Part A You have been asked to evaluate two different wells for safety. Well A and Well B have the same owner but are in different locations. Examine the results in the table for each of the wells.
Well A Well B
Contaminant Amount (mg/L) Contaminant Amount (mg/L)
arsenic 0.040 arsenic 0.06
cadmium 0.007 barium 3.0
cyanide 0.31 cadmium 0.001
nitrate 12 lead 0.000
thallium 0.000 nitrate 0.00

Refer to the data table and determine which contaminants are found in toxic quantities in Wells A and B.