Limited Quantity SCO?

["Roy A. Parker" <70472.711@compuserve.com>]

Quang,
 
> Is there such thing as a "limited quantity SCO (surface contaminated
> object)"?
     No
 
> 49CFR173.421 talks about limited quantities of Class 7 materials
> and 173.427 talks about LSA and SCO. Are these mutually exclusive?
     Yes, limited quantity, LSA and SCO are all mutually exclusive.
 
> Reading 49CFR suggests that these could be packaged in a "strong,
> tight package...The shipment be exclusive use... and some other
> requirements. The question is whether the vehicle needs to be
> placarded.
     Strong, tight package only refers to LSA and SCO materials and this
     restricts you to exclusive use and requires placarding.
 
If shipped  as an  Radioactive  Material,  Excepted  Package  -  Limited
Quantity of  Material then  the various criteria for an excepted package
must be met; in general -
     Inside container marked RADIOACTIVE
     Package meets general packaging requirements 173.410
     Maximum surface radiation level not greater than 0.5 mrem/hr
     Excepted package notice in, on or with the package
 
An excepted  package -  limited quantity  of material  does not  require
placarding.
 
Roy A. Parker, Ph.D.
Radiation Physics Consultant to
Federal Express Corporation
E-Mail: 70472.711@compuserve.com
Tel: 504-924-1473
Fax: 504-924-4269
-------------( Forwarded computer archived letter follows )-------------
Radsafers:
Is there such thing as a "limited quantity SCO (surface contaminated
object)"? 49CFR173.421 talks about limited quantities of Class 7 materials
and 173.427 talks about LSA and SCO. Are these mutually exclusive?
Specifically, someone I know is facing with shipping, domestically,  some
very mildly contaminated plexi shields (P-32, P-33 as contaminants). The
amount/concentrations of activities are undoubtedly under the limits for
"limited quantities". Reading 49CFR suggests that these could be packaged
in a "strong, tight package...The shipment be exclusive use... and some
other requirements. The question is whether the vehicle needs to be
placarded. 173.427(a)(6)(v) requires that it be placarded according to
subpart F of part 172. Well, subpart F of part 172 (the placarding section)
says it does not need to be if the material is offered for transportation
as Limited Quantities.
Any comments or guidance would be appreciated. I apologize if this has been
discussed on Radsafe previously.
 
Quang Le
<qmle@icnpharm.com>