| Date | Value |
|---|---|
| Mar 8, 2014 10:21 | 0.00 ppm |
| Feb 8, 2014 13:39 | 0.00 ppm |
| Jan 12, 2014 09:48 | 80 ppm |
| Oct 20, 2013 10:54 | 0.00 ppm |
| Oct 12, 2013 23:08 | 20 ppm |
| Oct 12, 2013 13:42 | 0.00 ppm |
| Aug 19, 2013 17:58 | 0.00 ppm |
| Aug 8, 2013 10:24 | 1 ppm |
| Aug 3, 2013 14:00 | 0.00 ppm |
| Jul 23, 2013 11:05 | 0.00 ppm |
| Jul 22, 2013 18:51 | 0.00 ppm |