Before loading these cargoes it is essential that the tank is dry and free from moisture.
After carriage of these cargoes, tanks should not be brought into contact with water. No steam, ballast water, or aqueous cargoes must come into contact with the coating before it is restored to its original condition. This may be obtained by ventilating the tank thoroughly with dry air (relative humidity lower than 80%) until the tank is in a steady state gas-free condition (guideline 1% the of LEL - see Ventilation
). After ventilation, non-aggressive (without notes 4, 7, 8 and/or 11) and non aqueous cargoes (maximum water content 1%) should be carried for a period of at least 10 days - an empty tank (dry air) is also acceptable.
Methanol or Ethanol cargoes must be pure (contamination with acetaldehyde, formaldehyde, formic acid, acetone and acetic acid should be below 100 ppm per contaminant).
The pH of Ethanol should be between 4 and 7. Methanol should be "water free" (maximum permissible water 0,10 % or 1000 ppm). Samples of the Methanol or Ethanol must be taken prior to both loading and discharge. The samples have to be sealed, properly marked and dated and retained on board for a minimum of 6 months after discharge of the Methanol or Ethanol cargo.