Appendix C 

Historic Air Quality Data
Historic Air Quality Data i 

The Charlotte-Gastonia-Rock Hill, NC-SC 8-hour ozone Appendix C 

North Carolina Attainment Demonstration June 15, 2007 
Historic Air Quality Data ii 

The Charlotte-Gastonia-Rock Hill, NC-SC 8-hour ozone Appendix C 

North Carolina Attainment Demonstration June 15, 2007 

Table of Contents 

Historic Fourth Highest 8-Hour Ozone Values (ppm) for the Charlotte-Gastonia-Rock Hill, 

NC-SC Nonattainment Area ................................................................................................1 

Historic 8-Hour Ozone Design Values (ppm) for the Charlotte-Gastonia-Rock Hill, NC-SC 

Nonattainment Area.............................................................................................................2 
Historic Air Quality Data iii 

The Charlotte-Gastonia-Rock Hill, NC-SC 8-hour ozone Appendix C 

North Carolina Attainment Demonstration June 15, 2007 
Table 1: Historic Fourth Highest 8-Hour Ozone Values (ppm) for Charlotte-Gastonia-Rock Hill, NC-SC Nonattainment Area 

8-hour ozone values are listed in parts per million (ppm) Bolded values represent exceedances of the 8-hour ozone National Ambient Air Quality Standards. Underline values represent 4th highest values from Plaza monitoring site. The Plaza monitor was moved to the Garinger site location 

in 2000. 

Monitoring Sites County 

Shaded areas reflect no monitoring data available. 

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 

Crouse Lincoln 0.088 0.090 0.084 0.085 0.090 0.087 0.094 0.094 0.095 0.089 0.074 0.082 0.082 Arrowood Mecklenburg 0.087 0.096 0.099 0.094 0.104 0.104 0.087 0.086 0.094 0.073 0.077 0.085 0.080 County Line Mecklenburg 0.091 0.091 0.099 0.101 0.110 0.103 0.101 0.099 0.107 0.088 0.083 0.090 0.093 Garinger (Plaza) Mecklenburg 0.089 0.090 0.098 0.105 0.100 0.099 0.096 0.099 0.103 0.086 0.085 0.088 0.091 Enochville Rowan 0.086 0.088 0.092 0.099 0.102 0.094 0.103 0.108 0.087 0.080 0.088 0.089 Rockwell Rowan 0.092 0.092 0.100 0.089 0.101 0.107 0.092 0.097 0.106 0.098 0.080 0.086 0.085 Monroe Union 0.096 0.085 0.081 0.100 0.083 0.074 0.082 0.080 York York Cty, SC 0.085 0.087 0.079 0.080 0.087 0.092 0.076 0.080 0.096 0.076 0.071 0.079 0.078 

Historic Air Quality Data 

The Charlotte-Gastonia-Rock Hill, NC-SC 8-Hour Ozone 

North Carolina Attainment Demonstration 

 1 

 Appendix C 

June 15, 2007
Table 2: Historic 8-Hour Ozone Design Values (ppm) for Charlotte-Gastonia-Rock Hill, NC-SC Nonattainment Area 

8-hour design values are listed in parts per million (ppm) Bolded values represent violations of the 8-hour ozone National Ambient Air Quality Standards. Underline values represent design values that use 4th highest values from Plaza monitoring site. 

Monitoring Sites County 1994-1996 1995-1997 1996-1998 1997-1999 1998-2000 1999-2001 2000-2002 2001-2003 2002-2004 2003-2005 2004-2006Crouse Lincoln 

Shaded areas reflect data not available to calculate design value. 

0.087 0.086 0.086 0.087 0.090 0.091 0.094 0.092 0.086 0.081 0.079 

Arrowood Mecklenburg 0.094 0.096 0.099 0.100 0.098 0.092 0.089 0.084 0.081 0.078 0.080 County Line Mecklenburg 0.093 0.097 0.103 0.104 0.104 0.101 0.102 0.098 0.092 0.087 0.088 Garinger (Plaza) Mecklenburg 0.092 0.097 0.101 0.101 0.098 0.098 0.099 0.096 0.091 0.086 0.088 Enochville Rowan 0.088 0.093 0.097 0.098 0.099 0.101 0.099 0.091 0.085 0.085 Rockwell Rowan 0.094 0.093 0.096 0.099 0.100 0.098 0.098 0.100 0.094 0.088 0.083 Monroe Union 0.087 0.088 0.088 0.085 0.079 0.078 York York Cty, SC 0.083 0.082 0.082 0.086 0.085 0.082 0.084 0.084 0.081 0.075 0.076 

Historic Air Quality Data 

The Charlotte-Gastonia-Rock Hill, NC-SC 8-Hour Ozone 

North Carolina Attainment Demonstration 

 2 

 Appendix C 

June 15, 2007