# Diamond Materials, LLC: 2 staff members newly certified for Delaware sediment and stormwater site work

**Score:** 50/100

| Field | Value |
|---|---|
| Firm | Diamond Materials, LLC |
| Firm type | Site, civil or general contractor |
| Staff certified, last 180 days | 2 |
| First certification in window | 2026-07-15 |
| Latest certification | 2026-07-22 |
| Stage | More staff certified (firm already in program) |
| Certified before the window | 13 |
| Firm first seen | 2022-08-20 |
| Total certifications on file | 15 |

## Why this score
- Two staff certified.
- Builds or disturbs sites directly.

Source: Delaware DNREC Sediment and Stormwater Contractor Training Program certification holders (data.delaware.gov) (https://data.delaware.gov/d/eagm-iwjf). Last refreshed: 2026-10-28T20:50:58.176Z.
From DNREC's list of Sediment and Stormwater Contractor Training Program certification holders, grouped by the employer each trainee gave, so spellings of one firm may split. Firm level only: no trainee names are stored. Certification shows readiness for Delaware land-disturbing work, not a specific contract. Verify with DNREC.