FINAL REPORT
RECALCULATION OF SCREENING LEVEL CONCENTRATIONS
FOR NONPOLAR ORGANIC CONTAMINANTS IN MARINE SEDIMENTS
Prepared by
Jerry M. Neff, Jack Q. Word, and Thomas C. Gulbransen
December 1987
Prepared for
U.S. Environmental Protection Agency
Criteria and Standards Division
Office of Water Regulation and Standards
Washington, D.C.
Submitted by
BATTELLE
Washington Environmental Program Office
2030 M Street, N.W.
Washington, D.C.
-------
INTRODUCTION
In Work Assignment 56, Task IV, Battelle evaluated the
screening level concentration (SLC) approach to developing
sediment quality criteria for nonpolar organic contaminants in
freshwater and marine sediments. The results of that effort
were summarized in a final report titled, Sediment Quality
Criteria Methodology Validation: Calculation of Screening Level
Concentrations from Field Data. The report was submitted to EPA
in July 1986. In that report, Battelle identified a lack of
standardization of taxonomic nomenclature and identifications of
benthic infauna among the several large field databases used for
calculating marine SLCs. Therefore, it was decided to review
the marine databases to identify synonymies and inappropriate
taxonomic distinctions, and to eliminate data sets in which the
taxonomy was suspected of being inaccurate. This work was
performed as a task in Work Assignment 77.
The objectives of this task were to
o Edit the database used to calculate SLC
values for marine sediments
o Remove any questionable data sets from the
SLC database
o Based on the revised data base, recalculate
SLCs for selected nonpolar organic
contaminants in marine sediments.
MATERIALS AND METHODS
The species lists from the data sets for southern
California and Puget Sound were reviewed. Species names that
were synonymous were combined. In addition, the reasonableness
and rigor of the overall taxonomic identifications were reviewed
on the basis of knowledge of the taxonomy of the benthic fauna
of the study areas. Inappropriate taxonomic distinctions were
identified and corrected.
-------
Any suspect species lists were noted and the data sets
containing them were eliminated from the database. Species that
were identified as synonymous were combined, inappropriate
taxonomic distinctions were corrected, and this information was
entered into the database. In addition, the two southern
California data sets were reviewed and all species that occurred
in both data sets were combined if the resulting combination
produced the minimum of 20 observations required for calculating
a species screening level concentration (SSLC).
The revised database was then used to calculate SSLCs,
SLCs, and the 95 percent confidence intervals for the SLCs for
12 nonpolar organic contaminants in marine sediments. The
methods used were those described in detail in the 1986 final
report (Neff et al., 1986). The compounds were total DDT, total
polychlorinated biphenyls (PCBs), and 10 polycyclic aromatic
hydrocarbons (acenaphthalene, naphthalene, fluorene,
phenanthrene, anthracene, -fluoranthene, benz(a)anthracene,
chrysene, pyrene, and benzo(a)pyrene).
RESULTS
Several synonymies or inappropriate taxonomic distinctions
were identified in the data sets. The corrected species were
combined under the currently accepted taxonomic designation. The
following synonymies or inappropriate taxonomic distinctions
were identified and corrected:
o Ampharete. arctica, A. goesi, A. labrops, A.
acutifrons
o Goniada brunnea, G. maculata
o Mediomastus ambiseta, M. spp., M.
californierisis
o Prionospio cirriferra, Minuspio cirriferra.
-------
Serious technical problems were identified in the taxonomy
of the Puget Sound "Eight Bay Study." Therefore, this data set
was deleted from the database. This resulted in loss of some
data for 20 species and loss of some SSLC values for all
contaminants except DDT, pyrene, and benzo(a)pyrene.
By combining species that were present in the two southern
California data sets, it was possible to calculate SSLC values
for five additional species. These SSLCs then were added to
those already in the database and were used in the recalculation
of SLCs.
The SLC values derived from the revised database are
summarized in Table 1. The SSLC values and resulting frequency
distribution curves are presented in Attachments 1 through 12.
