| Date | Value |
|---|---|
| Nov 5, 2016 12:38 | 0.00 ppm |
| Aug 9, 2015 00:39 | 0.25 ppm |
| Apr 3, 2015 11:56 | 0.00 ppm |
| Dec 21, 2014 15:12 | 0.00 ppm |
| Nov 26, 2014 22:45 | 0.00 ppm |
| Oct 26, 2014 21:10 | 0.00 ppm |
| Sep 23, 2014 22:01 | 0.00 ppm |
| Sep 10, 2014 21:42 | 0.00 ppm |
| Sep 4, 2014 22:06 | 0.25 ppm |
| Jul 21, 2014 18:41 | 0.00 ppm |