Observed Release

{
  "id": "MLC-T-ENV-019283",
  "term": "Observed Release",
  "field": "Environment",
  "definition": "An observed release is established for the ground water, surface water, or air migration pathway either by chemical analysis or by direct observation. The minimum requirements for establishing an observed release by chemical analysis are analytical data demonstrating the presence of a hazardous substance in the medium significantly above background level, and information that some portion of that increase is attributable to the site. The minimum criterion for establishing an observed release by direct observation is evidence that the hazardous substance was placed into or has been seen entering the medium.",
  "subject": "Health and safety",
  "references": [
    "Hazard Ranking System Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/observed-release/"
}