Rhode Island licenses the installers and designers who build and design onsite wastewater (septic) systems and permits the transporters who haul septage, all through the Department of Environmental Management. This page lists the active licensees from the official state registries.
| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| A Rego Septic Service | Portsmouth, RI | — | Septage Hauler | 3 |
| A&d Sanitation | Somerset, MA | — | Septage Hauler | 508 |
| Aaron Medeiros | Dartmouth, MA | — | Installer | L1865 |
| Aaron Muniz | Warwick, RI | — | Installer | L1864 |
| Abm Enterprise Llc | Cranston, RI | — | Septage Hauler | 958 |
| Acme Sanitation | Little Compton, RI | — | Septage Hauler | 316 |
| Action Enterprises Services, Inc. | Lowell, MA | — | Septage Hauler | 984 |
| Adam E Rosenblatt | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4051 |
| Adam N Labonte | West Greenwich, RI | — | Installer | L2028 |
| Adam S White | North Kingstown, RI | — | Installer | L1772 |
| Adolf F Haffenreffer | Little Compton, RI | — | Installer | L0940 |
| Alan C Pittman | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4100 |
| Alan J Ouellette | Attleboro, MA | — | Installer | L1268 |
| Alanson M Roberts | — | — | Installer | L0805 |
| Albert Marsocci | Cranston, RI | — | Installer | L1119 |
| Alessandro M Venditti | Cranston, RI | — | Installer | L2049 |
| Alexander J Carey | Coventry, RI | — | Installer | L2008 |
| Alexander J Gomes | Dighton, MA | — | Installer | L1951 |
| Alexander J Wynne | Providence, RI | — | Installer | L2009 |
| Alfred A Sousa | Tiverton, RI | — | Installer | L1872 |
| Alfred Cole Jr. | North Kingstown, RI | — | Installer | L0299 |
| Alfred R Dufresne | Dayville, CT | — | Installer | L1394 |
| Alfred W DiOrio | Ashaway, RI | — | Designer (Class II) | D2032 |
| Alfred W DiOrio | Ashaway, RI | — | Designer (Class IV Soil Evaluator) | D4004 |
| Alfred W DiOrio | Ashaway, RI | — | Installer | L0662 |
| Allan L Shear | Rumford, RI | — | Designer (Class III) | D3023 |
| Allison M Drake | Cranston, RI | — | Designer (Class IV Soil Evaluator) | D4105 |
| Amber K Fagan | Saunderstown, RI | — | Designer (Class I) | D1310 |
| Amber K Fagan | Saunderstown, RI | — | Installer | L1990 |
| Amber K Hardy | Inc Charlestown, RI | — | Designer (Class IV Soil Evaluator) | D4098 |
| Amy N Sonder | LLC Saunderstown, RI | — | Designer (Class II) | D2055 |
| Andrew A McNulty | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4099 |
| Andrew A Metivier | Rehoboth, MA | — | Installer | L2025 |
| Andrew C Smiley Jr. | Saunderstown, RI | — | Installer | L1366 |
| Andrew D Aubuchon | North Smithfield, RI | — | Installer | L2038 |
| Andrew D DeRiso | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4101 |
| Andrew E Morgan | — | — | Installer | L2018 |
| Andrew J Flynn | Wakefield, RI | — | Installer | L1611 |
| Andrew K Gardiner | Westerly, RI | — | Designer (Class III) | D3128 |
| Andrew P Kent | Middletown, RI | — | Installer | L1025 |
| Andrew Rego | Little Compton, RI | — | Installer | L1867 |
| Andrew V Sisson | Little Compton, RI | — | Installer | L2010 |
| Angelo M Raimondi | Coventry, RI | — | Designer (Class II) | D2015 |
| Angelo M Raimondi | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4016 |
| Angelo M Sullo | Pawcatuck, CT | — | Designer (Class III) | D3131 |
| Anthony A DiFazio | Johnston, RI | — | Installer | L1295 |
| Anthony A Esposito | Plymouth, MA | — | Designer (Class III) | D3153 |
| Anthony A Nenna | Westerly, RI | — | Designer (Class III) | D3078 |
| Anthony L Squillante | West Warwick, RI | — | Installer | L1978 |
| Anthony Mattiello Jr. | Cranston, RI | — | Installer | L1439 |
| Anthony S Macari | Cranston, RI | — | Installer | L1465 |
| Anthony T Pelloni | Ashaway, RI | — | Installer | L1417 |
| Anthony V Santilli | West Warwick, RI | — | Designer (Class I) | D1103 |
| Anthony V Santilli | West Warwick, RI | — | Installer | L0586 |
| Antonio M Pereira | Cranston, RI | — | Installer | L1690 |
| Armando J Ricci | Providence, RI | — | Designer (Class III) | D3069 |
| Armando J Ricci | Providence, RI | — | Installer | L1380 |
| Arthur F Smith Jr | Tiverton, RI | — | Installer | L1587 |
| Arthur J Frattini | Charlestown, RI | — | Installer | L0787 |
| Arthur Mercure, III | Smithfield, RI | — | Installer | L1155 |
| Arthur R Cripps Jr. | Coventry, RI | — | Designer (Class III) | D3030 |
| Arthur R Cripps Jr. | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4024 |
| Arthur S Clarke, III | Jamestown, RI | — | Installer | L0130 |
| Arthur W Beauregard | Westerly, RI | — | Installer | L0443 |
| Bain R Transue | Block Island, RI | — | Installer | L1771 |
| Bay State Sewage Disposal Inc | Lakeville, MA | — | Septage Hauler | 843 |
| Benjamin A Gadoury | Coventry, RI | — | Installer | L2060 |
| Benjamin J Caito | Warwick, RI | — | Designer (Class III) | D3149 |
| Benjamin J LaMountain | Oxford, MA | — | Installer | L1774 |
| Blake A Ruggieri | North Kingstown, RI | — | Installer | L1988 |
| Bradford A Smith | Foster, RI | — | Installer | L2026 |
| Brandon B Faneuf | Warwick, RI | — | Designer (Class IV Soil Evaluator) | D4059 |
| Brandon Fish | Wakefield, RI | — | Installer | L1373 |
| Brandon M Blanchard | Lincoln, RI | — | Designer (Class III) | D3101 |
| Brendan M Friend | Wyoming, RI | — | Installer | L1787 |
| Brian D Snow | North Scituate, RI | — | Installer | L1844 |
| Brian D Woodhead | Portsmouth, RI | — | Installer | L1672 |
| Brian M DaPonte | Warren, RI | — | Installer | L1836 |
| Brian P Brown | Hope, RI | — | Designer (Class I) | D1247 |
| Brian P Brown | Hope, RI | — | Installer | L0760 |
| Brian P Thalmann | Barrington, RI | — | Designer (Class III) | D3027 |
| Brian Putnam | Chepachet, RI | — | Installer | L0900 |
| Brian R King | Warwick, RI | — | Designer (Class IV Soil Evaluator) | D4010 |
| Brian R Kuchar | Sandwich, MA | — | Designer (Class III) | D3098 |
| Brian R LeClair | Hope, RI | — | Installer | L2039 |
| BRIGGS SEPTIC, Inc. | Saunderstown, RI | — | Septage Hauler | 349 |
| Bruce Brayman | Hope Valley, RI | — | Installer | L0881 |
| Bruce G Hagerman | Warwick, RI | — | Designer (Class III) | D3014 |
| Byron A Rymer | Portsmouth, RI | — | Installer | L1939 |
| Carl J Adamo | Lincoln, RI | — | Designer (Class III) | D3058 |
| Carlos Mendes | Riverside, RI | — | Installer | L0909 |
| Carmino Paliotta | Johnston, RI | — | Designer (Class I) | D1167 |
| Carmino Paliotta | Johnston, RI | — | Installer | L1363 |
| Carolyn J Doyle | Hope Valley, RI | — | Designer (Class III) | D3067 |
| Carolyn J Doyle | Hope Valley, RI | — | Designer (Class IV Soil Evaluator) | D4072 |
| Cassie's Cans | West Kingston, RI | — | Septage Hauler | 940 |
| Charee M Jackson | Charlestown, RI | — | Designer (Class III) | D3116 |
| Charles A Lang | North Scituate, RI | — | Installer | L1460 |
| Charles D Kenyon | West Kingston, RI | — | Installer | L0627 |
| Charles K Recchia | North Stonington, CT | — | Installer | L1965 |
| Charles N Botka Jr. | Charlestown, RI | — | Installer | L1245 |
| Charles R Franklin | Exeter, RI | — | Installer | L1560 |
| Charles W Harris Jr | Harmony, RI | — | Installer | L0919 |
| Chris J Cipriano | Cranston, RI | — | Designer (Class I) | D1299 |
| Chris J Cipriano | Cranston, RI | — | Installer | L1873 |
| Christian B Sutter Timothy S Tarbox D4041 | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4077 |
| Christian D Reeves | Block Island, RI | — | Installer | L1868 |
| Christine N Beaulieu-Shea | Providence, RI | — | Designer (Class III) | D3079 |
| Christopher A Duhamel | Inc. Cranston, RI | — | Designer (Class III) | D3011 |
