SINCE 1994, FORSCH HAS MANUFACTURED, AT A MINIMUM, 54,000 UNITS OF URETHANE SAFETY WHEEL CHOCK, A PRODUCT WHICH CONTAINS OR IS MANUFACTURED WITH HYDROCHLOROFLUORCARBON 141B, A CLASS II SUBSTANCE. ACCORDING TO SECTION 610(D) OF THE CAA, IT IS UNLAWFUL FOR ANY PERSON TO SELL OR DISTRIBUTE ANY PLASTIC FOAM PRODUCT WHICH CONTAINS, OR IS MANUFACTURED WITH, A CLASS II SUBSTANCE.