| Date | Value |
|---|---|
| Oct 31, 2014 05:04 | 0.00 ppm |
| Oct 25, 2014 01:35 | 0.04 ppm |
| Oct 22, 2014 02:38 | 1 ppm |
| Oct 19, 2014 09:27 | 1 ppm |
| Oct 17, 2014 06:57 | 1 ppm |
| Oct 10, 2014 03:09 | 0.50 ppm |
| Oct 8, 2014 02:33 | 0.40 ppm |
| Oct 6, 2014 13:06 | 0.70 ppm |
| Oct 5, 2014 01:56 | 0.50 ppm |