| Christopher A Duhamel | Inc. Cranston, RI | — | Designer (Class IV Soil Evaluator) | D4006 |
| Christopher E DiFilippo | North Scituate, RI | — | Installer | L2046 |
| Christopher F Hallahan | Westbrook, CT | — | Installer | L2030 |
| Christopher Fonseca | Bristol, RI | — | Designer (Class I) | D1172 |
| Christopher Fonseca | Bristol, RI | — | Installer | L1076 |
| Christopher Francis | Bristol, RI | — | Installer | L1090 |
| Christopher Furtado | Dighton, MA | — | Installer | L1950 |
| Christopher J Blank | Warren, RI | — | Installer | L2042 |
| Christopher J Cordice | Wakefield, RI | — | Installer | L2045 |
| Christopher J Crook | Bellington, MA | — | Installer | L1323 |
| Christopher J DeAngelis | Seekonk, MA | — | Installer | L1478 |
| Christopher M Kent | West Greenwich, RI | — | Installer | L1526 |
| Christopher M Reynolds | East Greenwich, RI | — | Installer | L1982 |
| Christopher P Crowshaw | Inc. Wakefield, RI | — | Designer (Class III) | D3126 |
| Christopher P Crowshaw | Wakefield, RI | — | Installer | L1604 |
| Christopher R Freiberger | Foster, RI | — | Installer | L2020 |
| Christopher S Caouette | Cumberland, RI | — | Installer | L1893 |
| Christopher S Wilkie | Little Compton, RI | — | Installer | L1635 |
| Clayton L Manchester | Tiverton, RI | — | Installer | L2040 |
| Clement Rose | Tiverton, RI | — | Designer (Class I) | D1044 |
| Clement Rose | Tiverton, RI | — | Installer | L0588 |
| Cleveland H Howard Jr | Harrisville, RI | — | Installer | L2061 |
| Cody A Braz | Tiverton, RI | — | Installer | L2037 |
| Cody A O'Rourke | Cumberland, RI | — | Installer | L1906 |
| Cody J Oliver | Dayville, CT | — | Installer | L2023 |
| Coia Sanitation Llc | Cumberland, RI | — | Septage Hauler | 396 |
| Collin D Patterson | Exeter, RI | — | Installer | L1991 |
| Corey R Aiello | Wyoming, RI | — | Installer | L1944 |
| Craig R Carrigan | Wakefield, RI | — | Designer (Class III) | D3005 |
| Craig W Carpenter | Harrisville, RI | — | Designer (Class I) | D1256 |
| Craig W Carpenter | Harrisville, RI | — | Installer | L1755 |
| Croome Sanitation, Inc | Rehoboth, MA | — | Septage Hauler | 351 |
| Curtis M Briggs | Foster, RI | — | Designer (Class I) | D1312 |
| Curtis M Briggs | Foster, RI | — | Installer | L1996 |
| Curtis S Ruotolo | Scituate, RI | — | Designer (Class III) | D3139 |
| D H Keene Septic Svs, Inc | Blackstone, MA | — | Septage Hauler | 304 |
| Dana A Ralph | North Attleboro, MA | — | Installer | L1233 |
| Daniel C Sleboda | Smithfield, RI | — | Installer | L1594 |
| Daniel C Sleboda Jr. | Smithfield, RI | — | Installer | L1816 |
| Daniel DuBreuil | Cumberland, RI | — | Installer | L0973 |
| Daniel E Marcotte | North Smithfield, RI | — | Designer (Class I) | D1297 |
| Daniel E Marcotte | North Smithfield, RI | — | Installer | L1879 |
| Daniel F Harrington, III | Hope Valley, RI | — | Designer (Class II) | D2064 |
| Daniel H Keene | North Smithfield, RI | — | Designer (Class I) | D1026 |
| Daniel H Keene | North Smithfield, RI | — | Installer | L1144 |
| Daniel Houle | North Scituate, RI | — | Installer | L0222 |
| Daniel L Longley | North Kingstown, RI | — | Installer | L1100 |
| Daniel L Roberge | Newport, RI | — | Installer | L1885 |
| Daniel P Joubert Jr | Westerly, RI | — | Designer (Class III) | D3162 |
| Daniel P Joubert Jr | Westerly, RI | — | Designer (Class IV Soil Evaluator) | D4092 |
| Daniel P Joubert Jr. | Westerly, RI | — | Installer | L1791 |
| Daniel P Woods | Portsmouth, RI | — | Installer | L1845 |
| Daniel R Campbell | Plainville, MA | — | Designer (Class III) | D3095 |
| Daniel R Cotta | Exeter, RI | — | Designer (Class III) | D3029 |
| Daniel R Ray | Cumberland, RI | — | Installer | L1629 |
| Daniel W Konuch | Coventry, RI | — | Installer | L1117 |
| Daniel W Patterson | Exeter, RI | — | Designer (Class I) | D1037 |
| Daniel W Patterson | Exeter, RI | — | Installer | L0818 |
| Darlene M Gardner | Saunderstown, RI | — | Designer (Class I) | D1151 |
| Darlene M Gardner | Saunderstown, RI | — | Installer | L1397 |
| Darren P Hayward | Norwich, CT | — | Designer (Class III) | D3137 |
| David A Allen | Exeter, RI | — | Designer (Class I) | D1163 |
| David A Allen | Exeter, RI | — | Installer | L1386 |
| David A Johnson | Wakefield, RI | — | Designer (Class I) | D1314 |
| David A Johnson | Wakefield, RI | — | Installer | L1887 |
| David A King | North Kingstown, RI | — | Installer | L2041 |
| David A Medeiros | Dartmouth, MA | — | Installer | L1745 |
| David A Russo | Cranston, RI | — | Designer (Class III) | D3125 |
| David B Carnevale | Chepachet, RI | — | Installer | L1084 |
| David B Dow | Cumberland, RI | — | Designer (Class I) | D1014 |
| David B Dow | Cumberland, RI | — | Designer (Class IV Soil Evaluator) | D4037 |
| David B Dow | Cumberland, RI | — | Installer | L1314 |
| David Benn | Bradford, RI | — | Installer | L0679 |
| David C Duranleau | Warwick, RI | — | Designer (Class IV Soil Evaluator) | D4048 |
| David Cabral | Westport, MA | — | Installer | L1371 |
| David D Gardner | Narragansett, RI | — | Designer (Class II) | D2006 |
| David D Gardner | Narragansett, RI | — | Designer (Class IV Soil Evaluator) | D4050 |
| David D Morrocco | Johnston, RI | — | Installer | L1880 |
| David E Henrici | Salem, CT | — | Installer | L1021 |
| David E Provonsil | North Scituate, RI | — | Designer (Class III) | D3160 |
| David G Flynn | Attleboro, MA | — | Installer | L1898 |
| David H Merriam | Warwick, RI | — | Installer | L0658 |
| David J Cluley | East Greenwich, RI | — | Designer (Class III) | D3085 |
| David J Skurka | West Warwick, RI | — | Designer (Class I) | D1077 |
| David J Skurka | West Warwick, RI | — | Installer | L0615 |
| David J Zygiel Jr. | Portsmouth, RI | — | Designer (Class I) | D1267 |
| David J Zygiel Jr. | Portsmouth, RI | — | Installer | L1804 |
| David K Manoni | South Kingstown, RI | — | Designer (Class III) | D3132 |
| David K Manoni | South Kingstown, RI | — | Designer (Class IV Soil Evaluator) | D4086 |
| David Kalen | Wakefield, RI | — | Designer (Class IV Soil Evaluator) | D4052 |
| David Kehew | Portsmouth, RI | — | Installer | L0841 |
| David L Potter | Lincoln, RI | — | Designer (Class III) | D3120 |
| David L Sisson | Tiverton, RI | — | Installer | L1725 |
| David L Skaggs | Exeter, RI | — | Installer | L1829 |
| David L Towle | Cumberland, RI | — | Installer | L1910 |
| David M Rose | Kingston, RI | — | Installer | L0993 |
| David O'Keefe | Burriville, RI | — | Installer | L0569 |
| David P Coppola | South Kingstown, RI | — | Installer | L1601 |
| David Quintal | Tiverton, RI | — | Installer | L1954 |
| David W Fish | Wakefield, RI | — | Designer (Class III) | D3165 |
| Dean Antonelli | Johnston, RI | — | Installer | L1537 |
| Dean M Prendergast | Portsmouth, RI | — | Designer (Class I) | D1223 |
| Dean M Prendergast | Portsmouth, RI | — | Installer | L1405 |
| Deborah L Bosworth | Warwick, RI | — | Designer (Class IV Soil Evaluator) | D4032 |
| Deborah L Sherman-Quigley | Wakefield, RI | — | Installer | L0788 |
| Debra Zarrella | Exeter, RI | — | Installer | L1284 |
| Demetno P Costa | New Bedford, MA | — | Installer | L1649 |
| Dennis J Diffley Jr. | Warwick, RI | — | Installer | L1327 |
| Dennis W Wood | North Scituate, RI | — | Installer | L1637 |
| Derek Andrade | Tiverton, RI | — | Installer | L2033 |
| Diffley And Daughters | West Greenwich, RI | — | Septage Hauler | 836 |
| Donald A Roberts | Coventry, RI | — | Installer | L1869 |
| Donald F Spencer | Westerly, RI | — | Installer | L0918 |
| Donald G Gordon | Narraganseet, RI | — | Installer | L1019 |
| Donald Gliottone | North Providence, RI | — | Designer (Class I) | D1280 |
