Cluster

{
  "id": "MLC-T-ENV-005328",
  "term": "Cluster",
  "field": "Environment",
  "definition": "1. A cluster is a set of Revision Checklists developed for federal rules promulgated between a specified period. The cluster system was set up by EPA in an attempt to limit the number of times states would need to submit revision applications in response to the numerous federal changes stemming from the 1984 HSWA amendments. The cluster periods coincide with the annual publications of the CFR. The July date was selected to give states time to work on regulations and take them to the legislature (for those states that have legislative review. The cluster system applies only to state modifications that are necessary because of changes to the federal program after June 30, 1984. It does not apply to state-initiated modifications, or rules promulgated between July 27, 1982, and June 30, 1984 (Checklists 1-8). There are three types of clusters: HSWA Cluster, Non-HSWA Cluster, and RCRA Cluster.\n\n2. An aggregation of cases of a disease or other health-related condition, particularly cancer and birth defects, which are closely grouped in time and place. The number of cases may or may not exceed the expected number; frequently the expected number is not known.\n\n3. Aggregation of cases of a disease or other health-related condition, particularly cancer and birth defects, which are closely grouped in time and place. The number of cases may or may not exceed the expected number; frequently the expected number is not known.",
  "subject": "Health and safety",
  "references": [
    "RCRA State Authorization Terms & Topics",
    "CDC 2005",
    "CDC Epidemiology Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/cluster/"
}