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	Annual Toxics Summary Fremont-Chapel Way FAQs Methylene Chloride parts per billion

Read About Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
2023		*	*	*	*	*	*	0	*	*
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		*	*	*	*	*	*	0	*	*
2012		*	*	*	*	*	*	0	*	*
2011		*	*	*	*	*	*	0	*	*
2010		0.05	0.1	*	0.19	4.4	1.04	17	0.1	*
2009		0.05	0.05	0.099	0.19	0.26	0.061	31	0.1	1
2008		0.05	0.05	0.093	0.15	0.28	0.055	31	0.1	0.9
2007		0.05	0.11	0.123	0.21	0.55	0.097	30	0.1	1
2006		0.05	0.11	0.199	0.21	1.7	0.33	29	0.1	2
2005		0.05	0.14	*	0.24	0.64	0.117	28	0.1	*
2004		0.05	0.05	0.097	0.19	0.41	0.078	30	0.1	1
2003		0.05	0.16	0.299	0.48	2.6	0.494	30	0.1	3
2002		0.05	0.2	0.227	0.32	1.2	0.21	28	0.1	2
2001		0.5	0.12	0.285	0.29	0.42	0.173	30	0.1	3
2000		0.5	0.5	0.50	0.5	0.5	0.00	29	1.0	5
1999		0.5	0.5	*	2.3	4.8	1.20	25	1.0	*
1998		0.5	0.5	*	0.5	1.5	0.18	30	1.0	*
1997		0.5	0.5	*	0.5	0.5	0.00	13	1.0	*
1996		0.5	0.5	0.50	0.5	0.5	0.00	31	1.0	5
1995		0.5	0.5	0.62	1.2	1.3	0.29	30	1.0	6
1994		0.5	0.5	0.50	0.5	0.5	0.00	31	1.0	5
1993		0.5	0.5	0.83	0.5	11	1.92	30	1.0	8
1992		0.5	0.5	0.52	0.5	1.3	0.15	30	1.0	5
1991		0.5	0.5	0.58	0.5	3.4	0.53	30	1.0	6
1990		0.5	0.5	0.76	1.2	2.7	0.53	29	1.0	8
1989		0.5	0.5	0.73	1.7	2.1	0.53	24	1.0	7

	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.