"Concentration of 2,3,3',4,4',5,5'-heptachlorobiphenyl {PCB189 CAS 39635-31-9} per unit volume of the water body [dissolved plus reactive particulate phase]"@en .
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"SDN:P01::SCES0049" .
"Amount (mass or number of moles) of the analyte per unit volume of an unfiltered sample of any fresh or salt water body."@en .
.