{"data":{"id":"us/46-cfr-153.1126","jurisdiction":"us","citation":"46 CFR 153.1126","heading":"Discharge of NLS residue from a slop tank to the sea: Categories A, B, C, and D.","body":"NLS residue in a slop tank may not be discharged into the sea unless—\n(a) The ship meets the conditions for discharging the NLS residue from a cargo tank in § 153.1128; and\n(b) For Category B NLS residue transferred to the slop tank under § 153.1119(b), the NLS is discharged—\n(1) Through an NLS residue discharge system with the flow recording equipment required in § 153.481(b)(2) operating; and\n(2) At a rate maintained at or below Q in the following:\nFor tank contents that are miscible\nFor tank contents that are immiscible\nQ = KU 1.4 L 1.6 × 10−5 m 3/hr\nwhere:\nQ = maximum permissible slops discharge rate in cubic meters per hour.\nV = volume of slops in the tank in cubic meters.\nK = 4.3, except K = 6.45 if Q is distributed between two NLS residue discharge outlets on opposite sides of the ship (see §§ 153.470(c) and 153.481(b)).\nU = ship's speed in knots.\nL = ship's length in meters.\nN = number of tanks containing Category B NLS residue pumped into the slop tank.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES","PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS","Subpart C—Operations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"164f2510d8c23670ebf8d8c45726fc7edad6cb543102f17325a4116df127c582","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-153.1124","next":"us/46-cfr-153.1128"},"notice":"GroundRules: Original legal text. Not legal advice."}