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Ref No. [UMCES[CBL 11-020
9
Trial # 1 –
Test Filter #1, 0.1 µm (no pre filters). 19 Jan 2011
(CW = challenge water)
Time Point
Total Phyto
10-50 µm (#/ml)
Total Phyto
5-10 µm (#/ml)
CW
Post 0.1 µm
CW
Post 0.1 µm
T-0 Initial
12,832
0
19,121
0
T-1 Mid
No sample
N/A
N/A
N/A
T-2 Final
12,241
0
19,212
0
No cells detected at either time point after the 0.1 µm filter.
Trial # 2 –
Test Filter #5, 0.1 µm (no pre filters).
19 Jan 2011
Time Point
Total Phyto
10-50 µm (#/ml)
Total Phyto
5-10 µm (#/ml)
CW
Post 0.1 µm
CW
Post 0.1 µm
T-0 Initial
15,839
0
22,762
2.5
T-1 Mid
No sample
N/A
N/A
N/A
T-2 Final
13,309
0
13,657
0.5
Cells after 0.1µm filtration were an unknown thin pennate diatom and some small chains of
S.
costata
Trial # 3 -
Pre filter 20 µm > Test Filter #1, 0.1 µm. 13 Jan 2011
Time Point
Total Phyto
10-50 µm (#/ml)
Total Phyto
5-10 µm (#/ml)
CW
Post 0.1 µm
CW
Post 0.1 µm
T-0 Initial
8,454
0
12,990
24
T-1 Mid
11,332
0
12,292
0
T-2 Final
7,931
0
9,287
0
Cells after 0.1µm filtration included
L.minimum.
Trial # 4 -
Pre filter 20 µm > Test Filter #5, 0.1 µm.
13 Jan 2011
Time Point
Total Phyto
10-50 µm (#/ml)
Total Phyto
5-10 µm (#/ml)
CW
Post 0.1 µm
CW
Post 0.1 µm
T-0 Initial
8,507
0
11,745
50
T-1 Mid
8,507
0
8,832
49
T-2 Final
8,825
0
13,506
178
The majority of cells after 0.1µm filtration were
H. rotundatum, with
a few
S. costata
cells and
unknown thin pennate diatoms.