A Hartford-based construction company is under investigation for an “excessive” buildup of poisonous fumes inside a downtown building that sent 14 people to the hospital Wednesday, officials say. Alberca Construction Co. LLC is being probed in connection with a buildup of carbon monoxide that emergency crews detected at a commercial building at 73 Howe St., according to the federal Occupational Safety and Health Administration. Yale University owns the Howe Street property, New Haven Mayor Justin Elicker said. Officials said the construction workers who were renovating the building did not properly vent the fumes wafting from a propane-powered saw they were using to cut concrete, causing a buildup of carbon monoxide that was 10 times the safe amount. The workers also were not using carbon monoxide detectors, officials added. Alberca said his company was hired by Babbidge Construction Co. on Chapel Street in New Haven for the renovation work. Rick Fontana, the city’s director of emergency operations, confirmed that Babbidge was the general contractor overseeing the project. However, only Alberca Construction was being investigated, according to Fitzgerald.
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