California Code, Health and Safety Code - HSC § 25230.9

(a) In any calendar year that a treated wood waste handler generates more than 10,000 pounds of treated wood waste, the handler shall obtain or maintain an identification number within 30 days of exceeding the weight threshold.

(b) In any calendar year that a treated wood waste handler generates more than 10,000 pounds of treated wood waste, the handler shall send written notification to the department within 30 days of exceeding the 10,000-pound limit. The notification shall include all of the following: