| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. CONSTANT HEAD PERMEABILITY TEST | |||
| A1 | Sample preparation and saturation Acceptance: Sample saturated by backflushing; pore air removed; saturation achieved within 24–48 hours | Cl. 3.1 — Sample saturation required | |
| A2 | Permeameter setup and calibration Acceptance: Permeameter assembled; water level markers calibrated; no leakage; constant head maintained | Cl. 3.2 — Equipment readiness | |
| A3 | Hydraulic head application Acceptance: Head applied gradually; steady-state flow achieved; head constant throughout test (≤ 1 cm variation) | Cl. 3.3 — Test conditions | |
| A4 | Flow rate measurement and collection Acceptance: Water collected over time interval; volume measured (±1 mL accuracy); minimum 3 measurements | Cl. 3.4 — Discharge measurement | |
| A5 | Coefficient of permeability (k) calculation Acceptance: k = (Q × L) / (A × h × t); units in cm/sec or m/sec; consistency check between runs | Cl. 3.5 — Result calculation | |
| B. FALLING HEAD PERMEABILITY TEST | |||
| B1 | Standpipe diameter selection Acceptance: Diameter selected for soil type; fine sand: larger diameter; clay: small diameter | Cl. 4.1 — Appropriate standpipe | |
| B2 | Initial and final water levels Acceptance: Initial level recorded; final level recorded; time interval noted; minimum 1 hour for test | Cl. 4.2 — Level measurement | |
| B3 | Falling head data collection Acceptance: Level measured at fixed time intervals; at least 5 measurements; recorded in table | Cl. 4.3 — Water level drop | |
| B4 | Coefficient k from falling head formula Acceptance: k = (a × L) / (A × t) × ln(h1/h2); units cm/sec; averaged from multiple tests | Cl. 4.4 — Calculation | |
| C. IN-SITU PERMEABILITY TEST (FIELD PERMEAMETER) | |||
| C1 | Test location and borehole preparation Acceptance: Borehole stable; test interval clearly defined; casing above test zone; open interval ≥ 0.5 m | Cl. 5.1 — Borehole readiness | |
| C2 | Permeameter device installation Acceptance: Packer or standpipe installed; no leakage; test interval isolated; water header established | Cl. 5.2 — Device setup | |
| C3 | Water supply and head maintenance Acceptance: Water supplied at constant head; supply rate ≤ infiltration rate; pressure gauge monitored | Cl. 5.3 — Constant head | |
| C4 | Flow rate measurement Acceptance: Flow measured by volume collection over time; minimum 3 readings; steady-state achieved | Cl. 5.4 — Discharge quantification | |