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The ABC Tannery has asked you to assist them in preparations to file for a NPDES permit to discharge wastewater into the XYZ River. The Dept. of Natural Resources water quality criterion for the XYZ River is 5.00 mg/L of DO. They have asked you the following questions: What is the critical DO and where (at what distance) downstream does it occur? They have provided you with the following data. The flow data pertain to the 7-year, 10-day low flow at the tannery.
Parameter
ABC wastewater
XYZ River
Flow, m3/s
1.148
8.222
BOD5 at 20oC, mg/L
90.00
N/A
BODult at 20oC, mg/L
7.66
DO, mg/L
1.00
6.00
Temperature, oC
17.5
15.0
k at 20oC, d-1
0.3685
Speed, m/s
0.300
Depth, m
2.92
Bed-activity coefficient
0.100
Submit a copy of your spreadsheet solution with a graph showing your results on Moodle. No hard copy will be accepted. Make sure to useappropriate significant digits.
Watts in Cassette Players, A walker's cassette tape player uses 4 AA batteries in series to provide 6V to the player circuit. The four alkaline battery cells store a total of 200 watts-second of energy.
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