It should not be any concern regarding safety as I see it, the code allows the medical gas system pipe to be in the same trench, why should it not be allowed to be installed in an structure designed for it and other systems?
5.1.10.11.3.3 Medical gas piping shall be permitted to be installed in the same service trench or tunnel with fuel gas lines, fuel oil lines, electrical lines, steam lines, and similar utilities, provided that the space is ventilated (naturally or mechanically) and the ambient temperature around the medical gas piping is limited to 54°C (130°F) maximum.
5.1.10.11.4.1 Piping shall be supported from the building structure.