Appendix B – Action
and Limit Levels
Action and Limit
Levels for Water Quality Monitoring
|
Parameter,
unit |
Action |
Limit |
|
Dissolved
Oxygen |
<4.2 mg/L |
<2.0 mg/L |
|
pH |
<6.3 or >8.5 |
<6 or >9 |
|
Temperature |
Not applicable |
Within a daily range of 2oC |
|
Suspended Solids |
>23.75 mg/L, measured
as annual median |
>25 mg/L, measured as
annual median |
|
Ammonia
Nitrogen |
>0.01995 mg/L for
unionized form, as annual average |
>0.021 mg/L for
unionized form, as annual average |
|
E. coli |
>171 cfu per 100mL,
geometric mean for last 5 measurements |
>180 cfu per 100mL,
geometric mean for last 5 measurements |
|
5-day BOD |
>4.75 mg/L |
>5 mg/L |
|
COD |
>28.5 mg/L |
>30 mg/L |