The following is a partial list of toxic substances and pathogenic bacteria the discharge of which into the County sewerage system or sewers tributary thereto is hereby prohibited unless their concentration 1) is reduced by treatment at the source to a point that will meet the general purposes of these rules and regulations or come within the applicable standards set forth herein or under Article
VII; 2) will not adversely affect any of the biochemical, chemical or other sewage treatment processes:
C. Bromine, iodine, chlorine.
K. Silver and silver compounds.
L. Sulfonamides, toxic dyes (organic or mineral).
O. All strong oxidizing agents such chromates, dichromates, permanganates,
peroxides, etc.
P. Chemical compounds producing toxic, flammable or explosive gases,
either upon acidification, alkalization, oxidation or reduction.
Q. Strong reducing agents such as nitrites, sulfides, sulfites, thiosulfates,
etc.
R. Wastes from industrial processes or hospital procedures containing
viable pathogenic organisms.
The concentration in sewage of any of the following toxic substances
shall not exceed these concentrations judged by the Director to be
toxic to biological sewage treatment processes or to the biota of
the receiving waters and shall not in any case exceed the following
limits when such sewage is discharged to a public sewer. These limits
may be revised by the Commission whenever operating experience indicates
that it is desirable or the limits are superseded by Federal Categorical
Pretreatment Standard if and when more stringent standards are promulgated.
Toxic Substance
|
Maximum Permissible Discharge Concentration
(milligrams per liter)
|
---|
Cadmium
|
2.0
|
Chromium (hexavalent)
|
5.0
|
Copper
|
3.0
|
Cyanate
|
10.0
|
Cyanide
|
1.0
|
Mercuric chloride
|
2.0
|
Nickel
|
10.0
|
Silver
|
0.05
|
Zinc
|
5.0
|
Zirconium
|
10.0
|
Bromine, iodine, chlorine
|
100.0
|