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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 252. Department of Environmental Quality |
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Chapter 515. Management of Solid Waste |
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Subchapter 9. Groundwater Monitoring/Corrective Action |
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Part 3. BACKGROUND WATER QUALITY |
SECTION 252:515-9-31. Background water quality
Latest version.
- (a) Existing facilities. Unless background water quality has previously been approved by the DEQ, each monitoring well at an active land disposal facility permitted prior to April 9, 1994 shall be sampled quarterly for two full years to determine background water quality.(b) New facilities, with exception.(1) Except as provided for in (2) of this Subsection, monitoring wells installed at new land disposal facilities permitted on or after April 9, 1994 shall be sampled quarterly for one full year before waste may be deposited at the facility to determine background water quality.(2) The quarterly background water quality determination at new C&D landfills shall begin no later than thirty (30) days after the initial receipt of waste.(c) New groundwater monitoring wells. Unless otherwise approved by the DEQ, new groundwater monitoring wells installed after the effective date of this Chapter shall be sampled quarterly for one full year to establish background water quality.(d) Required parameters.(1) MSWLFs. MSWLFs shall, as a minimum, be monitored for:(A) the following groundwater quality constituents: pH, chemical oxygen demand, specific conductivity, chloride, sulfate, calcium, magnesium, nitrates, sodium, carbonates, potassium; and(B) those constituents in Appendix A of this Chapter.(2) C&D landfills. C&D landfills shall, as a minimum, be monitored for the following groundwater quality constituents: pH, chemical oxygen demand, and specific conductivity.(3) NHIW landfills. NHIW landfills shall, as a minimum, be monitored for:(A) the following groundwater quality constituents: pH, chemical oxygen demand, specific conductivity, chloride, sulfate, calcium, magnesium, nitrates, sodium, carbonates, potassium; and(B) other parameters specified in the permit, based on the types of wastes to be disposed.(4) Other land disposal facilities. Other land disposal facilities shall comply with the groundwater monitoring requirements for MSWLFs.