Cal. Health and Safety Code § 114103

(a) Except as provided in subdivisions (b) and (c), all warewashing equipment shall be provided with two integral metal drainboards of adequate size and construction. One drainboard shall be attached at the point of entry for soiled equipment and utensils and one shall be attached at the point of exit for cleaned and sanitized equipment and utensils. (b) Where a mechanical warewashing machine is used, there shall be two metal drainboards, one for soiled equipment and utensils, and one for clean equipment and utensils, located adjacent to the machine. The requirement for a drainboard for soiled equipment and utensils or the requirement for a drainboard for clean equipment and utensils, or both requirements, may be satisfied by using the drainboards that are part of the manual warewashing sinks if the sink is located adjacent to the machine. (c) Pot and pan washers shall be equipped with drainboards as required in subdivision (a), or shall be equipped with approved alternative equipment that provides adequate and suitable space for soiled and clean equipment and utensils. (d) Drainboards, utensil racks, or tables large enough to accommodate all soiled and cleaned items that may accumulate during hours of operation shall be provided for necessary utensil holding before cleaning and after sanitizing. (e) Sinks and drainboards of warewashing equipment shall be sloped and drained to an approved liquid waste receptor.