In addition to any other procedure required under this subpart, an auditor must perform the procedures specified in this section for a gasoline manufacturer that relies on an in-line blending waiver under § 1090.1315.

(a)(1) Obtain a copy of the gasoline manufacturer's in-line blending waiver submission and EPA's approval letter.

(2) Confirm that the sampling procedures and composite calculations conform to the specifications in § 1090.1315(a)(2).

(3) Review the gasoline manufacturer's procedure for defining a batch for compliance purposes. Review available test data demonstrating that the test results from in-line blending correctly characterize the fuel parameters for the designated batch.

(4) Confirm that the gasoline manufacturer corrected their operations because of previous audits, if applicable.

(5) Confirm that the equipment and procedures have not materially changed from the gasoline manufacturer's in-line blending waiver. In cases of material change in equipment or procedure, confirm that the gasoline manufacturer updated their in-line blending waiver and report any exceptions.

(6) Perform any additional procedures unique to the blending operation, as specified in the in-line blending waiver, and report any findings, variances, or exceptions, as applicable.

(7) Confirm that the gasoline manufacturer has complied with all provisions related to their in-line blending waiver and report any exceptions.

(b)(1) Obtain test data, including head, middle, and tail results, for each batch produced under the gasoline manufacturer's in-line blending waiver.

(2) Review the alternative sampling plan to meet requirements to test head, middle, and tail samples for small batches under § 1090.1315(a)(9).

(3) Report as a finding any instance where only a single sample was taken for a small batch involving more than 8 hours of blending or more than 1 million gallons of fuel.

(4) Report as a finding any instance where two samples were unevenly distributed for a small batch or where only two samples were taken for a small batch involving more than 16 hours of blending or up to 2 million gallons of fuel.

(5) Determine and report the percentage of in-line blending batches where the gasoline manufacturer failed to perform the required head, middle, and tail samples due to unforeseen circumstances. Report as a finding if this percentage is greater than 10 percent of in-line blending batches for the calendar year.

(6) Determine and report each instance where a contingency plan for alternative sampling was utilized under § 1090.1315(a)(12).