Okla. Admin. Code § 252:652-9-1

Current through Vol. 42, No. 7, December 16, 2024

Section 252:652-9-1 - Class I injection well facilities

The following shall apply to owners and operators of all Class I injection well facilities:

(1)Maximum injection pressure. The permitted maximum injection pressure that can be applied at the well head may be adjusted to account for pressure loss due to friction in piping or tubing.

(A)Overburden pressure gradient established. The maximum total pressure gradient (applied injection pressure plus fluid pressure) shall not exceed sixty-five percent (65%) of the established overburden pressure gradient, expressed in pounds per square inch per foot (psi/ft) of depth from ground surface to the top of the disposal zone.

(B)Overburden pressure gradient not established. If the effective overburden pressure gradient is not established, the maximum total pressure gradient shall not exceed 0.65 psi/ft of depth from ground surface to the top of the disposal zone.

(2)Annulus pressure.

(A) For nonhazardous facilities, the annulus fluid shall be maintained at a minimum positive pressure of 10 pounds per square inch gauge at the well head.

(B) For hazardous facilities, the annulus fluid shall be maintained at a pressure in accordance with 40 CFR 146.67(c).

(3)Groundwater tests. Groundwater from monitoring wells shall be analyzed for parameters specified in the permit at least once each month. The analyses and water levels shall be submitted as part of the quarterly report.

(4)Semi-annual pressure test. To satisfy 40 CFR 146.8(b)(2), the operator shall shut the well in semi-annually and pressurize the annulus for two (2) hours. Test pressure shall be at a minimum of 300 pounds per square inch or 125 % of the highest operating annulus pressure, whichever is greater, unless otherwise specified by the DEQ. Pressure loss or gain exceeding - 5 % or + 10 % respectively, from initial test pressure, will require additional tests and/or immediate repairs to ensure the mechanical integrity of the well.

(5)Solids or sludges tests. Any solid materials or sludges produced by or resulting from pre-treatment, filtering, or storage of fluids to be injected shall be tested to determine if they are hazardous wastes. Records of the disposition of the solids/sludges shall be kept on-site.

Okla. Admin. Code § 252:652-9-1

Added at 13 Ok Reg 2099, eff 7-1-96; Amended at 19 Ok Reg 1045, eff 6-1-02