Construction dust containing silica particles floats in the air at the Bedford Ave. subway station on the L train, MTA tests found last week — but agency officials say the levels are too low to be dangerous.

Last week the agency brought in a contractor to analyze the air quality at Bedford Ave....

finds levels silica dust along R5NwJWHhXQc

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MTA finds low levels of silica dust along L train< assures riders air is safe to brea