Labconco Protector Stainless Steel Radioisotope Laboratory Fume Hoods 1208 Series - Manuel (Page 34)

Chapter 5: Using the Protector Radioisotope
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Original instructions
Final Decontamination

Water washdown or flooding the surfaces with water is standard practice
and results in about 50% reduction of contamination on the 304 stainless
steel liner material due to radiochemicals.

A secondary means of surface decontamination involves the use of organic
solvents that can result in up to 75% reduction of contamination due to
radiochemicals.

Even though 304 stainless steel seams are smooth to the touch, there are
microscopic voids within the surface in which radioactive particles can
lodge and are not easily removed except by abrasion decontamination.
Abrasion decontamination consists of sanding and/or scouring operations
to dislodge radioactive particles from the stainless steel hood liner.
Shutdown

Only turn off the fluorescent light and hood blower if final washdown is
complete, and then close the sash.