| Date | Value |
|---|---|
| Dec 18, 2018 14:40 | 40 ppm |
| Dec 15, 2018 11:54 | 5 ppm |
| Dec 14, 2018 12:22 | 2 ppm |
| Dec 13, 2018 11:25 | 5 ppm |
| Dec 12, 2018 11:23 | 40 ppm |
| Dec 11, 2018 09:25 | 40 ppm |
| Dec 9, 2018 10:13 | 20 ppm |
| Dec 8, 2018 07:33 | 10 ppm |
| Dec 7, 2018 08:21 | 5 ppm |
| Dec 6, 2018 08:52 | 5 ppm |
| Nov 28, 2018 05:34 | 0.00 ppm |
| Nov 27, 2018 11:32 | 0.00 ppm |