| ID | Date | Chemical | Change |
| 5 | 02/19/2020 | Cadmium (water) | Chemical changes to Cadmium (water) made by dan.cook@dnr.iowa.gov on 2/19/2020 11:09:47 AM. ||Property cancer_group was: B; is: D |
| 6 | 02/19/2020 | Chloroform | Chemical changes to Chloroform made by dan.cook@dnr.iowa.gov on 2/19/2020 11:10:31 AM. ||Property cancer_group was: B; is: D |
| 7 | 02/20/2020 | Butyl Benzyl Phthalate | Chemical changes to Butyl Benzyl Phthalate made by dan.cook@dnr.iowa.gov on 2/20/2020 7:14:25 AM. ||Property name was: Butyl Benzyl Phthlate; is: Butyl Benzyl Phthalate |
| 8 | 11/09/2020 | Dioxin (2,3,7,8-tetrachlorodibenzo-p) | Chemical changes to Dioxin (2,3,7,8-tetrachlorodibenzo-p) made by dan.cook@dnr.iowa.gov on 11/9/2020 4:05:57 PM. ||Property dw_max_level was: 3E-05; is: 3E-08 |
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