Table 1:

Samples and exposure dates

Cotton Towel			Paper Towel
	Sample	Exposure Date		Sample	Exposure Date
Short Term	SF 1D	March 5, 2014	Short Term	SF 1D	March 5, 2014
	SF 1D	March 15, 2015		SF 4D	March 1, 2014 – March 5, 2014
	SF 4D	March 1, 2014 – March 5, 2014		SF 4D	March 15, 2014 – March 19, 2014
	SF 10D	January 27, 2015 – February 6, 2015		SF 8D	March 7, 2014 – March 15, 2014
Long Term	SF 28D	January 27, 2015 – February 24, 2015	Long Term	SF 18D	February 6, 2015 – February 24, 2015
	SF 35D	January 31, 2015 – March 7, 2015		SF 28D	January 27, 2015 – February 24, 2015
	SF 31D	March 7, 2015 – April 7, 2015		SF 30D	March 15, 2014 – April 15, 2014
	SF 31D	March 7, 2015 – April 7, 2015		RV 59D	February 2014 – April 2014
	SF 74D	October 1, 2014 – December 13, 2014		SF 61D	May 2014 – July 2014
	Filter A 181D	February 2014 – August 2014		RV 61D	May 2014 – July 2014
	Filter B 365D	April 2014 – April 2015		RV 74D	October 1, 2014 – December 13, 2014
				SF 75D	August 1, 2014 – October 15, 2014