| Date | Value |
|---|---|
| Jan 26, 2015 15:47 | 0.00 ppm |
| Jan 10, 2015 18:39 | 0.13 ppm |
| Jan 9, 2015 19:56 | 0.00 ppm |
| Dec 31, 2014 18:17 | 0.00 ppm |
| Dec 22, 2014 11:35 | 0.00 ppm |
| Dec 14, 2014 15:16 | 0.00 ppm |
| Dec 8, 2014 15:16 | 0.00 ppm |
| Dec 5, 2014 20:02 | 0.00 ppm |
| Sep 24, 2014 14:50 | 0.00 ppm |
| Sep 7, 2014 17:25 | 0.00 ppm |
| Aug 20, 2014 13:14 | 0.04 ppm |
| Aug 14, 2014 17:32 | 0.08 ppm |