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(a) It is unlawful to sell or distribute in commerce a product that contains bronopol, dowicil, formalin, formaldehyde, glutaraldehyde, paraformaldehyde, para-dichlorobenzene, benzene, toluene, xylene, ethylene glycol, 1,1,1-trichloroethane, trichloroethylene, or perchloroethylene in a container that indicates that the product is suitable for use in a holding tank or other portion of a waste facility of a recreational vehicle. (b) It is unlawful to use a product that contains bronopol, dowicil, formalin, formaldehyde, glutaraldehyde, paraformaldehyde, para-dichlorobenzene, benzene, toluene, xylene, ethylene glycol, 1,1,1-trichloroethane, trichloroethylene, or perchloroethylene in a holding tank or other portion of a waste facility of a recreational vehicle or of a campground chemical toilet that discharges to a septic system, onsite wastewater treatment system, or subsurface disposal system. (c) To the extent that funding is made available, the State Water Resources Control Board shall investigate methods to detect and quantify concentrations of chemical toilet deodorants, including bronopol, dowicil, formalin, formaldehyde, glutaraldehyde, paraformaldehyde, para-dichlorobenzene, benzene, toluene, xylene, ethylene glycol, 1,1,1-trichloroethane, trichloroethylene, or perchloroethylene, in a septic system, onsite wastewater treatment system, or subsurface disposal system that may inhibit biological treatment processes or result in degradation of groundwater quality. (d) (1) An owner or operator of a recreational vehicle park or campground that utilizes a septic system, onsite wastewater treatment system, or subsurface disposal system to dispose of recreational vehicle wastewater shall post in a conspicuous location a notice stating the following: “The State of California prohibits the use of products in RV holding tanks, including deodorizers, that contain bronopol, dowicil, formalin, formaldehyde, glutaraldehyde, paraformaldehyde, para-dichlorobenzene, benzene, toluene, xylene, ethylene glycol, 1,1,1-trichloroethane, trichloroethylene, or perchloroethylene. These chemicals can inhibit biological activity in onsite wastewater treatment systems and threaten groundwater and drinking water wells, and are strictly forbidden. Please use bacteria- or enzyme-based products.” (2) The State Water Resources Control Board or a regional water quality control board shall require an owner or operator described in paragraph (1) to certify compliance with paragraph (1) as part of any waste discharge requirement, or as a condition of a waiver of a waste discharge requirement, issued pursuant to Division 7 (commencing with Section 13000) of the Water Code. (e) Enforcement of subdivisions (a), (b), and (d) is contingent upon an appropriation by the Legislature for purposes of enforcing those requirements. (f) This section shall become operative on January 1, 2022.