By Maria Rocha-Buschel
The MTA released a report last Friday afternoon on the dust levels in L stations affected by the tunnel work during the first weekend of the slowdown, concluding that the amount of dust in the air of was “well below” the accepted standard.
The report measured dust concentrations in the public spaces at the Bedford and First Avenue stations before, during and after the work was being done, from noon on Friday, April 26 to noon on Monday, April 29.
The MTA is using a standard that was established by the American Council of Government Industrial Hygienists for people who are potentially exposed to these levels for eight hours a day over a 45-year career.
The transit agency noted in the report that there isn’t an established standard exposure limit for the (usually short) periods that straphangers would typically pass through subway stations so the agency is using the long-term chronic standard as a health-protective benchmark. Dust levels were found to be below the standard of 3,000 micrograms per cubic meter of air (µg/m3).