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	Annual Toxics Summary Chico-Manzanita Avenue FAQs Benzo(k)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		0.15	*	*	*	1.3	0.511	5	0.05	*
2004		0.025	0.025	0.267	1.03	1.6	0.448	30	0.05	0.08
2003		0.025	0.025	0.192	0.70	1.2	0.315	31	0.05	0.06
2002		0.025	0.025	0.230	0.67	1.4	0.358	30	0.05	0.07
2001		0.025	0.05	0.275	0.74	3.4	0.656	31	0.05	0.09
2000		0.025	0.025	0.209	0.69	1.7	0.390	30	0.05	0.07
1999		0.025	0.025	0.212	0.78	1.7	0.387	30	0.05	0.07
1998		0.025	0.025	0.150	0.47	1.0	0.287	31	0.05	0.05
1997		0.025	0.025	0.295	0.64	2.7	0.573	30	0.05	0.09
1996		0.025	0.025	0.161	0.51	0.87	0.226	24	0.05	0.05
1995		0.025	0.06	0.225	0.66	1.3	0.320	24	0.05	0.07
1994		0.05	0.29	*	1.07	1.2	0.398	14	0.05	*
1993		0.025	0.07	0.401	1.2	1.9	0.579	24	0.05	0.1
1992		0.025	0.025	*	1.75	2.9	0.932	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.