OAR 340-073-0030
Dosing Septic Tank

(1)

A dosing septic tank may discharge effluent with a pump or dosing siphon from the clear zone at the outlet end of the tank. These may be considered for installations where the design flow does not exceed 600 gallons per day.

(2)

Special Configuration:

(a)

The minimum total primary volume of the tank must be 1,100 gallons for flows less than or equal to 450 gallons per day and 1,500 gallons for flows greater than 450 and up to 600 gallons per day.

(b)

The submerged volume at the lowest operating liquid level must be at least 900 gallons. The remaining capacity must be used to ensure optimum surge capacity and reserve storage capacity.

(c)

Liquid levels must be controlled in a manner that is consistent with pump dosing requirements described in OAR 340, divisions 071 and 073.

(d)

All apparatus must be constructed and installed to facilitate ease of service without having to alter any other component.

(e)

The installation manual described in OAR 340-073-0025 (Tank Construction)(13) must include additional information about siphon selection, installation of the pump or siphon vault and screen, pump control and alarm levels, and the watertight pass-through methods for electrical wiring and pipe.

Source: Rule 340-073-0030 — Dosing Septic Tank, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-073-0030.

340‑073‑0025
Tank Construction 340‑073‑0026
Septic Tanks 340‑073‑0030
Dosing Septic Tank 340‑073‑0035
Distribution Boxes, Drop Boxes, and Diversion Valves: Distribution Boxes 340‑073‑0040
Distribution Boxes, Drop Boxes, and Diversion Valves: Drop Boxes 340‑073‑0041
Distribution Boxes, Drop Boxes, and Diversion Valves: Filter Fabric 340‑073‑0045
Distribution Boxes, Drop Boxes, and Diversion Valves: Diversion Valves 340‑073‑0050
Distribution Boxes, Drop Boxes, and Diversion Valves: Dosing Tanks 340‑073‑0055
Distribution Boxes, Drop Boxes, and Diversion Valves: Dosing Assemblies: Effluent Pumps, Controls and Alarms, and Dosing Siphons 340‑073‑0056
Distribution Boxes, Drop Boxes, and Diversion Valves: Effluent Filters 340‑073‑0060
Distribution Boxes, Drop Boxes, and Diversion Valves: Pipe Materials and Construction 340‑073‑0065
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Privies and Portable Toilet Shelters 340‑073‑0070
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Unsealed Earth Pits for Privies 340‑073‑0075
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Self-Contained Nonwater-Carried Toilet Facilities 340‑073‑0080
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Construction of Gray Water Waste Disposal Sumps 340‑073‑0085
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Flexible Membrane Liners for Sand Filters Treating Septic Tank Effluent
Last Updated

Jun. 8, 2021

Rule 340-073-0030’s source at or​.us