The toilet block leaked into the pond beside the entrance road to BSJ. As I only had a tent the campsite bods put me on the narrow strip of grass between the road and the pond. The smell from the sewage going into the pond had people walking by remarking repeatedly on the stench. It got bad enough that, on the Saturday night during the race, the sewage wagon came by to try and drain the pond. The pond which, being only feet away from, gave me a bug that pretty much ruined the entire trip because I recovered near to going home and left during the race to get an earlier train.
At which point I got to the station only to find a reduced TGV service owing to industrial action.