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Question from Paula Finn

Hi Debra,

Thanks again for all you do!

Would you be concerned about landscaping with decomposed granite? It may contain crystalline silica, which I believe is carcinogenic to breathe.

Debra’s Answer

I wouldn’t be concerned about this.

Crystalline silica is bound up in the granite. You would have to walk on it heavily and repeatedly for even a tiny amount to be released as the pieces of granite rub against each other. If it’s not in a walkway, this wouldn’t happen.

Even in a walkway, just a few people walking on it once or twice a day still wouldn’t be enough to release the silica.

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