80.66—Calculation of reformulated gasoline properties.
(a)
All volume measurements required by these regulations shall be temperature adjusted to 60 degrees Fahrenheit.
(b)
The percentage of oxygen by weight contained in a gasoline blend, based upon its percentage oxygenate by volume and density, shall exclude denaturants and water.
(c)
The properties of reformulated gasoline consist of per-gallon values separately and individually determined on a batch-by-batch basis using the methodologies specified in § 80.46 for each of those physical and chemical parameters necessary to determine compliance with the standards to which the gasoline is subject, and per-gallon values for the VOC, NOX, and toxics emissions performance standards to which the gasoline is subject.
(d)
Per-gallon oxygen content shall be determined based upon the weight percent oxygen of a representative sample of gasoline, using the method set forth in § 80.46(g). The total oxygen content associated with a batch of gasoline (in percent-gallons) is calculated by multiplying the weight percent oxygen content times the volume.
(e)
Per-gallon benzene content shall be determined based upon the volume percent benzene of a representative sample of a batch of gasoline by the method set forth in § 80.46(e). The total benzene content associated with a batch of gasoline (in percent-gallons) is calculated by multiplying the volume percent benzene content times the volume.
(f)
Per-gallon RVP shall be determined based upon the measurement of RVP of a representative sample of a batch of gasoline by the sampling methodologies specified in appendix D of this part and the testing methodology specified in appendix E of this part. The total RVP value associated with a batch of gasoline (in RVP-gallons) is calculated by multiplying the RVP times the volume.
(g)
(1)
Per gallon values for VOC and NOX emissions reduction shall be calculated using the methodology specified in § 80.45 that is appropriate for the gasoline.
(i)
For gasoline subject to the simple model, the methodology under § 80.42 that is appropriate for the gasoline; and
(ii)
For gasoline subject to the complex model, the methodology specified in § 80.45 that is appropriate for the gasoline.
(3)
The total VOC, NOX, and toxic emissions performance reduction values associated with a batch of gasoline (in percent reduction-gallons) is calculated by multiplying the per-gallon percent emissions performance reduction times the volume of the batch.