The term “cancer cluster” means the incidence of a particular cancer within a population group, a geographical area, and a period of time that is greater than expected for such group, area, and period.

The term “particular cancer” means one specific type of cancer or a type of cancers scientifically proven to have the same cause.

The term “population group” means a group, for purposes of calculating cancer rates, defined by factors such as race, ethnicity, age, or gender.