Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.
| Pollutant or pollutant property
| Pretreatment standards for existing sources
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (pounds per 1,000 lb) of product
|
| Lead | 0.0000939 | 0.0000313
|
| Zinc | 0.000141 | 0.0000469 |