| Well | Average d13C (‰) | ||||
| Benzene | Toluene | Ethylbenzene | m,p-Xylenes | o-Xylene | |
| BH-4 MW-C | −28.9 | −28.4 | −28.6 | −28.4 | Not analyzed |
| DMW-3-C | −27.0 | −29.4 | −28.6 | −28.8 | −28.6 |
| MW-101 | −29.1 | −29.4 | −29.1 | −28.4 | Not analyzed |