| Date | Value |
|---|---|
| Oct 20, 2016 11:51 | 0.00 ppm |
| May 15, 2016 11:05 | 0.00 ppm |
| May 6, 2016 04:59 | 0.00 ppm |
| May 4, 2016 12:48 | 0.00 ppm |
| May 1, 2016 21:31 | 0.01 ppm |
| Apr 28, 2016 07:33 | 0.10 ppm |
| Apr 27, 2016 08:07 | 0.10 ppm |
| Apr 26, 2016 09:54 | 0.45 ppm |
| Apr 25, 2016 21:18 | 0.75 ppm |
| Apr 25, 2016 08:35 | 1 ppm |
| Apr 24, 2016 08:11 | 1 ppm |
| Apr 23, 2016 08:06 | 0.30 ppm |
| Apr 22, 2016 08:31 | 0.01 ppm |
| Apr 21, 2016 23:40 | 0.00 ppm |