OZONE (ppm) 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Peak 1-Hour Indicator National 1-Hr. Design Value Nat. 8-Hr. Design Value Maximum 1-Hr. Concentration NO MONITORING DATA AVAILABLE Max. 8-Hr. Concentration Days Above State Standard Days Above Nat. 1-Hr. Std. Days Above Nat. 8-Hr. Std. PM10 (ug/m3) 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Max. 24-Hour Concentration 24 50 Max. Annual Geometric Mean Calc Days Above State 24-Hr Std 0 0 Calc Days Above Nat 24-Hr Std 0 0 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 3.9 3.9 3.9 Max. 1-Hr. Concentration 11.0 15.0 13.0 9.0 11.6 9.5 Max. 8-Hr. Concentration 7.9 8.5 7.3 4.3 4.7 2.9 Days Above Lake Tahoe 8-Hr. Std. 2 7 2 0 0 0 Days Above Nat. 8-Hr. Std. 0 0 0 0 0 0 NITROGEN DIOXIDE (ppm) 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Peak 1-Hr. Indicator Max. 1-Hr. Concentration NO MONITORING DATA AVAILABLE Max. Annual Average SULFUR DIOXIDE (ppm) 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Peak 1-Hr. Indicator Max. 24-Hr. Concentration NO MONITORING DATA AVAILABLE Max. Annual Average