Oklahoma Code § 2-20-13

Title 2. Agriculture: Irrigation systems
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A.  All irrigation systems into which any swine waste will be
injected shall be equipped with one or both of the following
systems:
1.  An antipollution system, approved by the State Board of
Agriculture, capable of preventing the backflow of swine waste into
the groundwater.  The system shall include a safety check valve with
a removable inspection port, anti-syphon vent, and low-pressure
escape drain.  An interlock device shall be installed on pumps that
pump the swine waste so that if a fresh water irrigation pump shuts

down, the pump that pumps the swine waste will also immediately shut
down, preventing the chance of leakage past the check valve; or
2.  A system which provides for a complete and total
disconnection between the flow of fresh water and the flow of swine
waste.  The system shall be capable of a manual disconnection
between fresh water and the swine waste.
B.  The Oklahoma Department of Agriculture, Food, and Forestry
shall make annual on-site inspections examining the operative status
of the check valves and interlock devices.
C.  The operator of the irrigation system shall be responsible
to ensure:
1.  That the valves and interlock devices remain operative
between annual inspections by the Department; or
2.  Complete disconnection from fresh water when introducing
swine waste into the system.
Added by Laws 1997, c. 331, § 11, eff. Sept. 1, 1997.  Renumbered
from § 9-205.5 of this title by Laws 2005, c. 292, § 25, eff. July
1, 2005.  Amended by Laws 2007, c. 31, § 13, eff. Nov. 1, 2007.

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