Chapter 4 San Joaquin Valley Air Basin PM10 Air Quality Table Table 4-24 PM10 (ug/m3) 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Max. 24-Hour Concentration 244 250 439 279 183 239 190 279 153 199 160 183 145 205 Max. Avg. of Quarters 70.8 79.3 79.3 74.3 62.9 56.3 50.1 58.2 54.1 48.2 39.9 59.5 53.1 57.4 Calc Days Above State 24-Hr Std 300 302 313 285 273 233 253 246 225 188 185 216 237 236 Calc Days Above Nat 24-Hr Std 40 40 56 40 3 11 8 8 0 3 6 12 0 12