DURING SEP--DEC 1999, RESPONDENT CONDUCTED A SELF-AUDIT OF ALL ITS DOMESTIC AIRPORT FACILITIES, REPORTED THAT IT HAD P OTENTIALLY VIOLATED SECTION 211(G) OF THE CAA, 42 USC SECTIO N 7545(G), AND THEREGULATIONS ISSUED UNDER 40CFR PART 80, AN D REQUESTED THE APPLICATION OF EPA'S SELF-DISCLOSURE POLICY . RESPONDENT REPORTED THAT AT 4 AIRPORTS IT MAY HAVE USED FUEL WITH A POSSIBLE SULFUR CONTENT GREATER THAN 0.05 WEIGHT PERCENT TO FUEL THIRTY-NINE VEHICLES THAT WERE POTENTIALLY MOTOR VEHICLES. USE OF SUCH FUEL IN A MOTOR VEHICLE CONSTIT UTES A VIOLATION OF SECTION 211(G) OF THE CAA AND CFR 80.29.