Annual Benzene Summary for San Francisco-Arkansas Street

California Home

ARB:

AQD:


	Annual Toxics Summary
	San Francisco-Arkansas Street
	Benzene
	parts per billion

Year

Months
Present

Minimum

Median

90th
Percentile

Maximum

Standard
Deviation

Number of
Observations

Detection
Limit

Estimated
Risk

2002

0.16

0.48

0.87

1.2

0.29

16

0.05

2001

0.12

0.3

0.376

0.63

1.3

0.285

30

0.05

35

2000

0.1

0.4

0.48

0.9

1.8

0.38

29

0.2

45

1999

0.2

0.5

0.65

1.4

2.2

0.52

26

0.2

61

1998

0.1

0.5

0.63

1.2

2.3

0.54

31

0.2

59

1997

0.1

0.5

0.51

1.0

2.3

0.50

30

0.2

48

1996

0.25

0.25

0.53

1.5

1.9

0.55

31

0.5

49

1995

0.25

0.9

0.95

2.0

3.1

0.78

29

0.5

88

1994

0.25

1.0

1.07

2.4

2.8

0.87

29

0.5

99

1993

0.25

1.0

2.6

3.7

0.98

27

0.5

1992

0.25

1.2

1.25

2.2

2.8

0.76

31

0.5

116

1991

0.25

1.4

1.49

2.8

4.5

1.05

26

0.5

138

1990

0.25

2.2

2.8

3.8

0.88

27

0.5

1989

0.25

2.0

2.44

5.0

6.9

1.79

23

0.5

226



	Notes:	Values below the Limit of Detection (LoD) assumed to be ½ LoD. Means and risks shown only for years with data in all 12 months. Risks shown only for those substances with unit risk factors.