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Hazardous Waste Site Classification

Inactive Hazardous Waste Disposal Site Classification

Five classifications for hazardous waste sites are specified in the Environmental Conservation Law:

Class 1 Site: Causing, or presenting an imminent danger of causing, irreversible or irreparable damage to the public health or the environment - immediate action is required.

Class 2 Site: Significant threat to the public health or environment - action required.

Class 3 Site: Does not present a significant threat to the environment or public health - action may be deferred.

Class 4 Site: Site properly closed - requires continued management.

Class 5 Site: Site properly closed - does not require continued management.


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