 Class II substances consist of 33 different hydro-chlorofluorocarbons (HCFCs).The EPA has already begun plans to decrease emissions in HCFCs and plan to completely phase out the class II substances by 2030.A firm operating in the electronics industry in Standard Industrial Classification (SIC) Codes 20-39 that has more than 10 full-time employees and consumes more than 10,000 lbs per year of any toxic chemical lists in 40 CFR 372.65 must file a toxic release inventory.