Concentrations of toxic "dioxin-like" PCB congeners in wild and net pen rainbow trout collected from Lake 
Roosevelt and the Upper Columbia River, 1998. 								


[Upper, Northport to Kettle Falls; Lower, Spokane River to Grand Coulee Dam; <: less than; pg/g, picograms 
per gram] 								


                        Upper     Upper     Lower     Lower      Lower     Lower     Lower      Lower
Toxic "dioxin-like"      Wild      Wild      Wild      Wild     Net pen   Net pen   Net pen    Net pen
PCB Congeners (pg/g)    USGS-2    USGS-3    USGS-9   USGS-10    USGS-17   USGS-18   USGS-23    USGS-24

3,3',4,4'-TCB (77)       21.8      19.1      89.2      42.2      78.2       12.7      12.5       8.4
2',3,4,4',5-PeCB (123)   24.8      40.5      28.3      26.5      22.7       7.3       <6.0       8.7
2,3',4,4',5-PeCB (118)  2150.0    2650.0    1210.0    942.0     1610.0     376.0     296.0      352.0
2,3,4,4'5-PeCB (114)     49.2      79.8      49.4      31.4      46.6       12.2      <7.2      10.0
2,3,3'4,4'-PeCB (105)   688.0     864.0     462.0     377.0      610.0     135.0     112.0      115.0
3,3',4,4',5-PeCB (126)  <10.3     <13.2      <6.5      <7.6      <12.2      <7.2      <7.6      <5.4

2,3',4,4',5,5'-HxCB (1  118.0     148.0      29.0      29.1      83.6       14.8      14.8      14.1
2,3,3',4,4',5-HxCB (15  315.0     376.0      41.8      52.0      159.0      24.3     <30.7      <26.1
2,3,3',4,4',5'-HxCB (1   59.1      74.2      9.6       13.2      40.3       <9.4      5.5       <4.3
3,3',4,4',5,5'-HxCB (1   <6.9      <8.5      <6.7      <4.2      <5.6       <3.2      <3.7      <5.2

2,2',3,4,4',5,5'-HpCB   2410.0    2180.0    493.0     539.0     1330.0     234.0     276.0      298.0
2,2',3,3',4,4',5-HpCB   766.0     765.0     174.0     164.0      463.0      84.4      95.9      108.0
2,3,3',4,4',5,5'-HpCB    26.7      25.5      <2.3      <2.6      16.4       4.0       3.3       <3.4