(A) The allowable concentrations of hazardous metals in mg/l, determined on the basis of individual sampling in accordance with Standard Methods, are:
Not to Exceed | |||
Metal | Average | Daily Composite | Grab Sample |
Not to Exceed | |||
Metal | Average | Daily Composite | Grab Sample |
Arsenic | 0.1 | 0.2 | 0.3 |
Barium | 1.0 | 2.0 | 4.0 |
Cadmium | 0.05 | 0.1 | 0.2 |
Chromium | 0.5 | 1.0 | 5.0 |
Copper | 0.5 | 1.0 | 2.0 |
Lead | 0.5 | 1.0 | 1.5 |
Manganese | 1.0 | 2.0 | 3.0 |
Mercury | 0.005 | 0.005 | 0.01 |
Nickel | 1.0 | 2.0 | 3.0 |
Selenium | 0.05 | 0.1 | 0.2 |
Silver | 0.05 | 0.1 | 0.2 |
Zinc | 1.0 | 2.0 | 6.0 |
(B) No other hazardous metals or toxic materials may be discharged into public sewers without a permit from the city specifying conditions of pretreatment, concentrations, volumes and other applicable provisions. Prohibited hazardous materials include, but are not limited to: antimony, beryllium, bismuth, boron (greater than one mg/l), cobalt, iron (greater than five mg/l), molybdenum, rhenium, strontium, tellurium, uranylion, herbicides, fungicides and pesticides.
(Ord. passed 8-20-1985) Penalty, see § 54.99