In all but one case, the SLC values calculated with the revised
database were higher than the values calculated with the old
database.fThe exception was P.CBs. The SLC value for PCBs
;* +£'
dropped slightly from 4.26 tor 3.66 j/g/g organic carbon'. None of
the changes should be considered statistically significant,
given the relatively large 95 percent confidence intervals for
most values.
Revision of the database allowed us to calculate SLCs for
three compounds for which SLCs were not calculated as part of
the original work assignment. These were acenaphthalene,
fluorene, and anthracene. SLCs for these compounds were in the
range of 4.74 to 16.3 vg/g organic carbon.
DISCUSSION
Quality control review of the data sets used to calculate
SLCs resulted in the combination of several entries for
synonymous or misidentified species in the species lists,
addition of species occurrences for species that occurred in two
data sets, and elimination of one questionable data set. These
changes in the database resulted in small changes in the
calculated SLC values for several nonpolar organic contaminants
-------
TABLE 1. OLD AND RECALCULATED SCREENING LEVEL CONCENTRATIONS FOR
NONPOLAR ORGANIC COMPOUNDS IN MARINE SEDIMENTS (ALL VALUES
ARE pg/g ORGANIC CARBON)
Compound
DDT
PCB
Acenaphthalene
Naphthalene
Fluorene
Phenanthrene
Anthracene
Fluoranthene
Benz( a) anthracene
Chrysene
Pyrene
Benzol a)pyrene
Screening
Old Value
42.8
4.26
—
36.7
—
25.9
—
43.2
26.1
38.4
43.4
39.6
Level Concentration
New value
50.5
3.66
4.74
41.4
10.1
36.8
16.3
64.4
26.1
38.4
66.5
39.7
-------
in marine sediments. There was no change for three compounds, a
decrease in the SLC for one compound, and an increase in the SLC
for five compounds. None of the changes were sufficiently large
that the new value was outside the 95 percent confidence
interval for the old value. Therefore, the differences were
considered statistically insignificant. The largest change was
an approximately 50 percent increase in the SLC for pyrene from
43.4 to 66.5 j/g/g organic carbon. Most of the changes were
between 10 and 15 percent.
These results indicate that the SLC approach is not
particularly sensitive to minor changes in the database from
which SLCs are calculated. As the number of observations
»
increases and the number of SSLCs used to calculate SLCs grows,
the sensitivity of the calculated SLC values to small changes in
the database will decrease further.
These results confirm that the SLC approach to sediment
criteria development or validation has basic technical validity.
Its strengths include the use of real field data on the
cooccurence of contaminants and infaunal animals in sediments
and the lack of any a priori assumptions about the relationship
between the distribution of benthic fauna and the concentrations
of contaminants in sediments. These attributes of the SLC
approach make it an ideal candidate for a method to validate
sediment quality criteria developed by more theoretical
approaches, such as equilibrium partitioning.
The SLC approach should be further developed to improve the
statistical rigor of the SLC calculation process and the
technical validity of the SLC values generated. Several
variations of different aspects of the method for calculating
the SLC should be tried and evaluated by sensitivity analysis.
As many additional data sets as possible should be added to the
database. A large number of additional data sets have been
identified and it may be possible to increase the number of
stations in the database to about 1000. All data sets should be
subjected to rigorous quality assurance review. Entry of the
-------
complete database into a sophisticated computer database
management system will facilitate combination of species lists
from different data sets, entry of new data sets as they become
available, and performance of sensitivity and statistical
analyses on the SLC calculation method and the resulting SLC
values.
It is essential that EPA has an independent method to
validate the EP approach or other approach for derivation of
sediment quality criteria. The SLC approach is the ideal one
for that purpose.
LITERATURE CITED
Neff, J.M., O.J. Bean, B.W. Cornaby, R.M. Vaga, T.C. Gulbransen,
and J.A. Scanlon. 1986. Sediment Quality Criteria
Methodology Validation: Calculation of Screening Level
Concentrations from Field Data. Report to U.S.
Environmental Protection Agency, Criteria and Standards
Division, Office of Water Regulation and Standards,
Washington D.C. 60 pp.
