July 3–17, 2019
190 ug/m3
Action level
Regulations require refineries to take corrective action if average annual benzene readings top 9 ug/m3.
200
150
100
Monitor station
9
ST1
0
Jan. 30
2018
July 3
2019
Sept. 11
A single high emission doesn’t trigger the action, but the series of high emissions from the refinery put the facility over the edge.
ST2
ST4
ST5
ST6
ST7
ST8
ST10
ST11
ST12
ST13
ST14
ST16
ST18
ST17
ST20
ST21
ST22
ST23
ST24
ST25
ST26
ST27
ST28
ST32
ST31
ST33
ST34
ST35
ST36
ST37
July 3–17, 2019
190 ug/m3
Action level
Regulations require refineries to take corrective action if average annual benzene readings top 9 ug/m3.
200
150
100
Monitor station
9
ST1
0
Jan. 30
2018
July 3
2019
Sept. 11
A single high emission doesn’t trigger the action, but the series of high emissions from the refinery put the facility over the edge.
ST2
ST4
ST5
ST6
ST7
ST8
ST10
ST11
ST12
ST13
ST14
ST16
ST18
ST17
ST20
ST21
ST22
ST23
ST24
ST25
ST26
ST27
ST28
ST32
ST31
ST33
ST34
ST35
ST36
ST37
July 3–17, 2019
190 ug/m3
Benzene level
Benzene emission data submitted to the EPA by the refineries quarterly, in micrograms per cubic meter of air.
Action level
200
Regulations require refineries to take corrective action if average annual benzene readings top 9 ug/m3.
150
100
Monitor station
9
ST1
0
Jan. 30
2018
July 3
2019
Sept. 11
ST2
ST4
ST5
ST6
ST7
ST8
ST10
ST11
ST12
ST13
A single high emission doesn’t trigger the action, but the series of high emissions from the refinery put the facility over the edge.
ST14
ST16
ST18
ST17
ST20
ST21
ST22
ST23
ST24
ST25
ST26
ST27
ST28
ST32
ST31
ST33
ST34
ST35
ST36
ST37
Benzene level
July 3–17, 2019
190 ug/m3
Benzene emission data submitted to the EPA by the refineries quarterly, in micrograms per cubic meter of air.
Action level
200
Regulations require refineries to take corrective action if average annual benzene readings top 9 ug/m3.
150
100
Monitor station
9
ST1
0
Jan. 30
2018
July 3
2019
Sept. 11
ST2
ST4
ST5
ST6
ST7
ST8
ST10
ST11
ST12
ST13
A single high emission doesn’t trigger the action, but the series of high emissions from the refinery put the facility over the edge.
ST14
ST16
ST18
ST17
ST20
ST21
ST22
ST23
ST24
ST25
ST26
ST27
ST28
ST32
ST31
ST33
ST34
ST35
ST36
ST37