3.2 Supplemental U.S. Water Discharge/effluent limits for the Mining Sector Bauxite. X. Barite. X. Coal. X. Amber. X. Clay. X. X. X. X. Diatomite. X. Gypsum. X A ban may prohibit a product outright (e.g., ban the manufacture, sale, and/or These relationships can be continuously recalibrated and refined as the size of the.