| Donald Gliottone | North Providence, RI | — | Installer | L0566 |
| Donald J Medeiros | Little Compton, RI | — | Designer (Class III) | D3140 |
| Donald J Medeiros | Little Compton, RI | — | Designer (Class IV Soil Evaluator) | D4035 |
| Donald J St.Ours | Dighton, MA | — | Installer | L1517 |
| Donald L Knox | Foster, RI | — | Installer | L0013 |
| Donald P Berndt | Attleboro,, MA | — | Installer | L0684 |
| Douglas J Allam Jr. | Warwick, RI | — | Designer (Class III) | D3152 |
| Duane C Boucher | Woonsocket, RI | — | Installer | L1849 |
| ECHO Septic Svs. LLC | Chepachet, RI | — | Septage Hauler | 912 |
| Edward A McQuaide | Charlestown, RI | — | Installer | L1926 |
| Edward N Simone | Foster, RI | — | Installer | L1109 |
| Edward Phillips | Westport, MA | — | Installer | L1341 |
| Edward T Lopes Jr. | Portsmouth, RI | — | Designer (Class III) | D3134 |
| Edward T Lopes Jr. | Portsmouth, RI | — | Installer | L0927 |
| Edwin W Davis | Broad Brook, CT | — | Installer | L1932 |
| Emelio DiLibero Jr. | Woonsocket, RI | — | Installer | L0619 |
| Eric C Raposa | Portsmouth, RI | — | Installer | L1907 |
| Eric D Colburn | Foster, RI | — | Designer (Class II) | D2052 |
| Eric M DeNardo | Pawtucket Inc, RI | — | Designer (Class III) | D3156 |
| Eric M Prive | Inc. Cranston, RI | — | Designer (Class III) | D3117 |
| Ethan P DaPonte | Bristol, RI | — | Installer | L1876 |
| Eugene F Spring | Wakefield, RI | — | Designer (Class III) | D3026 |
| Eugene T Edwards Jr | Stamford, CT | — | Installer | L1514 |
| Evan L Dubuc | Attleboro, MA | — | Installer | L1888 |
| Fat Piu Lee | Sandwich, MA | — | Designer (Class III) | D3136 |
| Fernando D Gomes | Warwick, RI | — | Installer | L1398 |
| Fernando Sarmento | Coventry, RI | — | Installer | L1235 |
| Fletcher E Ferreira | Portsmouth, RI | — | Installer | L1963 |
| Francesco Cassisi | Johnston, RI | — | Installer | L1313 |
| Francis X Flynn | Charlestown, RI | — | Installer | L0672 |
| Frank A Turrisi | Pawcatuck, CT | — | Installer | L0790 |
| Frank B Riccio | North Scituate, RI | — | Installer | L1630 |
| Frank Gaglione | Johnston, RI | — | Installer | L0898 |
| Frank H Dimartino | West Greenwich, RI | — | Installer | L1759 |
| Frank J Martinelli | Scituate Drive, RI | — | Installer | L1593 |
| Frank N Passarella | North Kingstown, RI | — | Installer | L1641 |
| Frank Simonelli | Greenville, RI | — | Installer | L0003 |
| Friendly Septic Cleaning Llc | Warwick, RI | — | Septage Hauler | 939 |
| Gary C Lamond | North Kingstown, RI | — | Designer (Class III) | D3075 |
| Gary E Brayman | Hope Valley, RI | — | Installer | L1422 |
| Gary G Tikoian | Smithfield, RI | — | Installer | L0693 |
| Gary Studley | West Greenwich, RI | — | Installer | L0467 |
| Gashtasb D Dowlatshahi | Cranston, RI | — | Installer | L1088 |
| Gene A Hall | — | — | Installer | L1092 |
| Geoffrey N Bouchard | Wakefield, RI | — | Installer | L1891 |
| George Calcagni | Johnston, RI | — | Installer | L0048 |
| George G Palmisciano | Lincoln, RI | — | Designer (Class III) | D3036 |
| George M Barkan | Foster, RI | — | Installer | L1651 |
| George O Steere Jr. | Chepachet, RI | — | Installer | L0485 |
| George O Tashjian | Johnston, RI | — | Installer | L1236 |
| George Simone | Sterling, CT | — | Installer | L1287 |
| George W Carpenter | Harrisville, RI | — | Installer | L1390 |
| George W Kellum | Rehoboth, MA | — | Installer | L1840 |
| Gerald Del Signore | Glocester, RI | — | Installer | L0913 |
| Gerald P Zarrella | Exeter, RI | — | Installer | L1285 |
| Geralyn E Small | Middletown Inc, RI | — | Designer (Class III) | D3089 |
| Gino A Mazzenga | Hope, RI | — | Installer | L1620 |
| Glen T Skurka | Coventry, RI | — | Designer (Class I) | D1159 |
| Glen T Skurka | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4056 |
| Glen T Skurka | Coventry, RI | — | Installer | L1440 |
| Glenn D Pontes | Dartmouth, MA | — | Installer | L1768 |
| Glenn H Gough Jr. | West Kingston, RI | — | Installer | L1138 |
| Glenn R Goguen | Charlestown, RI | — | Installer | L1482 |
| Gordon E Rogers | Foster, RI | — | Installer | L1678 |
| Grant E Simpson | Seekonk, MA | — | Designer (Class III) | D3150 |
| Gregory A Avenia | Providence Solutions, Inc., RI | — | Designer (Class III) | D3118 |
| Gregory A Nunes | Hope, RI | — | Installer | L1752 |
| Gregory B Soscia | Greene, RI | — | Installer | L1727 |
| Gregory D LaCroix | Lincoln, RI | — | Designer (Class IV Soil Evaluator) | D4103 |
| Gregory E Phillips | New Shoreham, RI | — | Installer | L1995 |
| Gregory F Desnoyers | North Kinstown, RI | — | Installer | L2031 |
| Gregory M Lach | Little Compton, RI | — | Installer | L1716 |
| Gregory P MacPherson | North Smithfield, RI | — | Installer | L1904 |
| Gregory R Coe | Middletown, RI | — | Installer | L1931 |
| Gregory S Anderson | Charlestown, RI | — | Installer | L2024 |
| H.i. Stone & Son Inc | Southbury, CT | — | Septage Hauler | 887 |
| Hallman Septic Serv Llc | Portsmouth, RI | — | Septage Hauler | 704 |
| Harry A Miller | East Greenwich, RI | — | Designer (Class II) | D2101 |
| Harry Cole | North Kingstown, RI | — | Installer | L0259 |
| Harry Hawker | Exeter, RI | — | Installer | L1658 |
| Harry J Woloohojian | Cranston, RI | — | Installer | L1239 |
| Haulin Oats | West Greenwich, RI | — | Septage Hauler | 942 |
| Henry DiLibero | West Warwick, RI | — | Installer | L0269 |
| Henry J Kulpa | Tiverton, RI | — | Installer | L1569 |
| Herbert G Dyer | West Kingston, RI | — | Installer | L0812 |
| Horace Lindo | Oakdale, CT | — | Installer | L1302 |
| Howard I Frederickson, | North Scituate, RI | — | Installer | L1091 |
| Howard I Frederickson, III | North Scituate, RI | — | Designer (Class I) | D1134 |
| Hugh B Webb | Warwick, RI | — | Designer (Class IV Soil Evaluator) | D4104 |
| Hugo Key | Wakefield, RI | — | Installer | L1884 |
| Ivan L Cindrich | West Kingston, RI | — | Installer | L1753 |
| J & K Sanitation | Warren, RI | — | Septage Hauler | 375 |
| J & M Transfer, Inc | Exeter, RI | — | Septage Hauler | 892 |
| J. Hockman, Inc. | Norfolk, MA | — | Septage Hauler | 953 |
| J&s Development Corp | Bradford, MA | — | Septage Hauler | 896 |
| Jack M Chapman | Uxbridge, MA | — | Installer | L2012 |
| James A Jackson Jr | Foxboro, MA | — | Designer (Class III) | D3163 |
| James A McQuaide | Charlestown, RI | — | Installer | L1953 |
| James Aragona | Richmond, RI | — | Installer | L1354 |
| James B King | Narragansett, RI | — | Installer | L1984 |
| James B Taglione | Smithfield, RI | — | Installer | L0604 |
| James Bento | Swansea, MA | — | Installer | L1370 |
| James Briggs III | Saunderstown Inc., RI | — | Designer (Class I) | D1216 |
| James Briggs III | Inc. Saunderstown, RI | — | Installer | L1545 |
| James C McKee | Cumberland, RI | — | Installer | L1937 |
| James C Whitley | Pawtucket, RI | — | Installer | L1911 |
| James C Wilcox | South LLC Kingston, RI | — | Designer (Class I) | D1278 |
| James C Wilcox | LLC South Kingston, RI | — | Installer | L1818 |
| James E Feeney, III | Warwick, RI | — | Installer | L1255 |
| James E Hall | Portsmouth, RI | — | Installer | L1187 |
| James F Marsh Jr. | West Warwick, RI | — | Designer (Class I) | D1031 |
| James F Marsh Jr. | West Warwick, RI | — | Installer | L1227 |
| James G Deslandes | Warwick, RI | — | Installer | L1958 |
| James G Flynn | Narragansett, RI | — | Designer (Class II) | D2028 |
| James G Furtado | Swansea, MA | — | Installer | L1481 |
| James H Woloohojian | Bridport, VT | — | Installer | L1238 |
| James J Haczynski | North Smithfield, RI | — | Installer | L2014 |
