| Date | Value |
|---|---|
| Apr 22, 2017 22:13 | 160 ppm |
| Apr 19, 2017 22:10 | 160 ppm |
| Apr 15, 2017 19:01 | 160 ppm |
| Apr 11, 2017 05:44 | 120 ppm |
| Mar 22, 2017 19:50 | 0.00 ppm |
| Mar 21, 2017 00:36 | 0.00 ppm |
| Mar 18, 2017 19:49 | 0.00 ppm |
| Mar 18, 2017 09:38 | 0.50 ppm |
| Mar 17, 2017 07:37 | 0.00 ppm |
| Mar 16, 2017 19:11 | 0.00 ppm |
| Mar 15, 2017 19:00 | 0.00 ppm |