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
accommodated through their blind inclusion in the sample stream and analysis of duplicate
prepared pulp splits are also requested for each batch.
Apogee`s protocol also includes a check sampling program based on analysis of sample
splits at a second accredited laboratory. Check samples submitted to the check laboratory
are processed using the same preparation and analytical techniques as used by ALS in Lima.
The ALS laboratory in La Serena, Chile provided initial second laboratory analytical services
for the Apogee programs, results of which are discussed in report Section 13. Since January
2010, starting with drill hole PUD 140 samples, all check analyses are done at SGS in Lima,
Peru.
In addition to chemical analysis, bulk density measurements (specific gravity) were
systematically collected by Apogee staff using standard water emersion methods and
unsealed core samples. Micon (Pressacco and Shoemaker, 2009) reviewed ASC and early
Apogee density determination methods and recommended that these be modified to include
more representative sampling methods in non-mineralized areas, and be carried out
continuously through mineralized zones. Procedures were subsequently modified and
measurements thereafter were collected for continuous 10 m sampled intervals where no
observed sulphide mineralization was present and for all sampled intervals within recognized
mineralized zones. Micon also noted that samples were not being wax sealed and advised
that sealing would be advisable for some samples due to higher porosity and low
permeability seen in some samples. Characteristics of lithology and alteration were also
recorded as part of the density program and all information was assembled in digital
spreadsheets. Results of the density measurement programs appear in report section 13.
The authors are satisfied that Apogee’s sample preparation, analysis and security
methodologies are sufficient for a project of this size and that suitable precautions are being
taken to identify irregularities in sample analytical results.
11.6 Quality Control and Assurance for ASC 2002-2003 Programs
QAQC procedures pertinent to the ASC programs were not documented in support
information reviewed by Mercator for this report. However, the first drilling program carried
out by Apogee in 2006 consisted of 19 holes totaling approximately 4,150 m drilled to confirm
earlier ASC analytical data. Full QAQC protocols instituted by Apogee were applied to this
program and results of an Apogee re-drill program correlate well with those of ASC. Such
correlation suggests that acceptable standards were being met by ASC.
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