MNR Signal Trainee

All the employment process threads on here have been a great help. I passed my physical ability test and was offered a conditional predicated on the UA results. I was told by HR that I will recieve an email with some forms I need to complete for the 2nd Background Check. It has been a week and I am still waiting for that email. My question is how long does that usually take? I will keep reading to see if I find the answer in previous posts.