How should a facility determine the total weight of hazardous wastes it generates per month?

A facility must determine the amount of hazardous waste it generates within a calendar month by adding together the volumes of hazardous wastes and the volumes of acutely hazardous wastes generated by each department located on-site. Off-site facilities must separately determine the amount of hazardous waste they generate. The hazardous waste rules are site-specific therefore each hazardous waste generator, by site, must account for the hazardous wastes generated at their facility.