MERC ER01-14
5
Biological Efficacy
:
Water quality conditions and planktonic communities during this evaluation were typical
of fall in the upper Chesapeake Bay. Below (Table 2) is a summary of live organism
concentrations found in the challenge water (pre-filter) and treated (post-filter) samples. More
detailed datasets for each trial are provided in Sections 6 - 9.
Table 2. Summary of Live Organism Concentrations for all trials.
FXIT-30-AUG
≥50 µm
≥10 - <50 µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
66,782
3,383
1,260
62
Treated (post-filter)
62,517
1,216
947
161
FXIT-20-NTL
≥50 µm
≥10 - <50 µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
55,235
2,066
1,124
107
Treated (post-filter)
22,412
1,612
459
85
FXIT-20-AUG
≥50 µm
≥10 - <50 µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
53,984
2,361
1,864
292
Treated (post-filter)
24,823
2,174
1,185
121
FXIT-06-NTL
≥50 µm
≥10 - <50 µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
142,276
8,983
15,150
831
Treated (post-filter)
1,924
198
8,960
1,591
FXIT-06-AUG
≥50 µm
≥10 - <50 µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
102,869
4,500
9,097
967
Treated (post-filter)
300
55
3,273
290
FXIT-30.1-NTL
≥50 µm
≥10 - <50 µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
253,684
2,672
2,633
401
Treated (post-filter)
119,560
3,159
2,260
87
NTL = natural water
AUG = augmented water
FXIT-30-NTL
≥50
µm
≥10-<50
µm
Sample ID
Ave (#/m
3
)
SD
Ave (#/ml)
SD
Challenge (pre-filter)
32,243
3,356
1,517
150
Treated (post-filter)
32,909
1,053
1,190
61
