Site Feedback

Title 40

Displaying title 40, up to date as of 7/17/2026. Title 40 was last amended 7/16/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Subpart AA—Borax Production Subcategory

§ 415.270 Applicability; description of the borax production subcategory.

The provisions of this subpart are applicable to discharges resulting from the production of borax by the ore-mining process and by the Trona process.

§ 415.271 Specialized definitions. [Reserved]

§ 415.272 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): There shall be no discharge of process wastewater pollutants to navigable waters, except that residual brine and depleted liquor may be returned to the body of water from which the process brine solution was originally withdrawn.

§§ 415.273-415.275 [Reserved]

§ 415.276 Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources (PSNS): The limitations are the same as specified in § 415.272.

[49 FR 33421, Aug. 22, 1984]