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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Tamer Nawar | Attleboro, MA | — | Installer | L2016 |
| Ted Buhre | West Greenwich, RI | — | Installer | L1547 |
| Terrence J Greenlief | Harmony, RI | — | Designer (Class II) | D2009 |
| Terri A Gentes | Saunderstown, RI | — | Designer (Class III) | D3091 |
| Terri A Gentes | Saunderstown, RI | — | Installer | L1961 |
| Terry L Clark | Chepachet, RI | — | Installer | L1292 |
| The Throne Depot | N. Billerica, MA | — | Septage Hauler | 1001 |
| Thomas A Davis Jr. | Cumberland, RI | — | Installer | L1393 |
| Thomas E D'Angelo | Glocester, RI | — | Designer (Class IV Soil Evaluator) | D4003 |
| Thomas E D'Angelo | Glocester, RI | — | Installer | L0649 |
| Thomas E Shalvey | Warwick, RI | — | Installer | L1043 |
| Thomas F LePore | Cumberland, RI | — | Installer | L1099 |
| Thomas F Menna | Johnston, RI | — | Installer | L0864 |
| Thomas J Condon III | Chepachet, RI | — | Installer | L1782 |
| Thomas J Ducharme | Pascoag, RI | — | Designer (Class III) | D3144 |
| Thomas J Principe Jr. | Tiverton, RI | — | Installer | L0842 |
| Thomas J Principe, III | Tiverton, RI | — | Designer (Class III) | D3105 |
| Thomas J Principe, III | Tiverton, RI | — | Designer (Class IV Soil Evaluator) | D4075 |
| Thomas M Barbosa | Cranston, RI | — | Installer | L1835 |
| Thomas M Gadoury | Jamestown, RI | — | Designer (Class I) | D1192 |
| Thomas M Gadoury | Jamestown, RI | — | Installer | L1501 |
| Thomas M Silvia | Swansea, MA | — | Installer | L1165 |
| Thomas P Colucci | Chepachet, RI | — | Installer | L1085 |
| Thomas R McGreevy | Exeter, RI | — | Installer | L1502 |
| Thomas R Perry | Woonsocket, RI | — | Installer | L1882 |
| Thomas W Angell | North Scituate, RI | — | Installer | L1539 |
| Thomas W Burdick Jr | Westerly Services, RI | — | Designer (Class I) | D1219 |
| Thomas W Burdick Jr | Services Westerly, RI | — | Installer | L1549 |
| Timothy A Stasiunas | Charlestown, RI | — | Installer | L0830 |
| Timothy Braz | Portsmouth, RI | — | Installer | L1847 |
| Timothy E Brown | Westport, MA | — | Installer | L2051 |
| Timothy J Behan | Providence Inc, RI | — | Designer (Class III) | D3040 |
| Timothy M Twohig | Cranston, RI | — | Designer (Class IV Soil Evaluator) | D4073 |
| Timothy P Mahoney | North Kingstown, RI | — | Installer | L1102 |
| Timothy Stasiunas A | Charlestown, RI | — | Designer (Class I) | D1049 |
| Timothy T DaSilva | LLC Fall River, MA | — | Installer | L1915 |
| Timothy W Smith | Foster, RI | — | Installer | L2017 |
| Todd A Reynolds | Exeter, RI | — | Installer | L1234 |
| Todd Chaplin | Portsmouth, RI | — | Designer (Class III) | D3006 |
| Todd F Santos | Coventry, RI | — | Designer (Class I) | D1141 |
| Todd F Santos | Coventry, RI | — | Installer | L1041 |
| Todd Smith | West. Kingston, RI | — | Installer | L1367 |
| Tom Arkins | Little Compton, RI | — | Installer | L1543 |
| Tony Raposo | North Kingstown, RI | — | Installer | L0989 |
| Torti Services Inc | Harmony, RI | — | Septage Hauler | 906 |
| Town Sanitation | Seekonk, MA | — | Septage Hauler | 584 |
| Travers Plumbing | Tiverton, RI | — | Septage Hauler | 858 |
| Trevor J Thurber | Rehoboth, MA | — | Installer | L1962 |
| Tucker R Neale | Alna, ME | — | Installer | L1814 |
| Tyler A Paliotta | Johnston, RI | — | Installer | L2057 |
| Tyler W Ross | East Greenwich, RI | — | Installer | L2003 |
| Tyrel E Rhodes | Ashaway, RI | — | Designer (Class I) | D1156 |
| Tyrel E Rhodes | Ashaway, RI | — | Installer | L0856 |
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