The wastewater treatment plant forpine city discharges 1 × 105 m3/day of treated waste to thepine river. immediately upstream of the treatment plant, the pineriver has an ultimate cbod of 2 mg/l and a flow of 9 × 105m3/day. at a distance of 20 km downstream of the treatment plant, the pine river has an ultimate cbod of 10 mg/l. the state’sdepartment of environmental quality (deq) has set an ultimate cboddischarge limit for the treatment plant of 2,000 kg/day. the riverhas a velocity of 20 km/day. the cbod decay coefficient is 0.1/day. is the plant in violation of the deq discharge limit?