-------
ACENAPHTHALENE
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
SLC =
Cumulative
Freq. U)
4.8
9.5
14.3
19.0
23.8
28.6
33.3
38.1
42.9
47.6
52.4
57.1
61.9
66.7
71.4
76.2
81.0
85.7
90.5
95.2
100.0
4.739 ug/gTOC
SSLC
(ug/g Org.C)
4.706
5.479
5.714
5.714
6.522
6.522
6.522
7.190
7.190
7.190
7.190
7.190
7.391
7.391
7.391
9.286
9.286
13.861
13.861
13.861
15.702
[0.0 -
No. of
Obser .
24
25
21
28
23
41
49
33
53
24
51
25
47
47
49
28
28
26
27
25
. 20
Organism
COMPSOMYAX SUBDIAPHANA
PRAXILLELLA GRACILIS
PECTINARIA CALIFORNIENSIS
AMPHIODIA (AMPHISPINA) URTICA
EUCHONE INCOLOR
CAPITELLA CAPITATA
AXINOPSIDA SERICATA
NEPHTYS CORNUTA FRANCISCANA
HACOMA CARLOTTENSIS
GONIAOA BRUNNEA
EUPHILOMEDES CARCHARODONTA
ARMANDIA BREVIS
PRIONOSPIO STEENSTRUPI
NEPHTYS FERRUGINEA
GLYCERA CAPITATA
PLATYNEREIS BICANALICULATA
GLYCERA AMERICANA
SPIOCHAETOPTERUS COSTARUM
PHOLOE MINUTA
PARVILUCINA- TENUISCULPTA
SPIOPHANES BERKELEYORUM
(ug/gTOd
14.0 +
10.5 +
7.0 +
3.5+
+-
0
ACENAPHTHALENE vs. CUMULATIVE FREQUENCY
* * *
* * *
• - + -
20
* * *
* * *
* * * * *
60 80
Cumulative Frequency
—+
100
Attachment 1
-------
ANTHRACENE
SLC = 16.316 ug/gTOC [0.0
Cumulative SSLC No. of
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Freq. ( ', )
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
(ug/g Org.C)
15.953
18.235
19.130
19.595
19.595
19.595
20.000
20.000
20.183
20.183
20.183
21.739
21.739
21.739
21.739
23.288
23.288
23.288
27.273
27.273
27.273
27.273
42.353
Obser.
25
23
20
20
35
25
21
52
26
53
43
25
50
56
52
50
21
30
26
30
27
29
30
- 19.596) a-0.026
Organism
ARMANDIA BREVIS
EUCHONE INCOLOR
PRIONOSPIO CIRRIFERA
PHYLLODOCE HARTMANAE
NEPHTYS CORNUTA FRANCISCANA
COMPSOMYAX SUBDIAPHANA
SPIOPHANES BERKELEYORUM
AXINOPSIDA SERICATA
GONIAOA BRUNNEA
EUPHILOMEDES CARCHARODONTA
CAPITELLA CAPITATA
PRAXILLELLA GRACILIS
NEPHTYS FERRUGINEA
HACOMA CARLOTTENSIS
GLYCERA CAPITATA
PRIONOSPIO STEENSTRUPI
PECTINARIA CALIFORNIENSIS
GLYCERA AMERICANA
SPIOCHAETOPTERUS COSTARUM
PHOLOE MINUTA
PARVILUCINA TENUISCULPTA
AMPHIODIA (AMPHISPINA) URTICP
PLATYNEREIS BICANALICULATA
(ug/gTOC)
40.0 +
32.0 +
24.0 +
ANTHRACENE vs. CUMULATIVE FREQUENCY
* * * *
16.0+ *
I
* * * *
* * *
* * * *
* * * * *
20
40 60 80
Cumulative Frequency
100
Attachment 2
-------
BENZ(A)ANTHRACENE
SLC = 26.119 ug/gTOC (0.0 - 40
Cumulative
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21-
22
23
Freq. ( °, )
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
SSLC
(ug/g Org.C)
24.348
35.477
35.477
40.952
41.322
42.466
44.118
44.118
