*** DRAFT DATA ***

2008 1-Hour Ozone (updated through June 30, 2008 [Rocky Mtn. NP through 04/30])

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	0.089	06/20	0.079	06/02	0.079	06/20	0.078	05/31	0.078	06/30
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	0.085	05/31	0.082	06/30	0.081	06/01	0.079	06/02	0.078	05/25
08-031-0014	Carriage	0.085	06/20	0.073	05/23	0.072	06/01	0.071	05/31	0.070	05/22
08-031-0025	** Denver Animal Shelter	0.088	06/20	0.076	06/01	0.075	05/29	0.075	06/28	0.073	05/23
08-035-0004	Chatfield State Park	0.099	06/20	0.090	06/30	0.089	06/27	0.086	06/29	0.080	06/23
08-041-0013	Colo. Spgs. - Academy	0.085	05/24	0.075	06/30	0.074	05/29	0.074	06/10	0.073	05/23
08-041-0016	Manitou Springs	0.087	05/24	0.076	06/10	0.075	06/11	0.074	05/23	0.074	05/29
08-059-0002	Arvada	0.086	06/20	0.079	06/02	0.079	06/27	0.078	05/31	0.078	06/16
08-059-0005	Welch	0.090	06/20	0.084	06/30	0.083	06/02	0.083	06/27	0.081	06/01
08-059-0006	Rocky Flats - N	0.085	05/31	0.083	06/30	0.082	06/02	0.080	06/01	0.080	06/20
08-059-0011	NREL	0.088	06/02	0.086	06/16	0.086	06/20	0.084	06/30	0.082	06/01
08-069-0007	Rocky Mountain Nat’l Park	0.074	04/16	0.069	04/22	0.068	04/27	0.068	04/30	0.067	02/16
08-069-0011	Ft. Collins - West	0.106	05/06	0.104	05/12	0.089	05/10	0.084	06/30	0.082	05/25
08-069-1004	Ft. Collins - CSU	0.075	05/31	0.074	05/25	0.072	06/02	0.069	05/05	0.069	06/01
08-123-0009	Greeley - Weld Tower	0.077	05/31	0.076	05/30	0.076	06/30	0.075	05/25	0.074	05/04

2008 8-Hour Ozone (updated through June 30, 2008 [Rocky Mtn. NP through 04/30])

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	0.078	06/20	0.072	05/31	0.071	06/02	0.070	06/30	0.068	06/27
08-005-0002	* Highland	0.062	04/04	0.060	04/08	0.060	04/18	0.059	04/19	0.058	04/20
08-013-0011	S. Boulder Creek	0.076	05/31	0.075	05/25	0.071	05/29	0.071	06/01	0.071	06/20
08-031-0014	Carriage	0.073	06/20	0.067	05/31	0.065	05/22	0.065	05/25	0.064	05/11
08-031-0025	** Denver Animal Shelter	0.068	05/31	0.068	06/20	0.067	06/13	0.067	06/14	0.067	06/28
08-035-0004	Chatfield State Park	0.083	06/30	0.081	06/20	0.081	06/27	0.071	06/10	0.071	06/13
08-041-0013	Colo. Spgs. - Academy	0.078	05/24	0.068	06/10	0.067	05/23	0.067	06/27	0.066	05/29
08-041-0016	Manitou Springs	0.080	05/24	0.071	06/10	0.069	05/23	0.067	05/22	0.067	06/11
08-059-0002	Arvada	0.077	06/20	0.072	05/31	0.072	06/16	0.071	06/02	0.071	06/27
08-059-0005	Welch	0.079	06/20	0.072	06/27	0.071	06/30	0.070	05/31	0.070	06/02
08-059-0006	Rocky Flats - N	0.079	05/31	0.077	06/30	0.076	06/02	0.075	05/25	0.074	06/27
08-059-0011	NREL	0.077	06/20	0.076	06/02	0.074	05/31	0.074	06/16	0.074	06/30
08-069-0007	Rocky Mountain Nat’l Park	0.065	04/22	0.065	04/30	0.064	04/15	0.063	04/27	0.063	04/21
08-069-0011	Ft. Collins - West	0.079	05/25	0.076	06/30	0.074	05/31	0.074	06/01	0.072	05/05
08-069-1004	Ft. Collins - CSU	0.071	05/25	0.067	05/31	0.064	05/29	0.064	06/01	0.063	05/05
08-123-0009	Greeley - Weld Tower	0.073	05/31	0.072	04/30	0.070	05/04	0.070	05/25	0.070	06/30

NOTE: 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.

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 06/30) 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	0.070	0.069	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	0.071	0.079	0.060
Carriage	08-031-0014	0.072	0.076	0.065	0.071	0.079
** Denver Animal Shelter	08-031-0025	---	---	0.067	---	---
Chatfield State Park	08-035-0004	0.086	0.082	0.071	0.079	0.059
USAF Academy	08-041-0013	0.072	0.072	0.067	0.070	0.083
Manitou Springs	08-041-0016	0.076	0.072	0.067	0.071	0.079
Arvada	08-059-0002	0.082	0.079	0.071	0.077	0.066
Welch	08-059-0005	0.081	0.080	0.070	0.077	0.066
Rocky Flats North	08-059-0006	0.090	0.090	0.075	0.085	0.047
NREL	08-059-0011	0.083	0.085	0.074	0.080	0.059
Rocky Mtn. Nat’l Park	08-069-0007	0.076	0.078	0.063 (thru 4/30)	0.072	0.073
Fort Collins – West	08-069-0011	0.087	0.085	0.074	0.082	0.055
Fort Collins – CSU	08-069-1004	0.078	0.069	0.064	0.070	0.080
Greeley – Weld Tower	08-123-0009	0.082	0.074	0.070	0.075	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.

NOTE: 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.