Industrial Section of the
Environmental Compliance Team
UNION SANITARY
DISTRICT
Pretreatment
Ordinance #36
Limitations
Ordinance No. 36, Section 2: No person shall discharge wastes into the sanitary
sewer which exceed the following limitations on wastewater strength:
Pollutant
Limit for any 1 Sample
Sample Type
EPA
Test Method
Arsenic
Cadmium
Chromium (T)
Copper
Lead
Nickel
Mercury
Silver
Zinc
Cyanide
Formaldehyde
Oil and Grease (Animal & Vegetable)
Oil and Grease (Mineral)
pH
Phenols
Temperature
Total Toxic Organics
0.35 mg/l
0.2
mg/l
2.0
mg/L
2.0
mg/l
1.0
mg/l
1.0
mg/l
0.01 mg/l
0.5
mg/l
3.0
mg/l
0.65 mg/l
50.0 mg/l
300 mg/l
100 mg/l
Between 6.0 and 12.0
5.0
mg/l
No higher than 150
2.13 mg/l
24-h
24-h
24-h
24-h
24-h
24-h
24-h
24-h
24-h
grab
grab
grab
grab
grab
grab
grab
grab
206.2
213.1
218.1
220.1
239.1
249.1
245.1
272.1
289.1
335.2/3
6252.B/8315
1664 A
1664 A
150.1
604/625/420.1
170.1
624/625
Basis of Standards USD Ordinance No. 36
 Standard Methods Number
Note: Test methods listed are examples. Analyses must be performed using Approved Methods listed in
40 Code of Federal Regulations (CFR) 136.
Prohibited Wastes Include:
1.
Flammable or explosive substances
2.
Highly toxic and poisonous substances
3.
Substances which may obstruct flow
4.
Strongly odorous wastes
5.
Uncontaminated water (such as one-pass cooling water, storm water runoff, etc.)
6.
Sludges
7.
Wastes with temperatures over 150o F
8.
Most radioactive wastes (in excess of State Guidelines)
9.
Wastes which contain or result in the production of toxic, corrosive, explosive, or malodorous gases
10.
Organic solvents (including halogenated solvents) in excess of TTO limits. Consult Ordinance 36
for specific constituents.
For a complete list of prohibited wastes, see District Ordinance No. 36.
EC Data: Limits Sheet
revised 05/03/06