2009 California Health and Safety Code - Section 114197-114201 :: Article 2. Liquid Waste

114197.  Liquid waste shall be disposed of through the approved
plumbing system and shall discharge into the public sewerage or into
an approved private sewage disposal system.

114199.  Equipment compartments that are subject to accumulation of
moisture due to conditions such as condensation, food or beverage
drip, or water from melting ice, shall be sloped to an outlet that
allows for complete draining.

114201.  (a) If provided, a grease trap or grease interceptor shall
not be located in a food or utensil handling area unless specifically
approved by the enforcement agency.
   (b) Grease traps and grease interceptors shall be easily
accessible for servicing.
   (c) Notwithstanding subdivision (a), those food facilities
approved with a grease trap or grease interceptor that are in
operation before the effective date of this part are not required to
comply with this section.