10
Live Organisms >50 µm
–
Bivalve veligers accounted for 70% of counted organisms in treated
discharge. The larva grew in size over the five-day hold period. The organism in the size
category included: calanoida, copepod nauplii, polychaeta, bivalves, barnacle nauplii, cnidarian,
nematode, eggs, and disc diatoms.
Live Organisms 10-50 µm – Eutreptia veridis
and
Cylindrotheca closterium
were the dominant
species. Other species in this size category included:
Pediastrum
sp
.,
Protoperidinium
sp
.,
and
Melosira
sp
.
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
<1.0
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
20.3
16.8
77.2
10.64
Treated
3.6
0.78
1.0
0.00
V. cholerae
Uptake Mean
(
cfu/100 ml)
SD
Discharge Mean
(
cfu/100 ml)
SD
Control
NEG
N/A
NEG
N/A
Treated
NEG
N/A
NEG
N/A
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
10,216.7
2,069.2
5,550.0
1,067.24
Treated
1,000.0
616.4
1,450.0
1,025.18
Uptake
Mean/m
3
Uptake
SD
Discharge
Mean/m
3
Discharge
SD
Control
33,016
1,663
137,123
9,563
Treated
8,067
388
3,030
252
Uptake
Mean/ml
Uptake
SD
Discharge
Mean/ml
Discharge
SD
Control
5,430
785
672
171
Treated
196
67
10
2