Conditionally Valid Data

{
  "id": "MLC-T-ENV-006095",
  "term": "Conditionally Valid Data",
  "field": "Environment",
  "definition": "Data from a continuous monitoring system that are not quality-assured, but which may become quality-assured if certain conditions are met. Examples of data that may qualify as conditionally valid are: data recorded by an uncertified monitoring system prior to its initial certification; or data recorded by a certified monitoring system following a significant change to the system that may affect its ability to accurately measure and record emissions. A monitoring system must pass a probationary calibration error test, in accordance with section 2.1.1 of appendix B to part 75 of this chapter, to initiate the conditionally valid data status. In order for conditionally valid emission data to become quality-assured, one or more quality assurance tests or diagnostic tests must be passed within a specified time period in accordance with § 75.20(b)(3).",
  "references": [
    "40 CFR 72.2 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/conditionally-valid-data/"
}