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	Annual Toxics Summary Chico-Manzanita Avenue 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		0.32	*	*	*	3.0	1.13	5	0.05	*
2004		0.025	0.025	0.603	2.45	3.8	1.06	30	0.05	0.2
2003		0.025	0.11	0.412	1.4	2.5	0.661	31	0.05	0.1
2002		0.025	0.025	0.516	1.57	3.3	0.845	30	0.05	0.2
2001		0.025	0.15	0.604	1.7	7.6	1.46	31	0.05	0.2
2000		0.025	0.025	0.490	1.68	3.9	0.929	30	0.05	0.2
1999		0.025	0.12	0.492	1.91	3.8	0.880	30	0.05	0.2
1998		0.025	0.07	0.344	1.2	2.3	0.668	31	0.05	0.1
1997		0.025	0.07	0.724	1.72	6.3	1.41	30	0.05	0.2
1996		0.025	0.10	0.404	1.31	2.0	0.563	24	0.05	0.1
1995		0.025	0.18	0.512	1.51	3.1	0.738	24	0.05	0.2
1994		0.12	0.73	*	2.69	3.0	0.981	14	0.05	*
1993		0.025	0.15	0.878	2.57	4.0	1.21	24	0.05	0.3
1992		0.025	0.12	*	3.88	6.6	2.11	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.