Figure 1 - National Trend in Annual Average Benzene Concentration in Metropolitan Areas: 1993-1998

Figure 1 - National Trend in Annual Average Benzene Concentration in Metropolitan Areas: 1993-1998

Figure 1a - National Trend in Annual Average Benzene Concentration in Metropolitan Areas: 1993-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.
Figure 1b - Map of National Trend in Annual Average Benzene Concentration in Metropolitan Areas: 1993-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

SOURCE: U.S. Environmental Protection Agency, Office of Air QualityPlanning and Standards, National Air Quality and Emissions Trends Report, 1998, available at http://www.epa.gov/oar/aqtrnd98/.