lixiviate

To separate (a substance) into soluble and insoluble components through percolation; to leach.

[…]the Slaves are out in the Storm, doing their Owners’ Laundry, observing and reading each occurrence of Blood, Semen, Excrement, Saliva, Urine, Sweat, Road-Mud, dead Skin, and other such Data of Biography, whose pure form they practice Daily, before all is lixiviated ’neath Heaven.

Of or relating to lye or lixivium; of the quality of alkaline salts.

Impregnated with salts from wood ashes.

but we cou'd not, by this way, discern the least acidity in our arsenical solution, but rather a manifest sign of an urinous or lixiviate quality

leachate