both heavy and regular (batteries, tune-ups, and repainting) maintenance of the trains of line 10, as with all other trains on the rail network, takes place at the depot at "choisy". opened in 1931, it is situated in the 8th arrondissement of paris, close to the boulevard périphérique and accessible via a junction on line 7. it is composed of two distinct sections: a maintenance workshop for the trains of line 7 (amt), and a workshop for changing the composition of the trains on the network. the depot occupies a total of . 330 agents were employed at this depot in 2007.