Tier 3/Tier 4

{
  "id": "MLC-T-ENV-028111",
  "term": "Tier 3/Tier 4",
  "field": "Environment",
  "definition": "The general investigation of status and nature of environmental issues involves other levels of investigation below those of monitoring: in EMAP, these activities are designated as Tier 3 or Tier 4. Tier 3 studies are specialized, intensive studies of a finite duration to help diagnose or determine the extent of a degraded condition. Tier 4 studies are basic research studies that support EMAP, and they complement Tier 1, Tier 2, and Tier 3 studies.",
  "subject": "Science and research",
  "references": [
    "Environmental Modeling and Assessment Program (EMAP) Master Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/tier-3-tier-4/"
}