Class II Equivalent Method

{
  "id": "MLC-T-ENV-005091",
  "term": "Class II Equivalent Method",
  "field": "Environment",
  "definition": "Equivalent method for PM2.5 or PM10-2.5 that utilizes a PM2.5 sampler or PM10-2.5 sampler in which integrated PM2.5 samples or PM10-2.5 samples are obtained from the atmosphere by filtration and subjected to a subsequent filter conditioning process followed by a gravimetric mass determination, but which is not a Class I equivalent method because of substantial deviations from the design specifications of the sampler specified for reference methods in appendix L or appendix O (as applicable) of part 50 of this chapter, as determined by EPA.",
  "references": [
    "40 CFR 53.1 (CFR 2018)"
  ],
  "url": "https://mlchart.com/terminology/environment/class-ii-equivalent-method/"
}