40 CFR § 422.40 - Applicability; description of the defluorinated phosphate rock subcategory.

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§ 422.40 Applicability; description of the defluorinated phosphate rock subcategory.

The provisions of this subpart are applicable to discharges resulting from the defluorination of phosphate rock by application of high temperature treatment along with wet process phosphoric acid, silica and other reagents.