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The formation of a groundwater aquifer in a unique territory disturbed by the quarrying of a phosphorite deposit in the southwest of the Leningrad region, built up with industrial facilities for ore processing, auxiliary production, and waste storage is considered. During the quarrying of the phosphorite layer, the hydrogeological section was disturbed, the filtration and capacitive properties of the soils of the aeration zone and water-bearing rocks changed. In the zone of active quarries, during dewatering, the ...