(a) Except as specified in subdivisions (b) and (c), a mobile food facility where nonprepackaged food is cooked, blended, or otherwise prepared shall provide a warewashing sink with at least three compartments with two integral metal drainboards.

1. (1) The dimensions of each compartment shall be large enough to accommodate the cleaning of the largest utensil and either of the following:

   1. (A) At least 12 inches wide, 12 inches long, and 10 inches deep.
   2. (B) At least 10 inches wide, 14 inches long, and 10 inches deep.
2. (2) Each drainboard shall be at least the size of one of the sink compartments. The drainboards shall be installed with at least one-eighth inch per foot slope toward the sink compartment, and fabricated with a minimum of one-half inch lip or rim to prevent the draining liquid from spilling onto the floor.
3. (3) The sink shall be equipped with a mixing faucet and shall be provided with a swivel spigot capable of servicing all sink compartments.

(b) If all utensils and equipment of a mobile food facility are washed and sanitized on a daily basis at the approved commissary or other approved food facility, and the mobile food facility provides and maintains an adequate supply of spare preparation and serving utensils in the mobile food facility as needed to replace those that become soiled or contaminated, then the mobile food facility shall not be required to provide a warewashing sink to only handle any of the following:

1. (1) Nonpotentially hazardous foods that do not require preparation other than heating, baking, popping, portioning, bulk dispensing, assembly, or shaving of ice.
2. (2) Steamed or boiled hot dogs.
3. (3) Tamales in the original, inedible wrapper.

(c) An unenclosed mobile food facility that prepares potentially hazardous beverages for immediate service in response to an individual consumer order shall do one of the following:

1. (1) Provide a three-compartment sink described in subdivision (a).
2. (2) Provide at least one two-compartment sink that complies with subdivision (e) of Section 114099.3.
3. (3) Provide a one-compartment sink with at least one integral metal drainboard, an adequate supply of spare preparation and serving utensils to replace those that become soiled or contaminated, and warewashing facilities that comply with subdivision (a) in reasonable proximity to, and readily accessible for use by, food employees at all times.