| Date | Value |
|---|---|
| Sep 14, 2016 19:24 | 10 ppm |
| Sep 13, 2016 14:30 | 5 ppm |
| Jun 3, 2016 14:13 | 0.00 ppm |
| Mar 7, 2016 18:56 | 0.00 ppm |
| Oct 3, 2015 11:34 | 0.00 ppm |
| Sep 7, 2015 22:19 | 0.00 ppm |
| Aug 3, 2015 16:22 | 0.00 ppm |
| Jul 9, 2015 11:35 | 0.00 ppm |
| Jun 22, 2015 19:48 | 0.00 ppm |