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	Annual Toxics Summary Chico-Manzanita Avenue FAQs Benzo(g,h,i)perylene-10 nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2005		0.26	*	*	*	2.6	1.01	5	0.05
2004		0.025	0.12	0.836	2.92	6.4	1.50	30	0.05
2003		0.025	0.17	0.459	1.7	2.9	0.692	31	0.05
2002		0.025	0.09	0.562	2.04	3.3	0.885	30	0.05
2001		0.025	0.18	0.778	1.8	8.2	1.70	31	0.05
2000		0.025	0.11	0.529	1.83	3.6	0.876	30	0.05
1999		0.025	0.24	0.569	1.91	3.9	0.890	30	0.05
1998		0.025	0.13	0.464	1.3	2.6	0.772	31	0.05
1997		0.025	0.19	0.951	2.43	7.2	1.63	30	0.05
1996		0.025	0.21	0.523	1.21	2.7	0.673	24	0.05
1995		0.025	0.34	0.772	1.95	3.4	0.867	24	0.05
1994		0.25	1.25	*	2.68	4.1	1.10	14	0.05
1993		0.06	0.38	1.27	3.34	5.4	1.55	24	0.05
1992		0.025	0.24	*	2.89	5.4	1.64	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.