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DET NORSKE VERITAS 

Report 

Environmental Sediment Survey 

Frigg 2010 

Total E&P Norge AS 

Report No./DNV Reg No.: 2010-1479/ 12O31ER-5 

Rev 01, 2010-11-30


Report for Total E&P Norge AS 

Environmental Sediment Survey Frigg 2010 

Table of Contents 

DNV Reg. No.: 12O31ER-5 

Revision No.: 01 

Date : 2010-11-30 Page ii of iii 

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CONCLUSIVE SUMMARY / SAMMENDRAG.................................................................. 1 

1 INTRODUCTION ............................................................................................................. 3 

2 MATERIALS AND METHODS...................................................................................... 4 

2.1 Field work .................................................................................................................. 4 

2.2 Macrobenthic analyses ............................................................................................... 6 

2.2.1 Macrobenthic analyses – an introduction ............................................................ 6 

2.2.2 Sorting and species identification........................................................................ 6 

2.2.3 Analytical methods .............................................................................................. 7 

2.2.4 Comparison of taxonomical data between years ................................................. 7 

2.2.5 Quality assurance................................................................................................. 8 

2.3 Chemical analysis and physical characterization of the sediments............................ 8 

2.3.1 Sediment characterization.................................................................................... 8 

2.3.1.1 Grain size distribution................................................................................. 8 

2.3.1.2 Total organic matter .................................................................................. 11 

2.3.2 Chemical analyses ............................................................................................. 11 

2.3.2.1 Hydrocarbons ............................................................................................ 11 

2.3.2.2 Metals........................................................................................................ 13 

2.3.2.3 Determination and quantification limits.................................................... 14 

2.3.3 Quality assurance............................................................................................... 14 

2.4 Deviation from Guidelines....................................................................................... 14 

3 RESULTS ......................................................................................................................... 15 

3.1 Sediment characterization ........................................................................................ 15 

3.1.1 Grain size distribution........................................................................................ 15 

3.1.2 Total organic matter (TOM) .............................................................................. 15 

3.2 Chemical analysis..................................................................................................... 16 

3.2.1 Hydrocarbons..................................................................................................... 16 

3.2.2 Metals ................................................................................................................ 18 

3.3 Biological analysis ................................................................................................... 21 

3.4 Conclusions .............................................................................................................. 26 

4 REFERENCES ................................................................................................................ 27 

Appendix 1 Extract from Survey Report 

Appendix 2 Test Report – Sampling and biological analyses 

Appendix 3 Analysis Report - Molab






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Preface 

The environmental sediment survey at Frigg in 2010 has been carried out jointly by Det Norske 

Veritas and Molab, on behalf of Total E&P Norge AS. The work has been carried out as a part of 

the regional environmental monitoring in Region III (Oseberg/Troll) coordinated through Statoil. 

Total’s representative has been Laurence Pinturier 

Personnel 

Field work: Sam-Arne Nøland survey leader, Thomas Møskeland (shift leader), Øyvind 

Fjukmoen (shift leader), Marte Braathen, Christian Volan (all DNV) and Gunn Mari Michaelsen 

and Odd Strandvoll (both Molab). 

Sediment analyses: 

Grain size distribution: Terje Kolberg, Eli Ellingsen 

TOM analysis: Terje Kolberg, Eli Ellingsen 

Metal analyses: Gunn Mari Michaelsen, Terje Pedersen, Hanne Skog 

Lillevik, Wenche Brennbakk 

THC analysis: Daniel Perez, Anna Jønsson, Tove Kristin Dokka Torstensen 

Selected hydrocarbon analyses: Tove Kristin Dokka Torstensen 

The grain size distribution is analyzed at Molab AS, section Glomfjord. The organic chemical 

analyses are performed at Molab AS, section Oslo, the preparation of the inorganic samples are 

performed at Molab AS, section Mo i Rana, and due to a minor fire the instrumental analyses was 

carried out by a co-operator, ALS. 

Biological analyses: 

Species identification: Thomas Møskeland, DNV (Crustacea) 

Amund Ulfsnes, DNV (Echinodermata/mollusca) 

Per Bie Wikander, Molltax (Mollusca) 

Øystein Stokland, Marine Bunndyr (Polychaeta, varia) 

Sorting has taken place at DNV’s Biology Laboratory. Christian Volan and Ludvig Søgnen 

Jensen have been in charge of the sorting. 

Univariate analyses: Amund Ulfsnes, Thomas Møskeland 

Multivariate analyses: Amund Ulfsnes 

Report preparation: 

Chemistry: Tove Kristin Dokka Torstensen 

Biology: Amund Ulfsnes, Sam-Arne Nøland 

Main Report: Sam-Arne Nøland 

Verification: Øyvind Fjukmoen 

Project Manager: Sam-Arne Nøland




CONCLUSIVE SUMMARY / SAMMENDRAG 

SUMMARY 



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This report presents the results from the environmental survey at Frigg in 2010. Det Norske 

Veritas and Molab AS carried out the survey jointly on the behalf of Total E&P Norge AS. 

Apart from the concrete substructures left in place, all installations removed and brought to 

shore for material recovery. This survey is part of the mandatory environmental surveys 

described in the Frigg Field Cessation Plan and to be undertaken before and after 

decommissioning work. The first mandatory environmental survey took place in 2003 before 

the start of the decommissioning work; the second took place in 2006 during 

decommissioning. 

The main results from the survey at Frigg in 2010 are presented below. 

The major sediment component is sand (94-99 %), and all samples are classified as fine sand. 

The content of silt and clay is low, between 0.5 and 2.2 %. The content of gravel is 2.2 % for 

station FRI1 and 4.9 % for FRI25. For the remaining stations the content of gravel is LSC, and 

these elevated levels are most pronounced at stations FRIX1, -1, -3 and -4 where the fauna is 

slightly different from the other field stations. Compared with previous surveys it is some 

minor differences, but it is not found any trend, and overall there were no major differences 

compared to previous surveys. A summary of the results are shown in the table below. 

Summary of the chemical analyses, sediment characterization and biology. 

Analytical method Parameter Variation at Frigg 2010 

Sediment characterization 

• Grain size distribution Silt and clay (%): 0.5 - 2.2 

Sand (%): 99.5 - 93.4 

Gravel (%): 0 - 4.9 

Median particle diameter (φ): 2.35 - 2.54 

• Total organic matter (%) TOM: 0.45 - 0.76 

Chemical analyses 

• Hydrocarbons (mg/kg) THC: 4 - 11 

NPD: 0.08 - 0.08 

PAH: 0.142 - 0.142 

• Metals (mg/kg) Ba: 28 - 189 

Cd: < 0.03 - 0.06 

Cr: 4.2 - 12.8 

Cu: 1.1 - 26.5 

Hg: < 0.01 - 0.02 

Pb: 3.2 - 53.8 

Zn: 6 - 290






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Fauna 

Shannon-Wiener H’ 3.5 - 5.3 

Rarefaction ES100 25 - 39 

Pielou’s evenness J 0.56 - 0.80 

SAMMENDRAG 

Hovedresultatene fra etterkantundersøkelsen på Frigg i 2010 er presentert nedenfor. 

Sedimentene består hovedsakelig av sand (94-99 %), og alle prøvene blir klassifisert som fin 

sand. Innholdet av silt og leire er lavt, og varierer mellom 0,5-2,2 %. Innholdet av grus er 2,2 

% på stasjon FRI1 og 4,9 % på stasjon FRI25, på de øvrige stasjonene er innholdet av grus < 

0,5 %. Innholdet av totalt organisk materiale er lavt (0,45-0,76 %). 

Totalt innhold av THC varierer fra 4-11 mg/kg. Det er valgt å sammenligne med LSC-verdien 

for subregion nord fra undersøkelsen på Region II i 2006 (LSC north 97-06). Det er ikke 

funnet konsentrasjoner av THC som overstiger LSC-verdien ved noen av stasjonene. På 

stasjon FRI3 er konsentrasjonen av PAH og NPD i sjiktet 1-3 cm hhv 4,24 og 1,80 mg/kg, 

THC-konsentrasjonen i denne prøven er 15 mg/kg. 

Konsentrasjonene av Ba i området er 28-189 mg/kg. Tre stasjoner har Ba-konsentrasjoner 

over LSC-nivå. Flere av stasjonene har metallkonsentrasjoner over LSC, mest markert på 

stasjonene FRIX1, -1, -3 og -4 der faunaen er litt forskjellig fra de andre feltstasjonene. 

Sammenlignet med tidligere undersøkelser er det noen mindre forskjeller, men det er ikke 

funnet noen trend. Samlet sett er det små variasjoner i resultatene fra 2010 sammenlignet med 

de senere års undersøkelser (2003 og 2006). Et sammendrag av resultatene er gitt i tabellen 

under. 

Sammendrag av resultatene fra den kjemiske analysen og sedimentkarakteriseringen 

Analyse Parameter Variasjon på Frigg 2010 

Sedimentkarakterisering 

• Kornstørrelsesfordeling Silt og leire (%): 0,5 - 2,2 

Sand (%): 99,5 - 93,4 

Grus (%): 0 - 4,9 

Median partikkeldiameter (φ): 2,35 - 2,54 

• Totalt organisk materiale (%) TOM: 0,45 - 0,76 

Kjemisk analyse 

• Hydrokarboner (mg/kg) THC: 4 - 11 

NPD: 0,08 - 0,08 

PAH: 0,142 - 0,142 

• Metaller (mg/kg) Ba: 28 - 189 

Cd: < 0,03 - 0,06 

Cr: 4,2 - 12,8 

Cu: 1,1 - 26,5 

Hg: < 0,01 - 0,02 

Pb: 3,2 - 53,8 

Zn: 6 - 290 

Fauna 

Shannon-Wiener H’ 3,5 - 5,3 

Rarefaction ES100 25 - 39 

Pielou’s jevnhet J 0,56 - 0,80




1 INTRODUCTION 



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Det Norske Veritas and Molab AS have carried out in 2010 an environmental sediment survey 

within the 500m zone of the Frigg Field on behalf of Total E&P Norge AS. 

Frigg is located in block 25/1. Production at the field started in September 1977 and stopped 

in October 2004. A total of 14 wells were permanently plugged and abandoned between 

October and December 2004. The offshore removal works of the facilities on Frigg 

commenced in March 2005. Apart from the three concrete substructures left in place, all 

installations and pipelines and cables between the Frigg platforms have been removed and 

brought to shore for material recovery. 

All offshore removal works were completed in 2009. The post-removal work performed 

within the Cessation Project has been: 

- a survey to identify the sea floor debris (target) to be removed (Jan-Feb 2010) 

- removal of the targets identified (April-Mai 2010) 

- a gravel dumping survey to fill in holes at DP2/QP/DP1 (July 2010) 

- a final bottom trawling test (September 2010) 

The first of the mandatory environmental surveys linked to the decommissioning of the Frigg 

Field, to be undertaken before and after completion of the decommissioning work, was carried 

out in 2003. The last mandatory sediment survey was scheduled for 2009 as part of the 

regional environmental monitoring survey in Region II in the Norwegian Sector of the North 

Sea. As the decommissioning work offshore was foreseen completed within 2009, Total E&P 

Norge applied for and obtained approval from the Norwegian Climate and Pollution Agency 

(KLIF) to postpone the last mandatory survey to 2010. An environmental sediment survey 

was also carried out during the decommission work in 2006 as part of the Region II 

monitoring. 

The 2010 sediment survey has been performed after the debris had been removed. 

Seabed Seabed sampling sampling 

2003 2004 2005 2006 2007 2008 2009 2010 

Gas production stopped 

Gas production stopped 

Offshore Offshore removal removal started started 


Offshore Offshore removal removal completed completed 

Debris Debris clearance clearance 


The 2010 survey program was based on the results obtained from the previous monitoring 

surveys and included both biology and chemistry analyses. The sampling stations were 

selected based on 2003 and 2006 program.






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Discharges history at Frigg between 2003 and 2009 (all numbers in tons with the exception of 

hydraulic oil in litre). 

SFT class description SFT* 2003 2004 2005 2006 2007 2008 2009 

Number of plugged wells 14 0 0 0 0 0 0 

Water green 5.74 5.67 - 0 0.164 0 0 

PLONOR Chemicals green 8.74 10.0 - 0 0 0 0 

BioDeg




The main equipment used was: 

• van Veen grabs 

• Reception table for grab in stainless steel 

• Washing table for biological samples 

• two sets of sieves for washing of biological samples 



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Sampling was carried out in accordance with accredited procedures described in Handbook 

for the Biology laboratory quality system; sampling of marine sediment and soft bottom 

analyses. It was emphasized that the sediment surface in the samples should be undisturbed 

and that the washing/sieving of the fauna samples was carried out gently. Animals were fixed 

in formaldehyd (4 % neutralized with hexamine), added pink Bengal and stored in plastic 

buckets. All samples were double labelled and packed in solid boxes to avoid damage to the 

samples. 

The field work was carried out in accordance to the survey program. 

The vessel was provided with dynamic positioning equipment. This means very precise 

positioning, and that the vessel can be kept in the exact same position over time. The variance 

in positioning was better than ± 5 m. 

Figure 2-1 Frigg sampling stations 2010. The Reference station FRI10R is not included.




2.2 Macrobenthic analyses 

2.2.1 Macrobenthic analyses – an introduction 



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The macrobenthic fauna considered in this survey is found living either in, or on sand, silt or 

clay sediments. This fauna comprises the following main taxonomic groups: Polychaeta, 

Crustacea, Mollusca, Echinodermata and Varia (remaining groups). Only animals more than 1 

mm (macrobenthos) are included in the analysis. 

Macrobenthic fauna are traditionally included in offshore environmental monitoring. The 

reason for this is that the study of benthic communities can give an indication of the effects of 

pollution from offshore activities, while chemical monitoring of sediments is aimed at 

assessing the dispersion and concentration levels of pollutants in the vicinity of offshore 

installations. The benthic fauna is a suitable biological parameter for monitoring the effects of 

pollution since most of the species have limited mobility and changes in species composition 

and densities of individuals can therefore easily be identified. The distribution of the fauna 

can be related to natural variations in environmental parameters such as depth and type of 

sediment, but also anthropogenic factors such as discharges of drilling fluids, cuttings and 

others, including accidental releases of oil and physical disturbances. 

2.2.2 Sorting and species identification 

In the laboratory the samples were washed on 1 mm sieves with (circular holes) to remove 

formaldehyde and remaining fine sediment, and then sorted by hand under a magnifying 

glass. The animals were split into the major taxonomic groups; Echinodermata, Polychaeta, 

Crustacean, Mollusca and Varia and transferred to 70% ethanol before further identification 

was undertaken. 

Apart from the exceptions detailed below, all animals were identified to the lowest possible 

taxonomic level (i.e. generally to species level) and the number of individuals per taxon in 

each sample was recorded. 

In accordance with the Activities Regulations, Nematoda, Foraminifera and colonial 

organisms (i.e. Porifera and Bryozoa), were excluded from any data analyses. Some taxa (i.e. 

Platyhelminthes, Nemertini, Tunicata and Tanaidacea) were quantified but were not identified 

further. A number of representative specimens of each of the species/taxa identified were 

included in our reference collection.




2.2.3 Analytical methods 



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The statistical and mathematical methods utilised to aid interpretation of the benthic fauna 

data are summarised below. 

• Abundance ratio 

• Shannon-Wiener's diversity index, H' (Shannon & Weaver 1963) 

• Evenness calculated by Pielou's "evenness" J' (Pielou 1969) 

• Expected number of species in a sample of 100 individuals (ES100) 

• Fauna similarity between stations by Bray-Curtis dissimilarity index d (Bray & Curtis 

1957). The resulting similarity matrix was utilised in multivariate analyses in order to group 

stations and assess gradients in the benthic communities. These methods were: hierarchical 

agglomerative classification with group-average sorting (Lance & Williams 1966), ordination 

with non-metric Multi-Dimensional Scaling (MDS), (Shepard 1962, Kruskal 1964). 

Classification and MDS ordination were carried out using the programme-package PRIMER 

(Plymouth Routines In Multivariate Ecological Research). 

The raw data is stored in MOD; MiljøOvervåkingsDatabasen (Environmental Monitoring 

Database). 

2.2.4 Comparison of taxonomical data between years 

Comparison of data at species level between years (trend analyses) involves taxonomic 

sources of errors which have to be minimized in order to get consistent data when using e.g. 

multivariate analyses. Comparison of univariate data, such as biodiversity indices between 

years does not raise the same problem and gives minimal or small fluctuations. Main sources 

of errors when using multiple data sets at species level are sampling methodology and 

variations between taxonomists. 

Species-level identification of all specimens is practically not possible. A number of obstacles 

are always present, e.g. the state of knowledge of the taxonomy of infaunal species. Some 

groups are comparatively well known, while others are relatively unknown. A substantial 

number of unrecognized species may be assumed to be present in the samples. These factors, 

along with various levels of experience and areas of expertise among taxonomists, are present 

in any survey of this kind, and will directly impact the survey results (Montagne & Bergen, 

1996).