44.118
44.118
44.118
44.118
47.647
47.647
47.647
47.647
47.647
47.647
47.945
51.765
51.765
51.802
51.802
No. of
Obser. 0
20 PR
21 SP
25 AR
26 GO
26 SP
52 AX
56 MA
52 GL
53 EU
28 EU
25 CO
49 CA
57 PF
25 PF
21 PE
27 P*
50 NE
35 NE
29 A*
38 PE
30 GI
30 PI
20 PF
a=0.026
Organism
PRIONOSPIO CIRRIFERA
SPIOPHANES BERKELEYORUM
ARMANDIA BREVIS
GONIADA BRUNNEA
SPIOCHAETOPTERUS COSTARUM
AXINOPSIDA SERICATA
MACOMA CARLOTTENSIS
GLYCERA CAPITATA
EUPHILOMEDES CARCHARODONTA
EUCHONE INCOLOR
COMPSOMYAX SUBDIAPHANA
CAPITELLA CAPITATA
PRIONOSPIO STEENSTRUPI
PRAXILLELLA GRACILIS
PECTINARIA CALIFORNIENSIS
PARVILUCINA TENUISCULPTA
NEPHTYS FERRUGINEA
NEPHTYS CORNUTA FRANCISCANA
AMPHIODIA (AMPHISPINA) URTICA
PHOLOE MINUTA
GLYCERA AMERICANA
PLATYNEREIS BICANALICULATA
PHYLLODOCE HARTMANAE
(ug/gTOC)
48.0 +
40.0 +
32.0 +
24.0 +
+ -
0
BENZ(A)ANTHRACENE vs. CUMULATIVE FREQUENCY
* *
* * * *
* * *****
* * * * * *
20
40 60 80
Cumulative Frequency
—+
100
Attachment 3
-------
BENZO(A)PYRENE
SLC =
Cumulative
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Freq. ( \)
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
55.2
59.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
39.667 ug/gTOC [0.0 -
SSLC Mo. of
(ug/g Org.C)
39.604
40.000
46.552
46.795
49.315
49.315
50.000
50.000
50.000
50.000
50.000
50.588
52.910
52.910
52.910
55.372
55.372
55.372
55.372
61.644
61^.644
66\667
137.387
Obser .
21
20
49
26
25
28
25
51
52
25
51
34
56
55
25
37
21
26
49
29
29
29
20
Organism
SPIOPHANES BERKELEYORUM
PRIONOSPIO CIRRIFERA
CAPITELLA CAPITATA
SPIOCHAETOPTERUS COSTARUM
GONIADA BRUNNEA
EUCHONE INCOLOR
PRAXILLELLA GRACILIS
GLYCERA CAPITATA
EUPHILOMEDES CARCHARODONTA
COMPSOMYAX SUBDIAPHANA
AXINOPSIDA SERICATA
NEPHTYS CORNUTA FRANCISCANA
PRIONOSPIO STEENSTRUPI
HACOMA CARL-Q.TTENSIS
ARMANDIA B&ELVIS
PHOLOE MINU^A
PECTINARIA CALIFORNIENSIS
PARVILUCINA TENUISCULPTA
NEPHTYS FERRUGINEA
GLYCERA AMERICANA
AMPHIODt^(AMPHISPINA) URTICA
PLATYNERE>IS BICANALICULATA
PHYLLODOCE HARTMANAE
(ug/gTOC)
120 +
90 +
60 +
BENZO(A)PYRENE vs. CUMULATIVE FREQUENCY
* *
****** ****
1 * *
1
30 +
0
20
'10
60
80
10
Cumulative Frequency
Attachment 4
-------
CHRYSENE
SLC = 38.395 ug/gTOC [0.0 - 60.847) a=*0.026
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Cumulative
Freq. Co)
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
SSLC
(ug/g Org.C)
35.652
52.893
57.143
60.847
62.084
62.084
62.084
63.694
63.694
64.706
64.706
64.706
68.966
68.966
69.863
69.863
75.314
75.314
76.471
76.471
76.471
76.471
76.471
No. of
Obser .
