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

An 'invalid' result means the laboratory could not obtain a valid drug test result because the specimen contained interfering substances or had unresolvable characteristics.

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

A substituted specimen is defined by both criteria being met: creatinine less than 2 mg/dL AND specific gravity less than 1.0010, indicating it is not consistent with normal human urine.

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

Witnessed adulteration requires the collector to immediately stop the collection, fully document the incident on the CCF, and notify the Designated Employer Representative (DER).

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

The split specimen (Bottle B) allows the donor to exercise their right to request an independent retest at a different HHS-certified laboratory if they dispute a verified positive result.

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

A pH of 11.5 is above the 9.0 upper limit of physiological range, indicating the specimen has been chemically adulterated with an alkaline substance.

(CSC) Certified Specimen Collector Practice Test

(CSC) Certified Specimen Collector Practice Test

CSC Specimen Validity Testing & Adulteration Detection 3