Uncertainty estimates

The fixed and relative standard deviation (\(s\) and \(v\)) derived from the ICES data base (extraction date: 15 February 2019) and used to estimate missing uncertainties are tabulated below for biota, sediment and water. The unit only applies to the fixed standard deviation; the relative standard deviation is unitless. The notes at the bottom of each table describe the approach taken when there were insufficient data in the ICES data base to derive the fixed and relative standard deviations.


Biota

group code name unit fixed sd relative sd
Metals CD Cadmium \(\mu\)g/kg 0.6667 0.0750
HG Mercury \(\mu\)g/kg 0.7833 0.0791
PB Lead \(\mu\)g/kg 3.0530 0.1101
CU Copper \(\mu\)g/kg 4.6232 0.0793
ZN Zinc \(\mu\)g/kg 50.0000 0.0726
PAH (parent) NAP Naphthalene \(\mu\)g/kg 0.1667 0.1462
PA Phenanthrene \(\mu\)g/kg 0.1567 0.1505
ANT Anthracene \(\mu\)g/kg 0.0933 0.1326
DBT Dibenzothiophene \(\mu\)g/kg 0.1317 0.0665
FLU Fluoranthene \(\mu\)g/kg 0.1477 0.0789
PYR Pyrene \(\mu\)g/kg 0.1098 0.0876
BAA Benzo[a]anthracene \(\mu\)g/kg 0.0933 0.1497
CHR Chrysene \(\mu\)g/kg 0.1037 0.1186
BAP Benzo[a]pyrene \(\mu\)g/kg 0.0967 0.1564
BGHIP Benzo[g,h,i]perylene \(\mu\)g/kg 0.1296 0.1432
ICDP Indeno[123-cd]pyrene \(\mu\)g/kg 0.1115 0.1913
Chlorobiphenyls CB28 CB28 \(\mu\)g/kg 0.0333 0.1342
CB52 CB52 \(\mu\)g/kg 0.0333 0.1557
CB101 CB101 \(\mu\)g/kg 0.0233 0.1171
CB105 CB105 \(\mu\)g/kg 0.0150 0.1573
CB118 CB118 \(\mu\)g/kg 0.0267 0.1216
CB126 CB126 \(\mu\)g/kg 0.0333 0.1557
CB138 CB138 \(\mu\)g/kg 0.0333 0.1041
CB153 CB153 \(\mu\)g/kg 0.0300 0.1098
CB156 CB156 \(\mu\)g/kg 0.0073 0.1390
CB169 CB169 \(\mu\)g/kg 0.0333 0.1557
CB180 CB180 \(\mu\)g/kg 0.0333 0.1202
Organo-bromines BDE28 BDE28 \(\mu\)g/kg 0.0062 0.2456
BDE47 BDE47 \(\mu\)g/kg 0.0106 0.1627
BDE99 BDE99 \(\mu\)g/kg 0.0067 0.1711
BD100 BD100 \(\mu\)g/kg 0.0067 0.1820
BD153 BD153 \(\mu\)g/kg 0.0067 0.1445
BD154 BD154 \(\mu\)g/kg 0.0067 0.1761
HBCD HBCD \(\mu\)g/kg 0.3630 0.2296
Pesticides DDEPP DDE (p,p’) \(\mu\)g/kg 0.0333 0.1541
HCB Hexachlorobenzene \(\mu\)g/kg 0.0167 0.1586
HCHA alpha-HCH \(\mu\)g/kg 0.0133 0.2113
HCHG gamma-HCH \(\mu\)g/kg 0.0135 0.2036
Organo-metals DBSN+ Dibutyltin ion \(\mu\)g/kg 0.7400 0.1559
DPSN+ Diphenyltin ion \(\mu\)g/kg 0.7400 0.1559
MBSN+ Monobutyltin ion \(\mu\)g/kg 0.7400 0.1559
MPSN+ Monophenyltin ion \(\mu\)g/kg 0.7400 0.1559
TBSN+ Tributyltin ion \(\mu\)g/kg 0.7400 0.1559
TPSN+ Triphenyltin ion \(\mu\)g/kg 0.7400 0.1559
Dioxins TCDD 2,3,7,8-tetrachloro-dibenzo[b,e][1,4]dioxin \(\mu\)g/kg 0.0000 0.0939
CDF2T 2,3,7,8-tetrachloro-dibenzofuran \(\mu\)g/kg 0.0000 0.1299
Perfluoronated compounds PFOS Perfluorooctanyl sulphonic acid \(\mu\)g/kg 0.0667 0.0694
Biological effects EROD Ethoxyresorufin-O-deethylase pmol/min/mg protein 1.0000 0.0588
PYR1OH 1-hydroxy pyrene ng/ml 0.2167 0.1000
PYR1OHEQ 1-hydroxy pyrene equivalent \(\mu\)g/ml 0.0000 0.2000
PA1OH 1-hydroxy phenanthrene ng/ml 0.0000 0.2000
NAP2OH 2-hydroxy naphthalene ng/ml 0.0000 0.2000
BAP3OH 3-hydroxy benzo(a)pyrene ng/ml 0.0000 0.2000
ACHE Acetylcholine esterase activity nmol/min/mg protein 0.0000 0.4000
ALAD Aminolevulinic acid dehydratase ng/min/mg protein 0.0000 0.2000
GST Glutathionine transferase nmol/min/mg protein 0.0000 0.2000


