§ 422.10 40 CFR Ch. I (7–1–15 Edition)

Subpart A—Phosphorus Subpart D—Defluorinated Production Subcategory Phosphate Rock Subcategory

§ 422.10 Applicability; description of SOURCE: 41 FR 25975, June 23, 1976, unless the phosphorus production sub- otherwise noted. category. The provisions of this subpart are ap- § 422.40 Applicability; description of plicable to discharges of pollutants re- the defluorinated phosphate rock sulting from the production of phos- subcategory. phorus and ferrophosphorus by smelt- The provisions of this subpart are ap- ing of phosphate ore. plicable to discharges resulting from the defluorination of phosphate rock Subpart B—Phosphorus by application of high temperature treatment along with wet process phos- Consuming Subcategory phoric acid, silica and other reagents. § 422.20 Applicability; description of the phosphorus consuming sub- § 422.41 Specialized definitions. category. For the purpose of this subpart: The provisions of this subpart are ap- (a) Except as provided below, the gen- plicable to discharges of pollutants re- eral definitions, abbreviations, and sulting from the manufacture of phos- methods of analysis set forth in 40 CFR phoric acid, phosphorus pentoxide, part 401 shall apply to this subpart. (b) The term phosphorus pentasulfide, phosphorus process waste water means any water which, during manu- trichloride, and phosphorus facturing or processing, comes into di- oxychloride directly from elemental rect contact with or results from the phosphorus. The production of phos- production or use of any raw material, phorus trichloride and phosphorus intermediate product, finished product, oxychloride creates waste water pollut- by-product, or waste product. The term ants not completely amenable to the ‘‘process waste water’’ does not include procedures utilized for best practicable contaminated nonprocess waste water, control technology currently available. as defined below. The standards set for phosphorus tri- (c) The term contaminated non-process chloride manufacture and phosphorus waste water shall mean any water in- oxychloride manufacture, accordingly, cluding precipitation runoff, which must differ from the rest of the sub- during manufacturing or processing, category at this level of treatment. comes into incidental contact with any raw material, intermediate product, Subpart C—Phosphate finished product, by-product or waste Subcategory product by means of: (1) Precipitation runoff, (2) accidental spills, (3) acci- § 422.30 Applicability; description of dental leaks caused by the failure of the phosphate subcategory. process equipment and which are re- The provisions of this subpart are ap- paired or the discharge of pollutants plicable to discharges of pollutants re- therefrom contained or terminated sulting from the manufacture of so- within the shortest reasonable time dium tripolyphosphate, animal feed which shall not exceed 24 hours after grade, calcium phosphate and human discovery or when discovery should food grade calcium phosphate from reasonably have been made, whichever phosphoric acid. The production of is earliest, and (4) discharges from safe- human food grade calcium phosphate ty showers and related personal safety creates waste water pollutants not equipment, and from equipment completely amenable to the procedures washings for the purpose of safe entry, utilized for best practicable control inspection and maintenance; Provided, technology currently available. The That all reasonable measures have standards set for human food grade cal- been taken to prevent, reduce, elimi- cium phosphates accordingly must dif- nate and control to the maximum ex- fer from the rest of the subcategory at tent feasible such contact and provided this level of treatment. further that all reasonable measures

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