From: "Bruce, Just Bruce" <bruce.justbruce**At_Symbol_Here**GMAIL.COM>
Subject: [DCHAS-L] duct disposal
Date: Wed, 4 Jun 2014 16:03:47 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: CANPNGOu=y5cORQ2j-9pxtReZ9-gfYEBr-qTy=3Zua9Z=4PbvMA**At_Symbol_Here**

Michele - Kyle answered your question well, but I will add a couple of things to consider.

If the hoods were used with long-lived radioactive isotopes, it would be prudent to take swipes inside the ductwork.

If the hoods were used with perchloric acid and they were not perchloric acid hoods (with a wash-down), you have an entirely different (and much more serious) problem on your hands.

Good luck!

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