On May, 2004, EPA promulgated new requirements for non-road diesel fuel. One of the provisions of this final rule, explained in Subpart I of 40 CFR Part 80, requires that each test facility must meet specified accuracy and precision criteria with their chosen test method for sulfur in on-road or non-road diesel fuel additives and/or diesel fuel. Evidence of having met these requirements must be submitted to and approved by the Agency before using the method to make measurements for demonstrating compliance. There are separate accuracy and precision criteria for diesel fuels and additives subject to the two sulfur standards--15 ppm and 500 ppm. Depending on your test facility situation, you may be required just to meet the 15 ppm diesel sulfur accuracy and precision criteria, you may choose to meet the 500 ppm diesel sulfur accuracy and precision criteria, or may be required to meet both of these accuracy and precision criteria. For diesel fuel at the 500 ppm sulfur level, if your test facility has chosen to use the designated test method, ASTM D 2622-03, or any of the following alternative test methods, ASTM D 4294-03, ASTM D 5453-03a, or ASTM D 3120-03a with correlation to the designated test method, it is not necessary for your test facility to qualify these methods for precision or accuracy.

Title from title screen (viewed on Jul. 25, 2012). "May 2005 (minor revisions January 22, 2009)." "OMB control number: 2060-0308, expiration date: December 31, 2011." "February 2009." "EPA-420-B-09-005."