Cal. Public Resources Code § 3725.5

Any person who engages in the drilling, redrilling, deepening, maintaining, or abandoning of any low-temperature well, as defined in Section 3703.1, shall file with the supervisor an individual indemnity bond in the sum of two thousand dollars ($2,000) for each well less than 2,000 feet deep, ten thousand dollars ($10,000) for each well 2,000 feet deep or deeper, but less than 5,000 feet deep, fifteen thousand dollars ($15,000) for each well 5,000 but less than 10,000 feet deep, or twenty-five thousand dollars ($25,000) for each well 10,000 or more feet deep. The bond shall be filed with the supervisor at the time of the filing of the notice of intention to drill, redrill, deepen, maintain, or abandon, as provided in Section 3724 or 3724.1. The bond shall be executed by such person, as principal, and by an authorized surety company, as surety, and shall be in substantially the same language and upon the same conditions as provided in Section 3725, except as to the difference in the amount.