| REFINERS/ASPHALT MERCHANDISERS |
| CALUMET SPECIALTY PRODUCTS |
Shreveport, LA 71109 |
318-632-4076 |
| GARY-WILLIAMS ENERGY |
Oklahoma City, OK 73108 |
405-945-0024 |
| LION OIL COMPANY |
Muskogee, OK 74403 |
405-747-0257 |
| NUSTAR ENERGY |
San Antonio, TX 78278 |
817-613-0947 |
| VALERO MARKETING & SUPPLY |
Oklahoma City, OK 73137 |
405-722-1190 |