OAR 340-071-0155
Existing System Evaluation Report

(1) An evaluation of an existing onsite wastewater treatment system must meet the following requirements:
(a) An evaluation must be performed by a person with one or more of the qualifications listed below:
(A) Professional Engineer under ORS chapter 672 with knowledge and experience inspecting onsite systems;
(B) Registered Environmental Health Specialist or Wastewater Specialist under ORS chapter 700 with knowledge and experience inspecting onsite systems;
(C) A certified installer with knowledge and experience inspecting onsite systems;
(D) A certified maintenance provider with knowledge and experience inspecting onsite systems;
(E) A current NAWT inspector training and certification accreditation;
(F) Other similar license or certification DEQ approves.
(b) An evaluation must include the following:
(A) An examination of the records available on the existing system, including all permit records and pumping and other maintenance records.
(B) For existing systems without a permit record, the inspector must create a record to document system materials, components, and location. Methods used to create the record may include the use of soil probes, metal detectors, electronic pipe tracers, radio and video technology, and uncovering system components.
(C) A field inspection of the existing system.
(D) A report of findings on a DEQ-approved form including the information obtained relevant to system performance, such as age; usage; records of installation, maintenance, and repairs; type, size, capacity, and condition of components; evidence of any failures; other relevant information, such as condition of repair area if known; and a complete sketch of the system showing location and distances of major components.
(E) The evaluation must include all portions of the system that serve the facility, including any portion located on a lot or parcel different from the lot or parcel on which the facility the system serves is located.
(2) A person may not conduct an existing system evaluation required by this rule unless the person meets the qualifications in subsection (1)(a) of this rule prior to conducting the evaluation.
(3) Any person may request an agent to provide an evaluation report on an existing onsite wastewater treatment system.
(4) A completed application form must be submitted to the agent with all necessary exhibits and the existing system evaluation fee in OAR 340-071-0140 (Onsite System Fees)(2).

Source: Rule 340-071-0155 — Existing System Evaluation Report, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-071-0155 (accessed May 26, 2025).

340–071–0100
Definitions 340–071–0110
Purpose 340–071–0115
Technical Review Committee 340–071–0120
Jurisdiction and Policy 340–071–0130
General Standards, Prohibitions and Requirements 340–071–0135
Approval of New or Innovative Technologies, Materials, or Designs for Onsite Systems 340–071–0140
Onsite System Fees 340–071–0150
Site Evaluation Procedures 340–071–0155
Existing System Evaluation Report 340–071–0160
Permit Application Procedures — Construction, Installation, Alteration, and Repair Permits 340–071–0162
Permit Application Procedures — WPCF Permits 340–071–0165
Permit Denial Review — Construction-Installation, Repair, Alteration Permits 340–071–0170
Pre-Cover Inspections 340–071–0175
Certificate of Satisfactory Completion 340–071–0185
Decommissioning of Systems 340–071–0200
Prior Construction Permits or Approvals 340–071–0205
Authorization to Use Existing Systems 340–071–0210
Alteration of Existing Onsite Wastewater Treatment Systems 340–071–0215
Repair of Existing Systems 340–071–0220
Standard Subsurface Systems 340–071–0260
Alternative Systems, General 340–071–0265
Capping Fills 340–071–0275
Pressurized Distribution Systems 340–071–0280
Seepage Trench System 340–071–0285
Redundant Systems 340–071–0290
Conventional Sand Filter Systems 340–071–0295
Conventional Sand Filter Design and Construction 340–071–0302
Recirculating Gravel Filter (RGF) 340–071–0310
Steep Slope Systems 340–071–0315
Tile Dewatering System 340–071–0320
Split Waste Method 340–071–0325
Gray Water Waste Disposal Sumps 340–071–0330
Nonwater-Carried Systems 340–071–0335
Cesspools and Seepage Pits 340–071–0340
Holding Tanks 340–071–0345
Alternative Treatment Technologies (ATTs) 340–071–0360
Absorption Trenches in Saprolite 340–071–0400
Geographic Area Special Considerations. 340–071–0410
Rural Area Consideration 340–071–0415
For Cause Variances 340–071–0420
Hardship Variances 340–071–0425
Variance Officers 340–071–0430
Variance Hearings and Decisions 340–071–0435
Variance Permit Issuance, Inspections, Certificate of Satisfactory Completion 340–071–0440
Variance Appeals 340–071–0445
Variance Administrative Review 340–071–0460
Moratorium Areas 340–071–0500
Community Systems 340–071–0520
Large Systems 340–071–0600
Sewage Disposal Service Licenses 340–071–0650
Training and Certification Requirements for System Installers and Maintenance Providers 340–071–0800
Tables
Verified

May 26, 2025

Rule 340-071-0155's source at or​.us