Appendix A Northeast Plateau Air Basin - County: Lassen Table A-60 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 Peak 8-Hour Indicator 4th High 1-Hr. in 3 Yrs Avg. of 4th High 8-Hr. in 3 Yrs 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) 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) 42 84 48 93 74 91 Max. 24-Hr. Concentration (Nat) 42 84 52 100 80 105 Annual Average (State) Annual Average (Nat) Calc Days Above State 24-Hr Std Calc Days Above Nat 24-Hr Std 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