46 CFR § 98.30-29
Piping incompatible products
April 15, 2021
No person may pipe a portable tank or IBC with another tank that contains a chemically incompatible product.
[CGD 73-172, 39 FR 22954, June 25, 1974, as amended by USCG-2011-0088, 78 FR 54787, Sept. 6, 2013]