A method for managing a live stream of waste stream fluids in which a controller of an applicator unit accesses data indicative of a first concentration of at least one contaminant in a volume of waste stream fluids loaded in the applicator unit, and a contaminant capacity profile indicative of an amount of the at least one contaminant to be applied in the land area. At least a portion of the volume of waste stream fluids loaded in the applicator unit is applied on at least a portion of a land area based on the first concentration of the at least one contaminant in the volume of waste stream fluids and the contaminant capacity profile. The controller generates an updated contaminant capacity profile based at least in part on the volume of waste stream fluids applied on the land area and the first concentration of the at least one contaminant in the volume of waste stream fluids applied to the land area.