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	Annual Toxics Summary San Francisco-Arkansas Street FAQs Benzo(g,h,i)perylene-10 nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2005		0.13	*	*	*	0.63	0.227	5	0.05
2004		0.025	0.13	0.168	0.35	0.61	0.154	30	0.05
2003		0.025	0.12	0.217	0.51	0.71	0.185	31	0.05
2002		0.025	0.09	0.144	0.30	0.66	0.153	30	0.05
2001		0.025	0.11	0.211	0.71	1.0	0.273	31	0.05
2000		0.025	0.11	0.278	0.68	1.5	0.336	30	0.05
1999		0.06	0.21	0.334	0.63	1.5	0.344	30	0.05
1998		0.025	0.25	0.431	1.2	1.8	0.449	31	0.05
1997		0.025	0.16	0.308	0.88	1.3	0.345	30	0.05
1996		0.05	0.24	0.328	0.59	1.6	0.370	24	0.05
1995		0.08	0.31	0.423	0.78	1.2	0.301	24	0.05
1994		0.20	0.50	*	1.07	1.2	0.339	14	0.05
1993		0.14	0.53	0.786	1.87	2.0	0.662	24	0.05
1992		0.08	0.27	0.604	1.78	2.1	0.650	24	0.05
1991		0.08	0.36	0.635	1.64	2.3	0.644	24	0.05
1990		0.13	*	*	*	2.3	0.830	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.