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.
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Conducting Unwitnessed Annulus Pressure Tests (PDF)(2 pp, 52 K)
Instructions and expectations for unwitnessed annulus pressure tests.
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Unwitnessed Annulus Pressure Test Form (PDF)(1 pg, 51 K,
June 2017)
Form for reporting unwitnessed annulus pressure tests.
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Water Brine Interface Tests for Class III Wells (PDF)(10 pp, 46 K,
June 2017)
Instructions from Federal Register Notice, volume 57, issue 7, page 1109, for water brine interface tests.