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Ref No. [UMCES[CBL 11-020
2
pressure. Midpoint sampling occurred at about 15 psid and endpoint sample collection occurred
just prior to 30 psid.
Water samples were analyzed for total suspended solids (TSS), particulate carbon (PC),
dissolved organic carbon (DOC), particle size distribution (PSD), phytoplankton (10 - 50 µm and
5 - 10 µm), and total bacteria. The filter developer provided pre weighed and numbered 0.4 µm
membrane filter pads for the TSS sample collection. Using a specialized filtration method,
samples were collected and analyzed for TSS collected after the 0.1-µm test filters and after the
10 µm and 5 µm pre filters.
Using standard IMO G8 testing approaches for organisms > 50
µm, s
amples of unfiltered,
ambient water were collected and analyzed for zooplankton communities
(see Appendix A for
results)
. This data provides insight on the zooplankton challenge conditions in ambient water.
General Test Parameters
1. Flow rate – consistent 10 gpm.
2. Trial duration – 5 hrs or until the pressure drop across the 0.1 µm filter reached 30 psid.
3. Trial volume – 3,000 gallons or total volume filtered before reaching 30 psid pressure drop at
the 0.1 µm filter.
4. MERC delivered 35-µm filtered challenge water to the test filter system.
Test filter skid composition for each trial
Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6
20 µm Pre Filter
X
X
X
X
10 µm Pre Filter
X
X
5 µm Pre Filter
X
X
0.1 µm Test Filter #1
X
X
X
0.1 µm Test Filter #5
X
X
X
4.0. Trial Results
4.1. Water Quality - Physical Parameters
The parameters below were measured in the challenge water using a YSI 556 multi-
parameter instrument.
For comments, see appendix A.
Trial Number
Date
Avg. Temp
(C°)
Avg. Salinity
Avg. DO
(mg/l)
Avg. pH
1
19-Jan-11
4.7
13.6
10.6
7.7
2
19-Jan-11
5.5
13.6
8.7
7.6
3
13-Jan-11
6.6
13.5
7.0
7.6
4
13-Jan-11
7.2
13.3
7.0
7.6
5
19-Jan-11
6.8
13.6
7.6
7.5
6
20-Jan-11
4.9
14.3
10.5
7.5