Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 740 - Implementation of Oklahoma's Water Quality Standards › Subchapter 15 - Use Support Assessment Protocols › Section 252:740-15-8 - Assessment of Agriculture support

Current through Vol. 41, No. 20, July 1, 2024
(a)
Scope.
The provisions of this Section shall be used to determine
				whether the beneficial use of Agriculture designated in OAC 252:730 for a
				waterbody is supported.
(b)
General support tests for chlorides, sulfates and TDS.
(1) The Agriculture beneficial use designated
				for a waterbody shall be deemed to be fully supported with respect to chloride
				if the mean of all chloride sample concentrations from that waterbody do not
				exceed the yearly mean standard prescribed in Appendix F or site-specific
				criteria promulgated in Appendix E of OAC 252:730 and no more than 10% of the
				sample concentrations from that waterbody exceed the sample standard prescribed
				in Appendix F or site-specific criteria promulgated in Appendix E of OAC
				252:730.
(2) The Agriculture
				beneficial use designated for a waterbody shall be deemed to be not supported
				with respect to chloride if the mean of all chloride sample concentrations from
				that waterbody exceeds the yearly mean standard prescribed in Appendix F or
				site-specific criteria promulgated in Appendix E of OAC 252:730, or greater
				than 10% of the sample concentrations from that waterbody exceed the sample
				standard prescribed in Appendix F or site-specific criteria promulgated in
				Appendix E of OAC 252:730. Provided, if the chloride sample concentrations are
				each less than 250 mg/L, then the Agriculture beneficial use shall be deemed to
				be fully supported with respect to chloride.
(3) The Agriculture beneficial use designated
				for a waterbody shall be deemed to be fully supported with respect to sulfate
				if the mean of all sulfate sample concentrations from that waterbody do not
				exceed the yearly mean standard prescribed in Appendix F or site-specific
				criteria promulgated in Appendix E of OAC 252:730 and no more than 10% of the
				sample concentrations from that waterbody exceed the sample standard prescribed
				in Appendix F or site-specific criteria promulgated in Appendix E of OAC
				252:730.
(4) The Agriculture
				beneficial use designated for a waterbody shall be deemed to be not supported
				with respect to sulfate if the mean of all sulfate sample concentrations from
				that waterbody exceeds the yearly mean standard prescribed in Appendix F or
				site-specific criteria promulgated in Appendix E of OAC 252:730, or greater
				than 10% of the sample concentrations from that waterbody exceed the sample
				standard prescribed in Appendix F or site-specific criteria promulgated in
				Appendix E of OAC 252:730. Provided, if the sulfate sample concentrations are
				each less than 250 mg/L, then the Agriculture beneficial use shall be deemed to
				be fully supported with respect to sulfate.
(5) The Agriculture beneficial use designated
				for a waterbody shall be deemed to be fully supported with respect to TDS if
				the mean of all TDS sample concentrations from that waterbody do not exceed the
				yearly mean standard prescribed in Appendix F or site-specific criteria
				promulgated in Appendix E of OAC 252:730 and no more than 10% of the sample
				concentrations from that waterbody exceed the sample standard prescribed in
				Appendix F or site-specific criteria promulgated in Appendix E of OAC
				252:730.
(6) The Agriculture
				beneficial use designated for a waterbody shall be deemed to be not supported
				with respect to TDS if the mean of all TDS sample concentrations from that
				waterbody exceeds the yearly mean standard prescribed in Appendix F or
				site-specific criteria promulgated in Appendix E of OAC 252:730, or greater
				than 10% of the sample concentrations from that waterbody exceed the sample
				standard prescribed in Appendix F or site-specific criteria promulgated in
				Appendix E of OAC 252:730. Provided, if the TDS sample concentrations are each
				less than 700 mg/L, then the Agriculture beneficial use shall be deemed to be
				fully supported with respect to TDS.