  • CB126, CB169: the fixed and relative standard deviations (\(s\) and \(v\)) were imputed from CB52
  • DBSN+, MBSN+, TPSN+, DPSN+ and MPSN+: \(s\) and \(v\) were imputed from TBSN+
  • PA1OH, BAP3OH: \(v\) was set to 0.2 (the only uncertainty in the data base) and \(s\) was set to 0 (no limits of detection in the data base)
  • NAP2OH, PYR1OHEQ: \(s\) and \(v\) were set to 0 and 0,2 for compatability with PA1OH and BAP3OH (no uncertainties or limits of detection in the data base)
  • ACHE: \(v\) was set to 0.4 (median value) and \(s\) was set to 0 (no limits of detection)
  • GST: \(v\) was set to 0.2 (median value) and \(s\) was set to 0 (no limits of detection)
  • ALAD: \(s\) and \(v\) were set to 0 and 0.2 based on typical values for other biological effects (no uncertainties or limits of detection)
  • Scope for Growth (not tabulated above): this is assessed on the untransformed scale (not the logarithmic scale) and \(s\) and \(v\) were set to 0.1 and 0


Sediment

group code name unit fixed sd relative sd
Metals CD Cadmium mg/kg 0.0100 0.0805
HG Mercury mg/kg 0.0017 0.0784
PB Lead mg/kg 0.0667 0.0741
AS Arsenic mg/kg 0.1000 0.0660
CR Chromium mg/kg 0.1667 0.0771
CU Copper mg/kg 0.0833 0.0673
NI Nickel mg/kg 0.1100 0.0618
ZN Zinc mg/kg 0.3333 0.0616
PAH (parent) NAP Naphthalene \(\mu\)g/kg 0.3333 0.0900
PA Phenanthrene \(\mu\)g/kg 0.3333 0.0854
ANT Anthracene \(\mu\)g/kg 0.1667 0.0806
DBT Dibenzothiophene \(\mu\)g/kg 0.0467 0.0747
FLU Fluoranthene \(\mu\)g/kg 0.3333 0.0676
PYR Pyrene \(\mu\)g/kg 0.3333 0.0667
BAA Benzo[a]anthracene \(\mu\)g/kg 0.3333 0.0911
CHR Chrysene \(\mu\)g/kg 0.3333 0.0852
BAP Benzo[a]pyrene \(\mu\)g/kg 0.3333 0.0912
BGHIP Benzo[g,h,i]perylene \(\mu\)g/kg 0.3333 0.0930
ICDP Indeno[123-cd]pyrene \(\mu\)g/kg 0.3333 0.0973
PAH (alkylated) NAPC1 C1 Naphthalenes \(\mu\)g/kg 0.0333 0.0947
NAPC2 C2 Naphthalenes \(\mu\)g/kg 0.0233 0.0683
NAPC3 C3 Naphthalenes \(\mu\)g/kg 0.0333 0.1001
PAC1 C1 Phenanthrenes \(\mu\)g/kg 0.0583 0.0926
PAC2 C2 Phenanthrenes \(\mu\)g/kg 0.0333 0.0703
PAC3 C3 Phenanthrenes \(\mu\)g/kg 0.0300 0.0951