| James J Rocchio | Cranston, RI | — | Installer | L1510 |
| James J. Roderick, Inc. | Provincetown, MA | — | Septage Hauler | 1023 |
| James L Kesson | Porstmouth, RI | — | Installer | L1616 |
| James L Titus | West Greenwich, RI | — | Installer | L1067 |
| James Lanagan | Dartmouth, MA | — | Installer | L1859 |
| James M Dzwil | Charlestown, RI | — | Installer | L1461 |
| James P Manning | Narragansett, RI | — | Installer | L0711 |
| James Palumbo | Barrington, RI | — | Installer | L0134 |
| James Pelletier | Tiverton, RI | — | Installer | L1729 |
| James R Paiva | Foster, RI | — | Installer | L1661 |
| James T Caldarone | Wakefield, RI | — | Designer (Class II) | D2146 |
| James V Tusino | Douglas, MA | — | Installer | L0799 |
| Jamie B Sousa | Harrisville, RI | — | Installer | L2029 |
| Jared R Nunes | West Warwick, RI | — | Installer | L1576 |
| Jariah R Roderick | Attleboro, MA | — | Installer | L1925 |
| Jarrett A Zell | Providence, RI | — | Designer (Class III) | D3159 |
| Jason A McCutcheon | Harrisville, RI | — | Installer | L1794 |
| Jason M Catalano | Cumberland, RI | — | Installer | L2055 |
| Jason P Clough | Cranston, RI | — | Designer (Class III) | D3110 |
| Jason R Reis | Adamsville, RI | — | Installer | L1883 |
| Jay A Desilva | Scituate, RI | — | Installer | L1513 |
| Jean Z Lambert | Jamestown, RI | — | Designer (Class III) | D3054 |
| Jean Z Lambert | Jamestown, RI | — | Designer (Class IV Soil Evaluator) | D4068 |
| Jeff M Houle | Richmond, RI | — | Installer | L1457 |
| Jeffrey C Hanson | E- Warwick, RI | — | Designer (Class III) | D3015 |
| Jeffrey C Peterson | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4039 |
| Jeffrey E Umrysz | Mystic, RI | — | Installer | L1413 |
| Jeffrey J Campopiano | Saunderstown, RI | — | Designer (Class III) | D3072 |
| Jeffrey J Campopiano | Saunderstown, RI | — | Designer (Class IV Soil Evaluator) | D4057 |
| Jeffrey K Balch | Peacedale RI -, RI | — | Designer (Class II) | D2036 |
| Jeffrey P Lacerte | Westerly, RI | — | Installer | L1966 |
| Jeffrey S Davis | Narragansett, RI | — | Designer (Class III) | D3146 |
| Jeffrey T Castle | Providence, RI | — | Installer | L2054 |
| Jeffrey T Mossey | Exeter, RI | — | Installer | L1624 |
| Jeffrey W Simons Jr. | Dighton, MA | — | Installer | L1365 |
| Jennifer James | West Kingston, RI | — | Designer (Class IV Soil Evaluator) | D4081 |
| Jesse Helger | Tiverton, RI | — | Installer | L1857 |
| Jesse J Mackin | Griswold, CT | — | Installer | L1225 |
| Jesse W Siligato | Narragansett, RI | — | Installer | L1993 |
| Joel W Camara | Tiverton, RI | — | Installer | L1176 |
| John A Martelly | Swansea, MA | — | Installer | L1572 |
| John A Mignanelli | Cranston, RI | — | Installer | L1862 |
| John A Tzitzouris | North Providence, RI | — | Designer (Class II) | D2066 |
| John A Tzitzouris | North Providence, RI | — | Designer (Class IV Soil Evaluator) | D4021 |
| John Braga Jr. | Portsmouth, RI | — | Designer (Class III) | D3063 |
| John C D'Amato | Stoninton, CT | — | Installer | L1209 |
| John D Timpson | Wakefield, RI | — | Designer (Class I) | D1079 |
| John D Timpson | Wakefield, RI | — | Installer | L1280 |
| John DeLuca | Woodstock, CT | — | Installer | L0771 |
| John Dimon | Charlestown, RI | — | Designer (Class I) | D1214 |
| John Dimon | Charlestown, RI | — | Installer | L1609 |
| John E Rockwell | Coventry, RI | — | Designer (Class II) | D2089 |
| John E Stedman | South Kingstown, RI | — | Installer | L0665 |
| John E Stedman Jr | South Kingstown, RI | — | Installer | L1506 |
| John F Drago | Pawcatuck, CT | — | Installer | L1980 |
| John Fogarty | Smithfield, RI | — | Installer | L0521 |
| John H Gallagher | Burrillville, RI | — | Installer | L1563 |
| John H Marks | Tiverton, RI | — | Installer | L1813 |
| John H O'Keefe | Pawcatuck, CT | — | Installer | L1692 |
| John H Tillinghast | Chepachet, RI | — | Installer | L0463 |
| John J Marietti Jr | Hope, RI | — | Installer | L1935 |
| John L Rainha | Cumberland, RI | — | Installer | L1940 |
| John Lawless Jr. | Jamestown, RI | — | Designer (Class III) | D3017 |
| John M Lannan | Bristol, RI | — | Installer | L1194 |
| John M Perri | Warwick, RI | — | Installer | L1756 |
| John M Ruzzo | Coventry, RI | — | Installer | L1596 |
| John Miozzi Jr. | Narragansett, RI | — | Installer | L0491 |
| John P DeAngelis | Barrington, RI | — | Installer | L1653 |
| John P Hatch Jr | Willington, CT | — | Installer | L1998 |
| John P Hatch Sr | Colchester, CT | — | Installer | L1999 |
| John P Matthews | Portsmouth, RI | — | Installer | L2022 |
| John P Moore | Ledyard, CT | — | Installer | L1451 |
| John R D'Angelo | Smithfield, RI | — | Installer | L1428 |
| John R Mello Jr. | Inc. Middletown, RI | — | Designer (Class III) | D3065 |
| John R Mello Jr. | Middletown, RI | — | Installer | L1265 |
| John R Papa | Warwick, RI | — | Designer (Class I) | D1081 |
| John R Papa | Warwick, RI | — | Installer | L1161 |
| John R Soares | Swansea, MA | — | Installer | L1113 |
| John Ruzzo | Coventry, RI | — | Installer | L0151 |
| John T Dagostino | Wakefield, RI | — | Installer | L1947 |
| John T Kirby | Warwick, RI | — | Installer | L1191 |
| Jon C Ibbotson | Little Compton, RI | — | Installer | L0567 |
| Jon K Vernava | Warwick, RI | — | Designer (Class IV Soil Evaluator) | D4011 |
| Jonathan A Brown | Portsmouth, RI | — | Installer | L1945 |
| Jonathan Davis | Portsmouth, NH | — | Installer | L1852 |
| Jonathan M Olivier | North Kingstown, RI | — | Installer | L2043 |
| Jonathan T Nordin | Harrisville, RI | — | Installer | L1997 |
| Joseph A Casali | Warwick, RI | — | Designer (Class III) | D3135 |
| Joseph A Corso | Cranston, RI | — | Installer | L2058 |
| Joseph C Procopio | East Greenwich, RI | — | Designer (Class I) | D1286 |
| Joseph C Procopio | East Greenwich, RI | — | Installer | L1681 |
| Joseph D Baldini | North Scituate, RI | — | Installer | L1052 |
| Joseph E Henderson | Sandwich, MA | — | Designer (Class IV Soil Evaluator) | D4090 |
| Joseph F Medeiros | Middletown, RI | — | Installer | L1574 |
| Joseph Farias Jr. | Tiverton, RI | — | Installer | L0110 |
| Joseph L Weed | Lincoln, RI | — | Designer (Class III) | D3145 |
| Joseph M Joyal | Coventry, RI | — | Installer | L1967 |
| Joseph Madonna | Cranston, RI | — | Installer | L0024 |
| Joseph P Toscano Jr. | Westerly, RI | — | Designer (Class II) | D2018 |
| Joseph P Toscano Jr. | Westerly, RI | — | Installer | L0543 |
| Joseph R Pelosi | Cranston, RI | — | Installer | L1974 |
| Joseph S Carlson | Rehoboth, MA | — | Installer | L1892 |
| Joseph Soares Jr. | Hope Valley, RI | — | Installer | L0597 |
| Joseph W Malo | Portsmouth, RI | — | Designer (Class III) | D3124 |
| Josh T Angell | Scituate, RI | — | Designer (Class I) | D1244 |
| Josh T Angell | Scituate, RI | — | Installer | L1592 |
| Joshua A Hall | Chepachet, RI | — | Designer (Class I) | D1315 |
| Joshua A Hall | Chepachet, RI | — | Installer | L2011 |
| Joshua A Rosen | Wakefield, RI | — | Designer (Class III) | D3099 |
| Joshua D Antonucci | Johnston, RI | — | Installer | L2007 |
| Joshua E Lebreux | Westport, MA | — | Installer | L1877 |
| Joshua G Luther | Grisword, CT | — | Installer | L1903 |
| Joshua G Swerling | Southborough, MA | — | Designer (Class III) | D3141 |
| Joshua H Trotta | Warwick, RI | — | Installer | L2015 |
| Joshua L Feliciano | Portsmouth, MA | — | Installer | L2021 |
| Joshua M Sylvain | Foster, RI | — | Installer | L1979 |
| Joshua Orlandi | Warwick, RI | — | Installer | L1499 |
| Jp Noonan Trans Inc | West Bridgewater, MA | — | Septage Hauler | 703 |
| Justin J Wakim | Smithfield, RI | — | Installer | L2005 |
