| Version | Date | Author | Changes |
|---|---|---|---|
| 1.0 | 01/04/2025 | Sean Ashton | Initial issue (S.O.P 6.1 / 9.6) |
| 2.0 | 17/02/2026 | Sean Ashton | Consolidated to flowchart procedure format — staff model, manuals as core reference |
ISO 14001:2015 Clause 9.1.1 — Monitoring, measurement, analysis and evaluation