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	Annual Toxics Summary Stockton-Hazelton Street 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		0.025	*	*	*	0.07	0.020	5	0.05	*
2004		0.025	0.025	0.031	0.05	0.09	0.017	30	0.05	0.1
2003		0.025	0.025	0.035	0.09	0.11	0.026	31	0.05	0.1
2002		0.025	0.025	0.039	0.07	0.16	0.031	30	0.05	0.1
2001		0.025	0.025	0.039	0.07	0.16	0.033	31	0.05	0.1
2000		0.025	0.025	0.038	0.07	0.15	0.031	30	0.05	0.1
1999		0.025	0.025	0.040	0.07	0.27	0.047	30	0.05	0.1
1998		0.025	0.025	0.037	0.025	0.22	0.049	31	0.05	0.1
1997		0.025	0.025	0.027	0.025	0.07	0.008	30	0.05	0.09
1996		0.025	0.025	0.026	0.025	0.06	0.007	24	0.05	0.09
1995		0.025	0.025	*	0.025	0.14	0.026	20	0.05	*
1994		0.025	0.025	*	0.06	0.09	0.021	14	0.05	*
1993		0.025	0.025	0.054	0.11	0.22	0.054	23	0.05	0.2
1992		0.025	0.025	0.039	0.06	0.17	0.038	24	0.05	0.1
1991		0.025	0.025	0.081	0.31	0.39	0.117	24	0.05	0.3
1990		0.025	*	*	*	1.2	0.403	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.