DBTC1 C1 Dibenzothiophene \(\mu\)g/kg 0.0250 0.0787
DBTC2 C2 Dibenzothiophene \(\mu\)g/kg 0.0133 0.1039
DBTC3 C3 Dibenzothiophenes \(\mu\)g/kg 0.0133 0.0770
Chlorobiphenyls CB28 CB28 \(\mu\)g/kg 0.0227 0.1098
CB52 CB52 \(\mu\)g/kg 0.0333 0.1230
CB101 CB101 \(\mu\)g/kg 0.0333 0.1095
CB105 CB105 \(\mu\)g/kg 0.0100 0.0999
CB118 CB118 \(\mu\)g/kg 0.0333 0.1072
CB138 CB138 \(\mu\)g/kg 0.0333 0.1015
CB153 CB153 \(\mu\)g/kg 0.0333 0.1080
CB156 CB156 \(\mu\)g/kg 0.0033 0.1031
CB180 CB180 \(\mu\)g/kg 0.0333 0.1175
Organo-bromines BDE28 BDE28 \(\mu\)g/kg 0.0067 0.2827
BDE47 BDE47 \(\mu\)g/kg 0.0067 0.0582
BDE66 BDE66 \(\mu\)g/kg 0.0100 0.0823
BDE85 BDE85 \(\mu\)g/kg 0.0067 0.0862
BDE99 BDE99 \(\mu\)g/kg 0.0067 0.1921
BD100 BD100 \(\mu\)g/kg 0.0100 0.0669
BD153 BD153 \(\mu\)g/kg 0.0067 0.1848
BD154 BD154 \(\mu\)g/kg 0.0067 0.0626
BD183 BD183 \(\mu\)g/kg 0.0067 0.3052
BD209 BD209 \(\mu\)g/kg 0.5200 0.1399
Organo-metals DBSN+ Dibutyltin ion \(\mu\)g/kg 0.4667 0.1618
DPSN+ Diphenyltin ion \(\mu\)g/kg 0.4667 0.1618
MBSN+ Monobutyltin ion \(\mu\)g/kg 0.4667 0.1618
MPSN+ Monophenyltin ion \(\mu\)g/kg 0.4667 0.1618
TBSN+ Tributyltin ion \(\mu\)g/kg 0.3333 0.1221
TPSN+ Triphenyltin ion \(\mu\)g/kg 0.3333 0.1221
Normalisers AL Aluminium % 0.0053 0.1020
CORG Organic Carbon % 0.0100 0.0839


  • MBSN+: the fixed and relative standard deviations (\(s\) and \(v\)) were imputed from DBSN+
  • MPSN+, DPSN+, TPSN+: \(s\) and \(v\) were imputed from MBSN+, DBSN+ and TBSN+ respectively


Water

group code name unit fixed sd relative sd
Metals CD Cadmium \(\mu\)g/l 0.0033 0.1500
PB Lead \(\mu\)g/l 0.0020 0.0505
NI Nickel \(\mu\)g/l 0.0067 0.1011
PAH (parent) BAP Benzo[a]pyrene ng/l 0.0014 0.1323
Organo-metals TBSN+ Tributyltin ion ng/l 0.0000 0.1050
Perfluoronated compounds PFOS Perfluorooctanyl sulphonic acid ng/l 0.0000 0.2500


  • PFOS: the fixed and relative standard deviations (\(s\) and \(v\)) were set to 0 (no limits of detection in the data base) and 0.25 (the only uncertainty in the data base)
  • TBSN+: \(s\) and \(v\) were set to 0 (no limits of detection) and 0.105 (only uncertainty)