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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Sawyers Sanitation Service Incorporated | — | — | Septage Hauler | 5112F |
| Sawyers Sanitation Service Incorporated | — | — | Septage Hauler | 5262F |
| Sawyers Sanitation Services | — | — | Septage Hauler | 6154F |
| Scott L West Construction | — | — | Installer | 2423E3 |
| Scott L West Construction | — | — | Septage Hauler | 2423F |
| Scotton'S Sanitation Llc | — | — | Septage Hauler | 5569F |
| Septic Masters | — | — | Installer | 4404E3 |
| Septic Masters | — | — | Septage Hauler | 4404F |
| Septic Masters | — | — | Installer | 6151E2 |
| Septic Masters | — | — | Septage Hauler | 6151F |
| Septic Masters | — | — | Septage Hauler | 6350F |
| Sterling Cabinetry & Carpentry | — | — | Installer | 2351E3 |
| Stillwater Septic Svs | — | — | Septage Hauler | 5842F |
| Streett Septic Services, Llc | — | — | Installer | 5496E3 |
| Streett Septic Services, Llc | — | — | Septage Hauler | 5496F |
| Sunnyfield Contractors | — | — | Installer | 2011E3 |
| Sussex County Council | — | — | Septage Hauler | 5194F |
| Sussex County Council | — | — | Septage Hauler | 5399F |
| Sussex County Council | — | — | Septage Hauler | 5495F |
| Sussex County Council | — | — | Septage Hauler | 6327F |
| Sussex County Council | — | — | Septage Hauler | 5270F |
| Sussex County Council | — | — | Septage Hauler | 6302F |
| Sussex County Environmental Services | — | — | Septage Hauler | 6052F |
| Sussex County Environmental Services | — | — | Septage Hauler | 6051F |
| Sussex County Environmental Services | — | — | Septage Hauler | 6248F |
| Sussex County Government | — | — | Septage Hauler | 5537F |
| Sussex County Government | — | — | Septage Hauler | 6374F |
| Sussex Septic Services | — | — | Installer | 5962E1 |
| Sussex Septic Services | — | — | Septage Hauler | 5962F |
| Sussex Technical High School | — | — | Septage Hauler | 5641F |
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