CSC Workplace Drug Testing Programs Flashcards

Which five drug classes are included in the standard DOT 5-panel urine drug test?

Answer: Marijuana, cocaine, opioids, amphetamines, phencyclidine (PCP)

The DOT 5-panel test screens for marijuana metabolites (THC), cocaine, opioids, amphetamines/methamphetamines, and PCP.

What is the initial test cutoff concentration for marijuana metabolites (THCA) in DOT urine drug testing?

Answer: 50 ng/mL

The DOT initial screening cutoff for marijuana metabolites is 50 ng/mL, with a confirmation cutoff of 15 ng/mL by GC-MS.

What does a 'dilute' specimen result indicate in a DOT drug test?

Answer: The specimen has creatinine and specific gravity below normal range, suggesting excessive fluid intake

A dilute specimen has creatinine between 2–20 mg/dL and specific gravity between 1.001–1.003, indicating the donor consumed excessive fluids.

What is the primary role of a Substance Abuse Professional (SAP) in a DOT drug testing program?

Answer: Evaluate employees who violated drug or alcohol rules and recommend education, treatment, and follow-up testing

The SAP evaluates the employee, prescribes treatment or education, and determines return-to-duty and follow-up testing requirements.

Under DOT FMCSA rules, when is pre-employment drug testing required for commercial motor vehicle drivers?

Answer: Before the first time a driver performs safety-sensitive functions for the employer

DOT FMCSA requires a negative pre-employment drug test result before a driver is permitted to perform any safety-sensitive function for the employer.

What is the regulatory consequence when a laboratory reports a urine specimen as 'substituted'?

Answer: The MRO reports it as a refusal to test, carrying the same consequences as a positive result

A substituted specimen — with creatinine below 2 mg/dL and specific gravity outside 1.001–1.020 — is treated as a refusal to test by the MRO.