| Date | Value |
|---|---|
| Aug 2, 2014 00:30 | 0.00 ppm |
| Jul 27, 2014 00:24 | 0.00 ppm |
| Jul 26, 2014 01:07 | 0.10 ppm |
| Jul 21, 2014 07:23 | 8 ppm |
| Jul 18, 2014 08:06 | 15 ppm |
| Jul 16, 2014 05:47 | 8 ppm |
| Jul 15, 2014 05:47 | 15 ppm |
| Jul 14, 2014 05:47 | 20 ppm |
| Jul 12, 2014 04:33 | 5 ppm |
| Jul 11, 2014 02:43 | 5 ppm |