2.2.5 Quality assurance 



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Procedures including routines for quality assurance related to sorting, species identification 

and recording of macrobenthos samples are given in DNV’s Biolaboratoriets Kvalitetssystem, 

Prøvetaking av marint sediment og bløtbunnsanalyser. A brief summary is given here: 

All samples are recorded and double-labelled during fieldwork, and transported in wooden 

boxes in a steel container. During sorting in the laboratory all relevant information about each 

sample is recorded (who sorted what and when, time spent, number of bottles etc.). After 

sorting, each sediment sample is examined for remaining organisms by approved personnel. 

Each identifier establishes a separate reference collection of species for comparison purpose. 

To maintain traceability each identifier signs a log to keep track over which grab samples and 

animal group(s) he or she has been working on. The project reference collection is kept at 

DNV, Høvik. 

2.3 Chemical analysis and physical characterization of the sediments 

Analytical parameters 

Analysis Parameter 

Sediment characterization 

• Grain size distribution - Distribution of pelite (< 63 µm) and sand (> 63 µm) 

- Cumulative weight% distribution from 63-2000 µm 

- Median particle diameter (Mdφ), standard deviation (SDφ), 

skewness (Skφ) and kurtosis (Kφ) 

• Total organic matter (TOM) - % TOM in the sediment 

Chemical analyses 

• Hydrocarbons - THC, sum C12-C35 

- NPD, naphthalenes, phenanthrenes and dibenzothiophenes 

sum and single compounds 

- PAH, 16 EPA compounds 

sum and single compounds 

• Metals - Ba, Cd, Cr, Cu, Hg, Pb and Zn 

2.3.1 Sediment characterization 

2.3.1.1 Grain size distribution 

The method for grain size distribution analysis is described in Buchanan (1984). The analysis 

includes a fast mechanical separation of the sand fraction (> 63 µm) from the silt and clay 

fraction. The sand fraction is then dried and sieved over a series of graded sieves. 

From each station three subsamples (0-5 cm) from separate grab samples were mixed and 

homogenized, and one homogenized sample from each station was analyzed. Approximately 

10 g of the sample was weighed to the nearest 0.01 g before wet sieving on a 63 µm sieve.






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The fraction passing this sieve was transferred to a plastic bottle. A separate sample was 

weighed and dried for dry weight determination. The percentage of silt and clay (< 63 µm) of 

total dry weight in the sample was then calculated. 

The fraction > 63 µm was dried at 100 °C for 12 hours and sieved over a series of 

Wenthworth graded sieves (Endecott Test Sieves, London) with mesh sizes ranging from 

2000 to 63 µm. The sample was shaken on a Retsch KG testing sieve shaker for ten minutes. 

The weight retained upon each sieve was determined to the nearest 0.01 g. The weight of all 

size fractions was used to prepare cumulative weight% distribution tables for each sampling 

site. This table was then used in calculating the median particle diameter and deviation, 

skewness and kurtosis of the particle size distribution. As the grain size distribution was not 

determined for the fraction < 63 µm, the φ-value for this fraction was given the value 8. The 

values for Mdφ, SDφ, Skφ, and Kφ should therefore be considered as extrapolated results. 

The mathematical expressions are given below. 

Mdφ (median particle diameter): 

Mdφ = the φ-value of the midpoint (i.e. 50 %) of the cumulative % weight curve. This 

measures the central tendency of the size frequency distribution. 

SDφ (standard deviation): 

SDφ estimated as: 

φ84 

- φ16 

SDφ 

= 

4 

φ95 

− φ5 

+ 

6. 

6 

SDφ gives a measure of the spread in particle size around the Mdφ, and thus is a 

measure of the degree of sorting of the particles. 

Skφ (skewness): 

Kurtosis, Kφ: 

Skφ estimated as: 

φ16 

+ φ84 

− 2Mdφ 

φ5 

+ φ95 

− 2Mdφ 

Skφ 

= 

+ 

2 

( φ84 

− φ16) 

2( 

φ95 

− φ5) 

Skφ describes the symmetry of the spread in distribution around the Mdφ. A 

completely symmetrical distribution will have Skφ = 0, negative values indicate 

displacement of the distribution curve towards coarser sediment, and positive Skφ 

indicates displacement towards finer sediment. 

Kφ estimated as: 

φ95 

- φ5 

Kφ 

= 

2. 

44 

( φ75 

− φ25) 

Kφ describes the toppedness of the distribution, i.e. how heavy the tails are (expressed 

by the φ5 and φ95 fractions) compared to the central portion of the distribution. For a 

normal distribution the expression above will give a Kφ value of 1.00.






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Interpretation tables are enclosed in Table 2-1 and Table 2-2. 

Table 2-1 Grain size distribution. Interpretation of descriptive indiced (Buchanan, 1984). 

Parameter Index value Verbal classification 

Standard deviation (SDφ) < 0.35 Very well sorted 

0.25-0.50 Well sorted 

0.50-0.70 Moderately well sorted 

0.70-1.00 Moderately sorted 

1.00-2.00 Poorly sorted 

2.00-4.00 Very poorly sorted 

> 4.00 Extremely poorly sorted 

Skewness (Skφ) +1.00 to +0.30 Strongly fine skewed 

+0.30 to +0.10 Fine skewed 

+0.10 to -0.10 Symmetrical 

-0.10 to -0.30 Coarse skewed 

-0.30 to -1.00 Strongly coarse skewed 

Kurtosis (Kφ) +4.5 Silt and clay (pelite)




2.3.1.2 Total organic matter 



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30-40 g of wet sediment was weighed into a porcelain dish. The sample was heated at 105 °C 

for minimum 20 hours, cooled and weighed, and then heated to 480 °C for minimum 16 

hours. The percent weight loss after the combustion was then calculated, and this value 

represents the total organic matter content (TOM) in the sediment. Two sediment standards 

with known TOM and calcium carbonate were heated together with the sediment samples. 

The calcium carbonate was used as a cross check on potential weight loss due to the 

conversion of carbonate to oxide. 

2.3.2 Chemical analyses 

2.3.2.1 Hydrocarbons 

The chemical analysis comprises determination of the total hydrocarbon content from n-C12 to 

n-C35 (THC) and selected hydrocarbons (NPD and PAH). The analytical steps are shown in 

Figure 2-2. The sediment samples were worked up by saponification, followed by extraction 

with dichloromethane. The extract was then separated in a non-polar and a polar fraction 

using a silica column. The non-polar fractions were analyzed for hydrocarbons by use of gas 

chromatography (GC). 

Sample preparation procedure: 

The sediment samples were collected in Rilsan bags. Homogenization was performed by 

stirring in the Rilsan bag, and small portions of the wet sample were taken randomly giving a 

total weight of about 50 g. Internal standards were added. The sample was refluxed with KOH 

in methanol for 2 hours. The mixture was then extracted by dichloromethane. The extract was 

evaporated to approximately 1 mL, re-dissolved in hexane and fractionated (cleaned up) on 

Bond-Elut silica columns (Isolute, International Sorbent Technology). The hexane fraction 

was concentrated and analyzed for hydrocarbons. 

An aliquot of the wet and homogenized sediment was weighed and dried for 48 hours at 105 

°C, for determination of the dry weight. 

Quantification: 

THC (total hydrocarbon content) was determined by gas chromatography with flame 

ionization detector, in the boiling range of n-C12 alkane to n-C35 alkane. The quantification 

was carried out according to an external standard of the reference oil, HDF 200, a drilling 

mud base oil. The reported values were corrected for background levels from procedural 

blanks. 

NPD and PAH were determined by gas chromatography/mass spectrometry operated in the 

selected ion recording mode (SIR). The quantification was carried out according to the added 

internal standards and integration of the molecular ions. The following compounds were 

determined: Naphthalene, phenanthrene/anthracene, dibenzothiophene and their C1-, C2- and 

C3-alkylated derivatives, acenaphtene, acenaphthylene, fluorene, pyrene/fluoranthene,






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chrysene/ triphenylene, benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene/ 

benzo(j)fluoranthene/ benzo(k)fluoranthene, benzo(g,h,i)perylene, indeno(1,2,3-cd)pyrene 

and dibenzo(a,h)anthracene. 

Reference compounds were available for all the aromatic compounds. For each of the C1 - C3 

alkyl homologue groups one of the isomers was used as reference in the quantification. The 

reported values were corrected for background levels from procedural blanks. 

GC-FID conditions: 

Gas chromatograph : Perkin Elmer Autosystem XL 

Column : 12 m x 0.20 mm i.d., fused silica, crosslinked with dimethyl 

silicone 

Temperatures: Column : 50 °C (2 min) - 20 °C/min - 350 °C (8 min) 

Injector : 320 °C 

Detector : 350 °C 

Carrier gas : Helium 

Injection volume : 1 µL 

Data system : TotalChrom 6.2 

HDF 200 : 0.1 – 10 mg/mL hexane 

GC/MS conditions: 

Mass spectrometer : Clarus 500 Mass Spectrometer, Perkin Elmer 

Data system : TurboMass 

Gas chromatograph : Clarus 500 Gas Chromatograph, Perkin Elmer 

Column: : 30 m fused silica, 0.25 µm DB-5ms 

Temperatures: Column : 40 °C (2 min) - 20 °C/min - 120 °C - 

Injector : 300 °C 

Ion source : 180 °C 

Carrier gas : Helium 

10 °C/min - 300 °C (15 min) 

Ionization : Electron impact, 70 eV 

Masses (m/z) 

C0-C3 naphthalene : 128, 141, 156, 170 

C0-C3 phenanthrene : 178, 192, 206, 220 

C0-C3 dibenzothiophene : 184, 198, 212, 226 

PAH : 152, 153, 166, 202, 228, 252, 276, 278 

Deuterated standards : 136, 164, 188, 212, 240, 264 

Injection volume : 1 µL






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Figure 2-2 Flow scheme of essential steps in the hydrocarbon analyses of sediments. 

2.3.2.2 Metals 

The metal analyses include determination of Ba, Cd, Cr, Cu, Hg, Pb and Zn after digestion 

with nitric acid (NS 4770). 

The wet sediment sample was dried at 40 °C for two days, homogenized and sieved through a 

500 µm nylon sieve. The fractions larger and smaller than 0.5 mm were weighed. 1 g of the 

fraction smaller than 0.5 mm was extracted with 20 mL 7 M nitric acid in a Pyrex 

decomposition bottle in an autoclave at 120 °C for 30 min. After cooling, 80 mL of distilled 

water was added to the Pyrex bottle. The clear solution was decanted into a polyethylene 

bottle until analysis. 

Ba, Cr, Cu, Pb and Zn were determined by inductively coupled plasma atomic emission 

spectrometry (ICP-AES). Cd was determined by atomic absorption, graphite furnace






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technique (GF-AAS). Hg was determined by atomic adsorption cold vapor technique (CV- 

AAS) based on NS 4768. 

2.3.2.3 Determination and quantification limits 

The limit of detection (LOD) and limit of quantification (LOQ) are given in Table 2-3 and 

Table 2-4. 

Table 2-3. Limit of detection (LOD) and limit of quantification (LOQ), hydrocarbons. 

Analytical parameter LOD LOQ Blank samples 

mg/kg mg/kg Number 

THC 1 2 11 

Sum NPD 0.01 0.03 - 

Sum PAH 0.005 0.02 - 

Table 2-4. Limit of detection (LOD) and limit of quantification (LOQ), metals. 

Ba Cd Cr Cu Hg Pb Zn 

ICP GFAAS ICP ICP CVAAS ICP ICP 

LOD mg/kg 0.5 0.03 0.3 0.1 0.01 0.5 1 

LOQ mg/kg 1.5 0.1 1 0.3 0.03 1.5 3 

2.3.3 Quality assurance 

All the analyses are accredited. Molab AS is accredited by Norsk Akkreditering to perform 

chemical analyses, accreditation number Test 032. The accreditation is according to NS-EN 

ISO/IEC 17025. Due to a minor fire at our inorganic laboratory, ALS was uses as a cooperator 

for the instrumental analyses. The corresponding accreditation number for ALS is 

Swedac Ackreditering 2030, and the analyses were performed by ALS Scandinavia AB Luleå. 

2.4 Deviation from Guidelines 

The survey is performed according to the guidelines.




3 RESULTS 

3.1 Sediment characterization 

3.1.1 Grain size distribution 



Date : 2010-11-30 Page 15 of 27 

MANAGING RISK 

The main results are shown in Table 3-1 Comparison of the grain size distribution in 2010 

with previous surveys is presented in Figure 3-1. Detailed results are given in Appendix 3. 

All samples from the stations consist mainly of sand (94-99 %). All sediments are classified 

as fine sand. There were no major differences compared to previous results. 

3.1.2 Total organic matter (TOM) 

The content of total organic matter is shown in Table 3-1. A comparison with results from 

previous surveys is given in Figure 3-1. 

The content of TOM is low, and range between 0.45 and 0.76 %. The content is similar, or 

lower than previous years. 

Table 3-1 Frigg 2010, grain size distribution and total organic matter (TOM) of dry sediment. 

FRI10R is reference station and not included in Figure 2-1. 

Station Direction Distance Depth TOM Classification Silt & clay Sand Gravel Median 

(°) (m) (m) (%) % % % (Φ) 

FRI1 350 200 106 0.63 Fine sand 1.3 96.5 2.2 2.49 

FRI2 758 196 105 0.47 Fine sand 1.0 99.0 0.0 2.54 

FRI3 188 300 102 0.55 Fine sand 0.9 98.7 0.4 2.43 

FRIX2 ** 249 1000 111 0.76 Fine sand 2.0 98.0 0.0 2.35 

FRI4 249 200 105 0.67 Fine sand 0.9 98.3 0.9 2.49 

FRIX1 ** 249 100 105 0.65 Fine sand 2.2 97.8 0.0 2.44 

FRI11 350 500 107 0.69 Fine sand 0.5 99.5 0.0 2.42 

FRI24 170 250 103 0.45 Fine sand 1.4 98.4 0.1 2.43 

FRI25 355 242 105 0.54 Fine sand 1.7 93.4 4.9 2.36 

FRI27 70 250 106 0.52 Fine sand 1.4 98.6 0.0 2.49 

FRI10R 135.4 14686 118 0.93 Fine sand 6.0 94.0 0.0 2.84 

Min.* 0.45 0.5 93.4 0.0 2.35 

Max.* 0.76 2.2 99.5 4.9 2.54 

*: The reference station is not included 

** : Additional stations in 2006 and 2010 because accidental spill of Hg in 2004.




TOM (%) 

1,4 

1,2 

1,0 

0,8 

0,6 

0,4 

0,2 

0,0 

FRI1 

1992 1997 2000 2003 2010 

FRI2 

FRI3 

FRIX2 

FRI4 

FRIX1 



Date : 2010-11-30 Page 16 of 27 

FRI11 

FRI24 

FRI25 

FRI27 

FRI10R 

silt & clay (%) 

7 

6 

5 

4 

3 

2 

1 

0 

FRI1 

FRI2 

MANAGING RISK 

1992 1997 2000 2003 2010 

Figure 3-1 Frigg 2010, sediment characterization (TOM and silt & clay) compared with previous 

surveys. 

3.2 Chemical analysis 

3.2.1 Hydrocarbons 

Summarized results of hydrocarbon analyses are given in Table 3-2. Comparison of the THC 

content in 2010 with previous surveys is presented in Figure 3-2. The distribution of THC in 

all layers (0-1, 1-3 and 3-6 cm) and the distribution related to the field centre are also shown 

in Figure 3-2. 

FRI3 

FRIX2 

FRI4 

FRIX1 

FRI11 

FRI24 

FRI25 

FRI27 

FRI10R






Date : 2010-11-30 Page 17 of 27 

MANAGING RISK 

Table 3-2 Frigg 2010, the content of hydrocarbons in sediments. All values in mg/kg dry sediment. 

The results from vertical sections of sediments are dark shaded. For comparison LSC-value from the 

north sub-region in Region II is included (north 97-06), Botnen 2006. Values above LSC are marked 

with bold text. 

Station Direction Distance THC PAH NPD 

(°) (m) average SD average SD average SD 

FRI1 350 200 8 2 

FRI2 758 196 4 4 

FRI3 188 300 10 3 0.142 0.067 0.08 0.02 

FRI3, 0-1 cm 188 300 8 0.074 0.06 

FRI3, 1-3 cm 188 300 15 4.24 1.80 

FRI3, 3-6 cm 188 300 11 0.182 0.09 

FRIX2 249 1000 6 2 

FRI4 249 200 6 0 

FRIX1 249 100 11 2 

FRI11 350 500 9 3 

FRI24 170 250 4 1 

FRI25 355 242 11 5 

FRI27 70 250 4 3 

FRI10R 135.4 14686 4 0 0.045 0.003 0.01 0.00 

FRI10R, 0-1 cm 135.4 14686 4 0.046 0.01 

FRI10R, 1-3 cm 135.4 14686 4 0.048 0.01 

FRI10R, 3-6 cm 135.4 14686 4 0.064 0.02 

Min.* 4 0.142 0.08 

Max.* 11 0.142 0.08 

LSC (north 97-06) 11 

*: The reference station is not included 

THC (mg/kg) 

18 

16 

14 

12 

10 

8 

6 

4 

2 

0 

FRI1 

1992 1997 2000 2003 2006 2010 LSC (north 97-06) 

FRI2 

FRI3 

FRIX2 

FRI4 

Figure 3-2 Frigg 2010, average content of THC compared with previous surveys (upper), THCcontent 

in the layers (FRI3 and FRI10R, lower left). The figure at lower right shows the distribution of 

THC in sediments at the sampling sites, the size of the circle indicate the amount of THC. The field 

centre is marked with an X. Cont. 

