15A NCAC 18A .0618 HEAT SHOCK METHOD OF PREPARATION OF SHELLFISH
(a) Facilities. If a shucking and packing plant uses the heat shock process, it shall be done in a separate room adjacent to the shellstock storage room and the shucking room.
(b) Tank construction. The heat shock tank shall be constructed of smooth, non‑corrosive metal, designed to drain quickly and completely and to be easily and thoroughly cleaned.
(c) Booster heaters. All heat shock tanks shall be equipped with booster heaters that are thermostatically controlled.
(d) Shellstock washing. All shellstock subjected to the heat shock process shall be thoroughly washed with flowing potable water immediately prior to the heat shock operation.
(e) Water temperature. During the heat shock process the water shall be maintained at not less than 140°F (60°C) or more than 150°F (65°C). An accurate thermometer shall be available and used to determine the temperature during the heat shock process. The heat shock tanks shall be drained and cleaned at the end of each day's operation.
(f) Alternatives to heat shock method. Nothing in these Rules shall be construed to prohibit any other process which has been found equally effective.
(g) Water requirements. At least eight gallons of heat shock water shall be maintained in the tank for each one half bushel of shellstock being treated. All water used in the heat shock process shall be from a source approved by the Division under Rule .0413 of this Subchapter.
(h) Cooling. Immediately after the heat shock process, all treated shellstock shall be subjected to a cool‑down with potable tap water. All heat shocked shellstock shall be handled in a manner to prevent adulteration of the product. Shellfish which have been subjected to the heat shock process shall be cooled to an internal temperature of 45°F (7°C) or below within two hours after this process and shall be placed in storage at 40°F (4°C) or below.
(i) Cleaning. At the close of each day's operation, the heat shock tank shall be completely emptied of all water, mud, detritus, and thoroughly cleaned and then rinsed with flowing potable water.
(j) Sanitizing. All heat shock tanks shall be sanitized immediately before starting each day's operation.
History Note: Authority G.S. 130A‑230;
Eff. February 1, 1987;
Amended Eff. August 1, 2002; August 1, 1998; February 1, 1997; September 1, 1990.