When the 14-inch pipe ruptured, it sent steam and particles of asbestos insulation into the air, MacDonald said. “We’re not exactly certain yet as to what the cause is,’’ said Rowan ...

Con Edison says much of its 104-mile network of steam pipes is coated with asbestos insulation. Asbestos fibers can be thought of as tiny invisible feathers that, when disturbed, can float through ...