is divided into two steps: Step 1 considers TOC removal as a percentage of the influent TOC to demonstrate compliance based on the TOC and alkalinity of the source water. If the alkalinity is high, the pH has to be lowered to the level at which the TOC removal is optimal. In Step 1, it is expected that enhanced softening be achieved; USEPA has not therefore developed Step 2 procedures for systems using enhanced softening.