20
21
26
25
20
48
51
57
28
50
55
52
25
51
25
21
35
25
30
38
26
29
29
Organism
PRIONOSPIO CIRRIFERA
SPIOPHANES BERKELEYORUH
GONIADA BRUNNEA
ARMANDIA BREVIS
PHYLLODOCE HARTMANAE
CAPITELLA CAPITATA
AXINOPSIDA SERICATA
PRIONOSPIO STEENSTRUPI
EUCHONE INCOLOR
NEPHTYS FERRUGINEA
MACOMA CARLOTTENSIS
EUPHILOHEDES CARCHARODONTA
SPIOCHAETOPTERUS COSTARUM
GLYCERA CAPITATA
PRAXILLELLA GRACILIS
PECTINARIA CALIFORNIENSIS
NEPHTYS CORNUTA FRANCISCANA
COMPSOMYAX SUBDIAPHANA
PLATYNEREIS BICANALICULATA
PHOLOE MINUTA
PARVILUCINA TENUISCULPTA
GLYCERA AMERICANA
AMPHIODIA (AMPHISPINA) URTICA
(ug/gTOC)
72 +
60 +
48 +
36 +
I
+•
0
CHRYSENE vs. CUMULATIVE FREQUENCY
* * * * *
* *
* * * *
* * * * *
* * *
20
40 60 80
Cumulative Frequency
100
Attachment 5
-------
DDT
SLC = 50.488 ug/gTOC [0.0 - 113.684) a=0.02
Cumulative SSLC
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Freq. (\)
4.8
9.5
14.3
19.0
23.8
28.6
33.3
38.1
42.9
47.6
52.4
57.1
61.9
66.7
71.4
76.2
81.0
85.7
90.5
95.2
100.0
(ug/g Org.C)
50.488
50.438
68.696
113.684
137.692
137.692
202.441
207.917
222.389
954.033
1136.319
1146.004
1186.331
1260.058
1392.128
1407.287
1511.990
1816.188
1999.961
2069.586
2069.586
No. of
Obser .
21
27
29
21
20
29
25
20
22
62
44
22
79
45
86
61
101
51
44
37
57
Organism
AMPELISCA BREVISIMULATA
AMPHIODIA (AMPHISPINA) URTICA
EUPHILOMEDES CARCHARODONTA
HETEROPHOXUS OCULATUS
STHENELANELLA UNIFORMIS
COMPSOMYAX SUBDIAPHANA
GONIADA BRUNNEA
CHLOEIA PINNATA
GNATHIA CRENULATIFRONS
PECTINARIA CALIFORNIENSIS
MEDIOMASTUS AMBISETA
PRIONOSPIO CIRRIFERA
AXINOPSIDA SERICATA
PARAPRIONOSPIO PINNATA
GLYCERA CAPITATA
PRIONOSPIO STEENSTRUPI
PARVILUCINA TENUISCULPTA
MACOMA CARLOTTENSIS
CAPITELLA CAPITATA
SPIOPHANES BERKELEYORUM
TELLINA CARPENTERI
(ug/gTOC)
1800 +
1200 +
600 +
0+ * *
+•
0
DDT vs. CUMULATIVE FREQUENCY
* * *
* * * *
* * *
20
40 60 80
Cumulative Frequency
100
Attachment 6
-------
FLUORENE
SLC = 10.123 ug/gTOC [0.0
Cumulative SSLC No. of
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Freq. ( 1 )
4.8
9.5
14.3
19.0
23.8
28.6
33.3
38.1
42.9
47.6
52.4
57.1
61.9
66.7
Tl.4
<&g.2
81.0
85.7
90.5
95.2
100.0
( ug/g Org.C)
10.092
10.811
12.353
13.223
13.223
13.223
13.223
13.366
13.366
13.366
13.366
13.366
13.529
13.529
13.529
13.529
13.529
18.824
18.824
18.824
18.824
Obser .
