Duplicate Samples - Reverse Circulation Rotary Clause Samples

Duplicate Samples - Reverse Circulation Rotary. Duplicate samples were taken in the field at the drill rig every 100 feet and were used to evaluate sampling protocols at the rig to ensure adequate representation of material was being obtained. Duplicate samples should fall within 30% of the original assay with a failure rate not exceeding 1 in 10 samples. If the failure rate exceeds 1 in 10 samples then collection methods at the rig need to be modified.