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	Annual Toxics Summary Chico-Manzanita Avenue FAQs Indeno(1,2,3-cd)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		0.27	*	*	*	2.7	1.02	5	0.05	*
2004		0.025	0.025	0.544	2.14	3.0	0.882	30	0.05	0.2
2003		0.025	0.14	0.400	1.3	2.3	0.612	31	0.05	0.1
2002		0.025	0.025	0.465	1.22	3.2	0.740	30	0.05	0.1
2001		0.025	0.16	0.581	1.3	6.2	1.25	31	0.05	0.2
2000		0.025	0.07	0.466	1.56	3.4	0.827	30	0.05	0.1
1999		0.025	0.15	0.508	1.82	3.9	0.881	30	0.05	0.2
1998		0.025	0.12	0.389	1.2	3.2	0.748	31	0.05	0.1
1997		0.025	0.10	0.672	1.43	5.4	1.23	30	0.05	0.2
1996		0.025	0.11	0.404	1.07	2.0	0.546	24	0.05	0.1
1995		0.025	0.17	0.499	1.27	2.4	0.605	24	0.05	0.2
1994		0.15	0.76	*	1.9	2.8	0.771	14	0.05	*
1993		0.025	0.15	0.794	2.44	3.5	1.05	24	0.05	0.3
1992		0.025	0.16	*	3.59	5.1	1.71	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.