24
24
49
21
53
51
42
20
26
49
47
23
25
25
33
49
24
27
28
28
28
- 13.233) a=0.02
Organism
GONIADA BRUNNEA
ARMANDIA BREVIS
AXINOPSIDA SERICATA
PECTINARIA CALIFORNIENSIS
MACOMA CARLOTTENSIS
EUPHILOMEDES CARCHARODONTA
CAPITELLA CAPITATA
SPIOPHANES BERKELEYORUM
SPIOCHAETOPTERUS COSTARUM
PRIONOSPIO STEENSTRUPI
NEPHTYS FERRUGINEA
EUCHONE INCOLOR
PRAXILLELLA GRACILIS
PARVILUCINA TENUISCULPTA
NEPHTYS CORNUTA FRANCISCANA
GLYCERA CAPITATA
COMPSOMYAX SUBDIAPHANA
PLATYNEREIS BICANALICULATA
PHOLOE MINUTA
GLYCERA AMERICANA
AMPHIODIA (AMPHISPINA) URTICA
(ug/gTOC-)
17.5 +
15.0 +
12.5 +
10.0+
FLUORENE vs. CUMULATIVE FREQUENCY
* * *
* * * *
* * * * * * * * *
20
40 60 80
Cumulative Frequency
—+
100
Attachment 7
-------
FLUORANTHENE
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
SLC =
Cumulative
Freq. CO
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
64.434 ug/gTOC [0.0 -
SSLC
(ug/g Org.C)
64.286
65.217
66.138
81.081
81.651
81.651
111.765
111.765
124.658
124.658
124.658
124.658
124.658
129.412
129.412
129.412
135.294
135.294
135.294
135.294
146.552
164.384
164.384
No. of
Obser .
22
20
25
20
26
27
48
52
58
51
55
53
28
36
52
25
25
39
21
27
31
29
29
Organism
SPIOPHANES BERKELEYORUH
PRIONOSPIO CIRRIFERA
ARMANDIA BREVIS
PHYLLODOCE HARTMANAE
SPIOCHAETOPTERUS COSTARUM
GONIADA BRUNNEA
CAPITELLA CAPITATA
AXINOPSIDA SERICATA
PRIONOSPIO STEENSTRUPI
NEPHTYS FERRUGINEA
MACOMA CARLOTTENSIS
EUPHILOMEDES CARCHARODONTA
EUCHONE INCOLOR
NEPHTYS CORNUTA FRANCISCANA
GLYCERA CAPITATA
COMPSOMYAX SUBDIAPHANA
PRAXILLELLA GRACILIS
PHOLOE MINUTA
PECTINARIA CALIFORNIENSIS
PARVILUCINA TENUISCULPTA
PLATYNEREIS BICANALICULATA
GLYCERA AMERICANA
AMPHIODIA (AMPHISPINA) URTIC<
(ug/gTOC)
150+
120 +
90 +
60 +
+•
0
* *
FLUORANTHENE vs. CUMULATIVE FREQUENCY
* * * *
* * *
*****
* *
* * *
20
40 60 80
Cumulative Frequency
—+
100
Attachment 8
-------
NAPHTHALENE
SLC = 41.394 ug/gTOC [0.0 -
Cumulative SSLC No. of
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Freq. ( ", )
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
(ug/g Org.C)
41.394
41.394
41.394
41.765
41.765
41.765
43.333
43.333
47.436
47.436
47.436
51.980
51.980
51.980
51.980
51.980
51.980
52.055
52.055
52.055
57.059
57.059
57.059
Obser .
20
43
25
24
22
51
25
24
55
51
52
21
26
50
20
49
34
30
21
29
29
27
28
Organism
PRIONOSPIO CIRRIFERA
CAPITELLA CAPITATA
ARMANDIA BREVIS
PRAXZLLELLA GRACILIS
EUCHONE INCOLOR
AXINOPSIDA SERICATA
GONIADA BRUNNEA
COMPSOMYAX SUBDIAPHANA
MACOMA CARLOTTENSIS
GLYCERA CAPITATA
EUPHILOMEDES CARCHARODONTA
SPIOPHANES BERKELEYORUM
SPIOCHAETOPTERUS COSTARUM
PRIONOSPIO STEENSTRUPI
PHYLLODOCE HARTMANAE
NEPHTYS FERRUGINEA
NEPHTYS CORNUTA FRANCISCANA
PLATYNEREIS BICANALICULATA
PECTINARIA CALIFORNIENSIS
GLYCERA AMERICANA
PHOLOE MINUTA
PARVILUCINA TENUISCULPTA
AMPHIODIA (AMPHISPINA) URTICA
(ug/gTOC:
55.0 +
50.0 +
45.0 +
40.0 +
NAPHTHALENE vs. CUMULATIVE FREQUENCY
* •*
* * *
* * *
* * *
20
._ + H + .
