Total amounts of overburden, rock, tailings, and sludges and their associated risks; SASB Metals & Mining Sustainability Accounting Standard SASB EM-MM-weight of tailings waste, percentage recycled. 2 N/R: 2019 former Goldcorp sites (Argentina, Canada and Mexico) omit total tailings produced; in future years, as site standards and reporting systems are integrated, these sites will report more detailed data to include tailings disposals by type (surface, open pit and sub-surface disposals) in addition to total tailings disposed.