Appendix B. Data Used in Volume and Energy Calculations

The calculations used to estimate the per-gallon volume and energy changes are summarized in Tables B1-B5. Tables B1 and B2 summarize the volume impacts and display the energy content information used to derive the energy effects shown in Table 2. The energy calculations assumed all denaturant was gasoline and adjusted the base gasoline volume for the loss of C4 and C5 energy content where appropriate.

Tables B3-B5 display the calculations that derived the volumes shown in Table B1. The volume calculations use the RVP changes shown in Table 1. They also assume, based on industry information, the mix of C4’s and C5’s that must be removed to achieve lower RVP’s. Generally C4’s would be removed first, but eventually, C5’s must also be removed. The Chevron RVP-blending index¹⁵ was used to estimate the volumes of C4’s and C5’s that need to be removed in order to achieve lower-RVP base gasolines. The calculations were compared against other empirical vapor pressures for use in blending calculations, and the results were similar.

Potential Supply Impacts of Removal of 1-Pound RVP Waiver - Tables
Notes and Sources