BACKGROUND:  Used Oil Filters may exhibit hazardous characteristics and hence are classified as hazardous waste in California. To encourage recycling of used oil filters, California DTSC adopted reduced handling requirements for drained used oil filters that are sent for recycling as scrap metal. Used oil filters must not be disposed in trash cans or at nonhazardous waste landfills.  Legislation was enacted in 2004 (AB 2254, Aghazarian) that allowed spent fuel filters from automobiles be added to spent oil filters for disposal.

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