| Date | Value |
|---|---|
| Jul 30, 2014 01:23 | 0.00 ppm |
| May 7, 2014 22:51 | 2.5 ppm |
| Apr 27, 2014 23:41 | 2.5 ppm |
| Apr 24, 2014 01:05 | 2.5 ppm |
| Apr 20, 2014 23:29 | 5 ppm |
| Apr 17, 2014 15:51 | 20 ppm |
| Apr 12, 2014 17:19 | 20 ppm |
| Apr 11, 2014 23:49 | 20 ppm |
| Apr 10, 2014 23:07 | 40 ppm |
| Mar 18, 2014 22:00 | 5 ppm |