*** DRAFT DATA ***

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

AQS Number	Site Name	1st Max 1-Hour (ppm)	Date 1st Max 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 Nat’l 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 1st Max 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 Nat’l 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 4^th maximum value from each of the 3 years is less than or equal to 0.075 ppm. Thus, by looking at the 4^th maximum values from the previous 2 years, it is possible to see what the highest 4^th maximum level for the current year could be and still remain in attainment of the standard. This table provides information on the 4^th maximum values for 2006 and 2007, the current 4^th 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 4^th Maximum Ozone Values
Site Name	AQS #	2006 4^th Maximum 8-Hour Average Value (ppm)	2007 4^th Maximum 8-Hour Average Value (ppm)	2008 (thru 09/30) 4^th Maximum 8-Hour Average Value (ppm)	2006 - 2008 3-Year Average 4^th Maximum Value (ppm)	2008 Highest Allowable 4^th 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. Nat’l 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 4^th-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.