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MERC ER01-12
12
Particulate Organic Carbon
(POC) content of challenge water during uptake. Ambient describes
natural conditions of water in the Port of Baltimore. Control and treated show levels in test
waters from time-integrated samples collected through the entire uptake, after the mixture of
Arizona Test Dust, micronized humate and instant
ice tea was added to water prior to the split in
control and treated lines.
Mean (mg/l)
SD
Ambient
8.5
0.15
Control
12.0
0.31
Treated
11.5
0.12
UV Transmittance
(UVT) percentages for challenge water during uptake. Ambient describes
natural conditions of water in the Port of Baltimore and T0, T1, and T2 for challenge water are
%UVT values from three sample time points (beginning, middle, and end of uptake) after the
mixture of Arizona Test Dust, micronized humate and instant
ice tea was added. The values for
T1 between filter and UV and T1 control were collected at the midpoint of the uptake process to
provide insight to influence of the filter on UVT.
Mean %UVT
SD
Ambient
86.9
0.40
T0 challenge water
73.9
0.32
T1 challenge water
73.9
0.40
T2 challenge water
79.0
0.55
T1 between filter and UV
73.0
0.87
Active Chlorophyll –
Control and treated show chlorophyll levels in test waters from time-
integrated samples collected through the entire uptake and discharge.
Live Organisms >50 µm –
The organism in the size category included: calanoida, harpacticoida,
copepod nauplii, polychaeta, barnacle nauplii, medusa, rotifer, eggs, and large diatoms.
Uptake
Mean µg/l
Uptake
SD
Discharge
Mean µg/l
Discharge
SD
Control
147.6
9.13
35.9
5.6
Treated
144.7
8.19
10.4
0.2
Uptake Mean
org/m
3
Uptake
SD
Discharge
Mean org/m
3
Discharge
SD
Control
93,203
9,068
61,187
6,034
Treated
63,872
7,347
605
169