Standard

{
  "id": "MLC-T-ENV-026540",
  "term": "Standard",
  "field": "Environment",
  "definition": "1. A physical or chemical quantity whose value is known exactly, and is used to calibrate or standardize instruments.\n\n2. A criterion for evaluating performance and results. It may be a quantity or quality of output to be produced, a rule of conduct to be observed, a model of operation to be adhered to, or a degree of progress toward a goal.\n\n3. An accepted specification which defines systems, processes, methodologies, or practices. It provides a basis for assuring consistent and acceptable minimum levels of quality, performance, safety and reliability. Standards usually are included in or accompany procedures.\n\n4. An authoritative technical requirement that establishes a measurable control to determine conformance with a particular EPA policy.",
  "subject": "Policy and guidance",
  "see_also": [
    "National Pretreatment Standard"
  ],
  "references": [
    "Drinking Water Technical & Legal Terms",
    "Program Evaluation Glossary",
    "Web Guide Glossary",
    "Information Directives Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/standard/"
}