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Table 4.7.2 <br />STOCKTON AIR QUALITY DATA <br />(1988-1992) <br />Year No. of Days Above Standard at: <br />Hazelton Claremont Mariposa <br />Station Station Station <br />Carbon Monoxide (8 -hour) <br />1988 1 1 -- <br />1989 1 6 -- <br />1990 2 7 -- <br />1991 1 2 -- <br />1992 0 0 -- <br />Ozone (Federal 1 -hour) <br />1988 <br />1 — <br />3 <br />1989 <br />0 — <br />0 <br />1990 <br />0 -- <br />1 <br />1991 <br />0 — <br />0 <br />1992 <br />0 — <br />0 <br />Ozone (State 1 -hour) <br />1988 <br />18 <br />— 29 <br />1989 <br />3 -- <br />7 <br />1990 <br />9 <br />— 16 <br />1991 <br />10 <br />— 22 <br />1992 <br />7 <br />— 18 <br />PM -10 (State 24-hour) <br />1988 <br />20 <br />— -- <br />1989 <br />18 <br />— — <br />1990 <br />22 <br />— — <br />1991 <br />21 <br />— — <br />1992 <br />18 <br />— — <br />Note: — = Not measured. <br />Source: California Air Resources Board 1989-1993. <br />ER -93-1 - 86 - <br />(9-27-93) <br />