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Lukas Kambic replied on

"But in fact, the U.S. Environmental Protection Agency (EPA) found in 2009 that dozens of hazardous materials, not regulated and not required to be tested for, have been documented in each and every one of the sludge samples the agency took from locations around the country. " This article doesn't mention the quantities they found. Assay techniques are pretty sensitive these days. Did they find enough to be worried about, or just traces?
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