| Date | Value |
|---|---|
| Aug 16, 2015 12:26 | 0.00 ppm |
| Mar 8, 2015 18:55 | 0.00 ppm |
| Feb 17, 2015 06:49 | 0.00 ppm |
| Feb 15, 2015 11:11 | 0.00 ppm |
| Jan 24, 2015 16:12 | 0.00 ppm |
| Oct 4, 2014 11:38 | 0.02 ppm |
| Sep 13, 2014 09:22 | 0.00 ppm |
| Jul 23, 2014 07:00 | 0.07 ppm |
| Jul 18, 2014 21:28 | 0.00 ppm |
| Jun 21, 2014 08:23 | 0.00 ppm |
| Jun 6, 2014 17:42 | 0.00 ppm |
| Apr 24, 2013 20:56 | 0.00 ppm |