(a) A local food processing plant discharges its wastewater to the sewerage system. A sample of this discharge was taken, and the ultimate BOD(B0)u) of the waste was reported by the laboratory to be 5,000mg/L at 20C. As the engineer in charge of the treatment plant, you want to know the BOD5 value of this wastewater, in addition to this value of the BODu. If k1 for the wastewater is 0.45/ day (at 20C ), what is the BOD5 of the wastewater at 20C ? (b) Your sewer use ordinance (SUO) requires that industrial dischargers pay a fee of $1.50 per kg of BOD5 in excess of that of domestic wastewater (which typically has a BOD mg/L. Surcharges of this type are considered fair because most WWTPs are not designed to accommodate large food processors with high-strength waste. If the flow rate of this food waste discharge is 100m3/ day, what will be the monthly fee