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  • Seattle lab tests marijuana for quality, potencyadd to reading list  

    Posted on July 4, 2014 at 5:52 PM

    Updated Friday, Jul 4 at 5:52 PM

    Pot producers submit samples, which are then broken down, tested, and inspected for contamination. The first recreational marijuana stores in Washington are expected to open Tuesday.

    By ADAM MERTZ / KING 5 News

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