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  • It's basically lime and sand surely. What sort of damage is a small amount diluted going to do to a river?

    Increase the acidity? By how much?

    Obviously the larger quantity you'll leave to dry out and then take to the dump. But I'm surprised there's an issue with the water.

  • Mainly Calcium Sulphate plus additives plus whatever the plastere/his mate add to speed up or retard the rate of cure.
    You don't dump any effluent into the stormwater drains. Well not till Brexit anyway.

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