11. Historical air monitoring data including AQI charts and maps are available at EPA's AirData website. 12. Scientists use RadNet air monitoring data to help estimate the potential radiation dose to humans. 13. He explored the area of his air monitoring for an obvious source of the soot. 14. A lab spokesman said air monitoring has detected no elevated levels of radioactivity in the area. 15. Lied to once, they doubted the accuracy of the railroad's air monitoring at Grand Central Terminal. 16. In the case of properly trained occupational NORM workers, air monitoring and analysis may be necessary. 17. In addition to air monitoring , EPA has tested dust for PCBs on surfaces at two sites. 18. Carroll said air monitoring equipment set up outside the factory had not detected any air quality problems. 19. The CNEP Clean Air Program operates one of the largest tribal air monitoring networks in the country. 20. An EPA air monitoring station can be found next to the railway station just to the north.