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	Annual Toxics Summary Chico-Manzanita Avenue FAQs Methyl Bromide parts per billion

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		0.015	0.015	*	0.04	0.04	0.010	12	0.03
2011		0.015	0.015	0.015	0.015	0.03	0.003	29	0.03
2010		0.015	0.015	0.018	0.015	0.05	0.009	30	0.03
2009		0.015	0.015	0.024	0.06	0.11	0.024	31	0.03
2008		0.015	0.015	0.027	0.04	0.28	0.048	31	0.03
2007		0.015	0.015	0.043	0.03	0.59	0.107	29	0.03
2006		0.015	0.015	0.020	0.04	0.05	0.011	30	0.03
2005		0.015	0.015	0.044	0.06	0.51	0.095	31	0.03
2004		0.015	0.015	0.022	0.04	0.08	0.014	30	0.03
2003		0.015	0.015	0.022	0.03	0.15	0.027	31	0.03
2002		0.015	0.015	0.026	0.04	0.14	0.025	29	0.03
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		*	*	*	*	*	*	0	*
1998		*	*	*	*	*	*	0	*
1997		*	*	*	*	*	*	0	*
1996		*	*	*	*	*	*	0	*
1995		*	*	*	*	*	*	0	*
1994		*	*	*	*	*	*	0	*
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	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.