1. Sort and wash split peas; drain.
2. Remove roots, outer leaves, and tops from leeks, leaving 1/2 inch of dark leaves. Slice leek in half lengthwise; cut each half crosswise into thin slices. Rinse thoroughly with cold water.
3. Cook bacon in a large heavy saucepan over medium-high heat until pieces begin to crisp. Add onion, celery, carrot, oil, and leek; reduce heat to medium, and cook 10 minutes, stirring occasionally. Add split peas, and cook 1 minute, stirring constantly. Add 7 cups water and next 6 ingredients (through bay leaf); bring to a boil over medium-high heat. Partially cover, reduce heat to medium-low, and simmer 45 minutes or until split peas are tender.
4. Discard bay leaf. Stir in ham and smoked paprika; simmer 2 minutes or until ham is thoroughly heated.