Code of Colorado Regulations
400 - Department of Natural Resources
404 - Oil and Gas Conservation Commission
2 CCR 404-1 - PRACTICE AND PROCEDURE
Section 911 - CLOSURE OF OIL AND GAS FACILITIES

Universal Citation: 2 CO Code Regs 404-1 ยง 911

Current through Register Vol. 47, No. 17, September 10, 2024

a. Operators will close all Oil and Gas Facilities, including Drilling Pits and Cuttings Trenches, in accordance with an approved Form 27.

(1) Operators will obtain the Director's approval of the Form 27 prior to conducting any investigation or closure operations.

(2) The Form 27 will include a description of the proposed investigation and Remediation activities pursuant to Rule 913.

(3) Operators will close and remediate Emergency Pits as soon as the initial phase of emergency response operations is complete or any process Upset Conditions are controlled.

(4) Oil and Gas Facility closure pursuant to this Rule 911.a will be at the time of final site closure, Plugging and Abandonment, or decommissioning, unless the Director determines that a substantive change to the site requires a Form 27, or a reportable Spill or an historic impact is discovered during facility operation or removal.

b. Discovery of a Spill or Release During Closure. If an Operator discovers a Spill or Release during closure operations, the Operator will report the Spill or Release on a Form 19, Spill/Release Report, pursuant to Rule 912.

c. Pit Closure.

(1) Pit Evacuation. Operators will treat or dispose of E&P Waste pursuant to Rule 905 prior to backfilling and site Reclamation.

(2) Operators will collect a sufficient number of representative samples from locations beneath a Pit to demonstrate that no leakage of managed fluids has occurred. Operators will ensure that any soil left in place meets the cleanup concentrations listed in Table 915-1.

(3) Liner Disposal.
A. Synthetic Liner Disposal.Operators will remove and dispose of synthetic liners pursuant to all state and federal requirements for Solid Waste Disposal.

B. Constructed Soil Liners. Operators may remove constructed soil liner material for treatment or disposal. Alternatively, if an Operator leaves the constructed soil liner material in place, the Operator will rip the material and mix it with native soils in a manner to alleviate compaction and prevent an impermeable barrier to infiltration and Groundwater flow. Operators will demonstrate that the resulting material meets cleanup concentrations for contaminants of concern listed in Table 915-1.

Disclaimer: These regulations may not be the most recent version. Colorado may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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