Aggressive method means removal or disturbance of building/vessel materials by sanding, abrading, grinding, or other method that breaks, crumbles, or otherwise disintegrates intact ACM.Amended water means water to which surfactant (wetting agent) has been added to increase the ability of the liquid to penetrate ACM.Asbestos includes chrysotile, amosite, crocidolite, tremolite asbestos, anthophylli