This is from a KRY pr back in 2000 on Revemin and collecting Tolls:

The Company also has implemented programs that address the potential represented by the numerous small mining operations in the El Callao mining district. One of these programs offers miners within a 100-kilometre radius of the Company's Revemin Mill the opportunity to process their ore grade materials there on a toll basis. Yet another program will create joint ventures with local miners to give them the benefit of the Company's experience with modern mining techniques so they can better develop small ore bodies.