1703.1 If the octane rating measures within the 0.5 tolerance set forth in § 1700.1, the gasoline shall be deemed to have passed the octane rating test and the DCRA inspector shall continue to inspect the remaining octane ratings at the fueling station.

1703.2 If the measured octane rating of a tested gasoline is below the 0.5 tolerance set forth in § 1700.1, the DCRA inspector shall perform a second fuel-sample test by taking the following steps:

1. (a) Take a sample of the gasoline from the underground storage tank;
2. (b) Fill the liter-size cylindrical aluminum container with the desired gasoline to be tested;
3. (c) Transfer the gasoline to be tested to the portable octane analyzer sample holder jar;
4. (d) Place the portable octane analyzer sample holder jar in the portable octane analyzer or equivalent device for measurement;
5. (e) Measure the octane level of the gasoline sample using the portable octane analyzer or equivalent device;
6. (f) Determine whether the octane level is below the 0.5 tolerance set forth in § 1700.1;
7. (g) Retain the results from the portable octane analyzer; and
8. (h) Send the sample from the underground storage tank to the Motor Fuel Testing Lab of the Comptroller of Maryland or another testing lab authorized by the Director, as described in § 1704, if the octane level is below the 0.5 tolerance set forth in § 1700.1.

SOURCE: Final Rulemaking published at 63 DCR 4071 (March 18, 2016).