"Concentration of beta-hexachlorocyclohexane {beta-HCH CAS 319-85-7} per unit volume of the water body [dissolved plus reactive particulate phase]"@en .
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"SDN:P01::RWS00062" .
"Quantity or mass of the specified substance measured in a specified volume of an unfiltered sample from any body of fresh or salt water."@en .
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