FRIX1 

FRI11 

FRI24 

FRI25 

FRI27 

FRI10R




FRI3 

FRI10R 

0 5 10 15 20 

Figure 3-2 cont. 

0-1 cm 1-3 cm 3-6 cm 

THC (mg/kg) 



Date : 2010-11-30 Page 18 of 27 

MANAGING RISK 

The content of THC is low (4-11 mg/kg). None of the measured THC-concentrations are 

above LSC-level. The THC-concentration in 2010 is similar or lower than previous surveys. 

At station FRI3, in layer 1-3 cm, the content of THC is 15 mg/kg, and PAH and NPD 

concentrations are 4.24 and 1.80, respectively. 

3.2.2 Metals 

Summarized results of metals analyses are given in Table 3-3. Comparison of the metals 

content in 2010 with previous surveys is presented in Figure 3-3. Metal analyses (except Hg) 

were not included in the 2006 survey. The distribution of Ba in all layers (0-1, 1-3 and 3-6 

cm) and the distribution related to the field centre are also shown in Figure 3-4. 

The content of Ba varies from 28 to 189 mg/kg. The Ba-concentrations are above LSC for 

FRI1, FRI24 and FRI25. Overall the concentrations of metals are quite similar with previous 

surveys, and several values are > LSC (north 97-06). The new station FRIX1, located 100m 

SW of the center, has the highest levels of all the metals except barium. In 2006 this was the 

only station with Hg concentration above LSC. Also in 2010 FRIX1 contains more Hg than 

the other stations (there is no LSC for 2010), and thus the overall picture is similar to 2006.






Date : 2010-11-30 Page 19 of 27 

MANAGING RISK 

Table 3-3 Frigg 2010, metals in sediments. All values in mg/kg dry sediment. The results from vertical 

sections of sediments are dark shaded. For comparison LSC-value from the north sub-region in 

Region II is included (north 97-06). Values above LSC are marked with bold text. 

Station Ba Cd Cr Cu Hg Pb Zn 

(°/m) avg SD avg SD avg SD avg SD avg SD avg SD avg SD 

FRI1 350/200 81 22 0.04 0.01 10.9 1.7 17.8 1.5 0.01 0.002 45.0 5.7 192 23 

FRI2 758/196 31 2




Cd (mg/kg) 

Cu (mg/kg) 

Zn (mg/kg) 

0,07 

0,06 

0,05 

0,04 

0,03 

0,02 

0,01 

0,00 

30 

25 

20 

15 

10 

5 

0 

350 

300 

250 

200 

150 

100 

50 

0 

FRI1 

FRI1 

FRI1 

1992 1997 2000 2003 2010 LSC (north 97-06) 

FRI2 

FRI3 

FRIX 

2 

FRI4 

FRIX 

1 



Date : 2010-11-30 Page 20 of 27 

FRI11 

FRI24 

FRI25 

FRI27 

FRI10 

R 

1992 1997 2000 2003 2010 LSC (north 97-06) 

FRI2 

FRI2 

FRI3 

FRI3 

Figure 3-3 Cont. 

FRIX 

2 

FRI4 

FRIX 

1 

FRI11 

FRI24 

FRI25 

FRI27 

FRI10 

R 

1992 1997 2000 2003 2010 LSC (north 97-06) 

FRIX 

2 

FRI4 

FRIX 

1 

FRI11 

FRI24 

FRI25 

FRI27 

FRI10 

R 

Cr (mg/kg) 

Pb (mg/kg) 

14 

12 

10 

8 

6 

4 

2 

0 

60 

50 

40 

30 

20 

10 

0 

FRI1 

FRI1 

FRI2 

FRI3 

MANAGING RISK 

2000 2003 2010 LSC (north 97-06) 

FRI2 

FRI3 

FRIX 

2 

FRIX 

2 

FRI4 

FRI4 

FRIX 

1 

FRIX 

1 

FRI11 

FRI11 

FRI24 

FRI24 

FRI25 

FRI25 

FRI27 

FRI27 

FRI10 

R 

1992 1997 2000 2003 2010 LSC (north 97-06) 

FRI10 

R




FRI10R 

0-1 cm 1-3 cm 3-6 cm 

0 10 20 30 40 50 60 70 

Ba (mg/kg) 



Date : 2010-11-30 Page 21 of 27 

MANAGING RISK 

Figure 3-4 Frigg 2010, Ba-content in the layers (FRI10R, left). The figure at right shows the 

distribution of Ba in sediments at the sampling sites, the size of the circle indicate the amount of Ba. 

The field centre is marked with an X. Sites with Ba > LSC are marked with filled circles. 

The Frigg survey 2010 has not been a part of a regional survey, hence there is no LSC2010 

value, and the size of contaminated area has not been estimated. There are, however, no major 

changes compared to the previous survey in 2006, and the size of the contaminated area 

should be considered to be in the same order of magnitude as in 2006. 

3.3 Biological analysis 

Abundance 

A total of 201 taxa and 11454 individuals were sampled at 11 stations. Greatest abundance 

(59.5 %) was found among the polychaetes, of which the species Myriochele oculata 

constitutes 40.4 % and Owenia fusiformis constitutes 18.6 %, see Table 3-4. 

The abundance of juvenile echinoids (and partly ophiuroids) was also high (992 individuals). 

The echinoids were present in the top-10 list from each station, and juveniles are thus 

removed from the data set prior to calculation of indices and statistics.






Date : 2010-11-30 Page 22 of 27 

MANAGING RISK 

Table 3-4 Number of species and individuals distributed between the main groups, Frigg 2010. 

Main animal groups 

Individuals Species 

Number % Number % 

All Ex.juv. All Ex.juv. All Ex.juv. All Ex.juv. 

Varia 733 733 6.4 7.2 17 17 8.5 8,7 

Polychaeta 6822 6714 59.5 65.9 74 71 36.8 36,4 

Myriochele oculata 2756 40.4 

Owenia fusiformis 1269 18,6 

Crustacea 1070 1070 9.3 10,5 49 49 24.4 25,1 

Mollusca 762 762 6.6 7.5 45 45 22.4 23.1 

Echinodermata 2067 907 18.0 8.9 16 13 8.0 6.7 

Total 11454 10186 100.0 100.0 201 195 100.0 100.0 

Diversity and dominant species 

The dominant species varied from 14.4 % at FRI1 (350°/200m) to 45.2 % at FRI11 

(350°/500m). The 10 most abundant species made up from 57.2 % at FRI4 (249°/200m) to 

82.8 % at FRI2 (758/196m), see Table 3-5. The bristle worm Myriochele oculata occurs in 

very high numbers. Other dominant species are the bristle worms Owenia fusiformis and 

Spiophanes bombyx. 

Table 3-5 10 most dominant species, Frigg 2010. 

10 most common species 

FRI 1 (350/200m) Number % Cum % FRI 2 (758/196m) Number % Cum % 

Spiophanes bombyx 123 14,44 14,44 Myriochele oculata 507 44,16 44,16 

Myriochele oculata 122 14,32 28,76 Owenia fusiformis 190 16,55 60,71 

Owenia fusiformis 92 10,80 39,55 Amphiura filiformis 47 4,09 64,81 

Cerianthus lloydi 45 5,28 44,84 Unciola planipes 31 2,70 67,51 

Amphipholis squamata 45 5,28 50,12 Parvicardium minimum 29 2,53 70,03 

Parvicardium minimum 45 5,28 55,40 Goniada maculata 25 2,18 72,21 

Siphonoecetes kroeyeranus 38 4,46 59,86 Cerianthus lloydi 23 2,00 74,22 

Prionospio cirrifera 23 2,70 62,56 Scoloplos (Scoloplos) armiger 23 2,00 76,22 

Nemertina indet. 18 2,11 64,67 Spiophanes bombyx 22 1,92 78,14 

Edwardsia sp. 16 1,88 66,55 Edwardsia sp. 20 1,74 79,88 

Spiophanes wigleyi 16 1,88 68,43 Paramphinome jeffreysii 17 1,48 81,36 

Ophiocten affinis 16 1,88 70,31 Aonides paucibranchiata 17 1,48 82,84 



Cerianthus lloydi 29 5,68 28,18 Spiophanes bombyx 74 8,97 23,52 


Parvicardium minimum 24 4,70 37,77 Edwardsia sp. 35 4,24 33,45 

Owenia fusiformis 23 4,50 42,27 Parvicardium minimum 34 4,12 37,58 

Chaetozone setosa complex 20 3,91 46,18 Amphiura filiformis 33 4,00 41,58 

Goniada maculata 16 3,13 49,32 Siphonoecetes kroeyeranus 32 3,88 45,45 

Amphiura filiformis 14 2,74 52,05 Spiophanes wigleyi 27 3,27 48,73 

Spiophanes wigleyi 13 2,54 54,60 Chaetozone setosa complex 26 3,15 51,88 

Hippomedon denticulatus 13 2,54 57,14 Ophiocten affinis 22 2,67 54,55 

Myriochele oculata 12 2,35 59,49 Prionospio cirrifera 22 2,67 57,21




Table 3-5 cont. 



Date : 2010-11-30 Page 23 of 27 

MANAGING RISK 

FRI 10R (135/14686) Number % Cum % FRI 11 (350/500m) Number % Cum % 

Owenia fusiformis 389 34,12 34,12 Myriochele oculata 533 45,21 45,21 


Amphiura filiformis 54 4,74 57,98 Amphiura filiformis 55 4,66 62,68 

Phoronis muelleri 36 3,16 61,14 Parvicardium minimum 40 3,39 66,07 

Thyasira flexuosa 29 2,54 63,68 Spiophanes bombyx 32 2,71 68,79 

Caudofoveata spp. 22 1,93 65,61 Scoloplos (Scoloplos) armiger 26 2,21 70,99 

Urothoe elegans 21 1,84 67,46 Paramphinome jeffreysii 24 2,04 73,03 

Goniada maculata 19 1,67 69,12 Unciola planipes 20 1,70 74,72 

Harpinia antennaria 18 1,58 70,70 Aonides paucibranchiata 20 1,70 76,42 

Ophiocten affinis 17 1,49 72,19 Edwardsia sp. 15 1,27 77,69 

Aonides paucibranchiata 16 1,40 73,60 Nemertina indet. 14 1,19 78,88 

Fri 24 (170/250m) Number % Cum % Fri 25 (355/242m) Number % Cum % 

Myriochele oculata 380 35,12 35,12 Myriochele oculata 151 16,50 16,50 

Owenia fusiformis 101 9,33 44,45 Owenia fusiformis 83 9,07 25,57 

Unciola planipes 70 6,47 50,92 Unciola planipes 66 7,21 32,79 

Amphiura filiformis 53 4,90 55,82 Spiophanes bombyx 64 6,99 39,78 

Aonides paucibranchiata 46 4,25 60,07 Amphiura filiformis 63 6,89 46,67 


Scoloplos (Scoloplos) armiger 25 2,31 66,17 Ophiocten affinis 30 3,28 55,63 

Spiophanes bombyx 25 2,31 68,48 Paramphinome jeffreysii 27 2,95 58,58 

Cerianthus lloydi 22 2,03 70,52 Scoloplos (Scoloplos) armiger 27 2,95 61,53 

Parvicardium minimum 20 1,85 72,37 Aricidea catherinae 27 2,95 64,48 

Aricidea catherinae 20 1,85 74,21 Nemertina indet. 19 2,08 66,56 

Fri 27 (70/250m) Number % Cum % Fri X1 (249/100m) Number % Cum % 

Myriochele oculata 392 39,40 39,40 Spiophanes bombyx 108 14,71 14,71 

Owenia fusiformis 82 8,24 47,64 Cerianthus lloydi 53 7,22 21,93 


Aonides paucibranchiata 45 4,52 59,20 Parvicardium minimum 48 6,54 35,01 

Antalis entalis 43 4,32 63,52 Spiophanes wigleyi 45 6,13 41,14 


Unciola planipes 25 2,51 68,94 Cirriformia tentaculata 34 4,63 50,41 

Aricidea catherinae 24 2,41 71,36 Hippomedon denticulatus 30 4,09 54,50 

Echinocyamus pusillus 19 1,91 73,27 Chaetozone setosa complex 28 3,81 58,31 

Parvicardium minimum 15 1,51 74,77 Owenia fusiformis 26 3,54 61,85 


Fri X2 (249/1000m) Number % Cum % 

Myriochele oculata 310 38,70 38,70 

Owenia fusiformis 111 13,86 52,56 

Amphiura filiformis 49 6,12 58,68 

Aricidea catherinae 30 3,75 62,42 

Paramphinome jeffreysii 24 3,00 65,42 

Ophiocten affinis 19 2,37 67,79 

Scaphopoda spp. 16 2,00 69,79 

Parvicardium minimum 15 1,87 71,66 

Aonides paucibranchiata 14 1,75 73,41 

Goniada maculate 13 1,62 75,03






Date : 2010-11-30 Page 24 of 27 

MANAGING RISK 

The Shannon Wiener diversity index (Table 3-6) varied from 3.5 at the FRI2 (758°/196m) to 

5.3 at FRI11 (350/500m) and the Hurlberts index (ES100) varied from 25 to 39, exclusive 

juveniles. 

Indices above 4 indicate a relatively undisturbed fauna. Indices between 3 and 4 indicate a 

slight disturbance, while indices between 2 and 3 indicate a disturbance in the fauna. In 

general ES100 indices above 20 characterize a relatively normal fauna community. The fauna 

at FRI2 seems to differ somewhat from the other stations with slightly lower indices. 

Table 3-6 Numbers of individuals (N) and species (S), depth, Shannon-Wiener diversity index (H’), 

Pielou’s evenness index (J), and expected number of species per 100 individuals (ES100) for each 

station at Frigg 2010 (ex. juv.). 

Station º / m Depth (m) S N H' J ES100 

FRI 1 350/200 106 79 852 4.8 0.75 33 

FRI 2 758/196 105 77 1148 3.5 0.56 25 

FRI 3 188/300 102 78 511 5.0 0.80 39 

FRI 4 249/200 111 100 825 5.3 0.79 39 

FRI 10R 135/ 14686 105 95 1140 4.1 0.63 31 

FRI 11 350/500 105 80 1179 3.7 0.58 27 

FRI 24 170/250 107 80 1082 4.2 0.66 30 

FRI 25 355/242 103 87 915 4.9 0.76 34 

FRI 27 70/250 105 86 995 4.0 0.63 29 

FRI X1 249/100 106 71 734 4.9 0.79 32 

FRI X2 249/1000 118 88 801 4.0 0.62 30 

Classification and ordination 

The dendrogram from the cluster analysis and the 

MDS plot from the ordination analysis based on 

station level are presented in Figure 3-5. The 

reference station (254°/15000m) separates from 

the Frigg stations which forms two separate 

groups. The cluster analysis is well supported by 

the ordination analysis. 

The similarity analysis reveals that the 

differences are caused mainly by significantly 

higher number of M. oculata and Owenia 

fusiformis in group 2 whilst group 1 has higher 

abundance of Spiophanes bombyx. 

The stations are similar, but not exactly the same 

as in the previous faunal survey in 2003. The 

results from 2003 indicated that FRI1 and FRI3 

were disturbed. The group pattern in 2010 is not 

very different from the 2003 groups. The 2010 

The polychaete Myriochele oculata (= Galathowenia 

oculata) have been the most abundant benthic organism in 

the Ekofisk region (Region I) through recent regional 

surveys (DNV 2003, DNV 2006, Akvaplan-niva 2009). It 

is a small, thin worm, usually less than 1 mm wide but up 

to several inches long. It lives in a firm but flexible tube 

made of fine-grained sand cemented with mucus, and this 

tube can be several times as long as the worm inside the 

tube. The tubes are vertically buried in the sediment, with 

at least 1 cm of the top end above the sediment. At high 

densities M. oculata may give the sediment a "hairy" 

appearance. The worm is most abundant in sediments 

consisting of fine sand. The vertical distribution varies 

from very shallow water down to several hundred meters. 

M. oculata feeds on the sediment (probably by bending 

the tube so that the mouth can reach deposited particles), 

but can also switch to a passive suspension feeding by 

placing the head in the flow (Fauchald & Jumars 1979). 

This flexibility in food selection strategy means that it can 

effectively utilize particulate organic carbon in the 

sediment-water interface (Taghon & Greene 1992; 

Thomsen et al. 1995). It is probably this flexibility in food 

selection strategy that allows it to flourish in huge 

amounts when the environmental and biological 

conditions are favourable.






Date : 2010-11-30 Page 25 of 27 

MANAGING RISK 

data are, however, disturbed by the high abundances of the bristle worm Myriochele oculata 

(see text box). Thus the same analysis, but omitting M. oculata from the data, was performed. 

The results are shown in Figure 3-6, and do not change the picture. The differences between 

group 1 and 2 are caused mainly by higher numbers of S. bombyx in group 1 and more O. 

fusiformis in group 2. This result is very similar to the picture in 2003. 

