19
Live Organisms >50 µm –
Signs of stressed organisms (slow moving and slow response to
stimulus) were evident in treated uptake but not discharge. Non-motile bivalve larvae (not
gaping) and large disc diatoms that appeared intact and health (6/m
3
in treated discharge) where
included in these values. The organism in the size category included: calanoida, harpacticoid,
cyclopoid, copepod nauplii, polychaeta, bivalves, turbellaria, rotifers, nematode, eggs, cyst, and
disc diatoms.
Live Organisms 10-50 µm – E. veridis, C. closterium, P. minimum, L. minimum, S. trochoidea,
G. estuarale, Gymnodinium
sp
.,
Coscinodiscus
sp., and
Cymbella
sp. were the dominant species
observed in this size category. Tintinnids were also observed.
Viable Bacteria and Indicator Pathogens
–
In general, levels of regulated pathogens were low in
all samples regardless of analytical method used.
Enterococci
Uptake Mean
(
cfu/100 ml)
SD
Discharge Mean
(
cfu/100 ml)
SD
Control
<1.0
0.00
1.7
0.58
Treated
<1.0
0.00
<1.0
0.00
E. coli
Uptake Mean
(
cfu/100 ml)
SD
Discharge Mean
(
cfu/100 ml)
SD
Control
110.2
23.04
2.7
1.21
Treated
<1.0
0.00
<1.0
0.00
V. cholerae
Uptake Mean
(
cfu/100 ml)
SD
Discharge Mean
(
cfu/100 ml)
SD
Control
NEG
NEG
NEG
NEG
Treated
NEG
NEG
NEG
NEG
NEG: Negative, Vibrio cholerae O1 and O139 were not present in the sample
Heterotrophic
Plate Counts
Uptake Mean
(
cfu/100 ml)
SD
Discharge Mean
(
cfu/100 ml)
SD
Control
9,866.7
2,393.05
1,716.7
1,209.00
Treated
616.7
348.81
1,816.7
1,278.15
Uptake
Mean/m
3
Uptake
SD
Discharge
Mean/m
3
Discharge
SD
Control
142,202
2,925
252,394
4,271
Treated
5,130
133
12
0
Uptake
Mean/ml
Uptake
SD
Discharge
Mean/ml
Discharge
SD
Control
9,123
1,130
204
27
Treated
64
15
2
1