| Justin M Wilbur | Providence, RI | — | Installer | L1970 |
| Justin P St. Laurent | Tiverton RI 401- 640-5334, RI | — | Designer (Class I) | D1246 |
| Justin P St. Laurent | Tiverton, RI | — | Installer | L1665 |
| Justin Parrillo | North Scituate, RI | — | Installer | L0688 |
| Kamal R Hingorany | Portsmouth, RI | — | Designer (Class III) | D3051 |
| Kamal R Hingorany | Portsmouth, RI | — | Designer (Class IV Soil Evaluator) | D4005 |
| Karl J Russo | North Scituate, RI | — | Installer | L0939 |
| Karop Dirazonian | Burrillville, RI | — | Installer | L1949 |
| Kathleen P Mangan | Jackson, NH | — | Designer (Class IV Soil Evaluator) | D4025 |
| Kegan P Labonte | Smithfield, RI | — | Installer | L1934 |
| Keith Compart | Warwick, RI | — | Installer | L1504 |
| Keith J Hickey | Swansea, MA | — | Installer | L1933 |
| Kenneth Adler | Greenville, RI | — | Installer | L0520 |
| Kenneth Chapdelaine | Coventry, RI | — | Installer | L0643 |
| Kenneth G Terranova | Peacedale, RI | — | Installer | L1523 |
| Kenneth J Foley | Rehoboth, MA | — | Installer | L0687 |
| Kenneth Laing | Bradford, RI | — | Installer | L1918 |
| Kenneth M Gladding | Jamestown, RI | — | Installer | L1215 |
| Kenneth R Boyer | Hope Valley, RI | — | Installer | L0600 |
| Kenneth R Cole Jr | Ormond Beach, FL | — | Designer (Class IV Soil Evaluator) | D4038 |
| Kenneth R Cole Jr | Ormond Beach, FL | — | Installer | L1474 |
| Kevin Almeida | Rehoboth, MA | — | Installer | L1834 |
| Kevin C Morin | Cranston, RI | — | Designer (Class III) | D3053 |
| Kevin Fetzer | East Greenwich, RI | — | Designer (Class IV Soil Evaluator) | D4029 |
| Kevin Francis | Bristol, RI | — | Installer | L1056 |
| Kevin Guarreillo | Peacedale, RI | — | Installer | L0674 |
| Kevin J DeMers | Inc Cranston, RI | — | Designer (Class III) | D3096 |
| Kevin J Robishaw Jr | Exeter, RI | — | Installer | L1973 |
| Kevin L Theroux | West Greenwich, RI | — | Installer | L0782 |
| Kevin M Bartlett | Chepachet, RI | — | Designer (Class III) | D3073 |
| Kevin M Kilduff | Charlestown, RI | — | Installer | L1687 |
| Kevin M Wilkie | Little Compton, RI | — | Installer | L1636 |
| Kevin P Hoyt | Block Island, RI | — | Designer (Class I) | D1185 |
| Kevin P Hoyt | Block Island, RI | — | Designer (Class IV Soil Evaluator) | D4084 |
| Kevin R Armstrong | Exeter, RI | — | Installer | L0822 |
| Kevin R Gardner | Ashaway, RI | — | Installer | L2019 |
| Kevin R Harrop | Rumford RI ext 240, RI | — | Designer (Class III) | D3155 |
| Kevin R Olenik | Mystic, CT | — | Installer | L2048 |
| Kevin Wilbur | Providence, RI | — | Installer | L0838 |
| Kim E Litchfield | Tiverton, RI | — | Installer | L1571 |
| Kristen Hemphill | Charlestown, RI | — | Installer | L2044 |
| Kurt S Poulton | Tiverton, RI | — | Installer | L0785 |
| Kyle R McCombs | Harrisville, RI | — | Installer | L2002 |
| Kyle S Markhart | West Greenwich, RI | — | Installer | L1717 |
| Land Works LLC DBA Proseptic | East Greenwich, RI | — | Septage Hauler | 951 |
| Larry Torti | Harmony, RI | — | Installer | L1909 |
| Lawrence A Aubin Jr. | East Providence, RI | — | Installer | L1317 |
| Lawrence G Desormier | Chepachet, RI | — | Installer | L1325 |
| Lee W Duffin | North Kingstown, RI | — | Designer (Class I) | D1112 |
| Lee W Duffin | North Kingstown, RI | — | Installer | L1254 |
| Legacy Pumping Inc | Plymouth, MA | — | Septage Hauler | 1007 |
| Leon J Sylvia | Tiverton, RI | — | Installer | L1508 |
| Leonard F Potter | Westport, MA | — | Installer | L0337 |
| Leonard R Bradley Jr. | Inc. Cranston, RI | — | Designer (Class III) | D3042 |
| Lewell P Andrews Jr. | Carolina, RI | — | Installer | L0995 |
| Linda M Stedman | South Kingstown, RI | — | Designer (Class I) | D1065 |
| Linda M Stedman | South Kingstown, RI | — | Installer | L0698 |
| Love Sanitation | Swansea, MA | — | Septage Hauler | 834 |
| Lucas D D'Allesandro | Foster, RI | — | Installer | L1554 |
| Luigi A Marietti Jr. | Hope, RI | — | Installer | L1822 |
| Luigi Crispino | North Scituate, RI | — | Installer | L1452 |
| Macamaux Septic | Wyoming, RI | — | Septage Hauler | 901 |
| Manuel Alexandre | Westport, MA | — | Installer | L1243 |
| Marc Desrosiers | Coventry, RI | — | Installer | L1941 |
| Marc F Weller | Providence, RI | — | Designer (Class III) | D3129 |
| Marc N Nyberg | North Smithfield, RI | — | Designer (Class II) | D2033 |
| Marc N Nyberg | North Smithfield, RI | — | Designer (Class IV Soil Evaluator) | D4043 |
| Marcus Channell | Warwick, RI | — | Designer (Class II) | D2109 |
| Marianne I Diffin | Inc. Cranston, RI | — | Designer (Class IV Soil Evaluator) | D4093 |
| Mark A DeMello | Portsmouth, RI | — | Installer | L1607 |
| Mark A Rodrigues | Fall River, MA | — | Designer (Class III) | D3133 |
| Mark Brayman | Exeter, RI | — | Installer | L1344 |
| Mark D Boyer | West Warwick, RI | — | Designer (Class II) | D2027 |
| Mark F Pike | Warwick, RI | — | Installer | L1272 |
| Mark H Robar | Richmond, RI | — | Installer | L1582 |
| Mark J Meyers | Oakdale, CT | — | Installer | L1936 |
| Mark L Dowdell | Charlestown, RI | — | Designer (Class III) | D3142 |
| Mark M Dutilly | Greene, RI | — | Installer | L1395 |
| Mark N Ready | Charlestown, RI | — | Installer | L1721 |
| Mark P Mariano | Seekonk, MA | — | Designer (Class III) | D3166 |
| Maryellen Chaffin | Toilets Portsmouth, RI | — | Installer | L2052 |
| Masoud Shakoori | Wyoming, RI | — | Installer | L1381 |
| Mathew J Callahan | West Greenwich, RI | — | Designer (Class I) | D1295 |
| Mathew J Callahan | West Greenwich, RI | — | Installer | L1930 |
| Mathew J Dowling | Charlestown, RI | — | Designer (Class I) | D1269 |
| Mathew J Dowling | Charlestown, RI | — | Designer (Class IV Soil Evaluator) | D4088 |
| Mathew J Dowling | Charlestown, RI | — | Installer | L1805 |
| Mathew N Osborne | Blackstone, MA | — | Designer (Class I) | D1296 |
| Mathew N Osborne | Blackstone, MA | — | Installer | L1881 |
| Matthew A DeJesus | Johnston, RI | — | Installer | L2034 |
| Matthew A Yanuskiewicz | Pawtucket, RI | — | Designer (Class III) | D3164 |
| Matthew B Schartner | North Kingstown, RI | — | Installer | L1634 |
| Matthew E Clukies | Portsmouth, RI | — | Installer | L1521 |
| Matthew E Hackman | Warwick Inc., RI | — | Designer (Class III) | D3061 |
| Matthew J Cotta | Exeter, RI | — | Designer (Class II) | D2117 |
| Matthew J Cotta | Exeter, RI | — | Designer (Class IV Soil Evaluator) | D4044 |
| Matthew J Viana | Warwick, RI | — | Designer (Class III) | D3151 |
| Matthew P Mello | Tiverton, RI | — | Installer | L1960 |
| Matthew R Olson | Portsmouth, RI | — | Installer | L0642 |
| Mcvac Environmental | New Haven, CT | — | Septage Hauler | 678 |
| Melaney L Collins | Westerly, RI | — | Installer | L1968 |
| Michael A DelRossi | Charlestown, RI | — | Designer (Class III) | D3038 |
| Michael A Dillon | Cumberland, RI | — | Installer | L1948 |
| Michael A Dobridnia | Pawtucket, RI | — | Installer | L1182 |
| Michael A Fontaine | South Kingstown, RI | — | Designer (Class II) | D2139 |
| Michael A James | Tiverton, RI | — | Designer (Class III) | D3112 |
| Michael A Morrone | Westely, RI | — | Installer | L1376 |
| Michael A Netro | Inc North Kingstown, RI | — | Installer | L1362 |
| Michael Biszko | Fall River, MA | — | Installer | L1874 |
| Michael C Gray | Chepachet, RI | — | Designer (Class III) | D3148 |
| Michael C Houle | North Scituate, RI | — | Installer | L1713 |
| Michael Costa | Seekonk, MA | — | Installer | L1914 |
| Michael D Cesaro | North Kingstown, RI | — | Installer | L1002 |
| Michael D D'Ambra | Warwick, RI | — | Installer | L1210 |
| Michael D Ernst | Block Island, RI | — | Installer | L1498 |
