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Table 4 Results obtained in scenario #2 according to Eq. 5 parameter variants. Cgam is the concentration measured in caged gammarids, slope is the slope of the regression between fish fillet and whole-body concentrations, and TLgam is the trophic level assigned to caged gammarids

From: Monitoring priority substances in biota under the Water Framework Directive: how effective is a tiered approach based on caged invertebrates? A proof-of-concept study targeting PFOS in French rivers

TMF

Cgam

Slope

TLgam

N Type I

N Type II

Correct

TMF50

1 campaign (Sep)

Lower bound

75th percentile

1

4

10

TMF50

1 campaign (Sep)

Median

75th percentile

0

5

10

TMF50

1 campaign (Sep)

Upper bound

75th percentile

0

6

9

TMF50

2 campaigns (June–Sep)

Lower bound

75th percentile

1

4

10

TMF50

2 campaigns (June–Sep)

Median

75th percentile

0

5

10

TMF50

2 campaigns (June–Sep)

Upper bound

75th percentile

0

5

10

TMF50

3 campaigns

Lower bound

75th percentile

0

4

11

TMF50

3 campaigns

Median

75th percentile

0

5

10

TMF50

3 campaigns

Upper bound

75th percentile

0

5

10

TMF75

1 campaign (Sep)

Lower bound

75th percentile

1

4

10

TMF75

1 campaign (Sep)

Median

75th percentile

1

4

10

TMF75

1 campaign (Sep)

Upper bound

75th percentile

0

4

11

TMF75

2 campaigns (June–Sep)

Lower bound

75th percentile

1

1

13

TMF75

2 campaigns (June–Sep)

Lower bound

Median

2

0

13

TMF75

2 campaigns (June–Sep)

Median

75th percentile

1

3

11

TMF75

2 campaigns (June–Sep)

Upper bound

75th percentile

0

5

10

TMF75

3 campaigns

Lower bound

75th percentile

1

1

13

TMF75

3 campaigns

Lower bound

Median

2

0

13

TMF75

3 campaigns

Median

75th percentile

0

3

12

TMF75

3 campaigns

Upper bound

75th percentile

0

5

10