Law enforcement officers canvassed a large office building near ground zero yesterday after receiving reports of an individual becoming ill from a substance inside an envelope delivered to the building, officials said.

An unidentified individual showed symptoms of dizziness and burning after opening an envelope in the basement of 55 Water St. at about 11:30 a.m. and reported the allegedly responsible substance, which was never found by the police department’s hazardous material unit.

“We have no reason to believe that there was anything unusual about the envelope,” Chief Nick Del Re of the city’s fire department said outside of the building. “The time and location are factors.”

The report came during a memorial service for those who died during the terrorist attacks of September 11, 2001.

Eight other people were in the basement room when the individual reported the substance but were unsure if they were exposed to anything, Chief John Bley of the fire department said.

As a precautionary measure, the nine individuals were taken to a portable decontamination unit near the scene where they received a thorough wash, police said. Decontamination units use water to wash victims infected by hazardous materials.

After investigators determined there was no hazardous substance in the room, the individuals involved declined offers to go to local hospitals, police said.