| http://www.w3.org/ns/prov#value | - For some contaminants, such as lead and copper, rather than a parts-per-million limit, the EPA sets a treatment technique standard (TT), which requires specific treatment measures if contaminants exceed established action levels.- Scott Alan Lewis, SC-Guide/Safe Drinking Water (Get the book.)Surface water treatment rule violation (SWTR)???indicates a monitoring violation, a filtration requireme
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