2002 Almanac (page 344) Table A-31 Great Basin Valleys - Alpine County - Air Quality Trends OZONE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 1-Hour Indicator National 1-Hr. Design Value Nat. 8-Hr. Design Value Maximum 1-Hr. Concentration Max. 8-Hr. Concentration Days Above State Standard Days Above Nat. 1-Hr. Std. Days Above Nat. 8-Hr. Std. PM10 (ug/m3) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Max. 24-Hour Concentration Max. Annual Geometric Mean Calc Days Above State 24-Hr Std Calc Days Above Nat 24-Hr Std CARBON MONOXIDE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 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) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 1-Hr. Indicator Max. 1-Hr. Concentration Max. Annual Average SULFUR DIOXIDE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 1-Hr. Indicator Max. 24-Hr. Concentration Max. Annual Average