1. Regulations
  2. title 40
  3. chapter I-i31
  4. part 439
  5. subjgrp 4
  6. § 439.4

View all text of Subjgrp 4 [§ 439.0 - § 439.4]

§ 439.4 - General limitation or standard for pH.

The pH must remain within the range 6.0 to 9.0 in any discharge subject to BPT, BCT or NSPS limitations or standards in this part.

[68 FR 12271, Mar. 13, 2003]

AUTHORITY: 33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342 and 1361.

SOURCE: 48 FR 49821, Oct. 27, 1983, unless otherwise noted.

CITE AS: 40 CFR 439.4