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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Marc Burnell | Danville, VT | — | Designer | — |
| Mark Bannon | Randolph, VT | — | Designer | — |
| Mark Downing | Essex Junction, VT | — | Designer | — |
| Martin Courcelle | Colchester, VT | — | Designer | — |
| Mary Ellen Parkman | Chelsea, VT | — | Designer | — |
| Matthew Houghton | Newport, VT | — | Designer | — |
| Matthew Otterman | West Topsham, VT | — | Designer | — |
| Matthew Reed | Hyde Park, VT | — | Designer | — |
| Matthew Roberts | Wallingford, VT | — | Designer | — |
| McVac Environmental Services, Inc. | New Haven, CT | — | Septage Hauler | 719 |
| Merrill Mundell | Wilmington, VT | — | Designer | — |
| Micayla Schambura | Colchester, VT | — | Designer | — |
| Michael Beyer | Stratton, VT | — | Designer | — |
| Michael Carbonneau | Littleton, NH | — | Designer | — |
| Michael Foster | Bellows Falls, VT | — | Designer | — |
| Michael Gervais | Enosburg Falls, VT | — | Designer | — |
| Michael Marquise | Bellows Falls, VT | — | Designer | — |
| Michael Szymanski Dba Ms Septic Service | Montpelier, VT | — | Septage Hauler | 441 |
| Michael Wall | Stamford, VT | — | Designer | — |
| Michael Whipple | Chelsea, VT | — | Designer | — |
| Michaud Septic Service Llc | East Hardwick, VT | — | Septage Hauler | 355 |
| Michel Lapointe | Essex Junction, VT | — | Designer | — |
| Miles Waite | Burlington, VT | — | Designer | — |
| Mr. Bult'S, Inc. (Dba Mbi) | Newport, VT | — | Septage Hauler | 822 |
| Munoz Trucking Llc | Revere, MA | — | Septage Hauler | 2506 |
| Myers Container Service Corp. | Winooski, VT | — | Septage Hauler | 364 |
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