9
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
into control and treated lines.
Mean (mg/l)
SD
Ambient
0.9
0.004
Control
4.0
0.11
Treated
6.1
0.10
Percent UV Transmittance
(
UVT) at 254 nm for challenge water during uptake and discharge.
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.
Uptake
Mean %UVT
SD
Ambient
88.5
0.25
T0 challenge water
76.2
1.27
T1 challenge water
75.7
0.26
T2 challenge water
72.9
0.40
Discharge
Control Mean
%
UVT
Control
SD
Treated
Mean %UVT
Treated
SD
T0 challenge water
78.3
0.35
79.7
0.31
T1 challenge water
78.4
0.12
80.8
0.38
T2 challenge water
79.1
0.17
80.7
0.35
Active Chlorophyll –
Control and treated show chlorophyll levels in test waters from time-
integrated samples collected through the entire uptake and discharge.
Uptake
Mean µg/l
Uptake
SD
Discharge
Mean µg/l
Discharge
SD
Control
21.2
0.40
0.1
0.05
Treated
15.9
0.21
0.1
0.01