[Code of Federal Regulations]
[Title 49, Volume 1]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR40.95]

[Page 616]
 
                        TITLE 49--TRANSPORTATION
 
          Subtitle A--Office of the Secretary of Transportation
 
PART 40_PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING 
PROGRAMS--Table of Contents
 
                   Subpart F_Drug Testing Laboratories
 
Sec.  40.95  What criteria do laboratories use to establish that a specimen 
is adulterated?

    (a) As a laboratory, you must consider the primary specimen to be 
adulterated if you determine that--
    (1) A substance that is not expected to be present in human urine is 
identified in the specimen;
    (2) A substance that is expected to be present in human urine is 
identified at a concentration so high that it is not consistent with 
human urine; or
    (3) The physical characteristics of the specimen are outside the 
normal expected range for human urine.
    (b) In making your determination under paragraph (a) of this 
section, you must apply the criteria in current HHS requirements or 
specimen validity guidance.