Technical Report for the Fort Knox Mine - Kinross Gold

Fort Knox Mine Technical Reportpicked-up on a weekly basis by a secondary lab, pulverized, further split to 250 to 300grams and assayed. In addition, every 40th sample was re-assayed by the primary lab.In 2006, the even numbered samples, 20 th , 40 th , 60 th , etc., were pulverized by AlaskaAssay Laboratories and then shipped to ALS Chemex for “secondary lab” checkassaying. Since a new primary lab was being used in the 2006 program, a morerigorous program of primary lab duplicate checks was instituted to monitor theirperformance. Primary duplicates were selected randomly by the primary lab, andincreased in frequency to an average of 1 duplicate per 7 samples. The currentverification practice for the primary lab is to re-assay the first and then every 20 th samplein each job.Assay results are received electronically from Chemex, American, and Bondar-Clegg(prior to 2002) and Alaska Assay labs. Final certified “hard” copies of the assaycertificates are delivered later and retained in the Company’s files.FGMI’s technical staff monitors the results on a regular basis. Any skewed results areinvestigated to determine the cause of the difference. The authors consider the results ofthe past operating year to be within acceptable error levels.13.3 Blanks ProgramFGMI also inserts blank or unmineralized samples into each sample shipment as part ofthe operation’s standard procedures. Returned sample rejects that assay below thedetection limit (