---
kind: "section"
citation: "33 C.F.R. § 159.123"
title: "33"
number: "159.123"
heading: "Coliform test: Type I devices."
url: "https://uscodex.org/cfr/33/159.123"
---

# §159.123. Coliform test: Type I devices.

- (a) The arithmetic mean of the fecal coliform bacteria in 38 of 40 samples of effluent discharged from a Type I device during the test described in [§ 159.121](/cfr/33/159.121.md) must be less than 1000 per 100 milliliters when tested in accordance with [40 CFR part 136](/cfr/40/part136.md).
- (b) The 40 samples must be taken from the device as follows: During each of the 10-test days, one sample must be taken at the beginning, middle, and end of an 8-consecutive hour period with one additional sample taken immediately following the peak capacity processing period.

## Notes

### Amendments

[CGD 73-83, 40 FR 4624, Jan. 30, 1975, as amended by CGD 75-213, 41 FR 15326, Apr. 12, 1976]

### Authority

Authority: 33 U.S.C. 1322(b)(1); 49 CFR 1.45(b). Subpart E also issued under authority of sec. 1(a)(4), Pub. L. 106-554, 114 Stat. 2763; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGD 73-83, 40 FR 4624, Jan. 30, 1975, unless otherwise noted.

### Amendments

[CGD 73-83, 40 FR 4624, Jan. 30, 1975, as amended by CGD 75-213, 41 FR 15326, Apr. 12, 1976]