Every food processing establishment shall be properly lighted, drained, plumbed, and ventilated; and shall be conducted with strict regard to the influence of lighting, drainage, plumbing, and ventilation upon the health of persons therein employed, and upon the purity and wholesomeness of the food therein produced, prepared for sale, manufactured, packed, stored, kept, handled, sold, or distributed.
Source:
Section 111960, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=111960..