The contingency plan must be reviewed, and immediately amended, if necessary, whenever:
(a) Applicable regulations are revised;
(b) The plan fails in an emergency;
(c) The generator facility changes - in its design, construction, operation, maintenance, or other circumstances - in a way that materially increases the potential for fires, explosions, or releases of hazardous waste or hazardous waste constituents, or changes the response necessary in an emergency;
(d) The list of emergency coordinators changes; or
(e) The list of emergency equipment changes.