OWTS Licensed Professionals The RIDEM OWTS (Onsite Wastewater Treatment Systems) Permitting program licenses five different categories of OWTS Professionals. There are four types of septic designers (Class-I, Class-II, Class-III, and Class-IV) and licensed Installers. An individual seeking to obtain one of these licenses must apply for and pass a written exam pending they meet the minimum qualifications to apply. Licenses expire every 3 years and must be renewed upon expiration. Each license type requires a different prerequisite and allows the individual to perform differing septic work. An outline of each category can be found below, but for more information, visit our Rules and Regulations. Installers An Installer’s License authorizes an individual to install, construct, alter or repair an OWTS. Applicants for an Installer’s License will be required to demonstrate possession of and ability to properly use a level or transit and to obtain a passing grade on a written examination. Class-I Designers A Class I License authorizes the design of a repair to an OWTS, or any component thereof. A valid Installers license is required to apply. Class-II Designers A Class II License authorizes the design of an OWTS repair or OWTS for an alteration to a structure with certain stipulations or a New Building Construction under 900 GPD not requiring certain variances. Registration as a Professional Land Surveyor with the RI State Board of Registration for Professional Land Surveyors is required to apply. Class-III Designers A Class III license authorizes the design of any OWTS. Class-III designers no longer need to pass an examination; however, the applicant must still apply for the license and must have be a current Professional Engineer in either Civil or Environmental. Class IV Soil Evaluator's License A Class IV license authorizes the performance of soil evaluations. An applicant must prove they meet the eligibility requirements outlined in the Regulations and must separately pass a written and field exam. OWTS Professionals List of Licensed OWTS Designers and Soil Evaluators PDF file, less than 1mbmegabytes List of Licensed OWTS Installers PDF file, less than 1mbmegabytes BSF Trained Installers & Designers PDF file, less than 1mbmegabytes Permitted Septage Transporters (Septic Tank Sewage Pumping Service Companies) PDF file, less than 1mbmegabytes Innovative and Alternative Systems Service Provider Registry Septic System Inspectors OWTS Licensing Disciplinary Actions Continuing Education Continuing Education Information 2023 Class and Training Schedule New England Onsite Wastewater Training Program OWTS CEU Policy and Reporting Form PDF file, less than 1mbmegabytes Study Guides & Exams Exam Schedule for OWTS Licensing Designer Exam Study Guides OWTS Installer Exam Study Guide PDF file, about 3mbmegabytes Class IV OWTS Designer Examination Study Guide PDF file, about 2mbmegabytes Class II OWTS Designer Examination Study Guide PDF file, about 2mbmegabytes Class I OWTS Designer Examination Study Guide PDF file, about 1mbmegabytes Approved Soil Courses (Cl-IV Exam Eligibility) PDF file, less than 1mbmegabytes OWTS Licensing Applications and Forms OWTS Licensing Applications and Forms OWTS Application for Class-I Designer License Renewal 2023 PDF file, less than 1mbmegabytes OWTS Application for Installer Renewal 2023 PDF file, less than 1mbmegabytes OWTS Application for Renewal of Designer License Class IV* PDF file, less than 1mbmegabytes OWTS Application for Installer Examination and License PDF file, less than 1mbmegabytes OWTS Application for Designer License Examination (Classes I and II) PDF file, less than 1mbmegabytes OWTS Application for Soil Evaluator License Examination PDF file, less than 1mbmegabytes Cl-IV Soil Evaluator Exam Eligibility Assessment Request Form PDF file, less than 1mbmegabytes Approved Soil Courses (Cl-IV Exam Eligibility) PDF file, less than 1mbmegabytes Application for New Designers’ License After Passing Exam (Classes I,II, and IV) PDF file, less than 1mbmegabytes Class-II Renewal Form With and Without Class-IV License PDF file, less than 1mbmegabytes Class-III Renewal Form With and Without Class-IV License PDF file, less than 1mbmegabytes CIass-I Designer Renewal Application Form 2020 PDF file, less than 1mbmegabytes Construction Permit Application Submission Checklist PDF file, less than 1mbmegabytes OWTS Application for Class-III License PDF file, less than 1mbmegabytes Installer License Renewal Application Form 2020 PDF file, less than 1mbmegabytes Self Reporting CEU Form PDF file, less than 1mbmegabytes View all forms OWTS Rules Rules Establishing Minimum Standards Relating to Location, Design, Construction and Maintenance of Onsite Wastewater Treatment Systems (250-RICR-150-10-6) Guidance Documents Groundwater Table Adjustment Factors O&M Service Provider Checklists Septic System Checkup Manual PDF file, less than 1mbmegabytes System Suitability Determination Guide PDF file, less than 1mbmegabytes Soil Evaluation Guidance Document PDF file, less than 1mbmegabytes Guidelines for the Design, Use, and Maintenance of Pressurized Drainfields - November 2013 PDF file, about 5mbmegabytes OWTS Construction Permit Application Guidance PDF file, less than 1mbmegabytes Fact Sheets 2002 EPA Design Manual OWTS Designer / Soil Evaluator Examination Eligibility Fact Sheet PDF file, less than 1mbmegabytes Summary of RI Municipal Onsite Wastewater Programs PDF file, less than 1mbmegabytes
Permitted Septage Transporters (Septic Tank Sewage Pumping Service Companies) PDF file, less than 1mbmegabytes
OWTS Application for Designer License Examination (Classes I and II) PDF file, less than 1mbmegabytes
Application for New Designers’ License After Passing Exam (Classes I,II, and IV) PDF file, less than 1mbmegabytes
Guidelines for the Design, Use, and Maintenance of Pressurized Drainfields - November 2013 PDF file, about 5mbmegabytes