(a) Number. A tank vessel must have the following number of slop tanks that comply with the requirements of this section:
(1) A new vessel of less than 70,000 tons DWT and an existing vessel must have at least one slop tank.
(2) A new vessel of 70,000 tons DWT or more must have at least two slop tanks.
(b) Capacity. Slop tanks must have the total capacity to retain oily mixtures from cargo tank washings, oil residue, and ballast water containing an oily mixture of 3 percent or more of the oil carrying capacity. Two percent capacity is allowed if there are—
(1) Segregated ballast tanks that meet the requirements in § 157.09, § 157.10, § 157.10a, or § 157.10b; or
(2) No eductors arrangements that use water in addition to the washing water.
(c) Design. A slop tank required in this section:
(1) Must minimize turbulence, entrainment of oil, and the creation of an emulsion by the use of separate inlet and outlet connections; and
(2) May carry bulk oil when not being used as a slop tank.
[CGD 74-32, 40 FR 48283, Oct. 14, 1975]
Editorial Note:For Federal Register citations affecting § 157.15, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.
authority: 33 U.S.C. 1903;
46 U.S.C. 3703,
3703a; Department of Homeland Security Delegation No. 0170.1. Subparts G, H, and I are also issued under section 4115(b), Pub. L. 101-380, 104 Stat. 520; Pub. L. 104-55, 109 Stat. 546
source: CGD 74-32, 40 FR 48283, Oct. 14, 1975, unless otherwise noted.
cite as: 33 CFR 157.15