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Test Result Verified Result Employer Action
Negative Negative
No Action
Negative—Dilute [ §40.197]
Negative No Action; or
Employer May Retest
Temperature Out of Range [§40.67] Inconclusive Retest Under Direct
Observation
Evidence at Collection of Specimen Inconclusive Retest Under Direct
Tampering/Substitution/Adulteration
[§40.67]
Observation
Positive [40.23] Positive—Rule Removal From Duty,
Violation
Refer to SAP, Employer
Consequence
Positive—Dilute [40.197] Positive—Rule Removal From Duty,
Violation
Refer to SAP, Employer
Consequence
Test Refusal/Adulteration/Substitution Test Refusal—Rule Removal From Duty,
[ §40.23; §40.191] Violation
Refer to SAP, Employer
Consequence
Insufficient Volume With Medical
Explanation (Random, Reasonable
Suspicion, Post Accident) [§40.193]
Cancelled
No Action
Insufficient Volume With Disability—No
Evidence of Illegal Drug Use (Preemployment,
Return to Duty, Follow Up)
[§40.195]
Negative
No Action
Insufficient Volume with Evidence of Cancelled
Assignment of Safety-
Illegal Drug Use (Pre-Employment,
Sensitive Duties
Return to Duty, Follow Up) Prohibited, Employer
Consequences
Insufficient Volume With No Medical Test Refusal—Rule Removal From Duty,
Explanation [§40.193] Violation
Refer to SAP, Employer
Consequences
Fatal Flaw/Rejected for Testing [§40.199]
Cancelled No Action
Invalid Result With Medical Explanation
[§40.159]
Cancelled
No Action
Invalid Result With No Medical Cancelled
Retest Under Direct
Explanation [§40.159] Observation
Primary Positive—Split Fails to Cancelled
Employer/MRO Notifies
Reconfirm Drug [ §40.187]
ODAPC
Primary Adulterated/Substituted—Split Cancelled
Employer/MRO Notifies
Fails to Reconfirm [ §40.187]
ODAPC
Primary Invalid—Split Fails to Reconfirm Cancelled
Retest Under Direct
[§40.187] Observation
Primary Non-negative—Split Unavailable Cancelled
Retest Under Direct
for Testing [ §40.187]
Observation
Figure 7-3. Summary of Test Results and Subsequent Employer Actions
Chapter 7. Drug Testing Procedures 7-28 August 2002