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Natural Resources Compliance 12 items

Produced-Water Reinjection UIC Class II Well Checklist

Verify permitting, mechanical integrity, and operating controls for a Class II underground injection well used for produced-water disposal or enhanced recovery under the SDWA UIC program.

40 CFR 14440 CFR 146 Subpart C40 CFR 147State UIC Program Rules

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Permitting & Authorization

  • Does the well hold a valid Class II injection permit or authorization by rule from the primacy agency? *
  • Has the injection zone and confining zone been evaluated to ensure containment of injected fluids? *
  • Was an area-of-review conducted to identify wells that could serve as conduits for fluid migration? *

Mechanical Integrity

  • Has a current mechanical integrity test (Part I internal and Part II external) demonstrated no significant leak or fluid movement? *
  • Is the tubing-casing annulus filled with a corrosion-inhibiting fluid and monitored for pressure? *
  • Record the date of the most recent mechanical integrity test. *

Operating Controls

  • Is injection pressure maintained below the maximum authorized surface injection pressure to prevent fracturing the confining zone? *
  • Are injection pressure, rate, and volume continuously monitored and recorded? *
  • Is an automatic alarm or shutdown provided for pressure exceedance or annulus pressure change? *

Monitoring & Reporting

  • Are monthly or quarterly injection volumes and pressures reported to the primacy agency as required? *
  • Is the injected fluid characterized to confirm it is compatible with the permit and the injection formation? *
  • Are records of monitoring, testing, and any exceedances retained for the required period? *

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