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CFR

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.

Code of Federal Regulations

[68 FR 12271, Mar. 13, 2003]
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.

Code of Federal Regulations

[68 FR 12271, Mar. 13, 2003]
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