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	Annual Toxics Summary Riverside-Rubidoux 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	*	*
2004		0.025	0.025	0.068	0.18	0.35	0.086	31	0.05	0.2
2003		0.025	0.025	0.079	0.18	0.50	0.099	31	0.05	0.3
2002		0.025	0.025	0.078	0.21	0.34	0.087	31	0.05	0.2
2001		0.025	0.025	0.082	0.25	0.37	0.107	30	0.05	0.3
2000		0.025	0.025	0.088	0.23	0.44	0.111	31	0.05	0.3
1999		0.025	0.025	0.074	0.18	0.47	0.101	30	0.05	0.2
1998		0.025	0.05	0.120	0.29	1.0	0.203	29	0.05	0.4
1997		0.025	0.025	*	0.23	0.49	0.116	29	0.05	*
1996		0.025	0.025	0.115	0.29	0.61	0.145	24	0.05	0.4
1995		0.025	0.07	*	0.35	0.36	0.123	20	0.05	*
1994		0.025	0.20	*	0.40	0.77	0.202	14	0.05	*
1993		0.025	0.08	0.180	0.51	1.0	0.245	24	0.05	0.6
1992		0.025	0.025	0.118	0.31	0.57	0.145	24	0.05	0.4
1991		0.025	0.025	0.135	0.39	0.50	0.154	24	0.05	0.4
1990		0.025	0.07	0.150	0.44	0.54	0.172	24	0.05	0.5
1989		0.025	0.07	0.209	0.72	1.4	0.353	25	0.05	0.7

	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.