Conduit question.

>>1112248
schedule 80 PVC conduit.

>>1112248
Galvanized or PVC are probably the best choice. Also send him my condolences cause "water treatment plant" is usually code for "hundred thousand gallons of human shit plant"

>>1112248
Pvc coated rmc

I don't see either of those gasses in concentrations that are not lethal to a worker doing much against the plastic insulation of the wires.

Threaded rigid conduit is typically used in explosive environments which was mentioned above. If the plant has anaerobic digesters there's going to be a possibility of igniting methane created in the process, which depending on concentration can be exceptionally dangerous. Wet wells, dry wells, pretty much anywhere wastewater is allowed go anearobic requires proper installation and fittings.
Fittings that connect to your conduit should have a stamp indicating a rating for hazardous locations (Class 1 Division 1 or 2). they have a range of rated conduit fittings for hazardous locations such as: LB, C, T.
Lengths of Flexible conduits are also available in various lengths. Flexible Conduits have an outer brass braid ( spark resistance material) and have a Hazardous location rating on them.

Be careful.

>>1113315
Seconded. Worked at a lot of shit plants. PVC coated RMC.