Cal. Bus. & Prof. Code § 13596
Upon at least 24 hours' written notice from the owner, manager, or operator of the container, receptacle, pump, or storage tank which has been sealed, to the department or to the sealer of the county in which the premises are situated stating that the contents of such container, receptacle, pump, or storage tank will be removed or that such container, receptacle, pump, or storage tank or inlet end of the fill-pipe thereof will be properly labeled as provided in this chapter, at a specified time, between the hours of 9 a.m. and 4 p.m. of a day specified in the notice, other than a holiday, such officer shall, at the time specified, break the seal or seals for the purpose of permitting the removal by such manager, owner, or operator, of the contents of such container, receptacle, pump, or storage tank connected thereto, or the use thereof after proper labeling.
The removal of contents or proper labeling of the container, receptacle, pump, storage tank, or inlet end of the fill-pipe thereof, as the case may be, shall be made at the time specified and in the presence of the officer removing the seal.
Ca. Bus. and Prof'l. Code § 13596