Losses in the coal supply chain - United States Energy AssociationDec 7, 2012 . transportation costs, as rail and conveyor or truck loads will carry more useful product and less waste. The cost of washing and preparation will therefore need to be balanced carefully with the needs of the customer and the economics of carrying out the extra task in the coal chain. Losses may be due to the.washed coal is less in volume,Washed Coal - pulseThe maintenance folk preferred coal that had low abrasion properties. The environmental people liked low sulfur and low ash levels. Then, the ash sales department wanted high ash to dilute the carbon and increase the sales volume. The fuel purchasing group liked low cost coals. Near the end of the discussion I asked if.