1. Semprini and McCarty (13 14) was tions of PCE and TCE. The studies also
2. adapted to include a transformation capac- indicate that TCE concentration is an
3. ity model for TCE degradation of the form important factor to consider. Studies at
4. proposed by Alvarez-Cohen and McCarty other sites are needed to determine if
5. and Anderson and McCarty (17). consistent results are obtained.