"California Elections Code 9602. A voter who has signed an initiative or referendum petition, and who subsequently wishes his or her name withdrawn, may do so by filing a written request for the withdrawal with the appropriate elections official that includes the voter's name, residence address, and signature. This request shall be filed in the elections official's office prior to the date the petition is filed. A written request made under this section shall not constitute a petition or paper for purposes of Section 104."
If you have already signed the petition, but didn't realize it was for housing in the quarry, you can withdraw your signature. You must file a written request with City Clerk Kathy O'Connell, including your name, address, and signature. No reason is necessary, but you may wish to note that you found the materials or people circulating the petition to be misleading. Drop it off in person at City Hall, or mail it to Kathy O'Connell, City Clerk, 170 Santa Maria Avenue, Pacifica, CA 94044.