§ 19-40. Hazardous metals and toxic materials.

(a)

No discharges may contain concentrations of hazardous metals other than amounts specified in subsection (b) of this section.

(b)

The allowable concentrations of hazardous metals, in terms of milligrams per liter (mg/l), for discharge to inland waters, and determined on the basis of individual sampling in accordance with "Standard Methods," are:

Metal	Average	Not to Exceed Daily Composite	Grab Sample
(1) Arsenic	0.1	0.2	0.3
(2) Barium	1.0	2.0	4.0
(3) Cadmium	0.05	0.1	0.2
(4) Chromium	0.15	0.5	0.5
(5) Copper	0.5	1.0	2.0
(6) Lead	0.15	0.15	0.15
(7) Manganese	1.0	2.0	3.0
(8) Mercury	0.005	0.005	0.01
(9) Nickel	0.15	0.8	0.8
(10) Selenium	0.05	0.1	0.2
(11) Silver	0.05	0.1	0.2
(12) Zinc	1.0	2.0	6.0

 

(c)

No other hazardous metals or toxic materials may be discharged into public sewers without a permit from the approving authority specifying conditions of pretreatment, concentrations, volumes, and other applicable provisions.

(d)

Prohibited hazardous materials include, but are not limited to:

(1)

Antimony;

(2)

Beryllium;

(3)

Bismuth;

(4)

Cobalt;

(5)

Molybdenum;

(6)

Uranylion;

(7)

Rhenium;

(8)

Strontium;

(9)

Tellurium;

(10)

Herbicides;

(11)

Fungicides;

(12)

Pesticides.

(e)

The allowable levels of hazardous metal and toxic materials must be achieved by treatment, to remove these metals and materials. The allowable levels may not be achieved by dilution.

(Ord. No. 246, § 4, 12-9-80; Ord. No. 299, 8-27-85)