| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. BOREHOLE LOCATION AND SETUP | |||
| A1 | GPS coordinates and site survey Acceptance: GPS coordinates ±1 m; marked on site plan; elevation recorded; utility location verified | Cl. 3.1 — Precise location documented | |
| A2 | Ground level datum and elevation Acceptance: Ground level RL recorded; referred to benchmark; accuracy ±0.1 m | Cl. 3.2 — Reference level established | |
| A3 | Drilling equipment and method selection Acceptance: Method per IS 1892; equipment suitable for soil type; capacity adequate for depth | Cl. 3.3 — Appropriate method used | |
| A4 | Safety precautions and setup Acceptance: Safety barriers; warning signs; PPE enforced; first aid available | Cl. 3.4 — Site safety | |
| B. DRILLING EXECUTION AND MONITORING | |||
| B1 | Drilling rate and blow count (Standard Penetration Test) Acceptance: SPT done at 1.5 m intervals; blow count (N) recorded; weight/fall height verified; sampling | Cl. 4.1 — SPT procedure per standard | |
| B2 | Casing and drilling fluid circulation Acceptance: Casing advanced as required; fluid level maintained; no loss of circulation; slurry quality | Cl. 4.2 — Hole stability maintained | |
| B3 | Borehole diameter and alignment Acceptance: Diameter per specification; verticality ≤ 1°; uniform diameter; no collapse | Cl. 4.3 — Hole quality | |
| B4 | Groundwater level and observation Acceptance: Water level recorded at each interval; depth and elevation noted; artesian conditions noted | Cl. 4.4 — Water table identified | |
| C. SOIL SAMPLING AND RECOVERY | |||
| C1 | Soil sample collection and preservation Acceptance: Samples taken per IS 1892; labeling clear; sealed in jars; stored properly | Cl. 5.1 — Sample quality | |
| C2 | Disturbed vs. undisturbed samples Acceptance: Disturbed samples for index testing; undisturbed for strength; ring sampler for clays | Cl. 5.2 — Appropriate sampling method | |
| C3 | Core recovery and condition assessment Acceptance: Recovery percentage calculated; RQD (Rock Quality Designation) for rock; fracture mapping | Cl. 5.3 — Core quality documentation | |
| C4 | Sample labeling and chain of custody Acceptance: Labels with borehole ID, depth, date; logged in sample register; signed handover | Cl. 5.4 — Sample identification | |