In order to comply with the legislation, the various players in the sector must respect a set of regulations. Here are the main ones and their associated links:
Aeration, sanitation
https://www.legifrance.gouv.fr/codes/section_lc/LEGITEXT000006072050/LEGISCTA000018488886
The Industrial Emissions Directive (IED), BREFs, BATs
https://www.ineris.fr/fr/risques/dossiers-thematiques/directive-emissions-industrielles-ied-bref-mtd
ATEX regulations
https://www.inrs.fr/risques/explosion/reglementation-textes-reference.html
REACH regulations
https://www.ecologie.gouv.fr/politiques-publiques/reglementation-reach