*** DRAFT DATA ***

 

2008††††††††† 1-Hour Ozone††††††††† (updated through September 30, 2008)

 

AQS Number

 

Site Name

1st Max

1-Hour

(ppm)

Date 1stMax

1-Hour

2nd Max

1-Hour

(ppm)

Date 2nd Max

1-Hour

3rd Max

1-Hour

(ppm)

Date 3rd Max

1-Hour

4th Max

1-Hour

(ppm)

Date 4th Max

1-Hour

5th Max

1-Hour

(ppm)

Date 5th Max

1-Hour

08-001-3001

Welby

0.100

08/29

0.095

08/05

0.092

07/10

0.089

06/20

0.086

07/15

08-005-0002

* Highland

0.065

04/04

0.064

04/08

0.064

04/18

0.062

04/19

0.062

04/20

08-013-0011

S. Boulder Creek

0.089

07/10

0.089

07/25

0.086

07/16

0.085

05/31

0.084

07/18

08-031-0014

Carriage

0.094

08/05

0.090

08/29

0.089

07/10

0.085

06/20

0.085

07/26

08-031-0025

** Denver - Animal Shelter

0.100

07/10

0.098

08/05

0.087

06/20

0.087

08/24

0.086

08/29

08-035-0004

Chatfield State Park

0.101

07/10

0.098

06/20

0.095

08/29

0.092

08/24

0.090

06/30

08-041-0013

Colo. Spgs. - Academy

0.085

05/24

0.083

07/10

0.082

08/06

0.080

07/18

0.078

07/02

08-041-0016

Manitou Springs

0.087

05/24

0.085

08/06

0.083

07/10

0.083

07/11

0.076

06/10

08-045-0012

Rifle - Health

0.081

07/09

0.080

07/10

0.075

08/19

0.074

07/11

0.074

07/24

08-059-0002

Arvada

0.093

08/05

0.093

08/29

0.092

07/10

0.088

07/25

0.086

06/20

08-059-0005

Welch

0.102

07/10

0.090

06/20

0.088

08/05

0.088

08/29

0.087

07/18

08-059-0006

Rocky Flats - N

0.088

07/10

0.088

07/18

0.088

08/29

0.087

07/02

0.087

07/25

08-059-0011

NREL

0.097

08/29

0.093

07/10

0.092

08/05

0.092

08/24

0.088

06/02

08-069-0007

Rocky Mountain Natíl Park

0.092

07/09

0.090

07/31

0.090

08/28

0.085

05/22

0.084

05/25

08-069-0011

Ft. Collins - West

0.093

08/19

0.092

07/09

0.092

07/18

0.088

07/24

0.086

07/25

08-069-1004

Ft. Collins - CSU

0.082

08/19

0.080

07/09

0.079

08/30

0.078

07/24

0.076

07/18

08-077-0020

Palisade - Water

0.081

07/09

0.079

07/10

0.075

07/08

07/08

0.074

07/05

0.074

07/14

08-083-0006

Cortez

0.078

07/23

0.074

07/13

0.072

08/05

0.071

07/25

0.070

07/24

08-123-0009

Greeley - Weld Tower

0.094

08/20

0.092

07/24

0.089

08/01

0.087

08/04

0.087

08/08

 

NOTES: Values at or above the level of either the former 1-hour standard (0.125 ppm) or current 8-hour standard (0.075 ppm) are highlighted in yellow.

* Highland site shut down on 4/21/08 for approx. 6-months.

**Denver - Animal Shelter site commenced on 4/22/08, Rifle - Health on 6/20/08, Palisade - Water on 5/30/08 and Cortez on 6/17/08.

 


 

 

*** DRAFT DATA ***

 

2008††††††††† 8-Hour Ozone††††††††† (updated through September 30, 2008)

 

AQS Number

 

Site Name

1st Max

8-Hour

(ppm)

Date 1stMax

8-Hour

2nd Max

8-Hour

(ppm)

Date 2nd Max

8-Hour

3rd Max

8-Hour

(ppm)

Date 3rd Max

8-Hour

4th Max

8-Hour

(ppm)

Date 4th Max

8-Hour

5th Max

8-Hour

(ppm)

