TANK CLEANING TO CLEAN PETROLEUM PRODUCTS (CPP) STANDARDS WALL WASH TEST IS NOT REQUIRED In case last cargo is Lube Light Not Heated Oils - Total Duration 24hrs Tank Cleaning Methods Unitor guidelines - hours Hot Sea Water - hours Hot Sea Water Injecting Sea Clean (2/1000) hour Hot Fresh Water steaming if necessary Proposed Method Please divide cargo and slop tanks in four (5) groups Each of the first four groups shall consist of three (3) cargo tanks and the last fifth group shall consist of slop P & S tanks All groups shall be cleaned in three (3) stages as following: 1st stage - tanks at a time By FIXED machines full-wash cycle Sea water Hot 75 - 80 C (preferred Fresh Water if sufficient quantity is available) Back Pressure above bar Duration: groups X 60 minutes (includes change of tanks and stripping) 2nd stage - tanks at a time By FIXED machines full-wash cycle Fresh water Hot 75 - 80 C Back Pressure above bar Duration: groups X 60 minutes (includes change of tanks and stripping) 3rd stage Ventilation2, hand washing, drying, mopping & flushing by hot fresh water if needed Duration: 14 tanks X 60 minutes full cycle of a fixed machine last 40 minutes and use less than four (10) m3 water at bar During ventilation please adjust the pressure by opening more tanks in order to protect the fan