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 Sec. 153.1128; and
(b) For Category B NLS residue transferred to the slop tank under Sec. 153.1119(b), the NLS is discharged--
(1) Through an NLS residue discharge system with the flow recording equipment required in Sec. 153.481(b)(2) operating; and
(2) At a rate maintained at or below Q in the following:
For tank contents that are miscible
[GRAPHIC(S) NOT AVAILABLE IN TIFF FORMAT]
For tank contents that are immiscible Q = KU\1.4\ L\1.6\ x 10-5 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
Sec. Sec. 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.