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Table 10-2: <br /> STOCKTON AIR QUALITYDATA, <br /> r <br /> (1987-1991) <br /> Year No. of Days Above Standard at: <br /> Hazelton Claremont Mariposa <br /> Station Station Station <br /> Carbon Monoxide (8-hour) <br /> 1987 0 1 -- <br /> 1988 1 1 -- <br /> 1989 1 6 -- <br /> 1990 2 7 <br /> 1991 1 2 <br /> ozone (Federal 1-hour) <br /> 1987 0 -- 1 <br /> 1988 1 ®� 3 <br /> 1989 0 0 <br /> 1990 0 -- 1 <br /> 1991 0 _® 0 <br /> ozone (State 1-hour) <br /> 1987 10 53 <br /> 1988 18 29 <br /> 1989 3 -- 7 <br /> 1990 9 ®_ 16 <br /> 1991 10 22 <br /> pm-10 (State 24-hour) ®- -- <br /> 1987 22 <br /> 1988 20 <br /> 1989 18 __ <br /> -- -- <br /> 1990 22 <br /> 1991 21 -- -® <br /> r <br /> Note: -- = Not available. <br /> Source: California Air Resources Board 1988-1992 . <br /> r <br /> r - . <br /> 10-3 <br />