---
kind: "section"
citation: "40 C.F.R. § 414.90"
title: "40"
number: "414.90"
heading: "Applicability; description of the subcategory of direct discharge point sources that use end-of-pipe biological treatment."
url: "https://uscodex.org/cfr/40/414.90"
---

# §414.90. Applicability; description of the subcategory of direct discharge point sources that use end-of-pipe biological treatment.


The provisions of this subpart are applicable to the process wastewater discharges resulting from the manufacture of the OCPSF products and product groups defined by [§ 414.11](/cfr/40/414.11.md) from any point source that uses end-of-pipe biological treatment or installs end-of-pipe biological treatment to comply with BPT effluent limitations.


## Notes

### Authority

Authority: Secs. 301, 304, 306, 307, and 501, Pub. L. 92-500, 86 Stat. 816, Pub. L. 95-217, 91 Stat. 156, Pub. L. 100-4, 101 Stat. 7 (33 U.S.C. 1311, 1314, 1316, 1317, and 1361).

### Source

Source: 52 FR 42568, Nov. 5, 1987, unless otherwise noted.