Section 180.1054 - Calcium hypochlorite; exemptions from the requirement of a tolerance(a) Calcium hypochlorite is exempted from the requirement of a tolerance when used preharvest or postharvest in solution on all raw agricultural commodities.(b) Calcium hypochlorite is exempted from the requirement of a tolerance in or on grape when used as a fumigant postharvest by means of a chlorine generator pad.59 FR 59165, Nov. 16, 1994, as amended at 74 FR 26534 , June 3, 2009