Effluent Concentration Limit
| ||
---|---|---|
Substance1
|
Allowable Average Daily2
(mg/l)
|
Allowable Maximum Instantaneous3
(mg/l)
|
Aluminum
|
0.6
|
1.2
|
Antimony
|
0.4
|
0.8
|
Arsenic
|
0.2
|
0.4
|
Barium
|
4.0
|
8.0
|
Beryllium
|
0.4
|
0.8
|
Bismuth
|
0.4
|
0.8
|
Bromine
|
4.0
|
8.0
|
Cadmium
|
0.4
|
0.5
|
Chlorides
|
500.0
|
750.0
|
Chlorine
|
5.0
|
5.0
|
Chromium (hex)
|
0.2
|
0.1
|
Chromium (tot)
|
4.0
|
1.0
|
Cobalt
|
0.8
|
1.6
|
Color
|
20.0
|
35.0
|
Copper
|
0.8
|
1.6
|
Cyanide (complex)
|
1.6
|
0.10
|
Cyanide (free)
|
0.4
|
0.8
|
Fluorides
|
4.0
|
8.0
|
Gold
|
0.2
|
0.4
|
Iodine
|
4.0
|
8.0
|
Iron
|
0.6
|
5.0
|
Lead
|
0.2
|
0.1
|
Manganese
|
4.0
|
8.0
|
Mercury**
|
0.2
|
Less than 500 ng/l
|
Molybdenum
|
4.0
|
8.0
|
Nickel
|
4.0
|
1.0
|
Phenols, total
|
4.0
|
8.0
|
Selenium
|
0.2
|
0.4
|
Silver
|
0.2
|
0.25
|
Sulfates
|
500.0
|
25.0
|
Sulfides
|
6.0
|
12.0
|
Tin
|
0.6
|
1.2
|
Titanium
|
0.6
|
1.2
|
Vanadium
|
4.0
|
8.0
|
Zinc
|
1.2
|
0.20
|
NOTES:
| |
---|---|
1Except for chromium
(hex), 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 two or less, without prior filtration.
| |
2As determined on
a composite sample taken from the user's daily discharge over a typical
operational and/or production day.
| |
3As determined on
a grab sample taken from the user's discharge at any time during the
daily operational and/or production period.
| |
**
|
The permittee shall inspect each tributary dental facility at
least once every five years to verify compliance with the wastewater
treatment operation, maintenance, and notification elements of 6 NYCRR
Part 374.4. Inspection and/or outreach to other industrial/commercial
sectors which may contribute mercury is also recommended. All new
or increased tributary discharges, including hauled wastes, which
are from sources that are industrial in nature must be evaluated for
mercury content, and if levels exceed 500 ng/l then authorization
must be obtained from the Department prior to acceptance. A file shall
be maintained containing the notices submitted by dental offices and
all other pertinent information. This file shall be available for
review by DEC representatives, and copies shall be provided upon request.
Note that a permit modification may be necessary to include more stringent
requirements for POTWs which do not maintain low mercury effluent
levels.
|
Substance
|
Allowable Influent Loading Average Daily
(pounds per day)
|
---|---|
Aluminum
|
0.500
|
Antimony
|
0.330
|
Arsenic
|
0.167
|
Barium
|
3.360
|
Beryllium
|
0.330
|
Bone
|
0.250
|
Cadmium
|
0.336
|
Chromium (hex)
|
0.167
|
Chromium (total)
|
3.0
|
Cobalt
|
0.670
|
Copper
|
0.672
|
Cyanide (complex)
|
0.30
|
Cyanide (free)
|
0.336
|
Gold
|
0.167
|
Iron
|
0.500
|
Lead
|
0.167
|
Mercury
|
0.167
|
Nickel
|
3.0
|
Phenols (total)
|
3.340
|
Selenium
|
0.167
|
Silver
|
0.167
|
Suspended solids
|
0.250
|
Tin
|
0.500
|
Zinc
|
0.60
|