Table 3 Number of particles per replicate, grams of sediment analysed per replicate and at each site, particles per gram sediment in the three replicates and total amount of sediment sampled at the three sites

St. 1

16

26

19

90 g per replicate

(270 g per site)

0.18 MP/g

0.29 MP/g

0.21 MP/g

744.3 g

St. 2

34

30

59

90 g per replicate

(270 g per site)

0.38 MP/g

0.33 MP/g

0.66 MP/g

731.2 g

St. 3

87

40

29

90 g per replicate

(270 g per site)

0.97 MP/g

0.44 MP/g

0.32 MP/g

546.2 g