40 60 80
Cumulative Frequency
100
Attachment 9
-------
PCS
SLC = 3.656 ug/gTOC [0.0 - 4.583) a=0.03
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
Cumulative
Freq. ( ", )
2.0
3.9
5.9
7.8
9.8
11.8
13.7
15.7
17.6
19.6
21.6
23.5
25.5
27.5
29.4
31.4
33.3
35.3
37.3
39.2
41.2
43.1
45.1
47.1
49.0
51.0
52.9
54.9
56.9
58.8
60.8
62.7
64.7
66.7
68.6
70.6
72.5
74.5
76.5
78.4
80.4
82.4
84.3
86.3
88.2
90.2
92.2
94.1
96.1
98.0
100.0
SSLC
(ug/g Org.C)
2.222
3.394
3.871
4.583
4.634
4.714
4.714
4.841
4.841
4.841
4.841
4.841
6.000
6.000
6.000
6.000
7.500
8.000
8.000
8.000
8.000
8.854
10.000
10.000
10.000
10.625
10.625
10.941
11.417
11.731
13.769
16.935
25.000
30.118
33.103
33.905
33.905
34.194
39.683
40.017
41.143
41.143
46.025
46.307
47.817
47.911
49.547
52.058
56.307
58.774
71.315
Mo. of
Obser .
21
21
32
24
22
24
27
30
29
27
20
26
33
23
23
51
33
39
24
22
24
25
27
33
26
29
30
32
24
37
25
55
36
21
35
20
20
54
20
56
28
109
90
20
50
95
64
67
89
42
40
Organism
SCALIBREGMA INFLATUM
SPIOCHAETOPTERUS COSTARUM
NEPHTYS FERRUGINEA
HARMOTHOE EXTENUATA
EUCHONE ELEGANS
DRILONEREIS LONGA
SPIOPHANES BOMBYX
EUCHONE INCOLOR
ANOBOTHRUS GRACILIS
ARCTICA ISLANDICA
PARAONIS GRACILIS
NINOE NIGRIPES
NUCULA PROXIMA
COSSURO LONGOCIRRATA
NEPHTYS INCISA
PHOLOE MINUTA
THARYX ACUTUS
ARICIDEA CATHERINAE
UNCIOLA IRRORATA
CAULLERIELLA CF KILLARIENSIS
GONIADELLA GRACILIS
LUMBRINEREIS HEBES
PHERUSA AFFINIS
THARYX ANNULOSUS
PHYLLODOCE HUCOSA
PITAR MORRHUANUS
LUMBRINEREIS ACICULARUM
TELLINA AGILIS
GLYCERA DIBRANCHIATA
AMPHIODIA (AMPHISPINA) URTICA
HETEROPHOXUS OCULATUS
EUPHILOMEDES CARCHARODONTA
GONIADA BRUNNEA
AMPELISCA BREVISIMULATA
COMPSOMYAX SUBDIAPHANA
AMPHARETE ARCTICA
STHENELANELLA UNIFORMIS
MEDIOMASTUS AMBISETA
ARMANDIA BREVIS
PECTINARIA CALIFORNIENSIS
PRIONOSPIO CIRRIFERA
PRIONOSPIO STEENSTRUPI
AXINOPSIDA SERICATA
CHLOEIA PINNATA
PARAPRIONOSPIO PINNATA
GLYCERA CAPITATA
CAPITELLA CAPITATA
ilACOMA CARLOTTENSIS
PARVILUCINA TENUISCULPTA
SPIOPHANES BERKELEYORUM
TELLINA CARPENTERI
-------
PCB vs. CUHMIATTVE FREQUENCY
(ug/gTOC)
60 +
I
I
I
I
40 +
*****
* ** *
* * * *
20 +
**********
************
0 +
20
40 60 80
Cumulative Frequency
100
Attachment 10 (cont.)
