These tests would not address contamination by the terminal. Also, PTDs do not need to specify the precise sulfur content of the fuel, only that the fuel is compliant with the applicable sulfur standard. If minor contamination occurs, but the fuel still meets the applicable standard, it is not considered a violation, nor does EPA require it to be reported on a PTD.
Question and Answer was originally posted at Questions and Answers on the Clean Diesel Fuel Rules (PDF)(135 pp, 888 K, EPA420-B-06-010, July 2006, About PDF)