StacksVerified U.S. regulatory reference

40 CFR §261.199

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Incompatible materials must not be placed in the same tank system.
  2. (b)Hazardous secondary material must not be placed in a tank system that has not been decontaminated and that previously held an incompatible material.