3.12 Air Quality
Table 3.12-3
Ozone Number of Days Exceeding Federal and State Standards
San Diego County - 1994-1998
Number of Days
Number of Days
Number of Days
Exceeding Federal 1-Hour Standard
Exceeding State 1-Hour Standard
Exceeding Federal 8-Hour Standard
Station
Concentration >12 pphm
Concentration >9 pphm
Concentration >8 pphm
1998
1997
1996
1995
1994
1998
1997
1996
1995
1994
1998
1997
1996
1995
1994
Basinwide
9
1
2
12
9
54
43
51
96
79
35
16
31
48
46
Camp Pendleton
0
0
9
6
5
3
Oceanside
0
0
0
0
0
3
6
4
5
2
1
0
3
0
1
Del Mar
0
0
0
0
0
1
4
2
12
4
0
2
2
3
1
Chula Vista
0
0
0
1
0
2
10
1
7
4
0
3
0
1
0
Source: San Diego APCD 1999, CARB 1999
Camp Pendleton station not operating prior to 1997.
Table 3.12-4
PM 10 Samples Exceeding Federal and State Standards
San Diego County - 1994-1998
Percent of Samples
Percent of Samples
Exceed Annual
above Federal 24 hour
above State 24 hour
Standard?
Station
standard of 150 : g/m3
standard of 50 : g/m3
:
:
1998
1997
1996
1995
1994
1998
1997
1996
1995
1994
Federal
State
Basinwide
0
0
0
0
0
NA
26
18
27
29
N
Y(1)
Oceanside
0
0
0
0
0
0
0
2
7
4
N
N
Chula Vista
0
0
0
0
0
0
3
3
8
3
N
N
Sources: San Diego APCD, 1999, CARB 1999
NA - Data not available.
The state annual standard was exceeded each year 1994-1998 at the Otay Mesa station. The standard was not exceeded at any other station during the 5-year period.
(1)
Page 3.12-6
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