Table 4.8 Action
and Limit Levels for E. coli at
Monitoring Stations other than WSD Flushing Water Intakes, Gradient Stations
and Control Stations
|
Parameter
(unit) |
Monitoring locations |
Water Depth |
Action Level |
Limit Level |
|
E. coli (cfu/100ml) |
F1 |
Depth average (geometric
mean) |
14 cfu/100ml |
16 cfu/100ml |
|
F5 |
44 cfu/100ml |
46 cfu/100ml |
||
|
B7 |
147 cfu/100ml |
173 cfu/100ml |
||
|
B8 |
59 cfu/100ml |
63 cfu/100ml |
||
|
B9 |
20 cfu/100ml |
21 cfu/100ml |
||
|
B10 |
34 cfu/100ml |
39 cfu/100ml |
||
|
B11 |
36 cfu/100ml |
41 cfu/100ml |
||
|
B12 |
42 cfu/100ml |
50 cfu/100ml |
||
|
B13 |
47 cfu/100ml |
50 cfu/100ml |
||
|
B14 |
1 cfu/100ml |
1 cfu/100ml |
||
|
B24 |
2 cfu/100ml |
2 cfu/100ml |
||
|
B25 |
20 cfu/100ml |
24 cfu/100ml |
||
|
B26 |
2 cfu/100ml |
2 cfu/100ml |
Notes:
-
For E. coli,
non-compliance of water quality limits occurs when monitoring result is higher
than the limit levels.
- The Action and Limit Level were set as 95%-tile
and 99%-tile of the baseline data if they were lower than the criteria value of
610cfu/100ml.