| Date | Value |
|---|---|
| Sep 8, 2014 12:10 | 0.00 ppm |
| Aug 8, 2014 17:24 | 0.00 ppm |
| Jul 18, 2014 14:10 | 0.00 ppm |
| Jul 11, 2014 13:43 | 0.00 ppm |
| Jun 30, 2014 13:33 | 0.00 ppm |
| Jun 23, 2014 12:22 | 0.00 ppm |
| Jun 13, 2014 21:33 | 0.00 ppm |
| Jun 6, 2014 13:03 | 0.00 ppm |
| May 31, 2014 14:37 | 2 ppm |
| May 25, 2014 11:02 | 2 ppm |
| May 23, 2014 16:07 | 0.00 ppm |
| May 21, 2014 10:26 | 0.00 ppm |
| May 17, 2014 01:06 | 0.00 ppm |
| May 12, 2014 15:38 | 0.00 ppm |