| Date | Value |
|---|---|
| Feb 26, 2015 19:05 | 20 ppm |
| Feb 15, 2015 12:37 | 10 ppm |
| Jan 31, 2015 14:39 | 10 ppm |
| Jan 24, 2015 13:21 | 10 ppm |
| Jan 18, 2015 12:39 | 10 ppm |
| Jan 11, 2015 18:41 | 10 ppm |
| Jan 6, 2015 19:22 | 20 ppm |
| Jan 3, 2015 18:40 | 20 ppm |
| Dec 30, 2014 12:42 | 10 ppm |
| Dec 27, 2014 11:05 | 20 ppm |
| Dec 24, 2014 11:48 | 20 ppm |
| Dec 21, 2014 14:50 | 0.00 ppm |