| Date | Value |
|---|---|
| Jun 25, 2013 19:09 | 0.00 ppm |
| Jun 13, 2013 17:10 | 0.25 ppm |
| Jun 12, 2013 12:04 | 0.50 ppm |
| Jun 11, 2013 21:45 | 4 ppm |
| Jun 10, 2013 22:16 | 4 ppm |
| Jun 9, 2013 13:42 | 4 ppm |
| Jun 8, 2013 09:18 | 5 ppm |
| Jun 7, 2013 21:56 | 5 ppm |
| Jun 7, 2013 13:57 | 5 ppm |
| Jun 6, 2013 21:47 | 5 ppm |
| Jun 5, 2013 15:40 | 5 ppm |
| Jun 4, 2013 12:40 | 4 ppm |
| Jun 2, 2013 12:40 | 0.15 ppm |