40 CFR 417.181

§ 417.181 Specialized definitions.

United States · 40 CFR — Protection of Environment · Status: effective

Cite this

Citation: 40 CFR 417.181, § 417.181 Specialized definitions, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/188632
Permanent ID: ys:prov:188632@1
SHA-256: 2575c558ae283b0b2dc99ec5a276886867049365271e74a37e5db178139e2b00

The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.

Full text

For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. (b) The term anhydrous product shall mean the theoretical product that would result if all water were removed from the actual product. (c) The term surfactant shall mean those methylene blue active substances amenable to measurement by the method described in “Methods for Chemical Analysis of Water and Wastes,” 1971, Environmental Protection Agency, Analytical Quality Control Laboratory, page 131. (d) The term BOD7 shall mean the biochemical oxygen demand as determined by incubation at 20 degrees C for a period of 7 days using an acclimated seed. Agitation employing a magnetic stirrer set at 200 to 500 r.p.m. may be used.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.