Good Evening,
From the wording of your report, I was under the assumption you were looking at how to enter the PD via the door, and not necessarily get to the vault, I should have clarified that with you, and that's a mistake on my end.
As shown below, there is an alternate entrance to enter pd, and the base is not propblocked. I showed you the primary entrance, that allows access to the vault via the middle cell door. I omitted the sewer entrance as that is commonly propblocked, but in this case is not, and would allow for easier access to the vault. I make an effort to not expose sensitive portions of bases when dealing with failbase tickets (entrance routes, peeks, etc) to keep raids fair.
Additionally, that blast door was removed after I told him the sewers entrance was technically a failbase due to the need to jump/crouch. I don't have a clip of him removing the prop (out of my clipping length), but I did see him remove it when I was speaking to him.
This is the sewers entrance that was not blocked, but technically fail due to the jump/crouch portion. https://medal.tv/games/garrys-mod/clips/mAKTnuPTjeE-rFWIc?invite=cr-MSx6clUsMjcxMjkzMTg&v=14
Thanks for taking the time to make a staff report, I hope my clip showing the alternate entrance helps.