[Code of Federal Regulations]
[Title 49, Volume 1]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR40.87]

[Page 604-605]
 
                        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. 40.87  What are the cutoff concentrations for initial and confirmation tests?

    (a) As a laboratory, you must use the cutoff concentrations 
displayed in the following table for initial and confirmation drug 
tests. All cutoff concentrations are expressed in nanograms per 
milliliter (ng/mL). The table follows:

------------------------------------------------------------------------
                                     Initial
    Type of drug or metabolite         test         Confirmation test
------------------------------------------------------------------------
(1) Marijuana metabolites........           50  ........................
(i) Delta-9-tetrahydrocanna-binol-              15
 9-carboxylic acid(THC).
(2) Cocaine                                300  150
 metabolites(Benzoylecgonine).
(3) Phencyclidine (PCP)..........           25  25
(4) Amphetamines.................         1000  ........................
(i) Amphetamine..................  ...........  500

[[Page 605]]


(ii) Methamphetamine.............  ...........  500 (Specimen must also
                                                 contain amphetamine at
                                                 a concentration of
                                                 greater than or equal
                                                 to 200 ng/mL.)
(5) Opiate metabolites...........         2000  ........................
(i) Codeine......................  ...........  2000
(ii) Morphine....................  ...........  2000
(iii) 6-acetylmorphine (6-AM)....  ...........  10 (Test for 6-AM in the
                                                 specimen. Conduct this
                                                 test only when specimen
                                                 contains morphine at a
                                                 concentration greater
                                                 than or equal to 2000
                                                 ng/mL.)
------------------------------------------------------------------------

    (b) On an initial drug test, you must report a result below the 
cutoff concentration as negative. If the result is at or above the 
cutoff concentration, you must conduct a confirmation test.
    (c) On a confirmation drug test, you must report a result below the 
cutoff concentration as negative and a result at or above the cutoff 
concentration as confirmed positive.
    (d) You must report quantitative values for morphine or codeine at 
15,000 ng/mL or above.