5.1.4.12 December 

Figure 5-185: December 2002Time Series of Observed Organic Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grind resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-186: December 2002 Time Series of Observed Organic Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grind resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-187: December 2002Time Series of Observed Organic Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grind resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-188: December 2002 Time Series of Observed Organic Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5 Elemental Carbon 

5.1.5.1 January 

Figure 5-189: January 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

DATA FOR THE SOUTHWICK STN MONITOR (21-111-0043) IS NOT AVAILABLE FOR 

THIS MONTH 
 

Figure 5-190: January 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-191: January 2002 Time Series of Observed Organic Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Ashland STN 

monitor (21-019-0017). 
 

5.1.5.2 February 

Figure 5-192: February 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-193: February 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-194: February 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-195: February 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5.3 March 

Figure 5-196: March 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-197: March 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-198: March 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-199: March 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5.4 April 

Figure 5-200: April 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-201: April 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Southwick 

STN monitor (21-111-0043). 
 

Figure 5-202: April 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-203: April 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Ashland STN 

monitor (21-019-0017). 
 

5.1.5.5 May 

Figure 5-204: May 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-205: May 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Southwick 

STN monitor (21-111-0043). 
 

Figure 5-206: May 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-207: May 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Ashland STN 

monitor (21-019-0017). 
 

5.1.5.6 June 

Figure 5-208: June 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-209: June 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Southwick 

STN monitor (21-111-0043). 
 

Figure 5-210: June 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-211: June 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Ashland STN 

monitor (21-019-0017). 
 

5.1.5.7 July 

Figure 5-212: July 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-213: July 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Southwick 

STN monitor (21-111-0043). 
 

Figure 5-214: July 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-215: July 2002 Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Ashland STN 

monitor (21-019-0017). 
 

5.1.5.8 August 

Figure 5-216: August 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-217: August 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-218: August 2002Time Series of Observed Elemental Carbon levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-219: August 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5.9 September 

Figure 5-220: September 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-221: September 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-222: September 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-223: September 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5.10 October 

Figure 5-224: October 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-225: October 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-226: October 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-227: October 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5.11 November 

Figure 5-228: November 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-229: November 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-230: November 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-231: November 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.5.12 December 

Figure 5-232: December 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-233: December 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-234: December 2002Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-235: December 2002 Time Series of Observed Elemental Carbon levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6 Total PM2.5

5.1.6.1 January 

 Figure 5-236: January 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-237: January 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

 Figure 5-238: January 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-239: January 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.2 February 

Figure 5-240: February 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-241: February 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-242: February 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-243: February 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.3 March 

Figure 5-244: March 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-245: March 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-246: March 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-247: March 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.4 April 

Figure 5-248: April 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-249: April 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-250: April 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-251: April 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.5 May 

Figure 5-252: May 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-253: May 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-254: May 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-255: May 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.6 June 

Figure 5-256: June 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-257: June 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-258: June 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-259: June 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.7 July 

Figure 5-260: July 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-261: July 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-262: July 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-263: July 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.8 August 

Figure 5-264: August 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-265: August 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-266: August 2002Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-267: August 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.9 September 

Figure 5-268: September 2002Time Series of Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-269: September 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-270: September 2002Time Series of Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-271: September 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.10 October 

Figure 5-272: October 2002 Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the APCD/Barret 

STN monitor (21-111-0048). 

Figure 5-273: October 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-274: October 2002 Time Series of Total Reconstructed PM2.5 levels (red line) and Modeled 

Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Covington 

STN monitor (21-117-0007). 

Figure 5-275: October 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.11 November 

Figure 5-276: November 2002 Time Series of Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-277: November 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-278: November 2002 Time Series of Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-279: November 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.1.6.12 December 

Figure 5-280: December 2002 Time Series of Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

APCD/Barret STN monitor (21-111-0048). 

Figure 5-281: December 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Southwick STN monitor (21-111-0043). 
 

Figure 5-282: December 2002 Time Series of Total Reconstructed PM2.5 levels (red line) and 

Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Covington STN monitor (21-117-0007). 

