City water management is analyzing water samples from the local river for water pollutants that could be toxic to humans if foun
d in drinking water. Their collection data is below. Samples Location Nitrates Carbamates 1 Two miles downriver from drinking water uptake facility 12 mg/L 0.06 mg/L 2 One mile downriver from drinking water uptake facility 9 mg/L 2 mg/L 3 One mile upriver from drinking water uptake facility 8 mg/L 0.04 mg/L 4 Two miles upriver from drinking water uptake facility 10 mg/L 0.05 mg/L Toxic levels: Nitrates ≥ 10 mg/L; Carbamates ≥ 0.04 mg/L. *≥ denotes greater than or equal to. Which sample location(s) could possibly lead to contamination of drinking water?
Samples 1, 2, 4
Samples 1 and 4
Samples 3 and 4
Only sample 4
Samples 1, 2, 4
Samples 1 and 4
Samples 3 and 4
Only sample 4
1 answer:
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