Quality Control and Assurance
Sampling of trenches and pits and reverse circulation drilling and sample preparation were performed by Rio Alto personnel and were carried out under strict protocols recommended in the NI 43-101 Technical Report dated July 31, 2010 prepared by Coffey Mining Pty Ltd for the Company (the "Report"). RC samples were taken every 2m and split in half to yield seven to ten kilogram samples. Drill sample recovery was generally in excess of 90%. Rio Alto has a rigorous QA/QC program over the chain-of-custody of samples and the insertion of blanks, duplicates, and certified reference standards in each batch of samples. Samples were shipped to CERTIMIN in Lima where they were dried, crushed, pulverized, and assayed. All gold assays were obtained by standard 50g fire assaying with AA finish. CERTIMIN is an ISO 9001:20008 certified laboratory.
Enrique Garay, M Sc. P. Geo. (AIG Member), Vice President Geology of Rio Alto is the Qualified Person responsible for the management of the exploration program and disclosure of the exploration results as defined by National Instrument 43-101. Mr. Garay has read and approved the scientific and technical information in this news release. For additional information regarding the recommended sampling protocols please refer to the Report, a copy of which is available under Rio Alto's SEDAR profile at www.sedar.com.
This news release contains certain forward-looking information including statements concerning expected exploration programs and related costs. All statements included herein, other than statements of historical fact, are forward-looking information and such information involves various risks and uncertainties. There can be no assurance that such information will prove to be accurate, and actual results and future events could differ materially from those anticipated in such information. A description of assumptions used to develop such forward-looking information and a description of risk factors that may cause actual results to differ materially from forward-looking information can be found in Rio Alto's disclosure documents on the SEDAR website at www.sedar.com. Rio Alto does not undertake to update any forward-looking information except in accordance with applicable securities laws.
To learn more about Rio Alto Mining Limited, please visit: www.rioaltomining.com or Rio Alto's SEDAR profile at www.sedar.com.
ON BEHALF OF THE BOARD OF
RIO ALTO MINING LIMITED
Alex Black, President, CEO & Director
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Rio Alto Mining Limited
President, CEO & Director
+511 625 9900
Rio Alto Mining Limited
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