4. In a seawater desalination plant, a process engineer in charge of operating 50 units of triple effect backward feed evaporators was facing difficulties with the froth management. He collected the samples of froths and sent those to the lab for environmental hazard analysis. After assessing the components of the samples, it was ensured from the lab that the froths were environmentally benign. The operating engineer then decided to discharge the froths to the sea biweekly. The operational cost for the discharge was less than 10,000 SAR per month. The amount of froth discharged every month was around 5000 kg. At the end of a financial year, the higher management issued a show-cause sa additional expense of more than 100,000 SAR. What might be the reason(s) for the loss? As a process engineer, how would you address the issue? [2 (504:2)]