Rham Company currently discharges liquid waste into Richmond's municipal sewer system. However, the Richmond municipal government has informed Rham that a surcharge of $6 per thousand cublic liter will soon be imposed for the discharge of this waste. This has prompted management to evaluate the desirabilitv of treating its own liauid waste. A proposed system consists of three clements. The first is a retention basin, which would permit unusual discharges to be held and treated before entering the downstream system. The second is a continuous self-cleaning rotary filter required where solids are removed. The third is an automated neutralization process requited where materials are added to control tha alkalinitu-naldit........ The system is ded gned to process 700,000 liters a day. However, management anticipates that only about 350,000 liters of liquid waste would be procesued in a normal workday. The company operates 300 days per year. The initial investment in the system would be $1,500,000, and annual operating colts are predicted to be $280,000. The system has a predicted useful life of 10 years and a salvago value of $100,000