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	Annual Toxics Summary Modesto-I Street (Courthouse) FAQs Dibenz(a,h)anthracene-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		0.025	0.025	*	0.025	0.025	0.000	20	0.05	*
1997		0.025	0.025	0.036	0.025	0.25	0.042	30	0.05	0.1
1996		0.025	0.025	0.026	0.025	0.05	0.005	24	0.05	0.09
1995		0.025	0.025	0.032	0.025	0.11	0.020	24	0.05	0.1
1994		0.025	0.025	*	0.06	0.19	0.045	14	0.05	*
1993		0.025	0.025	0.054	0.11	0.27	0.060	24	0.05	0.2
1992		0.025	0.025	0.042	0.08	0.22	0.049	24	0.05	0.1
1991		0.025	0.025	0.082	0.21	0.42	0.105	24	0.05	0.3
1990		0.025	*	*	*	1.2	0.392	8	0.05	*
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.