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At about 4:30 pm a transformer fire burnt three 13,000 volt cables, causing a three-alarm fire. Over a 130 firefighters rushed to the scene to put out the flames.
An investigation determined that carbon monoxide released from the explosion had migrated through the soil into the manhole. CO concentrations in the bottom of the manhole 2 days after the incident were 1,905 parts per million (ppm), well above the immediately dangerous to life and health (IDLH) concentration of 1,200 ppm.