- (1) Dosing tanks must meet the standards described in OAR 340-073-0025, except as otherwise allowed in this rule.
- (2) Each dosing tank employing one or more pumps must have a minimum liquid capacity equal to the design flow for flows up to 1,200 gallons per day. DEQ will determine tank sizing for dosing tanks with design flows greater than 1,200 gallons per day. The liquid capacity of dosing tanks must be as measured from the invert elevation of the inlet fitting.
- (3) Each dosing tank must be provided with a service access manhole having a minimum horizontal measurement of 18 inches.
- (4) Each dosing tank proposed to serve a commercial facility containing more than one pump must be provided with at least one service access manhole that provides adequate space to construct, install, service, and operate the equipment in accordance with the requirements of OAR chapter 340, divisions 071 and 073.
- (5) The installation manual described in OAR 340-073-0025(13) must include additional information about installation of the pump screen, pump control and alarm levels, and the watertight pass-through methods for electric wiring and pipe.
(6) The inlet fitting must extend below the lowest operating level of the pump.
[Publications: Publications referenced are available from the agency.]
Statutory/Other Authority
ORS 454.625 & 468.020
Statutes/Other Implemented
ORS 454.615
History
DEQ 29-2025, amend filed 10/01/2025, effective 01/01/2026
DEQ 13-2019, amend filed 05/16/2019, effective 05/16/2019
DEQ 11-2004, f. 12-22-04, cert. ef. 3-1-05
DEQ 27-1994, f. 11-15-94, cert. ef. 4-1-95
DEQ 15-1986, f. & ef. 8-6-86
DEQ 5-1982, f. & ef. 3-9-82
DEQ 10-1981, f. & ef. 3-20-81