WALL WASH STANDARDS

TANK CLEANING TO METHANOL STANDARDS WALL WASH TEST REQUIREMENTS In case last cargo is Methanol, wall wash test not to be required In case any cargo or slop tank(s) used for ballast purposes, and/or any cargo or slop tank is not in Methanol atmosphere (last cargo was not loaded with Methanol), wall wash test is required If the last cargo is not methanol, wall wash test is required and vessel must arrive ready to load methanol with the cargo tanks clean to the satisfaction of the independent surveyor and pass the wall wash test with the following results: Tank wall area of about 0.25 M2 on each tank bulkhead shall be washed with Methanol Methanol volume of about liter/tank may be used for washing Acceptable Result Test Method: Chloride content: NIL (2 ppm maximum TURBIDITY test is acceptable) Permanganate time: 60 minutes minimum ASTM-D-1363 Hydrocarbons: NIL ASTM-D-1152 Color pt co.- 15 maximum ASTM-D-1209 Appearance: Clear, free from suspended matter Odor: Characteristic, free of foreign odor MTBE: 10 ppm maximum Gas chromatography Ethanol: 10 ppm maximum First foot sample test: The 1st foot sample test should satisfy the under mentioned requirements, in order to ensure the cleanliness of cargo tanks and pipe lines: Limit Test Method: Chlorine content: NIL (2 ppm maximum TURBIDITY test is acceptable) Permanganate time: 60 minutes minimum ASTM-D-1363 Hhydrocarbons: NIL ASTM-D-1152 Water: 0.1 % maximum Karl Fisher Appearance: Clear, free from suspended matter Odor: Characteristic, free of foreign odor