Unique Columns values into array

I'm loading in a table with data from a CSV (6 columns of data)
Column 1 and Column 2 are "Div" and "Dept" respectively.

What I'm trying to do (in some sort of table.response method) is parse through the loaded data and generated 2 arrays.

parsedDiv array holds the UNIQUE values found in Column 1 (Div)
parsedDept array holds the UNQIUE values found in Column 2 (Dept)

I'm not having much luck. I looked through the forum and didn't see any examples. Was wondering if someone could help with the code (it can't be difficult, I just can't seem to get it right). Or, is there an AW method to do this???

Please help