SECTION 1. Section 142B of chapter 111 of the General Laws, as appearing in the 2016 Official Edition, is hereby amended by striking out the eighth paragraph and inserting in place thereof the following paragraph:- The department shall maintain and operate such air sampling stations and devices; make or perform such routine and special examinations, inspections, observations, determinations, laboratory analyses, and surveys; maintain such records; and perform such other acts as it deems necessary to conduct an adequate air pollution control program within the metropolitan air pollution control district. The department shall, in its annual Air Monitoring Network plan, which it prepares in accordance with Title 40 CFR Part 58.10, at each location where the department monitors for particulate matter 2.5 micrometers and smaller in diameter, monitor and report for ultrafine particulate matter less than 100 nanometers in diameter, in addition to its other monitoring at those locations.
SECTION 2. Section 1 shall take effect on January 1, 2021.
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