All California Employers must notify  Cal-OSHA at least two days before starting any lead related work.  You can use the internet form to report the job, or call DOSH at 1-800-963-9424, and follow up the call with a written notification.   The long explanation is listed in the code subsection (d)(2).   There are exceptions, they  are in the lead-in-construction standard (California Code Title 8 CCR 1532.1).  You can avoid sending the notification if you are doing any of the following tasks:
(1) the lead content of the coating/paint is less than 0.5 percent by weight or 1.0 milligram per square centimeter of surface area,
(2) the amount of lead-containing coating/paint to be disturbed is less than 100 square or 100 linear feet, or
(3) the task to be performed is limited to torch cutting or welding for no longer than 1 hour in any shift.

Filling out and sending the DOSH form does not satisfy the DHS Regulations.  Be certain that you understand all the rules for  the DHS Form 8551.