PTBA Internship Report · internship-4-2b
Calorific-value relationships — Seam A2
The source reports low ash (about 1.30–3.42%) and low sulfur (about 0.18–0.24%) for the plotted Seam A2 samples. That makes A2 the cleanest interval in this limited comparison, but it does not prove a raised-mire origin or a uniform product specification.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
The source reports low ash (about 1.30–3.42%) and low sulfur (about 0.18–0.24%) for the plotted Seam A2 samples. That makes A2 the cleanest interval in this limited comparison, but it does not prove a raised-mire origin or a uniform product specification. Sample count, basis of analysis, sampling support and laboratory uncertainty must be reported before the narrow range is extrapolated across the seam model.
- Source
- Private internship source vault · Chapter IV record
- Location in source
- 4.3.2 Seam A2
- Image quality
- Source scan
- Record ID
- internship-4-2b
