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

153.1126 - Discharge of NLS residue from a slop tank to the sea: Categories A, B, C, and D.

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 (image) For tank contents that are immiscible Q=KU1.4 L1.6105 m 3 /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.