes from residue in storage tanks Chemical you may be introducing into a confined space Engulfment Isolate engulfment hazards blank or blind
misalign or remove section of pipe, lines, or ducts
double block and bleed system
lockout all sources of energy
disconnect all mechanical linkages Hazardous Configuration interal configuration such that an entrant can be trapped or asphyxiated MAG TANKS moving parts
hydraulic lines
falling objects
standing water obscuring opening
anything you recognize
mag tanks
sump pits
pump stations
oil water seperators
crawl spaces
pug mill hopper So what can we do? Can the hazard(s) in the confined space be ELIMINATED?
no potential atmospheric hazard Is the ONLY hazard in the confined space an actual or POTENTIAL atmosperic hazard? Re-classify There must be documentation detailing that the hazards have been eliminated. The "certification" must contain the date, location, and signature of the person certifying. Must be available to all entrants THERE CAN BE NO REAL OR POTENTIAL ATMOSHERIC HAZARD Example entering a hopper on the pug mill the only hazard is the potential of accidental startup and mean of egress Must follow the lock out procedure must document the lockout procedure with date, location and signature During the time that the equipment is properly locked out it is not considered a PRCS. After it is put back into service it is a PRCS Alternate Entry any vault or pit with poor or no ventilation can not be re-classified for tanks vaults etc with no other hazard execept atmosperic 1. verfication is made that using continuous forced air ventilation is safe 2. monitoring and inspection data supports that atmospheric hazard is the only hazard, and forced air ventilation is effective 3. data is documented and made available to the entrant(s) Example entering a pit with potential atmospheric hazards, to access water control valves 2. the atmosphere must be tested with a gas meter before entry 1. Forced ventilation must be set up to flush the space with fresh air. Run continuously. 3. the atmosphere must be continuoulsy monitored every time entry is made no other hazard may exist Entering Permit-Required Confined Spaces Must have a written permit when
spaces cannot be reclassifed
or alt. entry cannot be done Rules of Entry Entry Supervisor Attendant Entrant Knows the hazards, symptoms and consequences Verifies the permit by determining acceptable entry conditions Authorizes entry oversees operations terminates entry verifies rescue services removes unauthorized individuals may serve as the attendant (if necessary) Supervisor Attendant monitors entrants monitors hazards in and outside of the space remains outside of entry point communicates with entrant(s) controls entry point summons rescuers initiates non-entry rescue if required Entrant Uses eqipment properly Communicates regularly with the attendant If the unexpected occurs - alert the attendant Exits immediately if hazard(s) develop all members of the crew must understand the hazards, symptoms and consequeces of the entry Ventilation Blowers and Fans must be appropraitely sized, explosion proof, and have clean intake how long to ventilate before entry? usually 30 minutes more or less depending ont he size of the space
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