Department of Environmental Quality
Chapter 340
Division 53
GRAYWATER REUSE AND DISPOSAL SYSTEMS
340-053-0070
Definitions
The following definitions apply to this division of rules:
(1) "Beneficial purpose or reuse" means graywater is utilized for a resource value, such as to provide moisture. Examples include, but are not limited to, the irrigation of landscape vegetation, planters, greenhouses, vegetated roofs, and living walls.
(2) "Department" means the Oregon Department of Environmental Quality.
(3) "Evapotranspiration" means the combined loss of water from a given area, and during a specified period of time, by evaporation from the soil surface and by transpiration from plants.
(4) "Graywater" has the meaning given for “gray water” in ORS 454.605.
(a) "Type 1 graywater" means graywater that contains dissolved oxygen and may have passed through primary graywater treatment, but has not passed through secondary graywater treatment.
(b) “Type 2 graywater” means graywater that is oxidized and has passed through secondary graywater treatment.
(c) “Type 3 graywater” means graywater that is oxidized and has been disinfected following secondary graywater treatment.
(5) "Graywater treatment" means the alteration of the quality of graywater by physical, chemical, or biological means or combination thereof to reduce the risk of failure of the graywater reuse and disposal system, degradation of water quality or the environment, and risk to public health.
(a) “Primary graywater treatment” means a physical process to remove a portion of the grease, floatable and settable solids from graywater.
(b) “Secondary graywater treatment” means a chemical or biological process to remove a portion of the dissolved or suspended biodegradable organic matter and other suspended solids.
(6) ”Graywater reuse and disposal system” means any existing or proposed graywater collection and distribution system equipped with a diversion device that can direct graywater between beneficial reuse and disposal.
(7) “Holding tank system” has the meaning given in OAR 340-071-0100.
(8) “Irrigation” means the application of water to soil, mulch or compost usually to supplement precipitation and supply moisture for the growth of vegetation or for the production of compost.
(9) “Landscape pond” means a constructed body of water that does not normally result in public contact through activities such as boating, fishing or body-contact recreation. Typical landscape ponds include fish ponds, water gardens and golf course water ponds. Landscape ponds do not include ponds designed to capture and infiltrate stormwater.
(10) “Mulch” means a protective covering spread or left on the ground to reduce evaporation, maintain even soil temperature, prevent erosion, control weeds or enrich the soil.
(11) "Onsite wastewater treatment system" has the meaning given in OAR 340-071-0100.
(12) "Owner" means any person who alone, jointly or severally:
(a) Has legal title to the single lot, parcel, dwelling, dwelling unit or commercial facility on which a graywater reuse and disposal system is located;
(b) Has care, charge or control of any real property on which a graywater reuse and disposal system is located, as agent, executor, administrator, trustee, commercial lessee or guardian of the estate of the holder of legal title; or
(c) Is the contract purchaser of real property on which a graywater reuse and disposal system is located.
(13) “Oxidized graywater” means a treated graywater in which the organic matter is stabilized, nonputrescible, and contains dissolved oxygen.
(14) "Person" has the meaning given in ORS 468.005.
(15) “Sewerage system” has the meaning given in ORS 468B.005.
(16) “Stormwater management structure” means both public and private structural stormwater controls such as swales, infiltration basins, Underground Injection Control (UIC) systems or similar structures intended to infiltrate stormwater into the ground.
(17) "Subsurface irrigation" means the slow release of water below the surface of soil, compost or mulch for the purpose of supplying moisture.
(18) “Vegetated roof” means a system of soil and vegetation that partially or completely covers the roof of a building or man-made structure. Vegetated roofs are also known as living roofs, green roofs or ecoroofs.
(19) "Waters of the state" has the meaning given in ORS 468B.005.
(20) "WPCF permit" means a Water Pollution Control Facilities permit as defined in OAR chapter 340, division 45.
Statutory/Other Authority: ORS 454.610, 454.625, 468.020 & 468B.010
Statutes/Other Implemented: ORS 454.610, 454.615, 468B.020 & 468B.050
History:
DEQ 15-2011, f. & cert. ef. 9-12-11