LADCO O3 Planning Unified Schedule

	A	B	C	D	E	H	K	N	R	U	X	AA	AE	AH	AK	AN
1		Description	Planned Date(s)	Status	2021				2022				2023
2		Description	Planned Date(s)	Status	Q1	Q2	Q3	Q4	Q1	Q2	Q3	Q4	Q1	Q2	Q3	Q4
3	2008 O3 NAAQS (serious)
4	EPA Actions & State Deadlines	Attainment date	7/20/2021	7/20/2021
5		Reclassification (est.)	1/2022
6		SIPs due (est.)	1/2023
7	LADCO Actions (Model future year: 2026)	2016 model improvements	12/20 - 12/21	Completed
8		Future year modeling	10/21-3/22
9		Attainment testing	4/2022
10		Modeling TSD development	6/22-11/22
11	2015 O3 NAAQS (marginal)
12	EPA Actions & State Deadlines	Attainment date	8/3/2021	8/3/2021
13		Reclassification (est.)	2/2022
14		SIPs due (est.)	2/2023
15	LADCO Actions (Model future year: 2023)	2016 model improvements	12/20 - 12/21	Completed
16		Initial future year modeling	5/21 - 6/22	6/21 - 8/21
17		Initial attainment testing	10/2021	8/2021
18		Scenario modeling & attain. tests	10/21 - 6/22
19		Modeling TSD development	6/22-11/22
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21	Notes:
22	No scenario modeling is planned for the 2008 NAAQS because LADCO assumes the model will project that the Chicago area will meet the less stringent NAAQS by the more distant (2026) deadline.
23	This schedule will provide states with a final TSD roughly two months prior to their required SIP submission deadline.
24	See next sheet for the logic behind the estimated EPA reclassification and SIP due dates
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