Common use of Preferred Performance Standards Clause in Contracts

Preferred Performance Standards. (a) For materials of concern and residuals containing materials of concern a direct processor must only use downstream vendors who conform with all of the performance standards in this document. (i) A direct processor must review its downstream vendors’ conformity to these standards at least every two years and more frequently as changes in circumstances warrant. The direct processor must provide the verification and documentation to Ecology upon request. (ii) A direct processor must document the chain of custody of all materials of concern and their residuals through final disposition. (iii) A direct processor does not need to conduct the due diligence for downstream vendors certified to the performance standards in this document by an accredited body.