Weekend/Weekday Ozone Observations in the South Coast Air Basin

Figure 4.4-1b. Mean estimated source contributions by day-of-week at Pico Rivera for
summer 1999...................................................................................................... 4-51
Figure 4.4-1c. Mean estimated source contributions by day-of-week at Upland for
summers 1999 and 2000. ................................................................................... 4-52
Figure 4.4-2. Source apportionment of non-methane hydrocarbons for mobile sampling
loops and regional background sites – absolute contributions........................... 4-53
Figure 4.4-3. Source apportionment of non-methane hydrocarbons for mobile sampling
loops and regional background sites – percent contributions. ........................... 4-54
Figure 4.5-1a. Correlations of NO and NOx to black carbon at Azusa for different sets of
weekdays and hours of the day. ......................................................................... 4-55
Figure 4.5-1b. Correlations of NO and NOx to black carbon at Pico Rivera for different
sets of weekdays and hours of the day............................................................... 4-56
Figure 4.5-2a. Correlations of NO and NOx to CO at Azusa for different sets of weekdays
and hours of the day........................................................................................... 4-57
Figure 4.5-2b. Correlations of NO and NOx to CO at Pico Rivera for different sets of
weekdays and hours of the day. ......................................................................... 4-58
Figure 4.5-3a. Estimated ambient NOx associated with CO and black carbon for mobile
lab samples 10/2/00 (Monday)........................................................................... 4-59
Figure 4.5-3b. Estimated ambient NOx associated with CO and black carbon for mobile
lab samples 10/4/00 (Wednesday). .................................................................... 4-60
Figure 4.5-3c. Estimated ambient NOx associated with CO and black carbon for mobile
lab samples 10/7/00 (Saturday).......................................................................... 4-61
Figure 4.5-3d. Estimated ambient NOx associated with CO and black carbon for mobile
lab samples 10/8/00 (Sunday)............................................................................ 4-62
Figure 4.5-4
Figure 4.5-5
Figure 4.5-6
Figure 4.5-7
Estimated ambient NOx associated with CO and black carbon for mobile
lab samples - surface streets 10/6/00 (Friday). .................................................. 4-63
Estimated ambient NOx associated with CO and black carbon at Azusa
9/30/00 – 10/8/00 ............................................................................................... 4-64
Estimated ambient NOx associated with CO and black carbon at Pico
Rivera 9/30/00 10/8/00. ..................................................................................... 4-65
Correlation of predicted to measured NOx concentrations at Azusa and
Pico Rivera......................................................................................................... 4-66
Figure 4.5-8. Source apportionment of NOx for mobile sampling loops and regional
background sites – absolute contributions. ........................................................ 4-67
Figure 4.5-9. Source apportionment of NOx for mobile sampling loops and regional
background sites – percent contributions........................................................... 4-68
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