Home Ask The Haz Mat Guys ATHMG004 – Ask the Haz Mat Guys, Part IV

ATHMG004 – Ask the Haz Mat Guys, Part IV


In this episode, we answer the following questions:

  • What is an IBC?
  • Do we need to wear long-sleeved shirts and pants under Level A suits?
  • What’s the difference between CAS numbers and RTECS numbers in the NIOSH?
  • How do we stay in compliance with new NFPA garment standards?

Complete Show Notes

0:55 Question #1 – What is an IBC?

  • IBC stands for intermediate bulk container (usually referred to as a tote) – can be flexible or rigid
  • Found in the United Nations recommendations on the transportation of dangerous goods
  • Can carry anything from aviation fuels and gasoline to corrosives and pellets
  • Also come in the form of sacks, walled bags, and 55-gallon drums
  • Capacities up to 400 gallons and pressures up to 100 psi

2:10 Question #2 – Do We Need to Wear Long-Sleeved Shirts and Pants Under Level A Suits?

  • You don’t have to wear any kind of ensemble inside your Level A, but people usually do because it’s comfortable (and recommended)
  • OSHA 1910.120 provides suggestions on what to wear with/inside your Level A – includes hardhats, long-sleeved pants, long-sleeved shirts, and more – but they’re all listed as being optional
  • Mike wears scrub pants inside his Level A – keeps the rubber of the suit from rubbing up against your skin and pinching you
  • NFPA 1991 briefly describes undergarments, but only in the section on the flame test where a dummy is wearing an undergarment with his Level A

4:55 Question #3 – What’s the Difference Between CAS Numbers and RTECS Numbers in the NIOSH?

6:10 Question #4 – How Do We Stay in Compliance with New NFPA Garment Standards?

  • New standard only applies to suits made and purchased after the publication of the standard
  • You don’t have to get rid of your existing suits just because they don’t satisfy the new standard – just make sure they’re in working order and satisfy the standard they were created under

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