Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 25 - Wastewater Land Application Systems › Section 252:656-25-2 - Slow rate land application design

Current through Vol. 41, No. 20, July 1, 2024
(a)
Treatment.
Primary treatment of wastewater shall be completed in
				the primary lagoon cell(s) prior to being land applied. Wastewater shall not be
				land applied out of a primary lagoon cell.
(b)
Loading rates.
Hydraulic
				loading, BOD, suspended solids, nitrogen, phosphorus and crop selection shall
				all be considered in the process design of land applications systems. Typically
				loading rates of BOD and SS for municipal wastewater are far below the loading
				rates determined by other parameters and will not be a concern in system
				design.
(c)
Land area.
The total area required for a slow rate land application system includes the
				field area (application site), treatment and storage site (normally primary
				treatment lagoons and storage ponds), buffer zones and service roads.
(d)
Control.
The applicant shall
				show they have the right to control the use of the land application site. A
				long-term contract for a minimum of 20 years is required.
(e)
Buffer zone.
A buffer zone
				of at least 100 feet in width shall be provided between the land application
				site and adjacent property. Additional distance may be required where
				prevailing winds could cause aerosols to drift into residential areas. The
				buffer zone shall be a part of the permitted site. [See
				252:656-27-2(b)
				(relating to separation distance requirements).]
(f)
Public contact.
Wastewater
				shall be disinfected in accordance with 252:656-21 if it is to be applied to
				public contact areas.
(g)
Storage.
Storage of wastewater is required for periods when
				available wastewater exceeds design hydraulic loading rate, and when the ground
				is saturated or frozen. A water balance computation is used to estimate the
				storage requirement. Provide water balance computations of the estimated
				storage needs. There shall be at least 90 days of storage in addition to the
				detention time required for primary treatment. The monthly available wastewater
				for each month shall be determined by equation (25-5) in Appendix D.
(h)
Flow measurement.
Provide
				for the measurement of wastewater to be land-applied. Flow measurement shall be
				accomplished by flow meters, or the calibration of pumps and installation of
				run-time meters.
(i)
Restrictions.
There shall not be any berms or other barriers on a
				land application site that would cause the pooling or ponding of wastewater at
				the land application site. Additionally, there shall not be any berms or
				barriers that impede the natural flow of stormwater from the site. No land
				application site shall exceed the maximum slope requirements at OAC
				252:627-3.
(j)
Signs.
Suppliers are responsible for ensuring that the required signs, which describe
				the nature of the facility and advise against trespassing, are posted on signs
				every 200 feet around the perimeter of the permitted land application
				site.
(k)
Fencing.
All
				Category 5 reclaimed water land application sites shall be fenced to prevent
				unauthorized entry.
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 18 Ok Reg 2019, eff 6-11-01; Amended at 23 Ok Reg 937,
				  eff 6-15-06; Amended at 28 Ok Reg 1282, eff 7-1-11; Amended at 29 Ok Reg 1061,
				  eff 7-1-12