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How many follow-up tests are required after RTD?

Posted by StepByStep_Carlos · 467 views · 19 likes


My SAP evaluator said I need at least 6 follow-up tests over 12 months. A driver at a truck stop told me his SAP only required 3. Is there a minimum set by DOT or is it completely up to the SAP evaluator? Trying to understand what I'm committed to.