Conducting and Reporting Unwitnessed Part I Mechanical Integrity Tests

It is the practice of Region 5 to witness MITs. On occasion, Region 5 will allow an owner/operator to perform an MIT unwitnessed by EPA, if it proves impossible to resolve EPA scheduling conflicts AND the owner/operator can produce either a mechanical, digital, or third-party record (this includes a test witnessed by a State UIC inspector). When EPA tells an owner/operator that they can conduct an unwitnessed MIT, the owner/operator should follow the procedures outlined below to facilitate EPA review of the test results.

• Conducting Unwitnessed Annulus Pressure Tests (pdf) (50.48 KB)
  Instructions and expectations for unwitnessed annulus pressure tests.
• Unwitnessed Annulus Pressure Test Form (pdf) (50.29 KB, June 2017)
  Form for reporting unwitnessed annulus pressure tests.
• Water Brine Interface Tests for Class III Wells (pdf) (45.29 KB, June 2017)
  Instructions from Federal Register Notice, volume 57, issue 7, page 1109, for water brine interface tests.