The ozone/GAC process, sometimes termed BAC(Biological Activated Carbon) appeared to be effective for the removal of soluble organic matters in the drinking water Chabrol is a simple model for the simulation like as the variation of HPC and BDOC in the BAC tower. This study were carried out to calibrate of HPC and BDOC and to evaluate H_1 and H_2 of ozone-treated water with Chabrol model. BDOC values of the ozone-treated water and BAC effluent are analyzed using method of Levi and Joret. As the ozone-treated water and BAC Effluent are incubated, the HPC are increased up to 0.24 mgC/ℓ and 0.09 mgC/ℓ respectively. H_1 and H_2 of the ozone-treated water is 0.3 mgC/ℓ and 0.349 mgC/ℓ respectively and Chabrol model for BAC tower can be calibrated.