U.S. EPA has released a revised version of its SPCC Guidance for Regional Inspectors.  It is "intended to assist regional inspectors in reviewing a facility's implementation of the Spill Prevention, Control, and Countermeasure (SPCC) rule at 40 CFR part 112 *** [and is made]available to owners and operators of facilities that may be subject to the requirements of the SPCC rule, and the general public on how EPA intends the SPCC rule to be implemented. The document is designed to provide a consistent national policy on several SPCC-related issues."

For a copy, including explanatory materials, see here.