CSC Specimen Validity Testing & Adulteration Detection 3

Question 1

What does a laboratory result of 'invalid' mean in the context of federal workplace drug testing?

Accepted Answer

The specimen could not be tested due to interfering substances or an unidentifiable characteristic

Answer

The donor tested positive for an illegal substance

Answer

The specimen was lost or damaged during transport

Answer

The chain of custody form was improperly completed

Question 2

Which combination of results confirms a specimen is 'substituted' per federal drug testing criteria?

Accepted Answer

Creatinine less than 2 mg/dL and specific gravity less than 1.0010

Answer

pH above 9.0 and creatinine above 30 mg/dL

Answer

Specific gravity above 1.0200 and pH below 4.0

Answer

Creatinine between 2 and 20 mg/dL and specific gravity between 1.0010 and 1.0030

Question 3

A collector directly observes a donor adding a substance from a concealed vial to their specimen cup. What is the correct immediate action?

Accepted Answer

Stop the collection, document the attempted adulteration on the CCF, and notify the DER

Answer

Confiscate the vial and test the specimen as collected

Answer

Ask the donor what the substance was before deciding how to proceed

Answer

Allow the donor to complete collection and send the specimen with a note

Question 4

What is the primary purpose of retaining the split specimen (Bottle B) in federal workplace drug testing?

Accepted Answer

To allow the donor to request retesting of the same collection at a different HHS-certified laboratory

Answer

To run a second drug panel for additional substances

Answer

To provide a backup specimen in case Bottle A is lost

Answer

To enable the MRO to conduct an internal confirmation test

Question 5

A specimen is reported by the laboratory with a pH of 11.5 and no other anomalies. How should this result be classified?

Accepted Answer

Adulterated

Answer

Dilute

Answer

Substituted

Answer

Invalid

Question 6

Who is responsible for receiving final drug test results from the MRO and taking appropriate employment action in federal workplace testing?

Accepted Answer

The Designated Employer Representative (DER)

Answer

The specimen collector

Answer

The HHS-certified laboratory director

Answer

The collection site supervisor

Question 7

When a federal drug test result is reported as 'dilute negative,' what option does the employer have under DOT regulations?

Accepted Answer

Direct an immediate recollection under direct observation

Answer

Automatically report the result as a refusal to test

Answer

Accept the negative result with no further action required by regulation

Answer

Require the donor to retake the test within 30 days