Source: https://www.stmalo-agglomeration.fr/tl_files/client/st_malo_agglo/pdf/Eau%20et%20assainissement/Spe%CC%81cifications-techniques-concernant-la-conception-et-l%E2%80%99exe%CC%81cution-des-travaux%20d%E2%80%99assainissement-sur-le-territoire-de-Saint-Malo-Agglome%CC%81ration-24-02-20.pdf