46 CFR § 162.050-39
Measurement of oil content
April 15, 2021
The collection and testing of all samples of oil in water from the required test will be accomplished in accordance with ISO 9377-2 (2000), Water Quality—Determination of hydrocarbon oil index-Part 2: Method Using solvent extraction and Gas Chromatography (incorporated by reference, see §162.050-4).
[USCG-2004-18939, 74 FR 3393, Jan. 16, 2009]