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The article offers the authors' views on the study of J. H. Yin regarding the effect of compaction on hydraulic conductivity of completely decomposed granite (CDG) in Hong Kong. It explores the authors' comments on the study in various areas including basic soil properties, permeability testing and its comparison with predictive models of CDG. The authors stress that CDG used by Yin seems not to meet the conditions of predictive model for saturated hydraulic conductivity (ksat).

The article offers the author's response on the discussions by Aubertin and Chapuis on the article "Influence of relative compaction on the hydraulic conductivity of completely decomposed granite in Hong Kong." It states that both the modified Proctor test and the standard Proctor test are utilized in Hong Kong for fill compaction. The author concurs with the discussants that the completely decomposed granite (CDG) fill compressed in the mould and submerged was not completely saturated.