Interpreting QA/QC Results

Regular analysis of QA/QC data is essential for maintaining data quality. Control Charts Standard Control Charts Plot standard results over time with: - Center line certified value - Warning limits ±2 SD - Control limits ±3 SD Blank Control Charts Plot blank results with: - Center line 0 or detection limit - Action limit typically 5-10x detection Common Issues Standard Failures - Consistent bias: laboratory calibration issue - Random scatter: poor precision - Trend: reagent degradation Blank Failures - After high-grade: carry-over contamination - Random: laboratory contamination - Batch-specific: preparation equipment

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Verification resources

Cross-check terminology, classification, methods, and safety with these authoritative external resources.

Mineral Exploration Best Practice Guidelines — Canadian Institute of Mining, Metallurgy and Petroleum. Professional guidance for representative sampling, chain of custody, laboratories, security, and QA/QC.
National Instrument 43-101 — British Columbia Securities Commission. Canadian mineral-project disclosure requirements and related technical-report framework.

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Interpreting QA/QC Results

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Verification resources