And one more site (then I'll quit, I promise
- this one from Chevrom.com - FAQs:
What are diesel dispenser pump labeling requirements?
The EPA regulations require that the sulfur content of all diesel dispensers in the United States, except California, be communicated to the diesel end-users, using new dispenser labels. This includes the S15 (ULSD), S500 (LSD), and S5000 (HSD) dispensers. The EPA has defined the text for each label and provides specifications as to where the label is to be located on the dispenser. This regulation applies to any dispenser; whether it is at a retail site, commercial site, or is for company's own use.
As of June 1, 2006 each diesel dispenser (except those dispensers in California) must have a label that correctly identifies the type of diesel fuel being sold from that dispenser. Initially, for most on-highway diesel dispensers this will be the S500 (LSD) label. When a dispenser is transitioned to the new ultra low sulfur diesel fuel, the S500 (LSD) or S5000 (HSD) label must then be removed from the dispenser and replaced by an S15 (ULSD) label.
In California, the state has mandated that ULSD be the only fuel available. Therefore, the EPA has exempted California from labeling dispenser pumps.