First I'd like to say this: Great map!
Everyone pretty much addressed most of the issues with your map so far, but I just have a couple atmosphere suggestions:
1. Try putting the security guard and whatnot at the beginning, because it feels as if you're walking into a secure area of BMRF after you've gotten off the tram. Or at least have the player start from the other end of the map.
2. To me, the storage room seemed a little out of place, especially with that red lighting. Change the red to white and the floor to something less metallic.
3. Add the ability for the player to enter one or two of the offices at the beginning of the map, maybe making the scientist inside say something along the lines of "Go away, Freeman! Can't you see I'm working?"
4. Also, the section seemed far too short, unless the door behind the player in the beginning chamber leads to more of Section B-105.
But hey, it's your map. Do whatever you want. Just fix those texture errors and the blurry textures. One more thing, though, when the player gets close to one of the walls with a lot of decor on it, they can hear computer sounds. These seem out of place unless you have a large computer terminal there.