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	Annual Toxics Summary Chico-Manzanita Avenue FAQs Tin nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		*	*	*	*	*	*	0	*
2019		*	*	*	*	*	*	0	*
2018		*	*	*	*	*	*	0	*
2017		*	*	*	*	*	*	0	*
2016		*	*	*	*	*	*	0	*
2015		*	*	*	*	*	*	0	*
2014		*	*	*	*	*	*	0	*
2013		*	*	*	*	*	*	0	*
2012		1.5	1.5	*	1.5	1.5	0.00	12	3.0
2011		1.5	*	*	*	1.5	0.00	6	3.0
2010		1.5	1.5	1.50	1.5	1.5	0.00	30	3.0
2009		1.5	1.5	1.50	1.5	1.5	0.00	30	3.0
2008		*	*	*	*	*	*	0	*
2007		0.75	0.75	*	0.75	0.75	0.00	18	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		2.5	*	*	*	9.0	2.95	5	5.0
2002		2	2	5.16	14	17	4.37	31	4.0
2001		2	2	3.96	8.9	9.0	2.52	32	4.0
2000		2	2	2.90	5.0	11	2.02	31	4.0
1999		2	2	2.89	6.1	8.0	1.88	30	4.0
1998		2	2	2.83	5.9	7.0	1.64	32	4.0
1997		2	2	2.00	2	2	0.00	30	4.0
1996		2	2	2.00	2	2	0.00	29	4.0
1995		2	2	2.06	2	4.0	0.37	29	4.0
1994		2	2	2.26	2	5.0	0.83	30	4.0
1993		2	2	2.00	2	2	0.00	29	4.0
1992		2	*	*	*	2	0.00	10	4.0
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.