Appendix A	North Coast Air Basin - County: Del Norte					Table A-55														

OZONE (ppm)	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
Peak 1-Hour Indicator				0.062	0.058	0.066	0.063	0.063	0.062	0.063	0.062									
Peak 8-Hour Indicator				0.053	0.05	0.061	0.059	0.059	0.056	0.056	0.054									
4th High 1-Hr. in 3 Yrs			0.039	0.059	0.059	0.06	0.06	0.06	0.06	0.06	0.06									
Avg. of 4th High 8-Hr. in 3 Yrs			0.035	0.043	0.042	0.053	0.051	0.051	0.05	0.051	0.049									
Maximum 1-Hr. Concentration			0.04	0.068	0.05	0.07	0.06	0.07	0.06	0.064	0.056									
Max. 8-Hr. Concentration			0.038	0.06	0.042	0.06	0.051	0.061	0.053	0.061	0.052									
Days Above State Standard			0	0	0	0	0	0	0	0	0									
Days Above Nat. 1-Hr. Std.			0	0	0	0	0	0	0	0	0									
Days Above Nat. 8-Hr. Std.			0	0	0	0	0	0	0	0	0									

PM10 (ug/m3)	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
Max. 24-Hr. Concentration (State)											41	42	58	50	42	46	48	39	37	44
Max. 24-Hr. Concentration (Nat)				46							41	42	58	48	39	44	46	39	39	42
Annual Average (State)													20.8		18.4	17.6	17.3			18.6
Annual Average (Nat)													20.9		17.3		16.9	18.7		17.9
Calc Days Above State 24-Hr Std													6		0	0	0			0
Calc Days Above Nat 24-Hr Std											0		0		0	0	0	0		0

PM2.5 (ug/m3)	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
Max. 24-Hr. Concentration (State)																				
Max. 24-Hr. Concentration (Nat)																				
98th Percentile of 24-Hr Conc.																				
Annual Average (State)																				
Avg. of Qtrly. Means (Nat)																				

CARBON MONOXIDE (ppm)	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
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)	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
Peak 1-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. Annual Average																				

SULFUR DIOXIDE (ppm)	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
Peak 1-Hr. Indicator																				
Max. Annual Average																				
Max. 24-Hr. Concentration