Similarity 

50 

60 

70 

80 

90 

100 

Fri X1 

Fri 03 

G roup 1 

Fri 10R 

Fri 01 

Fri 01 

Fri 03 

Fri 04 

Fri 04 

Fri X1 

Fri x2 

Fri 25 

Fri 11 

Fri 02 Fri 24 

Fri 02 

Transf orm: Square root 

Resemblance: S17 Bray Curtis similarity 

Fri 27 

Fri 11 

Group 1 Group 2 

Fri 10R 

Fri x2 

G roup 2 

Fri 27 

2D Stress: 0,04 

Trans f orm : Square root 

Res em blanc e: S17 Bray Curtis s imilarity 

Fri 24 

Fri 25 

Station 

Figure 3-5 Dendrogram and MDS plot of Frigg stations 2010 (ex. juv.). 

Direction/ 

distance 

Depth (m) 

FRI1 350/200 106 

FRI2 758/196 105 

FRI3 188/300 102 

FRIX2 249/1000 111 

FRI4 249/200 105 

FRIX1 249/100 105 

FRI11 350/500 107 

FRI24 170/250 103 

FRI25 355/242 105 

FRI27 70/250 106 

FRI10R 135.4/ 14686 118



Similarity 


40 

60 

80 

100 

Fri 10R 

Fri 01 

Fri 03 

Fri 04 

Fri X1 

Fri x2 



Date : 2010-11-30 Page 26 of 27 

Fri 27 

Transform: Square root 

Resemblance: S17 Bray Curtis similarity 

Fri 24 

Fri 25 

Fri 02 

Fri 11 

MANAGING RISK 

Figure 3-6 Dendrogram and MDS plot of Frigg stations 2010 (ex. juv. and ex. M. oculata). 

The sediment characteristics are uniform across all stations except the reference station data, 

but data from the chemical analyses suggests that the metal concentrations except barium are 

higher at stations FRI1, -3, -4 and –X1 (group 1). Using the BioEnv analysis shows that Cu is 

the single environmental parameter that correlates the most with the fauna distribution 

(coefficient=0.71), number two is Pb (0.61). If FRI10R is omitted from the analysis, the 

correlation coefficient for Cu increases to 0.79. The over all best combination (coefficient 

0.91) to explain the faunal variations at Frigg is the environmental parameters depth and Cu. 

In 2003 the combination of Cr, TOM and silt/clay gave the best correlation. Thus it seems like 

the levels of metals, especially Cu, Pb and Cr, may contribute to the faunal variations at Frigg. 

The concentrations are highest at FRIX1, FRI1, FR3 and FRI4. 

3.4 Conclusions 

All stations consists mainly of sand (94-99 %) and the content of total organic matter is low 

(0.45-0.76 %). The concentrations of THC are low (4-11 mg/kg), and none of the measured 

THC-concentrations are above LSC-level. The concentrations of Ba are in the range from 28 

to 189 mg/kg. Three stations have Ba-concentrations above LSC-level. Several of the stations 

have metal concentration >LSC (north97-06), and these elevated levels are most pronounced 

at stations FRX1, -1, -3 and -4 where the fauna is slightly different from the other field 

stations. Compared with previous surveys it is some minor differences, but it is not found any 

trend, and overall there were no major differences compared to previous surveys.




4 REFERENCES 



Date : 2010-11-30 Page 27 of 27 

MANAGING RISK 

Akvaplan-niva 2009. Offshore sediment survey of Region I 2008. Akvplan.niva AS Rapport: 

4315-02. 

Bray, J.R., & Curtis, J.T. (1957), An ordination of the upland forest communities of southern 

Wisconsin. Ecol. Monogr. 27: 325-349. 

Buchanan, J.B. (1984), Sediment analysis. In "Methods for the study of marine benthos". 

Editors: Holme, N.A., and A.D. McIntyre. Blackwell Scientific Publications, Oxford, UK, pp. 

41-65. 

DNV 2003. Environmental Monitoring Region I – Ekofisk 2002. DNV report-2006-0187. 

DNV 2006. Environmental Monitoring Region I – Ekofisk 2005. DNV report-2003-0338. 

DNV 2010. Miljøovervåking Region III 2010 og grunnlagsundersøkelser i omkringliggende 

regioner. DNV-rapport 2010-0908. 

Fauchald, K., Jumars, P. A. 1979. The diet of worms: a study of polychaete feeding guilds. 

Oceanogr. Mar. Biol. Annu. Rev. 17:193-284.Holland, G.J., Greenstreet, S.P.R., Gibb, I.M. 

2005. 

Lance, G. N., & Williams, W.T. (1967). A general theory of classificatory sorting strategies. 

II. Clustering systems. -Computer Jour. 10: 271-277. 

Pielou, E.C. (1969). An introduction to mathematical ecology. Wiley-Interscience, New York. 

Shannon, C.E., & Weaver, W.W. (1963). The mathematical theory of communities. 

University of Illinois Press. Urbana, Illinois. 117 s. 

Taghon, G. & Greene, R. R. 1992. Utilization of deposited and suspended particulate matter 

by benthic interface feeders. Limnology and Oceanography. 37: 1370-1391. 

Thomsen, L., Graf, G., Juterzenka, K., Witte, U., 1995. An in situ experiment to investigate 

the depletion of seston above an interface feeder field on the continental margin of the 

western Barents Sea. Mar. Ecol. Prog. Ser., 123: 295-300. 

Unifob 2004. Environmental Monitoring Survey of Region II, 2003. TL 2003/011. 

Unifob 2007. Miljøovervåking av olje- og gassfelt i Region II i 2006.






Date : 2010-11-30 

APPENDIX 

1 

EXTRACT FROM SURVEY REPORT 

MANAGING RISK


Toktrapport 

Miljøovervåking Region III 2010 og 

grunnlagsundersøkelser i omkringliggende 

regioner 

Rapportnr./DNV Referansenr.: DNV 2010-0908 / 12O31ER-3 

Rev. 00, 2010-05-14


Rapport for Statoil Petroleum AS 

Miljøovervåking Region III 2010 og grunnlagsundersøkelser i 

omkringliggende regioner 

Miljøovervåking Region III 2010 og 

grunnlagsundersøkelser i omkringliggende regioner 

Oppdragsgiver: 

Statoil Petroleum AS 

Postboks 7200 

5020 BERGEN 

Norway 

Oppdragsgivers referanse: 

Endre Aas 

Dato for første 

utgivelse: 

2010-05-14 Prosjektnr.: EP022920 

DNV Referansenr.: 12O31ER-3 

Revisjon nr.: 00 

Dato: 2010-06-28 Side i av iii 

MANAGING RISK 

DET NORSKE VERITAS AS 

P.O.Box 300 

1322 Høvik, Norway 

Tlf: +47 67 57 99 00 

Faks: +47 67 57 99 11 

http://www.dnv.com 

Org. nr.: 

Rapportnr.: DNV-rapp. 2010-0908 Organisasjonsenhet: Environmental Risk Management 

Revisjon nr.: 00 Emnegruppe: Marin Overvåking 

Sammendrag: 

Rapporten presenterer gjennomføringen av feltarbeid i Region III 2010, grunnlagsundersøkelser på Yme Beta 

og Gamma, Bream, Pi Nord og Sør, Pan Pandora og Jordbær Sentral og Vest samt etterkantundersøkelse på 

Frigg. 

Utarbeidet av: 

Verifisert av: 

Godkjent av: 

Navn og tittel 

Sam Arne Nøland 

Principal Consultant 


Amund Ulfsnes 

Senior Consultant 


Tor Jensen 

Customer Service Manager 

Signatur 

Signatur 

Signatur 

Ingen distribusjon uten tillatelse fra oppdragsgiver eller ansvarlig 

organisasjonsenhet, men fri distribusjon innen DNV etter 3 år 

Ingen distribusjon uten tillatelse fra oppdragsgiver eller ansvarlig 

organisasjonsenhet 

Strengt konfidensiell 

Fri distribusjon 

Indekseringstermer 

Nøkkelord 

Serviceområde 

Markedssegment 

Sedimenter, bunnfauna, prøvetaking, 

vann 

SHE Management 

Oil and Gas 

Revisjon nr. / Dato: Årsak for utgivelse: Utarbeidet av: Godkjent av: Verifisert av:





Innholdsfortegnelse 



Dato: 2010-06-28 Side ii av iii 

MANAGING RISK 

1 INNLEDNING ................................................................................................................... 1 

2 FARTØY OG FELTUTSTYR.......................................................................................... 3 

3 TOKTPERSONELL.......................................................................................................... 6 

4 GJENNOMFØRING AV TOKTET ................................................................................ 6 

5 FELT FOR FELT .............................................................................................................. 7 

5.1 Yme Beta og Gamma ................................................................................................. 7 

5.2 Bream ......................................................................................................................... 8 

5.3 Pi Sør og Nord............................................................................................................ 9 

5.4 Frigg ......................................................................................................................... 11 

5.5 Oseberg J .................................................................................................................. 11 

5.6 Oseberg Sør .............................................................................................................. 12 

5.7 Tune Sør ................................................................................................................... 14 

5.8 Oseberg Delta........................................................................................................... 15 

5.9 Oseberg Feltsenter.................................................................................................... 16 

5.10 Brage ........................................................................................................................ 17 

5.11 Troll A...................................................................................................................... 18 

5.12 Troll B og C.............................................................................................................. 18 

5.13 Fram Øst................................................................................................................... 20 

5.14 Fram Vest ................................................................................................................. 21 

5.15 Pan Pandora.............................................................................................................. 21 

5.16 Jordbær Sentral og Vest ........................................................................................... 22 

5.17 Huldra....................................................................................................................... 24 

5.18 Veslefrikk ................................................................................................................. 24 

5.19 Oseberg Øst .............................................................................................................. 26 

5.20 Oseberg C................................................................................................................. 27 

5.21 Oseberg G................................................................................................................. 28 

6 ERFARINGER FRA TOKTET ..................................................................................... 29 

Vedlegg 1 Detaljer fra prøvetakingen





Vedlegg 2 Informasjon om fartøyet 

Vedlegg 3 Surveyrapport, Fugro 



Dato: 2010-06-28 Side iii av iii 

MANAGING RISK





1 INNLEDNING 



Dato: 2010-06-28 Side 1 av 29 

MANAGING RISK 

På vegne av Statoil har DNV og Molab gjennomført innsamling av sedimenter og vannprøver i 

Region III i forbindelse med regional miljøundersøkelse. Innsamlingen inkluderte også enkelte 

grunnlagsundersøkelse utenfor region III samt etterkantundersøkelse på Frigg. Rapporten 

presenterer feltarbeidet basert på et program forelagt SFT/ekspertgruppen før arbeidet startet. 

Feltarbeidet er gjennomført iht. Aktivitetsforskriften og DNVs akkrediterte metoder for denne 

type arbeid (Test 083). Undersøkelsen omfatter innsamling av sedimenter for kjemiske og 

biologiske analyser, samt karakterisering av sedimentene. I tillegg ble det samlet inn vannprøver 

for analyser av enkelte radioaktive elementer. På vegne av Uni Research ble det også tatt 

sedimentprøver for DNA-analyser. 

Innsamlingen foregikk med fartøyet fiskefartøyet Libas”. Toktet som helhet foregikk i perioden 

18. mai til 2. juni. 

Tabell 1-1 og Figur 1-1b) gir en oversikt over undersøkelsesprogrammet for Region III. Andre 

felt inkludert i undersøkelsen er listet opp i Tabell 1-2 og vist i Figur 1-1 a). 

Tabell 1-1 Oversikt over felt som inngår i overvåkingen i Region III 2010. Statoil er operatør på alle 

feltene i regionen. 

Planlagt Faktisk antall 

antall 

stasjoner 

Region/ underregion Felt Type 

stasjoner 

Region III/Oseberg Oseberg Feltsenter Overvåking 8 8 

Oseberg C Overvåking 10 10 

Oseberg Øst Overvåking 12 12 

Oseberg Sør Overvåking 17 17 

Oseberg G Overvåking 8 8 

Oseberg J Overvåking 8 8 

Oseberg Delta Overvåking 5 5 

Brage Overvåking 8 8 

Tune Sør* Overvåking 5 5 

Veslefrikk Overvåking 13 16 

Huldra Overvåking 5 5 

Region III/Troll Troll B +C Overvåking 17 17 

Fram Vest Overvåking 12 12 

Fram Øst* Overvåking 20 19 

Troll A Overvåking 8 8 

Regionale Overvåking 12 12 

Sum 

*= første gangs oppfølging 

168 170







Dato: 2010-06-28 Side 2 av 29 

MANAGING RISK 

Tabell 1-2 Felt utenfor Region III som er inkludert i undersøkelsen. 

Region/ underregion Selskap Felt Type Antall stasjoner 

Region I Talisman Yme Beta Grunnlag 14* 

Yme Gamma Grunnlag 13 

BG Pi Sør Grunnlag 13 

Region II BG Bream Grunnlag 14* 

BG Pi Nord Grunnlag 14* 

Total Frigg Etterkant 11 

Region IV Statoil Pan Pandora Grunnlag 14* 

BG Jordbær Sentral Grunnlag 

13 

Jordbær Vest Grunnlag 

14* 

Totalt antall stasjoner 120 

*: Inklusive regional stasjon 

6770000 

6760000 

6750000 

6740000 

6730000 

6720000 

6710000 

6700000 

b) 

a) 

Figur 1-1 a) Hele undersøkelsesområdet, b), Region III. Regionale stasjoner er merket som røde sirkler. 

REG3-7 

Huldra 

REG3-16 

REG3-15 

REG3-13 

Veslefrikk 

REG3-14 

Oseberg C 

Oseberg G 

REG3-17 Tune 

Oseberg 

sør 

Delta 

REG3-19 

Oseberg Øst 

Brage 

REG3-18 

Oseberg Feltsenter 

Oseberg Sør 

Oseberg J 

REG3-11 

Fram Vest 

Fram Øst 

REG3-12 

TROLL B 

TROLL C 

REG3-8-04 

TROLL A 

REG3-6 

470000 480000 490000 500000 510000 520000 530000 540000





2 FARTØY OG FELTUTSTYR 



Dato: 2010-06-28 Side 3 av 29 

MANAGING RISK 

Undersøkelsen ble gjennomført fra fiskefartøyet Libas. Detaljer om fartøyet finnes i Appendiks 

B. 

I henhold til Aktivitetsforskriften skal prøvetakingen skje innenfor en radius av 50m rundt en 

stasjon. I de tilfellene det var nødvendig å gå utenfor denne avstanden ble stasjonen regnet som 

en ny stasjon (dette er anmerket i de tilfellene dette var nødvendig). 

Region III domineres av to typer bunnsedimenter. Den relativt grunne vestre delen av regionen 

(underregion Oseberg) består av fin til grov sand og krever en relativt tung grabb, mens de dypere 

deler av regionen (Fram/Trollområdet) består av myk leire, og det er vanskelig å få prøver av 

uforstyrret sedimentoverflate fordi grabben synker for dypt ned i sedimentet. Det ble tatt med 6 

van Veen grabber med ulik vekt og utforming. 

Appendiks A inneholder opplysninger om evt. forflytninger der dette var hensiktsmessig. 

Prøvetakingen som ble utført er standard for denne type undersøkelser og følgende utstyr ble 

benyttet: 

o Langarmet van Veen grabb, offshore type (Delprodukter merket B15) 

o Ekstra langarmet van Veen grabb, offshore type (Delprodukter merket B1) 

o Langarmet van Veen grabb, lett offshore type (Delprodukter merket B22) 

o Kortarmet van Veen grabb (B17) 

o 2 x Kombigrabb – modifisert van Veen (0, 15m 2 overflateareal, tar kjemi- og 

biologiprøver i samme hugg) (merket B23) 

o Mottaksbord i rustfritt stål 

o Målesylinder 

o Vaskebord 

o Sikter (5 mm og 1,0 mm runde hull) 

o Vinsj/aggregat pakke (KC) 

o Niskin vannhenter (5 liter) 

De biologiske prøvene ble tilsatt formalinløsning (bufret med hexamin) med fargestoff 

(bengalrosa). Prøvene ble oppbevart på plastspann, og lagret i finérkasser. Sedimentprøver til 

kjemiske analyser ble oppbevart i rilsanposer eller i plastbegere. Seks dypfrysere ble benyttet for 

lagring av kjemiske prøver. Prøve for DNA-analyse ble tatt fra de øvre 5cm av sedimentet og 

konservert med 96% EtOH. Vannprøver for radioaktivitet (10 liter/prøve) ble konservert med 

salpetersyre. 

Det var også planlagt å prøve ut enkelte substitutter for formalin som fikseringsmiddel. Det lyktes 

imidlertid ikke å skaffe de aktuelle substitusjonsstoffene tidsnok til toktet.







Dato: 2010-06-28 Side 4 av 29 

MANAGING RISK 

Det ble også tatt med en kommunikasjonsenhet for trådløs forbindelse mellom grabb og båtdekk. 

Hensikten var å prøve ut om signalene fra enheten ble mottatt på fartøyet på de aktuelle 

vanndypene. Avhengig av resultatet vil enheten senere kunne benyttes til å gi informasjon til 

dekke om grabben har løst ut eller ikke. 

