CA Health & Safety Code Section 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.