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	Annual Toxics Summary Richmond-13th Street 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	*	*
2003		*	*	*	*	*	*	0	*	*
2002		*	*	*	*	*	*	0	*	*
2001		*	*	*	*	*	*	0	*	*
2000		*	*	*	*	*	*	0	*	*
1999		*	*	*	*	*	*	0	*	*
1998		*	*	*	*	*	*	0	*	*
1997		0.025	*	*	*	0.88	0.261	10	0.05	*
1996		0.025	0.025	0.109	0.19	1.0	0.217	24	0.05	0.3
1995		0.025	0.05	0.111	0.27	0.44	0.115	24	0.05	0.4
1994		0.025	0.19	*	0.64	1.4	0.373	14	0.05	*
1993		0.025	0.11	0.298	0.84	1.6	0.423	24	0.05	0.9
1992		0.025	0.08	0.236	0.80	1.0	0.326	24	0.05	0.7
1991		0.025	0.025	0.162	0.53	1.5	0.334	24	0.05	0.5
1990		0.025	0.07	0.222	0.31	1.5	0.349	23	0.05	0.7
1989		0.025	0.025	*	0.66	1.5	0.389	19	0.05	*

	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.