I ended up using the script task for this:

Public Sub Main()

Dim DateModified As Date = DateTime.Now.AddMinutes(-15)

Dim SourceFile As String = Dts.Variables("SourceFile").Value.ToString()

If File.GetLastWriteTime(SourceFile) <= DateModified Then

...

Hi kbatta,

Thank you very much for the response. here are my results:

On the Collection tab of the Foreach Loop Editor and on the right side, not the left, expand Expressions...