BAY AREA AIR QUALITY MANAGEMENT DISTRICT

REGULATION 4 - AIR POLLUTION EPISODE PLAN

INDEX

4-100 GENERAL

4-300 STANDARDS

4-400 ADMINISTRATIVE REQUIREMENTS

4-500 MONITORING AND RECORDS (Not Included)

4-600 MANUAL OF PROCEDURES (Not Included)






REGULATION 4

AIR POLLUTION EPISODE PLAN

4-100 GENERAL

4-300 STANDARDS

4-400 ADMINISTRATIVE REQUIREMENTS


REGULATION 4

TABLE 1

EPISODE STAGE CRITERIA

Contaminant Averaging Time Health Advisory Stage 1

Alert
Stage II

Warning
Stage III

Emergency
Ozone 1hr. 0.15 ppm   0.20 ppm 0.35 ppm 0.50 ppm
Ozone in combination with sulfur dioxide   1 hr.   0.20 ppm* 0.35 ppm* 0.50 ppm*
Carbon Monoxide   1 hr.   40 ppm 75 ppm 100 ppm
  4 hrs.

8 hrs
    25 ppm

15 ppm
45 ppm

30 ppm
60 ppm

40 ppm
Sulfur Dioxide   1 hr.

24 hrs.
  0.5 ppm

0.2 ppm
1.0 ppm

0.7 ppm
2.0 ppm

0.9 ppm
PM10   24 hrs.   350 ug/m3 420 ug/m3 500 ug/m3
Sulfate in combination with oxidant   24 hrs. (sulfate 1hr. ozone)     25 ug/m3

0.20 ppm
 

(Amended March 20, 1991)

* These levels shall apply when the ozone concentration and the sulfur dioxide concentration each exceed 0.10 ppm, one hour average, and shall be determined by adding the ozone and sulfur dioxide concentrations.

If excessive concentrations of pollutants for which criteria have not been established occur or are predicted to occur, appropriate abatement actions shall be taken by the affected APCO after consultation with the ARB. (Amended March 20, 1991)