Lean post flame oxidation is used as an environment to examine the destruction and byproduct formation of CH2 Cl-2. These conditions are similar to poor operating conditions that may occur in hazardous waste combustors, where unconsumed CHCs escape the primary flame zone and react in the cooler post-flame region. The main byproduct for the injected compound was COCl2. CH2Cl2 also produced C2HCl3 and cis and trans 1, 2-C2H2Cl2. The comparison of these results with data from previously reported flowreactor studies at pyrolytic and at oxidative pyrolytic conditions show significant differences in the concentration of the byproducts. The main reaction routes for the destruction of the injected CH2Cl2 and for the formation of the detected byproducts are discussed.