I tillegg til innleid navigasjonssystem fra Fugro (se Appendiks C) var det montert opp et separat 

navigasjonssystem (GPS fra Garmin og kartplotterprogram fra Nobeltec). Systemet gjør det greit 

å sjekke ut hvor fartøyet til enhver tid befinner seg, samt at alle posisjoner blir lagret hvert 10 

min. I Figur 2-1 er det vist et eksempel på et skjermbilde som viser seilingsruten og fartøyets 

plassering på en stasjon. Den ytterste sirkelen har en radius på 50m som avgrenser området hvor 

prøvene skal tas. 

Figur 2-1. Eksempel på skjermbilde som viser seilingsrute og fartøyets plassering på en stasjon. 

Ytterste sirkel har radius på 50 m som avgrenser området hvor prøvene skal tas. 

Alle felt i region III har vært undersøkt tidligere, senest i 2007. I noen få tilfeller var det 

nødvendig å justere plasseringen av stasjoner på enkelte felt på grunn av konflikt med 

undervannsinstallasjoner, rørledninger eller ankerkjettinger. I Appendiks A – Detaljer fra 

prøvetakingen er faktiske posisjoner som ble prøvetatt oppgitt. 

• I tilfeller der stasjoner er flyttet utenfor 50m-sonen er stasjonsnavnet endret (fått endelsen - 

10) og ny retning/avstand og posisjon er oppgitt. 

• Der stasjoner er flyttet, men fremdeles ligger innenfor 50m-sonen, er den nye posisjonen 

oppgitt som faktisk mens retning/avstand er som før. 

Tabell 2-1 gir en oversikt over antall planlagte stasjoner og analyser for hvert felt. I tillegg ble tatt 

ut en sedimentprøve (0-5 cm) fra hver stasjon for DNA-analyser på de felt der Statoil er operatør.







Dato: 2010-06-28 Side 5 av 29 

MANAGING RISK 

Tabell 2-1. Totalt antall planlagte stasjoner og analyser inkludert i prøvetakingsprogrammet i Region III 

2010. De regionale stasjonene i region III er oppgitt separat, mens regionale stasjoner som er tatt i 

forbindelse med enkelte av grunnlagsundersøkelsene er inkludert i disse. 

Felt Stasjoner Bio Korn/ 

TOM 

REGION III 

THC Metaller NPD/ 

PAH 

Radioakt. 

Radioakt. 

i vann 

Regionale 12 60 12 36 36 36 6 2 

Oseberg feltsenter 8 25 5 24 24 6 

Oseberg C 10 50 10 30 30 6 

Oseberg Øst 12 30 6 36 36 6 

Oseberg Sør 17 40 8 51 39 18 

Oseberg G 8 30 6 24 24 9 

Oseberg J 8 35 7 24 24 12 

Oseberg D 5 20 4 15 15 6 

Brage 8 30 6 24 24 15 24 6 

Veslefrikk 13 35 7 39 39 15 

Huldra 5 20 4 15 15 15 

Troll A 8 0 0 24 24 6 

Troll B og C 17 15 3 51 51 9 24 24 

Fram Vest 12 20 4 36 36 6 

Fram Øst 20 80 16 60 60 12 

Tune Sør 5 25 5 19 19 19 

Sum Region III 168 515 103 516 504 204 54 32 

Grunnlagsundersøkelser 

Pan Pandora 14 70 14 46 46 46 

Yme Gamma 13 65 13 43 43 43 

Yme Beta 14 70 14 46 46 46 

Pi 27 135 27 89 89 89 

Bream 14 70 14 46 46 46 

Etterkantundersøkelse 

Frigg 11 55 11 37 33 10 

Totalt 2010 261 980 196 823 807 484 54 32





3 TOKTPERSONELL 

Toktet ble gjennomført med 6-timers skiftordning med følgende personell: 

Sam-Arne Nøland (DNV), toktleder 

Thomas Møskeland (DNV), skiftleder 

Øyvind Fjukmoen (DNV, skiftleder) 

Christian Volan (DNV) 

Marte Braathen (DNV) 

Gunn Mari Michaelsen (MOLAB) 

Odd Strandvoll (MOLAB) 



Dato: 2010-06-28 Side 6 av 29 

MANAGING RISK 

Rannveig Elise Otterlei (første uken) og Endre Aas (resten av toktet) var Statoils representanter 

under toktet. 

4 GJENNOMFØRING AV TOKTET 

Været var meget bra og stabilt i hele perioden. Tabell 4-1 viser en kronologisk oversikt over 

prøvetakingen. 

Tabell 4-1 Detaljoversikt, forbruk av tid på de enkelte felt. 

Felt Start Slutt Totalt tid 

Snitt 

prøvetak. 

Snitt 

gangtid 

Tilrigging 18.05, 09:15 Avreise ca. kl.16.30. 7 

Yme Beta og Gamma (inkl. Reg1-10) 19.05, 06:15 20,05, 11:10 28:55 0:45 0:19 

Bream (inkl. Reg2-11) 20.05, 14:45 21.05, 07:25 16:40 1.03 0:07 

Pi Nord og Sør (inkl. Reg2-6) 21.05, 13:30 22.05, 12:40 23:10 0:42 0:09 

Frigg 22.05, 21:00 23.05, 05:40 8:40 0:34 0:12 

Oseberg J 23.05, 08:40 15:05 6:25 0:40 0:08 

Oseberg Sør 23.05, 15:40 24.05, 02:30 10:50 0:27 0:10 

Tune Sør 24.05, 05:55 10:20 4:25 0:42 0:10 

Oseberg Delta 24.05, 11:05 14:45 3:40 0:35 0:09 

Oseberg Feltsenter 24.05, 15:25 21:25 6:00 0:33 0:11 

Brage 24.05, 23:55 25.05, 08:10 8:15 0:51 0:11 

Troll A 25.05, 21:20 26.05, 04:25 7:05 0:41 0:11 

Troll B og C 26.05, 05:05 27.05, 05:30 24:25 0:51 0:34 

Fram Øst 27.05, 08:05 28.05, 05:15 21:10 0:50 0:13 

Fram Vest 28.05, 05:35 16:25 10:50 0:42 0:13 

Pan Pandora (inkl. Reg4-3) 28.05, 20:50 29.05, 10:00 13:10 0:44 0:11 

Jordbær (inkl. Reg4-12) 29.05, 12:35 30.05, 20:10 32:35 0:56 0:16 

Huldra 31.05, 01:35 05:10 4:35 0:36 0:19 

Veslefrikk 31.05, 07:35 20:25 12:50 0:31 0:16 

Oseberg Øst 31.05, 22:50 01.06, 04:20 05:30 0:20 0:06 

Oseberg C 01.06, 06:10 12:10 06:00 0:24 0:11 

Oseberg G 01.06, 13:35 18:35 04:55 0:25 0:11 

Bergen 02.06, 01:00 

Demobilisering 02.06, 10:30





Figur 5-6 Typisk sediment fra Pi-området. 

5.4 Frigg 



Dato: 2010-06-28 Side 11 av 29 

MANAGING RISK 

Stasjonsdypet på Frigg varierte fra 102 til 118m. Sedimentet består hovedsakelig av olivenbrun 

fin sand. Prøvetaking ble utført i henhold til programmet uten nevneverdige problemer. 

Stasjonsplassering og rekkefølge er vist i Figur 5-7. Det ble registrert sorte flekker i to av 

grabbprøvene fra FRI03. 

Stnr Senter Retning Avstand 

FRI01 TCP2 350 200 

FRI02 TCP2 58 196 

FRI03 TCP2 188 300 

FRIX2 TP1 249 1000 

FRI04 TP1 249 200 

FRIX1 TP1 249 100 

FRI11 TCP2 350 500 

FRI24 DP2 170 250 

FRI25 DP2 355 242 

FRI27 DP2 70 250 

FRI10R TCP2 135.4 14686 

Figur 5-7 Prøvetaking på Frigg, stasjonsplassering (ED50-UTM, sone 31) og rekkefølge. Det ble tatt 

biologi- og kjemiprøver fra alle stasjoner. 

5.5 Oseberg J 

Stasjonsdypet på Oseberg J varierte fra 103 til 106m. Sedimentet består hovedsakelig av 

olivenbrun fin sand. Prøvetaking ble utført i henhold til programmet uten nevneverdige







Dato: 2010-06-28 

VEDLEGG 

B 

INFORMASJON OM FARTØYET 

MANAGING RISK







Dato: 2010-06-28 

VEDLEGG 

C 

SURVEYRAPPORT, FUGRO 

MANAGING RISK

FUGRO SURVEY AS 

Prepared for: Statoil ASA / Multiclient 

TNE GET GOP STAV 

Forushagen 

4035 Stavanger 

Norway 

Contract Number: 

Nygårdsviken 1, 5164 Laksevåg, Norway 

Phone: +47 55 34 94 00, Fax: +47 55 34 94 50, http://www.fugro.no 

M/V LIBAS 

ENVIRONMENTAL SURVEY 2010 

REGION III 

Survey Period: 18 May to 2 June 2010 

Report Number: P9087-50 

1 Report Revision Morten Nielsen Thor-Inge Meltveit John A. Vint 21 June 2010 

0 Report Revision Morten Nielsen Thor-Inge Meltveit John A. Vint 9 June 2010 

Rev Description Prepared Checked Approved Date

STATOIL ASA / MULTICLIENT 

M/V LIBAS ENVIRONMENTAL SURVEY 2010 REGION III 

TABLE OF CONTENTS 

1. SUMMARY 1 

2. AREA MAP 2 

3. PROJECT SUMMARY 6 

4. NAVIGATION AND POSITIONING, SAMPLING SITES 7 

A. FIELD LOG 

APPENDIX 

FSAS Ref. P9087-50, Revision 1, 21 June 2010 Page i 

page



1. SUMMARY 

The scope of work was to provide accurate and reliable positioning of the “Libas” during environmental 

testing, Region III in the Norwegian sector of the North Sea. Sampling was to be carried out at several 

locations on each field. Positions were provided by Statoil ASA. 

Fugro Survey AS supplied one surveyor and DGPS System for this survey. 

The job was carried out in the period 18 May to 2 June 2010. 

FSAS Ref. P9087-50, Revision 1, 21 June 2010 Page 1



2. AREA MAP 




3. PROJECT SUMMARY 

Move 

Vessel: M/V Libas 

Location area: Region III, North Sea 

Personnel 

Fugro Survey: Eivind Jacobsen (Field Surveyor) 

Client representative: Rannveig Elise Otterlei / Endre Aas 

Navigation Systems 

Rig Positioning Software: Starfix Suite 8.1 SP3 with Seis RC 11 

Primary System: Trimble DGPS 

Secondary System: Trimble DGPS 

Gyro: From HPR System 

Key Events Time Weekday Date 

Personnel arrived onboard : 09:00 Tuesday 18 May 2010 

Equipment mobilised: 15:30 Tuesday 18 May 2010 

Started operations at region III: 06:30 Wednesday 19 May 2010 

Completed operations at region III: 20:00 Tuesday 1 June 2010 

Equipment demobilized: 09:00 Wednesday 2 June 2010 

Personnel departed from the vessel: 10:00 Wednesday 2 June 2010 




Position ID Easting Northing 

Alternative 

East 

Alternative 

North Comments 

PI NORD 

Pi Nord 436 538 6 431 101 Center sampling area 

Pi-14 436 715 6 431 278 

Pi-15 436 892 6 431 455 

Pi-16 437 245 6 431 808 

Pi-17 436 715 6 430 924 

Pi-18 436 892 6 430 747 

Pi-19 437 245 6 430 394 

Pi-20 437 952 6 429 687 

Pi-21 436 361 6 430 924 

Pi-22 436 184 6 430 747 

Pi-23 435 831 6 430 394 

Pi-24 436 361 6 431 278 

Pi-25 436 184 6 431 455 

Pi-26 435 831 6 431 808 

REG2-6 460 590 6 429 051 Area Reference station 

FRIGG 

FRI01 447 719 6 638 770 

FRI02 447 942 6 638 675 

FRI03 447 674 6 638 246 

FRIX2 446 694 6 638 180 

FRI04 447 440 6 638 466 

FRIX1 447 534 6 638 503 

FRI11 447 668 6 639 031 

FRI24 448 135 6 638 942 

FRI25 448 070 6 639 480 

FRI27 448 327 6 639 324 

FRI10R 458 362 6 627 966 Area reference station 

OSEBERG J 

Oseberg J 494 486 6 691 052 Center sampling area 

OSJ01 494 663 6 691 229 

OSJ02 494 840 6 691 406 

OSJ05 494 663 6 690 875 

OSJ06 494 840 6 690 698 

OSJ09 494 309 6 690 875 

OSJ10 494 132 6 690 698 

OSJ13 494 269 6 691 177 Center sampling area 

OSJ14 494 053 6 691 302 




APPENDICES 




A. FIELD LOG 

FSAS Ref. P9087-50, Revision 1, 21 June 2010 Appendix A



All times refers to Norwegian Local Time (UTC +2 hours) 

Time Event 

Tuesday 18 May 2010 

08:30 FSAS personnel Eivind Jacobsen left home, Gylfi Runarsson left Fugro workshop. 

09:00 E. Jacobsen & Gylfi Runarsson arrived Libas at Lie,Sotra. 

09:30 Started mobilization. 

15:30 Mobilization completed, ant offsets entered from CPR: 

Port GPS : x= -5m, y = 10.5m. 

Starbord GPS: x= 6.4m, y = 6.2m. 

Grabb : x= 10m, y = 20m. 

15:35 G. Runarsson departed Libas for Fugro workshop. 

15:45 Departed Lie for testing equipment. 

16:15 MOB drill 

16:30 On DP, testing equipment. 

17:30 Departed for sample-area, Yme. 

23:59 Enroute to Yme. 

Wednesday 19 May 2010 

06:15 Logging started. 

06:25 In position YMEB2-13, prepare to launch grab. 

06:30 Start sample-taking at YMEB2-13, fix # 2. 

09:30 On clients request, station YMEB2-4 is moved to new location dt underwater structure. New coordinates: 

581 692E, 6 402 406N. Position is 26m in 127° from original location. 

20:02 Completed station Yme Beta, heading for Yme Gamma 

23:59 Continue sampling at Yme Gamma. 

Thursday 20 May 2010 

00:00 Continue sampling at Yme Gamma. 

09:16 Completed Yme field, heading for station REF/REG, should be renamed to REG1-10. 

10:35 Start sampling at station REG1-10. 

11:13 Sampling completed on REG1-10, heading for Bream field. 

13:00 Start sampling at Bream field. 

19:03 Station BRE11 moved 42m in 220° dt rocks. New position 553 891E, 6 449 136N. 


23:59 Continue sampling at Bream field. 

Friday 21 May 2010 

00:00 Continue sampling at Bream field. 


05:30 Completed Bream field, heading for REG2-11. 

06:21 Start sampling at REG2-11. 

07:28 Completed REG2-11, heading for REG2-6. 


12:15 Completed REG2-6, heading for area Pi-sør. 

13:30 Start sampling at Pi sør field. 

19:45 Station Pi10 moved 40m in 29° dt rocks. New position 436 166E, 6 424 456N 

23:59 Continue sampling at Pi-sør field. 

Saturday 22 May 2010 

00:00 Continue sampling at Pi-sør field. 

01:10 Pi-sør area completed, heading for Pi-nord 

01:40 Start sampling at Pi-nord area. 




Saturday 22 May 2010 cont. 

12:45 Completed Pi-nord area, heading for FRI10R 

21:10 Start sampling FRI10R 

21:50 Completed FRI10R, heading for Frigg field. 

22:43 Start sampling on Frigg-field, FRIX2. 

23:59 Continue sampling at Frigg-field. 

Sunday 23 May 2010 

00:00 Continue sampling at Frigg-field. 

05:40 Completed Frigg area, heading for Oseberg J field. 

08:40 Start sampling at Oseberg J area, OSJ 11. 

09:10 Finish at OSJ11, but this station is not in the new program., Moving to OSJ10. 

15:08 Completed Oseberg J area, heading for Oseberg Sør. 

15:40 Start sampling at Oseberg Sør area, OSS07. 

19:39 Extra station OSS11X, position 488 598E, 6 695 135N. 

19:49 Extra station OSS11X2, position 488 520E, 6 695 306N. 

23:59 Continue sampling at Oseberg Sør field. 

Monday 24 May 2010 

00:00 Continue sampling at Oseberg Sør field. 

02:30 Completed Oseberg Sør area, heading for REG3-19. 




05:22 Completed REG3-17, heading for Tune Sør area. 

05:54 Start sampling at Tune Sør area. 

10:20 Completed Tune Sør area, heading for Oseberg Delta area. 

10:55 Start sampling at Oseberg Delta area. 

14:46 Completed Oseberg Delta area, heading for Oseberg Feltsenter. 

15:20 Start sampling at Oseberg Feltsenter area. 

21:30 Completed Oseberg Feltsenter area, heading for REG3-18. 


23:22 Completed REG3-18, heading for Brage. 

23:55 Start sampling Brage area. 

23:59 Continue sampling in Brage area. 

Tuesday 25 May 2010 

00:00 Continue sampling in Brage area. 

08:10 Brage area completed, heading for Bergen for Clientrep-change. 

12:45 Alongside Skarholmen, Askøy. 

14:00 Departed Skarholmen, heading for REG3-6. 


20:25 Completed REG3-6, heading for Troll A. 

21:20 Start sampling Troll A area. 

23:59 Continue sampling in Troll A area. 

