What is the minimum reporting threshold for a positive test for amphetamines?

Prepare for the DOT Collector Qualification Test. Utilize flashcards and multiple-choice questions with hints and explanations. Equip yourself for success!

The minimum reporting threshold for a positive test for amphetamines is established based on criteria from the Department of Health and Human Services (HHS). For initial testing, the threshold is set to 500 ng/mL, meaning that a specimen must contain at least this concentration for the test to be considered positive.

For confirmation testing, which is more specific and typically conducted using methods such as gas chromatography/mass spectrometry (GC/MS), the threshold is set to 250 ng/mL. This two-tiered approach—initial screening followed by confirmation—helps to ensure the reliability of positive test results, reducing the likelihood of false positives due to cross-reactivity or other factors.

The other options do not align with these established thresholds for amphetamines: thresholds that are either lower or higher do not meet regulatory standards. Thus, the correct choice accurately reflects the minimum reporting threshold as outlined in federal guidelines.

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