Pulacayo Project Feasibility Study - Apogee Silver

Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report
090644-3-0000-20-IFI-100
Figure 12.4: Core Facility Staff Assisting with Check Sampling — April 2012
12.3 Quality Control and Quality Assurance (QAQC)
12.3.1 Apogee Programs 2006 – 2012
The Apogee drilling programs covered in the October 2011 mineral resource estimate by
Mercator occurred between 2006 and July of 2011, with the last drill hole included in that
resource being PUD214. QAQC results for the Apogee programs that contributed to the
previous estimate were presented by Cullen et al. (2012) and the discussions presented
below that pertain to these programs are taken directly from that source with a minimum of
modification. QAQC results that pertain to oxide zone drilling carried out between July 2011
and December 2011 by Apogee are also described below.
Apogee Programs 2006 to 2012
Drill core sampling carried out by Apogee during the 2006 through 2012 programs on the
Pulacayo property were subject to a QAQC program administered by the company. This
included submissions of blank samples, duplicate split samples of quarter core and half core,
certified analytical standards, Apogee field standards and analysis of check samples at a
third party commercial laboratory. Additionally, internal laboratory reporting of quality control
and assurance sampling was monitored by Apogee on an on-going basis during the course
of the project. Details of the various components are discussed below under separate
headings.
QAQC discussions for certified and in-house standards, blanks and duplicate splits pertaining
to Apogee programs completed prior to January 2010 were previously disclosed in the Micon
PEA (Pressacco et al. 2010) for Pulacayo. After review of these results, Mercator concurs
with the opinion expressed by Micon that drill core sample data associated with the earlier
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