Wednesday 26 May 2010 

00:00 Continue sampling in Troll A area. 

04:30 Completed Troll A area, heading for Troll B & C area. 

05:05 Start sampling at Troll B & C area. 

23:59 Continue sampling in Troll B & C area. 




Thursday 27 May 2010 

00:00 Continue sampling in Troll B & C area. 

05:29 Completed Troll B & C area, heading for REG3-12. 

06:19 start sampling at REG3-12. 

07:18 Completed REG3-12, heading for Fram area. 

08:04 Start sampling in Fram Øst area. 

23:59 Continue sampling in Fram Øst area. 

Friday 28 May 2010 

00:00 Continue sampling in Fram Øst area. 

16:28 Completed Fram Øst area, heading for REG3-11. 


17:51 Completed REG3-11, heading for Pan Pandora area. 

20:40 Start sampling in Pan Pandora area. 

23:59 Continue sampling in Pan Pandora area. 

Saturday 29 May 2010 

00:00 Continue sampling in Pan Pandora area. 

08:50 Completed Pan Pandora area, heading for REG4-3. 

09:19 Start sampling REG4-3. 

10:03 Completed REG4-3, heading for Jordbær field. 

12:34 Start sampling at Jordbær field. 

23:59 Continue sampling at Jordbær field. 

Sunday 30 May 2010 

00:00 Continue sampling at Jordbær field. 

18:10 Fire drill. 

18.38 Completed Jordbær-field, heading for REG4-12. 



23:59 En route to REG4-12. 

Monday 31 May 2010 

00:05 Start sampling on REG4-12. 

00:45 Completed sampling on REG4-12, heading for Huldra field. 

01:32 Start sampling at Huldra field. 

05:20 Huldra field completed, heading for REG3-13. 


07:02 Completed REG3-13, heading for Veslefrikk field. 

07:40 Start sampling at Veslefrikk area. 

20:26 Completed Veslefrikk area, heading for REG3-14. 


21:23 Completed REG3-14, heading for Oseberg Øst field. 

22:04 Start sampling at Oseberg Øst field. 

23:59 Continue sampling at Oseberg Øst field. 




Tuesday 1 June 2010 

00:00 Continue sampling at Oseberg Øst field 

04:20 Completed Oseberg Øst field, heading for REG3-15. 

05:10 start sampling at REG3-15. 

05:28 Completed REG3-15, heading for Oseberg C field. 

12:09 Completed Oseberg C field, heading for REG3-16. 


13.14 Completed REG3-16, heading for Oseberg G field. 

13:15 Station OSG05 moved 40m in 37° due to embillical on seabed. New position 482 948E, 6 711 345N. 

13:40 Start sampling at Oseberg G field. 

18:30 Oseberg G completed, heading for CCB, Sotra. ETA 2nd of June 0900 hrs. 

18:39 Logging stopped, start demobilization. 

21:45 De-mobilization completed. 

23:59 En route to CCB, Sotra. 

Wednesday 2 June 2010 

09:00 Demobilization completed. 

10:00 FSAS personnel departed “Libas”. 



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fungere effektivt under alle forhold. 

Global impact for a safe and sustainable future: 

Besøk vår internettside for mer informasjon: www.dnv.no






Date : 2010-11-30 

MANAGING RISK 

APPENDIX 

2 

TEST REPORT – SAMPLING AND BIOLOGICAL ANALYSES


Report 

Environmental Sediment Survey Frigg 

2010 

Test Report 

The project 2010/00119-Environmental Sediment Survey 

2010 - Region III 

TEST 083 

Report No./DNV Reg No.: 2010 - 1478/ 12O31ER-6 

Rev 01, 2010-10-04


Report for The project 2010/00119-Environmental Sediment Survey 2010 - 

Region III 


Table of Contents 



Date : 2010-10-08 Page ii of ii 

MANAGING RISK 

1 INTRODUCTION ............................................................................................................. 1 

2 SAMPLING........................................................................................................................ 1 

3 SORTING........................................................................................................................... 2 

4 SPECIES IDENTIFICATION ......................................................................................... 2 

5 TOP 10 ................................................................................................................................ 3 

6 INDICES............................................................................................................................. 5 

Appendix 1 Check list 

Appendix 2 Details from sampling 

Appendix 3 Species list



Region III 


1 INTRODUCTION 



Date : 2010-10-08 Page 1 of 5 

MANAGING RISK 

On behalf of the project 2010/00119-Environmental Sediment Survey 2010-Region III DNV’s 

Biology Laboratory has conducted macro fauna sampling and analyses from the Frigg field 2010. 

The work was conducted based on program prepared by Total E&P Norge AS and carried out as 

on the same survey as the regional environmental monitoring in Region III. 

DNV’s Biology laboratory (DNV Energy) is accredited by the Norwegian Accreditation 

(accreditation number TEST 083) for performing sampling and analyses of macro benthic fauna. 

Accreditation is according to NS-EN ISO/IEC 17025. 

The report is prepared according to the DNV procedure OP-ENENO752-5-3-14. 

Sampling, sorting and taxonomic analyses are carried out according to relevant procedures 

described in DNV’s Quality System. 

2 SAMPLING 

The sampling was carried out from the vessel M/V Libas the 22. and 23. of May 2010. Altogether 

11 stations were sampled for biological and chemical parameters. 

The fieldwork was performed according to Aktivitetsforskriften (Kap. X-1 - § 51 og 52, Vedlegg 

1; Teknisk vedlegg 2 – Sedimentovervåkning (Ptil, SFT, Shdir 2001) and DNV’s accredited 

procedures for this kind of work (Test 083). 

Location: Frigg, Nordsjøen 

Date: 22.05.10 - 23.05.10 

Survey Leader: Sam-Arne Nøland (DNV) 

Survey peronnnel: The feildwork was carried out with a 6-hours shift work: 

Sam-Arne Nøland (DNV), survey Leader 

Thomas Møskeland (DNV), shift Leader 

Øyvind Fjukmoen (DNV), shift Leader 

Marte Braathen (DNV) 

Christian Volan (DNV) 

Gunn Mari Michaelsen (MoLab) 

Odd Strandvold (MoLab) 

The work was coordinated by Endre Aas, Statoil. 

Appendix 2 shows the details from the sampling.



Region III 


3 SORTING 



Date : 2010-10-08 Page 2 of 5 

MANAGING RISK 

The sorting was carried out by Christian Volan, Ludvig Søgnen Jensen, Jacob Søgnen Jensen, 

Marthe Røgeberg, Theis Alexander Aspholm, Vegard Bjørnestad Skar, Peter Nikolai Knudsen, 

Tuva Kristine Østby, Kasper Nøland, Lisa Aurora Hauff, Jostein Olafsen, Aksel Gravir, Anders 

Glette Johnsen, Anders Westin, Charlotte Krossholm, Einar Ingebrigtsen and Tore Martinsen 

Olsvold in the Biology Laboratory at Høvik in June and July 2010. 

Procedures: OP-ENENO752-5-3-7, OP-ENENO752-5-3-9. 

4 SPECIES IDENTIFICATION 

Identification of species was carried out in July-September 2010. 

Mollusca was identified by Per Bie Wikander (Molltax) and Amund Ulfsnes 

Echinodermata was identified by Amund Ulfsnes 

Crustacea was identified by Thomas Møskeland 

Varia and Polychaeta was identified by Øystein Stokland (Marine Bunndyr AS). 

Procedures: OP-ENENO752-5-3-10, OP-ENENO752-5-3-12.



Region III 


5 TOP 10 

10 most dominant species, Frigg 2010. 



Date : 2010-10-08 Page 3 of 5 

MANAGING RISK 




Owenia fusiformis 92 10,80 39,55 Amphiura filiformis 47 4,09 64,81 

Cerianthus lloydi 45 5,28 44,84 Unciola planipes 31 2,70 67,51 

Amphipholis squamata 45 5,28 50,12 Parvicardium minimum 29 2,53 70,03 

Parvicardium minimum 45 5,28 55,40 Goniada maculata 25 2,18 72,21 


Prionospio cirrifera 23 2,70 62,56 Scoloplos (Scoloplos) armiger 23 2,00 76,22 

Nemertina indet. 18 2,11 64,67 Spiophanes bombyx 22 1,92 78,14 

Edwardsia sp. 16 1,88 66,55 Edwardsia sp. 20 1,74 79,88 

Spiophanes wigleyi 16 1,88 68,43 Paramphinome jeffreysii 17 1,48 81,36 




Cerianthus lloydi 29 5,68 28,18 Spiophanes bombyx 74 8,97 23,52 


Parvicardium minimum 24 4,70 37,77 Edwardsia sp. 35 4,24 33,45 

Owenia fusiformis 23 4,50 42,27 Parvicardium minimum 34 4,12 37,58 

Chaetozone setosa complex 20 3,91 46,18 Amphiura filiformis 33 4,00 41,58 

Goniada maculata 16 3,13 49,32 Siphonoecetes kroeyeranus 32 3,88 45,45 

Amphiura filiformis 14 2,74 52,05 Spiophanes wigleyi 27 3,27 48,73 

Spiophanes wigleyi 13 2,54 54,60 Chaetozone setosa complex 26 3,15 51,88 

Hippomedon denticulatus 13 2,54 57,14 Ophiocten affinis 22 2,67 54,55 

Myriochele oculata 12 2,35 59,49 Prionospio cirrifera 22 2,67 57,21 

Fri 10R (135/14686) Number % Cum % Fri 11 (350/500m) Number % Cum % 

Owenia fusiformis 389 34,12 34,12 Myriochele oculata 533 45,21 45,21 



Phoronis muelleri 36 3,16 61,14 Parvicardium minimum 40 3,39 66,07 

Thyasira flexuosa 29 2,54 63,68 Spiophanes bombyx 32 2,71 68,79 

Caudofoveata spp. 22 1,93 65,61 Scoloplos (Scoloplos) armiger 26 2,21 70,99 

Urothoe elegans 21 1,84 67,46 Paramphinome jeffreysii 24 2,04 73,03 

Goniada maculata 19 1,67 69,12 Unciola planipes 20 1,70 74,72 

Harpinia antennaria 18 1,58 70,70 Aonides paucibranchiata 20 1,70 76,42 


Aonides paucibranchiata 16 1,40 73,60 Nemertina indet. 14 1,19 78,88 

Cont.



Region III 




Date : 2010-10-08 Page 4 of 5 

MANAGING RISK 

Fri 24 (170/250m) Number % Cum % Fri 25 (355/242m) Number % Cum % 

Myriochele oculata 380 35,12 35,12 Myriochele oculata 151 16,50 16,50 

Owenia fusiformis 101 9,33 44,45 Owenia fusiformis 83 9,07 25,57 

Unciola planipes 70 6,47 50,92 Unciola planipes 66 7,21 32,79 

Amphiura filiformis 53 4,90 55,82 Spiophanes bombyx 64 6,99 39,78 

Aonides paucibranchiata 46 4,25 60,07 Amphiura filiformis 63 6,89 46,67 



Spiophanes bombyx 25 2,31 68,48 Paramphinome jeffreysii 27 2,95 58,58 

Cerianthus lloydi 22 2,03 70,52 Scoloplos (Scoloplos) armiger 27 2,95 61,53 

Parvicardium minimum 20 1,85 72,37 Aricidea catherinae 27 2,95 64,48 

Aricidea catherinae 20 1,85 74,21 Nemertina indet. 19 2,08 66,56 

Fri 27 (70/250m) Number % Cum % Fri X1 (249/100m) Number % Cum % 

Myriochele oculata 392 39,40 39,40 Spiophanes bombyx 108 14,71 14,71 

Owenia fusiformis 82 8,24 47,64 Cerianthus lloydi 53 7,22 21,93 


Aonides paucibranchiata 45 4,52 59,20 Parvicardium minimum 48 6,54 35,01 

Antalis entalis 43 4,32 63,52 Spiophanes wigleyi 45 6,13 41,14 


Unciola planipes 25 2,51 68,94 Cirriformia tentaculata 34 4,63 50,41 

Aricidea catherinae 24 2,41 71,36 Hippomedon denticulatus 30 4,09 54,50 

Echinocyamus pusillus 19 1,91 73,27 Chaetozone setosa complex 28 3,81 58,31 

Parvicardium minimum 15 1,51 74,77 Owenia fusiformis 26 3,54 61,85 


Fri X2 (249/1000m) Number % Cum % 

Myriochele oculata 310 38,70 38,70 

Owenia fusiformis 111 13,86 52,56 

Amphiura filiformis 49 6,12 58,68 

Aricidea catherinae 30 3,75 62,42 

Paramphinome jeffreysii 24 3,00 65,42 

Ophiocten affinis 19 2,37 67,79 

Scaphopoda spp. 16 2,00 69,79 

Parvicardium minimum 15 1,87 71,66 

Aonides paucibranchiata 14 1,75 73,41 

Goniada maculate 13 1,62 75,03



Region III 


6 INDICES 



Date : 2010-10-08 Page 5 of 5 

MANAGING RISK 

Numbers of individuals (N) and species (S), depth, Shannon-Wiener diversity index (H’), Pielou’s 

evenness index (J), and expected number of species per 100 individuals (ES100) for each station at Frigg 

2010 (ex. juv.). 

Station º / m Depth (m) S N H' J ES100 

FRI 1 350/200 106 79 852 4.8 0.75 33 

FRI 2 758/196 105 77 1148 3.5 0.56 25 

FRI 3 188/300 102 78 511 5.0 0.80 39 

FRI 4 249/200 111 100 825 5.3 0.79 39 

FRI 10R 135/ 14686 105 95 1140 4.1 0.63 31 

FRI 11 350/500 105 80 1179 3.7 0.58 27 

FRI 24 170/250 107 80 1082 4.2 0.66 30 

FRI 25 355/242 103 87 915 4.9 0.76 34 

FRI 27 70/250 105 86 995 4.0 0.63 29 

FRI X1 249/100 106 71 734 4.9 0.79 32 

FRI X2 249/1000 118 88 801 4.0 0.62 30



Region III 


APPENDIX 

1 

CHECK LIST 

- o0o - 



Date : 2010-10-08 Page 1-6 

MANAGING RISK



Region III 


APPENDIX 

2 

DETAILS FROM SAMPLING 



Date : 2010-10-08 Page 1-7 

MANAGING RISK

Frigg 2010 



Region III 




Date : 2010-10-08 Page 1-8 

MANAGING RISK 

UTM Org./ NPD/ Kjemi Bio 

St. nr. º / m N E Bio Korn THC Metall PAH Dyp Dato Start Slutt Tid #1 #2 #3 #1 #2 #3 #4 #5 Grabb Bom Beskrivelse Kommentarer 

FRI01 350 200 6638770 447719 5 1 3 3 106 23.mai 02:40 03:10 00:30 8 8 8 8 8 8 8 8 B25/B17 0 Brungrønn fin sand 


FRI03 188 300 6638246 447674 5 1 5 3 5 102 22.mai 23:40 00:25 00:45 6 7 8 6 7 8 7 8 B25 0 Brungrønn fin sand Svarte flekker i gr.4 og 5 

FRIX2 249 1000 6638180 446694 5 1 3 3 111 22.mai 22:40 23:20 00:40 7 7 6 7 7 6 7 8 B25 1 Brungrønn fin sand 


FRIX1 249 100 6638503 447534 5 1 3 3 105 23.mai 01:15 01:50 00:35 8 8 9 9 8 7 9 9 B25/B17 0 Brungrønn fin sand 



FRI25 355 242 6639480 448070 5 1 3 3 105 23.mai 05:05 05:40 00:35 7 7 7 7 7 7 7 6 B25/B17 0 Brungrønn fin sand m/noe grus 

FRI27 70 250 6639324 448327 5 1 3 3 106 23.mai 04:30 05:00 00:30 9 8 8 9 9 8 8 9 B25/B17 0 Brungrønn fin sand Noe svart i gr. 3? 

