Cal. Health & Safety Code § 25122.7
“Restricted hazardous waste” includes both of the following:
(b) Any hazardous waste which contains any of the following substances, in the following concentrations, as determined without considering any dilution which may occur, unless the dilution is a normal part of a manufacturing process:
(2) Liquid hazardous wastes containing any of the following metals or elements, or compounds of these metals or elements, at concentrations greater than, or equal to, any of the following:
| Arsenic | 500 milligrams per liter |
| Cadmium | 100 milligrams per liter |
| Chromium (VI) | 500 milligrams per liter |
| Lead | 500 milligrams per liter |
| Mercury | 20 milligrams per liter |
| Nickel | 134 milligrams per liter |
| Selenium | 100 milligrams per liter |
| Thallium | 130 milligrams per liter |