UC Davis Departmental Safety Coordinator Meeting Brooke Stahmer University Sales Specialist (916) 207-4637 Cell Brooke.stahmer@airgas.com

Today’s Goal Brief overview of a few very in depth topics Examples and best practice’s The ISEE program overview

Liquid Nitrogen Withdrawal Device ¼” Turn for safe use Pressure Relief Safety Vent Most secure way to use LN2

Cryogenic Safety

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Moving Liquid Containers Lift vs. Roll Push vs. Pull Beware of Rough Surfaces/Slots/Crevasses/Grates Liquid Cylinders With Castors are Not for Rough Surfaces

What causes oxygen deficiency? Vaporization of cryogenic liquids (except oxygen) in an enclosed area. Air Contains 78% Nitrogen, 21% Oxygen < 19.5% Oxygen, Risk of Oxygen Deprivation Rapid Nitrogen Venting Increases Nitrogen Concentration, One Volume of LN2 = 696 Volumes of Gas Little Warning Odorless, Colorless Symptoms Light Headed, Dizziness, Drowsiness, Unconsciousness, Death

Oxygen Deficiency Monitors Oxygen Monitor Alarms <19.5% O2 Audible Flashing Light Inside Room Outside Room Portable O2 Monitor!

Cylinder Storage Best Practices Understand the properties and hazards Know your SDS Secure cylinders with 1-2 points of contact to wall, floor, workbench or cart. Know the requirements per hazard class Store the cylinders in a safe place Secure to a fixed object or cart Always store with cap on Never near an electrical outlet 3 or more cylinders should be nested

Incompatibility Table The table below provides criteria for separating hazardous materials: Type Material Nonflammable Gas Flammable Oxidizing Highly Toxic & Toxic Gas __ C Flammable Gas 20 feet or separation Oxidizing Gas Corrosive Gas C - compatible

SDS and Data Sheets

The Right Range of Supply Tube Trailers, Bulk TT 45,100 / 181,155 SCF Bulk 500 - 13,000 Gallon 46,500 – 1.2 mm SCF MicroBulk 230 / 450 / 1,000 / 1,500 Liter 61 / 119 / 264 / 396 Gallon 5,658 / 11,070 / 24,600 / 36,900 SCF Dewars 230 / 180 Liter 61 / 48 Gallon 5,658 / 4,428 SCF 300 / 200 Size 304 / 228 SCF Cylinders

Increase Laboratory Safety Centrally locate cylinders within the work area Wall mounted regulators Floor space savings Increase safety Consider future requirements Lecture Bottle Rental

Ways To Reduce Cylinder Handling

Safety of Personnel/Facility I SEE Program Safety of Personnel/Facility Efficiency of Gas/Cryo Systems Equipment Reliability & Capability

Do you want personalized help? Personalized in depth lab assessment (ISEE)? Specialty Gas storage questions? Redeployment of surplus equipment? Lecture bottle disposal opportunities? Need a safe cost effective gas supply system change? Questions on where to get some of the cryogenic accessories? Brooke Stahmer University Sales Specialist (916) 207-4637 Cell Brooke.stahmer@airgas.com