CARBON MONOXIDE (ppm)	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999
Peak 8-Hr. Indicator	15.5	14.8	14	11.9	11.9	13.9	14	13.4	10.7	11.8	12.6	12.4	11.1	9.3	8.1	7.8	7.4	6.5	6.7	6.5
Max. 1-Hr. Concentration	27	16	18	17	20	21	20	17	15	19	18	15	12	14	12	10.1	8.8	10.7	8.7	9
Max. 8-Hr. Concentration	16.4	11	14.5	10.6	12.1	16.1	12.6	10	12.8	12	11	11	7.8	7.9	8.8	5.8	7	6.1	6.3	6.3
Days Above State 8-Hr. Std.	17	6	15	4	8	24	8	2	4	10	4	5	0	0	0	0	0	0	0	0
Days Above Nat. 8-Hr. Std.	13	4	12	4	7	21	8	1	4	9	2	4	0	0	0	0	0	0	0	0