Penal Code § 641.6
CHAPTER 2. Of Other and Miscellaneous Offenses
Notwithstanding any other provision of law, no person engaged in the business of dry cleaning shall use carbon tetrachloride or trichlorethylene as a cleaning agent when engaged in onsite dry cleaning. For purposes of this section, “onsite dry cleaning” means dry cleaning which is performed in a residence or any commercial or public building other than a clothes cleaning establishment or plant. A violation of this section is a misdemeanor.