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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| C&D Septic Services Limited Liability Company | Lebanon, NH | — | Septage Hauler | 2422 |
| Cameron Goodrich | Colchester, VT | — | Designer | — |
| Carl Crawford | Ferrisburgh, VT | — | Designer | — |
| Carlton Fuller | Barre, VT | — | Designer | — |
| Casella Waste Management, Inc. | Rutland, VT | — | Septage Hauler | 89 |
| Chad Allen | Port Orchard, WA | — | Designer | — |
| Chad Branon | Troy, NH | — | Designer | — |
| Charles Baker | Greenfield Center, NY | — | Designer | — |
| Charles C. Haff Jr., Dba Royal Flush Sanitation | Lower Waterford, VT | — | Septage Hauler | 789 |
| Cherrish Kinne | Wells, VT | — | Designer | — |
| Christina Haskins | Springfield, VT | — | Designer | — |
| Christopher Austin | Middlesex, VT | — | Designer | — |
| Christopher Cole | Manchester Center, VT | — | Designer | — |
| Christopher Gendron | Colchester, VT | — | Designer | — |
| Christopher Holzwarth | Windsor, VT | — | Designer | — |
| Christopher Leister | Bethel, VT | — | Designer | — |
| Christopher Page | Burlington, VT | — | Designer | — |
| Christopher Ponessi | Bennington, VT | — | Designer | — |
| Christopher Williams | Moretown, VT | — | Designer | — |
| Clean Harbors Environmental Services, Inc. | Norwell, MA | — | Septage Hauler | 107 |
| Clifford Collins | Burlington, VT | — | Designer | — |
| Cobrita Trucking Inc | Revere, MA | — | Septage Hauler | 2613 |
| Colen Johnson | Mountain City, TN | — | Designer | — |
| Complete Septic Services, Llc | Isle LaMotte, VT | — | Septage Hauler | 676 |
| Corinna Martino | Rochester, NH | — | Designer | — |
| Cory Jones | Newport, VT | — | Designer | — |
| Craig Chase | Barre, VT | — | Designer | — |
| Craig Jewett | Quechee, VT | — | Designer | — |
| Cristian Jablonski | Swanton, VT | — | Designer | — |
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