46 C.F.R. § 153.1126 Discharge of NLS residue from a slop tank to the sea: Categories A, B, C, and D.
Title 46 - Shipping
NLS residue in a slop tank may not be discharged into the sea unless— (a) The ship meets the conditions for discharging the NLS residue from a cargo tank in §153.1128; and (b) For Category B NLS residue transferred to the slop tank under §153.1119(b), the NLS is discharged— (1) Through an NLS residue discharge system with the flow recording equipment required in §153.481(b)(2) operating; and (2) At a rate maintained at or below Q in the following: For tank contents that are miscible For tank contents that are immiscible Q=KU1.4 L1.6 ×10−5 m3 /hr
where: Q=maximum permissible slops discharge rate in cubic meters per hour. V=volume of slops in the tank in cubic meters. K=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)). U=ship's speed in knots. L=ship's length in meters. N=number of tanks containing Category B NLS residue pumped into the slop tank.
Title 46: Shipping
PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS
Subpart C—Operations
Approval of Surveyors and Handling of Categories A, B, C, and D Cargo and NLS Residue
§ 153.1126 Discharge of NLS residue from a slop tank to the sea: Categories A, B, C, and D.
