The BatchGroup.ResultsTable.Columns.Item(#).ColumnType is pibvColumnAlias.
The BatchGroup.ResultsTable.Columns.Item(#).Source is "AliasName" which gives you the name of the alias.
The underlying tag for an alias can be different on different servers. To find the server and tag name you would have to look in each row of the results, you would need the row number and the alias number or you would have to check each item on the list:
Dim myColAlias As pibvResultsColumnConstants
Dim myColSource As String
Dim myColPathname As String
myColAlias = BatchGroup1.ResultsTable.Columns.Item(10).ColumnType
myColSource = BatchGroup1.ResultsTable.Columns.Item(10).Source
myColPathname = BatchGroup1.ResultsTable.ResultItems.Item(1).BatchItem.PIUnit.PIAliases.Item(1).DataSource.PathName
myColPathname = BatchGroup1.ResultsTable.ResultItems.Item(i).BatchItem.PIUnit.PIAliases.Item("AliasName").DataSource was exactly what I needed. Thanks for pointing me in the right direction