Date 5th Max

8-Hour

08-001-3001

Welby

0.085

07/10

0.083

08/29

0.077

07/18

0.076

06/20

0.075

07/13

08-005-0002

* Highland

0.062

04/04

0.060

04/08

0.060

04/18

0.059

04/05

0.059

04/19

08-013-0011

S. Boulder Creek

0.080

07/10

0.076

05/31

0.076

07/09

0.076

07/18

0.075

05/25

08-031-0014

Carriage

0.081

07/10

0.075

08/29

0.073

06/20

0.072

07/26

0.069

07/27

08-031-0025

** Denver - Animal Shelter

0.086

07/10

0.072

08/29

0.071

07/13

0.070

07/26

0.069

07/14

08-035-0004

Chatfield State Park

0.090

07/10

0.082

06/30

0.080

06/20

0.080

06/27

0.077

07/16

08-041-0013

Colo. Spgs. - Academy

0.078

05/24

0.077

07/10

0.073

08/06

0.070

07/18

0.069

07/28

08-041-0016

Manitou Springs

0.080

05/24

0.076

07/10

0.074

07/11

0.072

07/31

0.072

08/06

08-045-0012

Rifle - Health

0.076

07/09

0.076

07/10

0.069

08/19

0.066

07/13

0.065

08/18

08-059-0002

Arvada

0.081

08/29

0.080

07/10

0.077

06/20

0.074

08/05

0.073

07/15

08-059-0005

Welch

0.095

07/10

0.079

06/20

0.077

07/18

0.073

08/19

0.072

06/27

08-059-0006

Rocky Flats - N

0.083

07/10

0.080

07/18

0.079

05/31

0.079

08/29

0.077

06/30

08-059-0011

NREL

0.085

07/10

0.085

08/29

0.077

06/20

0.076

06/02

0.076

07/18

08-069-0007

Rocky Mountain Natíl Park

0.081

07/09

0.077

05/25

0.077

07/31

0.076

05/31

0.073

05/24

08-069-0011

Ft. Collins - West

0.081

07/18

0.079

07/09

0.078

05/25

0.076

07/24

0.076

08/19

08-069-1004

Ft. Collins - CSU

0.070

05/25

0.070

07/09

0.068

07/18

0.066

05/31

0.065

07/13

08-077-0020

Palisade - Water

0.077

07/09

0.075

07/10

0.070

05/31

0.070

07/29

0.069

08/18

08-083-0006

Cortez

0.067

08/02

0.066

07/23

0.065

08/07

0.064

08/05

0.063

07/25

08-123-0009

Greeley - Weld Tower

0.077

07/24

0.076

08/20

0.075

07/26

0.073

08/01

0.072

04/30

 

NOTES: Values at or above the level of either the former 1-hour standard (0.125 ppm) or current 8-hour standard (0.075 ppm) are highlighted in yellow.

* Highland site shut down on 4/21/08 for approx. 6-months.

**Denver - Animal Shelter site commenced on 4/22/08, Rifle - Health on 6/20/08, Palisade - Water on 5/30/08 and Cortez on 6/17/08.

 


 

The 8-hour ozone standard is written such that attainment is met if the 3-year average of the 4th maximum value from each of the 3 years is less than or equal to 0.075 ppm. Thus, by looking at the 4th maximum values from the previous 2 years, it is possible to see what the highest 4th maximum level for the current year could be and still remain in attainment of the standard.

 

This table provides information on the 4th maximum values for 2006 and 2007, the current 4th maximum value for 2008, the current 3-year average, and the maximum possible level for 2008 in order to remain in attainment of the new ozone standard.

3-Year Average 4th Maximum Ozone Values

 

 

 

Site Name

 

 

 

AQS #

2006

4th Maximum

8-Hour Average

Value (ppm)

2007

4th Maximum

8-Hour Average

Value (ppm)

2008 (thru 09/30)

4th Maximum

8-Hour Average

Value (ppm)

2006 - 2008

3-Year Average

4th Maximum

Value (ppm)

2008

Highest Allowable

4th Maximum

8-Hour Average

Value (ppm)

Welby

08-001-3001

0.069

0.070

0.076

0.071

0.088

* Highland

08-005-0002

0.081

0.075

0.059

0.071

0.071

S. Boulder Creek

08-013-0011

0.082

0.085

0.076

0.081

0.060

Carriage

08-031-0014

0.072

0.076

0.072

0.073

0.079

** Denver - Animal Shelter

08-031-0025

---

---

0.070

---

---

Chatfield State Park

08-035-0004

0.086

0.082

0.080

0.082

0.059

USAF Academy

08-041-0013

0.072

0.072

0.070

0.071

0.083

Manitou Springs

08-041-0016

0.076

0.072

0.072

0.073

0.079

Rifle - Health

08-045-0012

---

---

0.066

---

---

Arvada

08-059-0002

0.082

0.079

0.074

0.078

0.066

Welch

08-059-0005

0.081

0.080

0.073

0.078

0.066

Rocky Flats North

08-059-0006

0.090

0.090

0.079

0.086

0.047

NREL

08-059-0011

0.083

0.085

0.076

0.081

0.059

Rocky Mtn. Natíl Park

08-069-0007

0.076

0.078

0.076

0.076

0.073

Fort Collins - West

08-069-0011

0.087

0.085

0.076

0.082

0.055

Fort Collins - CSU

08-069-1004

0.078

0.069

0.066

0.071

0.080

Palisade - Water

08-077-0020

---

---

0.070

---

---

Cortez

08-083-0006

---

---

0.064

---

---

Greeley - Weld Tower

08-123-0009

0.082

0.074

0.073

0.076

0.071

NOTE: An area is considered to be in attainment of the National Ambient Air Quality Standard when the 3-year average of the annual 4th highest daily maximum 8-hour ozone concentration at a site is less than or equal to 0.075 ppm.

 

NOTES: Values above the level of the 3-year average 4th-maximum 8-hour standard are highlighted in red.

* * Highland site shut down on 4/21/08 for approx. 6-months.

**Denver - Animal Shelter site commenced on 4/22/08, Rifle - Health on 6/20/08, Palisade - Water on 5/30/08 and Cortez on 6/17/08.