| Date | Value |
|---|---|
| Aug 23, 2014 12:47 | 0.00 ppm |
| Jul 19, 2014 13:56 | 0.00 ppm |
| Jul 6, 2014 11:29 | 0.00 ppm |
| May 8, 2014 14:48 | 0.00 ppm |
| Apr 19, 2014 09:42 | 0.05 ppm |
| Dec 24, 2013 14:52 | 0.00 ppm |
| Aug 31, 2013 06:52 | 0.00 ppm |
| Aug 25, 2013 20:09 | 0.00 ppm |
| Aug 20, 2013 19:21 | 0.00 ppm |