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	Annual Toxics Summary Fremont-Chapel Way FAQs Benzo(a)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	*	*	*	0.24	0.095	5	0.05	*
2004		0.025	0.025	0.054	0.11	0.42	0.080	30	0.05	0.2
2003		0.025	0.025	0.071	0.10	0.48	0.105	31	0.05	0.2
2002		0.025	0.025	0.063	0.14	0.44	0.086	30	0.05	0.2
2001		0.025	0.025	0.097	0.26	0.64	0.163	31	0.05	0.3
2000		0.025	0.025	0.108	0.37	0.57	0.152	30	0.05	0.3
1999		0.025	0.025	0.125	0.38	0.80	0.179	30	0.05	0.4
1998		0.025	0.07	0.154	0.39	1.1	0.227	31	0.05	0.5
1997		0.025	0.025	0.096	0.14	0.70	0.153	30	0.05	0.3
1996		0.025	0.025	0.130	0.23	1.3	0.278	24	0.05	0.4
1995		0.025	0.09	0.140	0.33	0.60	0.156	24	0.05	0.4
1994		0.05	0.25	*	1.21	1.3	0.446	14	0.05	*
1993		0.025	0.12	0.353	1.1	1.7	0.478	24	0.05	1
1992		0.025	0.08	0.197	0.69	1.0	0.289	24	0.05	0.6
1991		0.025	0.08	0.293	0.80	2.0	0.527	24	0.05	0.9
1990		0.025	0.08	0.316	0.86	1.7	0.422	24	0.05	1
1989		0.025	0.025	*	0.85	1.8	0.521	20	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.