U.S. Dept Commerce/NOAA/NMFS/NWFSC/Publications

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Table A23. Method blanks. Concentrations, ng/g wet weight, of chlorinated analytes in method blanks.

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Chlorinated analytes	Lab no.:	59-284	59-293	59-408	59-442	59-596	59-728
hexachlorobenzene		nd	nd	nd	nd	nd	nd
lindane (gamma-BHC)		nd	nd	nd	nd	nd	nd
heptachlor		nd	nd	nd	nd	nd	nd
aldrin		nd	nd	nd	nd	nd	nd
heptachlor epoxide		nd	nd	nd	nd	nd	nd
alpha-chlordane		nd	nd	nd	nd	nd	nd
trans-nonachlor		nd	nd	nd	nd	nd	nd
dieldrin		nd	nd	nd	nd	nd	nd
mirex		nd	nd	nd	nd	nd	nd
o,p'-DDE		nd	nd	nd	nd	nd	nd
p,p'-DDE		nd	nd	nd	nd	nd	nd
o,p'-DDD		nd	nd	nd	nd	nd	nd
p,p'-DDD		nd	nd	nd	nd	nd	nd
o,p'-DDT		nd	nd	nd	nd	nd	nd
p,p'-DDT		nd	nd	nd	nd	nd	nd
trichlorobiphenyls		nd	0.9	1	nd	2	6
tetrachlorobiphenyls		nd	2	5	5	7	nd
pentachlorobiphenyls		2	2	4	2	4	nd
hexachlorobiphenyls		nd	0.4	2	2	2	nd
heptachlorobiphenyls		nd	nd	nd	nd	0.3	nd
octachlorobiphenyls		nd	nd	nd	nd	nd	nd
nonachlorobiphenyls		nd	nd	nd	nd	nd	nd
decachlorobiphenyl		nd	nd	nd	nd	nd	nd

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Table A24. Method blanks. Concentrations, ng/g wet weight, of individual polychlorinated biphenyl (PCB) isomers in method blanks.

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Individual PCB isomers	Lab no.:	59-284	59-293	59-408	59-442	59-596	59-728
2,2',5-trichlorobiphenyl (no. 18) *		nd	nd	nd	nd	1	nd
2,4,4'-trichlorobiphenyl (no. 28)		nd	nd	1	nd	0.9	nd
2,2',3,5'-tetrachlorobiphenyl (no. 44)		nd	nd	3	4	3	4
2,2',5,5'-tetrachlorobiphenyl (no. 52)		nd	nd	nd	nd	0.6	nd
2,3',4,4'-tetrachlorobiphenyl (no. 66)		nd	nd	0.7	nd	0.9	nd
2,2',4,5,5'-pentachlorobiphenyl (no. 101)		nd	nd	0.8	0.4	0.7	nd
2,3,3'4,4'-pentachlorobiphenyl (no. 105)		nd	nd	nd	nd	nd	nd
2,3',4,4',5-pentachlorobiphenyl (no. 118)		nd	nd	0.9	0.6	0.9	nd
2,2',3,3',4,4'-hexachlorobiphenyl (no. 128)		nd	nd	nd	nd	nd	nd
2,2',3,4,4',5'-hexachlorobiphenyl (no. 138)		nd	nd	1	1	1	nd
2,2',4,4',5,5'-hexachlorobiphenyl (no. 153)		nd	nd	nd	1	0.8	nd
2,2',3,3',4,4',5-heptachlorobiphenyl (no. 170)		nd	nd	nd	nd	0.3	nd
2,2',3,4,4',5,5'-heptachlorobiphenyl (no. 180)		nd	nd	nd	nd	nd	nd
2,2',3,4',5,5',6-heptachlorobiphenyl (no. 187)		nd	nd	nd	nd	nd	nd
2,2',3,3',4,4',5,6-octachlorobiphenyl (no. 195)		nd	nd	nd	nd	nd	nd
2,2',3,3',4,4',5,5',6-nonachlorobiphenyl (no. 206)		nd	nd	nd	nd	nd	nd
2,2',3,3',4,4',5,5',6,6'-decachlorobiphenyl (no. 209)		nd	nd	nd	nd	nd	nd

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* The accepted numbering system for PCB isomers as developed by Ballschmiter and Zell (1980).