| Date | Value |
|---|---|
| Jun 25, 2015 11:36 | 0.00 ppm |
| Jun 21, 2015 11:36 | 0.00 ppm |
| Jun 8, 2015 11:36 | 0.00 ppm |
| Jun 5, 2015 11:36 | 0.00 ppm |
| May 9, 2015 22:14 | 1 ppm |
| Apr 25, 2015 19:51 | 1 ppm |
| Apr 18, 2015 13:23 | 0.00 ppm |
| Apr 4, 2015 16:59 | 0.00 ppm |
| Mar 29, 2015 21:26 | 0.00 ppm |
| Mar 20, 2015 11:00 | 0.00 ppm |