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	Annual Toxics Summary Fremont-Chapel Way FAQs Benzo(b)fluoranthene-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		0.05	*	*	*	0.25	0.101	5	0.05	*
2004		0.025	0.025	0.062	0.13	0.37	0.075	30	0.05	0.02
2003		0.025	0.025	0.073	0.12	0.42	0.088	31	0.05	0.02
2002		0.025	0.025	0.076	0.22	0.49	0.103	30	0.05	0.02
2001		0.025	0.025	0.118	0.31	0.69	0.177	31	0.05	0.04
2000		0.025	0.025	0.130	0.48	0.61	0.178	30	0.05	0.04
1999		0.025	0.08	0.151	0.44	0.68	0.174	30	0.05	0.05
1998		0.025	0.11	0.168	0.37	1.0	0.208	31	0.05	0.05
1997		0.025	0.06	0.113	0.20	0.78	0.163	30	0.05	0.04
1996		0.025	0.06	0.126	0.29	1.0	0.210	24	0.05	0.04
1995		0.025	0.12	0.168	0.35	0.53	0.144	24	0.05	0.05
1994		0.10	0.32	*	1.07	1.3	0.390	14	0.05	*
1993		0.025	0.13	0.409	1.27	1.7	0.510	24	0.05	0.1
1992		0.025	0.14	0.237	0.78	1.0	0.297	24	0.05	0.08
1991		0.025	0.15	0.332	0.83	2.0	0.495	24	0.05	0.1
1990		0.025	0.14	0.408	1.1	2.6	0.589	24	0.05	0.1
1989		0.025	0.12	*	1.14	2.2	0.623	19	0.05	*

	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.