| Date | Value |
|---|---|
| Mar 13, 2017 20:11 | 0.00 ppm |
| May 30, 2014 12:57 | 0.00 ppm |
| Mar 20, 2014 20:47 | 0.00 ppm |
| Mar 16, 2014 12:12 | 0.02 ppm |
| Mar 14, 2014 20:54 | 0.05 ppm |
| Mar 12, 2014 20:46 | 0.05 ppm |
| Mar 11, 2014 23:02 | 0.15 ppm |
| Mar 10, 2014 23:11 | 0.25 ppm |
| Mar 9, 2014 23:34 | 0.25 ppm |
| Mar 6, 2014 20:53 | 0.00 ppm |
| Mar 3, 2014 19:51 | 0.00 ppm |
| Mar 2, 2014 12:10 | 0.00 ppm |
| Feb 27, 2014 21:18 | 0.00 ppm |
| Feb 25, 2014 22:24 | 0.00 ppm |