The discharge from the renenutet sugar beet plant causes the do at the critical point to fall to 4.0 mg · l−1. the meskhenet stream has a negligible bod and the initial deficit after the river and wastewater have mixed is zero. what do will result if the concentration of the waste (lw) is reduced by 50%? assume that the flows remain the same and that the saturation value of do is 10.83 mg · l−1 in both cases.