| Michael DaPonte | Bristol, RI | — | Installer | L0866 |
| Michael E Galligan | Rehoboth, MA | — | Installer | L1761 |
| Michael E Russell | & Consulting, Portsmouth LLC, RI | — | Designer (Class III) | D3106 |
| Michael F Campopiano | Bristol, RI | — | Installer | L0424 |
| Michael F Corcoran | Bradford, CT | — | Installer | L2056 |
| Michael F DePrete | Coventry, RI | — | Installer | L1699 |
| Michael Fonseca | Bristol, RI | — | Installer | L0981 |
| Michael Gadrow | North Kingstown, RI | — | Installer | L0497 |
| Michael H Berek | West Greenwich, RI | — | Designer (Class I) | D1313 |
| Michael H Berek | West Greenwich, RI | — | Installer | L1928 |
| Michael J Interlini Jr. | Johnston, RI | — | Installer | L1899 |
| Michael J Martino | Cranston, RI | — | Installer | L1842 |
| Michael J McCormick | East Greenwich, RI | — | Designer (Class II) | D2100 |
| Michael J Narcisi | Concord, MA | — | Designer (Class IV Soil Evaluator) | D4080 |
| Michael J Wilkinson | Providence, RI | — | Designer (Class III) | D3154 |
| Michael L Simmons | — | — | Installer | L2050 |
| Michael L Sliney | Exeter, RI | — | Designer (Class I) | D1047 |
| Michael L Sliney | Exeter, RI | — | Installer | L1111 |
| Michael Laflamme | Saunderstown, RI | — | Installer | L1026 |
| Michael Langford | Cranston, RI | — | Designer (Class I) | D1150 |
| Michael Langford | Cranston, RI | — | Installer | L1193 |
| Michael M Harbour | Coventry, RI | — | Designer (Class I) | D1289 |
| Michael M Harbour | Coventry, RI | — | Installer | L1856 |
| Michael Netro A | North Inc Kingstown, RI | — | Designer (Class I) | D1291 |
| Michael P Fox | Warwick, RI | — | Installer | L1511 |
| Michael Perri & Sons Inc | Warwick, RI | — | Septage Hauler | 780 |
| Michael R Darveau | Inc. Cumberland, RI | — | Designer (Class II) | D2116 |
| Michael R Masson | Wakefield, RI | — | Installer | L0718 |
| Michael R Tougas | North Kingstown, RI | — | Installer | L1956 |
| Michael S Faria | Seekonk MA ext.307, RI | — | Designer (Class III) | D3107 |
| Michael S Faria | Seekonk, MA | — | Designer (Class IV Soil Evaluator) | D4085 |
| Michael T Atkinson | — | — | Installer | L1701 |
| Michael T Brosseau | Bradford, RI | — | Installer | L2047 |
| Michael T Saccoccia | Coventry LLC, RI | — | Designer (Class I) | D1268 |
| Michael T Saccoccia | LLC Coventry, RI | — | Installer | L1531 |
| Michael Thatcher | Cranston, RI | — | Installer | L0699 |
| Michael W Susi | Johnston, RI | — | Installer | L0986 |
| Micheal Esposito | Harrisville, RI | — | Installer | L1855 |
| Mohamed H Hussein | — | — | Designer (Class III) | D3158 |
| Monique Towle | Cumberland, RI | — | Designer (Class I) | D1281 |
| Monique Towle | Cumberland, RI | — | Installer | L1831 |
| Morris Maglioli | Johnston, RI | — | Installer | L1431 |
| Nathan S Fields | North Scituate, RI | — | Installer | L2001 |
| New London County Septic Service, Inc. | Ledyard, CT | — | Septage Hauler | 1018 |
| Nicholas A Mattiello Jr | Cranston, RI | — | Designer (Class III) | D3168 |
| Nicholas D Laudati | Narragansett, RI | — | Installer | L1992 |
| Nicholas J Piampiano | Scituate, RI | — | Designer (Class III) | D3059 |
| Nicholas J Piampiano | Scituate, RI | — | Designer (Class IV Soil Evaluator) | D4079 |
| Nicholas M Pauling | Inc. Ayer, MA | — | Designer (Class II) | D2132 |
| Nicholas Veltri | Narragansett, RI | — | Designer (Class II) | D2019 |
| Nicholas Veltri | Narragansett, RI | — | Designer (Class IV Soil Evaluator) | D4023 |
| Nicholas W Capezza | Cranston, RI | — | Designer (Class III) | D3004 |
| Nichols Polseno | Scituate, RI | — | Installer | L1924 |
| Nicole L Letendre | Swansea, MA | — | Designer (Class IV Soil Evaluator) | D4019 |
| Nicole Reilly | Inc. Cranston, RI | — | Designer (Class II) | D2120 |
| Nikki C Gladding | Jamestown, RI | — | Designer (Class III) | D3121 |
| Norman Chapdelaine | Coventry, RI | — | Installer | L0025 |
| Ocean State Cesspool | West Kingston, RI | — | Septage Hauler | 814 |
| Oren A Banks | Portsmouth, RI | — | Installer | L1994 |
| Oscar B Chapman | Westerly, RI | — | Installer | L0180 |
| Patricia A Kelly | Tiverton, RI | — | Designer (Class II) | D2106 |
| Patricia A Kelly | Tiverton, RI | — | Designer (Class IV Soil Evaluator) | D4047 |
| Patricia K Walker | West Greenwich, RI | — | Designer (Class III) | D3048 |
| Patrick A Czerwien | Cranston, RI | — | Installer | L1605 |
| Patrick D Masson | Wakefield, RI | — | Installer | L1619 |
| Patrick Geddes | Providence, RI | — | Installer | L2036 |
| Patrick J Aubin | Warren, RI | — | Installer | L0647 |
| Patrick J Freeman | Exeter, RI | — | Designer (Class III) | D3138 |
| Patrick S Diffley | West Greenwich, RI | — | Installer | L1558 |
| Patriot Services | Bridgewater, MA | — | Septage Hauler | 928 |
| Paul A Ludovici | Johnson, RI | — | Installer | L1686 |
| Paul A Medeiros | Seekonk, MA | — | Installer | L1334 |
| Paul D Carlson | North Smithfield, RI | — | Designer (Class III) | D3147 |
| Paul D LeBlanc | Westerly, RI | — | Designer (Class III) | D3050 |
| Paul E Desrosiers | Tiverton, RI | — | Designer (Class I) | D1010 |
| Paul E Desrosiers | Tiverton, RI | — | Installer | L1326 |
| Paul L Detonnancourt | Harrisville, RI | — | Installer | L1423 |
| Paul O Filippi | Block Island, RI | — | Installer | L1480 |
| Paul R Mumford | Saunderstown, RI | — | Installer | L0601 |
| Paul R Mumford & Son Cesspool | Saunderstown, RI | — | Septage Hauler | 334 |
| Paul R Mumford Jr. | Saunderstown, RI | — | Designer (Class I) | D1161 |
| Paul R Mumford Jr. | Saunderstown, RI | — | Installer | L1458 |
| Paul Surabian | Smithfield, RI | — | Installer | L0584 |
| Pee Palace Potty, LLC | North Attleboro, MA | — | Septage Hauler | 981 |
| Peter A Gervasio | North Scituate, RI | — | Designer (Class I) | D1123 |
| Peter A Gervasio | North Scituate, RI | — | Installer | L0854 |
| Peter A Ialongo | Cranston, RI | — | Installer | L1790 |
| Peter A King | Clayville, RI | — | Installer | L1077 |
| Peter Calcagni | Cumberland, RI | — | Installer | L0444 |
| Peter DeTerra | Fairhaven, MA | — | Installer | L1129 |
| Peter J O'Rourke | Wakefield, RI | — | Designer (Class IV Soil Evaluator) | D4097 |
| Peter J Sacco Jr. | Westerly, RI | — | Installer | L1456 |
| Peter J Sacco Sr. | Westerly, RI | — | Designer (Class I) | D1111 |
| Peter J Sacco Sr. | Westerly, RI | — | Installer | L0062 |
| Peter M Fusaro | Westerly, RI | — | Installer | L1736 |
| Peter T Abbenante Jr. | North Kingstown, RI | — | Installer | L1943 |
| Peter W Brennan | Portsmouth, RI | — | Designer (Class I) | D1127 |
| Peter W Brennan | Portsmouth, RI | — | Installer | L0941 |
| Peter W Lachapelle | Tiverton, RI | — | Installer | L1821 |
| Philip A DeBartolo | Westerly, RI | — | Installer | L1894 |
| Philip J Pucino | Saunderstown, RI | — | Installer | L1938 |
| Philip T Mitchel | Ivoryton, CT | — | Installer | L1986 |
| Pietrangelo DeGiacomo | Ashaway, RI | — | Installer | L1708 |
| Pjeter Dajti | INC Exeter, RI | — | Installer | L2027 |
| Podgurskicorp Corp | Canton, MA | — | Septage Hauler | 992 |
| Pro Drain Svs of Southern NE | Bradford, RI | — | Septage Hauler | 969 |
| Pure Flo, LLC | Middleboro, MA | — | Septage Hauler | 995 |
| R.W. Schofield & Sons | Cumberland, RI | — | Septage Hauler | 338 |
| Ralph D Bozzi | Providence, RI | — | Installer | L0326 |
| Randy Burt | Coventry, RI | — | Installer | L1779 |
| Randy L Quigley | Wakefield, RI | — | Installer | L1680 |
| Raymond E Johnson | Tiverton, RI | — | Installer | L1839 |
| Raymond L Plante Jr. | Coventry, RI | — | Designer (Class I) | D1039 |
| Raymond L Plante Jr. | Coventry, RI | — | Installer | L0653 |
