California Code, Health and Safety Code - HSC § 1431

(a) Willfully prevent, interfere with, or attempt to impede in any way the work of any duly authorized representative of the state department in the lawful enforcement of any provision of this chapter.

(b) Willfully prevent or attempt to prevent any such representative from examining any relevant books or records in the conduct of his official duties under this chapter.

(c) Willfully prevent or interfere with any such representative in the preserving of evidence of any violation of any of the provisions of this chapter or of the rules and regulations promulgated under this chapter.