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	Annual Toxics Summary San Francisco-Arkansas Street FAQs Indeno(1,2,3-cd)pyrene-10 nanograms per cubic meter

Read About Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
2005		0.025	*	*	*	0.30	0.127	5	0.05	*
2004		0.025	0.025	0.075	0.18	0.35	0.076	30	0.05	0.02
2003		0.025	0.06	0.094	0.21	0.32	0.091	31	0.05	0.03
2002		0.025	0.025	0.080	0.18	0.35	0.093	30	0.05	0.03
2001		0.025	0.05	0.118	0.29	0.85	0.194	31	0.05	0.04
2000		0.025	0.025	0.140	0.39	0.80	0.192	30	0.05	0.04
1999		0.025	0.10	0.192	0.75	1.2	0.293	30	0.05	0.06
1998		0.025	0.11	0.198	0.61	0.70	0.217	31	0.05	0.06
1997		0.025	0.06	0.135	0.37	0.70	0.166	30	0.05	0.04
1996		0.025	0.09	0.154	0.27	0.79	0.182	24	0.05	0.05
1995		0.025	0.15	0.211	0.36	0.72	0.174	24	0.05	0.07
1994		0.07	0.23	*	0.48	1.0	0.246	14	0.05	*
1993		0.06	0.22	0.391	0.98	1.3	0.378	24	0.05	0.1
1992		0.05	0.13	0.252	0.66	1.1	0.270	24	0.05	0.08
1991		0.025	0.17	0.319	0.85	1.0	0.312	24	0.05	0.1
1990		0.10	*	*	*	1.6	0.588	8	0.05	*
1989		*	*	*	*	*	*	0	*	*

	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. "*" means there was insufficient or no data available to determine the value.