Appendix A Modeling of Potential Discharges into Various Receiving Water Types. Various scenarios have been modeled to demonstrate the minimum level of treatment required to maintain DO criteria. Discharges of 0.1 million gallons per day (MGD), 1.0 MGD, and 5.0 MGD have been evaluated for impacts into four types of receiving waters. The receiving waters analyzed were intermittent streams (2.0 mg/l DO criterion), perennial streams with 0.1 cubic feet per second (cfs) headwater (5.0 mg/l DO criterion), tidal rivers (4.0 mg/l DO criterion), and open shallow bays (4.0 mg/l DO criterion). Standard default values for hydraulic coefficients, kinetics, and temperature were used in all models. The results are as follows: Discharge Treatment Levels Minimum Water Body (MGD) CBOD5/NH3-N/DO Dissolved (mg/l) Oxygen (mg/l) Intermittent Stream 0.1 30/3/4 4.3 (2.0 mg/l DO 1.0 30/3/4 2.3 criterion) 5.0 30/3/4 1.8 Perennial Stream 0.1 30/3/4 4.8 (5.0 mg/l DO 1.0 7/2/6 4.9 criterion) 5.0 5/2/6 4.8 Tidal River 0.1 30/3/4 4.5 (4.0 mg/l DO 1.0 30/3/4 4.5 criterion) 5.0 30/3/4 4.2 Open Bay 0.1 30/3/4 5.2 (2.0 mg/l DO 1.0 30/3/4 4.6 criterion) 5.0 10/3/4 4.2
Appendix A Modeling of Potential Discharges into Various Receiving Water Types. Various scenarios have been modeled to demonstrate the minimum level of treatment required to maintain DO criteria. Discharges of 0.1 million gallons per day (MGD), 1.0 MGD, and 5.0 MGD have been evaluated for impacts into four types of receiving waters. The receiving waters analyzed were intermittent streams (2.0 mg/l DO criterion), perennial streams with 0.1 cubic feet per second (cfs) headwater (5.0 mg/l DO criterion), tidal rivers (4.0 mg/l DO criterion), and open shallow bays (4.0 mg/l DO criterion). Standard default values for hydraulic coefficients, kinetics, and temperature were used in all models. The results are as follows: Water Body Discharge (MGD) Treatment Levels CBOD5/NH3-N/DO (mg/l) Minimum Dissolved Oxygen (mg/l) Intermittent Stream 0.1 30/3/4 4.3 (2.0 mg/l DO criterion) 1.0 30/3/4 2.3 5.0 30/3/4 1.8 Perennial Stream 0.1 30/3/4 4.8 (5.0 mg/l DO criterion) 1.0 7/2/6 4.9 5.0 5/2/6 4.8 Tidal River 0.1 30/3/4 4.5 (4.0 mg/l DO criterion) 1.0 30/3/4 4.5 5.0 30/3/4 4.2 Open Bay 0.1 30/3/4 5.2 (2.0 mg/l DO criterion) 1.0 30/3/4 4.6 5.0 10/3/4 4.2