-------
PHENANTHRENE
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
SLC =
Cumulative
Freq. ( °; )
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
36.775 ug/gTOC [0.0 -
SSLC
(ug/g Org.C)
36.576
37.826
38.356
38.514
39.726
39.726
40.588
40.588
40.588
40.588
40.588
52.294
52.294
52.294
52.294
54.167
55.372
55.372
55.372
75.000
75.000
75.000
75.000
No. of
Obser .
25
20
25
20
27
52
25
51
36
53
25
21
55
52
46
54
22
35
29
26
31
27
29
Organism
ARMANDIA BREVIS
PRIONOSPIO CIRRIFERA
EUCHONE INCOLOR
PHYLLODOCE HARTMANAE
GONIADA BRUNNEA
AXINOPSIDA SERICATA
PRAXILLELLA GRACILIS
NEPHTYS FERRUGINEA
NEPHTYS CORNUTA FRANCISCANA
EUPHILOMEDES CARCHARODONTA
COMPSOMYAX SUBDIAPHANA
PECTINARIA CALIFORNIENSIS
MACOMA CARLOTTENSIS
GLYCERA CAPITATA
CAPITELLA CAPITATA
PRIONOSPIO STEENSTRUPI
SPIOPHANES BERKELEYORUM
PHOLOE MINUTA
AMPHIODIA (AMPHISPINA) URTICA
SPIOCHAETOPTERUS COSTARUM
PLATYNEREIS BICANALICULATA
PARVILUCINA TENUISCULPTA
GLYCERA AMERICANA
PHENANTHRENE vs. CUMULATIVE FREQUENCY
( ug/gTOC ) |
1
72 +
1
1
1
1
60 +
1
1
1 * * *
1
48 +
1
1
1 ****•**•*
I * -v *
36 +
1
0 20 40 60
* * * *
* * * *
80 100
Cumulative Frequency
Attachment 11
-------
PYRENE
SLC = 66.482 ug/gTOC [0.0 - 75.00) a=0.026
Cumulative
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Frea. ( % )
4.3
8.7
13.0
17.4
21.7
26.1
30.4
34.8
39.1
43.5
47.8
52.2
56.5
60.9
65.2
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100.0
SSLC
(ug/g Org.C)
65.217
73.171
74.380
75.000
82.375
82.375
84.932
87.671
87.671
87.671
94.118
94.118
94.118
100.000
100.000
100.000
100.000
100.000
105.882
105.882
105.882
105.882
123.529
No. of
Obser .
20
25
22
27
26
20
52
51
55
53
58
52
48
25
21
36
28
25
31
27
29
29
39
Organism
PRIONOSPIO CIRRIFERA
ARMANDIA BREVIS
SPIOPHANES BERKELEYORUM
GONIAOA BRUNNEA
SPIOCHAETOPTERUS COSTARUM
PHYLLODOCE HARTMANAE
AXINOPSIDA SERICATA
NEPHTYS FERRUGINEA
MACOMA CARLOTTENSIS
EUPHILOMEDES CARCHARODONTA
PRIONOSPIO STEENSTRUPI
GLYCERA CAPITATA
CAPITELLA CAPITATA
PRAXILLELLA GRACILIS
PECTINARIA CALIFORNIENSIS
MEPHTYS CORNUTA FRANCISCANA
EUCHONE INCOLOR
COMPSOMYAX SUBDIAPFANA
PLATYNEREIS BICANALICULATA
PARVILUCINA TENUISCULPTA
GLYCERA AMERICANA
AMPHIODIA (AMPHISPINA) URTICA
PHOLOE MINUTA
(ug/gTOC)
120 +
100 +
80 +
60 +
I
PYRENE vs. CUMULATIVE FREQUENCY
* * *
* *
* * *
* *
* * * *
* * * * *
20
-j. + + .
••10 60 80
Cumulative Frequency
—+
100
Attachment 12
------- |