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assess how the discharge of the town's wastewater into a nearby river will impact DO levels downstream A) The council would like to know whether DO levels will drop below the state standard of 5.0 mg/L at a park the river flows through that is approximately 5.79 km downstream. B) The council also wants to know whether the river's DO levels will ever drop below the state standard of 5.0 mg/L regardless of how far downstream. C) From an engineering standpoint, what could be done to improve the situation and make sure that DO levels remain above the state standard? The following data has been provided to you from the county's environmental compliance managers: Parameter Flow (m³/s) Ultimate BOD (mg/L) Wastewater 0.280 6.44 River 0.877 7.00

assess how the discharge of the town's wastewater into a nearby river will impact DO levels downstream A) The council would like to know whether DO levels will drop below the state standard of 5.0 mg/L at a park the river flows through that is approximately 5.79 km downstream. B) The council also wants to know whether the river's DO levels will ever drop below the state standard of 5.0 mg/L regardless of how far downstream. C) From an engineering standpoint, what could be done to improve the situation and make sure that DO levels remain above the state standard? The following data has been provided to you from the county's environmental compliance managers: Parameter Flow (m³/s) Ultimate BOD (mg/L) Wastewater 0.280 6.44 River 0.877 7.00

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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The town council you serve as an engineering consultant for has asked you to assess how the discharge of the town's wastewater into a nearby river will impact DO levels downstream A) The council would like to know whether DO levels will drop below the state standard of 5.0 mg/L at a park the river flows through that is approximately 5.79 km downstream. B) The council also wants to know whether the river's DO levels will ever drop below the state standard of 5.0 mg/L regardless of how far downstream. C) From an engineering standpoint, what could be done to improve the situation and make sure that DO levels remain above the state standard? The following data has been provided to you from the county's environmental compliance managers: Parameter Flow (m³/s) Ultimate BOD (mg/L) DO (mg/L) ka (at 28°C) (1/day) kr (at 28°C) (1/day) Speed (m/s) Temperature (°C) Wastewater 0.280 6.44 1.00 N/A N/A N/A 28 River 0.877 7.00 6.00 0.199 0.370 0.650 28
Transcribed Image Text:The town council you serve as an engineering consultant for has asked you to assess how the discharge of the town's wastewater into a nearby river will impact DO levels downstream A) The council would like to know whether DO levels will drop below the state standard of 5.0 mg/L at a park the river flows through that is approximately 5.79 km downstream. B) The council also wants to know whether the river's DO levels will ever drop below the state standard of 5.0 mg/L regardless of how far downstream. C) From an engineering standpoint, what could be done to improve the situation and make sure that DO levels remain above the state standard? The following data has been provided to you from the county's environmental compliance managers: Parameter Flow (m³/s) Ultimate BOD (mg/L) DO (mg/L) ka (at 28°C) (1/day) kr (at 28°C) (1/day) Speed (m/s) Temperature (°C) Wastewater 0.280 6.44 1.00 N/A N/A N/A 28 River 0.877 7.00 6.00 0.199 0.370 0.650 28
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