| Date | Value |
|---|---|
| Sep 16, 2018 05:41 | 50 ppm |
| Sep 2, 2018 05:41 | 50 ppm |
| Feb 19, 2017 13:57 | 50 ppm |
| Jan 22, 2017 03:38 | 50 ppm |
| Dec 20, 2016 02:17 | 0.00 ppm |
| Dec 11, 2016 18:58 | 0.00 ppm |
| Dec 2, 2016 05:56 | 0.00 ppm |
| Nov 26, 2016 10:31 | 50 ppm |
| Oct 27, 2016 16:35 | 0.00 ppm |
| Oct 24, 2016 10:09 | 0.00 ppm |
| Oct 20, 2016 10:44 | 60 ppm |
| Oct 18, 2016 15:38 | 25 ppm |
| Oct 2, 2016 00:32 | 25 ppm |