| Date | Value |
|---|---|
| Apr 12, 2015 03:52 | 0.00 ppm |
| Feb 19, 2015 00:35 | 0.00 ppm |
| Nov 18, 2014 05:37 | 0.00 ppm |
| Oct 23, 2014 06:14 | 0.00 ppm |
| Sep 19, 2014 10:12 | 0.00 ppm |
| Sep 3, 2014 04:54 | 0.25 ppm |
| Aug 4, 2014 03:51 | 0.50 ppm |
| Jul 20, 2014 08:42 | 2 ppm |
| Jul 6, 2014 05:19 | 0.00 ppm |
| Apr 7, 2014 13:48 | 0.00 ppm |
| Mar 25, 2014 01:36 | 0.00 ppm |
| Mar 9, 2014 08:30 | 0.00 ppm |
| Mar 2, 2014 09:01 | 0.00 ppm |
| Feb 24, 2014 08:13 | 0.00 ppm |
| Feb 8, 2014 02:22 | 0.00 ppm |