(a) Any refiner who produces gasoline by blending blendstock into PCG, as defined at §80.2(d), must meet the requirements of §80.1630 to sample and test every batch of gasoline as follows:

(1) Exclude the PCG for purposes of demonstrating compliance with the sulfur standards of this subpart O.

(2) To accomplish the exclusion required in paragraph (a)(1) of this section, the refiner must determine the volume and sulfur content of the PCG used at the refinery and the volume and sulfur content of the gasoline produced at the refinery, and use the compliance calculation procedures in paragraphs (a)(3) and (4) of this section.

(3) For each batch of PCG that is used to produce gasoline the refiner must include the volume and sulfur content of the PCG as a negative volume and a positive sulfur content in the refiner's compliance calculations in accord with the requirements at §80.1603.

(4) For each batch of gasoline produced at the refinery using PCG and blendstock, the refiner must determine the volume and sulfur content of the combined product and include each batch of combined product for purposes of sulfur compliance in the refinery's compliance calculations at §80.1603 without regard to the presence of previously certified gasoline in the batch.

(5) The refiner must use any PCG that it includes as a negative batch in its compliance calculations pursuant to §80.1603 as a component in gasoline production during the annual averaging period in which the PCG was included as a negative batch in the refiner's compliance calculations.

(6) The refiner must also comply with §80.65(i) when producing RBOB or RFG and §80.101(g)(9) when producing conventional gasoline or CBOB.

(7) Any negative annual average sulfur value shall be reported as zero and not as a negative result.

(b) In the alternative, a refiner may sample and test each batch of blendstock when received at the refinery to determine the volume and sulfur content, and treat each blendstock receipt as a separate batch for purposes of compliance calculations for the annual average sulfur standard and for reporting. This alternative applies only if every batch of blendstock used at a refinery during an averaging period has a sulfur content that is equal to, or less than, the applicable per-gallon cap standard under §80.1603.

(c) Refiners who blend only butane into PCG may meet the sampling and testing requirements of this subpart O for sulfur by using sulfur test results of the butane supplier, provided that the requirements of §80.82 are met.

(d) Refiners who blend only blender grade pentane into PCG may meet the sampling and testing requirements of this subpart O for sulfur by using sulfur test results of the pentane supplier, provided that the requirements of §80.85 are met.

[79 FR 23655, Apr. 28, 2014, as amended at 80 FR 9100, Feb. 19, 2015]