Cal. Pub. Res. Code § 3724.3

Drilling of program wells, as described in Section 3724.1, shall not commence until approval is given by the supervisor or the district deputy. If the supervisor or the district deputy fails to give the owner or operator written response to the program within 10 working days, such failure shall be considered as an approval of the program and the program shall, for the purposes and intents of this chapter, be deemed a written report of the supervisor.