Subpart W—Primary Precious Metals and Mercury Subcategory
- §421.250 Applicability: Description of the primary precious metals and mercury subcategory.
- §421.251 Specialized definitions.
- §421.252 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
- §421.253 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
- §421.254 Standards of performance for new sources.
- §421.255 [Reserved]
- §421.256 Pretreatment standards for new sources.
- §421.257 [Reserved]