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avoid using household hazardous materials, with proper disposal we can minimize the impact on the environment and protect the health and safety of our family and community. 4. “Protective laboratory practices and equipment” are available and in common use to minimize the potential for employee exposure to hazardous chemicals. Frequent disposal will ensure that hazardous waste accumulation areas in labs are managed properly, and that accumulation limits are not exceeded. UCR policy states that hazardous chemical waste can be stored in a laboratory for up to 180 days. Once a waste container is 80% full or it is near the 180 day time limit, it should be picked up by EH&S. The Waste Accumulation Storage Tracking electronically should be used to prepare compliant hazardous chemical waste labels as soon as any amount of waste is generated, and to request pickup of hazardous waste. Peroxide forming chemicals, or PFCs, include a number of substances that can react with air, moisture or product impurities, and undergo a change in their chemical composition during normal storage.