Cal. Pen. Code § 629.90
An order authorizing the interception of a wire or electronic communication shall direct, upon request of the applicant, that a public utility engaged in the business of providing communications services and facilities, a landlord, custodian, or any other person furnish the applicant forthwith all information, facilities, and technical assistance necessary to accomplish the interception unobtrusively and with a minimum of interference with the services which the public utility, landlord, custodian, or other person is providing the person whose communications are to be intercepted. Any such public utility, landlord, custodian, or other person furnishing facilities or technical assistance shall be fully compensated by the applicant for the reasonable costs of furnishing the facilities and technical assistance.
Ca. Pen. Code § 629.90