Source Effluent Concentration Limit
| |
---|---|
Substance
(1)
|
Allowable Daily Average
(mg/l)
(2)
|
Arsenic
|
0.25
|
Cadmium
|
0.07
|
Chromium
|
0.6
|
Copper
|
1.0
|
Cyanide, total
|
1.0
|
Cyanide (free)
|
0.1
|
Formaldehyde as HCHO vapor
|
0.06
|
Boron
|
1.0
|
Lead
|
1.0
|
Mercury
|
0.05
|
Methylene chloride
|
2.06
|
Molybdenum
|
0.14
|
Nickel
|
1.0
|
Phenol, total
|
2.25
|
Selenium
|
0.1
|
Silver
|
2.3
|
Tetrachloroethylene (PCE)
|
0.71
|
Trichloroethylene (TCE)
|
0.53
|
Zinc
|
3.0
|
Oil and grease, polar
|
100
|
Oil and grease, nonpolar
|
25
|
pH
|
5.0 - 11.0 S.U.
|
(1) All concentrations listed for metallic substances
shall be as "total metal," which shall be defined as the value measured
in a sample acidified to a pH value of 2 or less, without prior filtration.
|
(2) As determined on a composite sample taken
from the user's daily discharge over a typical operational and/or
production day, except for cyanide, phenol, pH and oil and grease,
which shall be determined using grab samples. For pH and oil and grease,
the limit is instantaneous, not an average daily limit. The average
daily limit means the average of all measurements during a calendar
day or twenty-four-hour period.
|