Mechanical Integrity Demonstration

{
  "id": "MLC-T-ENV-016839",
  "term": "Mechanical Integrity Demonstration",
  "field": "Environment",
  "definition": "Title 40 of the Code of Federal Regulations (40 CFR) Section 146.8 lists approved methods for mechanical integrity tests (MIT); For Part I (internal) MIT: (1) Following an initial pressure test, monitoring of the tubing-casing annulus pressure with sufficient frequency to be representative, as determined by the Director, while maintaining an annulus pressure different from atmospheric pressure measured at the surface; (2) Pressure test with liquid or gas; or (3) Records of monitoring showing the absence of significant changes in the relationship between injection pressure and injection flow rate for certain Class II enhanced recovery wells. For Part II (external) MIT: (1) The results of a temperature or noise log; or (2) For Class II wells only, cementing records demonstrating the presence of adequate cement to prevent migration of fluids into an underground source of drinking water; or (3) For Class III wells where the nature of the casing precludes the use of temperature or noise logs, cementing records demonstrating the presence of adequate cement to prevent such migration; the monitoring program prescribed for Class III wells in 40 CFR Section 146.33(b) shall be designed to verify the absence of significant fluid movement.",
  "subject": "Land, waste and cleanup",
  "references": [
    "Underground Injection Control Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/mechanical-integrity-demonstration/"
}