Figure 5-283: December 2002 Time Series of Observed Total Reconstructed PM2.5 levels (red line) 

and Modeled Sulfate Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 

Ashland STN monitor (21-019-0017). 
 

5.2 FRM Scatter plots 

5.2.1 January 

Figure 5-284: January 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at 

both 36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-

0006). 

Figure 5-285: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-286: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-287: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-288: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-289: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-290: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-291: January 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.2 February 

Figure 5-292: February 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at 

both 36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-

0006). 

Figure 5-293: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-294: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-295: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-296: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-297: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-298: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-299: February 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.3 March 

Figure 5-300: March 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006) 

Figure 5-301: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-302: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-303: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-304: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-305: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-306: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-307: March 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.4 April 

Figure 5-308: April 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006). 

Figure 5-309: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-310: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-311: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-312: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-313: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-314: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-315: April 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.5 May 

Figure 5-316: May 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006). 

Figure 5-317: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor (21-

111-0048). 
 

Figure 5-318: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM monitor (21-

111-0044). 

Figure 5-319: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM monitor (21-

111-0051). 
 

Figure 5-320: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-321: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM monitor (21-

037-0003). 
 

Figure 5-322: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM monitor (21-

117-0007). 

Figure 5-323: May 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor (21-019-

0017). 
 

5.2.6 June 

Figure 5-324: June 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006). 

Figure 5-325: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor (21-

111-0048). 
 

Figure 5-326: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM monitor (21-

111-0044). 

Figure 5-327: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM monitor (21-

111-0051). 
 

Figure 5-328: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-329: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM monitor (21-

037-0003. 
 

Figure 5-330: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM monitor (21-

117-0007). 

Figure 5-331: June 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor (21-019-

0017). 
 

5.2.7 July 

Figure 5-332: July 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006). 

Figure 5-333: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor (21-

111-0048). 
 

Figure 5-334: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM monitor (21-

111-0044). 

Figure 5-335: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM monitor (21-

111-0051). 
 

Figure 5-336: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-337: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM monitor (21-

037-0003). 
 

Figure 5-338: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM monitor (21-

117-0007). 

Figure 5-339: July 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate Levels 

at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor (21-019-

0017). 
 

5.2.8 August 

Figure 5-340: August 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006). 

Figure 5-341: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-342: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-343: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-344: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-345: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-346: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-347: August 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.9 September 

Figure 5-348: September 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at 

both 36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-

0006). 

Figure 5-349: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-350: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-351: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-352: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-353: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-354: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-355: September 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.10 October 

Figure 5-356: October 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at both 

36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-0006). 

Figure 5-357: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-358: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-359: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-360: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-361: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-362: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-363: October 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.11 November 

Figure 5-364: November 2002Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at 

both 36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-

0006). 

Figure 5-365: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-366: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-367: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-368: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-369: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-370: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-371: November 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

5.2.12 December 

Figure 5-372: December 2002 Time Series of PM2.5 levels (red line) and Modeled Sulfate Levels at 

both 36km (blue line) and 12km (purple line) grid resolution for the Bullitt FRM monitor (21-029-

0006). 

Figure 5-373: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Barret FRM monitor 

(21-111-0048). 
 

Figure 5-374: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Beecher FRM 

monitor (21-111-0044). 

Figure 5-375: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Watson FRM 

monitor (21-111-0051). 
 

Figure 5-376: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the 37th & Southern FRM 

monitor (21-111-0043). 

Figure 5-377: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Campbell FRM 

monitor (21-037-0003). 
 

Figure 5-378: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Kenton FRM 

monitor (21-117-0007). 

Figure 5-379: December 2002 Time Series of Observed PM2.5 levels (red line) and Modeled Sulfate 

Levels at both 36km (blue line) and 12km (purple line) grid resolution for the Boyd FRM monitor 

(21-019-0017). 
 

6. Stacked Bar Charts 

The following section provides stacked bar charts comparing observed fine particulate matter 

composition and modeled fine particulate matter composition. Stacked bar charts have been 

developed for each of the STN monitoring sites in and near the Kentucky PM2.5 nonattainment 

areas (APCD/Barret, Southwick, Covington, and Ashland). 