FRI10R 135.4 14686 6627966 458362 5 1 5 3 5 118 22.mai 21:00 21:50 00:50 9 8 8 10 10 9 8 8 B15 m/ lodd 1 Brungrønn fin sand Sjikt



Region III 


APPENDIX 

3 

SPECIES LIST 



Date : 2010-10-08 Page 1-8 

MANAGING RISK



Region III 


VARIA 

Hydrozoa 



Date : 2010-10-08 Page 1-9 

MANAGING RISK 

Fri 01 Fri 02 Fri 03 Fri x2 Fri 04 Fri X1 Fri 11 Fri 24 Fri 25 Fri 27 Fri 10R 

Acaulis primarius 0 8 2 0 4 7 6 9 13 2 0 

Molgulidae spp. 0 0 0 0 0 0 0 3 1 1 0 

Pennatula phosphorea 0 0 0 0 0 0 0 0 0 0 1 

ANTHOZOA 

Cerianthus lloydi 45 23 29 4 47 53 10 22 19 11 2 

Edwardsia sp. 16 20 9 1 35 34 15 14 16 7 1 

Hydroida indet. 1 0 0 0 0 0 0 0 0 0 0 

Virgularia mirabilis 0 0 0 0 1 0 0 1 0 0 0 

Caryophyllia smithii 0 0 0 0 0 1 0 0 0 0 0 

Anthozoa indet. 1 0 7 0 2 0 0 0 0 0 0 

Onchnesoma steenstrupii steenstrupii 0 1 0 0 0 0 0 0 0 0 0 

OTHERS 

Phoronis muelleri 0 5 1 5 1 0 2 10 5 3 36 

Nemertina indet. 18 9 5 5 12 16 14 11 19 10 11 

Platyhelminthes spp. 0 1 0 1 0 0 1 0 2 0 0 

Nematoda spp. 0 1 0 0 0 0 1 5 3 5 0 

Bryozoa indet. 0 0 0 0 2 3 0 0 0 0 0 

Siboglinidae indet. 0 0 0 0 0 0 0 0 0 0 2 

Oligochaeta indet. 0 0 0 0 0 0 0 0 2 1 0 

POLYCHAETA 

POLYNOIDAE 

APHRODITIDAE 

Aphrodita aculeata 0 0 0 1 0 0 1 1 0 0 0 

SIGALIONIDAE 

Pholoe baltica 2 0 2 3 5 5 5 3 2 0 4 

Sthenelais limicola 0 7 5 6 4 4 1 4 1 3 5 

PHYLLODOCIDAE 

Chaetoparia nilssoni 1 0 2 0 1 1 2 0 0 0 1 

Eteone longa 2 0 1 0 0 0 0 0 0 0 0 

Eteone c.f flava 0 0 0 0 1 0 2 0 0 0 0 

Eteone foliosa 0 0 0 0 0 0 0 0 1 0 0 

Phyllodoce rosea 0 1 0 0 0 0 0 1 0 0 0 

Phyllodoce mucosa 0 0 0 0 1 0 0 0 0 0 1 

Phyllodocidae indet. juv 0 0 0 0 1 0 0 0 0 0 0 

GLYCERIDAE 

Glycera alba 2 0 1 0 0 1 1 0 1 1 1 

Glycera lapidum 5 1 7 2 14 11 3 4 13 3 2 

Goniada maculata 4 25 16 13 16 8 13 14 10 7 19 

Glycinde nordmanni 0 1 2 2 0 0 1 0 1 1 0 

SPHAERODORIDAE 

Sphaerodorum gracilis 0 1 0 1 0 0 0 0 0 0 0 

NEREIDAE



Region III 




Date : 2010-10-08 Page 1-10 

MANAGING RISK 


Nereididae indet. 0 0 0 0 0 0 0 0 0 1 1 

NEPTHYIDAE 

Nephtys longosetosa 0 0 0 0 0 0 0 0 1 0 0 

Nephtys caeca 9 1 2 1 5 0 2 2 3 6 10 

Nephtys hombergii 0 1 1 3 1 1 3 0 1 0 1 

Nephtys paradoxa 0 0 0 0 1 0 0 0 0 0 0 

Nephtys sp. juv 4 5 3 4 2 3 2 6 2 3 10 

AMPHINOMIDAE 

Paramphinome jeffreysii 11 17 8 24 21 16 24 14 27 10 9 

Onuphidae 0 0 0 0 0 0 0 0 0 0 0 

Hyalinoecia tubicola 6 3 1 2 3 1 5 2 2 3 0 

Onuphis conchylega 0 0 0 0 0 0 3 5 4 0 0 

ORBINIIDAE 

Scoloplos (Scoloplos) armiger 15 23 6 7 12 10 26 25 27 15 12 

PARAONIDAE 

Aricidea catherinae 5 9 5 30 12 0 7 20 27 24 14 

Aricidea (Acmira) cerrutii 0 0 0 2 0 1 0 0 1 1 7 

Aricidea laubieri 0 0 0 1 1 0 0 1 0 1 0 

Aricidea wassi 0 1 0 0 0 0 0 1 0 0 0 

Levinsenia gracilis 0 0 1 0 0 0 0 0 0 0 6 

Paradoneis lyra 2 0 1 0 0 1 0 0 0 0 0 

SPIONIDAE 

Aonides paucibranchiata 7 17 2 14 7 2 20 46 52 45 16 

Spio filicornis 9 7 7 2 1 3 1 9 9 3 1 

Dipolydora coeca 0 0 0 1 0 0 0 0 0 0 0 

Pseudopolydora antennata 4 1 2 4 1 1 0 0 1 0 3 

Pseudopolydora pulchra 1 0 0 1 0 1 0 0 1 0 0 

Prionospio cirrifera 23 6 8 9 22 22 11 16 15 11 10 

Prionospio fallax 1 0 0 1 0 1 0 0 1 0 6 

Scolelepis (Scolelepis) foliosa 0 0 0 1 3 0 1 0 1 1 1 

Spiophanes kroyeri 0 0 0 3 1 1 2 2 2 8 4 

Spiophanes bombyx 123 22 115 11 74 108 32 25 64 11 7 

Spiophanes wigleyi 16 5 13 2 27 45 11 1 9 1 3 

POECILOCHAETIDAE 

Poecilochaetus serpens 0 0 0 0 0 1 0 0 0 0 0 

CIRRATULIDAE 

Aphelochaeta sp. 0 1 0 0 4 7 0 1 0 1 0 

Chaetozone setosa complex 15 5 20 7 26 28 14 1 8 5 5 

Cirriformia tentaculata 9 0 0 0 19 34 0 0 0 0 0 

Caulleriella sp. 0 1 4 2 1 3 0 3 4 1 0 

FLABELLIGERIDAE 

Diplocirrus glaucus 1 0 0 5 1 0 1 0 0 1 5 

OPHELIIDAE 

Ophelina cylindricaudata 0 0 0 0 0 0 0 0 0 0 1 

Ophelina abranchiata 0 0 0 2 0 0 0 0 1 2 4 

SCALIBREGMATIDAE



Region III 




Date : 2010-10-08 Page 1-11 

MANAGING RISK 


Scalibregma inflatum 0 0 0 1 0 0 0 0 0 0 0 

OWENIDAE 

Myriochele oculata 122 507 12 310 120 11 533 380 151 392 218 

Myriochele danielsseni 0 0 0 0 0 0 0 1 5 11 1 

Owenia fusiformis 92 190 23 111 21 26 151 101 83 82 389 

Owenia fusiformis juv 6 16 1 9 4 2 5 7 5 5 3 

PECTINARIIDAE 

Pectinaria (Lagis) koreni 0 0 0 1 0 1 0 0 0 1 5 

Pectinaria (Amphictene) auricoma 0 0 4 3 6 5 6 1 6 2 7 

Pectinaria sp. 4 2 2 0 2 6 2 0 1 1 7 

AMPHARETIDAE 

Ampharete lindstroemi 0 1 0 1 0 0 2 1 0 1 1 

Anobothrus gracilis 2 2 4 2 3 2 7 5 4 0 2 

Sabellides octocirrata 0 0 0 1 0 0 0 1 0 2 5 

Samytha sexcirrata 0 0 0 0 0 0 1 0 0 0 0 

Mugga wahrbergi 0 0 0 0 0 0 0 0 0 0 2 

Pterolysippe vanelli 0 0 0 0 0 0 0 0 0 0 1 

Amphicteis gunneri 1 0 0 0 1 0 0 0 1 2 0 

TEREBELLIDAE 

Lanice conchilega 0 0 0 2 2 0 0 0 0 0 1 

Hauchiella tribullata 0 2 2 0 1 0 2 1 2 2 0 

TRICOBRANCHIDAE 

Terebellides stroemii 0 0 0 0 0 0 0 0 0 0 2 

SABELLIDAE 

Jasmineira caudata 0 1 0 2 2 0 0 2 1 0 2 

Jasmineira sp. 0 0 1 1 1 1 2 0 3 0 10 

Euchone sp. 0 0 0 0 0 0 0 0 0 0 1 

Chone sp. 0 2 0 0 0 0 0 0 0 0 5 

SERPULIDAE 

Ditrupa arietina 10 0 7 0 8 13 0 0 0 0 0 

Hydroides norvegicus 1 0 5 0 1 2 0 0 0 0 0 

CRUSTACEA 

OTHERS 

Paguridae spp. 3 2 3 5 2 2 0 9 6 4 2 

Sarsinebalia typhlops 1 0 0 0 0 0 0 0 0 0 0 

Astacilla dilatata 1 10 1 1 3 2 4 0 4 7 0 

Amphilochoides sp. 1 3 1 0 1 0 0 1 0 0 0 

Lepidepecreum longicornis 2 4 1 2 2 1 3 0 5 2 0 

Liocarcinus sp. 0 0 0 0 1 0 0 0 0 0 0 

Hyas coarctatus 0 0 0 0 0 1 0 0 0 0 0 

GAMMARIDEA 

Tmetonyx cicada 0 0 0 0 0 0 0 0 1 1 0 

Hippomedon denticulatus 9 8 13 1 19 30 8 5 11 8 3 

Gitanopsis sp. 1 0 1 0 3 0 0 2 0 0 0 

Leucothoe lilljeborgi 0 0 0 1 0 0 0 6 0 0 0 

Harpinia antennaria 0 0 1 8 0 0 0 0 0 0 18



Region III 




Date : 2010-10-08 Page 1-12 

MANAGING RISK 


Argissa hamatipes 0 1 0 1 1 1 2 1 0 2 1 

Ampelisca brevicornis 2 0 1 0 7 2 0 2 0 2 0 

Ampelisca diadema/tenuicornis 9 3 4 4 10 11 8 7 9 5 6 

Ampelisca macrocephala 2 1 0 1 1 2 0 0 0 1 2 

Ischyroceridae sp. 0 0 0 0 0 0 0 0 0 0 1 

Autonoe longipes 12 3 8 1 6 12 3 5 8 1 1 

Siphonoecetes (Centraloecetes) kroeyeranus 38 7 25 0 32 21 3 4 3 9 0 

Pontocrates spp. 4 2 1 0 2 1 3 2 3 4 1 

Synchelidium spp. 1 2 1 1 3 0 0 0 0 2 0 

Westwoodilla caecula 2 0 1 2 4 2 1 0 0 0 1 

Ampelisca sp. 0 0 0 0 0 0 1 0 0 0 0 

Ampelisca c.f. typica 2 0 0 0 0 0 0 0 0 0 0 

Lysianassidae indet. 0 0 0 0 0 0 0 0 1 0 0 

Caprellidae spp. 1 5 1 1 2 0 11 3 5 2 0 

Bathyporeia c.f. elegans 1 2 1 1 1 2 0 4 2 3 0 

Megamphopus cornutus 1 1 4 0 2 0 1 1 0 0 1 

Tryphosites longipes 6 0 1 0 1 2 1 0 2 3 0 

Unciola planipes 5 31 1 1 2 5 20 70 66 25 0 

C.f. Pardaliscidae sp. 1 0 0 0 0 0 0 0 0 0 0 

Scopelocheirus hopei 1 0 0 0 0 0 0 0 0 0 0 

Photis longicaudata 5 0 5 0 10 0 0 4 2 0 0 

Monoculodes sp. 0 1 1 0 1 0 0 0 0 1 0 

Acidostoma obesum 0 1 0 1 1 1 4 4 1 2 0 

Urothoe elegans 0 1 0 5 1 0 0 1 1 3 21 

Leptognathia sp. 0 2 0 0 0 0 0 0 0 0 0 

Hippomedon sp. 0 0 1 0 0 0 0 0 0 0 0 

Anonyx c.f. lilljeborgii 0 0 0 0 1 0 0 0 0 0 0 

Tryphosella c.f. nanoides 1 0 0 0 0 2 0 0 0 0 0 

Iphimediidae sp. 0 0 0 0 0 0 0 0 0 0 1 

Natatolana borealis 0 0 0 0 0 0 0 0 0 0 1 

CUMACEA 

Eudorellopsis deformis 3 2 4 1 6 2 0 6 2 2 1 

Pseudocuma sp. 0 0 0 1 0 0 0 1 1 0 0 

Hemilamprops roseus 0 0 0 1 2 0 0 0 0 0 0 

Diastylis spp. 1 0 3 0 3 0 2 0 0 3 3 

Leucon sp. 0 0 0 0 0 0 0 0 0 0 1 

Eudorella truncatula/hirsutha 0 0 0 0 0 0 0 0 0 0 3 

MOLLUSCA 

APLACOPHORA 

Caudofoveata spp. 0 0 0 0 0 0 1 0 0 0 22 

Neomenia carinata 1 1 1 0 6 1 0 1 2 2 0 

GASTROPODA 

Euspira pulchella 0 0 1 0 0 0 0 1 0 0 0 

Euspira montagui 0 0 1 0 1 0 0 1 0 1 0 

Aporrhais c.f serresianus 0 0 0 4 0 0 1 0 1 1 1 

Melanella sp. 0 0 0 1 0 0 0 0 0 0 0



Region III 




Date : 2010-10-08 Page 1-13 

MANAGING RISK 


Epitonium trevelyanum 0 0 0 0 0 0 1 0 0 0 0 

OPISTOBRANCHIA 

Acteon tornatilis 1 1 0 1 0 0 2 5 1 2 0 

Cylichna cylindracea 2 2 0 4 1 0 1 1 0 0 7 

Philine scabra 0 1 0 1 0 0 2 0 0 0 0 

Cylichnina umbilicata 0 3 0 5 1 0 5 2 1 1 1 

Nudibranchia spp. 1 1 0 0 0 0 1 1 3 3 0 

Volvulella acuminata 0 1 0 0 0 0 0 0 0 0 0 

Scaphander punctostriatus 0 0 0 0 0 0 0 1 0 0 1 

Turbonilla c.f. crenata 0 0 0 0 0 0 0 0 1 0 0 

BIVALVIA 

Abra prismatica 0 0 0 0 0 0 3 0 2 0 6 

Abra nitida 0 0 1 0 2 0 0 0 0 0 0 

Acanthocardia echinata 0 0 0 0 0 0 0 0 0 0 3 

Arctica islandica 0 0 0 1 2 1 1 0 0 0 0 

Axinulus croulinensis 0 0 0 0 0 0 0 0 0 0 14 

Cuspidaria cuspidata 0 0 0 0 0 0 1 0 0 0 0 

Hiatella arctica 0 0 0 0 3 0 0 0 0 0 1 

Kurtiella bidentata 0 1 0 0 0 0 0 1 0 0 0 

Lucinoma borealis 4 5 0 1 0 0 3 4 12 1 2 

Montacuta substriata 0 0 0 2 0 0 0 0 0 1 0 

Phaxas pellucidus 0 0 0 1 0 0 0 0 0 0 0 

Tellimya ferruginosa 1 1 4 1 1 0 0 1 1 1 0 

Tellimya tenella 0 0 0 3 1 1 0 0 0 0 5 

Thracia papyracea 0 0 0 0 0 0 0 1 0 1 1 

Thyasira flexuosa 7 0 1 7 1 0 1 1 2 1 29 

Timoclea ovata 12 3 6 1 9 4 3 10 4 1 9 

Parvicardium minimum 45 29 24 15 34 48 40 20 17 15 7 

Bivalvia indet 2 0 0 0 0 0 0 0 0 0 0 

Thyasira equalis 0 0 1 0 0 0 0 0 0 0 0 

Astarte sulcata 0 0 1 0 2 0 0 0 1 0 0 

Thracia villosiuscula 0 0 0 1 0 0 0 0 0 0 1 

Limatula gwyni 0 0 0 1 0 0 0 0 0 0 0 

Thyasira biplicata 0 0 0 0 1 0 0 0 0 0 1 

Dosinia lupinus 0 0 0 0 0 0 1 0 0 0 0 

Thyasira succisa 0 0 0 0 0 0 0 0 0 3 0 

Thyasira obsoleta 0 0 0 0 0 0 0 0 0 0 3 

Adontorhina similis 0 0 0 0 0 0 0 0 0 0 2 

Scaphopoda spp. 0 0 0 16 0 0 0 0 0 0 0 

Antalis entalis 0 12 0 0 3 0 11 16 2 43 4 

Antalis spp. 0 0 0 0 0 0 0 0 0 2 1 

ECHINODERMATA 

ASTEROIDA 

Asteroidea spp.juv. 8 7 10 6 8 8 10 8 7 6 1 

OPHIUROIDEA 

Amphiura filiformis 4 47 14 49 33 48 55 53 63 70 54



Region III 




Date : 2010-10-08 Page 1-14 

MANAGING RISK 


Amphiura chiajei 1 0 0 0 1 0 1 0 0 0 0 

Ophiocten affinis 16 5 12 19 22 25 7 41 30 29 17 

Ophiuroidea spp.juv. 5 12 23 9 15 4 6 6 3 2 4 

Amphipholis squamata 45 0 7 0 1 0 0 0 0 0 0 

Ophiactis balli 1 0 0 0 0 1 0 0 0 0 0 

Ophiura albida 0 0 2 0 0 1 0 0 0 0 0 

ECHINOIDEA 

Echinocardium flavescens 2 2 6 6 2 3 5 1 2 1 4 

Echinoidea spp.juv. 86 200 46 132 93 27 83 100 20 60 145 

Echinocyamus pusillus 5 4 0 7 7 1 7 10 3 19 0 

Echinus sp. 0 0 0 0 0 0 0 0 0 0 2 

Holothuroidea sp. 0 6 0 0 0 0 0 0 0 0 0 

Labidoplax buskii 0 0 0 1 3 0 4 4 5 3 3 

Psolus sp. juv 0 0 1 0 0 0 0 0 0 0 0 

Pseudothyone raphanus 0 0 0 0 1 0 1 0 2 0 0


Det Norske Veritas (DNV) is a leading, independent provider of services for managing risk with a global 

presence and a network of 300 offices in 100 different countries. DNV’s objective is to safeguard life, 

property and the environment. 

