Mechanisms and late constants for hydrogen atom attack on trichloroethylene have been determined in single-pulse shock tube experiments near 1050 K. Products from all the decomposition channels have been observed. The predominant process is the displacement of the chlorine at the least substituted site. The following rate expressions have been determined : k(H* + HClC=CCL(2) --> H2C=CCl2 + Cl*) = 6 x 10(13) exp(-2439/T) cm(3) mol(-1) s(-1); k(H* + HClC=CCl2 --> HClC=CClH(cis + trans) + Cl*) = 3.7 x 10(13) exp(-3946/T) cm(3) mol(-1) s(-1); K(H* + HClC=CCl2 --> *HC=CCl2 or HClC=CCl* + HCl) = 3.8 x 10(14) exp(-6686/T) cm(3) mol(-1) s(-1). An upper limit for the rate constant of the abstraction process H* + HClC=CCl2 --> *ClC=CCl2 + H-2 is 6.5 x 10(10) cm(3) mol(-1) s(-1) at 1050 K. Rate constants for chlorine attack on H-2 at these temperatures are a factor of 13 smaller than those on mesitylene. The results are compared with those for hydrogen atom reactions with other unsaturated compounds. Some implications regarding the incineration of chlorinated organics will be discussed.