| Raymond Lavigne | Coventry, RI | — | Installer | L0944 |
| Raymond S Albanese Jr. | North Scituate, RI | — | Installer | L1420 |
| Rebecca L Crosby | Wyoming, RI | — | Installer | L1981 |
| RI Septic and Cesspool | North Scituate, RI | — | Septage Hauler | 1006 |
| Richard A Charpentier | Exeter, RI | — | Installer | L1987 |
| Richard A D'Amico | Rumford, RI | — | Installer | L1606 |
| Richard B Williams | Pascoag, RI | — | Installer | L1049 |
| Richard C LaBrecque | Cumberland, RI | — | Designer (Class I) | D1264 |
| Richard C LaBrecque | Cumberland, RI | — | Installer | L1762 |
| Richard D Delfino | North Kingstown, RI | — | Installer | L0741 |
| Richard D'Abate | Johnston, RI | — | Installer | L1294 |
| Richard Dubuc | So. Attleboro, MA | — | Installer | L0667 |
| Richard E Champlin III | Westerly, RI | — | Installer | L1754 |
| Richard F Rogers Jr. | Tiverton, RI | — | Designer (Class III) | D3033 |
| Richard F Rogers Jr. | Tiverton, RI | — | Designer (Class IV Soil Evaluator) | D4046 |
| Richard F Wolfe | Jamestown, RI | — | Designer (Class I) | D1308 |
| Richard F Wolfe | Jamestown, RI | — | Installer | L1972 |
| Richard G Brown | Hope, RI | — | Installer | L1912 |
| Richard G Clark | Wakefield, RI | — | Installer | L1355 |
| Richard G Gardner | Saunderstown, RI | — | Installer | L1622 |
| Richard J Bourbonnais, II | Saunderstown, RI | — | Designer (Class III) | D3115 |
| Richard J Marcello | Saunderstown, RI | — | Installer | L1303 |
| Richard L Pastore | North Kingstown, RI | — | Designer (Class III) | D3020 |
| Richard L Pastore | North Kingstown, RI | — | Designer (Class IV Soil Evaluator) | D4042 |
| Richard L Vaughn | Hope, RI | — | Designer (Class I) | D1058 |
| Richard L Vaughn | Hope, RI | — | Installer | L0956 |
| Richard M Alegria | Bristol, RI | — | Installer | L1705 |
| Richard M Lucia | Wakefield, RI | — | Designer (Class III) | D3090 |
| Richard M Seymour | Exeter, RI | — | Designer (Class I) | D1147 |
| Richard M Seymour | Exeter, RI | — | Installer | L1407 |
| Richard Pariseault | Saunderstown, RI | — | Installer | L1037 |
| Richard Plante | Coventry, RI | — | Designer (Class I) | D1305 |
| Richard Plante | Coventry, RI | — | Installer | L1977 |
| Richard R Chartier | Little Compton, RI | — | Installer | L1650 |
| Richard R Rodi | East Greenwich, RI | — | Installer | L1959 |
| Richard T Bzdyra | Cranston, RI | — | Designer (Class II) | D2034 |
| Richard W McGee | Little Compton, RI | — | Designer (Class I) | D1242 |
| Richard W McGee | Little Compton, RI | — | Installer | L1621 |
| Richard W Ringler | Charlestown, RI | — | Installer | L0606 |
| Richard White & Sons | No. Stonington, CT | — | Septage Hauler | 746 |
| Rick Nunes Construc | Hope, RI | — | Septage Hauler | 331 |
| Robert A Ferreira Jr. | Pawcatuck, CT | — | Installer | L1786 |
| Robert A Howard | North Kingstown, RI | — | Designer (Class I) | D1288 |
| Robert A Howard | North Kingstown, RI | — | Installer | L1838 |
| Robert A Studley Jr. | West Greenwich, RI | — | Installer | L0468 |
| Robert Brown Septic Svcs | Block Island, RI | — | Septage Hauler | 837 |
| Robert C Ray | Cumberland, RI | — | Designer (Class I) | D1260 |
| Robert C Ray | Cumberland, RI | — | Installer | L0461 |
| Robert C Schultz Jr | Exeter, RI | — | Designer (Class III) | D3104 |
| Robert Clift Jr. | Narragansett, RI | — | Designer (Class IV Soil Evaluator) | D4040 |
| Robert D Frost Jr. | Charlestown, RI | — | Designer (Class I) | D1236 |
| Robert D Frost Jr. | Charlestown, RI | — | Installer | L1694 |
| Robert E DeBlois Jr. | North Kingstown, RI | — | Installer | L1086 |
| Robert F Angilly Jr. | East Greenwich, RI | — | Designer (Class III) | D3047 |
| Robert F Long | New Bedford, MA | — | Installer | L1793 |
| Robert Franklin | Exeter, RI | — | Installer | L0191 |
| Robert G Johnson | Tiverton, RI | — | Designer (Class I) | D1206 |
| Robert G Johnson | Tiverton, RI | — | Installer | L1519 |
| Robert Geddes | Cumberland, RI | — | Installer | L0817 |
| Robert H Barber | Saunderstown, RI | — | Installer | L1419 |
| Robert J Baldwin | Lincoln, RI | — | Installer | L1319 |
| Robert J Broccolo | Bradford, RI | — | Installer | L1929 |
| Robert J Lake | Manville, RI | — | Installer | L1901 |
| Robert J Russo | Hope Valley, RI | — | Installer | L0576 |
| Robert J Smith | Warwick, RI | — | Designer (Class I) | D1290 |
| Robert J Smith | Warwick, RI | — | Installer | L1770 |
| Robert L Ferri | Exeter, RI | — | Installer | L1559 |
| Robert Lanni | Lincoln, RI | — | Installer | L0450 |
| Robert M Baglini Jr | North Dighton, MA | — | Designer (Class III) | D3122 |
| Robert M Garlick | Prudence, RI | — | Installer | L1566 |
| Robert M Lohr | Chepchet, RI | — | Installer | L1617 |
| Robert W Catenacci | Rehoboth, MA | — | Designer (Class I) | D1311 |
| Robert W Catenacci | Rehoboth, MA | — | Installer | L2013 |
| Robert W Costa | Seekonk, RI | — | Installer | L1809 |
| Robert W Kelliher | Assonet, MA | — | Installer | L1146 |
| Roderick T Nunes | Hope, RI | — | Designer (Class I) | D1128 |
| Roderick T Nunes | Hope, RI | — | Installer | L0682 |
| Roger F Chrissos | Hope Vally, RI | — | Installer | L1600 |
| Roger Ferrara | Cranston, RI | — | Installer | L0618 |
| Roland P Macomber | Coventry, RI | — | Designer (Class I) | D1272 |
| Roland P Macomber | Coventry, RI | — | Installer | L0731 |
| Ron T Blanchard | Bristol, RI | — | Designer (Class III) | D3066 |
| Ron T Blanchard | Bristol, RI | — | Designer (Class IV Soil Evaluator) | D4020 |
| Ronald Ballou | Chepachet, RI | — | Installer | L0469 |
| Ronald J Ansaldi | Johnston, RI | — | Installer | L1704 |
| Ronald J Parrillo II | Cranston, RI | — | Installer | L1107 |
| Ronald K Lewis | Warwick, RI | — | Installer | L1522 |
| Ronald K Plourd | Warwick, RI | — | Installer | L0928 |
| Ronald Moran | Warren, RI | — | Installer | L1764 |
| Ronald Morency | Exeter, RI | — | Designer (Class I) | D1183 |
| Ronald Morency | Exeter, RI | — | Installer | L1433 |
| Ronald Patalano | Exeter, RI | — | Installer | L0926 |
| Ronald R Pezzuco | Cranston, RI | — | Installer | L1682 |
| Ronald Rossi | Cranston, RI | — | Installer | L0614 |
| Ronald W Cataldo | Pawtucket, RI | — | Designer (Class III) | D3161 |
| Ronnie J Sposato | Ashaway, RI | — | Installer | L0814 |
| Rosano Davis Sanitary Pumping, Inc. | Cohassett, MA | — | Septage Hauler | 996 |
| Roy A Ferrell | Tiverton, RI | — | Installer | L1013 |
| Royal Porta Johns, LLC | North Easton, MA | — | Septage Hauler | 999 |
| Rpe Septic Services | Wood River Junction, RI | — | Septage Hauler | 534 |
| Russell A Ashworth | West Greenwich, RI | — | Installer | L1316 |
| Russell A Catanzaro | Warwick, RI | — | Installer | L1055 |
| Russell Boyle | Smithfield, RI | — | Installer | L0519 |
| Russell E Jones | Walpole, MA | — | Installer | L1714 |
| Russell P Cote | North Smithfield, RI | — | Installer | L2000 |
| Ryan A DaPonte | Providence, RI | — | Designer (Class III) | D3130 |
| Ryan A Ferrell | Tiverton, RI | — | Installer | L2032 |
| Ryan J Mitchel | Johnston, RI | — | Installer | L1920 |
| Ryan M Solitro | Chepachet, RI | — | Installer | L1983 |
| Sacco Enterprises Inc | Westerly, RI | — | Septage Hauler | 359 |
| Salvatore E Cherenzia IV | Pawcatuck, CT | — | Installer | L1780 |
| Samuel A White Jr. | Providence RI ext 231, RI | — | Designer (Class II) | D2020 |
| Samuel R Suorsa | Coventry, RI | — | Designer (Class II) | D2147 |
| Samuel R Suorsa | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4087 |
| Samuel S Hemenway | Providence, RI | — | Designer (Class III) | D3064 |
| Sarah J Pytko | North Smithfield, RI | — | Installer | L1801 |
