Two regimes counting the same drum
RCRA asks what a waste is and where it may go. The national emission standard for benzene waste operations asks something different: how much benzene the site's aqueous waste streams contain in a year, and therefore what controls those streams need before they ever reach a disposal decision. A stream can be entirely ordinary under RCRA and still be counted, controlled and reported under the benzene standard, and the site's total annual benzene quantity determines which control option applies to the plant as a whole. The practical consequence is that waste minimization on one stream can change the compliance obligation on another, and that the people who manage the manifest and the people who manage the air permit need to be looking at the same inventory. On most sites they are not.