Chapter 7: Daily afternoon weekday lead concentration (in
microgram per cubic meter) at the San Diego Freeway in Los
Angeles (Fall 1977).

      9.5 10.7  8.3  9.8  9.1  9.4  9.6 11.9  9.5 12.6
     10.5  8.9 11.4 12.0 12.4  9.9 10.9 12.3 11.0  9.2
      9.3  9.3 10.5  9.4  9.4  8.2 10.4  9.3  8.7  9.8
      9.1  2.9  9.8  5.7  8.2  8.1  8.8  9.7  8.1  8.8
     10.3  8.6 10.2  9.4 14.8  9.9  9.3  8.2  9.9 11.6
      8.7  5.0  9.9  6.3  6.5 10.2  8.8  8.0  8.7  8.9
      6.8  6.6  7.3 16.7