40 CFR § 401.13 - Test procedures for measurement.

---
identifier: "/us/cfr/t40/s401.13"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 401.13 - Test procedures for measurement."
title_number: 40
title_name: "Protection of Environment"
section_number: "401.13"
section_name: "Test procedures for measurement."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "401"
part_name: "GENERAL PROVISIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1251"
regulatory_source: "39 FR 4532, Feb. 1, 1974, unless otherwise noted."
cfr_part: "401"
---


# 401.13 Test procedures for measurement.

The test procedures for measurement which are prescribed at part 136 of this chapter shall apply to expressions of pollutant amounts, characteristics or properties in effluent limitations guidelines and standards of performance and pretreatment standards as set forth at parts 402 through 699 of this subchapter, unless otherwise specifically noted or defined in said parts.