Certifications for Duane Williams
| Certification | Completion Date | Expiration Date | Status |
|---|---|---|---|
| West Virginia Aggregate Sampling | 05/22/2025 | 12/31/2028 | Active |
| West Virginia PCC Inspector | 06/25/2025 | 12/31/2028 | Active |
| WV Portable Nuclear Gauge Safety & U.S. D.O.T. Hazmat Training (NUREG 1556, 49 CFR 172 Subpart H) | 01/12/2026 | 01/12/2029 | Active |
| West Virginia Soil and Aggregate Compaction Technician | 02/12/2026 | 12/31/2031 | Active |
| West Virginia Asphalt Field and Compaction Technician with Gauge | 02/25/2026 | 12/31/2031 | Active |