40 CFR 425.15 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 425.01 To Parts 611-699) — Environmental Protection Agency (Continued) (§ 425.01 To Parts 611-699) — Effluent Guidelines And Standards (Continued) (§ 425.01 To § 471.106) — Leather Tanning And Finishing Point Source Category (§ 425.01 To Appendix C To Part 425) — Hair Pulp, Chrome Tan, Retan-Wet Finish Subcategory (§ 425.10 To § 425.16) — Pretreatment standards for existing sources (PSES).

4 Aug 2016

(a) Except as provided in § 425.04 and 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403, and achieve the following pretreatment standards:

Pollutant or pollutant property	PSES
Maximum for any 1 day	Maximum for monthly average
	Milligrams per liter (mg/l)
Sulfide	24
Total chromium	12	8
pH	( ¹)	( ¹)

¹ Not less than 7.0.

(b) Any existing source subject to this subpart which processes less than 275 hides/day shall comply with § 425.15(a), except that the total chromium limitations contained in § 425.15(a) do not apply.

40 CFR 425.15

[47 FR 52870, Nov. 23, 1982; 48 FR 30116, June 30, 1983, as amended at 53 FR 9182, Mar. 21, 1988; 61 FR 35685, July 8, 1996]