Determine whether you need peroxide, oxalic acid or chlorine bleach to perform the bleaching treatment. All three are used in bleaching procedures, and all three have different effects on white oak floors. Use peroxide bleach to lighten the natural wood color; this will not work on dye stains. Chlorine bleach is effective in lightening dye stains. Oxalic acid removes tannic acid stains, which occur in oak floors. Tannic acid stains usually look blackish in color.
Dampen a clean cloth with denatured alcohol and wash the wood to remove dirt.
Sand wood with sandpaper or a mechanical sander to remove paint and varnish.
Sweep with a broom or vacuum the floor to remove all debris and dust.
Wash the floor again with a clean cloth soaked in mineral spirits. The mineral spirits will remove all grease and oil.
Open windows and doors to provide ventilation in the room in which you are bleaching the floor.
Put on tough plastic or rubber gloves, and affix a pair of safety glasses to your face.
Pour your bleaching solution directly into a plastic bucket -- do not dilute.
Dip a clean cloth into the bleaching agent and apply it directly to the floor, wiping it across the wood with even, broad strokes. Use a sponge or brush to apply the bleaching agent only to certain areas of the floor. If you are doing a large area of floor, you may consider renting a spray gun from a home improvement store to spread the bleaching agent quickly. Wash the gun in cold water immediately after use.
Allow the floor to dry completely; the process will take from 6 to 15 hours. Wait even longer, if necessary, to be certain the white oak is dry before proceeding.
Wash the wood again with denatured alcohol, and sand the wood again to remove any bleach that was absorbed into the cracks of the wood. Sand only lightly to avoid revealing unbleached wood underneath the treated floor.