40 CFR § 86.151-98 - General requirements; refueling test.
(a) The refueling emissions procedure, shown in Figure B98-12, starts with the stabilizing of the vehicle and the loading of the refueling emissions canister(s) to breakthrough, and continues with the vehicle drive for purging of the canister, followed by the refueling emissions measurement. The test is conducted following §§ 86.152-98 through 86.154-98 in order.
(b) Ambient temperature levels encountered by the test vehicle throughout the test sequence shall not be less than 68 °F (20 °C) nor more than 86 °F (30 °C).
(c) The vehicle shall be approximately level during all phases of the test sequence to prevent abnormal fuel distribution.