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	Annual Toxics Summary Chula Vista 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	*	*	*	0.11	0.036	5	0.05	*
2004		0.025	0.025	0.065	0.15	0.44	0.084	31	0.05	0.2
2003		0.025	0.025	0.066	0.14	0.35	0.080	31	0.05	0.2
2002		0.025	0.025	0.054	0.11	0.26	0.055	30	0.05	0.2
2001		0.025	0.025	0.087	0.30	0.50	0.133	30	0.05	0.3
2000		0.025	0.025	0.095	0.23	0.37	0.107	29	0.05	0.3
1999		0.025	0.06	*	0.36	0.41	0.133	24	0.05	*
1998		0.025	0.025	0.088	0.18	1.0	0.184	30	0.05	0.3
1997		0.025	0.025	0.090	0.27	0.42	0.118	31	0.05	0.3
1996		0.025	0.025	0.080	0.19	0.48	0.112	24	0.05	0.3
1995		0.025	0.025	0.088	0.22	0.50	0.120	24	0.05	0.3
1994		0.025	0.16	*	0.53	0.63	0.207	14	0.05	*
1993		0.025	0.025	0.114	0.30	0.54	0.151	24	0.05	0.4
1992		0.025	0.025	0.108	0.28	0.86	0.185	24	0.05	0.3
1991		0.025	0.025	0.133	0.36	0.82	0.203	24	0.05	0.4
1990		0.025	0.08	*	0.52	0.92	0.244	22	0.05	*
1989		0.025	0.025	0.159	0.58	0.82	0.246	24	0.05	0.5

	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.