Appendix A	North Coast Air Basin - County: Humboldt					Table A-54														

OZONE (ppm)	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Peak 1-Hour Indicator								0.049	0.049											
Peak 8-Hour Indicator								0.041	0.041											
4th High 1-Hr. in 3 Yrs							0.03	0.04	0.04											
Avg. of 4th High 8-Hr. in 3 Yrs							0.03	0.035	0.034											
Maximum 1-Hr. Concentration							0.04	0.05	0.04											
Max. 8-Hr. Concentration							0.031	0.042	0.04											
Days Above State Standard							0	0	0											
Days Above Nat. 1-Hr. Std.							0	0	0											
Days Above Nat. 8-Hr. Std.							0	0	0											

PM10 (ug/m3)	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Max. 24-Hr. Concentration (State)					98	92	83				77	68	87	56	45	60	53	67	38	71
Max. 24-Hr. Concentration (Nat)					98	92	83				77	68	87	56	43	57	51	64	36	68
Annual Average (State)						31.4	28				24.3		19	21	15.9	19.9	21.8	21.3		
Annual Average (Nat)					36.2	31.4	28				24.3	19.9	18.4	21.2	14.8	19.2	20.9	20.8	18.5	
Calc Days Above State 24-Hr Std						35	29				12		12	6	0	13	6	13		
Calc Days Above Nat 24-Hr Std					0	0	0				0	0	0	0	0	0	0	0	0	

PM2.5 (ug/m3)	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Max. 24-Hr. Concentration (State)																36.9	24	32.6	23.7	36.1
Max. 24-Hr. Concentration (Nat)																36.9	24	32.6	23.7	36.1
98th Percentile of 24-Hr Conc.																27.7	21.5	29	22.6	
Annual Average (State)																9.1		9.4		
Avg. of Qtrly. Means (Nat)																9.1	9.1	9.4	7.9	

CARBON MONOXIDE (ppm)	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Peak 8-Hr. Indicator						4.6	4.6													
Max. 1-Hr. Concentration						10	9													
Max. 8-Hr. Concentration						4.5	3.5													
Days Above State 8-Hr. Std.						0	0													
Days Above Nat. 8-Hr. Std.						0	0													

NITROGEN DIOXIDE (ppm)	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Peak 1-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. Annual Average																				

SULFUR DIOXIDE (ppm)	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Peak 1-Hr. Indicator																				
Max. Annual Average																				
Max. 24-Hr. Concentration