| Date | Value |
|---|---|
| Mar 20, 2016 19:38 | 1.2 ppm |
| Mar 13, 2016 22:17 | 0.00 ppm |
| Mar 10, 2016 23:18 | 0.00 ppm |
| Mar 29, 2015 10:21 | 0.00 ppm |
| Mar 8, 2015 11:58 | 0.00 ppm |
| Mar 1, 2015 14:50 | 0.00 ppm |
| Feb 26, 2015 10:26 | 0.00 ppm |
| Feb 22, 2015 15:36 | 0.00 ppm |
| Feb 8, 2015 10:06 | 0.00 ppm |
| Feb 1, 2015 23:11 | 0.00 ppm |
| Jan 25, 2015 22:58 | 0.00 ppm |
| Jan 18, 2015 22:58 | 0.00 ppm |
| Dec 22, 2014 22:58 | 0.00 ppm |