The stacked bar chart allows a side-by-side comparison of each day’s observed and modeled 

compositional and total light extinction. Within each bar, the yellow portion of the bar 

represents the mass due to sulfates (SO4), the red portion of the bar represents the mass due to 

nitrates (NO3), the green portion of the bar represents the mass due to organic carbon (OC), the 

black the bar represents the portion of mass due to elemental (EC), and finally the grey portion of 

the bar represents the mass due to ammonium (NH4). The components are presented in the same 

order for both the observed (left hand bar) and modeled bar (right hand bar), so it is easy to 

identify days when the predicted mass for the component differs from the observed. The total 

height of the bar provides the total reconstructed mass of fine particulate matter. 

Just glancing through the stacked bars charts reiterates that sulfates are a large contributor to 

total PM2.5 mass in both nonattainment areas. The bar charts also suggest that organic carbon is 

also a large contributor to PM2.5 mass in the nonattainment areas. The bar charts reiterate the 

general under-prediction seen in previous sections. The bar charts show that the sulfate mass is 

generally well captured, with instances of both over and under prediction. Nitrates tend to be 

over predicted in the early spring and late winter, when the mass is the highest. The bars also 

suggest that organic carbon is generally under predicted at both sites. Looking across the bars, it 

appears as though this under prediction of organic carbon and the slight sulfates is the largest 

contributor to general PM2.5 under prediction. 

 
 

6.1 APCD/Barret (STN) 

 Figure 6-1: Stacked bar chart for the APCD/Barret STN monitoring site (21-111-0048) for January 

(top left), February (top right), March (center left), April (center right), May (bottom left), and 

June (bottom right). Observed composition is presented in the left hand bar, with modeled 

composition represented by the right hand bar. 
 

Figure 6-2: Stacked bar chart for the APCD/Barret STN monitoring site (21-111-0048) for July (top 

left), August (top right), September (center left), October (center right), November (bottom left), 

and December (bottom right). Observed composition is presented in the left hand bar, with 

modeled composition represented by the right hand bar. 
 

6.2 Southwick (STN) 

 No data available for January. 

Figure 6-3: Stacked bar chart for the Southwick STN monitoring site (21-111-0043) for January 

(top left), February (top right), March (center left), April (center right), May (bottom left), and 

June (bottom right). Observed composition is presented in the left hand bar, with modeled 

composition represented by the right hand bar. 
 

Figure 6-4: Stacked bar chart for the Southwick STN monitoring site (21-111-0043) for July (top 

left), August (top right), September (center left), October (center right), November (bottom left), 

and December (bottom right). Observed composition is presented in the left hand bar, with 

modeled composition represented by the right hand bar. 
 

6.3 Covington (STN) 

Figure 6-5: Stacked bar chart for the Covington STN monitoring site (21-117-0007) for January 

(top left), February (top right), March (center left), April (center right), May (bottom left), and 

June (bottom right). Observed composition is presented in the left hand bar, with modeled 

composition represented by the right hand bar. 
 

Figure 6-6: Stacked bar chart for the Covington STN monitoring site (21-117-0007) for July (top 

left), August (top right), September (center left), October (center right), November (bottom left), 

and December (bottom right). Observed composition is presented in the left hand bar, with 

modeled composition represented by the right hand bar. 
 

6.4 Ashland (STN) 

Figure 6-7: Stacked bar chart for the Ashland STN monitoring site (21-019-0017) for January (top 

left), February (top right), March (center left), April (center right), May (bottom left), and June 

(bottom right). Observed composition is presented in the left hand bar, with modeled composition 

represented by the right hand bar. 
 

Figure 6-8: Stacked bar chart for the Ashland STN monitoring site (21-019-0017) for July (top left), 

August (top right), September (center left), October (center right), November (bottom left), and 

December (bottom right). Observed composition is presented in the left hand bar, with modeled 

composition represented by the right hand bar.