Cal. Government Code § 54738

When determined by its legislative body to be in the public interest or necessary for the protection of the public health, the local agency may enter into and perform contracts, not to exceed a term of 40 years, with any industrial establishment for the provision and operation by the local agency of sewerage facilities to abate or reduce the pollution of water caused by discharges of industrial waste by the industrial establishment and the payment periodically or otherwise by the industrial establishment to the local agency of amounts at least sufficient, in the determination of such legislative body, to compensate the local agency for the cost of providing, including any payment of principal and interest charges, and of operating and maintaining the sewerage facilities serving such industrial establishment, or such portion of such cost as the legislative body determines is fair and equitable. Such contracts may be made irrespective of whether bonds are issued in connection therewith.