OAR 340-071-0210
Alteration of Existing Onsite Wastewater Treatment Systems

(1) Permit required. A person may not alter or increase the design capacity of an existing onsite wastewater treatment system not under a WPCF permit without first obtaining an alteration permit under this rule or a construction-installation permit under OAR 340-071-0160 (Permit Application Procedures — Construction, Installation, Alteration, and Repair Permits), as applicable. The permit application procedure is described in OAR 340-071-0160 (Permit Application Procedures — Construction, Installation, Alteration, and Repair Permits).
(2) An agent may issue an alteration permit if the requirements of either subsections (a) or (b) of this section are met.
(a) Alterations do not increase the system’s design capacity above the original design flow and:
(A) The existing system is not failing;
(B) The site setbacks in Table 1 can be met except that if the setbacks in Table 1 for septic tanks, treatment units, effluent sewers, and distribution units cannot be met, the agent may allow a reasonable installation; and
(C) In the agent’s opinion, use of the onsite system would not create a public health hazard or result in water pollution.
(b) Alterations do not exceed the existing system design capacity by more than 300 gpd or 50 percent, and:
(A) The existing system is not failing;
(B) The setbacks in Table 1 can be met; and
(C) In the agent’s opinion, using the onsite system would not create a public health hazard or result in water pollution.
(3) An application for a construction-installation permit under OAR 340-071-0160 (Permit Application Procedures — Construction, Installation, Alteration, and Repair Permits) is required when the existing system design capacity is proposed to be exceeded by more than 300 gpd or more than 50 percent.
(4) Certificate of Satisfactory Completion required. Upon completing installation of that part of a system for which a permit was issued, the system installer must comply with the requirements for pre-cover inspections in OAR 340-071-0170 (Pre-Cover Inspections). The agent must issue or deny the Certificate of Satisfactory Completion for the completed construction under OAR 340-071-0175 (Certificate of Satisfactory Completion). The projected daily sewage flow into the system may not be increased until the Certificate is issued.
[NOTE: All tables are found in OAR 340-071-0800 (Tables).]

Source: Rule 340-071-0210 — Alteration of Existing Onsite Wastewater Treatment Systems, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-071-0210.

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
Last Updated

Jun. 8, 2021

Rule 340-071-0210’s source at or​.us