I work as a contract pressure vessel, piping, and storage tank inspector at refineries, chemical plants, natural gas plants, or just about anywhere else there's a need throughout the US or world.

Generally, the only time a building is required to get a Certificate Of Occupancy is when a new building is constructed, when an existing building is converted from commercial to residential and maybe after an existing residential building has been deemed to be unsafe by a government agency after the building is destroyed by an earthquake, fire, flood, chemical spill, or sewer waste spill.

Pharmeceutical, Medical, Manufacturing, Chemical, Research, Distribution.Let me know if you would like to have a conversation about Indianapolis.

Tenant agrees not to use caustic draincleaning chemicals in any of the drains or plumbing fixtures. 

@Raul Nico Ruiz   I used Shawn Huss at Chemical Bank.

So, our tenant killed one on her pillow and yes, it was a bedbug.Then, they sprayed her unit with a chemical and it took care of the problem, because she called us right away.  

Certain cleaning chemicals should not go down the drain and I let them know they should be looking for chemicals marked septic safe.

Resident shall only use a plunger to attempt to fix a slow or stopped drain, and shall not pour chemical or other drain cleaners into any stopped or slow drains.

Chemical Bank is one I've used. 

There is also a stable blue collar work force with the refineries, chemical plants, and a port.