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	Annual Toxics Summary Chico-Manzanita Avenue 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		0.27	*	*	*	3.6	1.42	5	0.05	*
2004		0.025	0.025	0.586	2.7	3.4	1.03	30	0.05	2
2003		0.025	0.07	0.416	1.8	3.1	0.781	31	0.05	1
2002		0.025	0.025	0.494	1.37	3.6	0.855	30	0.05	2
2001		0.025	0.08	0.625	1.7	8.8	1.69	31	0.05	2
2000		0.025	0.025	0.455	1.76	3.9	0.923	30	0.05	1
1999		0.025	0.08	0.436	1.55	4.0	0.897	30	0.05	1
1998		0.025	0.07	0.343	1.1	2.6	0.745	31	0.05	1
1997		0.025	0.06	0.688	1.35	6.9	1.45	30	0.05	2
1996		0.025	0.06	0.385	1.26	2.4	0.652	24	0.05	1
1995		0.025	0.07	0.490	1.47	3.1	0.768	24	0.05	2
1994		0.07	0.64	*	2.37	3.2	0.996	14	0.05	*
1993		0.025	0.09	0.881	3.07	4.6	1.40	24	0.05	3
1992		0.025	0.06	*	3.76	6.1	1.99	12	0.05	*
1991		*	*	*	*	*	*	0	*	*
1990		*	*	*	*	*	*	0	*	*
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.