Appendix A	Mountain Counties Air Basin - County: Placer					Table A-46														

OZONE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 1-Hour Indicator							0.155	0.134	0.134	0.109	0.12	0.119	0.118	0.119	0.116	0.111	0.106	0.111	0.114	
4th High 1-Hr in 3 Yrs							0.14	0.14	0.14	0.1	0.11	0.11	0.12	0.119	0.117	0.109	0.103	0.105	0.115	
Avg of 4th Hi 8-Hr in 3 Yrs							0.108	0.102	0.089	0.063	0.092	0.092	0.092	0.092	0.091	0.086	0.086	0.086	0.089	
Maximum 1-Hr. Concentration							0.16	0.12	0.09	0.06	0.13	0.12	0.122	0.13	0.108	0.103	0.132	0.159	0.119	
Max. 8-Hr. Concentration							0.138	0.101	0.078	0.035	0.098	0.097	0.107	0.1	0.091	0.097	0.108	0.093	0.095	
Days Above State Standard							39	24	0	0	17	9	15	16	4	2	11	9	10	
Days Above Nat. 1-Hr. Std.							7	0	0	0	1	0	0	1	0	0	1	1	0	
Days Above Nat. 8-Hr. Std.							35	22	0	0	12	4	12	11	5	2	8	9	5	

PM10 (ug/m3)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Max. 24-Hour Concentration														86	60	74				
Max. Avg. of Quarters															22	21.2				
Calc Days Above State 24-Hr Std														18	6	32				
Calc Days Above Nat 24-Hr Std															0	0				

CARBON MONOXIDE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 8-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. 8-Hr. Concentration																				
Days Above State 8-Hr. Std.																				
Days Above Nat. 8-Hr. Std.																				

NITROGEN DIOXIDE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 1-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. Annual Average																				

SULFUR DIOXIDE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 1-Hr. Indicator																				
Max. 24-Hr. Concentration																				
Max. Annual Average																				

Portions of Placer County lie within the Lake Tahoe and Sacramento Valley Air Basins