| Scituate Cesspool Inc | Johnston, RI | — | Septage Hauler | 330 |
| Scituate Portable Restrooms, Inc. | Johnston, RI | — | Septage Hauler | 586 |
| Scot E Deledda | North Stonington, CT | — | Designer (Class III) | D3100 |
| Scot E Deledda | North Stonington, CT | — | Installer | L1751 |
| Scott D Hallman | Toilets Portsmouth, RI | — | Installer | L2053 |
| Scott F Moorehead | Coventry, RI | — | Designer (Class III) | D3018 |
| Scott F Moorehead | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4009 |
| Scott Grenon | Exeter, RI | — | Designer (Class I) | D1245 |
| Scott Grenon | Exeter, RI | — | Installer | L1614 |
| Scott M Davis | Bristol, RI | — | Installer | L1989 |
| Scott M O'Connor | Cumberland, RI | — | Designer (Class III) | D3113 |
| Scott M O'Connor | Cumberland, RI | — | Installer | L1797 |
| Scott P Rabideau | Harrisville, RI | — | Installer | L1379 |
| Scott R Ringland | Johnston, RI | — | Installer | L1494 |
| Scott S DaSilveira | Warren, RI | — | Installer | L1810 |
| Scott W Rylah | Pascoag, RI | — | Designer (Class I) | D1100 |
| Scott W Rylah | Pascoag, RI | — | Installer | L0990 |
| Scott W Zaroogian | Wakefield, RI | — | Installer | L1116 |
| Seamus M Moran | Mystic, CT | — | Designer (Class III) | D3167 |
| Sean M MacLeod | North Scituate, RI | — | Installer | L1466 |
| Sean P Condon | Chepachet, RI | — | Installer | L1781 |
| Sean P Grundy | North Kingstown, RI | — | Installer | L1435 |
| Seraphin DaPonte | Bristol, RI | — | Installer | L0837 |
| Sergio F Cherenzia | Westerly, RI | — | Designer (Class III) | D3111 |
| Shane P Driscoll | Lincoln, RI | — | Designer (Class III) | D3157 |
| Shane W Bettez | Hope, RI | — | Installer | L1848 |
| Shawn Pacheco | Dartmouth, MA | — | Installer | L1866 |
| Shon C Cuthill Jr | Exeter, RI | — | Installer | L1969 |
| Shoreline Sanitation | Westerly, RI | — | Septage Hauler | 680 |
| Simon P Olean | Portmouth, RI | — | Installer | L1923 |
| Soares Sanitation Pumping | Taunton, MA | — | Septage Hauler | 725 |
| Sophia D Narkiewicz | Greene, RI | — | Designer (Class III) | D3143 |
| Sophia D Narkiewicz | Greene, RI | — | Designer (Class IV Soil Evaluator) | D4082 |
| Stephan H Winsor | North Scituate, RI | — | Designer (Class I) | D1279 |
| Stephan H Winsor | North Scituate, RI | — | Installer | L1807 |
| Stephen A Cary | Warwick, RI | — | Installer | L1599 |
| Stephen A DeCastro | Portsmouth, RI | — | Installer | L1895 |
| Stephen F Wood | Riverside, RI | — | Installer | L1734 |
| Stephen F Wyatt | Portsmouth, RI | — | Designer (Class I) | D1113 |
| Stephen F Wyatt | Portsmouth, RI | — | Installer | L1368 |
| Stephen H Winsor | North Scituate, RI | — | Installer | L0433 |
| Stephen J Colucci | Glocester, RI | — | Installer | L1850 |
| Stephen J Oliveira | Tiverton, RI | — | Installer | L1378 |
| Stephen J Teixeira | Lincoln, RI | — | Installer | L1525 |
| Stephen L Matteson | Exeter, RI | — | Installer | L2059 |
| Stephen M Hooper | Plainville, MA | — | Installer | L1484 |
| Stephen Sherman | Wakefield, RI | — | Installer | L0899 |
| Steve Allen | North Kingstown, RI | — | Designer (Class I) | D1117 |
| Steve Allen | North Kingstown, RI | — | Installer | L0526 |
| Steven A Croteau | Tiverton, RI | — | Installer | L1875 |
| Steven D Gioiosa | Raynham, MA | — | Designer (Class II) | D2069 |
| Steven E Henry | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4026 |
| Steven F Breene | West Greenwich, RI | — | Installer | L1851 |
| Steven G Treml | Wakefield, RI | — | Installer | L1674 |
| Steven Gianlorenzo | East Providence, RI | — | Installer | L1260 |
| Steven J Richtarik | Lincoln, RI | — | Designer (Class III) | D3052 |
| Steven M Cabral | Warwick, RI | — | Designer (Class III) | D3003 |
| Steven M Pinch | Wakefield, RI | — | Designer (Class II) | D2014 |
| Steven R Hume | West Greenwich, RI | — | Installer | L2004 |
| Superior Septic Service | Saunderstown, RI | — | Septage Hauler | 709 |
| Susan B Capasso | Narragansett, RI | — | Designer (Class III) | D3087 |
| Susan B Capasso | Narragansett, RI | — | Designer (Class IV Soil Evaluator) | D4028 |
| Susan E Moberg | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4033 |
| Syl Pauley Jr. | Dayville, CT | — | Designer (Class III) | D3021 |
| Syl Pauley Jr. | Dayville, CT | — | Installer | L0554 |
| 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 |
| United Rentals. Dba Reliable Onsite Services | Denver, CO | — | Septage Hauler | 985 |
| United Site Services | Westborough, MA | — | Septage Hauler | 731 |
| Victor H Cipriano | Scituate, RI | — | Installer | L1003 |
| Village Septic Service, LLC | Westport, MA | — | Septage Hauler | 955 |
| Vincent A Cleri | Johnston, RI | — | Installer | L0906 |
| Vincent D Parillo | Johnston, RI | — | Installer | L2035 |
| Vincent E Lepore Jr. | Chepachet, RI | — | Installer | L1147 |
| Vincent Francis | Bristol, RI | — | Installer | L0205 |
| Vincent J DiMeglio | Cranston, RI | — | Installer | L1896 |
| Vincent Lepore III | Chepachet, RI | — | Designer (Class I) | D1285 |
| Vincent Lepore III | Chepachet, RI | — | Installer | L1841 |
| Wallace S Lewis | Pawcatuck, CT | — | Installer | L1487 |
| Waste Away Septic Service | Exeter, RI | — | Septage Hauler | 788 |
| Wayne J Hawkins | Sterling, CT | — | Designer (Class I) | D1144 |
| Wayne J Hawkins | Sterling, CT | — | Installer | L1299 |
| Westerly Sanitation | Westerly, RI | — | Septage Hauler | 573 |
| Western Oil, Inc. | Lincoln, RI | — | Septage Hauler | 326 |
| William A Clarke | Charlestown, RI | — | Installer | L1357 |
| William A Coulter | Wood River Jct, RI | — | Installer | L1126 |
| William B McMahon | N.Harwich, MA | — | Installer | L1863 |
| William B Rose | Block Island, RI | — | Installer | L1406 |
| William Baldwin | Johnston, RI | — | Installer | L0598 |
| William Clarke A | Charlestown, RI | — | Designer (Class I) | D1110 |
| William D Dowdell | Charlestown, RI | — | Designer (Class III) | D3010 |
| William E Frederickson | North Scituate, RI | — | Installer | L1562 |
| William E Ronci | North Kingstown, RI | — | Installer | L1583 |
| William F Smith | Little Compton, RI | — | Designer (Class III) | D3025 |
| William F Smith | Little Compton, RI | — | Designer (Class IV Soil Evaluator) | D4034 |
| William G Silvia | Portsmouth, RI | — | Installer | L1409 |
| William H Howard | West Kingston, RI | — | Installer | L1971 |
| William J Rodenhiser | Holliston, MA | — | Installer | L1741 |
| William J Ross | East Greenwich, RI | — | Designer (Class I) | D1231 |
| William J Ross | East Greenwich, RI | — | Installer | L1632 |
| William J Vorra III | North Stonington, CT | — | Installer | L1957 |
| William J Wilbur | Warwick, RI | — | Installer | L0839 |
| William M Anderson | East Greenwich, RI | — | Designer (Class III) | D3001 |
| William P Napier | Portsmouth, RI | — | Designer (Class I) | D1230 |
| William P Napier | Portsmouth, RI | — | Installer | L1693 |
| William R Buckley, Jr. | Foxborough, MA | — | Designer (Class III) | D3109 |
| William S Gavitt | Westerly, RI | — | Installer | L1137 |
| William S Rice | Coventry, RI | — | Installer | L1631 |
| William Wright Jr. | West Greenwich, RI | — | Installer | L1051 |
| Wind River Environmental | Marlborough, MA | — | Septage Hauler | 827 |
| Zachary J Ferreira | Tiverton, RI | — | Installer | L1964 |
Most directories only tell you who to call. These are the cases where the honest answer is that you may not need this service at all, and the mistakes that cost people the most money.
Typical septic pumping pricing, with sources: what this costs in RI →
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