| S.No. | Field / Checkpoint | Reference | Status |
|---|---|---|---|
| A. BORE HOLE IDENTITY | |||
| A1 | BH no. + coordinates + RL + depth (m) Acceptance: Per drawing | Per investigation drawing | OK NC NA |
| A2 | Drilling method — auger / rotary / DCDM / shell + auger Acceptance: Method per site | Per IS 1892 | OK NC NA |
| A3 | Drilling rig + diameter (typically 100-150mm) Acceptance: Per rig | Per IS 1892 | OK NC NA |
| A4 | Driller + supervisor + date + weather Acceptance: Logged | Per session | OK NC NA |
| B. STRATIGRAPHIC LOG (per layer) | |||
| B1 | Depth (m) — from / to + thickness Acceptance: To 0.1m precision | Per strata change | OK NC NA |
| B2 | Soil description — type + color + consistency / density Acceptance: Per visual + manual | Per IS 1498 classification | OK NC NA |
| B3 | Standard penetration test (SPT) N-value per 30cm Acceptance: Per code | IS 2131 — every 1.5m depth | OK NC NA |
| B4 | Sample type — disturbed (DS) / undisturbed (UDS) / NX core Acceptance: Per layer | Per sampling plan | OK NC NA |
| B5 | Lab tests to be performed (sieve / consistency / shear / consolidation) Acceptance: Per IS 2720 | Per sample type + soil | OK NC NA |
| C. GROUNDWATER + ROCK | |||
| C1 | Water table depth + observation method Acceptance: Per IS 1892 | After 24 hrs typically | OK NC NA |
| C2 | Rock encountered — depth + RQD (Rock Quality Designation) Acceptance: For rock layers | Per ISRM standards | OK NC NA |