TABLE 7

RBP METRIC COMARISON

OYSTERVILLE CREEK

BERKS COUNTY

JUNE 10, 1999

METRIC

STATION

1OC

5OC

R1

1.

TAXA RICHNESS

26

23

22

Cand/Ref (%)

118

105

***

Biol. Cond. Score

6

6

6

2.

MOD. EPT INDEX

15

12

14

Cand/Ref (%)

107

86

***

Biol. Cond. Score

6

6

6

3.

MOD. HBI

2.48

3.73

2.54

Cand-Ref

-.06

1.19

***

Biol. Cond. Score

6

2

6

4.

% DOMINANT TAXA

22

16

19

Cand-Ref

3

-3

***

Biol. Cond. Score

6

6

6

5.

% MOD. MAYFLIES

37

34

34

Ref-Cand

-3

0

***

Biol. Cond. Score

6

6

6

TOTAL BIOLOGICAL
CONDITION SCORE

30

26

30

% COMPARABILITY
TO REFERENCE

100

87

***