| Date | Value |
|---|---|
| Sep 28, 2014 19:30 | 5 ppm |
| Sep 1, 2014 09:32 | 5 ppm |
| Aug 23, 2014 17:59 | 5 ppm |
| Aug 18, 2014 20:08 | 5 ppm |
| Aug 3, 2014 10:19 | 5 ppm |
| Jul 28, 2014 20:58 | 10 ppm |
| Jul 22, 2014 19:45 | 5 ppm |
| Jul 19, 2014 09:10 | 10 ppm |
| Jul 12, 2014 11:31 | 5 ppm |
| Jul 6, 2014 10:17 | 10 ppm |
| Jun 27, 2014 17:16 | 5 ppm |
| Jun 21, 2014 21:12 | 5 ppm |
| Jun 15, 2014 20:31 | 10 ppm |
| Jun 8, 2014 19:02 | 20 ppm |
| Jun 1, 2014 21:34 | 4 ppm |
| May 28, 2014 21:38 | 4 ppm |