Server Rack for Utility Closet (water risk and dust)

I’m looking for a server rack that is water and dust resistant. It will be installed into an unpaintet utility closet that has water pipes present. It must accommodate a 30" deep server (Dell R740). Any recommendations?

Note: Yes I am aware this is not a great spot for servers. I’m offering other options, but management wants to know what it would take for this to work.

Cooling is going to be a problem
Also largest I saw was 8u high, which might be a problem depending on how much stuff you need to cram into it.

Strike that, interior is going to be a lot too short!