16
Live Organisms >50 µm
–
Signs of stressed organisms (slow moving and slow response to
stimulus) were evident in treated uptake. Large grow out of calanoid copepods over the five day
hold period caused the increase in the control organism count. Non-motile bivalve larvae (not
gaping) and large disc diatoms that appeared intact and health (2/m
3
in treated discharge) where
included in these values. The organism in the size category included: calanoida, harpacticoid,
copepod nauplii, polychaeta, bivalves, barnacle nauplii, turbellaria, medusae, cnidarian, rotifers,
nematode, eggs, cyst, and disc diatoms.
Live Organisms 10-50 µm
–
E. veridis, Gymnodinium
sp
.
C. closterium, Leptocylindrus
minimum, S. trochoidea, P. minimum
and
Gyrodinium estuarale
and
Coscinodiscus
sp. were the
dominant species in this size category.
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
2.0
0.00
Treated
<1.0
0.00
<1.0
0.00
E. coli
Uptake Mean
(
cfu/100 ml)
SD
Discharge Mean
(
cfu/100 ml)
SD
Control
74.6
15.52
5.3
3.30
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 )
SD
Control
12,316.7
1,768.00
816.7
343.03
Treated
2,616.7
1,081.51
83.3
40.82
Uptake
Mean/m
3
Uptake
SD
Discharge
Mean/m
3
Discharge
SD
Control
136,284
3,518
968,822
12,386
Treated
9,254
1106
12
0
Uptake
Mean/ml
Uptake
SD
Discharge
Mean /ml
Discharge
SD
Control
8,160
998
107
13
Treated
32
4
3
1