An indigenous Pseudomonas sp., isolated from the regional contaminated soil and identified as P.plecoglossicida, was evaluated for its aerobic cometabolic removal of cis-1,2-dichloroethylene (cis-DCE) and trichloroethylene (TCE) using toluene as growth substrate in a laboratory-scale soil slurry. The aerobic simultaneous bioremoval of the cis-DCE/TCE/toluene mixture was studied under different conditions. Results showed that the increased toluene concentration from 300 to 900 mg/kg increased the lag phase for the bacterial growth and correspondingly prolonged toluene bioremoval, while the bioremovalextent for cis-DCE, TCE,and toluenedeclined as the initial toluene concentration increased. In addition, the cometabolicbioremoval of cis-DCE and TCE was inhibited in the presence of hydrogen peroxide as the additional oxygen source, while the bioremoval of toluene (900 mg/kg) was enhanced. The subsequent addition of toluenedid not improve the cometabolicbioremoval of cis-DCE and TCE. The cometabolism ofcis-DCE and TCE was significantly greater when toluene was provided as growth substrate, compared to the BTEX mixture provided as substrates.