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DOVER, Del. (AP) — A former state senator who owns and operates a dry cleaning business in Sussex County is challenging a verbal decision by Delaware’s environmental secretary regarding clean-up of the property.

The state Environmental Appeals Board scheduled a daylong hearing Tuesday in Dover to hear the appeal from Joseph Booth and his wife Margaret, who own Thoro-Kleen Dry Cleaners in Georgetown.

State environmental officials issued a notice in 2015 regarding attempts to negotiate a voluntary cleanup agreement with Booth after environmental sampling revealed the presence of hazardous substances including tetrachloroethene and trichloroethene.