DNV assists its customers in managing risk by providing three categories of service: classification, 

certification and consultancy. Since establishment as an independent foundation in 1864, DNV has 

become an internationally recognised provider of technical and managerial consultancy services and 

one of the world’s leading classification societies. This means continuously developing new 

approaches to health, safety, quality and environmental management, so businesses can run smoothly 

in a world full of surprises. 


Learn more on www.dnv.com






Date : 2010-11-30 

APPENDIX 

3 

ANALYSIS REPORT - MOLAB 

MANAGING RISK

Molab as, 8607 Mo i Rana 

Telefon: 75 13 63 50 

Besøksadr. Mo i Rana: Mo Industripark 

Besøksadr. Oslo: Kjelsåsveien 174 

Besøksadr. Glomfjord: Ørnesvn. 3 

Besøksadr. Porsgrunn: Hydroveien 67 

Organisasjonsnr.: NO 953 018 144 MVA 

Appendix 

Chemical analysis 

Frigg 2010 Appendix 

Side 1


Side 2 

1.0 Quality assurance ....................................................................................... 4 

1.1 Grain size distribution.................................................................................... 4 

1.2 Total organic matter ...................................................................................... 4 

1.3 Chemical analysis ......................................................................................... 5 

2.0 Analytical results ........................................................................................ 6 

2.1 Sediment characterization............................................................................. 6 

2.2 Chemical analysis ......................................................................................... 9

Molab AS is accredited by Norwegian Accreditation to perform chemical analyses, 

accreditation number Test 032. The accreditation is according to NS-EN ISO/IEC 17025. 

Personnel 

Field work: Gunn Mari Michaelsen, 

Odd Strandvoll 

Grain size distribution: Terje Kolberg, 

Eli Ellingsen 

TOM analyses: Terje Kolberg, 

Eli Ellingsen 

Metal analyses: Gunn Mari Michaelsen, 

Terje Pedersen, 

Hanne Skog Lillevik, 

Wenche Brennbakk 

THC analyses: Daniel Perez, 

Anna Jønsson, 

Tove Kristin Dokka Torstensen 

Selected hydrocarbon analyses: Tove Kristin Dokka Torstensen 

Report preparation: Tove Kristin Dokka Torstensen 

Accuracy and precision are controlled by analysis of certified reference material. 

Details concerning measurement uncertainty will be given by request. Restsamples will be 

stored deepfreezed in 1 year after Molab have received the samples. 


Side 3

1.0 Quality assurance 

1.1 Grain size distribution 


Side 4 

An in house standard (Glomfjord) has been analyzed after the same procedure and together 

with the samples. 

The results of the analyses of the in house standard are given in Table 1.1-1. The results of the 

present analysis are in good accordance with the results from 2009. 

Table 1.1-1 Grain size distribution, in house standard Glomfjord results for 2009 and 2010 (% dried 

sediment) 

Sample Median diameter Classification St. deviation Skewness Kurtosis 

MdΦ 

SDΦ SkΦ KΦ 

Average 2009 2,84 Fine sand 1,16 0,28 2,13 

St. dev 2009 0,04 0,09 0,05 0,06 

Average 2010 2,85 Fine sand 1,11 0,28 2,14 

St. dev 2010 0,02 0,05 0,03 0,08 

Molab has participated in an interlaboratory comparison called WEPAL ISE. The results are 

given in Table 1.1-2. 

Table 1.1-2 Grain size distribution, results from an interlaboratory comparison WEPAL ISE 

(International Soil-Analytical Exchange) October - December 2009 

Sample 986 919 884 881 

Fraction < 63 µm % 9.85 20.2 55.1 93.6 Molab 

NDA mean 9.29 20.35 53.63 93.8 

Fraction > 63 µm % 90.2 79.8 44.9 6.45 Molab 

NDA mean 89.76 78.1 46.05 6.825 

1.2 Total organic matter 

Calsium carbonate and in house standards was heated to 480 °C together with the samples. 

The results are given in Table 1.2-1. 

Table1.2-1 Quality assurance analyses for total organic matter 

CaCO3 In house standard Glomfjord 

Average 2009 0.10 1.46 

SD 2009 0.04 0.09 

Average 2010 0.14 1.48 

SD 2010 0.03 0.09

Molab has participated in a interlaboratory comparison called WEPAL ISE. The results are 

given in Table 1.2-2 

Table 1.2-2 Total organic matter, results from an interlaboratory comparison WEPAL ISE 

(International Soil-Analytical Exchange) October - December 2009 

Sample 986 919 884 881 

Org.matter (L.O.I)% 3.55 4.75 6.49 3.4 Molab 

NDA mean 3.577 4.834 6.719 3.892 


Quality assurance analyses for THC and PAH 

Table1.3-1 Quality assurance analyses for THC 

THC mg/kg Comments 

In house standards 

THC Oseberg 86 ± 20 n = 10, within the action limits in the control chart 

THC Oseberg Mini 5 ± 2 n = 7, within the action limits in the control chart 

Certified ref. material 

THC CRM CC-017 5600 ±1200 Certified value: 6600 ± 500 mg/kg 


Side 5 

Interlaboratory comparison 

SLP-SETOC SETOC median mg/kg Z-score 

SETOC 2010-2 #1 659 613 0.23 

#2 936 871 0.12 

#3 644 514 0.68 

#4 517 285 1.50 

Table1.3-2 Quality assurance analyses for PAH 

Interlaboratory comparison 

SLP-SETOC SETOC median mg/kg Z-score 

SETOC 2010-2 #1 11.68 10.30 0.39 

#2 79.29 84.29 -0.21 

#3 37.66 35.41 0.20 

#4 69.21 68.10 0.05 

Metals: 

In house standards (N1 and B1), certified reference material (LGC) and blank samples are 

included in the analyses. The results for the in house standards and the reference material are 

given in Table 1.3-3. The indicated intervals are given by two standard deviations of the 

measured means. The results are in good agreement with the reference value.

Table 1.3-3 Quality assurance analyses for metals (mg/kg dried sample) 

Element Ba Cd Cr Cu Hg Pb Zn 

Technic ICP GF-AAS ICP ICP CV-AAS ICP ICP 

N1 1) 

76 4 0.02 9.3 2.8 0.009 7.0 13 

Mean N1 761 ± 29 0.05 ± 0.06 9.1 ± 0.5 3.1 ± 0,4 0.008 ± 0.002 6.8 ± 0.5 13 ± 1 

81 0.05 22.9 8.3 0.018 9.4 29 

Mean B1 80±2 0.07±0.03 20.7±0.8 7.8±1 0.020±0.004 9.5±0.6 30±3 

B1 1) 

LGC 1) 

237 2.72 79.5 80.4 1.3 77.1 433 

Cert. LGC - 

2.7±0.3 84.0±9.4 

1: The analyses are performed by ALS Laboratory Group 

2.0 Analytical results 

2.1 Sediment characterization 

Table2.1-1. Grain size distribution, Frigg 2010 

83.6±4.1 

1.4±0.1 


77.2±4.5 

439±26 

Station MDΦ Classification Silt & clay Sand Gravel SDΦ SkΦ KΦ 

FRI1 2.49 Fine sand 1.3 96.5 2.2 0.52 -0.16 1.38 

FRI2 2.54 Fine sand 1.0 99.0 0.0 0.48 -0.03 1.11 

FRI3 2.43 Fine sand 0.9 98.7 0.4 0.44 -0.04 1.08 

FRIX2 2.35 Fine sand 2.0 98.0 0.0 0.44 0.09 1.10 

FRI4 2.49 Fine sand 0.9 98.3 0.9 0.42 -0.09 1.04 

FRIX1 2.44 Fine sand 2.2 97.8 0.0 0.42 -0.09 1.01 

FRI11 2.42 Fine sand 0.5 99.5 0.0 0.46 -0.05 1.14 

FRI24 2.43 Fine sand 1.4 98.4 0.1 0.47 -0.03 1.12 

FRI25 2.36 Fine sand 1.7 93.4 4.9 0.95 -0.41 2.42 

FRI27 2.49 Fine sand 1.4 98.6 0.0 0.42 0.01 1.01 

FRI10R 2.84 Fine sand 6.0 94.0 0.0 0.88 0.05 1.33 

MDΦ: Median diameter, SDΦ; Standarddeviation, SkΦ: Skewness, KΦ: Kurtosis 

Side 6


Side 7 

Table 2.1-2. Weightfaction and kumulative weight (KV), Frigg 2010 

FRI1 FRI11 

Diameter Ф Weight Weight KV Diameter Ф Weight Weight KV 

(µm) (g) (%) (%) (µm) (g) (%) (%) 

2000 -1 0.37 2.2 2.2 2000 -1 0.00 0.0 0.0 

1000 0 0.06 0.4 2.6 1000 0 0.08 0.6 0.6 

500 1 0.30 1.8 4.4 500 1 0.28 2.1 2.7 

355 1.5 0.30 1.8 6.2 355 1.5 0.35 2.6 5.4 

250 2 0.88 5.3 11.5 250 2 1.04 7.8 13.2 

180 2.5 6.54 39.3 50.8 180 2.5 5.84 44.0 57.2 

125 3 7.03 42.2 93.0 125 3 4.90 36.9 94.1 

90 3.5 0.70 4.2 97.2 90 3.5 0.50 3.8 97.9 

63 4 0.25 1.5 98.7 63 4 0.21 1.6 99.5 


Side 8 

FRIX2 FRI27 

Diameter Ф Weight Weight KV Diameter Ф Weight Weight KV 

(µm) (g) (%) (%) (µm) (g) (%) (%) 

2000 -1 0.00 0.0 0.0 2000 -1 0.00 0.0 0.0 

1000 0 0.00 0.0 0.0 1000 0 0.02 0.2 0.2 

500 1 0.05 0.5 0.5 500 1 0.07 0.6 0.7 

355 1.5 0.19 2.0 2.6 355 1.5 0.12 1.0 1.7 

250 2 1.22 13.0 15.6 250 2 0.72 6.0 7.7 

180 2.5 4.58 48.9 64.5 180 2.5 5.26 43.6 51.3 

125 3 2.78 29.7 94.2 125 3 5.07 42.0 93.3 

90 3.5 0.24 2.6 96.8 90 3.5 0.50 4.1 97.4 

63 4 0.12 1.3 98.0 63 4 0.14 1.2 98.6 

Table2.1-3. Total organic matter (TOM), Frigg 2010. 

Station ° / m TOM (%) 

FRI1 0.63 

FRI2 0.47 

FRI3 0.55 

FRIX2 0.76 

FRI4 0.67 

FRIX1 0.65 

FRI11 0.69 

FRI24 0.45 

FRI25 0.54 

FRI27 0.52 

FRI10R 0.93 


Table2.2-1. Total hydrocarbons in sediments (THC),(mg/kg dry sediment), Frigg 2010 

Station ° / m Layer Grab#1 Grab#2 Grab#3 Average Stdev 

FRI1 0-1 cm 10.0 7.5 6.6 8.0 1.7 

FRI2 0-1 cm 2.5 2.2 8.4 4.3 3.5 

FRI3 0-1 cm 8.1 7.7 12.8 9.5 2.8 

FRI3 1-3 cm 14.6 

FRI3 3-6 cm 10.7 

FRIX2 0-1 cm 7.6 6.7 3.5 5.9 2.2 

FRI4 0-1 cm 5.9 6.2 5.6 5.9 0.3 

FRIX1 0-1 cm 11.1 9.4 13.3 11.3 1.9 

FRI11 0-1 cm 8.3 12.1 5.5 8.6 3.3 

FRI24 0-1 cm 4.4 5.0 3.6 4.3 0.7 

FRI25 0-1 cm 8.7 7.0 16.4 10.7 5.0 

FRI27 0-1 cm 2.6 8.0 2.7 4.4 3.1 

FRI10R 0-1 cm 4.2 3.7 3.9 4.0 0.3 

FRI10R 1-3 cm 4.4 

FRI10R 3-6 cm 3.8 


Side 9


Side 10 

Table 2.2-2. Sum PAH and NPD (mg/kg dry sediment), Frigg 2010 

Station ° / m Layer Grab#1 Grab#2 Grab#3 Average Stdev 

PAH 

FRI3 0-1 cm 0.208 0.074 0.144 0.142 0.067 

FRI3 1-3 cm 4.238 

FRI3 3-6 cm 0.182 

FRI10R 0-1 cm 0.046 0.041 0.048 0.045 0.003 

FRI10R 1-3 cm 0.048 

FRI10R 3-6 cm 0.064 

NPD 

FRI3 0-1 cm 0.10 0.06 0.07 0.08 0.02 

FRI3 1-3 cm 1.80 

FRI3 3-6 cm 0.09 

FRI10R 0-1 cm 0.01 0.01 0.02 0.01 0.00 

FRI10R 1-3 cm 0.01 

FRI10R 3-6 cm 0.02

Table 2.2-3. Individual distribution of PAH and NPD (µg/kg dry sediment) Frigg 2010 

Station FRI3 

Grab #1 #2 #3 #2 #2 

Layer (cm) 0-1 0-1 0-1 1-3 3-6 

PAH (µg/kg) 

Naftalene 1 1 2 8 < 1 

Acenaftylen < 1 < 1 < 1 1 < 1 

Acenaften 4 3 7 56 1 

Fluoren 7 3 7 110 1 

Fenantren 29 13 13 621 7 

Antracen 14 2 3 479 3 

Fluoranten 43 13 26 886 29 

Pyren 27 9 18 669 24 

Benzantracen 14 3 11 366 21 

Krysen/trifenylen 14 5 10 284 18 

Benzo(b/j/k)fluoranten 23 10 20 383 34 

Benzo(a)pyren 12 4 11 216 19 

Dibenzantracen 1 < 1 1 20 2 

Indeno(1,2,3)pyren 9 4 8 69 11 

Benzo(ghi)perylen 9 4 8 72 12 

Sum PAH 208 74 144 4238 182 

NPD (µg/kg) 

Naftalene 1 1 2 8 < 1 

C1-Naphtalene 2 2 3 8 1 


C3-Naphtalene 10 19 23 47 28 

Fenantren 29 13 13 621 7 

Antracen 14 2 3 479 3 

C1-Fenantrene 12 7 6 247 11 

C2-Fenantrene 15 10 9 175 19 

C3-Fenantrene 6 3 3 60 9 

Dibenzoethiofen 2 1 1 52 1 

C1-Dibenzoethiofen 1 < 1 1 25 1 

C2-Dibenzoethiofen 4 1 2 30 4 

C3-Dibenzoethiofen 4 1 1 28 5 

Sum NPD 105 63 72 1798 92 


Side 11

Station FRI10R 

Grab #1 #2 #3 #1 #1 

Layer (cm) 0-1 0-1 0-1 1-3 3-6 

PAH (µg/kg) 

Naftalene < 1 < 1 < 1 < 1 < 1 

Acenaftylen < 1 < 1 < 1 < 1 < 1 

Acenaften < 1 < 1 < 1 < 1 < 1 

Fluoren < 1 < 1 < 1 < 1 < 1 

Fenantren 1 1 1 1 2 

Antracen < 1 < 1 < 1 < 1 < 1 

Fluoranten 2 2 2 2 3 

Pyren 2 1 1 1 2 

Benzantracen 1 1 1 1 1 

Krysen/trifenylen 2 2 2 2 3 

Benzo(b/j/k)fluoranten 13 12 13 13 17 

Benzo(a)pyren 2 2 2 2 3 

Dibenzantracen 1 1 1 1 2 

Indeno(1,2,3)pyren 9 8 10 10 14 

Benzo(ghi)perylen 11 10 12 12 16 

Sum PAH 46 41 48 48 64 

NPD (µg/kg) 

Naftalene < 1 < 1 < 1 < 1 < 1 




Fenantren 1 1 1 1 2 

Antracen < 1 < 1 < 1 < 1 < 1 




Dibenzoethiofen < 1 < 1 < 1 < 1 < 1 

C1-Dibenzoethiofen < 1 < 1 < 1 < 1 < 1 

C2-Dibenzoethiofen < 1 < 1 < 1 < 1 1 

C3-Dibenzoethiofen < 1 < 1 < 1 < 1 1 

Sum NPD 14 11 16 15 22 


Side 12

Table 2.2-4. Metals (mg/kg dry sediment), Frigg 2010. 

Stasjon °/m Prøve Ba Cd Cr Cu Hg Pb Zn 

FRI1 1 62 0,05 9.2 16.1 0.01 388 166 

2 105

3 54


Det Norske Veritas (DNV) is a leading, independent provider of services for managing risk with a global 

presence and a network of 300 offices in 100 different countries. DNV’s objective is to safeguard life, 

property and the environment. 

DNV assists its customers in managing risk by providing three categories of service: classification, 

certification and consultancy. Since establishment as an independent foundation in 1864, DNV has 

become an internationally recognised provider of technical and managerial consultancy services and 

one of the world’s leading classification societies. This means continuously developing new 

approaches to health, safety, quality and environmental management, so businesses can run smoothly 

in a world full of surprises. 


Learn more on www.dnv.com

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