Labconco Protector XL Floor-Mounted (Walk-In) Laboratory Fume Hoods 1128 Series - Manuel (Page 42)

Chapter 5: Using Your Protector XL
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Original instructions
Unloading Materials and Equipment

Objects in contact with contaminated material should be surface
decontaminated before removal from the hood.

All open trays or containers should be covered before being removed from
the hood.
Shutdown

Turn off the fluorescent light and hood blower, then close the sash.