| Date | Value |
|---|---|
| Feb 17, 2016 20:54 | 110 ppm |
| Jan 9, 2016 21:24 | 20 ppm |
| Dec 27, 2015 18:49 | 20 ppm |
| Oct 30, 2015 17:15 | 20 ppm |
| Oct 13, 2015 19:46 | 20 ppm |
| Oct 12, 2015 14:36 | 20 ppm |
| Oct 7, 2015 18:34 | 20 ppm |
| Oct 4, 2015 17:11 | 20 ppm |
| Oct 3, 2015 22:23 | 0.00 ppm |
| Sep 24, 2015 23:01 | 5 ppm |
| Sep 17, 2015 21:14 | 18 ppm |