Cal. Health & Safety Code § 25230.5

(a) Treated wood waste generated, accumulated, stored, or transported within California shall be clearly marked and visible for inspection. The person managing the treated wood waste shall ensure that each unit or area designated for accumulation of treated wood waste is labeled. The area designated for accumulation of treated wood waste shall be clearly identified and used solely for the accumulation of treated wood waste.
(b) In order to clearly identify the nature of the waste to the receiving party or any observer, the treated wood waste shall be labeled or marked as follows:
“TREATED WOOD WASTE - Do not burn or scavenge.
Treated Wood Waste Handler Name and Address:
________________________________________________
________________________________________________
Accumulation Date: _________________________”.
(c) The treated wood waste handler shall ensure that labels are maintained in compliance with the requirements of subdivisions (a) and (b) during transport.
(d) Treated wood waste is exempt from the labeling requirements of this section under either of the following conditions:
1. (1) It is accumulated for a period not to exceed 30 days by a household at the site of generation in compliance with the requirements of Section 25230.6.
2. (2) It is generated by a household, while being self-transported to an approved treated wood waste facility if the treated wood waste is identified to the treated wood waste facility as treated wood waste.