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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| 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 |
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