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RE: DOT SURVEYS




Jim:

The limits in 49 CFR 443, Table 10 are per square cm.  The reg states   that levels of non-fixed contamination may be determined by wiping an   area of 300 cm2.  Personnel who are trained to take 100 cm2 wipes, may do   so on package surfaces.  You must have a sufficient number of wipes in   appropriate locations for your application.  In order to use Table 10,   you would have to calculate the activity per cm2.  It was my   understanding that these surveys are required for those who offer Class 7   material for shipment, not those who receive it.  DOT only has   jurisdiction on material in transit.  Normally your site specific   procedures govern receipt surveys.

Tony Sorensen, RSO
Varian Oncology Systems
tony.sorensen@os.varian.com

 ----------
From:  radsafe[SMTP:radsafe@romulus.ehs.uiuc.edu]
Sent:  Friday, September 19, 1997 9:06 AM
To:  Multiple recipients of list
Subject:  DOT SURVEYS


     Radsafers,
       
     As I understand the DOT and NRC regulations, the contamination   limits
     for receipt surveys of packages are listed "per 300 cm sq".  What is   
     the accepted interpretation of this limit:
       
                a.  Does it mean that the surveyor must survey at least   50
     cm sq over the 6 sides of a boxed package?
       
                b.  Does it mean that the surveyor can survey 100 cm sq   and
     relate the results to 300 cm sq equivalent?
       
                c.  Does it mean that the surveyor can survey 300 cm sq   on
     the side of the package most likely to indicate contamination?
       
                d.  None of the above
       
     Thanks in advance for your assistance.
       
     Jim Reese
     Health Physicist
     Defense Logistics Agency
     jreese@ddrw.dla.mil



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Subject: DOT SURVEYS
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