| Similarity | Rank | |
|---|---|---|
| PCE | 0.780 | 81477 |
| MTBE | 0.756 | 96906 |
| benzene | 0.738 | 46443 |
| contaminant | 0.725 | 45441 |
| PAHs | 0.721 | 93057 |
| toluene | 0.721 | 81758 |
| VOCs | 0.708 | 56195 |
| CO | 0.706 | 11074 |
| hydrocarbons | 0.693 | 32458 |
| Methane | 0.692 | 69623 |
| SO2 | 0.691 | 90224 |
| Ammonia | 0.688 | 78473 |
| dioxin | 0.687 | 57731 |
| dioxins | 0.682 | 77636 |
| hydrocarbon | 0.681 | 36213 |
| Groundwater | 0.681 | 66053 |
| groundwater | 0.678 | 17131 |
| chlorinated | 0.676 | 53829 |
| ammonia | 0.673 | 21773 |
| Chloride | 0.672 | 78692 |
| chloride | 0.671 | 23685 |
| sulfide | 0.671 | 49224 |
| PAH | 0.670 | 55550 |
| methylene | 0.669 | 93319 |
| Formaldehyde | 0.668 | 99913 |