Chemical test data for CBM and subgrade below the A1(M) carriageway.
| Depth (m below road level) | Material | Acid-soluble sulfur (ASS – %S) | Total sulfur (TS – %S) |
|---|---|---|---|
| 0·6 | Fine CBM | 0·18–0·20 | 0·20 |
| 0·62–0·82 | Glacial Clay with gravel | 0·14–0·18 | 0·21 |
| 0·82–1·05 | Glacial Clay with gravel | 0·53–0·76 | 0·61–0·81 |
| 1·2–1·3 (TP1) | Glacial Clay with gravel | 1·16 | 1·23 |
| 1·37–1·50 (TP2) | Weathered Oxford Clay | 0·10 | 0·55 |
| 1·9–2·1 (TP1) | Weathered Oxford Clay | 4·53 | 4·50 |
| 2·5–2·9 (TP2) | Weathered Oxford Clay | 0·79 | 0·84 |
| Depth (m below road level) | Material | Acid-soluble sulfur (ASS – %S) | Total sulfur (TS – %S) |
|---|---|---|---|
| 0·6 | Fine CBM | 0·18–0·20 | 0·20 |
| 0·62–0·82 | Glacial Clay with gravel | 0·14–0·18 | 0·21 |
| 0·82–1·05 | Glacial Clay with gravel | 0·53–0·76 | 0·61–0·81 |
| 1·2–1·3 (TP1) | Glacial Clay with gravel | 1·16 | 1·23 |
| 1·37–1·50 (TP2) | Weathered Oxford Clay | 0·10 | 0·55 |
| 1·9–2·1 (TP1) | Weathered Oxford Clay | 4·53 | 4·50 |
| 2·5–2·9 (TP2) | Weathered Oxford Clay | 0·79 | 0·84 |
%S, determined as percent sulfur.
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