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.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
Conducting Unwitnessed Annulus Pressure Tests (PDF)(2 pp, 52 K)
Instructions and expectations for unwitnessed annulus pressure tests.
Unwitnessed Annulus Pressure Test Form (PDF)(1 pg, 51 K,
Form for reporting unwitnessed annulus pressure tests.
Water Brine Interface Tests for Class III Wells (PDF)(10 pp, 46 K,
Instructions from Federal Register Notice, volume 57, issue 7, page 1109, for water brine interface tests.