... , oil refineries, oil tank of fill stations, chemical reactions pond, the lining of settling basin, second lining, etc)6 ... dissolving pool, settling basin, stock dump, lining of tailing pond, etc)7.Agriculture (reservoirs, drinking water tank, water storage ... sea slug tank)9.Salt industry (crystallization pond, thatch of salt pond, salt membrane, plastic thatch of salt pond ) pvc waterproof membrane