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WebDec 10, 2024 · This means that little, if any, water will pass through MOT Type 1, and what does pass through will filter through at a very a slow … centre for natural medicine winnipeg mb Webcalled MOT Type 1 by contractors. This has a lot of fine material in it (sand and silt) that stops water passing through it easily. For permeable and porous driveways different … centre for national security studies