| Date | Value |
|---|---|
| Jan 23, 2014 12:12 | 0.00 ppm |
| Jan 2, 2014 14:41 | 0.15 ppm |
| Dec 21, 2013 14:36 | 2 ppm |
| Dec 13, 2013 22:47 | 1 ppm |
| Dec 9, 2013 10:33 | 0.00 ppm |
| Dec 5, 2013 18:49 | 0.00 ppm |
| Dec 3, 2013 15:05 | 5 ppm |
| Dec 2, 2013 09:40 | 10 ppm |
| Nov 30, 2013 21:06 | 10 ppm |
| Nov 29, 2013 22:00 | 5 ppm |
| Nov 28, 2013 22:12 | 5 ppm |
| Nov 27, 2013 19:40 | 5 ppm |
| Nov 26, 2013 20:51 | 10 ppm |
| Nov 25, 2013 20:03 | 3 ppm |