||[Jul. 22nd, 2011|11:33 am]
The cryo repair folk want me to run a full decontamination process on Zod, and to sign a statement that I've done so before they'll accept the dewar for a pump-down. Considering it's primary use is stainless steel cryo treatment, with occasional diversions to make ice cream, this seems a bit excessive. Still waiting on pricing and how to hand this off to them -- I'm assuming I can just drop it off at their Maryland office, about an hour away, as I'd really rather not ship it.|
biological decon? makes reasonable sense, somewhat...
what's that involve?
Nuke it from space--it's the only way to be sure.
Preparing the Shipment:
When returning units for repair, rehab or testing the following decontamination procedure must be performed prior to shipping your unit:
1. MVE Aluminum Dewars are constructed with an aluminum inner, which utilizes a fiberglass, neck support. The stainless units are constructed with an inner entirely fabricated from stainless steel sheets. The generally accepted practice of using 10% chlorine Bleach with 90% water solution still holds as the best method for decontaminating. However with some of the bovine and swine viruses showing up today, it is the conclusion that an increased mixture of chlorine bleach to 30% and 70% water will kill all viruses except Mad Cow Disease. Spraying the solution into the inner vessel is preferred, although agitation of the solution inside the inner will suffice. Vapor shippers will require filling the inner to its holding capacity with the cleaning mixture and then rinsing. Let stand for 30 minutes and remove. Rinse the decontaminated surfaces with clean water and remove rinse water. Allow Dewar to dry before putting into service. For Vapor shippers, this means to place Dewar on end (inverted) and allow to dry for 24 hours.
2. Contact Cryo for a RMA number.
3. Include this certificate of decontamination, signed.
4. The internal and exterior of this unit were cleaned with a solution that contained an approved germicide or equivalent in accordance with D.O.T. and C.D.C. regulations.
Just read about the decontamination process, doesn't seem difficult.
I'm just amused because this is never used to bio stuff. I did, when I first got it, wash it out with a strong bleach solution, but the prior owner claimed it was just used in a cryo metallurgy lab, iirc. Still, it won't hurt any to give it a good wash and dry, and if it makes them feel better about working with it, so much the better.