WESTFIELD, NJ - A ruptured chlorine drum has forced closure of Nomahegan Swim Club on Springfield Avenue Friday afternoon.

According to a Westfield police officer on the scene, a 1,000-gallon drum of chlorine ruptured.

In addition to the swim club being closed, some area streets around the swim club near the border of Mountainside and Springfield have been cordoned off. According to one Westfield officer, one side of Nomahegan Drive, which backs up to the edge of the swim club's property, is undergoing a voluntary evacuation by its residents.

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According to Breaking News Network (BNN), a Hazmat team arrived and geared up for a Class A entry. EMS was requested to the scene for one patient, who was exposed to the leaked chlorine and is undergoing a decontamination procedure, according to BNN.

A white tanker truck representing Todd Harris Co. Inc. Pool and Spa Services of Edison was parked on a grass island on Nomahegan Drive, one block from the swim club property. One of the occupants of the truck declined to comment on what was happening.

This is a developing story.