The  Lead Work Pre-Job Notification Form is at  Cal-OSHA’s web page at DOSH.  Fill in the form and email it to  DOSHLeadNotice@dir.ca.gov.  The Code requires that you give 24 hour notice, so give them two days notice or you may be stuck waiting till the afternoon to start work, not a good thing.  You can call 1-800-963-9424 and report the job, but you will still have to send the written notice as a confirmation of the call.