The expense of an emergency response shall be a charge against the person liable for expenses under this article. The charge constitutes a debt of that person and is collectible by the public agency incurring those costs in the same manner as in the case of an obligation under a contract, expressed or implied, except that liability for the expenses provided for in this article shall not be insurable and no insurance policy shall provide or pay for the expenses.
Ca. Gov. Code § 53154