Table 31.
Hydrocarbons
| Agent | 2010 (%) | 2011 (%) | 2012 (%) | Total (%) | |
|---|---|---|---|---|---|
| Aliphatic | Methane | 2 (4) | 6 (9) | 4 (9) | 12 (8) |
| Hexane | 2 (4) | 2 (3) | 0 (0) | 4 (3) | |
| Other aliphatic | 0 (0) | 4 (6) | 0 (0) | 4 (3) | |
| Aromatic | Benzene | 3 (6) | 3 (5) | 5 (11) | 11 (7) |
| Naphthalene | 0 (0) | 3 (5) | 2 (5) | 5 (3) | |
| Xylene | 3 (6) | 3 (5) | 1 (2) | 7 (4) | |
| Ethylenzene | 0 (0) | 2 (3) | 1 (2) | 3 (2) | |
| Toluene | 0 (0) | 1 (2) | 3 (7) | 4 (3) | |
| Other | Gasoline | 1 (2) | 4 (6) | 5 (11) | 10 (6) |
| Kerosene | 2 (4) | 3 (5) | 1 (2) | 6 (2) | |
| Mineral oil | 0 (0) | 1 (2) | 1 (2) | 2 (1) | |
| Paraffin oil | 0 (0) | 1 (2) | 2 (5) | 3 (2) | |
| Tetrachloroethylene | 1 (2) | 5 (8) | 0 (0) | 6 (2) | |
| Methylene chloride | 1 (2) | 4 (6) | 2 (5) | 7 (4) | |
| Trichloroethylene | 4 (8) | 2 (3) | 1 (2) | 7 (4) | |
| Difluoroethane | 3 (6) | 1 (2) | 3 (7) | 7 (4) | |
| Dichloroethane | 0 (0) | 1 (2) | 0 (0) | 1 (0) | |
| Ethyl chloride | 0 (0) | 1 (2) | 1 (2) | 2 (1) | |
| Chlorofluorocarbons | 0 (0) | 1 (2) | 1 (2) | 2 (1) | |
| Other hydrocarbons | 28 (56) | 16 (25) | 12 (27) | 56 (36) | |
| Totals | 50 | 67 | 45 | 159 | |