(b) When making an estimation under this section of the reasonable costs of properly plugging and abandoning an operator’s well or wells and decommissioning any attendant production facilities, the division shall provide the operator with an opportunity to submit the operator’s own estimation and shall consider all of the following:

1. (1) The depth of the well or wells.
2. (2) The accessibility and surroundings of the well or wells and any attendant production facilities.
3. (3) Available information about the condition of the well or wells and any attendant production facilities.
4. (4) Available information about the cost to plug and abandon a comparable well or wells.
5. (5) Available information about the cost to decommission production facilities comparable to the production facilities attendant to the well or wells.
6. (6) The operator’s cost estimates, if provided.
7. (7) Whether the operator is a public utility gas corporation, as defined in subdivision (a) of Section 216 of the Public Utilities Code.
8. (8) Any other information that the division determines to be relevant to the estimation of cost.

(c) The division, in evaluating the risk that the operator will desert its well or wells and the potential threats the operator’s well or wells pose to life, health, property, and natural resources, shall consider all of the following:

1. (1) The difference between the estimation of reasonable costs of plugging and abandonment under subdivisions (a) and (b) and the total amount of indemnity bonds or other financial assurances in place to ensure funding of the plugging and abandonment of the operator’s well or wells.
2. (2) The level of current production from the well or wells.
3. (3) Available information regarding estimated reserves remaining in place associated with the well or wells.
4. (4) Whether the well or wells are “critical,” are “environmentally sensitive,” or are in an “urban area,” as those terms are defined by the division in regulation.
5. (5) To the extent that relevant information is available to the division, the financial status of the operator and the operator’s financial capacity to plug and abandon all of the operator’s wells.
6. (6) The past record of compliance by the operator with the division.
7. (7) The number of idle wells to be covered by the indemnity bond and the operator’s record of compliance with the requirements of Section 3206 and the division’s regulations related to the management of idle wells.
8. (8) Whether the operator’s well or wells are subject to any bonding or financial assurance requirements by a local government.
9. (9) Whether the operator’s well or wells are already subject to additional bond coverage by the division pursuant to Section 3270.4.
10. (10) Any other information that the division determines to be relevant to the evaluation of the risk.

(f)

1. (1) An operator shall provide additional security required under this section in the form of an indemnity bond, a form of deposit described in Section 995.710 of the Code of Civil Procedure, or any other equally effective means of financial assurance approved by the division. Examples of equally effective means of financial assurance that the division may consider for approval include a letter of credit, a corporate guarantee, a trust fund, or a demonstration of self-insurance.
2. (2) The division may only approve self-insurance as an equally effective means of financial assurance if the operator provides detailed financial information demonstrating to the division’s satisfaction that, based on the considerations under subdivision (c), the risks associated with the operator’s potential for desertion of its well or wells are low. If the division approves self-insurance as an equally effective means of financial assurance, at least once every five years the operator shall update the supporting financial information and the division shall reevaluate whether self-insurance continues to be an equally effective means of financial assurance. If an operator provides financial information to the division under this section that is not otherwise publicly available, the division shall maintain the information as confidential.

(g)

1. (1) Any two or more operators may elect to enter into a liability sharing agreement.
2. (2) Operators that elect to participate in a liability sharing agreement shall be jointly and severally liable for all amounts owed under this chapter by all other operators that participate in the liability sharing agreement.
3. (3) The division shall treat all operators that participate in a liability sharing agreement as a single operator when requiring additional security under this section, except that the additional security required by the division shall not exceed the lesser of the division’s estimation of the reasonable costs of plugging and abandoning all of the participating operators’ wells and decommissioning any attendant production facilities in accordance with Section 3208, or thirty million dollars ($30,000,000).
4. (4) A liability sharing agreement is formed when all of the participants have provided the division written notice of intent to participate in the liability sharing agreement with express acknowledgment of all other participants in the agreement.
5. (5) An operator may elect to withdraw from a liability sharing agreement at any time, but all participants in the liability sharing agreement, including the withdrawing participant, shall continue to be jointly and severally liable for all amounts owed under this chapter for a period of five years after the withdrawal.